Study on Seismic Performance of Bridges with Energy Dissipation Self-centering Sliding-lead Rubber Bearings

被引：0

作者：

Zheng W.-Z. ^{[1
,2
]}

Tan P. ^{[1
,2
]}

Wang H. ^{[3
]}

Xian Z.-B. ^{[1
]}

Liu Y.-H. ^{[2
]}

机构：

[1] School of Civil Engineering, Guangzhou University, Guangdong, Guangzhou

[2] Key Laboratory of Earthquake Resistance Earthquake Mitigation & Structural Safety of Ministry of Education, Guangzhou University, Guangdong, Guangzhou

[3] Key Laboratory of C &• PC Structures of the Ministry of Education, Southeast University, Jiangsu, Nanjing

来源：

Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2024年 / 37卷 / 01期

基金：

中国博士后科学基金;

关键词：

bridge engineering; energy dissipation self-centering sliding-LRB; model verification; parameter optimization; seismic performance; shape memory alloy;

D O I：

10.19721/j.cnki.1001-7372.2024.01.009

中图分类号：

学科分类号：

摘要：

To improve the seismic performance of girder bridges, this study proposes a novel energy dissipation self-centering sliding-lead rubber bearing (S C S L R B) . A parameter design; method for bridges with energy dissipation SCSLRBs is further suggested based on the hysteretic properties of the shape memory alloy (S M A) . First, the numerical models of the energy dissipation sliding-lcad rubber bearing (EDSLRB) and the SMA cables are created based on the OpenSees Software, the hysteretic responses of which are analyzed under cyclic loadings and are compared with the test results to verify the accuracy of the numerical models. The numerical model of the energy dissipation SCSLRB is further achieved. Based on the verified numerical model, by selecting a seismically isolated bridge, the optimal design of the parameters of the energy dissipation SCSLRB system is conducted based on the proposed parameter design method. The applicability of the proposed design method and the seismic performance of the bridge isolated by energy dissipation SCSLRBs are further investigated and discussed based on the optimum parameters. Results show that the optimum parameters of the energy dissipation SCSLRB system are achieved by the proposed parameter design method. The seismic performance of the energy dissipation SCSLRB system for response mitigation of bridges under near-fault earthquakes is effectively improved using the optimum parameters. The displacement of the bridge deck, the residual deformation of the SCSLRB, base shear and bending moment of the piers arc dual effectively mitigated. In particular, the girder displacement is reduced by 18. 5 %, the residual deformation is significantly reduced, the base force of the piers is only increased by 8. 3 %, the energy dissipation of the novel bearing is improved by 14. 8%. Results can provide a reliable basis for resilience improvement of girder bridges under near-fault earthquakes. © 2024 Xi'an Highway University. All rights reserved.

引用

页码：107 / 116

页数：9

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