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 Chong SHI;Yiping ZHANG;Yulong ZHANG;Xiao CHEN;Junxiong YANG

作者机构：Key Laboratory of Ministry of Education for Geomechanics and Embankment EngineeringHohai UniversityNanjing 210098China College of Civil and Transportation EngineeringHohai UniversityNanjing 210098China Key Laboratory of Ministry of Education on Safe Mining of Deep Metal MinesCollege of Resources and Civil EngineeringNortheastern UniversityShenyang 110819China Department of Civil and Mineral EngineeringUniversity of TorontoToronto M5S1A1Canada 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2023年第17卷第9期

页      面：1413-1427页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 

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). 

主　　题：thermomechanical coupling effect granite improved linear parallel bond model thermal property particle flow code 

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.