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Earthquakes and Structures Volume 17, Number 3, September 2019 , pages 317-327 DOI: https://doi.org/10.12989/eas.2019.17.3.317 |
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Modeling the cumulative residual deformation of high-speed railway bridge pier subjected to multiple earthquakes |
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Hongye Gou, Dan Leng, Longcheng Yang and Hongyu Jia
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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 highspeed 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. | ||
| Key Words | ||
| high-speed railway bridge piers; multiple earthquakes; cumulative residual deformation; nonlinear numerical analytical model with multi-DOF | ||
| Address | ||
| Hongye Gou: Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China Dan Leng, Longcheng Yang and Hongyu Jia: Department of Bridge Engineering, School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China | ||