确定土层地震最大反应的简化方法

符圣聪, 江静贝

确定土层地震最大反应的简化方法

符圣聪, 江静贝

中国建筑科学研究院工程抗震研究所

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出版历程
- 刊出日期: 2011-09-01

A SIMPLIFIED PROCEDURE FOR EVALUATING MAXIMUM RESPONSE OF SOIL LAYER DURING AN EARTHQUAKE

FU SHENGCONG, JIANG JINGBEI

Institute of Building Earthquake Engineering, Chinese Academy of Building Reaserch

摘要

摘要: 本文将水平土层简化为剪切型多自由度线性体系,根据对土层地震反应的振型迭加法所得结果的统计分析,确定体系的传递函数。参考概率理论中有关求极值的办法,给出与功率谱密度相应的反应谱。同时,根据振型均方根的办法,给出土层的加速度、相对位移、剪应变和剪应力的最大反应值沿深度的分布。分析结果表明,文中所提供的方法与精确法所得的结果有很好的吻合。
Abstract: In this paper, the horizontally stratified soil layers are simplified as a shearing type multi-degree of freedom linear system. The transfer function of the system is determined in accordance with the statistical analysis of the result from the mode superposition method of soil layer earthquake response. By referring to the method of finding the extreme value in probabilistic theory, a response spectrum corresponding to the power spectral density of soil layers is given. At the same time, distributions of maximum response values of acceleration, relative displacement, shearing strain and Clearing stress of the soil layers along the depth are given according to the mode root mean square procedure. Eesults agree well with that of non-simplified methods.

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参考文献(1)

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