| 基于双向地震作用下边坡共振特性与固有频率研究 |
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| 引用本文： | 言志信,张学东,张森,张刘平,曹小红.基于双向地震作用下边坡共振特性与固有频率研究[J].水文地质工程地质,2011,38(2):46-51. |
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| 作者姓名： | 言志信 张学东 张森 张刘平 曹小红 |
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| 作者单位： | 兰州大学土木工程与力学学院;西部灾害与环境力学教育部重点实验室(兰州大学); |
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| 基金项目： | 国家自然科学基金资助项目，高等学校博士学科点专项科研基金资助课题项目，甘肃省自然科学基金计划项目 |
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| 摘 要： | 避共振是工程抗震设计中的重要课题,目前在边坡工程中鲜见这方面的研究。本文运用有限元法研究了边坡在双向地震作用下的共振规律及其固有频率。研究结果表明:边坡虽然有多阶固有频率,但只有前三阶固有频率处共振峰明显,其中尤以第一阶频率处的共振峰值最为突出,其他频率处则无明显共振现象;边坡在双向地震作用下的共振响应存在垂直放大和临空面放大作用;阻尼越大共振峰值越小,共振曲线越平缓;对影响边坡固有频率的主要因素进行深入研究,通过回归分析建立了边坡固有频率的经验公式,经检验该公式的计算误差较小。
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| 关 键 词： | 边坡 地震 共振 固有频率 回归分析 |
Study on resonance characteristics and natural frequency of slope under bi-directional seismic action |
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| YAN Zhi-xin,ZHANG Xue-dong,ZHANG Sen,ZHANG Liu-ping,CAO Xiao-hong.Study on resonance characteristics and natural frequency of slope under bi-directional seismic action[J].Hydrogeology and Engineering Geology,2011,38(2):46-51. |
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| Authors: | YAN Zhi-xin ZHANG Xue-dong ZHANG Sen ZHANG Liu-ping CAO Xiao-hong |
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| Institution: | 1.College of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China;2.Key Laboratory of Mechanics on Disaster and Environment in Western China(Lanzhou University),Ministry of Education,Lanzhou 730000,China |
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| Abstract: | One of the most important issues in seismic design is to avoid resonance,and presently there were few studies about this issue in slope engineering.In this paper,the resonance law and natural frequency of slope under bi-directional seismic were studied by Finite Element Method.The results showed that although the slope had multiple natural frequencies,only the resonance peak of first three order natural frequency is most prominent,especially the first order frequency resonance peak,and there was no obvious ... |
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| Keywords: | slope earthquake resonance natural frequency regression analysis |
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