Numerical Simulation of a Collaborative Experiment on a Double-Skinned Concrete-Filled-Tubular Bridge

Numerical Simulation of a Collaborative Experiment on a Double-Skinned Concrete-Filled-Tubular Bridge

This paper presents numerical simulation results of a Taiwan-Canada collaborative experiment simulating a double-skinned concrete-filled-tubular(DSCFT) bridge subjecting to a series of bi-lateral earthquakes. Two numerical models based on different approaches are employed. These models are called Hinge Model and Fiber Model in this paper, and implemented and analyzed by PISA3D and OpenSees, respectively. Material and element properties are mainly based on uni-axial steel tensional tests and concrete compressive tests and then tuned based on a previously completed DSCFT cyclic experiment. The numerical results of the two models are reasonably close, and the differences between them are discussed. The estimated maximal shear forces and displacements are used to check that each laboratory has sufficient capacities to complete the experiment. Further studies on the DSCFT behaviors and the numerical models will be further studied after the experiment. This experiment not only to demonstrate the seismic performance of DSCFT piers, but also establishes a collaboration mechanism of earthquake engineering experiments between Taiwan and Canada.