Thermomechanical analysis of composite structures using Opensees

Jian Jiang, Guo-Qiang Li, Asif Usmani

Abstract


The OpenSees framework has been extended to deal with steel-concrete composite structures under fire conditions. The single section and rigid link methods can be used to model composite beams and slabs in OpenSees. The former models the composite beam by defining a single beam section including steel beam and concrete slab and the latter is to define them separately interconnected by rigid link element. The equivalence of these two methods is verified by mechanical tests and fire tests on simply supported composite beams. Good agreements achieved between OpenSees predictions and experimental measurements shows the robustness of the developed OpenSees.

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