This tutorial was initially developed for bridge modeler in SAP2000, but the concept applies also to CSiBridge.


This tutorial describes the modeling process for a composite bridge composed of a concrete slab over steel girders with variable flange thickness.

Modeling steps

To obtain the variable flange thickness desired, users should assign non-prismatic girder sections to the bridge deck section.

Create new model from template

Define non-prismatic steel girder sections


Create bridge deck sections


Assign bridge deck sections to the bridge object




See Also