基于旁压试验反分析土体本构参数的有限元方法  

FEM for inverse analysis on soil constitutive parameters based on pressuremeter test

作　　者：马怀发[1] 孔俐丽[2] 侯淑媛[1,3] 刘小生[4] 

机构地区：[1]北京工业大学 [2]江西省水利规划设计院 [3]中国水利水电科学研究院,北京100044 [4]中国水利水电科学研究院

出　　处：《水利水电技术》2005年第6期58-60,64,共4页Water Resources and Hydropower Engineering

摘　　要：基于旁压仪试验原理,提出了反分析土体本构参数的有限元分析模型.同时依据在旁压力作用下土体的变形特点给出,并简化了土体有限元的刚度矩阵.利用阻尼最小二乘法非线性优化理论编制了反分析计算程序,并根据土体的线弹性模型和邓肯—张EB模型,进行了模型参数反分析,其结果合理,从而验证本文所提出的方法的可行性.Based on the principle of the pressuremeter test,a FEM model for the inversion analysis on the soil constitutive parameters is presented,in which the finite element stiff matrix for the soil is deduced and simplified according to the deformation characteristics of soil under the pressure.A computing program is developed relied on the non-linear optimization theory with damping least squares.The linear elastic and Duncan-chang E-B constitutive model for soil are adopted to verify the method presented herein.

关 键 词：旁压试验 本构模型 非线性优化 反分析 有限元方法 

分 类 号：TU413.4[建筑科学—岩土工程]