基于变形及滞回耗能的RC框剪结构地震损伤评估

发布时间：2018-01-07 16:03

本文关键词：基于变形及滞回耗能的RC框剪结构地震损伤评估　出处：《湖南大学学报(自然科学版)》2017年11期 　论文类型：期刊论文

【摘要】：为了研究RC框剪结构在地震作用下的损伤程度,通过引入基于结构广义刚度的构件重要性指标,提出考虑构件重要程度的地震损伤评估方法.首先,利用Perform-3D对RC框剪结构进行弹塑性时程分析,得到RC框剪结构的耗能分布模式.在此基础上,以地震变形、滞回耗能为基本参数,采用双参数构件损伤模型得到构件的损伤指数,利用基于构件重要性指标的楼层损伤模型得到楼层的损伤指数.最后,结合不同地震峰值加速度下结构的损伤指数、结构损伤程度与损伤指数范围的关系,评估结构在不同地震峰值加速度下的损伤程度.计算结果表明,考虑构件重要程度的地震损伤评估法,可以同时体现构件损伤程度与构件重要程度对楼层损伤的影响,可用于RC框剪结构的损伤评估.
[Abstract]:In order to study the damage degree of RC frame-shear structure under earthquake action, an earthquake damage assessment method considering the importance degree of RC frame shear structure is proposed by introducing the component importance index based on the generalized stiffness of the structure. The elastic-plastic time-history analysis of RC frame-shear structure is carried out by using Perform-3D, and the energy dissipation mode of RC frame-shear structure is obtained. On this basis, seismic deformation and hysteretic energy dissipation are taken as the basic parameters. The damage index of the component is obtained by using the two-parameter damage model, and the damage index of the floor is obtained by the damage model based on the component importance index. Combined with the damage index of the structure under different peak acceleration and the relation between the damage degree and the damage index range, the damage degree of the structure under the different peak acceleration is evaluated. The calculation results show that. The seismic damage assessment method, which considers the importance of the members, can reflect the influence of the damage degree of the members and the importance of the members on the floor damage, and can be used to evaluate the damage of RC frame shear structures.
【作者单位】：兰州理工大学防震减灾研究所;兰州理工大学西部土木工程防灾减灾教育部工程研究中心;
【基金】：国家自然科学基金资助项目(51778276,51578274)~~
【分类号】：TU398.2
【正文快照】： 钢筋混凝土框架剪力墙结构以其优良的抗震性能被广泛应用于实际工程,目前对这类结构的抗震性能评估多以位移为指标[1-3],但在框架剪力墙结构的震害调查及理论研究中发现[4],这类结构的破坏主要有两方面原因:一方面是由于滞回耗能过大,底层剪力墙产生斜向裂缝、根部混凝土被压

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