基于材料的钢筋混凝土构件的损伤模型研究  

Research on damage model of RC member based on material

作　　者：陈杰 张耀庭[2] CHEN Jie;ZHANG Yaoting(Shanghai Electric Power Design Institute Co.,Ltd.,Shanghai 200000,China;School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]上海电力设计院有限公司,上海200000 [2]华中科技大学土木工程与水利学院,湖北武汉430074

出　　处：《混凝土》2022年第10期23-27,共5页Concrete

基　　金：国家自然科学基金项目(51278218)。

摘　　要：为合理地评估钢筋混凝土结构构件在地震作用下的损伤程度,国内外学者提出了大量的结构损伤分析模型,但是,这些模型大多是通过钢筋混凝土结构构件的整体力学性能指标而建立的;随着计算技术的发展,以截面纤维离散化为基础的结构分析已成为钢筋混凝土结构分析的重要发展方向,因而,有必要基于材料层次的损伤模型与分析方法来度量钢筋混凝土结构构件的损伤程度。为此,首先从材料本构出发,建立了混凝土和钢筋材料损伤指标的计算模型及方法;然后,通过引入加权系数,即:将所确定的钢筋和混凝土材料的损伤指标作为计算构件损伤指标的加权系数,从而确定出钢筋混凝土构件损伤指标;最后,以OpenSees软件为平台,利用该方法对Peer试验数据库中的钢筋混凝土柱的拟静力试验过程进行了模拟分析,计算表明:所采用的基于材料层次的损伤模型及计算方法,能够很好并定量的地评估钢筋混凝土试验柱的损伤。In order to reasonably evaluate the of reinforced concrete members under earthquake,a lot of damage models of structure were put forward,however,these models were set up by the overall mechanical properties of RC structure or members.With the development of computing technology,the structure analysis based on discreting cross-section fiber has been the important development direction of RC structure analysis.Hence,it is necessary to evaluate the damage of reinforced concrete members based on material and analysis method.Firstly,the calculation model of damage index of reinforcement and concrete is set up start from the material constitutive,then the calculation method of damage index of reinforced concrete members were respectively established by introducing the weighted coefficient.Lastly,based on Open Sees,simulations on RC column in PEER structural performance database under monotonic loading and cyclic loading were conducted respectively.The results indicated that the damage models based on materials can evaluate damage process of the RC column effectively.

关 键 词：钢筋混凝土 损伤模型 材料本构 纤维单元 加权系数 

分 类 号：TU528.571[建筑科学—建筑技术科学]