Experimental investigation of BRB with transverse rib restraints  

横肋约束防屈曲支撑试验研究(英文)

作　　者：黄镇[1] 李宗京[1] 丁婷[2] 

机构地区：[1]东南大学土木工程学院,南京210096 [2]江苏省邮电规划设计院有限责任公司,南京210006

出　　处：《Journal of Southeast University(English Edition)》2013年第1期62-65,共4页东南大学学报（英文版）

基　　金：The National Key Technology R&D Program of China during the12th Five-Year Plan Period(No.2012BAJ13B01);the Science and Technology Program of the Ministry of Housing and UrbanRural Development(No.2011-K2-3);the Science and Technology Foundation of Southeast University(No.9205000034);the Priority Academic Program Development of Jiangsu Higher Education Institutions(No.CE01-2-09)

摘　　要：To develop a high performance buckling-restrained brace （BRB） with less weight, an innovative type of the BRB with transverse rib restraints is proposed and studied through experiment. Three BRB specimens are cyclically loaded in the investigation. Specimen 1 adopts a Q235 core member and transverse rib restraints. Specimen 2 adopts a LYP160 low yield point steel core member and transverse rib restraints. Specimen 3 adopts a LYP160 low yield point steel core member and mortar restraint. The experimental results indicate that the transverse rib restraining mode can provide sufficient lateral stiffness for the core member and effectively restrain its buckling. The BRB specimens with a LYP160 core member exhibit better hysteretic performance and energy dissipation capacity than the specimens with a Q235 core member.为研发轻质高性能防屈曲支撑(BRB),提出了一种新型横肋约束防屈曲支撑并对其进行了试验研究.对3组BRB试件进行了低周往复加载试验.试件1采用普通Q235钢核心单元,并采用横向加劲肋约束;试件2采用LYP160低屈服点钢核心单元,并采用横向加劲肋约束;试件3采用LYP160低屈服点钢核心单元,并采用砂浆约束.试验结果表明,横向加劲肋可以为核心单元提供足够的侧向刚度,有效抑制核心单元的屈曲.采用LYP160低屈服点钢核心单元的BRB试件比采用普通Q235钢核心单元的BRB试件表现出更好的滞回性能和更强的耗能能力.

关 键 词：passive energy dissipation buckling-restrainedbrace low yield point steel 

分 类 号：TU352.1[建筑科学—结构工程]