Under this section, we’ll model girders, cross-frames, deck, connection components, barriers, and roadway in 3D. Since the parametric relationship between 3D objects and the FE representation of each object is already defined, the finite element model will be automatically generated by OpenBrIM.
Girder Support Conditions
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| 1 | Go to Bearing Fixity on the tree view next to data spreadsheet. |  |
| 2 | Set Tx/Ty/Tz/Rx/Ry/Rz. | |
| 3 | Set Transfer Force to Substructure as Yes for interior pier locations. | |
| 4 | Set Transfer Force to Substructure as No for start and end support locations. | |
| 5 | FE behavior of Transfer Force to Substructure 
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Follow the below steps to set boundary conditions for each bearing location (insertion point) that you have defined while creating the bridge layout.Girders
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| 1 | Go to Plate Girder on the tree view next to data spreadsheet. |  |
| 2 | Click three-dots icon | |
Edit the plate girder dimensions. To enter a station-dependent dimension;
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| 1 | Click three-dots icon |  |
| 2 | Define the station-dimension relationship on the spreadsheet. |  |
| 3 | Top Flange thickness, web depth and thickness, bottom flange width and thickness, haunch thickness, and additional haunch width parameters can be defined similarly to top flange width. | |
| 4 | Click three-dots icon |   |
| 5 | You can edit the FE mesh settings of girders from FEA Settings tab. |  |
| 6 | The girder FE model will be automatically generated by the OpenBrIM based on the parametric relation between the 3D and FEM in the library component. The girder section is represented using FeLine elements for flanges and FeSurface elements for the web. | |
| 7 | 3D view of girders:  FEM view of girders: 
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Cross-Frames
Add K Top type cross frames to start and end support locations and add X type cross frames based on the spacing data.