考虑温度影响的混凝土弹塑性本构模型  

Elasto-plastic constitutive model of concrete subject to elevated temperatures

作　　者：李亮[1] 杨春旭 吴俊[1,2] 魏朝园 LI Liang;YANG Chunxu;WU Jun;WEI Zhaoyuan(The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100124,China;School of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620, China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室,北京100124 [2]上海工程技术大学城市轨道交通学院,上海201620

出　　处：《混凝土》2018年第5期59-63,共5页Concrete

基　　金：国家重点基础研究发展计划(973计划)项目课题(2015CB058003);北京市自然科学基金资助项目(8172010)

摘　　要：基于弹塑性理论建立了能够考虑温度影响的混凝土弹塑性本构模型,用以描述混凝土在不同温度条件下的力学性能。基于ABAQUS软件平台中的用户材料子程序(UMAT)进行二次开发,完成了该模型的程序实现。通过针对混凝土单元的单轴压缩和双轴压缩的数值试验对该模型进行验证。研究结果表明:建立的弹塑性本构模型能够有效的反映不同温度条件下混凝土材料的力学性能。An elasto-plastic constitutive model for concrete subjected to high temperatures is presented,based on the elasto-plastic theory,to describe the mechanical behavior of concrete under different temperature conditions.Used the user material subroutine UMAT provided by the general software ABAQUS,the elasto-plastic constitutive model is completed.The constitutive model is calibrated with experimental results of uniaxial compression tests and biaxial compression tests.It can be proved that the elasto-plastic constitutive model presented can describe the mechanical properties of concrete under different temperatures accurately.

关 键 词：混凝土 弹塑性 本构模型 温度 UMAT 

分 类 号：TU528.01[建筑科学—建筑技术科学]