Assoc. Prof. Dr. Yavuz YARDIM · Change load case type as moving load Then click on add to apply...

Assoc. Prof. Dr. Yavuz YARDIM


Then click OK three times to close windows

Now we define the Layout

Next step will defining deck section

�Go to bridge

�Deck section

�Add new deck section

�Choose steel and concrete deck section ( Steel girder)

Now we have default section

we need to change girder section which is FSEC1


We need to change girder section which is

FSEC1

Go to frame section ( previous slight )

Import new section

Select wide section

From the file we select “ AISC3.pro”

Select w36x230

Click ok

Select girder as w36x230

Change number of girder to the 4

Change total width to 36 ft.

Click ok ( check next slight)

Here section is up to us W 36x230 is given that

is why we select that

If it is not given we can select a range of

available section and program will find

optimum itself .


Now we define diaphragms

�Go to bridge

�Diaphragms

�Add new diaphragm

�Select chord and brace

It is steel girder that is why we have to

select this for bracing this give us more

sound bridge

Include top chord press “+ “

Import new Properties

Select wide section

From the file we select “ AISC3.pro”

Select w8x10

Click ok

Select girder as w8x10 for all ( check the figure

in this slight)

Click ok two times


Now we define Bearings

�Go to bridge

�Bearings

�Add new Bearings

�Select bearing as shown in fig


Now we define foundation

�Go to bridge

�Foundation spring

�Add new Foundation spring

�Set the windows as in fig.


Now we define Abutments

Before we define abutment we have to

define frame section for abutment

�Go to define

�Section –> frame section

�Add new property

�Select concrete � rectangular

section

� depth 4 width 2 ft

�Change the name as abutment 4x2

�Then click ok and ok

�Go to bridge

�abutment

�Add new Abutment

�Set name as Abutment


Abutments

�Set windows as in figure

�Click ok two times and reach main

window


Now we define bent

Before we define bent we have to define

frame section for bent

�Go to define

�Section –> frame section

�Add new property

�Select concrete � circular section

� Diameter 2 ft

�Change the name as Column 2

�Then click ok

�Add new property

�Select concrete � circular section

� Depth 4 width 2

�Change the name as BentCap4x2

�Then click ok and ok

�Go to bridge

�bent

�Add new Bents

�Set windows as in fig Assoc. Prof. Dr. Yavuz YARDIM

Press modify/show column data

�Set windows as in figure

�Click ok and ok and ok


Now we define Bridge Object

This option will combine all predefined

bridge member in to a bridge structure

�Go to Bridge

�Bridge object

�Add new bridge Object

�Select span �

�start abutment 1000ft

�Press modify

�Click span end abutment

� end span 1100

�Press modify

�Type 1050 to station and press add

to add intimidate span (span1 )

�Be sure windows is set like in fig

�DON’T Click ok


Bridge Object

�Select Abutment �

�Press modify and show

�Press modify see fig

�Select BDIA1 from diaphragm ( this is

the diaphragm we define before in

slight 11)

� we have to define elevation of

abutment from top of the deck from

substructure location elevation ( global

Z) is -4.2417

�From bearing Assignment

�Elevation at layout line (Global Z) is

3.7417 ( 5 in. less than elevation (

global Z) ) see fig 2

�select end Abutment

�Select BDIA1 for diaphragm

�we have to define elevation of

abutment from top of the deck from

substructure location elevation ( global

Z) is -4.2417


�Elevation at layout line (Global Z) is

3.7417 ( 5 in. less than elevation (

global Z) )

�Click ok


Bridge Object

�Select Bent �

�Press modify and show

�Select BDIA1 from

diaphragm ( this is the

diaphragm we define before in

slight 11)

� we have to define bent

location top of the deck from

bent location elevation ( global

Z) is -4.2417


�Elevation at layout line

(Global Z) is 3.7417 ( 5 in. less

than elevation ( global Z) ) see

fig

�Click ok

�Then ok and ok to go main

page


�Click ok and ok to go main page fig


Now we Link bridge model

�Go to Bridge

�Update linked bridge model

�Maximmum segment length for deck spans is 5

�Press update as Area Object model

�And click ok


�Click set displace option

�Click extrude view and click ok

�Close one of the windows


Check model with dead load

Go to Bridge �

Update Link bridge model

Update as spine model using frame objects


�Click set displace option

�Click extrude view and click ok


�Now bridge represented by line element

�Then run the analysis by click this


�Select the Modal and click do not run case

�And press run now


�Check bending moment diagram

�Press frames /cables

�Select moment 3-3


�Unlock the model by press this lock

Go to Bridge �

Update Link bridge model

Update as area object model

And run the analysis to see bending moment diagram for individual girder


�Click on diagram and select the shell

Check the F11 as shown in figure �

Then u will have stresses under dead load as seen in next slight


�Now we will define live load

�Unlock the model by press lock

Go to Bridge �

Lane and add new bridge lane and add new lane defined from layout line

�Starting station is 1000 ft

�Center line offset is 8 ft

�And lane width is 12 ft

�And click add

�Click ok


�Click add copy of the lane

�Then enter -16 for center line offset

�Click ok and be sure that u have define lane 2 as shown in figure down

�if not u can enter values for the lane by manual one by one to obtain lane 2

�You can modify every

values by changing the

value then click on modify

�Be sure u have visible

color for lane , you can

change the color by this

button


�Go to display

�Then show lane

�Show lane width

�And be sure that u get figure below


�Now we define vehicles

�Go to bridge and vehicles

� select add vehicles

�And select HSn-44

�Then click convert to general vehicle

�Then click ok

�Click on modify /show button to see what is HSn 44


�HSn 44 shows two point load ( look the load plan ) and

�Different loading ( look the load elevation )

�You can play with values in table below to modify the loading


�We change the two point loads to line load

�Go to axis width type and select the fixed line width

�Then click on modify and do this for all three load

�Be sure u have figure below


�Now we add two more vehicles by click on add

vehicle select HSn-44L then click on convert to

general vehicle button and ok

�Then add one more vehicle and add AML by add

vehicle and select AML and click on convert to

general vehicle


�Now define vehicle class

�Go to bridge and vehicle class

�Add new vehicle class and add three pre defined vehicle

�By this operation we place all the vehicles on the bridge as in fig

� press ok and ok


�Now load cases

�Go to define and load case

�Click on add new load case

�And type load case name as Move 1

�Change load case type as moving load

�Then click on add to apply load on the lane

�In other word we order the vehicles in the way we want on the bridge lane


�Now load combination

�Go to define and load combination

�Click on add new load combination

�Click on add button to add dead load

�And select Move 1 and click on add button to add moving load

�Press ok and ok


�Now run the analysis

�Wait until analysis complete

�Close the small window when u see analysis completed successfully u will see

page below


�Now u can get any results you want from display button


�Now unlock the model to see the load pattern for moving load

�Go to define and load pattern

�Type load pattern name as moving load and type as bridge live

�Click on add bridge load pattern on right side of the window

�Then click on modify the bridge live load as shown in fig below


�Add the vehicles one by one and obtain the final figure of the box as in fig

below then click ok


�Now we define an other load pattern name is move

�Click add and then modify to define vehicle order

� arrange the vehicle as in figure below

�Then press ok and ok


�Now we define the load cases

�Go to define and load cases

�And select moving load and press on modify/select load cases

� be sure it is multi step static

�Then click ok


�Now go to move load and select the time history from the load case type

�Select the direct integration for time history type

�And set the windows as shown below


�Click on the modify/show button next to damping


�Set the windows as in the figure below to define mass and stiffness proportion

damping

�Then press ok to close this window then press ok to close previous one then

press ok last time to reach general window

�Then run the analysis


�Click on force diagram

�Then press on step as shown in figure

�Then click ok

�By this way u can see the contour step by step by clicking this button


�Now u can create video file by go to file

�Click on create video and click on create multi step video

�Then set the windows as in the figure

�Then click ok


�Go to display

�Click Show bridge forces/stresses

�U can get all the moment and shear diagrams from this page


�Now u can get all the results of structure analysis of the bridge


Assoc. Prof. Dr. Yavuz YARDIM · Change load case type as moving load Then click on add to apply...

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