[1]向需文,王浩,李爱群,等.考虑PGA和PGV比值影响的板式橡胶支座连续梁桥减震控制[J].东南大学学报(自然科学版),2017,47(5):1006-1012.[doi:10.3969/j.issn.1001-0505.2017.05.026]
 Xiang Xuwen,Wang Hao,Li Aiqun,et al.Aseismic control of continuous bridge with laminated rubber bearings considering ratio of PGA to PGV[J].Journal of Southeast University (Natural Science Edition),2017,47(5):1006-1012.[doi:10.3969/j.issn.1001-0505.2017.05.026]
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考虑PGA和PGV比值影响的板式橡胶支座连续梁桥减震控制()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
47
期数:
2017年第5期
页码:
1006-1012
栏目:
交通运输工程
出版日期:
2017-09-20

文章信息/Info

Title:
Aseismic control of continuous bridge with laminated rubber bearings considering ratio of PGA to PGV
作者:
向需文1王浩1李爱群12吴宜峰1沙奔1
1东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096; 2北京建筑大学北京未来城市设计高精尖创新中心, 北京 100044
Author(s):
Xiang Xuwen1 Wang Hao1 Li Aiqun12 Wu Yifeng1 Sha Ben1
1Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
2Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
关键词:
板式橡胶支座 滑动效应 地震动特性 拉索减震支座
Keywords:
laminated rubber bearings sliding effect ground motion characteristics cable sliding friction aseismic bearings
分类号:
U448.215;U446.36
DOI:
10.3969/j.issn.1001-0505.2017.05.026
摘要:
为解决板式橡胶支座连续梁桥在强震作用下可能发生支座滑动进而产生桥梁碰撞、甚至落梁的问题,基于ANSYS平台建立了某板式橡胶支座连续梁桥的有限元模型,进行地震反应时程分析,研究了地震动峰值加速度(PGA)与峰值速度(PGV)的比值(fg)对桥梁板式橡胶支座滑动效应的影响,并给出了相对不利地震动输入方式.在相对不利地震动输入下,引入拉索减震支座进行减震研究,并对该支座的拉索刚度和初始间隙进行参数敏感性分析.结果表明,fg在一定程度上能够表征地震动频谱特性,板式橡胶支座的滑动能力与支座位移随fg的减小而增大;在相对不利的fg较小的地震作用下,拉索减震支座具有良好的限位能力,合理设置拉索刚度和初始间隙能有效防止桥梁碰撞、落梁等灾害.
Abstract:
To solve the problem that bridge collision or girder falling might be caused by the bearing sliding of bridges with laminated rubber bearings under strong earthquake, a finite model of a continuous bridge isolated by laminated rubber bearings was established by ANSYS. Based on the time-history analysis, the influence of the ratio of the peak ground acceleration(PGA)to the peak ground velocity(PGV), fg, on the sliding response of the laminated rubber bearings was discussed and the relatively unfavorable ground motion input mode was concluded. With the input of the relatively unfavorable ground motion, the cable sliding friction aseismic bearings were introduced to absorb shock, and the parameter sensitivity analysis of the cable stiffness and the initial gap was carried out. The results show that fg can characterize the frequency characteristics of the ground motion to some extent. The sliding capacity of the plate rubber bearing and the bearing displacement increase as fg decreases. Under the relatively unfavorable ground motion with small fg, the cable sliding friction aseismic bearings have great capacity of displacement restriction, and reasonable setting of the cable stiffness and the initial gap can effectively prevent disasters such as bridge collision and beam falling.

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备注/Memo

备注/Memo:
收稿日期: 2017-03-02.
作者简介: 向需文(1993—),男,硕士生;王浩(联系人),男,博士,研究员,博士生导师,wanghao1980@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51278104,51578151).
引用本文: 向需文,王浩,李爱群,等.考虑PGA和PGV比值影响的板式橡胶支座连续梁桥减震控制[J].东南大学学报(自然科学版),2017,47(5):1006-1012. DOI:10.3969/j.issn.1001-0505.2017.05.026.
更新日期/Last Update: 2017-09-20