| 二维非均匀饱和土体的地震反应分析 |
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| 引用本文： | 秦小军,陈少林.二维非均匀饱和土体的地震反应分析[J].地震工程与工程振动,1999,19(1):7-14. |
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| 作者姓名： | 秦小军 陈少林 |
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| 作者单位： | 中国地震局地震研究所 |
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| 基金项目： | 地震科学联合基金!197073 |
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| 摘 要： | 将饱和土体视为由弹性骨架和不可压缩流体组成的两相孔隙介质，取固相位移，液相位移，孔隙水压力为场变量。从两相孔介质的动力耦合微分方程出发，利用伽辽金原理和Ｗｉｌｓｏｎ－θ法导出了三场有限元积分方法，该方法可进行二维非均匀饱和土体的地震反应分析，文中通过算例讨论了非均匀饱和土体地震反应的一些特征。
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| 关 键 词： | 非均匀饱和土体 有限元 地震反应 土动力学 |
Analysis of Nonhomogeneous Fluid-saturated Soil in Two Dimensions Under Earthquake Load |
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| Qin Xiaojun,Chen Shaolin,Zeng Xinchuan.Analysis of Nonhomogeneous Fluid-saturated Soil in Two Dimensions Under Earthquake Load[J].Earthquake Engineering and Engineering Vibration,1999,19(1):7-14. |
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| Authors: | Qin Xiaojun Chen Shaolin Zeng Xinchuan |
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| Institution: | Institute of Seismology. China Seismological Bureau. Wuhan 430071 |
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| Abstract: | In this paper, the saturated soil is modelled as a two-phase porous media systemconsisting of an elastic solid and an incompressible fluid phase . This approach uses the soliddisplacement, the fluid displacement and the pore pressure as the fluid variables. Based on thetwo -phase coupled differential equations of motion, the application of Galerkin' s principleand Wilson- method yields a three-field finite element integration procedure. The procedurecan be used to analyse the seismic response of the nonhomogeneous fluid- saturated soil in twodimensions. In the paper, some characters of the nonhomogeneous saturated soil underearthquake load is discussed through a sample calculation. |
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| Keywords: | nonhomgeneous fluid-saturated soil three-field finite element procedure seismic re-sponse |
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