某加屈曲约束支撑框架结构的弹塑性时程分析  

Elastoplastic Time-history Analysis of a Frame Structure Supported by Buckling Restrained Brace

作　　者：熊焕君 XIONG Huan-jun(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070

出　　处：《建材世界》2019年第2期39-42,共4页The World of Building Materials

摘　　要：某具有4项超限的大跨混凝土框架结构扭转效应明显,没有加防屈曲约束支撑(BRB)时,结构扭转周期比大于限值0.90(第一扭转周期/第一平动周期),最大扭转位移比大于限值1.4。不符合规范要求,故需要在结构中加入防屈曲约束支撑限值扭转。为验证加防屈曲约束撑后结构的的可靠性,对结构进行弹塑性时程分析,得出结构层间位移角及支撑屈服情况。结果表明结构在加入屈曲约束支撑后是可靠地,屈曲约束支撑不仅控制了结构的扭转,而且在大震下充分耗能,保证了结构的安全性。The torsional effect of a long-span concrete frame structure with 4 overlimits was obvious.When buckling restrained brace(BRB) was not added,the torsional period ratio was greater than the limit value of 0.90 (the first torsional period/the first translational period),and the maximum torsional displacement ratio was greater than the limit value of 1.4.As it did not meet the requirements of the code,the buckling restrained brace should be added into the structure.In order to verify the reliability of the structure with buckling restrained brace,the elastic-plastic time history analysis was carried out to obtain the displacement angle between the layers and the yield of the support.The results showed that the structure was reliable after the buckling restrained brace was added.The buckling restrained brace not only controlled the torsion of the structure,but also fully dissipated the energy under the large earthquake,ensuring the safety of the structure.

关 键 词：扭转不规则 防屈曲约束支撑 弹塑性时程分析 

分 类 号：TU352.11[建筑科学—结构工程]