基于能量原理盐岩的损伤本构模型  

Damage constitutive model of rock salt based on energy principles

作　　者：郭建强[1,2] 刘新荣[1,2] 王景环[3] 余瑜[1,2] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [3]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400030

出　　处：《中南大学学报（自然科学版）》2013年第12期5045-5050,共6页Journal of Central South University:Science and Technology

基　　金：国家重点基础研究发展计划("973"计划)项目(2009CB724606);中央高校研究生创新基金资助项目(0218005204101)

摘　　要：通过对外力功、能量耗散以及能量释放之间内在联系的分析,并结合在盐岩力学特性和基于能量原理岩石强度与破坏方面已取得的结果,建立基于能量原理盐岩的损伤本构模型。为验证损伤方程的可行性,进行单轴和三轴条件下盐岩力学特性试验研究。研究结果表明:由于该模型仅需确定常规岩石力学参数,物理力学意义明确,能充分模拟盐岩单轴情况下应变软化和三轴情况下应变硬化的全过程,该模型模拟结果与实测结果吻合的较好。Based on the discussion of the intrinsic relation between external work, energy dissipation, and energy release and a series of the research achievements related to mechanical behavior of rock salt, and the damage formulation based on energy principle was deducted. In order to verify the viability of the formulation, the experiments of rock salt under different confining pressure were carried out. Through the experiment, the results show that it can also reflect softening characteristics under uniaxial compression and hardening under triaxial compression and it has less parameters and is simple. Finally, the feasibility of the model is verified through comparative analysis between the experimental results and the theoretical value.

关 键 词：盐岩 芒硝 能量原理 损伤变量 本构模型 

分 类 号：TU443[建筑科学—岩土工程]