Microdamage study of granite under thermomechanical coupling based on the particle flow code  

作　　者：Chong SHI Yiping ZHANG Yulong ZHANG Xiao CHEN Junxiong YANG 

机构地区：[1]Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China [2]College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China [3]Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,College of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China [4]Department of Civil and Mineral Engineering,University of Toronto,Toronto M5S1A1,Canada

出　　处：《Frontiers of Structural and Civil Engineering》2023年第9期1413-1427,共15页结构与土木工程前沿（英文版）

基　　金：supported by the Postgraduate Research&Practice Innovation Program of Jiangsu Province (No.KYCX21_0494);the National Natural Science Foundation of China (Grant Nos.51679071 and 41831278);the Key Laboratory of the Ministry of Education on Safe Mining of Deep Metal Mines (No.DM2019K02).

摘　　要：The thermomechanical coupling of rocks refers to the interaction between the mechanical and thermodynamic behaviors of rocks induced by temperature changes.The study of this coupling interaction is essential for understanding the mechanical and thermodynamic properties of the surrounding rocks in underground engineering.In this study,an improved temperature-dependent linear parallel bond model is introduced under the framework of a particle flow simulation.A series of numerical thermomechanical coupling tests are then conducted to calibrate the micro-parameters of the proposed model by considering the mechanical behavior of the rock under different thermomechanical loadings.Good agreement between the numerical results and experimental data are obtained,particularly in terms of the compression,tension,and elastic responses of granite.With this improved model,the thermodynamic response and underlying cracking behavior of a deep-buried tunnel under different thermal loading conditions are investigated and discussed in detail.

关 键 词：thermomechanical coupling effect GRANITE improved linear parallel bond model thermal property particle flow code 

分 类 号：TU45[建筑科学—岩土工程]