Earthquake-inducedCollapse Simulation of a Super Long Span Cable-Stayed BridgeBased on an Open Source FE Program

Kaiqi Lin, Linlin Xie, Xinzheng Lu,Lieping Ye

Proc. 2015 IABSE Conference – Structural Engineering:Providing Solutions to Global Challenges September 23-25 2015, Geneva, Switzerland,1671-1678.

Abstract

Currently, theseismic performance assessments of long span bridges are generally conductedusing commercial finite element (FE) software packages, which to some extentlimit thein-depth investigation ofassociated topics. A numerical model system is proposed to simulate a superlong span cable-stayed bridge with a maximum span of 1500 m based on an open source FE software package(i.e., OpenSees). The seismic performance of this bridge is investigated. Thesimulation results of OpenSees and the commercial software MSC.Marc arecompared with a good agreement. Furthermore, a collapse simulation of the bridge is also successfullyperformed and the correspondingcollapse mechanism is revealed. The research outcome could provide a referencefor further studies on the seismicperformance of super long span cable-stayed bridges based on open source FEprograms.

Keywords: super long span cable-stayed bridge; seismicperformance; collapse simulation; OpenSees; multi-layered shell element