摘要
为解决较大跨度自复位钢框架结构层间位移角可能超限或耗能不足的关键问题,课题组前期提出将中间柱型阻尼器应用于装配式自复位钢框架。但是因门窗开洞等要求而不能在跨中处设置中间柱型阻尼器,从而提出了带双中间柱摩擦阻尼器的装配式自复位钢框架,对其进行了拟动力试验,并与带单中间柱摩擦阻尼器的装配式自复位钢框架的拟动力试验进行了对比,分析了其位移响应、滞回性能、中间柱摩擦阻尼器滑动、索力及典型部位应变变化等。结果表明,两榀框架震后短梁-长梁连接界面处残余转角和索力降低均较小,具有良好的开口闭合机制,耗能能力较优,能够有效避免主体结构的损伤,且带双中间柱摩擦阻尼器的装配式自复位钢框架控制结构侧移效果更好,耗能性能更优,适用于较大跨度的多高层结构。
In order to solve the crucial problems that the self-centering steel frame structure with relatively large span may exceed the inter-story drift limit and lack energy dissipation capacity,the intermediate column containing friction dampers was applied to the prefabricated self-centering steel frame by the research group.In view of the impossible application of intermediate column containing friction dampers in the middle span due to the requirements of opening doors and windows,a prefabricated self-centering steel frame with double intermediate columns containing friction dampers(PSCW-DCD)was proposed,and the pseudo-dynamic test was conducted.The results were then compared with the self-centering steel frame with single intermediate column containing friction dampers(PSCW-SCD).The displacement response,hysteretic behavior,damper slippage,cable force and strain variation of typical parts were analyzed.The test results indicate that both steel frames present relatively small residual rotation angle for short beam-long beam connection and loss of posttensioning(PT)force for steel strands,and the gap opening and closing mechanism is reliable.The specimens exhibit favorable energy dissipation capabilities and can effectively avoid the damage of main structure.Moreover,PSCW-DCD is proved to possess better lateral deformation-controlling effect and better energy dissipation performance,which are suitable for multi-rise and high-rise steel structures with larger span.
作者
张爱林
上官广浩
张艳霞
王庆博
李振兴
ZHANG Ailin;SHANGGUAN Guanghao;ZHANG Yanxia;WANG Qingbo;LI Zhenxing(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Engineering Research Center of High-rise and Large-span Prestressed Steel Structure,Beijing University of Technology,Beijing 100124,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2021年第10期14-24,共11页
Journal of Building Structures
基金
国家自然资金面上项目(51878025)
长江学者和创新团队发展计划(IRT17R06)。
关键词
自复位钢框架
中间柱摩擦阻尼器
拟动力试验
摩擦耗能
抗震性能
self-centering steel frame
intermediate column containing friction damper
pseudo-dynamic test
frictional energy dissipation
seismic performance
