考虑填充墙刚度的RC框架结构抗震设计方法研究  

Study on seismic design method of RC frame structure considering infill wall stiffness

作　　者：祝岳 杨伟松[1] 李海生 何福 Zhu Yue;Yang Wei-song;Li Hai-sheng;He Fu(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China;Ronghua(Qingdao)Construction Technology Co.Ltd,Qingdao 266033,China;Institute of Disaster Prevention,Key Laboratory of Building Collapse Mechanism and Disaster Prevention,China Earthquake Administration,Sanhe 065201,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]荣华(青岛)建设科技有限公司,山东青岛266033 [3]防灾科技学院中国地震局建筑物破坏机理与防御重点实验室,河北三河065201

出　　处：《工程抗震与加固改造》2023年第5期64-75,共12页Earthquake Resistant Engineering and Retrofitting

基　　金：国家重点研究发展计划(2017YFC0703600);中国博士后科学基金资助项目(2019M652344);山东省自然科学基金(ZR2020ME246)。

摘　　要：针对填充墙框架结构在地震作用下不同阶段填充墙提供的刚度不同,收集了国内外相关计算公式并建立回归模型进行公式拟合,得到了填充墙不同阶段的抗侧刚度计算方法。通过增设翼墙来解决填充墙框架结构楼层内各榀框架刚度不平衡的情况,设计了4个数值模型(1个原型结构与3个分别基于弹性阶段、屈服阶段、承载力峰值阶段实现刚度平衡设计的翼墙加固结构),通过IDA分析对4个模型进行抗震性能评估。结果表明,考虑填充墙刚度进行刚度平衡设计后的3个模型较原型结构相比:各层最大层间位移角减小,离散性降低,结构抗地震倒塌能力提高。对比分析4个模型结构可得,基于填充墙屈服阶段刚度平衡进行翼墙刚度需求设计的效果最佳。In view of the fact that the stiffness of infilled wall in different stages of the infilled wall frame structure under seismic action is different,by collecting the relevant calculation formulas at home and abroad and establishing the regression model for formula fiting,the stffness calculation methods of different stages of the inflled wall are obtained.By adding wing wall to solve the stiffness imbalance of each frame in the floor of the infilled wall frame structure,four numerical models(a prototype structure and three wing wall reinforcement structures respectively based on elastic stage,plastic stage and peak bearing capacity to achieve stiffness balance design)are designed,and the seismic performances of four models through IDA analysis are evaluated.The results show that,compared with the prototype structure,the three models after considering the stffness of the infll wall for stiffness balance design have the following characteristics:the maximum story drift angle of each layer is reduced,the discreteness is declined,and the seismic collapse resistance of structure is improved.By comparing and analyzing the four models,it can be concluded that based on the stiffness balance of the infill wall at the plastic stage,the effect of the wing wall stiffness requirement design is the best.

关 键 词：填充墙框架结构 翼墙 刚度平衡 IDA分析 抗地震倒塌 

分 类 号：TU375[建筑科学—结构工程]