比奥固结有限元中参数正交敏感性分析  

ORTHOGONAL ANALYSIS OF PARAMETERS IN FINITE ELEMENT METHOD FOR BIOT PLAIN CONSOLIDATION WITH DUNCAN-CHANG SOIL MODEL

作　　者：王华敬[1] 缪林昌[1] 张继周[1] 

机构地区：[1]东南大学岩土工程研究所

出　　处：《工程地质学报》2008年第3期360-364,共5页Journal of Engineering Geology

基　　金：国家自然科学基金项目(No.50478072)

摘　　要：用邓肯-张模型求解比奥平面固结有限元涉及到的参数较多,本文通过正交试验研究参数共同随机变化对软土地基固结沉降的影响,发现其中的k、c、G、φ和F对整个固结沉降过程的影响是高度显著的;Pc在固结的初期影响是显著的;在其他参数变异较大时,Rf对固结沉降的影响相对较小,常渗透系数Kz在固结初期影响显著。本文结果对模型参数的取值、反演、随机分析以及固结沉降的估计具有参考价值。The effects of parameters in the finite element analysis of Biot consolidation with Dun - Chang model on consolidation of the soft ground are studied by the method of orthogonal experiment. All the parameters are selected randomly in the analysis. The conclusions are： k,c,G,φ and F play vital roles during consolidation procedure; Pc has an important effect at the beginning ; Rf has little effect on consolidation if variations of the other parameters are high. The constant coefficient of permeability Kz has prominent influence at the initial stage. The results can be used as reference for test of model parameters, back analysis, stochastic study and estimation of the soft consolidation.

关 键 词：比奥平面固结有限元 邓肯-张模型参数 正交分析 水平位移 竖向位移 

分 类 号：P642.1[天文地球—工程地质学]