| 考虑基础提离与塑性的桥墩地震反应 |
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| 引用本文： | 郑越,陈兴冲.考虑基础提离与塑性的桥墩地震反应[J].地震工程与工程振动,2009,29(4). |
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| 作者姓名： | 郑越 陈兴冲 |
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| 作者单位： | 1. 香港理工大学,土木与结构工程系,香港
2. 兰州交通大学,土木工程学院,甘肃,兰州,730070 |
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| 基金项目： | 教育部高等学校骨干教师资助计划资助 |
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| 摘 要： | 浅平基桥墩在承受强震作用时,其基础与地基之间会发生提离,地基土会进入塑性状态.精确模拟上述两个问题是非常困难的.本文分析中地基采用了能考虑基础提离及地基塑性的弹塑性Winkler地基模型,采用1940年El Centro(NS)地震记录作为输入,对三个不同高度的双柱式浅平基桥墩进行了非线性时程分析.研究结果表明,基础提离和地基塑性对双柱式桥墩的地震反应有很大影响.考虑地基非线性后,墩顶位移增大,剪力减小,对保护桥墩减小震害是有利的.
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| 关 键 词： | 桥梁工程 提离 屈服 弹塑性 Winkler地基模型 双柱式桥墩 地震反应分析 |
Seismic response of double-column bridge piers considering uplift and yield of foundation |
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| ZHENG Yue,CHEN Xingchong.Seismic response of double-column bridge piers considering uplift and yield of foundation[J].Earthquake Engineering and Engineering Vibration,2009,29(4). |
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| Authors: | ZHENG Yue CHEN Xingchong |
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| Institution: | ZHENG Yue1,CHEN Xingchong2 (1.Department of Civil , Structural Engineering,The Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China,2.School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China) |
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| Abstract: | When the bridge piers with shallow foundation are subjected to intense earthquake excitations,the uplift of foundations will occur and the foundation soil will enter into plasticity.It is very difficult to use an accurate method to simulate the uplift and yield of supporting soil.An improved Winkler foundation model,which could be used to consider uplift and yield,was employed in the analysis.The 1940 El Centro(NS) earthquake record was input to a double-column bridge pier with shallow foundation,so that th... |
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| Keywords: | bridge engineering uplift yield elasto-plastic Winkler foundation model double-column bridge pier seismic response analysis |
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