土体应力松弛试验及模型研究进展  

State-Of-the-Art of the Stress Relaxation Tests and Constitutive Model Research

作　　者：杨坪[1,2] 宋立 薛守宝 姜涛[1] YANG Ping SONG Li XUE Shoubao JIANG Tao(Department of Geoteehnieal Engineering, Tongii University, Shanghai Z00092 Key Laboratory of Geoteehnieal and Underground Engineering of Ministry of Edueation, Tongii University, Shanghai 200092)

机构地区：[1]同济大学土木工程学院地下建筑与工程系,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《土工基础》2017年第2期206-210,共5页Soil Engineering and Foundation

基　　金：上海自然科学基金项目(No.14ZR1442800);国家自然科学基金项目(No.41672274)

摘　　要：土体流变对工程长期性能的影响是一个不容忽视的因素,应力松弛作为一种典型的流变现象目前已经引起研究者的重视。从应力松弛试验的试验方法、影响因素及本构模型三个方面对土体应力松弛研究近况进行了分析讨论。现有文献表明,目前土体应力松弛理论发展尚未完善;模型理论参数较多,求解困难;经验模型,缺乏理论依据。因此,优化应力松弛分析方法,找到实用有效的分析方式;各类挡住结构上侧向应力的应力松弛规律研究,均为未来的重要研究方向。Effects of the soil rheology on the long-term performance of engineering project is an important factor that cannot be ignored. And the stress relaxation, as a typical rheology phenomenon, has already attracted the attention of many researches. In the paper, studies on stress relaxation tests, influence factors of the stress relaxation and the constitutive models are evalua- ted and discussed. The available literatures suggest that the current theories on the stress relaxation of the soils are not fully developed. Specifically, the constitutive models are difficult to be applied due to the too many variables to be determined. Whereas, the empirical formulas are lack of theoretical basis. As a result, the direction of the research should be as follows： optimization analysis of the stress relaxation and the stress relaxation of lateral stress on the different retaining structures.

关 键 词：应力松弛 松弛模型 侧向应力 

分 类 号：TU411[建筑科学—岩土工程]