双矩形管约束屈曲支撑的有限元研究  

FINITE ELEMENT ANALYSIS OF A BUCKLING-RESTRAINED BRACE CONSISTING OF TWO RECTANGULAR STEEL TUBES

作　　者：舒可 陈驹[1] SHU Ke;CHEN Ju(School of Architectural Engi.,Zhejiang Univ.,Hangzhou 310058,China)

机构地区：[1]浙江大学建筑工程学院,杭州310058

出　　处：《低温建筑技术》2018年第6期42-44,54,共4页Low Temperature Architecture Technology

摘　　要：本文提出一种新型全钢约束屈曲支撑。该支撑采用Q235钢加工,内芯为端部内侧焊接加劲肋的矩形钢管,外围约束为普通矩形钢管。通过对多个初始缺陷、内芯与外围约束之间间隙不同的支撑进行单轴受压加载的数值模拟,发现该支撑能作为承载型约束屈曲支撑应用于实际工程。同时数值模拟结果表明,整体初始缺陷和间隙越小,约束屈曲支撑的承载能力越强。In this paper,a new type buckling-restrained brace(BRB)was proposed.This BRB was made of Q235 steel.The inner core is a rectangular steel tube with stiffening ribs on the inner side of the end.The external constraint part of this BRB is a common rectangular steel tube.Specimens with different initial imperfection and clearance were designed for finite element analysis.Then we found that this BRB can be applied to practical project.And the smaller the initial imperfection and the gap,the stronger the bearing capacity of the restrained buckling support.

关 键 词：内置加劲肋 约束屈曲支撑 承载能力 初始缺陷 间隙 

分 类 号：TU323.2[建筑科学—结构工程]