[1]朱文正.多跨简支梁桥加固措施的抗震性能评估[J].深圳大学学报理工版,2015,32(No.2(111-220)):152-161.[doi:10.3724/SP.J.1249.2015.02152]
 Zhu Wenzheng.Seismic performance evaluation of retrofit measures for multi-span simple-supported bridges[J].Journal of Shenzhen University Science and Engineering,2015,32(No.2(111-220)):152-161.[doi:10.3724/SP.J.1249.2015.02152]
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多跨简支梁桥加固措施的抗震性能评估()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第32卷
期数:
2015年No.2(111-220)
页码:
152-161
栏目:
土木建筑工程
出版日期:
2015-03-20

文章信息/Info

Title:
Seismic performance evaluation of retrofit measures for multi-span simple-supported bridges
文章编号:
201502006
作者:
朱文正
广州大学土木工程学院,广州 510006
Author(s):
Zhu Wenzheng
School of Civil Engineering, Guangzhou University, Guangzhou 510006, P.R.China
关键词:
桥梁工程抗震加固多跨简支梁桥限位拉索普通橡胶支座铅芯橡胶支座
Keywords:
bridge engineering seismic retrofit multi-span simple-supported bridge restrainer cables elastomeric bearing lead rubber bearing
分类号:
TU 392.303
DOI:
10.3724/SP.J.1249.2015.02152
文献标志码:
A
摘要:
对一座典型的五跨简支铁路箱梁桥进行了多种工况的非线性地震反应分析,评价限位拉索、混凝土墩套、橡胶支座和铅芯橡胶支座等措施对桥梁主要构件抗震性能的影响.结果表明,各措施对桥梁构件的抗震性能有不同程度的改善,限位拉索和铅芯橡胶支座可以有效消减使用活动支座或普通橡胶支座时墩梁的相对位移;铅芯橡胶支座和普通橡胶支座均显著减少了桥墩的延性需求,但普通橡胶支座加大了墩梁间的相对位移和梁体对桥台的碰撞;限位拉索的初始间隙可考虑支座的允许变形,适当取较大值.建议采用铅芯橡胶支座或普通橡胶支座更换固定支座,必要时采用增加混凝土墩套的方法提高桥墩的塑性变形能力.研究成果可用于结构的易损性评价和基于桥梁整体性能的系统化抗震研究.
Abstract:
This paper conducts a nonlinear time-history analysis of a typical 5-span simply supported bridge by using three-dimensional models to evaluate the effectiveness of various retrofit measures. Restrainer cables, concrete jackets, elastomeric bearings, and lead rubber bearings are assessed for their influence on the variability of critical components in the bridge. The results indicate that each retrofit measure may be effective for components of the bridge in different degrees. The restrainer cables and lead-rubber bearings (LRBs) are effective in controlling the relative deformation between girders and piers; LRBs and elastomeric bearings improve the response of the vulnerable columns, elastomeric bearings lead to increased abutment demands, and a larger value can be chosen for the initial gap of the restrainer cable based on the permitted deformations of the bearings. Additionally, it is recommended to replace these fixed bearings with elastomeric bearings or LRBs, and to enhance ductility capacity of the columns with concrete jackets when necessary. The results can be used for vulnerability assessments that consider the impact of retrofit on system vulnerability reflecting the contribution of multiple components.

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备注/Memo

备注/Memo:
基金项目:广东省科技计划资助项目(2011A030200019)
作者简介:朱文正(1971—),男(汉族),河南省上蔡县人,广州大学副教授、博士. E-mail: zhu7101@163.com
引文:朱文正. 多跨简支梁桥加固措施的抗震性能评估[J]. 深圳大学学报理工版,2015,32(2):152-161.
Received:2014-07-03;Revised:2014-12-29;Accepted:2015-01-31
Foundation:Science and Technology Project of Guangdong Province(2011A030200019)
Corresponding author:Associate professor Zhu Wenzheng. E-mail: zhu7101@163.com
Citation:Zhu Wenzheng. Seismic performance evaluation of retrofit measures for multi-span simple-supported bridges[J]. Journal of Shenzhen University Science and Engineering, 2015, 32(2): 152-161.(in Chinese)
更新日期/Last Update: 2015-03-12