往复荷载作用下冻土应力应变关系的研究  

A Study of Stress-Strain Relation of Frozen Soil under to-and-fro Loading

作　　者：姜忠宇[1] 孙建忠[2] 汤精明[1] 

机构地区：[1]安徽工程科技学院机械工程系,安徽芜湖241000 [2]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《冰川冻土》2008年第2期301-305,共5页Journal of Glaciology and Geocryology

基　　金：安徽省高校青年教师科研资助计划项目(2006jql154);安徽工程科技学院研究项目(2007yjy23)资助

摘　　要：冻土的力学参数是与加载条件和加载历史以及温度、含水量等多方面因素有关的过程量,在不同的应力环境中表现出不同的力学特性.研究了加载方式、含水量以及温度对不同试样类型的力学性能的影响.结果表明:不同加载方式对两种试样的抗压强度比值有大致相当的影响,而试样含水量与温度的变化对其比值影响甚微;加载方式的不同使试样破坏应变的比值有较大范围变化,且与试样含水量及温度密切相关.The mechanical parameters of frozen soil have different characteristics depending on stress circumstances. There are many factors affecting the process of loading, such as environment, time, temperature and moisture content. In this paper, the influences of loading method, moisture content and temperature on the mechanical parameters of different sample types are studied. The experiment demonstrates that different loading methods have approximately same effect on the ratio of compressive strength, while the changes of moisture content and temperature have not so much effect. Different loading methods can affect the ratio of failure strain largely. The ratio also has a tightly relation with samples moisture content and environmental temperature.

关 键 词：冻土力学 加载 卸载 应力-应变曲线 抗压强度 破坏变形 

分 类 号：O347.3[理学—固体力学] P642.14[理学—力学]