结构性土的次塑性扰动状态模型  

A hypoplasticity disturbed state model for structured soils

作　　者：周成[1] 沈珠江[1] 陈生水[1] 陈铁林[1] 

机构地区：[1]南京水利科学研究院岩土工程研究所,江苏南京210024

出　　处：《岩土工程学报》2004年第4期435-439,共5页Chinese Journal of Geotechnical Engineering

摘　　要：通过定义与应力偏转角α相关的归一化应力比η,引入扰动状态概念并基于次塑性理论,按照由特殊(单调加载)到一般(复杂荷载)的思路建立了次塑性扰动状态弹塑性损伤模型,用来描述单调及复杂荷载作用下结构性土的强度和变形特性。利用该模型对单调及循环荷载作用下结构性土的强度和变形特性进行了模拟,并推导出相应的弹塑性损伤矩阵,以便有限元分析使用。Normalized stress ratio ? is defined relate d to stress turning angle á . Bas ed on the disturbed state concept and hypoplasticity theory, the elasto-plasti c and damage model is developed by means of the method from simple loading to comp lex loading. The model could be used to describe the strength and deformation c har acteristic of structured soils under simple and complex loading. The correspondi ng elasto-plastic and damage matrix is derived so that the model can be implem ented into finite element code.

关 键 词：结构性土 本构模型 扰动状态 结构破损 次塑性 

分 类 号：TU43[建筑科学—岩土工程]