(1 南京市民用建筑设计研究院，南京 210002； 2 东南大学土木工程学院，南京 210096)
［摘要］通过OpenSees对两个屈曲约束支撑框架结构算例进行分析，说明了无害位移在屈曲约束支撑框架结构层间位移中所占的比重较小，上下两层水平位移差代替层间受力位移已具有足够的精度，能够满足工程要求。根据“小震不坏、中震可修、大震不倒”的设防目标，结合屈曲约束支撑的耗能性能、变形能力和保护主体结构的作用，提出了屈曲约束支撑框架的层间位移角限值。
［关键词］屈曲约束支撑；层间位移角限值；层间位移；无害位移
Research on the story drift and allowable value index of buckling restrained braced frame structure
Yuan Yu1, Wu Jing2(1 Nanjing Municipal Institute of Civil Architecture, Nanjing 210002, China; 2 College of Civil Engineering, Southeast University, Nanjing 210096, China)
Abstract:By numerical examples using OpenSees software, it is proved that the harmless drift is so small that can be ignored for buckling restrained braced frame (BRBF). It is of exactitude to take the difference of displacements of two neighboring stories as the story drift. In order to meet the requirements of no-damage under light earthquake, repairable under medium earthquake, and no-collapse under strong earthquake, the allowable story drift index of BRBF is suggested based on excellent hysteretic properties and ductility.
Keywords:buckling restrained braces; allowable story drift index; story drift; harmless drift
作者简介：袁钰，硕士，助理工程师，Email：yuanyu2005jj@sohu.com。
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