[1]夏修身,陈兴冲,李建中.隔震桥梁合理结构阻尼模型[J].东南大学学报(自然科学版),2016,46(1):140-145.[doi:10.3969/j.issn.1001-0505.2016.01.023]
　Xia Xiushen,Chen Xingchong,Li Jianzhong.Reasonable structure damping model of isolated bridge[J].Journal of Southeast University (Natural Science Edition),2016,46(1):140-145.[doi:10.3969/j.issn.1001-0505.2016.01.023]
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隔震桥梁合理结构阻尼模型()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
46
期数:
2016年第1期
页码:
140-145
栏目:
交通运输工程
出版日期:
2016-01-20

文章信息/Info

Title:
Reasonable structure damping model of isolated bridge
作者:
夏修身1; 陈兴冲1; 李建中2
1兰州交通大学土木工程学院, 兰州 730070; 2同济大学土木工程学院, 上海 200092
Author(s):
Xia Xiushen1;  Chen Xingchong1;  Li Jianzhong2
1School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
2College of Civil Engineering, Tongji University, Shanghai 200092, China
关键词:
桥梁;  隔震;  阻尼
Keywords:
bridge;  earthquake isolation;  damping
分类号:
U442.55
DOI:
10.3969/j.issn.1001-0505.2016.01.023
摘要:
为了更好地处理隔震桥梁中的复杂阻尼问题,探讨了隔震桥梁中阻尼的模拟方法.根据阻尼的来源及作用机制不同,将隔震桥梁的阻尼分为滞回阻尼与结构阻尼两类.基于统一振型阻尼比的振型叠加法,给出了采用瑞利阻尼模拟结构阻尼时控制振型的选取方法.以支座位移与墩底内力作为复合指标,以无结构阻尼的地震反应作为参照,考查了采用瑞利阻尼与刚度比例阻尼时隔震桥梁的地震反应.结果表明,结构阻尼对隔震桥梁中的地震反应有较大的影响,经典的瑞利阻尼不适于隔震桥梁,利用初始刚度比例阻尼来模拟隔震桥梁的结构阻尼相对比较合理.
Abstract:
In order to deal with the complex damping problems in isolated bridges, the damping simulation methods are studied. According to different damping sources and mechanisms, the damping in isolated bridges is divided into two categories, the hysteretic damping and the structural damping. The selection method for the controlling mode with structure damping simulated using Rayleigh damping is proposed based on the mode superposition method with the uniform mode. Taking the seismic response without structural damping as reference, the seismic responses of an isolated bridge with Rayleigh damping and stiffness proportional damping are investigated by using the bearing displacement and the internal force of pier bottom as composite index.The results show that structural damping has great influence on the seismic response of the isolated bridge. The classical Rayleigh damping is not suitable for the isolated bridge. Using stiffness proportional damping based on the initial stiffness to simulate structure damping in the isolated bridge is reasonable.

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备注/Memo

备注/Memo:
收稿日期: 2015-06-26.
作者简介: 夏修身(1978—),男,博士,副教授,xiaxiushen@mail.lzjtu.cn.
基金项目: 国家自然科学基金资助项目(51268033)、长江学者和创新团队发展计划资助项目(IRT1139).
引用本文: 夏修身,陈兴冲,李建中.隔震桥梁合理结构阻尼模型[J].东南大学学报(自然科学版),2016,46(1):140-145. DOI:10.3969/j.issn.1001-0505.2016.01.023.
更新日期/Last Update: 2016-01-20