Steel Tub Girder - Additional Bearing Construction and Deconstruction

Follow the steps below for the construct and deconstruct of temporary bearings.

Throughout this article, additional bearings will be constructed and deconstructed on the steel tub girder model shown below. Additional supports will be added at the 25th and 75th feet of the 100-foot-long girder. The construction will be carried out in three stages.

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Instructions	Screenshot
Create Addtional Support Line
Create additional insertion points on additional support lines. These insertion points can be created on existing support lines with a longitudinal offset. However, creating a new support line is a better option.
Include the insertion points in the girder layout. The girder object has been configured to generate bearings on the same support line as the insertion points in the girder layout.
Select all bearing insertion points related to the girder in the ‘Support’ input under the ‘FEA Setting’ tab of the Tub Girder. The ones shown with the blue arrow are the additional bearings.
Define bearing fixity for the relevant insertion points
Construct the bearings stage by stage under 'Bearing Construction'.
Select the additional bearings to be deconstructed under 'Bearing Deconstruction'

When positioning additional insertion points, you can match them with web nodes or use an internal diaphragm at the same station. Otherwise, due to low stiffness, you may observe large deformations at the corresponding station.