防屈曲支撑的型式、设计理论与应用研究进展  

RESEARCH PROGRESS OF BUCKLING RESTRAINED BRACES: TYPES, DESIGN METHODS AND APPLICATIONS

作　　者：郭彦林[1] 童精中[1] 周鹏[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《工程力学》2016年第9期1-14,共14页Engineering Mechanics

基　　金：国家自然科学基金面上项目(51678340)

摘　　要：该文综述了防屈曲支撑构件自发明以来40年的发展历程,可以看出防屈曲支撑逐步向轻型化、高承载和复杂功能方向的发展趋势。特别介绍了新近发展的全钢装配式、梭形、内核分离式、多肢格构式及桁架(索桁架与刚性桁架)约束型防屈曲支撑的型式和组成、受力机理和破坏模式、弹性屈曲荷载、单调轴压下的承载力、反复拉压荷载作用下的滞回和低周疲劳性能、试验研究成果等,重点关注防屈曲支撑的外围约束刚度、约束比门槛值、外围连接强度以及端部构造等设计理论的研究成果。综述了国内外相关规范对防屈曲支撑设计的相关规定,介绍并讨论了基于约束比和基于正则化长细比的两种设计方法。This paper summarizes the development of buckling restrained braces（BRBs） for the last 40 years since they were invented. The development trend of BRB designs tends to make BRBs more lightweight, to have higher load-carrying capacity and complex functional capabilities. This paper particularly proposes a number of newly developed BRBs including all-steel assembled BRB, shuttle-shaped BRB, core-separated BRB, latticed BRB with multiple chords and truss-restraining（cable-truss and rigid-truss） BRB. The composition, structural mechanism, failure mode, elastic buckling load, load-carrying capacity under monotonic compressive load, hysteretic and low-cycle fatigue performance under cyclic load of each type of BRB are described respectively. In addition, the corresponding experimental results are obtained. The design theories of the external restraining stiffness, lower limit of restraining ratio, external connecting strength and constructional details of projections are of major concerns. The relevant design specifications in China and other countries are reviewed, and two design methods based on the restraining ratio and normalized slenderness ratio of BRBs are introduced.

关 键 词：防屈曲支撑 试验研究 设计理论 约束比 正则化长细比 

分 类 号：TU391[建筑科学—结构工程] TU352.1