防屈曲支撑的力学性能研究  

The mechanics properties study on cutting buckling-restrained brace

作　　者：王永贵[1] 高向宇[2] 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000 [2]北京工业大学建筑工程学院,北京100023

出　　处：《河南理工大学学报（自然科学版）》2011年第6期704-708,共5页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(50678013)

摘　　要：为检验防屈曲支撑的构造和抗震性能,对所设计的两个T型截面防屈曲支撑试件进行了低周反复加载静力试验,研究了包括力-位移滞回曲线、力-应变曲线、最大轴向拉压力变化等在内的力学性能.试验表明:试件荷载-位移滞回曲线稳定、饱满、对称,塑性性能良好;试件的力学性能在拉、压状态下基本保持对称性;钢材品种、截面形式对防屈曲支撑的力学性能几乎没有影响.研究表明,防屈曲支撑构造合理,不会发生受压屈曲失稳,具有一定的刚度,同时又具有良好的耗能性能和抗疲劳性能,是一种新型的耗能支撑.To detect the seismic performance and conformation of buckling-restrained brace（BRB）,two pieces of specimen are designed and tested.Cyclically loading tests are conducted,as well as force-deformation loops,force-strain loops and the maximum tensile stress.The test showed that the force-displacement relationship of the specimen is stable,full,symmetrical;The equivalent stiffness with deformation of the specimen is symmetrical in the state of tension and compression;The varieties of steel,section of the form,nature of the force have no impact to the rule of stiffness degradation and equivalent damping ratio.The study expresses the conformation of the BRB made of two hot-rolled angle steel is in reason.This BRB not only has stated stiffness,and it also has good energy dissipation ability as well as seismic ductility.It is a new type of energy dissipation brace.

关 键 词：防屈曲支撑 应力 角钢 抗震性能 

分 类 号：TU352[建筑科学—结构工程]