摘要
在自复位屈曲约束支撑(SC-BRB)端部引入摩擦保护装置(FS)形成SC-BRB-FS,可以有效避免因结构变形过大导致的预拉杆断裂,以及由此引起的支撑承载力陡降和残余变形显著增大的问题。基于规范设计4层和8层SC-BRB支撑钢框架,并根据支撑的试验结果,分别建立能考虑预拉杆断裂的普通SC-BRB框架和采用摩擦保护装置的SC-BRB框架的分析模型。通过非线性动力时程分析深入研究引入摩擦保护装置对SC-BRB框架抗震性能的影响,结果表明:在SC-BRB端部设置摩擦保护装置不仅能降低结构的损伤程度和倒塌概率,还能减小结构的残余变形;增大摩擦保护装置的启动位移不会影响结构最大位移响应,但能进一步降低结构的残余变形。
Introducing the friction fuse(FS)at end of self-resetting buckling-restrained brace(SR-BRB)to form SR-BRB-FS can effectively avoid fracture of pretensioned rods caused by excessive structural deformation,and the problem of sharp drop of brace load-bearing capacity and significant increase in residual deformation.Here,based on the code,a 4-story and an 8-story SR-BRB braced steel frames were designed.According to the test results of braces,analysis models for the ordinary SR-BRB frame considering fracture of pretensioned rods and the SR-BRB frame with FS were established,respectively.Through nonlinear dynamic time history analysis,effects of FS on aseismic performance of SR-BRB frame were deeply studied.The results showed that setting FS at end of SR-BRB can not only reduce damage degree and collapse probability of the structure,but also reduce residual deformation of the structure;increase in starting displacement of FS can not affect the maximum displacement response of the structure,but further reduce residual deformation of the structure.
作者
段莉
谢钦
李霞
周臻
DUAN Li;XIE Qin;LI Xia;ZHOU Zhen(State Key Lab of Building Safety and Built Environment,Beijing 100013,China;School of Civil Engineering,Guizhou Institute of Technology,Guiyang 550003,China;National Engineering Research Center of Building Technology,Beijing 100013,China;MOE Key Lab of Concrete and Pre-stressed Concrete Structure,Southeast University,Nanjing 210096,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2022年第13期89-95,102,共8页
Journal of Vibration and Shock
基金
建筑安全与环境国家重点实验室暨国家建筑工程技术研究中心开放课题基金资助(BSBE2019-10)
国家自然科学基金(52108449)
中国博士后科学基金第69批面上资助(2021M690621)
贵州省科技计划项目([2020]1Y249)
贵州理工学院学术新苗培养及创新探索项目(GZLGXM-10)。
关键词
自复位
摩擦保护装置
支撑框架
抗震性能
self-resetting(SR)
friction fuse(FS)
braced frame
aseismic performance
