时强1,2,晏石林1,王新武2,李春霞1.装配式偏心支撑钢框架拟静力试验研究[J].湖南大学学报:自然科学版,2020,(9):48~56
装配式偏心支撑钢框架拟静力试验研究
Experimental Investigation on Pseudo-static Test of Prefabricated Eccentrically Braced Steel Frame
  
DOI:
中文关键词:  装配式  偏心支撑  半刚性  抗震性能  拟静力试验
英文关键词:prefabricated  eccentrically braced frame  semi-rigid  seismic performance  pseudo-static test
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作者单位
时强1,2,晏石林1,王新武2,李春霞1 (1. 武汉理工大学 新材料力学理论与应用湖北省重点实验室湖北 武汉430070 2. 洛阳理工学院 河南省新型土木工程结构国际联合实验室河南 洛阳471023) 
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中文摘要:
      为研究端板厚度和连接方式对装配式偏心支撑钢框架抗震性能的影响,进行了2个不同端板厚度的偏心支撑半刚接钢框架和1个焊接连接的偏心支撑刚接钢框架的拟静力试验.结合试验研究结果,对装配式偏心支撑钢框架试件的破坏形态、荷载-位移滞回曲线、骨架曲线、侧移延性系数、等效粘滞阻尼系数进行了深入分析.试验结果表明:螺栓端板连接偏心支撑钢框架抗震性能良好.端板厚度对装配式偏心支撑钢框架耗能能力具有一定影响,端板厚度由16 mm增加到24 mm,由于破坏延迟,耗能梁段极限剪切承载力提高43.32%. 同时,受高强螺栓-端板连接滑移的影响,偏心支撑半刚接钢框架滞回曲线呈“弓形”,表现出一定的“捏缩”现象.
英文摘要:
      In order to study the influence of end plate thickness and node types on seismic behavior of prefabricated eccentrically braced steel frame,pseudo-static tests of two eccentrically braced semi-rigid steel frames with different end plate thickness and one eccentrically supported rigid steel frame were carried out. Based on the testing results, the main characteristics of the failure modes,load-deformation hysteresis curves, skeleton curves, lateral ductility coefficients and equivalent viscous damping coefficients of the specimens are analyzed and discussed. The results show that the prefabricated eccentrically braced steel frame with end plate connections has good seismic performance. The thickness of the end plate is an important factor affecting the energy dissipation capacity of the prefabricated eccentrically braced steel frame, and the energy dissipation capacity of the structure increases by 43.32% with the thickness of the end plate increasing from 16 mm to 24 mm. At the same time, affected by the slip of high-strength bolt-end plate connection, the hysteresis curve of semi-rigid steel frame with eccentric support is“bow”,showing a phenomenon of “pinching”.
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