考虑水化学损伤的岩石真三轴蠕变本构模型  

A TRUE TRIAXIAL CREEP CONSTITUTIVE MODEL FOR ROCK CONSIDERING HYDROCHEMICAL DAMAGE

作　　者：陈有亮[1,2] 陈奇键 肖鹏 杜曦 王苏然[5] Chen Youliang;Chen Qijian;Xiao Peng;Du Xi;Wang Suran(Department of Civil Engineering,School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China;Department of Engineering Geology and Hydrogeology,RWTH Aachen University,Aachen 52064,Germany;School of Communications,Southeast University,Nanjing 210096,China;School of Civil and Environmental Engineering,University of New South Wales,Sydney 2052,Australia;Department of Underground Architecture and Engineering,Tongji University,Shanghai 200093,China)

机构地区：[1]上海理工大学环境与建筑学院土木工程系,上海200093 [2]亚琛工业大学工程地质与水文地质系,德国亚琛52064 [3]东南大学交通学院,南京210096 [4]新南威尔士大学土木与环境工程学院,澳大利亚悉尼2052 [5]同济大学地下建筑与工程系,上海200093

出　　处：《力学学报》2023年第1期159-168,共10页Chinese Journal of Theoretical and Applied Mechanics

基　　金：国家自然科学基金(10872133);上海市软科学研究领域重点资助项目(18692106100)。

摘　　要：为了准确描述岩石在酸性环境下真三轴蠕变行为的各阶段特征,基于水岩作用的化学动力学理论,定义了考虑PH值与时间的化学损伤因子,将弹性体,非线性Kelvin体,线性Kelvin体和黏弹塑性体进行串联,并考虑岩石在真三轴应力作用下的实际情况,建立岩石酸腐与真三轴应力耦合作用下的损伤蠕变本构模型,通过已有的蠕变试验数据对该模型进行参数辨识与验证,并通过数据拟合得到岩石在真三轴应力下的屈服面方程,探讨中间主应力对蠕变模型的影响.结果表明,推导的本构模型能很好地描述岩石在酸腐作用下真三轴蠕变行为的各阶段特性,验证了其合理性与准确性.In order to accurately describe the characteristics of each stage of rock creep behavior under the combined action of acid environment and true triaxial stress,based on the chemical kinetic theory of water-rock interaction,a chemical damage factor considering p H and time is defined.The elastic body,nonlinear Kelvin body,linear Kelvin body,and visco-elastic-plastic body are connected in series,and the actual situation under the action of true triaxial stress is considered at the same time,a damage-creep constitutive model considering the coupling of rock acid corrosion and true triaxial stress is established.The parameters of the deduced model are identified and verified with the existing experimental research results.The yield surface equation of rock under true triaxial stress is obtained by data fitting,and the influence of intermediate principal stress on the creep model is discussed.The results show that the derived constitutive model can well reflect creep properties of the rock under acid corrosion The true triaxial creep characteristics under the action have certain rationality and practicability.

关 键 词：化学腐蚀 真三轴应力 非线性 岩石蠕变本构 中间主应力 

分 类 号：TD313[矿业工程—矿井建设]