Numerical manifold method for thermo-mechanical coupling simulation of fractured rock mass  

作　　者：Jiawei Liang Defu Tong Fei Tan Xiongwei Yi Junpeng Zou Jiahe Lv 

机构地区：[1]Faculty of Engineering,China University of Geosciences,Wuhan,430074,China [2]Department of Civil Engineering,Monash University,Clayton,VIC,3800,Australia [3]Badong National Observation and Research Station of Geohazards,China University of Geoscience,Wuhan,430074,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2024年第6期1977-1992,共16页岩石力学与岩土工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.42277165);the Fundamental Research Funds for the Central Universities,China University of Geosciences(Wuhan)(Grant No.CUGCJ1821);the National Overseas Study Fund(Grant No.202106410040).

摘　　要：As a calculation method based on the Galerkin variation,the numerical manifold method(NMM)adopts a double covering system,which can easily deal with discontinuous deformation problems and has a high calculation accuracy.Aiming at the thermo-mechanical(TM)coupling problem of fractured rock masses,this study uses the NMM to simulate the processes of crack initiation and propagation in a rock mass under the influence of temperature field,deduces related system equations,and proposes a penalty function method to deal with boundary conditions.Numerical examples are employed to confirm the effectiveness and high accuracy of this method.By the thermal stress analysis of a thick-walled cylinder(TWC),the simulation of cracking in the TWC under heating and cooling conditions,and the simulation of thermal cracking of the SwedishÄspöPillar Stability Experiment(APSE)rock column,the thermal stress,and TM coupling are obtained.The numerical simulation results are in good agreement with the test data and other numerical results,thus verifying the effectiveness of the NMM in dealing with thermal stress and crack propagation problems of fractured rock masses.

关 键 词：Heat conduction Fractured rock mass Crack propagation Galerkin variation Numerical manifold method(NMM) 

分 类 号：TU45[建筑科学—岩土工程]