A Hybrid Local/Nonlocal Continuum Mechanics Modeling of Damage and Fracture in Concrete Structure at High Temperatures  

作　　者：Runze Song Fei Han Yong Mei Yunhou Sun Ao Zhang 

机构地区：[1]Department of Engineering Mechanics,State Key Laboratory of Structural Analysis for Industrial Equipment,International Research Center for Computational Mechanics,Dalian University of Technology,Dalian,116023,China [2]Institute of Defense Engineering,AMS,Beijing,100036,China

出　　处：《Computer Modeling in Engineering & Sciences》2022年第11期389-412,共24页工程与科学中的计算机建模（英文）

基　　金：the financial support received from the National Natural Science Foundation of China(11872016);National Key Laboratory of Shock Wave and Detonation Physics(JCKYS2021212003);Fundamental Research Funds for the Central Universities(DUT20LAB203);Key Research and Development Project of Liaoning Province(2020JH2/10500003).

摘　　要：This paper proposes a hybrid peridynamic and classical continuum mechanical model for the high-temperature damage and fracture analysis of concrete structures.In this model,we introduce the thermal expansion into peridynamics and then couple it with the thermoelasticity based on the Morphing method.In addition,a thermomechanical constitutive model of peridynamic bond is presented inspired by the classic Mazars model for the quasi-brittle damage evolution of concrete structures under high-temperature conditions.The validity and effectiveness of the proposed model are verified through two-dimensional numerical examples,in which the influence of temperature on the damage behavior of concrete structures is investigated.Furthermore,the thermal effects on the fracture path of concrete structures are analyzed by numerical results.

关 键 词：PERIDYNAMICS continuum mechanics damage and fracture concrete structure THERMOELASTICITY 

分 类 号：TU5[建筑科学—建筑技术科学]