增设可恢复功能剪力墙加固框架的剪力分析  

Shear Analysis of Frame Structure Retrofitted with Resilient Shear Wall

作　　者：蒋洪波 陈孔阳 葛文杰[1] 孙建[3] JIANG Hong-bo;CHEN Kong-yang;GE Wen-jie;SUN Jian(College of Civil Science and Engineering,Yangzhou University,Yangzhou Jiangsu 225127 China;Suzhou Electric Power Design and Research Institute Co.,Ltd,State Grid Suzhou Power Supply Company,State Grid Jiangsu Electric Power Co.,Ltd,Suzhou Jiangsu 215011 China;Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education,Southeast University,NanjingJiangsu 211189 China)

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225127 [2]苏州电力设计研究院有限公司,国网江苏省电力有限公司苏州供电分公司,江苏苏州215011 [3]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京211189

出　　处：《江苏建筑》2021年第S01期8-10,14,共4页Jiangsu Construction

摘　　要：可恢复功能剪力墙可与框架形成框架-摇摆剪力墙结构或框架-自复位剪力墙结构,从而有效提升框架结构的抗震性能,避免薄弱层的出现。目前已有少量增设可恢复功能剪力墙加固既有框架结构的工程应用。为研究增设可恢复功能剪力墙加固框架的影响,首先提出了框架-可恢复功能剪力墙的分布参数模型,在此基础上使用模型对加固前后框架分担的剪力进行了对比分析。结果表明,均布外荷载作用下,在低楼层,加固后框架承受的水平剪力小于加固前框架;而在高楼层,加固后框架承受的水平剪力则大于加固前框架,该抗剪需求缺口受刚度特征值λ和Rf(反映墙体底部约束程度与剪力墙刚度相对关系的特征值)影响。Cooperated with frame structure,resilient shear wall can form frame-rocking shear wall structure or frame-self-centering shear wall structure.Both structures can effectively improve the seismic performance of the frame structure and avoid soft story.At present,there have been a few engineering applications that retrofitted existing frames with resilient shear walls.In order to study the effect of the retrofit,a distributed parameter model for frame-resilient shear wall was proposed,then the model was used to analyze and compare the shear force in the frame before and after the retrofit.The results show that the low stories in retrofitted frame have lower shear demand than the original frame,while high stories have higher greater demand than the original frame,the demand gap is affected by stiffness characteristic value and(stiffness characteristic value is referred to as the base-to-wall stiffness ratio).

关 键 词：加固 可恢复功能墙 框架结构 分布参数模型 抗剪需求 

分 类 号：TU398.2[建筑科学—结构工程]