RESEARCH ARTICLE


Research on Seismic Response and Damping Effect for High-Speed Railway Seismic Isolated Bridge



Lingkun Chen1, 2, Lizhong Jiang*, 1, 2, Weiguo Long1, 2, 3, Liping Wang1, 2
1 School of Civil Engineering, Central South University, Changsha 410075,China
2 National Engineering Laboratory for High Speed Railway Construction, Central South University, Changsha 410075, China
3 School of Mathematics and Physics, University of South China, Hengyang 421001, Hunan, China


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Creative Commons License
© 2011 Chen et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the School of Civil Engineering and Architecture, Central South University, Changsha 410075, China; Tel: +86 -731- 82655536; Fax: +86 -731- 82656611; E-mail: lzhjiang@mail.csu.edu.cn


Abstract

With the development of high-speed railway in recent years, lots of researchers have been paying more and more attention to the seismic isolation of high-speed railway bridge. The equivalent linear model of hysteretic characteristics of lead rubber bearings (LRB) is presented, the computational method and the varying range of dynamic parameters effecting hysteretic characteristics of LRB are established. The finite model of a high-speed railway bridge including simulating of LRB is set up by ANSYS software. The seismic responses and seismic isolation ratio of high-speed isolated bridge installed LRB are calculated, and isolation effect are compared with those fabricated the common bearings; the factors which influence seismic isolation are analyzed. The calculation results show that the bending moment and shear force of pier bottom of and displacement of grider decrease effectively for that bridge with LRB, the LRB has excellent performance on seismic isolation and energy dissipation.

Keywords: Seismic response, damping effect, high-speed railway bridge, seismic isolation, LRB.