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多元复合地基压缩模量参变量变分原理解析解
引用本文:郑俊杰,区剑华,袁内镇,方秦汉. 多元复合地基压缩模量参变量变分原理解析解[J]. 岩土工程学报, 2003, 25(3): 317-321
作者姓名:郑俊杰  区剑华  袁内镇  方秦汉
作者单位:华中科技大学岩土与地下工程研究所;湖北省建筑科学研究设计院;华中科技大学岩土与地下工程研究所 湖北武汉430074;湖北武汉430074;湖北武汉430071;中铁大桥局桥梁勘测设计院;湖北武汉430050;
基金项目:湖北省自然科学基金资助项目(2 0 0 2AB0 0 2),武汉市青年科技晨光计划资助项目(2 0 0 2 50 0 1 0 32 ),华中科技大学科学研究基金,博士后专项基金资助项目
摘    要:选取双折线模型作为土的弹塑性本构模型 ,并在假设桩土变形协调的前提下 ,应用参变量变分原理求解多元复合地基的复合模量在弹性及塑性状态下的解析解。该解在桩间土为弹性状态时与目前工程中应用的面积加权法结果一致 ;当桩间土进入塑性状态时 ,与荷载及土的前后刚度比等因素有关。最后 ,采用大型有限元分析软件ANSYS对以上结论进行仿真验算。该方法为多元复合地基复合模量的求解提供了一种新思路

关 键 词:参变量变分原理  多元复合地基  复合模量  解析解  
文章编号:1000-4548(2003)03-0317-05
修稿时间:2002-09-29

Analytical solutions of composite modulus of multi-element composite foundation by parametric variational principle
ZHENG Junjie,OU Jianhua,YUAN Neizhen,FANG Qinhan. Analytical solutions of composite modulus of multi-element composite foundation by parametric variational principle[J]. Chinese Journal of Geotechnical Engineering, 2003, 25(3): 317-321
Authors:ZHENG Junjie  OU Jianhua  YUAN Neizhen  FANG Qinhan
Affiliation:1.Institute of Geotechnical Engineering Huazhong University of Science and Technology Wuhan 430074 China 2.Hubei Institute of Building Research and Design Wuhan 430071 China 3.China Zhongtie Major Bridge Reconnaissance and Design Institute Wuhan 430050 China
Abstract:Based on the bilinear elasto plastic model for soil and on the deformation consistency of pile and soil, the analytical solutions of composite modulus in a multi element composite foundation under both elastic and plastic conditions are obtained by applying parametric variational principle of minimum potential energy.The results show that the solution in elastic condition is in accord with that calculated by conventional area weighted average method,while the solution under plastic condition is related to factors including load and the ratio of soil stiffness under elastic condition to that under plastic condition.At last,all the solutions are verified by ANSYS. The method provide a new way to calculate the composite modulus of multi element composite foundation.
Keywords:parametric variational principle  multi element composite foundation  composite modulus  analytical solution
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