This section defines the steel tub girder geometry with station-dependent plate dimensions.
Step 1: Navigate to Tub Girder
Navigate to Steel Girders > Tub Girder in the tree view.
Step 2: Assign Girder Layouts
Click the three-dot icon on the Girder Layout cell and set GL1 and GL2.
Step 3: Define Top Flange Width
Click the three-dot icon on the top flange width cell, select Edit, and enter 22 for both GL1 and GL2.
Step 4: Define Station-Dependent Thicknesses
Click the three-dot icon on the top flange thickness cell and select Edit (Spreadsheet) to enter station-dependent values.
Step 5: Set Web Depth
Enter 78 for Web Depth Projected to CL of box.
Step 6: Define All Plate Dimensions
Use Edit or Edit (Spreadsheet) to define:
Bottom flange width and thickness
Haunch thickness and additional haunch width
Step 7: Assign Materials
Click the three-dot icon on material cells and select A709_50W for:
Navigate to FEA Setting tab and assign RigidSection to the Rigid Section column.
Quick Tip: Haunch Thickness Definition
Haunch Thickness = Distance from the bottom of the deck to the bottom of the top flange.
Quick Tip: FE Model Generation
OpenBrIM automatically generates the FE model based on parametric relationships. Flanges use FeLine elements and webs use FeSurface elements.
The completed tub girder model is shown below.
Completed girder cross-section Last updated
