软土流变试验的数值模拟  

Study on Numerical Simulation of Rheological Test of Soft Soil in Shanghai

作　　者：冯紫良[1] 范厚彬[1] 

机构地区：[1]同济大学地下建筑工程系,上海200092

出　　处：《同济大学学报（自然科学版）》2003年第4期379-382,共4页Journal of Tongji University:Natural Science

基　　金：上海市重点学科基金资助项目

摘　　要：首先讨论了在进行软土工程数值模拟时选取软土流变本构模型的原则 ,然后根据实验室的试验数据提出了一种层叠式的流变模型 ,并利用位移反分析方法求得了土样的有关参数 .由于在进行位移反分析时 ,采用了非线性优化方法 ,为此通过目标函数随各个参数变化的影响分析来确定各设计变量的初始值 .计算实例表明 。In the paper,the criterion of choosing soil constitution law for numerical analysis is discussed firstly;a specific model is then proposed according to the laboratory test of soil samples of the construction site in Shanghai.Soil parameters are determined by using back analysis from measurements of soil samples,while the initial values are chosen from a series of influence analysis of soil parameters to the objective function.A calculation example is presented to explain the proposed method.Also the comparison of results of measurements and calculation is offered.

关 键 词：软土 层叠流变模型 粘弹塑性 位移反分析 优化方法 

分 类 号：TU459.4[建筑科学—岩土工程]