Earthquakes and Structures

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Modeling the cumulative residual deformation of high-speed railway bridge pier subjected to multiple earthquakes

  • Gou, Hongye (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Leng, Dan (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Yang, Longcheng (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University) ;
  • Jia, Hongyu (Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University)
  • Received : 2018.06.23
  • Accepted : 2019.06.20
  • Published : 2019.09.25
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Abstract

High-speed railway bridge piers in seismically active area may be subjected to multiple earthquakes and then produce cumulative residual deformation. To study the cumulative residual deformation of high-speed railway bridge piers under multiple earthquakes, a nonlinear numerical analytical model with multi-DOF (MDOF) system is presented and validated against two shaking table tests in this paper. Based on the presented model, a simple supported beam bridge pier model of high-speed railway is established and used to investigate the cumulative residual deformation of high-speed railway bridge pier under mainshock-aftershock sequences and swarm type seismic sequences. The results show that the cumulative residual deformation of the bridge pier increases with earthquake number, and the increasing rates are different under different earthquake number. The residual deformation of bridge pier subjected to multiple earthquakes is accumulated and may exceed the limit of code.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China, Ministry of Science and Technology of China

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