防屈曲单斜支撑加固钢筋混凝土框架抗震性能试验研究  

EXPERIMENTAL STUDY OF SEISMIC BEHAVIOR OF REINFORCED CONCRETE FRAME RETROFITTED WITH SINGLE-DIAGONAL BUCKLING-RESTRAINED BRACES

作　　者：马晨光[1] 杨勇[1] 刘如月[1] 伊波松 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1-7,共7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：防屈曲支撑是一种耗能性能良好、减震效果显著的新型支撑。分别对1榀加设防屈曲单斜支撑的钢筋混凝土框架和1榀未设置防屈曲支撑的钢筋混凝土框架进行拟静力试验研究,对两榀框架试件的破坏过程、破坏机理、荷载-侧移滞回曲线、骨架曲线、层间刚度、耗能和等效黏滞阻尼比等试验结果进行分析与比较,考察防屈曲单斜支撑对钢筋混凝土框架抗震性能的改善效果。研究结果表明:防屈曲支撑能有效提高钢筋混凝土框架抗震性能,加设防屈曲支撑的钢筋混凝土框架结构刚度、承载能力、耗能和阻尼比均显著增大,具有良好的抗震性能。Buckling-restrained brace is an innovate brace with excellent energy dissipation behavior and seismic performance. Two frame specimens,including a reinforced concrete frame with BRB and one without for comparison,were tested under low reversed cyclic pseudo-static loading,respectively. The test demonstrated comparison of the characteristics between two frame specimens,such as concrete element cracking,lateral load-displacement loop,skeleton curve, lateral stiffness, energy-dissipating performance, and the equivalent viscous damping ratio to investigate the effect of single-diagonal brace. The results showed that single-diagonal buckling-restrained braces could effectively improve the seismic performance of the reinforced concrete frame with plumped hysteretic curve,larger lateral stiffness,and a significant increase in energy dissipation and damping ratio.

关 键 词：防屈曲支撑 单斜撑 加固 钢筋混凝土框架 抗震性能 试验研究 

分 类 号：TU352.11[建筑科学—结构工程] TU375.4