| 基于广义塑性理论的土体液化分析方法 |
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| 引用本文： | 牛志伟,李同春,李宏恩.基于广义塑性理论的土体液化分析方法[J].水力发电学报,2012,31(1):99-102,107. |
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| 作者姓名： | 牛志伟 李同春 李宏恩 |
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| 作者单位： | 1. 河海大学水利水电学院,南京,210098
2. 南京水利科学研究院,南京,210024 |
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| 基金项目： | 水利部公益项目边坡地震失稳机理与抗震安全度评价方法研究(201001035);河海大学自然科学基金(2009421811);中央高校基本科研业务费专项资金资助(2009B07314);江苏高校优势学科建设工程资助项目(水利工程) |
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| 摘 要： | 土体本构模型和液化分析是进行土体动力反应分析的主要研究内容。将土体作为液固两相孔隙介质,考虑土体骨架与孔隙流体之间的动力相互作用,采用基于广义塑性理论的PZ模型来模拟土体,分析土体在地震动荷载作用下的响应。通过研究土体内孔隙水压力产生、消散过程及土体有效应力的变化过程来进行土体液化的判定,利用这种方法可以得到土体在地震荷载作用下的液化深度。
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| 关 键 词： | 岩土力学 液化分析 动力分析 PZ模型 土体本构模型 |
Method of soil liquefaction analysis based on generalized plasticity theory |
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| NIU Zhiwei,LI Tongchun,LI Hong-en.Method of soil liquefaction analysis based on generalized plasticity theory[J].Journal of Hydroelectric Engineering,2012,31(1):99-102,107. |
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| Authors: | NIU Zhiwei LI Tongchun LI Hong-en |
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| Affiliation: | 1.College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098; 2.Nanjing Hydraulic Research Institute,Nanjing 210024) |
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| Abstract: | Constitutive model and analysis of soil liquefaction are two major issues in the area of soil dynamic response analysis.In this work,soil response under seismic load was analyzed with a PZ model of the general plasticity theory.Soil is treated as solid-liquid two-phase porous media,and dynamic interaction between soil skeleton and pore fluid is considered.A criterion of soil liquefaction is established through a study of the generation and dissipation process of soil pore water pressure and the variations of effective soil stress.By this method,soil liquefaction depth under earthquake load can be obtained. |
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| Keywords: | rock-soil mechanics liquefaction analysis dynamic analysis PZ model constitutive model of soil |
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