摘要
屈曲约束支撑是一种消能减震构件,在受拉和受压两种状态下都能达到屈服。以某框架结构教学楼为研究对象,阐述屈曲约束支撑在不规则混凝土框架结构加固工程中的应用。采用ABAQUS有限元软件,对在单向、双向和三向7度罕遇地震作用下加固前后的教学楼进行弹塑性动力时程地震反应分析研究。通过对比结构加固前后的层间位移角和顶层残余位移以及BRB的滞回耗能,以评价不规则钢筋混凝土框架结构-BRB体系的抗震性能。数值结果表明,合理设置屈曲约束耗能支撑能够提升不规则结构的抗震性能。
The buckling-restrained braces （BRBs） can reach yielding in any state of both tension and compression,thus being a type of passive hysteretic device. In order to demonstrate BRBs to be a good candidate in seismic retrofit applications,a frame structure school building is taken into account as a research object. Specifically, using ABAQUS finite element software, elasto-plastie seismic response analysis of an asymmetric-plan reinforced concrete frame with and without BRBs has been implemented subjected to unidirectional, bidirectional, and three-directional rare earthquakes of the fortification intensity 7. Through evaluating the inter-storey drifts and permanent （or residual） deformations of an asymmetric-plan reinforced concrete frame with and without BRBs as well as hysteretic energy dissipation characteristics of BRBs, seismic performances of the asymmetric-plan reinforced concrete frame retrofitted by BRBs has been studied. Numerical results show that reasonably setting BRBs can enhance seismic performances of the asymmetric-plan reinforced concrete frame.
作者
郑晓芬
孙汇涓
汪英俊
徐化喜
李春祥
ZHENG Xiaofen SUN Huijuan WANG Yingjun XU Huaxi LI Chunxiang(Department of Structural Engineering, Tongji University, Shanghai 200092, China Department of Civil Engineering, Shanghai University, Shanghai 200044, China Shanghai Jihong Steel Structure Engineering Co. ,Ltd. , Shanghai 200090, China)
出处
《结构工程师》
北大核心
2016年第4期139-146,共8页
Structural Engineers
关键词
屈曲约束支撑
不规则钢筋混凝土框架结构
ABAQUS有限元软件
抗震性能
弹塑性动力时程分析
buckling restrained brace, asymmetric-plan reinforced concrete frame structure, finite elementsoftware, seismic performance, elasto-plastic time-history analysis
