Developments in Finite Element Analysis for Bridges

“Eurocodes and Innovation”

2

Eurocodes and Innovation

midas CivilDevelopments in Finite Element Analysis for Bridges

Ease of UseVehicle Loading - AutocombinationsCable TuningConstruction Stage AnalysisCode checking - Eurocodes

3

Eurocodes and Innovation

midas Civil

[ Steel Plate Girder Bridge ]

[ Arch Bridge ]

[ Post-tensioned Tendon Bridge ]

[ Suspension Bridge ]

[ Cable-stayed Bridge ]

Ease of Use / User Interface

4

Eurocodes and Innovation

midas Civil

Composite PC Girder Bridge

Bridge Modeling

5

Eurocodes and Innovation

midas Civil

Composite Steel Girder Bridge

Bridge Modeling

6

Eurocodes and Innovation

midas Civil

Composite Steel Girder Bridge

Bridge Modeling

7

Eurocodes and Innovation

midas Civil

PSC Box Bridge (4 Cells)

Bridge Modeling

8

Eurocodes and Innovation

midas Civil

Segmental Bridge and Tendons

Bridge Modeling

9

Eurocodes and Innovation

midas Civil

Suspension Bridge Wizard

Bridge Structure Wizards

10

Eurocodes and Innovation

midas Civil

FCM Bridge Wizard

Bridge Structure Wizards

11

Eurocodes and Innovation

midas Civil

RC Slab Bridge Wizard

Bridge Structure Wizards

12

Eurocodes and Innovation

midas Civil

RC Frame/Box Culvert Wizard

Bridge Structure Wizards

13

Eurocodes and Innovation

midas CivilGrillage Model Wizard (customization for Caltrans)

[Layout Tab]

[Span Tab]

[Section Tab] [Transverse Tab]

[Tendon Tab]

[Load Tab]

14

Eurocodes and Innovation

midas CivilGrillage Model Wizard (customization for Caltrans)

[ Grillage Model – BMD ]

15

Eurocodes and Innovation

midas CivilIntegral Bridge Wizard (Lehane)

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Eurocodes and Innovation

midas Civil

Moving Load Code

Traffic Line Lane or

Traffic Surface Lane

Standard Vehicular

Load or User-defined

Vehicular Load

Vehicle Loading

Defining Moving Load in 3 steps

17

Eurocodes and Innovation

midas Civil

Traffic Line Lane or

Traffic Surface Lane

Standard Vehicular

Load or User-defined

Vehicular Load

Moving Load Code

Moving Load Analysis

Defining Moving Load in 3 steps

18

Eurocodes and Innovation

midas Civil

Moving Load Code

Traffic Line Lane or

Traffic Surface Lane

Standard Vehicular

Load or User-defined

Vehicular Load

Defining Moving Load in 3 steps

Moving Load Analysis

19

Eurocodes and Innovation

midas CivilMoving Load Tracer

20

Eurocodes and Innovation

midas Civil

[ Construction Stage Analysis – Bending Moment ]

Staged Construction

21

Eurocodes and Innovation

midas CivilTime Dependent Materials

• Time Dependent Material (Creep/Shrinkage, Compressive Strength and Tendon Loss) as per Eurocode2:04

Model > Properties > Time Dependent Material(Creep/Shrinkage)

Model > Properties > Time Dependent Material(Comp. Strength)

Load > Prestress loads > Tendon Property

Creep/Shrinkage

Compressive

Strength

Tendon

Losses

Time Dependent Material (Creep/Shrinkage, Compressive Strength and Tendon Loss) as per Eurocode2:04

22

Eurocodes and Innovation

midas CivilCode Checking - Eurocodes

Gen (V741) Civil (V740)

Concrete Material DB EC2:2004 EC2:2004

Steel Material DB EC3:2005 EC3:2005

Steel Section DB UNI, BS, DIN UNI, BS, DIN

Time dependent materials (Creep,

Shrinkage and Modulus of Elasticity)EC2:2004 (new for V760) EC2:2004 (new for V760)

Prestress losses EC2:2004 (new for V760) EC2:2004 (new for V760)

Static Wind load EC1:2005 N/A

Static Seismic Load EC8:2004 N/A

Response Spectrum Function EC8:2004 EC8:2004

Vehicle Load N/A EC1:2003

Masonry Pushover UNI N/A

RC Pushover EC8:2004 N/A

Steel Pushover EC8:2004 N/A

Load Combination EC0:2002 EC0:2002

Concrete Frame Design (ULS & SLS) EC2:2004 N/A

Steel Frame Design (ULS & SLS) EC3:2005 N/A

Concrete Slab & Wall Design EC2:2004 (new for V760) N/A

Capacity Design EC8:2004 (new for V760) N/A

Composite Plate Girder Design N/A

EC4:2005

EC2:2004

EC3:2005

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Eurocodes and Innovation

midas CivilCode Checking - Eurocodes

Beam Design/Code Checking

24

Eurocodes and Innovation

midas CivilCode Checking - Eurocodes

Concrete Wall Design/Code Checking

5. Click [Graphic…] button.

25

Eurocodes and Innovation

midas CivilPSC Design

26

Eurocodes and Innovation

midas CivilPSC Design

[ Result Tables ]

[ Design Report (EXCEL compatible) ]

27

Eurocodes and Innovation

midas Civil

FEACivil, Gen

Frame Model

(General Section) Generated Solid Geometry

Analysis Model

(3D Prism Mesh)

Frame Solid Wizard automatically generates Solid Geometry & Mesh

by importing Frame Model (*.MCS) from Civil and Gen.

MCS Format

Automatic Frame to Solid/Shell Model Generation

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Eurocodes and Innovation

midas Civil

File > Export > Frame Section for Solid, Frame Section for Plate

• Tendon Profiles as well as concrete girder can be exported to midas FEA for detail analysis.

• Exporting frame model to plate model in midas FEA is newly implemented.

Export frame model to solid/plate model

• The user can easily generate the solid/plate model with tendons, which will be analyzed in midas FEA.

[midas Civil: line beam model]

[midas FEA: Imported tendons]

Including Tendons if Required

[midas FEA: Solid model]

Eurocodes and Innovation

midas Civil

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[ Geometry Modeling ]

[ Interface Analysis ]

[ Reinforcement Analysis ]

[ Various Contour Plot ]

[ Map-mesh Generation ]

Introduction of midas FEA

Eurocodes and Innovation

midas Civil

30 / 99

Data Exchange

Imported CAD Geometry

Generated MeshStandards for CAD Data Exchange STEP (STandard for the Exchange of Product Model Data)

IGES (Initial Graphics Exchange Specification)

• Import (Geometry)• STEP, IGES

• ACIS*, Parasolid*

• SolidWorks*, Inventor*, etc.

• AutoCAD DWG / DXF

• MIDAS MxT files

‘*’ marked CAD interfaces are options.

• Export (Geometry)• STEP, IGES, BRep

• MSC/NASTRAN*

• Import (Analysis Data)• DIANA

• MSC/NASTRAN

• Neutral (Text)

• Export (Analysis Data)• MIDAS/Civil, MIDAS/Gen

• Neutral (Text)

Eurocodes and Innovation

midas Civil

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Virtual Transformation (Translation, Rotation, Scaling)

by Mouse DraggingTransformation

Control Box

Virtual Mesh Transformation

Eurocodes and Innovation

midas Civil

32 / 99

Modeling Method

• Embedded Bar (Incompatible Mesh)

• Truss (Compatible Mesh) +

Interface (Slip, Friction)

Truss + Interface(Compatible)

Prism Map-Mesh

Embedded Bar (Incompatible)

Analysis Result

Reinforcement Elements

Eurocodes and Innovation

midas Civil

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PSC BoxLoad Step 1

PSC BoxLoad Step 5

• Disc Normal: Opening Direction• Disc Color : Magnitude• Line : Shearing Direction

f wG fGfG /h ε nncr

Discrete Crack Smeared Crack

σncr

ctf ctf

σncr

Concrete Crack Models

Cracking Models Total Strain Crack Fixed Crack Mode & Rotating Crack Model

Discrete Crack Mode Interface Nonlinearity

Results Crack Pattern (Crack Stress/Strain)

Element Status Cracking: Partially/Fully Open, Closed, Not Yet Plasticity: Previously Plastic, Elastic, Plastic, Critical Contact: No Contact, Slip, Stick

midas FEA project applications

Eurocodes and Innovation

midas Civil

34 / 99

Temperature Distribution

Temperature of Fire

Fire in a Subway Structure Guss Asphalt Pavement

Thermal Stress

Temperature at the Top Plate

Heat TransferSteady-State & Transient

Conduction, Convection, Radiation

Heat Flux

Heat Flow

Temperature Gradient Display

midas FEA project applications

Eurocodes and Innovation

midas Civil

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[ TGM (Terrain Geometry Maker) ]

[ Virtual Transformation ]

[ Probe Result ]

[ Partitioned Plot ]

[ Automesh Generation ]

Introduction of midas GTS

Eurocodes and Innovation

midas Civil

36 / 99

Midas GTS project applications

Eurocodes and Innovation

midas Civil

37 / 99

midas GTS project applications