城市固体废弃物的剪切强度机理及本构关系  

Shear strength mechanism and constitutive model of municipal solid waste

作　　者：冯世进[1] 陈云敏[2] 高丽亚[3] 高广运[1] 

机构地区：[1]同济大学地下建筑与工程系 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071 [3]同济大学建筑工程系,上海200092

出　　处：《岩土力学》2007年第12期2524-2528,共5页Rock and Soil Mechanics

基　　金：国家杰出青年科学基金资助项目(No.50425825);中国科学院岩土力学重点实验室开放课题资助项目(No.z110604);同济大学青年优秀人才培养行动计划资助项目;光大环保创新基金资助项目

摘　　要：根据城市固体废弃物(简称MSW)的大三轴固结排水剪试验结果,延伸岩土工程中研究土体的概念和方法,研究MSW的剪切强度机制。MSW与大变形相关的强度特性主要是由于含有大量的纤维状成分所致,在剪切过程中试样总的抗剪能力由剪切面上的摩擦力和纤维状加筋相的拉力所产生。MSW的摩擦强度主要由3部分构成:纤维状成分与土颗粒之间的摩擦,纤维状成分之间的摩擦,和土颗粒之间的摩擦。基于MSW的剪切强度特性,采用邓肯-张本构模型来描述MSW的应力-应变关系。The consolidation drained shear tests for municipal solid waste （MSW） samples were conducted using large-scale triaxial apparatus： Based on the test results using traditional geotechnical concepts and methods, the shear strength mechanism of MSW is investigated. The shear strength properties of MSW related to large deformation mainly resulted from the reinforcing effect of fiber materials .The shear resistance of MSW includes friction function and tensile force provided by fiber materials. The friction strength of MSW is composed of three parts： the friction function between fiber phase and particle phase, the friction one between fiber phases, and the friction one between particle phases. Based on the shear strength property of MSW, the stress-strain curve is simulated by Duncan-Chang constitutive model.

关 键 词：城市固体废弃物 剪切强度 摩擦角 黏聚力 本构模型 

分 类 号：TU443[建筑科学—岩土工程]