Bearing Fixity

This section defines bearing restraints at each support location.

Navigation: Superstructure > Boundary Conditions > Bearing Fixity

Steps

Step 1: Navigate to Bearing Fixity

Navigate to Superstructure > Boundary Conditions > Bearing Fixity in the tree view.

Bearing Fixity navigation

Step 2: Select Insertion Points

Click the first cell in the Insertion Point column and click Pick to select support locations.

Pick insertion points

Step 3: Define Fixities

Set Tx/Ty/Tz/Rx/Ry/Rz values for each bearing based on bearing type.

Fixity values

Step 4: Configure Load Transfer

• Set Transfer Force to Substructure = Yes for interior pier locations

• Set Transfer Force to Substructure = No for abutment locations

Quick Tip: Coordinate System

DOFs are assigned based on the local coordinate system at each insertion point, which changes along the support line and alignment. The Bearing Rotation parameter rotates the support clockwise in the XY plane.

Verification

The completed bearing fixity configuration is shown below.

Completed bearing fixity