丁婷¹，  黄镇¹，  李爱群¹，  刘康安²
    （1 东南大学土木工程学院，南京 210096；2 南京丹普科技工程有限公司，南京 211000）

[摘要] 为保证防屈曲支撑工作性能的稳定性，提出一种新型外围约束机制。通过有限元分析，同时考虑初始缺陷的影响和接触非线性，对防屈曲支撑进行数值模拟，分析其在两种不同形式的加劲布置方式下支撑的力学性能。分析表明，不同的屈曲约束形式对核心构件侧向变形的约束效果不同，从而影响轴向位移的加载幅值和支撑的承载力。基于上述分析，给出防屈曲支撑的外围约束单元的设计建议。
[关键词] 防屈曲支撑；接触；侧向位移；滞回曲线
中图分类号：TU323.2    文献标识码：A  文章编号：1002-848X(2011) Sl-0174-04

Firute element analysis of innovative stiffeners buckling-restrained braces
    Ding Ting¹,  Huang Zhen¹,  Li Aiqun¹,  Liu Kang' an²
    (1 College of Civil Engineering, Southeast University, Nanjing 210096, China; 2 Nanjing DAMP Science and Technology Engineering Co., Ltd.,Nanjing 211000, China)

Abstract: In order to ensure the holistic stability of buckling-restrained braces, it puts forward a kind of innovative periphery restriction mechanism, which enhances its lateral stiffness by setting stiffening on the wall of restriction. Considering the effect of initial limitation and contact nonlinear analysis, with finite element procedure, the buckling-restrained braces were simulated and the mechanical performance of braces under two different collocational quomodo of stiffening was analyzed. By the analysis, different restriction has different restriction degree to lateral displacement of kemel. It can affect the axile displacement and carrying capacity of braces. At last, some design advices to this
innovative stiffening of buckling-restrained braces were proposed.
Keywords: buckling-restrained braces; contact; lateral displacement; hysteretic curve