自复位三重钢管约束屈曲支撑性能分析  

Analysis on buckling-restrained brace performance of self-centering triple-steel tube

作　　者：喻圣洁 郑廷银[2] YU Shengjie ZHENG Tingyin(School of Architectural Technology,Jiangsu Vocational Institute of Architectural Technology,Xuzhou,Jiangsu 221116, China College of Civil Engineering, Nanjing Tech University, Nanjing,Jiangsu 211816 ,China)

机构地区：[1]江苏建筑职业技术学院建筑工程技术学院,江苏徐州221116 [2]南京工业大学土木工程学院,江苏南京211816

出　　处：《江苏建筑职业技术学院学报》2016年第4期20-22,31,共4页Journal Of Jiangsu Vocational Institute of Architectural Technology

基　　金：江苏建筑职业技术学院重点项目:空间钢结构屋面风灾预防与防治研究(JYA14-06)

摘　　要：针对普通约束屈曲支撑(BRB)残余变形大的缺点,提出一种新型支撑——自复位三重钢管约束屈曲支撑(SCBRB),给出其具体组成构造.为研究其力学性能,通过整体分析研究其并联工作特点及SC系统的运动机理,并对比分析一字型芯材BRB与圆管芯材BRB工作原理的区别.结果表明:自复位三重钢管约束屈曲支撑力学性能最优,其恢复力模型呈旗形,当复位筋预拉力大于耗能芯材屈服力时,支撑可实现自复位功能.According to big residual deformation of normal buckling-restrained brace, a new brace called self-centering triple-steel tube buckling-restrained brace （SCBRB） is put forward to control residual deformation and its specific constitution is given. To study its mechanical proper- ties, we study the hunt-wound working principle of SCBRB through overall analysis, analyzes the working mechanism of self-centering system （SC）, and compare the working principles between BRB with I-shaped core and BRB with tubular core. The results show that self-centering triple-steel tube buckling-restrained brace has a better performance, the restoring force model of SCBRB has a shape of flag, SCBRB achieves self-centering function when pretension force of recentering bar is bigger than the yield force of energy dissipation core.

关 键 词：自复位 约束屈曲支撑 力学性能 一字芯材 圆管芯材 恢复力模型 

分 类 号：TU352.1[建筑科学—结构工程]