Temperature Drop Model Based on Discrete Element Method for Simulating Damage of Bio-Cemented Sand by Cold Wave

作     者：DUAN Yu KIM Cholgyong XU Guobin 段宇;金哲景;徐国宾

作者机构：State Key Laboratory of Hydraulic Engineering Simulation and SafetyTianjin UniversityTianjin 300350China School of Civil EngineeringTianjin UniversityTianjin 300350China School of hydraulic EngineeringHydraulic and Dynamic of Hamhung UniversityHamhungDPRK 

出 版 物：《Journal of Shanghai Jiaotong university(Science)》 (上海交通大学学报（英文版）)

年 卷 期：2019年第24卷第6期

页      面：789-798页

核心收录：

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 

基　　金：Foundation item:the National Natural Science Foundation of China(No.51621096) 

主　　题：cold wave microbial-induced calcium carbonate precipitation(MICP) calcite discrete element method(DEM) crack 

摘      要：The microbially cemented sand(MCS)material is a new building material with a broad research prospect,although the nationwide cold wave affects the mechanical properties of the material in the practical *** microstructure of MCS is obtained by computed tomography(CT)and scanning electron microscope(SEM);the thermodynamic mathematical model is established by considering the particle shapes and bonding state based on direct element method(DEM).By studying the damage of temperature drop amplitude and cooling duration to MCS material under the effect of cold wave,the following conclusions are *** a given temperature drop range,an increased cooling time can aggravate the material *** addition,a rapid drop in temperature can cause serious damage to the *** cracks generated by the temperature stress propagate in the direction of the weaker component of the *** DEM model can be better used to analyze the damage of the MCS structure induced by cold wave.