岩土中的附加应力和实质应力  

Subsidiary stress and actual stress in rock-soil

作　　者：尚军[1] 冯慧强 伊尧国[2] 李琳[1] 

机构地区：[1]天津城建大学土木工程学院,天津300384 [2]天津城建大学地质与测绘学院,天津300384

出　　处：《辽宁工程技术大学学报（自然科学版）》2016年第4期371-375,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金项目(41172233);天津市科技特派员项目(14JCTPJC00514)

摘　　要：为分析岩土中的附加应力和实质应力,建立科学合理的强度准则和本构模型,根据土结构性形成的条件,给出适用于土的应力状态变量.在既有总应力和附加应力概念的基础上,给出了实质应力的概念.认为控制土强度和本构关系的应力变量不是所谓总应力和附加应力,而是实质应力.在此基础上,分析了三轴实验中的实质应力状态演变和基坑开挖过程中三种应力的变化过程,从而进一步印证了实质应力的合理性.To analysis the subsidiary stress and total stress in soil and build reasonable strength criterion and constitutive model, the consideration of the form of soil structure and afford suitable stress state variate-value is necessary. The concept of actual stress is present on the basis of the formation condition of the soil structure as well as the concept of total stress and subsidiary stress. The control of soil strength and constitutive relationship should be actual stress rather than total stress and subsidiary stress. On this basis, actual stress development in triaxial test and three stress variations in the process of foundation excavation are analyzed, and the rational of actual stress is further verified.

关 键 词：应力表示 总应力 附加应力 实质应力 本构关系 

分 类 号：TU411.92[建筑科学—岩土工程]