| 基岩上均匀场地中透镜体对地震动的非线性放大作用 |
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| 引用本文： | 梁建文,张炳政,巴振宁.基岩上均匀场地中透镜体对地震动的非线性放大作用[J].地震工程与工程振动,2009,29(6). |
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| 作者姓名： | 梁建文 张炳政 巴振宁 |
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| 作者单位： | 天津大学,建筑工程学院,天津,300072 |
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| 基金项目： | 教育部博士点基金项目 |
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| 摘 要： | 本文采用有限元方法研究基岩上均匀场地中透镜体对地震动的非线性放大作用,分析非线性放大作用和线性放大作用的差别,以及透镜体埋深、宽度、厚度以及输入地震波幅值和频谱等因素对非线性放大作用的影响.研究表明,透镜体的存在对地震动有显著的非线性放大作用,该放大作用可达30%;非线性放大作用一般小于线性放大作用;透镜体宽度对地表加速度反应谱的影响较大,埋深和厚度对地表加速度反应谱的影响较小;输入地震波幅值和频谱也有很大的影响.
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| 关 键 词： | 透镜体 地震动 基岩上均匀场地 放大作用 反应谱 |
Nonlinear amplification of ground motion by a lenticle in single layer on bedrock |
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| LIANG Jianwen,ZHANG Bingzheng,BA Zhenning.Nonlinear amplification of ground motion by a lenticle in single layer on bedrock[J].Earthquake Engineering and Engineering Vibration,2009,29(6). |
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| Authors: | LIANG Jianwen ZHANG Bingzheng BA Zhenning |
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| Institution: | LIANG Jianwen,ZHANG Bingzheng,BA Zhenning (School of Civil Engineering,Tianjin University,Tianjin 300072,China) |
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| Abstract: | This paper investigates the nonlinear amplification of ground motion due to a lenticle in single layer on bedrock by using finite element method,and discusses the difference between the nonlinear and linear amplifications,and the effects of the lenticle's depth,width and thickness and the incident wave's amplitude and spectrum on the ground motion.It is shown that a lenticle can significantly amplify the ground motion and the nonlinear amplification can be 30% larger than the free-field response;nonlinear a... |
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| Keywords: | lenticle ground motion single layer on bedrock amplification response spectrum |
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