| 地震动非平稳性对深覆盖场地地震反应的影响 |
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| 引用本文： | 李英成,陈清军.地震动非平稳性对深覆盖场地地震反应的影响[J].土木工程学报,2010(Z1). |
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| 作者姓名： | 李英成 陈清军 |
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| 作者单位： | 同济大学土木工程防灾国家重点实验室; |
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| 基金项目： | 科技部国家重点实验室基础研究资助项目(SLDRCE08-B-03); 国家自然科学基金(50978198) |
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| 摘 要： | 以上海某深覆盖场地为背景,分别选用普通El-Centro波和长周期HKD123波作为输入,采用正交化HHT方法探讨地震动非平稳性对深覆盖场地地震反应的影响。首先,采用正交化HHT方法分析El-Centro波和HKD123波的局部功率谱,比较这两条波的能量分布情况。然后,采用等效线性波动法求取深覆盖场地的地表反应,并采用正交化HHT法对其进行时频特性分析,比较不同强度的不同类型地震波作用下深覆盖场地的反应差异,以及能量分布的变化情况。结果表明,地震动的非平稳性对深覆盖场地非线性地震反应的影响不容忽视。
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| 关 键 词： | 地震动非平稳性 深覆盖场地 正交化HHT法 等效线性波动法 时频分析 |
Effect of ground motion non-stationarity on the seismic response of soil layer with deep deposit |
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| Li Yingcheng Chen Qingjun.Effect of ground motion non-stationarity on the seismic response of soil layer with deep deposit[J].China Civil Engineering Journal,2010(Z1). |
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| Authors: | Li Yingcheng Chen Qingjun |
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| Affiliation: | Li Yingcheng Chen Qingjun (State Key Laboratory of Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China) |
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| Abstract: | Based on the Shanghai soil layer with deep deposit,this paper investigates the effect of ground motion non-stationarity on the seismic response of soil layer with deep deposit by the orthogonal HHT method.Firstly,the energy distribution of the normal El-Centro wave and long-period HKD123 wave were researched by the orthogonal HHT method,and then,the ground responses of soil layer with deep deposit under these waves input with different amplitude were calculated by the equivalent linear fluctuation method.Th... |
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| Keywords: | ground motion non-stationarity soil layer with deep deposit orthogonal HHT method equivalent linear fluctuation method time-frequency analysis |
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