支撑布置形式对防屈曲支撑加固钢筋混凝土框架结构抗震性能的影响研究  

THE INFLUENCE OF LINK BEAM ON THE SEISMIC PERFORMANCE OF ECCENTRICALLY BUCKLING-RESTRAINED BRACED FRAME STRUCTURE

作　　者：刘如月[1] 杨勇[1] 王婷[1] 伊波松 马晨光[1] 韦超谋 叶明坤 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]柳州东方工程橡胶制品有限公司,广西柳州545005

出　　处：《工业建筑》2016年第4期26-30,35,共6页Industrial Construction

基　　金：陕西省教育厅科技计划项目(14JF014);柳州欧维姆工程机械有限公司科技项目;陕西省重点科技创新团队计划(2014kct-31)

摘　　要：中心支撑结构是目前较为常见的一种普通框架支撑结构体系,但其与梁柱对中时容易产生偏差,使得梁段局部产生较大的剪力而发生剪切破坏。与中心支撑结构相比,偏心支撑结构的耗能段解决了对中问题,适用于大跨结构,且可有效降低结构体系在罕遇地震下的反应,耗能段的变形可以吸收一部分能量,在塑性阶段更好地保护主体。从层间角度出发,通过拟静力试验对比防屈曲中心支撑框架和防屈曲偏心支撑框架结构的滞回曲线、骨架曲线、刚度退化等在不同层间的区别,研究耗能梁段对于防屈曲偏心支撑框架结构的抗震性能影响。研究结果表明:相对于中心支撑,偏心支撑不仅适用范围更广,更有利于提高结构的抗震性能,保护主体结构,延长结构抗震持时,有利于结构的防连续倒塌。Concentrically-braced frame（ Abbreviated as CBF） is one of the most common style of ordinary bracedframe,but there always exits deviation in centring,which leads to the larger shear force or even brings out shear failure locally. Compared with CBF,the eccentrically-braced frame（ Abbreviated as EBF） solves the problem of centring owing to the link beam,and it＇s suitable for larger span structure,meanwhile,the link beam can reduce the seismic response and protect the main structure by absorbing the energy during the plastic period. The paper focused on the inter-story behavior,analyzing the inter-story distinction on the aspect of hysteretic loop,skeleton curve,stiffness degradation,etc and further discussed the impact caused by the link beam. It indicated that,compared with the concentric brace,the eccentric brace not only had more wider range of application,but also benefited the seismic behavior enhancement of structure,protecting the main structure,prolonging the duration,as well as avoiding the progressive collapse.

关 键 词：防屈曲支撑 中心支撑 偏心支撑 钢筋混凝土框架 加固 抗震性能 

分 类 号：TU375.4[建筑科学—结构工程] TU352.11