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(1 南京市民用建筑設(shè)計(jì)研究院，南京 210002； 2 東南大學(xué)土木工程學(xué)院，南京 210096)
［摘要］通過OpenSees對(duì)兩個(gè)屈曲約束支撐框架結(jié)構(gòu)算例進(jìn)行分析，說明了無害位移在屈曲約束支撐框架結(jié)構(gòu)層間位移中所占的比重較小，上下兩層水平位移差代替層間受力位移已具有足夠的精度，能夠滿足工程要求。根據(jù)“小震不壞、中震可修、大震不倒”的設(shè)防目標(biāo)，結(jié)合屈曲約束支撐的耗能性能、變形能力和保護(hù)主體結(jié)構(gòu)的作用，提出了屈曲約束支撐框架的層間位移角限值。
［關(guān)鍵詞］屈曲約束支撐；層間位移角限值；層間位移；無害位移
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
作者簡介：袁鈺，碩士，助理工程師，Email：yuanyu2005jj@sohu.com。
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