大理岩常规三轴压缩全过程试验和本构方程的研究  

STUDY ON CONVENTIONAL TRIAXIAL COMPRESSION TEST OF COMPLETE PROCESS FOR MARBLE AND ITS CONSTITUTIVE EQUATION

作　　者：卢允德[1,2] 葛修润 蒋宇[1] 任建喜[1,4] 

机构地区：[1]上海交通大学建工学院 [2]武汉科技大学理学院武汉430081 [3]中国科学院武汉岩土力学研究所武汉430071 [4]西安科技学院西安710054

出　　处：《岩石力学与工程学报》2004年第15期2489-2493,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金(10172057;10202019);中国博士后基金(2001年)资助项目。

摘　　要：利用RMB-150B岩石力学试验系统研究了雅安大理岩围压为0～30 MPa的应力-应变全过程曲线,建立了屈服强度、峰值强度、残余强度和围压的关系,根据塑性力学的相关理论,提出双线性弹性-线性软化-残余理想塑性四线性模型,并应用于大理岩,得到了大理岩各段的本构方程,并特别讨论了软化段。结果表明,理论模型和试验结果吻合较好。Using the RMB-150B, the rock mechanics test system, the complete stress-strain curves of marble from Ya'an, Sichuan province, and the relationship among the yield strength, peak strength, residual strength and the confining pressure are obtained. Based on the plastic theories, the bilinear elastic-linear strain softening-residual ideal plastic model is put forward and applied to marble, and the constitutive equation of marble is obtained. The constitutive equation of strain softening is discussed especially. The results indicate that the theoretic model fits well with the test.

关 键 词：岩石力学 三轴压缩试验 本构模型 线性软化 双线性弹性 塑性力学 

分 类 号：TU45[建筑科学—岩土工程]