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(清华大学土木工程系，北京 100084)

［摘要］在总结现有防屈曲支撑的截面形式、构成特点以及设计理论的基础上，提出了一种新型的防屈曲耗能支撑，即型钢组合装配式防屈曲支撑。介绍了这种新型防屈曲支撑的截面形式以及连接构造，并对其基本性能和设计方法进行了研究，提出了有效约束比的确定方法、外围约束构件螺栓强度验算方法和间距控制原则、内核与外围之间空隙的控制要求。

［关键词］型钢组合装配式防屈曲支撑；弹性屈曲荷载；内核构件；外围约束构件；有效约束比

Behavior and application of buckling-restrained braces assembled with section steels

Guo Yanlin, Jiang Leixin(Department of Civil Engineering, Tsinghua University, Beijing 100084, China)

Abstract:A new type of buckling-restrained braces is put forward, named as the buckling-restrained braces assembled with section steels, in which the section steels are used to assemble the restraining subassembly. The different section types and joint types of buckling-restrained braces are outlined and corresponding design methods are obtained with the help of the primary theory derived and FEA results obtained, including the prediction of effective restraint ratio, the strength verification of bolts and controlling distance between bolts, as well as the controlling gap between core subassembly and restraining subassembly.

Keywords:buckling-restrained braces assembled with section steels; elastic buckling load; core subassembly; restraining subassembly; effective restraint ratio

*教育部博士点基金资助项目(20060003045)。

作者简介：郭彦林，博士，教授，博士生导师，Email:gyl@tsinghua.edu.cn。

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