双钢管约束屈曲支撑的有限元分析  

A Finite Element Analysis of Double-tube Buckling Restrained Brace

作　　者：殷占忠[1] 王秀丽[1] 李晓东[1] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《甘肃科学学报》2010年第1期109-113,共5页Journal of Gansu Sciences

基　　金：国家自然科学基金(50678078);兰州理工大学土木工程学院建工七七基金

摘　　要：双钢管约束屈曲支撑由外套管和内核管组成.在外套管的约束作用下支撑在受拉和受压时性能基本相同,弱震作用下就可能提早屈服耗能,保护主体结构不受破坏,强震作用大量吸收能量,提高结构安全度.基于有限元理论,建立双钢管约束屈曲支撑的有限元模型,对该支撑进行详细地计算与分析,全面掌握构件的强度和耗能特性,为约束屈曲支撑在结构中的应用提供了参考意见.The double-tube buckling restrained brace consists of an inner tube and an outer tube. Under the restriction of the outer tube brace it shows the same load-deformation behavior in both compression and tension. BRBs can absorb higher energy under weak or strong earthquake actions, so the degree of the safety of the structure is enhanced. Based on the theory of the finite element method, the finite element entity model of double-tube buckling restrained brace is built with a contact ring. The brace is systematically analyzed and computed. Then the strength and the dissipative characteristics of the member are also obtained. Some advices of applied BRBs are presented.

关 键 词：约束屈曲支撑 耗能能力 有限元分析 

分 类 号：TU394[建筑科学—结构工程]