Performance-based earthquake analysis of 2-span bridgesystem using BridgePBEE

This study aims to introduce a graphical user interface （BridgePBEE） to assess the seismic performance of coupled soil-structure systems under the Performance-Based Earthquake Engineering （PBEE） framework. A three-dimensional （3D） Finite-Element （FE） model for a typical simple bridge configuration is developed using BridgePBEE to conduct time history analysis of the bridge-ground system. The nonlinear dynamic response of the bridge during multiple suites of earthquake excitations is studied. Seismic loss in terms of repair cost for pre-defined performance groups is derived thereafter. This study shows that the local site soil profile affects the seismic response of the bridge considerably and should be considered in design procedures.