黄土弹塑性损伤本构模型基本构架研究  

The framework of elasto-plastical damage constitutive models of loess

作　　者：夏旺民[1,2] 郭增玉[3] 

机构地区：[1]中交第一公路勘察设计研究院,西安710056 [2]西安中交公路岩土工程有限责任公司,西安710056 [3]西安理工大学水利水电学院,西安710048

出　　处：《岩土力学》2007年第S1期241-243,共3页Rock and Soil Mechanics

摘　　要：黄土由于特殊的结构性,其变形和强度受到力和水的共同影响,因此对于黄土的力学研究必须同时考虑力和水的作用。根据热力学和连续损伤力学理论以及黄土在加载和增湿作用下的能量转换过程及结构破损过程分析,提出了黄土的损伤变量、加载损伤和增湿损伤的定义以及它们之间关系,并提出由塑性、加载损伤和增湿损伤三部分组成可以考虑加载和增湿作用的黄土弹塑性损伤本构模型的基本构架,为建立黄土的结构性模型提供一种新的思路。Because of the special structure characteristic,the deformation and strength of loess are affected by water and load together,so the research of loess mechanics must take account of water and load effect together. In this paper based on the theory of thermodynamics and continuum damage mechanics and the energy conversion of loess in load and moistening,the damage variable,load damage and moistening damage of loess and their relations are put forward. The basic framework of the elasto-plastic damage models of loess which are made up of plastic,load damage and moistening damage are also put forward. This is a new method to put forward the structure model of loess.

关 键 词：黄土 结构性 增湿损伤 加载损伤 弹塑性 

分 类 号：TU444[建筑科学—岩土工程]