Structural Modeling

Engineering Dynamics, Inc. Training 2011

Structural Modeling Page - 1

Section 1 Starting a model In windows file explorer create a directory called Training Project, and a subdirectory called Structural Modeling. Launch SACS Executive and go to SACS Settings\Units Settings and set default units to Metric KN Force. Then click on the OK button. See picture below.

Set current working directory to Structural Modeling and launch Precede program by clicking on Modelericon in Interactive window of Executive (See picture below).

Click here to launch Precede



Select Create New Model and click ok. Then select Start Structure Definition Wizard and click ok.(See two pictures below).

Section 2 Defining the jacket/pile and conductor model Define the jack/pile based on the drawing 101 Elevations: Water depth 79.5 m Working point elevation: 4.0 m Pile connecting elevation: 3.0 m Mudline elevation, pile stub elevation, and leg extension elevation: -79.5m Other intermediate elevations: -50.0, -21.0, 2.0, 15.3 (cellar deck), 23.0m (main deck) (See picture below)

Click here to create the new model



Keep Generate Seastate hydrodynamic data checked to create hydrodynamic data, such as pile and w.b overrides. Legs: Click on the Legs Tab to enter the data for the jacket legs. Number of legs: 4 Leg type: Ungrouted Leg spacing at working point: X1=15 m, Y1=10 m. Row Labeling: Define the Row label to match the drawing Pile/Leg Batter: Row 1 (leg 1 and leg 3, 1st Y Row) is single batter in Y Row 2 (leg 2 and leg 4, 2nd Y Row) is double batter (See picture below for the details of the input)

Conductors: Click on the Conductors Tab and then click on Add/Edit Conductor Data to enter the data for the conductors. One conductor well bay that has four conductors The top conductor elevation: 15.3m First conductor number: 5 Number of conductors in X direction: 2 Number of conductors in Y direction: 2 The location of first conductor (LL): X= -4.5m, Y= -1.0m (See drawing 102/104) The distance between conductors: 2.0m in both X and Y directions. Disconnected elevations: -79.5m, 3.0m, and 4.0m.

Click here to define leg spacing at the working point.



(See picture below for the details of the conductor data input)

Click-on Apply to create the leg/pile and conductor model as shown below.



Save model: Go to File/Save As, click O.K from prompted window and give file name sacinp.dat_01. Define properties of leg members: We can set up the User Defined Units as English Units for tubular member diameters and wall thickness. On the Precede toolbar select Property>Member Group. The Member Group Manage Window will show up (See picture on the right). The Undefined Group window shows all group IDs which are assigned to members, but their properties have not been defined. The IDs will be moved to Defined Groups Window after properties are defined. Click LG1 from Undefined Groups window and then click on Add Tab to define the section and material properties of LG1.This group is segmented and the data can be found in Drawing 101. Segment 1: D =48.5in, T = 1.75in, Fy = 34.50 kN/cm2, Segment Length = 1.0 m Segment 2: D =47.0in, T = 1.0in , Fy = 24.80 kN/cm2 Segment 3: D = 48.5in, T = 1.75in, Fy = 34.50 kN/cm2, Segment Length = 1.0 m Member is flooded The unit of each input filed can be modified to use available data. In the pictures below the unit of Outside Diameter and Thickness are changed to English (in). The segment length will be designed later. See the pictures below for the details of the LG1 group data input.



Repeat above to define LG2 and LG3 group, the data can be found in Drawing 101. Define groupLG4,DL6, DL7, CON, PL* and Wishbone groups, find the section dimensions from Drawing 101. LG4 = 48.5x1.75 DL6 = 42x1.5 DL7 = 42x1.5 CON = 30x1 flooded PL* = 42x1.5 W.B. = 30x1 flooded To define those non-segmented groups click the group ID from Undefined Group Window and then click on Add Tab; enter the data and Apply. The picture on the right shows the LG4 data. All above groups have section type of Tubular, and both the geometry and material data can be defined in Group Manage window.

Click here to add segment Click here to add thethird

Click here after the last segment is defined to finish group LG1



Save model: File/Save As, and name the file to sacinp.dat_02. Member groups defined at this time shall look like the following: ------------------------------------------------------------------------------------------------------------- GRUP CON 76.200 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP DL6 106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP DL7 106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP LG1 48.500 1.750 20.007.72234.50 1 1.001.00 0.500F7.84901.00 GRUP LG1 47.000 1.000 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP LG1 48.500 1.750 20.007.72234.50 1 1.001.00 0.500F7.84901.00 GRUP LG2 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.00 GRUP LG2 119.38 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP LG2 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.00 GRUP LG3 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.00 GRUP LG3 119.38 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP LG3 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.00 GRUP LG4 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.8490 GRUP PL1 106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP PL2 106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP PL3 106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP PL4 106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP PL5 106.68 3.810 20.007.72224.80 1 1.001.00 0.500 7.8490 GRUP W.B 76.200 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 ------------------------------------------------------------------------------------------------------------- Section 3 Create the horizontal framings of the jacket Open file sacinp.dat_02 or continue from last section. Step 1 Select the View Go to Display> Plan and pick -79.5 to create the framing at the mudline elevation.TheStructural plan can be found in Drawing 103Plan @ EL (-) 79 500. The model of the plan after built will be shown in the model plot Plan at EL-79.5 Go to Display>Group Selection to exclude Pile and Wishbone elements from the current view. See picture below for details. You should only see the joints on the jacket legs and conductors in the current view.



Step 2 Add horizontal members to connect the legs Go to Member>Add to get dialog box shown below. Click on 101L and 102L and enter H11as group ID. Then click on Apply or Right-click to add the member, see picture on the right. Repeat to create member 101L-103L, 102L-04L and 103L-104L.

Step 3 Divide the members by ratio The joint 1100, 1101 and 1102 can be added by divide member by ratio since the joints are at the mid points of the beams.

Exclude selected groups from the view

Groups selected

Uncheck here to remove unattached joints



To create joint 1100, go to Member> Divide>Ratio to get the dialog box shown on the left. Click-on Member 103L-104L Enter 0.5 to Ratio from joint A Enter new joint name 1100 Check on Use next available Leave others blank Click Apply to create the joint

You will be getting a new joint and two new elements, the original member 103L-104L has been replaced by two new created members. Repeat this step to create joint 1101 and 1102. Step 4 Divide the member by length Joint 1103 and 1104 can be defined by using Divide by Distance based on the available dimensions on Drawing 101.

To create joint 1103, go to Member>Divide>Length to get the dialog box shown on the left. Click to select member 101L-103L Enter 11.35m to Length from Joint A New Joint name should be 1103 Keep Use next available name checked Leave others blank Joint 1004 can be added same way with distance=4.0m.

Step 5 Connect diagonal brace members Add a member connecting Joint 1101-1100, and define group label as H12. Add the members connecting Joint 1101-1102, 1102-1100, 1104-1100 and 1101-1103, and define group ID as H13.



Step 6 Create well head frame members Joint 1105 and 1106can be defined by using Divide by Length based on the available dimensions on Drawing 101, same as Joint 1103 and 1104.

To create joint 1105, go to Member>Divide>Length to get the dialog box on the left. Click to select member 1101-1100 Enter 11.35m to Length from Joint A New Joint name should be 1105 Keep Use next available name checked Leave others blank Joint 1006 can be added the same way with distance=4.0m.

Add member 1104-1106 and 1103-1105, Group ID should be H13 Use Member>Divide>Length to create Joint 1107, 1108, 1109 and 1110. The distances can be found in the drawing, see pictures below for adding Joint 1107 and 1110.

Add Member 1107-1108 and 1109-1110 with Group ID H14. Step 7 Define member group properties Define the group properties to H11, H12, H13 and H14, the dimensions and material can be found in the drawing. The pictures below show the sample of H11 and H12 definition.



Note that the unit of each input can be changed to match available data. The following pictures show the diameter and thickness being changed to an English Unit so the data from the drawing can be input directly. *Make sure units chosen are correct.

Repeat all the steps in Section 3 to create horizontal plans at elevation -50.0m, -21.0m and 2.0m.All the data and dimensions needed to build the model can be found in Drawings 102 and 103.The joint name and group ID can be found in model plots Plan at EL-50, Plan at EL-20 and Plan at EL+2 PDF files. Section 4 Create conductor guide framing Use Plan at EL-50.0 as a sample: Step 1 Create the joints to connect the conductor guide Divide members 2107-2109, 2108-2110 by ratios to create joints 2111 and 2112; Add members 2107-2108, 2109-2110, and 2111-2112 and then divide them by ratios to create joint 2113, 2114, and 2115. Connect members 2113-2115 and 2115-2114. Step 2 Define member group for conductor guide frame Use Property>Member Group to define the group property for the conductor guide frame. The conductor and frame connection model is shown in the picture below.



Repeat the steps above to build the conductor connections at elevation -21.0 and 2.0. Save the file to SACINP.dat_03. Section 5 Create diagonal members on jacket rows Step 1: Open sacinp.dat_03 with Precede and go to Display>Face and pick Row A. Step 2 Go to Display>Group Selections to turn off the Pile and Wishbone elements from the view. Step 3: Turn on the Joint and Group label by clicking on the J and G icon on the toolbar. Step 4: Define the X-brace between elevation - 79.5m and -50.0m.



Go to Member>X-Brace to get the dialog box on the right, and enter the data: Center joint name 101X Pick four joints 101L, 202L, 201L and 102L (Pick the joints diagonally) Enter BR1 as group ID of through members (101L-202L) Enter BR2 as the group of other members Use 0.9 as the K factor Click on Apply

Step 5: Define the X-brace between elevation -50.0m and -21.0m Go to Member>X-Brace to get the dialog box on the right, and enter the data: Center joint name 201X Pick four joints 202L, 301L, 302L, and 201L (Pick the joints diagonally) Enter BR3 as group ID for through members (202L-301L) Enter BR4 as the group for the other members Use 0.9 as the K factor Click on Apply Step 6 Repeat Step 5 to build the X-brace between Elevation -21.0m and 2.0m.The new center joint name should be 301X; group IDs should be BR5 for through members and BR6 for others. The locations of center joints 101X, 201X and 301X are automatically calculated by the program.



Step 7 Repeat Step 1 to Step 6 to build X-braces on Row B, Row 1 and Row 2; use same Group IDs and the center joint ID starts from 102X on Row B, 103X on Row 1 and 104X on Row 2. Step 8 Define the group properties for the X-brace members. BR1, BR3, and BR5 are through members which are segmented. BR2, BR4, and BR6 are non-segmented members. The dimensions of all members can be found in Drawing 101. Save model and give a new name sacinp.dat_04. Section 6 Creating deck frame Step 1 Cellar Deck (El +15.30m): Go to File>Structure Definition and click on the Deck Girders Tab. Then click on Add/Edit Deck Girder Data. You should see the following window below. Deck elevation: select 15.30 Deck extension: input 4.0m at structure North and South Click Apply to apply the input information to the model.

Check-on here to add the deck extension beams



Step 2 Main deck (El +23.0m) Click on Add/Edit Deck Girder Data Deck elevation: select 23.00 Deck extension: input 4.0m at structure North and South, 5.0m at structure East Click Apply or OK to apply to model. By clicking ok it will apply to the model and also

close out the structure definition box.

Step 3 Go to Display>Plan and select Plan at 15.3. Then go to Display>Labeling>Special and turn off Show jacket rows to get a larger view. Turn on the Joint and Group Label from Toolbar icon. Step 4 Change the member group ID to W01 and W02 as shown in model plot Plan at 15.3, go to Member > Details/Modify and select the elements to change. Step 5

Check-on here to add the deck extension beams



The Member divide feature can be used to simplify modeling. Joint and group names should be defined as shown in the model plot Plan at 15.3. The dimensions needed to build the model can be found in Drawing 202. The functions recommended to build the frame model are: Member>Divide>Distance Member>Divide>Ratio Member >Divide>Perpendicular The new created joints naming should start from 7100.All the distances and ratios can be found in the drawing. The conductor guide should be connected to the deck using dummy members. This is the same as the ones in the jacket. Step 6 Repeat Step 3 to Step 5 to build the frame in EL 23.00 plan, and the modeling results are shownin the model plotPlan at 23.0. Step 7 Define the properties for group W01 and W02; the sections should be selected from the AISC 9th edition Library.

The above three pictures is a sample of how to define W01 (From Left to Right).Repeat it to define the properties for W02. Deck member groups defined at this time shall look like thefollowing: ------------------------------------------------------------------------------------------------------------- GRUP W01 W24X162 20.007.72224.80 1 1.001.00 7.8490 GRUP W02 W24X131 20.007.72224.80 1 1.001.00 7.8490 -------------------------------------------------------------------------------------------------------------

Click to select Section from the Library

Select wide flange only



Save the model as sacinp.dat_05 Section 7 Joint connection design Step 1 Include only the jacket in the current active window. Exclude the deck, piles, conductors, and wishbone element from the current view. Go to Display>Group Selections and exclude group PL1-PL5, W01, W02, CON, DL6-DL7, and W.B. Check off show unattached joints and then click on Apply. Refer to the picture below.

Step 2 Go to Joint> Connection > Automatic Design. Check the box Offset braces to outside of chord. For Gapping option use Move Brace, and for Brace Move use Along Chord. Set Gap = 5 cm and Gap size option to Minimum only. Select Use existing offsets if gap criteria is met.



Under joint Can/Chord options select Update segmented groups can lengths and set Can length option to API minimum requirements. Select Increase joint can lengths only, seee above two pictures for the detail options to be selected and click on Apply to create the joint can model. The leg members segment lengths are automatically updated and the member end offsets of each brace member are created automatically. Step 3 Create dummy members to connect the guide joint to the framing joint created in last step. The conductor and frame connection model is shown in the picture below. DUM = 12.75 x .375



Repeat the steps above to build the conductor connection elevation -21.0, 2.0 and 15.3. Save the model to sacinp.dat_06. The final updated Can length for legs shall look like the following: ------------------------------------------------------------------------------------------------------------- GRUP LG1 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84902.10 GRUP LG1 119.38 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP LG1 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.76 GRUP LG2 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84902.16 GRUP LG2 119.38 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP LG2 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.63 GRUP LG3 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84902.33 GRUP LG3 119.38 2.540 20.007.72224.80 1 1.001.00 0.500F7.8490 GRUP LG3 123.19 4.445 20.007.72234.50 1 1.001.00 0.500F7.84901.60 GRUP LG4 123.19 4.445 20.007.72234.50 1 1.001.00 0.500 7.8490 ------------------------------------------------------------------------------------------------------------- Section 8 Define deck beam offsets Step 1 Go to Display>Plan and select plan at 15.3m. Exclude group DUM, W.B and CON from current view. Step 2



Go to Member > Offsets and drag a window to pick all members in current view (Selected members will be highlighted in red). Change Offset Type to Top of Steel. Click on Apply to create the offsets. Refer to picture on the right. Note: The deck beam properties must be defined before you can define the offset type to Top of Steel.

Step 3 Repeat above two steps to define the offset for the beams at Plan EL 23.00m. Save the model to sacinp.dat_06. Section 9 Define member code check properties Define Ky/Ly for horizontal framings: Use Property > K Factor > Ky to modify Ky factor for H11 members in XY plane Z=-79.50 m and H21 members in XY plane Z=-50.0 m Use Property > Effective Length > Ly to modify Ly factor for H31 members in XY plane Z=-21.0 m and H41 members in XY plane Z=2.0 m Section 10 Define deck weight (Area weight) Step 1 Add cellar deck surface weight ID (CELLWT1) Using Weight > Surface Definition input CELLWT1 for Surface ID, pick up joint 71BD, 71ED, and 74BD for local coordinate joints. Input 0.5 for Tolerance, and pick up71BD, 71ED, 74ED and 74BD by holding CTRL key for Boundary joints. Select load direction to Members in local Y and then click Apply to add this surface ID definition.



Step 2 Add main deck surface weight ID (MAINWT1) Using Weight > Surface Definition input MAINWT1 for Surface ID. Pick up joint 81BD, 81FD and 84BD for local coordinate joints, input 0.5 for Tolerance, and pick 81BD, 81FD, 84FD and 84BD by holding CTRL key for Boundary joints. Select load direction to Local Y and then click Apply to add this surface ID definition.

Step 3 Add weight group AREA by adding surface weight for deck



Using Weight > Surface Weight input AREA as Weight Group and AREAWT as Weight ID, input weight pressure of 0.5 kN/m2 for the cellar deck and move CELLWT1 to Included Surface IDs and click Apply. Then input a weight pressure of 0.75 kN/m2 for the main deck and move MAINWT1 to Included Surface IDs and click Apply.

Step 4 Add weight group LIVE by adding surface weight Add weight group LIVE by using surface weight feature as in step 3. Weight ID MAINLIVE includes the main deck weight pressure of 5.0 kN/m2and ID CELLLIVE includes the cellar deck weight pressure = 2.5kN/m2.



The added surface IDs and surface weights shall look like following: ------------------------------------------------------------------------------------------------------------- SURFID CELLWT1 LY 71BD 71ED 74BD 0.500 SURFDR 71BD 71ED 74ED 74BD SURFID MAINWT1 LY 81BD 81FD 84BD 0.152 SURFDR 81BD 81FD 84FD 84BD SURFWTAREA 0.500AREAWT 1.001.001.00CELLWT1 SURFWTAREA 0.750AREAWT 1.001.001.00MAINWT1 SURFWTLIVE 2.500CELLLIVE 1.001.001.00CELLWT1 SURFWTLIVE 5.000MAINLIVE 1.001.001.00MAINWT1 ------------------------------------------------------------------------------------------------- Section 11 Define deck weight (Equipment weight) Step 1 Define Skid1 Use Weight > Footprint Weight Weight group is EQPT and Footprint ID is SKID1; Weight = 1112.05 kN; Footprint center (5.0, 2.0, 23.0); Relative weight center (0, 0, 3.0) Skid Length = 6 m; Skid Width = 3 m; 2 skid beams in X direction (longitudinal)

Click Apply and the summation of forces will be shown on a pop-up window. To save the input footprint weight select Keep. Step 2 Define Skid2 Weight group is EQPT and Footprint ID isSKID2 Weight = 667.23 kN; Footprint center (-5.0, -7.0, 23.0); Relative weight center (0, 0, 2.5)



Skid Length = 6 m; Skid Width = 2.5 m; 2 skid beams in X direction (longitudinal)

Step 3 Define Skid4 Weight group ID is EQPT and Footprint ID is SKID4 Weight = 155.587 kN; Footprint center (10.0, 6.0, 23.0); Relative weight center (0, 0, 4.0) Skid Length = 6 m; Skid Width = 3 m; 3 skid beams in X direction (longitudinal)

Step 4 Define Skid3



Weight group is EQPT and Footprint weight ID is SKID3 Weight = 444.82 kN; Footprint center (5.0, 0.0, 15.3); Relative weight center (0, 0, 2.0) Skid Length = 6 m; Skid Width = 2.5 m; 2 skid beams in X direction

The added EQPT footprint weights shall looks like following: ------------------------------------------------------------------------------------------------------------- WGTFP EQPT1112.05SKID1 5.000 2.00023.000R 3.0006.0003.000 2 WGTFP2 1.001.001.00.152L WGTFP EQPT667.230SKID2 -5.000-7.00023.000R 2.5006.0002.500 2 WGTFP2 1.001.001.00.152L WGTFP EQPT155.587SKID4 10.000 6.00023.000R 4.0006.0003.000 3 WGTFP2 1.001.001.00.152L WGTFP EQPT444.820SKID3 5.000 15.300R 2.0006.0002.500 2 WGTFP2 1.001.001.00.152L ------------------------------------------------------------------------------------------------------------- Section 12 Define misc weight on the deck and the jacket Step 1 Walkway on the main and cellar decks Go to Weight > Member Weight and hold control key to select all members on the east side of the decks, and enter the following data:



Weight group: MISC Weight ID: Walkway Weight Category: Distribute Coordinate system: Global Initial weight value: 2.773 kN/m Final weight value: 2.773 kN/m Load dir. factors: Defaults Click on Apply and keep the weight.

Step 2 Enter crane weight Go to Weight > Joint Weight and pick up joint 804L and enter the data: Weight Group: MISC Weight ID: CRANEWT Weight: 88.964kN Load dir. Factors: Defaults Click on Apply then select Keep, see pictures on the right.

Step 3 Enter the Firewall weight Go to Weight > Member weight and select the following members: 703L-74BD, 7102-7103, 7106-7107, and then enter the following data:



Weight Group: MISC Weight ID: FIREWALL Weight Cate.: concentrated Coord system: Global Concen. Weight: 15.0kN Distance: 1.5m Load factors: Defaults Click on Apply and select to Keep the weight, see pictures on the right for details.

Step 4 Enter Padeye weight on the jacket Go to Weight > Joint Weight and pick up joint 501L, 502L, 503L and 504L, and enter the following data: Weight group: LPAD Weight ID: PADEYE Weight: 2.0kN Check on Include buoyancy Density: 7.849 ton/m^3 Click on Apply and Keep, see pictures on right for details.

Step 5 Enter the walkway weight at boat landing elevation (EL 2.0m) Go to Weight > Member Weight and pick all the members at EL 2.0 plan except the wellbay members and then enter the data as following: Group ID: WKWY Weight ID: WLKWAY Weight Category: Distributed Coord. System: Global Initial weight: 1.5kN/m

Final weight: 1.5kN/m Load dir. Factors: Defaults Include buoyancy: Yes & wave load: Checked Density: 1.5ton/m^3



Click on Apply and Keep the data. See picture on the right for details.

Step 6 Define Anode weight Go to Display > Volumes and select Type of volume to Volumes to include. Select joint 101L to get the min. Z-coordinate and select joint 301X to get the max. Z-coordinate, and then click Apply. This will display only the part of jacket with anode protection. Go to Display > Group selection to exclude group DUM, PL1-PL5, W.B, CON, H13-H14, H23-H24 and H32-H33.This will exclude the wishbone, conductor, pile, and horizontal elements from the current view. Go to Weight > Anode Weight and drag a window to select all the members in the current view and enter the data as following: Weight group ID: ANOD Weight ID: Anode Anode weight: 2.5kN # Anodes: 2/Member Anode space: Equal Include Buoyancy: On Density: 2.70tonne/m^3

Click on Apply and Keep the weight, see picture on right for details.

Save the mode to Sacinp.dat_07. Part of jacket weights shall look like following: ------------------------------------------------------------------------------------------------------------- WGTMEMANOD101L101X 6.040 2.500 1.001.001.00GLOBCONC 2.700ANODE



WGTMEMANOD101L101X 12.080 2.500 1.001.001.00GLOBCONC 2.700ANODE WGTMEMANOD103L102X 6.040 2.500 1.001.001.00GLOBCONC 2.700ANODE WGTMEMANOD103L102X 12.080 2.500 1.001.001.00GLOBCONC 2.700ANODE WGTJT LPAD 2.000PADEYE 501L 7.849 1.0001.0001.000 WGTJT LPAD 2.000PADEYE 502L 7.849 1.0001.0001.000 WGTJT LPAD 2.000PADEYE 503L 7.849 1.0001.0001.000 WGTJT LPAD 2.000PADEYE 504L 7.849 1.0001.0001.000 WGTMEMWKWY401L4101 1.500 1.5001.001.001.00GLOBUNIF 1.500WLKWAY WGTMEMWKWY4101402L 1.500 1.5001.001.001.00GLOBUNIF 1.500WLKWAY WGTMEMWKWY401L4103 1.500 1.5001.001.001.00GLOBUNIF 1.500WLKWAY ------------------------------------------------------------------------------------------------------------- Section 13 Deck Loads To create inertia loads from various weights defined on deck structure three steps need to be performed: Step 1 Define the center of the acceleration: Go to Weight> Center of Roll, and define center ID CEN1 at (0.0, 0.0, 0.0) location. Then select Apply



Step 2 Define the accelerations: Use Environmental> Loading> Weight: Check off Acceleration and define 1.0g in Z direction for load condition AREA, EQPT, LIVE and MISC. Picture on the right shows the sample of load case AREA.

Step 3 Use the weight groups to create the loads: Environmental> Loading> Weight: Check off Include weight group. select weight group AREA, EQPT, LIVE and MISC to be included in load case. Use Load condition AREA, EQPT, LIVE and MISC respectively. Note: EQPT, LIVE, and MISC will already have acceleration defined from above, but included weight group needs to be added also. The picture shows the load case AREA definition.

Save the model to Sacinp.dat_08 Weights defined on the jacket will be added to the environmental load conditions to account forthe possible buoyancy and possible wave loads. The added inertia load cases shall look like following: ------------------------------------------------------------------------------------------------------------- LOAD LOADCNAREA INCWGT AREA ACCEL 1.00000 N CEN1



LOADCNEQPT INCWGT EQPT ACCEL 1.00000 N CEN1 LOADCNLIVE INCWGT LIVE ACCEL 1.00000 N CEN1 LOADCNMISC INCWGT MISC ACCEL 1.00000 N CEN1 ------------------------------------------------------------------------------------------------------------- Section 14 Environmental Loading Step 1 Define drag and mass coefficients Use Environmental> Global Parameters> Drag/Mass Coefficient to define the data (Shown in the picture). Cd=0.6 and Cm=1.2 for both clean and fouled members. All the members have same Cd and Cm.

Step 2 Define marine growths Go to Environment>Global Parameters>Marine growth to enter the data shown in the picture on the right.

The added marine growth override lines shall look like following: ------------------------------------------------------------------------------------------------------------- MGROV MGROV 0.000 60.000 2.500 1.400 MGROV 60.000 79.500 5.000 1.400 ------------------------------------------------------------------------------------------------------------ Step 3 Hydrodynamic modeling



Go to Environment>Global Parameters>Member Group Overrides Override the jacket leg members with group ID LG1-LG3 That need to take into account the load increase due to the appurtenant structures like J-tubes and Risers. Highlight groups LG1-Lg3 that the overrides need to be added to. The picture on the right indicates that the drag and mass coefficients have been factored by 1.5 to account for the load increases.

The hydrodynamic model data should look like following: ------------------------------------------------------------------------------------------------------------- GRPOV GRPOV LG1 F 1.501.501.501.50 GRPOV LG1 F 1.501.501.501.50 GRPOV LG1 F 1.501.501.501.50 GRPOV LG2 F 1.501.501.501.50 GRPOV LG2 F 1.501.501.501.50 GRPOV LG2 F 1.501.501.501.50 GRPOV LG3 F 1.501.501.501.50 GRPOV LG3 F 1.501.501.501.50 GRPOV LG3 F 1.501.501.501.50 GRPOVAL PL1NN 0.001 0.001 0.001 GRPOVAL PL2NN 0.001 0.001 0.001 GRPOVAL PL3NN 0.001 0.001 0.001 GRPOVAL PL4NN 0.001 0.001 0.001 GRPOV W.BNF 0.001 0.001 0.001 0.001 0.001 ------------------------------------------------------------------------------------------------------------- Step 4 Environmental loading Operating Storm (three directions considered: 0.00, 45.00, 90.00): load case P000, P045, P090 Jacket weight groups ANOD and WKWY should be included in all three load cases by using Environment > Loading > Weight > Include Weight Group to account for weight, buoyancy and wave/current loads. Go to Environment> Loading> Seastate to define the wave, current, wind and dead/buoyancy load parameters. The data can be found in the design specification, and the pictures below show the details of load case P000.



The 3 operating storm load case lines shall look like following: ------------------------------------------------------------------------------------------------------------- LOADCNP000 INCWGT ANODWKWY WAVE WAVE1.00STRE 6.10 12.00 0.00 D 20.00 18MS10 1 WIND WIND D 25.720 0.00 AP08 CURR CURR 0.000 0.514 0.000 -5.000BC LN CURR 79.500 1.029 DEAD DEAD -Z M BML LOADCNP045 INCWGT ANODWKWY WAVE WAVE1.00STRE 6.10 12.00 45.00 D 20.00 18MS10 1 WIND WIND D 25.720 45.00 AP08 CURR CURR 0.000 0.514 45.000 -5.000BC LN CURR 79.500 1.029 DEAD DEAD -Z M BML LOADCNP090 INCWGT ANODWKWY WAVE WAVE1.00STRE 6.10 12.00 90.00 D 20.00 18MS10 1 WIND WIND D 25.720 90.00 AP08 CURR CURR 0.000 0.514 90.000 -5.000BC LN CURR 79.500 1.029 DEAD DEAD -Z M BML



------------------------------------------------------------------------------------------------------------- Extreme Storm (three directions considered: 0.00, 45.00, 90.00): load case S000, S045 andS090 Extreme storm load cases can be defined similar as the operating storm load cases, except 100-year storm criteria are used to generate the environmental forces. Jacket weight groups ANOD and WKWY should be included in all three load cases. The water depth should be overridden to consider the high tide. The following pictures show the detailed input data from the Specification.



The 3 extreme storm load case lines shall look like following: ------------------------------------------------------------------------------------------------------------- LOADCNS000 INCWGT ANODWKWY WAVE WAVE1.00STRE 12.19 81.00 15.00 0.00 D 20.00 18MS10 1 WIND WIND D 45.170 0.00 AP08



CURR CURR 0.000 0.514 0.000 -5.000BC LN CURR 81.000 1.801 DEAD DEAD -Z 81.000 M BML LOADCNS045 INCWGT ANODWKWY WAVE WAVE1.00STRE 12.19 81.00 15.00 45.00 D 20.00 18MS10 1 WIND WIND D 45.170 45.00 AP08 DEAD DEAD -Z 81.000 M BML CURR CURR 0.000 0.514 45.000 -5.000BC LN CURR 81.000 1.801 45.000 LOADCNS090 INCWGT ANODWKWY WAVE WAVE1.00STRE 12.19 81.00 15.00 90.00 D 20.00 18MS10 1 WIND WIND D 45.170 90.00 AP08 CURR CURR 0.000 0.514 90.000 -5.000BC LN CURR 81.000 1.801 90.000 DEAD DEAD -Z 81.000 M BML ------------------------------------------------------------------------------------------------------------- Section 15 Load combination and code check options Step 1 Load combination Six load combinations OPR1, OPR2, OPR3, STM1, STM2 and STM3 will be added into the model. Three of them are corresponding to operating storms and the other three are corresponding to extreme storms. Load factor of 1.1 will be used for environmental loads. The live load will be included with a factor of 0.75 in extreme storm load combinations. Go to Load>Combine load conditions to define the load combinations. The following two pictures show the combinations of operating and extreme storm conditions.



The load combination lines shall look like following: ------------------------------------------------------------------------------------------------------------- LCOMB LCOMB OPR1 AREA1.0000EQPT1.0000LIVE1.0000MISC1.0000P0001.1000 LCOMB ORP2 AREA1.0000EQPT1.0000LIVE1.0000MISC1.0000P0451.1000 LCOMB ORP3 AREA1.0000EQPT1.0000LIVE1.0000MISC1.0000P0901.1000 LCOMB STM1 AREA1.0000EQPT1.0000LIVE0.7500MISC1.0000S0001.1000 LCOMB STM2 AREA1.0000EQPT1.0000LIVE0.7500MISC1.0000S0451.1000 LCOMB STM3 AREA1.0000EQPT1.0000LIVE0.7500MISC1.0000S0901.1000 ------------------------------------------------------------------------------------------------------------- Step 2 Analysis load case selection Go to Options> Load condition selection to select all the load combinations to analyze and report. The picture on the right shows the input.

Step 3 Allowable stress modification factor (AMOD) Allowables can be increased by 1/3 based on API code, and this should be entered using the AMOD line. Go to Options > Allowable stress/Mat Factor and enter the data as shown in the picture below.

Add unity check partition line (UCPART). Go to Options>Unity Check Ranges and enter the data as shown in the picture below.



The LCSEL, UCPART and AMOD lines shall look like following: ------------------------------------------------------------------------------------------------------------- LCSEL ST OPR1 ORP2 ORP3 STM1 STM2 STM3 UCPART 0.5000.5001.0001.000300.0 AMOD AMOD STM1 1.330STM2 1.330STM3 1.330 ------------------------------------------------------------------------------------------------------------- Save the model to Sacinp.dat_09


Linear Static Analysis - 1

Linear Static Analysis

Section 1 Create the static analysis directory and separate the model file. Step 1 Create the directory for static analysis Under Training Project, create Static subdirectory; copy sacinp.dat_09 to the directory, and make this directory current. Step 2 Separate the model Open sacinp.dat_09 with Precede and then go to File/Save As and select Model data only, and click-on OK to save the model file to sacinp.dat. See picture below.

Step 3 Separate the Environmental load Go to File/Save As and select Seastate data only, click on OK to save the separated seastate input file to seainp.dat. See picture below.



Section 2 Create a Joint Can input file Step 1 Using Datagen to create file Click on datagen and select to create a new file. Then click on Joint Can and click select. See picture to right. Under Joint Can Options select API. Select R for Allowable Limit. Minimum gap allowed should be 5 cm. Leave the rest as default. Under Reports tab select max as UC Order and Joint Can Output Report Options. See pictures below.

Save as jcninp.inp Joint Can File will appear as the following: ------------------------------------------------------------------------------------------------------------------- JCNOPT API MN 5. C NID MAMX END ------------------------------------------------------------------------------------------------------------------- Section 3 Create the static analysis run file Step 1 Select the analysis type and sub-type Click on Analysis Generator from the Executive window and select Static for Type and Basic Static Analysis for Subtype. See below picture for details.



Step 2 Select the Seastate analysis option Check and click on Edit Environmental Loading Options to active the Seastate program and get the Seastate Analysis Options shown on right. Select the option to match the definition in the picture below. Click on O.K to save the option.



Step 3 Select member code check option Click on Edit Element Check Options to get the code check option window and set the options Detailed as following: Use Post input file: No Code criteria: API 21st edition Stress/code check location: 2/2 Report option: Override the model Following report should be turned on: Joint deflection Joint reaction Member end forces UC range Click on OK to save the options.

Step 4 Select Tubular Joint Check Options Check and click on Edit Tubular Joint Check Options to get the tubular joint check window shown below. For joint can input file select jcninp.inp file. See Picture.



Section 4 Run the analysis and review the results Step 1 Define/change the result file extension name Change the file ID to DAT and click on ID icon to apply. Step 2 Select model input file, the model file is saved in step 2 of Section 1. Step 3 Select or check the Seastate input file. Step 4 Select or check the Joint Can input file Step 5 Run the analysis. See below picture for the location of above options.



Step 6 Check results.

Type in or select the file ID here

Click here to apply

Click here to run the analysis

Check here for the file extension change Click here to select

model input file


Static analysis with PSI- 1

Static Analysis with Non-Linear Foundation

Section 1 Create a PSI input data file

Step 1 Create a new folder and name it Static PSI, and then make it the current folder.

Copy SACINP.DAT and SEAINP.DAT files from Static directory to current folder.

Step 2 Create PSI input data file

Click-on Data file icon to launch Datagen program, and select Create new data file and click-on OK to get the second window pop-up, as shown below; select Pile Soil Interaction as the analysis type and make sure the unit is Metric KN. Click-on Select and skip the Title and get next step to define the analysis options..

Step 3 Define analysis options

Leave default options for both General and Output Options, and click Next.



Step 4 Select the results to plot

Click-on No to LCSEL and PILSUP cards. Click on Yes to PLTRQ card to get Plot Option window and select the options shown below.

Click-on Next and select Include all piles in plot, select all load cases to be plotted. Do not define plot size and specify pile section data until get Pile Group definition.

Step 5 Define pile group

Define two pile groups and one conductor group, the pile group ID =PL1 and PL2; conductor group ID =CND. The first pile group segment length is 10m and second segment has length of 30m with available end bearing area of 0.656m^2.



Click-on More to add the segments or groups, and click-on Next to finish the pile group definition.

Step 6 Define the piles

Define the pile head joint, batter joint, pile group ID and soil ID as shown in following picture for the four piles, and repeat to define conductors.

Click-on More to add a pile and click-on Next to finish the pile definition and get to next step.

Clickheretoaddmoregroups Clickheretogettonext



Step 7 Define T-Z data type

The picture on right shows the type of axial data can be defined in SACS system. The data for the training is T-Z data. Select User Defined T-Z Curves and click-on Next to get next step.

Step 8 Define T-Z axial header data

The header data defines the total number of soil strata, Z-factor, Soil ID and the maximum data point of any T-Z curves. The data should be got from the Design Specification for this training, and is shown in following picture.

Click-on next to get to next step.

Step 9 Define T-Z soil stratum data



This step defines the soil stratum information followed by soil data of each stratum (Step 10), the data needs to be defined is number of point of the curve, stratum location and T factors; following picture shows the stratum definition of the top soil.

Step 10 Define the soil data of the stratum

The data is from the spec document, the picture on right shows the soil at 0.0m location.

Repeat Step 9 and 10 to enter all 8 soil T-Z curves.

Step 11 Define end bearing data

The picture below will show up when finish the step 10. Click-on Yes to enter the Q-Z axial header data.



Define the Q-T axial header data shown in below picture, click-on Next to accept the data and get to soil stratum data.

Define the soil stratum data as shown in following two pictures and repeat it for all the stratums.

Step 12 Torsional data

The torsional stiffness of the soil can be defined as linear spring, following two pictures gives the detail of the input.

Step 13 P-Y data input



The P-Y data input is similar to Axial T-Z data, follow the direction of Step 7 to 10 and get the data from the soil report to finish the input.

Following two pictures show the soil type selection and P-Y header definition.

Following two pictures show the stratum and soil data definition at 0.0m location, repeat the input to define all the P-Y soils at rest locations.

Save the file and name it PSIINP.DAT.

Section 2 Static analysis with PSI

Your current directory should have three input files: SEAINP.DAT containing the loading condition, SACINP.DAT containing the model information includes the weight definition and PSIINP.DAT containing the pile model information.

Step 1 Select analysis type and options

File ID: dat

Analysis type: Static



Analysis subtype: Static analysis with Pile/Soil Interaction

Analysis options: selections are shown in the picture below

Step 2 Edit analysis options

Click-on to get the window shown below and make selections as shown in the window, click-on OK when finish; Click-on to define the code option shown in below window on right: Code option: API RP 2A 21th edition/AISC 9th edition

Segment to be checked: 2 for both segmented and non-segmented member

Override the report to include Joint deflection, Joint reaction, Member end forces and the UC range report.



Step 3 Define input files and run the analysis

Select the input files as shown in below window and check the output file names, click-on Run Analysis Tab to run the analysis.



Section 3 Check the analysis results

Member code check results can be checked from post listing file or Postvue database, see below.

---------------------------------------------------------------------------------------------------------------

PSI SAMPLE ANALYSIS DATE 12-FEB-2011 TIME 16:10:54 PST PAGE 158

SACS-IV MEMBER UNITY CHECK RANGE SUMMARY

GROUP III - UNITY CHECKS GREATER THAN 1.00 AND LESS THAN*****

MAXIMUM LOAD DIST AXIAL BENDING STRESS SHEAR FORCE SECOND-HIGHEST THIRD-HIGHEST

MEMBER GROUP COMBINED COND FROM STRESS Y Z FY FZ KLY/RY KLZ/RZ UNITY LOAD UNITY LOAD

ID UNITY CK NO. END N/MM2 N/MM2 N/MM2 KN KN CHECK COND CHECK COND

102P-202P PL1 1.438 STM1 0.0 -77.40 -114.13 111.13 -144.24 165.19 81.9 81.9 0.694 STM2 0.632 STM3

103P-203P PL1 1.396 STM3 0.0 -84.84 -134.10 13.98 -18.21 187.41 81.5 81.5 0.751 STM2 0.733 STM1

104P-204P PL1 1.636 STM2 0.0 -97.92 -140.61 -12.02 15.35 199.60 81.9 81.9 1.454 STM1 1.179 STM3

803L-8104 W01 1.065 OPR3 0.0 -5.42 -137.51 15.34 -5.14 230.24 18.9 64.6 1.002 OPR2 0.948 OPR1

804L-83FD W01 1.215 OPR3 0.0 0.01 -173.57 8.95 -3.79 241.85 18.9 64.6 1.189 OPR2 1.150 OPR1

8102-8103 W01 1.083 OPR3 5.0 -4.86 146.66 -7.75 -0.03 160.83 18.9 64.6 1.078 OPR2 1.077 OPR1

8103-802L W01 1.633 OPR1 5.0 -5.18 -221.15 -14.97 -5.99 -503.52 18.9 64.6 1.557 OPR2 1.489 OPR3

8104-8105 W01 1.327 OPR3 5.0 -5.42 182.97 -7.23 0.08 204.19 18.9 64.6 1.302 OPR2 1.280 OPR1

8105-804L W01 1.902 OPR1 5.0 -5.29 -265.76 -8.28 -3.11 -609.48 18.9 64.6 1.863 OPR2 1.821 OPR3

802L-804L W02 1.758 OPR3 10.0 -2.24 -178.44 -6.55 -1.14 -606.56 38.5 132.5 1.724 OPR2 1.613 OPR1

---------------------------------------------------------------------------------------------------------------



Pile check results are listed in psi listing file.

---------------------------------------------------------------------------------------------------------------

PSI SAMPLE ANALYSIS DATE 12-FEB-2011 TIME 16:10:51 PSI PAGE 465

PSI SAMPLE ANALYSIS

* * * P I L E M A X I M U M U N I T Y C H E C K S U M M A R Y * * *

PILE GRUP LOAD ******* PILEHEAD FORCES ******* * PILEHEAD DISPLACEMENTS * *********** STRESSES AT MAX. UNITY CHECK ************

JT. CASE AXIAL LATERAL MOMENT AXIAL LATERAL ROTATION DEPTH AXIAL FBY FBZ SHEAR COMB. UNITY

KN KN KN-M CM CM RAD M ---------------- N/MM2 ------------- CHECK

101P PL1 OPR1 -2045.22 173.63 386.2 0.16 1.90 0.001688 0.0 -25.00 18.47 -1.67 4.22 -43.54 0.268 OPR2 -1233.30 196.10 430.6 0.10 2.18 0.001947 10.4 -9.24 -26.42 -0.09 1.11 -35.66 0.219 OPR3 -2139.58 289.73 730.6 0.16 3.44 0.002927 0.0 -26.15 35.07 1.07 7.13 -61.23 0.365 STM1 3125.92 886.34 4514.2 -0.23 30.98 0.014261 0.0 38.20 216.77 2.46 20.44 254.99 1.071 STM2 5852.36 841.32 3848.9 -0.43 24.92 0.012223 0.0 71.52 184.68 7.58 18.66 256.36 1.110 STM3 2729.80 811.41 3849.2 -0.20 23.74 0.011847 0.0 33.36 184.85 0.85 18.91 218.21 0.917 102P PL2 OPR1 -4660.75 156.22 375.3 0.35 1.70 0.001471 0.0 -56.96 17.99 -1.04 3.89 -74.98 0.480 OPR2 -2774.74 183.64 411.1 0.21 2.04 0.001816 0.0 -33.91 19.71 -1.03 4.51 -53.65 0.334 OPR3 -703.99 263.77 615.9 0.06 3.11 0.002723 10.4 -5.38 -37.39 -0.04 1.52 -42.77 0.257 STM1 -9529.89 792.77 4871.0 0.71 30.61 0.015049 0.0 -116.47 233.62 -11.84 22.86 -350.39 1.536 STM2 -3152.27 775.31 3967.1 0.24 24.19 0.012492 0.0 -38.53 190.50 -2.44 19.83 -229.04 0.966 STM3 3864.15 793.62 3584.8 -0.28 21.89 0.011275 0.0 47.23 172.13 2.72 18.20 219.38 0.936

103P PL1 OPR1 -1876.81 176.84 395.9 0.14 1.93 0.001709 0.0 -22.94 -18.91 -1.95 4.30 -41.95 0.256 OPR2 -3830.00 198.40 499.9 0.29 2.14 0.001790 0.0 -46.81 -23.97 -1.22 4.91 -70.81 0.444 OPR3 -5919.23 255.29 688.1 0.44 2.95 0.002458 0.0 -72.34 -33.01 1.48 6.50 -105.39 0.664 STM1 3287.87 888.94 4526.0 -0.24 31.12 0.014285 0.0 40.18 -217.34 2.02 20.44 257.54 1.083 STM2 -3354.38 801.30 4291.3 0.25 26.45 0.013078 0.0 -41.00 -206.01 -5.25 20.58 -247.07 1.042 STM3 -10445.87 724.51 4122.7 0.78 23.08 0.012172 0.0 -127.66 -197.98 0.60 20.79 -325.65 1.446 104P PL2 OPR1 -4773.04 159.44 384.3 0.36 1.74 0.001498 0.0 -58.33 -18.43 -0.99 3.97 -76.79 0.491 OPR2 -5510.91 164.94 420.3 0.41 1.76 0.001470 0.0 -67.35 -20.18 0.18 4.13 -87.54 0.561 OPR3 -4560.62 249.15 641.6 0.34 2.89 0.002458 0.0 -55.74 30.72 -2.29 6.26 -86.55 0.540 STM1 -9635.55 793.07 4892.1 0.72 30.75 0.015100 0.0 -117.76 -234.65 -11.59 22.92 -352.69 1.546



STM2 -12057.11 724.89 4315.2 0.90 24.80 0.013054 0.0 -147.36 -207.23 -1.10 21.56 -354.59 1.583 STM3 -8787.05 717.25 3853.9 0.66 21.46 0.011596 0.0 -107.39 184.87 -8.78 19.98 -292.47 1.292 PSI SAMPLE ANALYSIS DATE 12-FEB-2011 TIME 16:10:51 PSI PAGE 480 * * * P I L E M A X I M U M A X I A L C A P A C I T Y S U M M A R Y * * * PILE GRP ********* PILE ********* ************** COMPRESSION ************* **************** TENSION *************** JT PILEHEAD WEIGHT PEN. CAPACITY MAX. CRITICAL CONDITION CAPACITY MAX. CRITICAL CONDITION *MAXIMUM* O.D. THK. (INCL. WT) LOAD LOAD LOAD SAFETY (INCL. WT) LOAD LOAD LOAD SAFETY UNITY LOAD CM CM KN M KN KN KN CASE FACTOR KN KN KN CASE FACTOR CHECK CASE 101P PL1 106.68 2.50 177.4 40.0 -57792.1 -2139.6 -2139.6 OPR3 27.01 58144.3 5852.4 5852.4 STM2 9.94 0.15 STM2 102P PL2 106.68 2.50 177.4 40.0 -57772.9 -9529.9 -9529.9 STM1 6.06 58125.1 3864.2 3864.2 STM3 15.04 0.25 STM1 103P PL1 106.68 2.50 177.4 40.0 -57792.1 -10445.9 -10445.9 STM3 5.53 58144.3 3287.9 3287.9 STM1 17.68 0.27 STM3 104P PL2 106.68 2.50 177.4 40.0 -57772.9 -12057.1 -12057.1 STM2 4.79 58125.1 0.0 0.0 OPR1 100.00 0.31 STM2 ---------------------------------------------------------------------------------------------------------------


Ship Impact Analysis - 1

Ship Impact Analysis Section 1 Create a ship impact analysis directory and a collapse input file Step 1 Create the directory for ship impact analysis Under Training Project, create Ship Impact subdirectory; copy the model file sacinp.dat, seastate input file seainp.dat, and psi input file psiinp.dat to the directory, and make this directory current. Step 2 Modify model file and seastate input file for collapse analysis Modify the model file: Divide the member 402L-304X by add a joint IMPC at Z = -5.0 m; Add load case SHIP w load ID SHIPIMPC: apply a 100.0 kN concentrated load at joint IMPC in

the ()X direction.

Modify the seastate input file: Delete LCSEL and AMOD lines; Delete all operating storm load cases and extreme storm load case P000~P090 and S000~S090; Delete all load combinations; Add DEAD load condition with selected weight groups for ANOD and WKWY.



Step 3 Create the collapse input file CLPINP.CLP The unit of the collapse input file: There is no place to define the unit for the collapse input file. The program will use the same unit as whatever defined in the structural model file. Collapse options: Member segments 8 will be chosen along with 80 iterations allowed for both load increment and

member iterations; Member local buckling check with API Bulletin LRFD method will be included; Joint flexibility and joint strength will be included; Pile plasticity will be included; Collapse maximum deflection = 500 cm will be used with .005 strain hardening ratio.

Collapse analysis report selections: Joint deflections and member stresses will be printed out in the listing file for each load

increment by selecting P1 for joint deflection print option and M1 fore member stress print option;

Collapse and member summary report will be included in the output listing file. Define load sequence: One Load sequence AAAA defined for applying vertical loads and then ship impact loads; Load case DEAD, EQPT, MISC, AREA will be added in one step; Load case SHIP will be added in 50 steps for load factor of 50.0.

Elastic member groups can be defined using GRPELA line for member groups W01, W02, DL6, DL7, DUM, and W.B.

Define the ship impact loads and energy: Add an IMPACT line to define 1) the ship impact joint is IMPC: 2) the impact load case is SHIP;

3) member denting is calculated per Ellinas formula and the member dent B ratio is 8. Add an ENERGY line to define the ship mass and velocity: Ship mass is 1100 tones with an

added mass coefficient of 1.4, and ship velocity is 1.2m/sec. Collapse program will calculate the ship impact energy per API RP 2A Section C18.9.2a.

Collapse input file defined shall looks like following: ------------------------------------------------------------------------------------------------------------- CLPOPT 80 8 80 LBJFPPJS LR 0.100.001 0.01 500. .005 CLPRPT P1 M1 SMMS LDSEQ AAAA DEAD 1 1.00EQPT 1 1.0MISC 1 1.0 LDSEQ AREA 1 1.00LIVE 1 0.75SHIM 50 50.0 GRPELA W01 W02 DL6 DL7 DUM W.B IMPACT SHIP IMPC EX E 402L IMPC 8. ENERGY 1100. 1.4 1.2 END -------------------------------------------------------------------------------------------------------------



Section 2 Create the collapse analysis run file Step 1 Select analysis type and sub-type Click Analysis Generator from Executive window and select Statics for Type and Full Plastic Collapse/Pushove for Subtype. The file Id of clp is chosen in the analysis. Step 2 Select Analysis Options Check options for Environmental Loading, Solve, Foundation, and Non-Linear / Plastic.

Step 3 Select input files See below picture for the selected options:

Section 3 Run the analysis and review the results Check the results from collapse view:



After a collapse analysis is finished, a collapse view file clprst.clp will be created. Double click the file name, collapse view program will open the file and many results can be checked on the screen. Several reports, such as analysis history report, joint report, member report, and work done report can be generated. Collapse view also can show the structural damage graphically, see the following pictures.

The parts of results also can be viewed by graphic curves. Select the Total Energy Absorbed by structure as the output parameter for X axis, the load step as the output parameter for Y axis, and omit the final load increment from the graph, see the followings.



The curve is shown as below.

Check collapse output listing file: The listing file reports the selected outputs, such as joint deflections and member stresses. It also includes the total ship impact energy, and the energy absorbed by structure at each load increment. Listing file also indicates the structure damages.



The following are parts of the listing file. ----------------------------------------------------------------------------------------------------------------------- SHIP IMPACT SETTINGS 1. Impact energy calculated from ENERGY line: 1.11 (MJ) 2. Impact load condition: SHIM 3. Indentation joint: IMPC 4. Impact force X : -0.1000 (MN) Y : 0.0000 (MN) Z : 0.0000 (MN) 5. Ship indentation curve: (none specified) 6. Automatic unloading: OFF 7. Member for which denting energy is calculated :402L-IMPC 8. Denting energy calculated using Ellinas formula . . ** SACS COLLAPSE IMPACT ENERGY ABSORPTION ** INCREMENT 25 LOAD FACTOR 20.000 Aggregate Incremental (MJ) (MJ) Energy absorbed by structure = 0.8649 0.3358 Energy absorbed by member = 0.0485 0.0000 * Limited by B ratio Total absorbed impact energy = 0.9134 0.3358 % of total energy absorbed = 82.3693 (%) 30.2828 (%) Member indentation = 0.0572 (M) 0.0000 (M) *** PLASTICITY OCCURRED ON MEMBER 402L-404L AT LOAD STEP 25 *** PLASTICITY OCCURRED ON MEMBER 4100-404L AT LOAD STEP 25 *** PLASTICITY OCCURRED ON MEMBER 4101-402L AT LOAD STEP 25 **** WARNING - EXCEEDED MAXIMUM ALLOWED DISPLACEMENT OR ROTATION **** WARNING - STRUCTURE COLLAPSED ******** -----------------------------------------------------------------------------------------------------------------------

EngineeringDynamics,Inc. Training2011

ExtremeWaveResponse1

Extreme wave response

Get ready

1. Under Training Project create a Extreme wave response subdirectory 2. Under Extreme wave response create Foundation SE, Modes and Wave response

subdirectories. 3. Copy the Seastate file SEAINP.DAT, model file SACINP.DAT and soil data PSIINP.DAT

from \Static PSI directory to Extreme wave response directory. 4. Copy SEAINP.DAT from \Static PSI directory to Extreme wave response \Modes

directory 5. Copy Sacinp.dat from \Static PSI directory to Extreme wave response\wave response

directory 6. Copy jcninp.inp from \Static directory to Extreme wave response\wave response

directory 7. Set current directory to \Extreme wave response.

Section 1 Create pile head super element

Step 1 Check the model

1. Check if the weight combination MASS has been created. If not create the weight combination MASS with the basic weight groups MISC, EQPT, AREA, and LIVE. The weight factors should be 1.0

2. If the weight combination MASS already exists, check the weight factor for LIVE. If it is not 1.0 change it to 1.0.

3. Open seainp.dat file, and modify the file to contain only operating conditions a. Remove load combination STM1, STM2 and STM3 b. Modify LCSEL line to contain only OPR1, OPR2 and OPR3 load cases c. Remove AMOD lines d. Comments out Load Combination STM1, STM2 and STM3 e. Save the file

Step 2 Create the run file 1: Select analysis type

1. Change current directory to \Foundation SE 2. Analysis type: Static 3. Analysis subtype: Create Pilehead Super Element 4. The picture below shows the window after the analysis type is selected. Please check the

default File ID and if it is not dat change it to dat.



Step 3 Create the run file 2: Set Environmental Load Option

1. Check on Edit Environmental Loading Options and click to change the options 2. Change Seastate Input in Model file to No 3. Pick the ..\seainp.dat file in Seastate Input File field 4. See below picture for the window after options are defined. Click OK to save the

options.



Step 4 Create the run file 3: Set PSI option

1. Click Edit Foundation Options to define the analysis options for the pile head super element creation:

2. Pick ..\PSIINP.DAT file from PSI Input File field 3. Change Foundation Superelement Option to Override - Create Pilehead SE 4. Enter OPR1 and OPR3 to 1st X and 1st Y load cases respectively 5. Change Pilehead Load/Defl. Option to Max load and deflection 6. Keep other options unchanged 7. See below picture for the windows after the options are defined. Click OK to save

the options.

Step 5 Select the input file(s) and run the analysis

1. Pick the model file ..\SACINP.DAT in Input File field and Click-on Run Analysis to run the analysis. This analysis will create the dynsef.dat file and this is the pile head super element file needed for dynamic characteristic analysis.

2. See below picture for the Analysis Generator Window after the options are defined.



3. Click-on Run Analysis to run the analysis and check the results. The summary of results are shown below



Seastate basic load case summary report for spectral fatigue: ----------------------------------------------------------------------------------------------------------------------------------- ****** SEASTATE BASIC LOAD CASE SUMMARY ****** RELATIVE TO MUDLINE ELEVATION LOAD LOAD FX FY FZ MX MY MZ DEAD LOAD BUOYANCY CASE LABEL (KN) (KN) (KN) (KN-M) (KN-M) (KN-M) (KN) (KN) 1 AREA 0.00 0.00 -405.00 0.0 674.9 0.0 0.00 0.00 2 EQPT 0.00 0.00 -2379.69 1513.0 6004.1 0.0 0.00 0.00 3 LIVE 0.00 0.00 -2474.99 0.0 4499.6 0.0 0.00 0.00 4 MISC 0.00 0.00 -233.79 -737.3 1553.0 0.0 0.00 0.00 5 P000 1476.51 -0.03 -8581.62 1.6 90919.3 0.3 14131.80 5513.30 6 P045 1074.28 1096.02 -8595.18 -62958.2 67540.8 547.9 14131.80 5506.54 7 P090 -3.53 1553.57 -8624.70 -89766.7 6266.1 806.7 14131.80 5513.45 8 S000 4960.04 -0.13 -8362.77 7.6 285640.6 0.5 14131.80 5706.54 9 S045 3595.07 3661.21 -8399.70 -207524.7 208737.9 2139.7 14131.80 5707.80 10 S090 -15.76 5199.34 -8506.35 -296081.1 5851.1 2838.2 14131.80 5708.30 -------------------------------------------------------------------------------------------------------------------------------------

Seastate combined load case summary report for spectral fatigue: ----------------------------------------------------------------------------------------------------------------------------------- ***** SEASTATE COMBINED LOAD CASE SUMMARY ***** RELATIVE TO MUDLINE ELEVATION LOAD LOAD FX FY FZ MX MY MZ CASE LABEL (KN) (KN) (KN) (KN-M) (KN-M) (KN-M) 11 OPR1 1624.16 -0.04 -14933.25 777.5 112742.9 0.3 12 OPR2 1181.70 1205.62 -14948.17 -68478.4 87026.5 602.6 13 OPR3 -3.88 1708.93 -14980.63 -97967.7 19624.3 887.3 -------------------------------------------------------------------------------------------------------------------------------------

Pile head superelement created for joint 101P for spectral fatigue: ----------------------------------------------------------------------------------------------------------------------------------- *** PILEHEAD STIFFNESS FOR JOINT 101P *** UNITS - (KN,M) FOR SUPERELEMENT NO. 1 RX RY RZ DX DY DZ RX 0.557862E+06 -0.118292E+03 0.118292E+02 0.175698E+02 0.683788E+05 -0.683788E+04 RY -0.118292E+03 0.568122E+06 -0.563122E+05 -0.707156E+05 -0.173959E+02 0.173959E+01 RZ 0.118292E+02 -0.563122E+05 0.106312E+05 0.707157E+04 0.173959E+01 -0.173959E+00 DX 0.175698E+02 -0.707156E+05 0.707157E+04 0.154072E+05 0.826751E+01 -0.826751E+00 DY 0.683788E+05 -0.173959E+02 0.173959E+01 0.826751E+01 0.275135E+05 0.132169E+06 DZ -0.683788E+04 0.173959E+01 -0.173959E+00 -0.826751E+00 0.132169E+06 0.133599E+07 -------------------------------------------------------------------------------------------------------------------------------------



Section 2 Create the mode shape and mass files Change the current directory to Extreme wave response\Modes Step 1 Modify the seainp.dat file for dynamic characteristic analysis

1. Remove LCSEL lines 2. Remove AMOD lines 3. Remove HYDRO/HYDRO2 lines 4. Remove all the load cases and combinations 5. Change Cd/Cm value for fatigue condition 6. Add DYNMAS line to include weight combination MASS 7. Save As the file to Seainp.dyn and file should look like following:

------------------------------------------------------------------------------------------------------------- LDOPT NF+Z1.0280007.849000 -79.500 79.500GLOBMN FILE B CENTER CEN1 CDM CDM 2.50 .5 2.0 .8 2.0 CDM 250.00 .5 2.0 .8 2.0 MGROV MGROV 0.000 60.000 2.500 2.5400-4 1.400 MGROV 60.000 79.500 5.000 2.5400-4 1.400 GRPOV GRPOV LG1 F 1.501.501.501.50 GRPOV LG1 F 1.501.501.501.50 GRPOV LG1 F 1.501.501.501.50 GRPOV LG2 F 1.501.501.501.50 GRPOV LG2 F 1.501.501.501.50 GRPOV LG2 F 1.501.501.501.50 GRPOV LG3 F 1.501.501.501.50 GRPOV LG3 F 1.501.501.501.50 GRPOV LG3 F 1.501.501.501.50 GRPOVAL PL1NN 0.001 0.001 0.001 GRPOVAL PL2NN 0.001 0.001 0.001 GRPOVAL PL3NN 0.001 0.001 0.001 GRPOVAL PL4NN 0.001 0.001 0.001 GRPOV W.BNF 0.001 0.001 0.001 0.001 0.001 DYNMAS MASS LOAD END

----------------------------------------------------------------------------------------------------------- Step 2 Create the Dynpac input file (Use Datagen program)

1. In DYNOPT line select the following options: a. Number of modes: 50 b. Mass calculation option: CONS c. Added mass coefficient: 1.0 d. Leave other options default

2. In DYNOP2 line select the following weight contingency factors: a. Dynpac calculated structural mass: 1.0 b. SACS load mass: 1.0 (This doesnt apply to this training model) c. SACS IV included weight mass: 1.0



3. Below is the content of this input file 4. Save as dyninp.dyn

---------------------------------------------------------------------------------------------------------------------- DYNOPT +ZMN 50CONS7.84905 1.0 +X DYNOP2 1.0 1.0 1.0 END Step 3 Select the Retained Degrees of Freedoms

1. Change the directory to \Extreme wave response and open SACINP.DAT file with Precede to define the retained DOFs for each Plan:

2. Plan at -79.5: Retain X, Y, and Z translational DOF to joints 101L, 102L, 103L, 104L 1100, 1101, 1102, 1103, and 1104. The joint fixity of 2 means retained degree of freedom. Go to Joint/Fixities and select the above joints, then set new fixity to 222.

3. Repeat the same pattern to the Plan at -50.0, -21.0, and 2.0. 4. Plan at 15.3: Select joints 71BD, 7104, 71ED, 701L, 702L, 703L, 704L, 74BD, and 74ED.

Set the joint fixities to 222 5. Plan at 23.0: Set joint fixities 222 for 801L, 802L, 803L, 804L, 81BD, 81FD, 84FD, and

84BD. 6. Save the model file after user has defined the retained degree of freedoms.

Step 4 Run the analysis 1: Select analysis type

1. Change current directory to \Extreme wave response\Modes 2. Change File ID to dyn 3. Analysis type: Dynamic 4. Analysis Subtype: Extract Mode Shapes

Step 5 Run the analysis 2: Select environmental load option

1. Check Edit Environmental Loading Options and set the options 2. Set Seastate Input File In Model File to No 3. In Seastate Input File field pick Seainp.dyn 4. Leave other options unchanged and click-on OK. See picture below for details.



Step 6 Run analysis 3: Select Solve option to pick up pile head super element

1. Click Edit Solve Options to define analysis options 2. Change Include Super element file to Yes 3. In Super element file field pick pile heads super element file: this file is created in last

Section and should be located in \Extreme wave response\Foundation SE folder. 4. Leave other options unchanged and click-on OK. 5. See picture below.



Step 7 Run the analysis 4: Select Modal Extraction Options

1. Click on Edit Modal Extraction Options to define the options for dynpac 2. Option 1: Use dynpac input file

a. Make sure Use Dynpac Input file option is Yes b. In Dynpac Input File filed pick the dyninp.dyn . c. See picture below.

3. Option 2: User Analysis Options: a. Change Use Dynpac Input File option to No b. Number of Modes: 50 c. Leave other options unchanged and click on OK. d. See picture below.



Step 8 Run the analysis 5: Select Graphical output options

1. Check on Graphical Post Processing to create the Postvue database 2. Include Only Joint Displacements: Yes 3. Use OCI File as Model Input: No 4. Click on OK when finished. 5. See picture below.



Step 9 Run the analysis 7: Select the model file and run the analysis

1. In SACS Model File field pick SACINP.DAT file. This file is located in \Extreme wave response folder.

2. See picture below for details.



3. Click Run Analysis to run the analysis

Step 10 Check the results

1. Open Dynlst.dyn file to check the results. The summary is listed below. 2. Double click-on PSVDB.DYN folder to open the Postvue database. Go to Display/Shape to

view mode shapes graphically.



Dynpac weight summary report for spectral fatigue: ----------------------------------------------------------------------------------------------------------------------------------- ************* WEIGHT AND CENTER OF GRAVITY SUMMARY ************* ************ ITEM DESCRIPTION ************ ************** WEIGHT ************** ******** CENTER OF GRAVITY ******** X Y Z X Y Z KN KN KN M M M MEMBER ELEMENTS 13578.944 13578.944 13578.944 1.087 0.000 -33.155 MEMBER ELEMENT NORMAL ADDED MASS 8419.222 8348.488 2259.828 1.133 0.000 -54.331 FLOODED MEMBER ELEMENT ENTRAPPED FLUID 4599.347 4599.347 4599.347 0.615 0.000 -39.497 USER DEFINED WEIGHTS IN DYNPAC 5493.467 5493.467 5493.467 2.443 -0.159 22.121 ************ TOTAL ************ 32090.982 32020.248 25931.588 1.263 -0.027 -24.415 -------------------------------------------------------------------------------------------------------------------------------------

Dynpac first 10 modal periods and frequencies report for spectral fatigue: ----------------------------------------------------------------------------------------------------------------------------------- SACS IV-FREQUENCIES AND GENERALIZED MASS MODE FREQ.(CPS) GEN. MASS EIGENVALUE PERIOD(SECS) 1 0.351679 9.6068325E+02 2.0480859E-01 2.8435048 2 0.409671 6.3659168E+02 1.5092797E-01 2.4409830 3 0.644671 3.7780218E+02 6.0948721E-02 1.5511799 4 0.734067 1.1268858E+03 4.7007686E-02 1.3622735 5 0.787909 4.6873639E+02 4.0802655E-02 1.2691825 6 0.983778 1.6494253E+03 2.6172574E-02 1.0164900 7 1.260474 2.7890749E+02 1.5943101E-02 0.7933526 8 1.484429 1.1532678E+03 1.1495324E-02 0.6736596 9 1.517697 1.0385447E+03 1.0996888E-02 0.6588928 10 1.725554 1.0121775E+02 8.5071294E-03 0.5795240 -------------------------------------------------------------------------------------------------------------------------------------



Section 3 Extreme wave response Step 1 Define analysis type

1. Change current directory to \Wave response 2. Change File ID to Dat 3. Analysis type: Dynamic 4. Subtype: Extreme wave 5. Check-on Foundation, Element Check, Tubular Joint Check and Graphical Processing

from Analysis Options window. Step 2 Edit environmental loading options

1. Seastate input in model file: No 2. Seastate input file: \seainp.dat 3. Make load combinations basic: Yes 4. Leave others unchanged and hit OK, see picture below

Step 3 Edit Dynamic wave options

1. Use wave response input file: No 2. Percent damping: 5.0 3. Number of Iteration: 10 4. Number of modes: 20 5. Plot base shear/overturning moment: Yes 6. Keep other unchanges and hit O.K



7. See below picture for details

Step 4 Edit Foundation options

1. PSI input file: \psiinp.dat 2. Leave other option unchanged and click-on O.K, See below for details:



Step 5 Edit element check options

1. Use Post Input file: No 2. Code Criteria: WSD AICS 9th/API 21st 3. Cb method: Calculate Cb based on end moments 4. Cm method: Include Moment Magnification 5. Redesign option: No 6. Stress/code check locations:

a. Non-segmented elements: 4 b. Segmented elements: 2

7. Report option: a. Joint Deflection: Yes b. Element details: Yes c. End forces: Yes d. UC Ranges: Yes

8. Keep other options unchanged and click-on O.K, see below picture for details.

Step 6 Edit Tubular check options

1. Use joint can input file: Yes 2. Joint Can input file: Jcninp.dat 3. Click-on OK



Step 7 Select input files

1. SACS Model file: \sacinp.dat 2. Dynpac mode shape file: \Modes\dynmod.dyn 3. Dynpac mass file: |Modes\dynmas.dyn 4. Click-on Run Analysis to run, seen below picture



Step 8 Check results

1. Check base shear/overturning moment response curves for dynamic effect 2. Check Wave response results and compare with the loads used for the pile head super

element 3. Check PSI results 4. Check Member code check results 5. Check Joint Can Code check results


Tow Fatigue - 1

Tow Fatigue Get Ready

1. Under Training Project directory create a sub-directory and name it to Tow Fatigue 2. Copy SACINP.DAT model file from Spectral Fatigue directory to Tow Fatigue directory.

Section 1 Modifying Model file Step 1 Modify the structure and only leave the jacket structure in the model file Delete all structural members above EL (+) 3.0, keep joints 501L, 502L, 503L, and504L. Delete all piles, conductors, w.b and dummy members in conductor framing. Use Misc/Check Model to check the model and delete unused joints and member groups and sections. Step 2 Modify the applied weights Delete weight group EQPT from DataGen. Only leave weight group ANOD, WKWY, and LPAD in the model. Step 3 Rotate the structure and add transportation support cans Use Display/Zoom Box/Translate and Rotate to rotate the structure around Row 1 (-) 90 degrees. The type of translate and rotate is About a Line, the selection criteria is All, click Apply to rotate the structure, then move the structure up with Z = 81.25 m and in X direction with X = 7.5 m, see the following pictures.

The structure now is in a horizontal position.


Tow Fatigue - 2

Add joints S111, S113, S121, S123, S131, S133, S141, and S143 1.75m below the joints 101L, 103L, 201L, 203, 301L, 303L, 401L, and 403L. The fixities of added joints are 111000. Add members with group name of CAN to connect the joints S111 to 101L, S113 to 103L, S121 to 201L, S123 to 203L, S131 to 301L, S133 to 303L, S141 to 401L, and S143 to 403L; Define the group property as OD = 30 and WTHK = 1.0; Input the member offset as Z = -61.60 cm at the top of the member. The revised jacket structure is shown as below.

Section 2 Create a Tow Input file and Perform the Tow Analysis Step 1 Create a file containing RAOs Eight (8) direction RAOs will be input at center of motion X = -38.00 m, Y = 0.25 m and Z = 0.0 m. There RAOs are corresponding to direction 000, 045, 090, 135, 180, 225, 270 and 315. The part of added RAO lines is shown below: ------------------------------------------------------------------------------------------------------------- RAO HEAD -38.0 0.25 0.00 R000 DP RAO DP40.0 0.798-90.5 0.008-1.6 0.32 6.42 0.0130.02 0.367-84.6 0.03398.7


Tow Fatigue - 3

RAO DP39.0 0.796-90.4 0.006-2.4 0.3186.58 0.013-1.07 0.348-85.4 0.03397.8 RAO DP 6.0 0.025-68.1 -70.0 -56.1 -71.5 0.016-65.9 0.003113.0 RAO DP 5.0 0.007-7.08 -7.9 175.0 -9.95 0.007-6.25 173.0 RAO HEAD 45.

Structural Modeling

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