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If two or more bearings are needed for the bottom plate of the tub girder at a specific station, the steps should be as follows. The bearings will be generated at the exact location of the insertion points as defined:
1.Define insertion points at Bridge Geometry -> Insertion Points.
2.Define those insertion points as bearings at Superstructure -> FEA Bearings.
Then, the FEA View (chosen from the top left-hand sidebar) should be as follows.
3.The third and final step is assigning the required bearings to girders. This must be done in Superstructure -> Steel Girders -> Tub Girder FEA Settings Tab by using the Supports column and selecting the 'Pick...' option. This step overrides the data related to the bearing generation parameters, resulting in the proper formation of bearings ,as shown in the screenshot below.
Mesh Size (Longitudinal): The maximum distance between nodes in the longitudinal direction is specified using the longitudinal mesh size. In most cases, a smaller mesh size can be generated based on the bracing locations, deck pouring or deconstruction definitions, or section change locations.
# of Result Extraction St.: The result extraction station settings are solely for viewing FEA composite results in either the spreadsheet or FEA view, and do not impact standard finite element analysis results like member end forces, node displacement, and node reactions. For girder code checks, exact code check stations will be utilized for FEA composite results.
Rigid Section: This parameter's definition is only used when there are two or more bearings at the same station.Rigid beams are employed to link the bottom nodes of tub girders with bearing locations/supports as seen in the screenshot below. Please refer to the following documentation to understand how to define rigid sections.
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