摘要
异形钢管混凝土柱-钢梁节点通常采用内隔板或外隔板,针对外隔板的存在会影响建筑的使用功能、内隔板加工不便且会影响混凝土的浇筑质量的不足,提出了节点区管壁局部加厚带Z字形悬臂梁段的新型节点。首先,取消外隔板,代之以节点区管壁局部加厚;然后,将钢梁与异形钢管混凝土柱通过Z字形悬臂梁段进行连接。按照“强柱弱梁”原则设计制作了6个缩尺比例为1∶2的异形钢管混凝土柱-钢梁节点试件,新型节点和外隔板式节点试件各3个,柱截面分别为L、T、十字形。对上述节点试件分别进行了低周往复荷载作用下的试验研究,得到了其破坏模式和滞回曲线、骨架曲线、强度退化曲线、刚度退化曲线、延性因数、总耗能以及等效黏滞阻尼系数等抗震性能指标。结果表明:与外隔板式节点相比,新型节点具有较高的承载力、较好的延性和耗能能力。新型节点的耗能包含材料屈服耗能和Z字形悬臂梁与钢梁拼接区板件间的滑移耗能两部分,滑移段的出现显著提高了节点的延性。
Joint between concrete filled special-shaped steel tube column and steel beams usually adopts inner diaphragm or outer diaphragm.However,the outer diaphragm will hamper the function of the architecture,and it is inconvenient to process the inner diaphragm,which will also obstruct the pouring quality of concrete.Therefore,a new joint combined by local thickening the tube walls in the joint zone and using a Z-shaped cantilever-beam splicing segment is presented in this paper.The concrete modifications are:(1)the outer diaphragms were replaced by local thickening the tube walls in the joint zone,(2)the Z-shaped cantilever-beam is employed to connect the concrete filled special-shaped steel tube column and steel beam.According to the strong column weak beam principle,6 one half scaled specimens of the joint between concrete filled special-shaped steel tube column and steel beam were designed and manufactured,the number of the new joint and the joint with outer diaphragm are all 3,the column sections are L shape,T shape and十shape,respectively.The low-reversed loading tests for the aforesaid 6 specimens were carried out,their failure modes and the seismic behavior,such as hysteresis curve,skeleton curve,strength degradation curves,stiffness degradation curve,ductility coefficient,total energy dissipation and equivalent viscous damping ratio,were obtained.The results showed that the new joints had the relatively high bearing capacity,better ductility and energy dissipation capacity in comparison with the joint with outer diaphragm.The energy dissipation of the new joints included the contribution of the material yielding and the contribution of the slipping between the plates in the splicing area of the Z-shaped cantilever-beam and the steel beam,and the ductility of the joint was significantly improved by the slipping.
作者
刁延松
郭荡
屠康
焦圣伦
刘芸
刘秀丽
DIAO Yan-song;GUO Dang;TU Kang;JIAO Sheng-lun;LIU Yun;LIU Xiu-li(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China;Collaborative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone,Qingdao University of Technology,Qingdao 266033,China)
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2021年第5期1724-1733,共10页
Journal of Jilin University:Engineering and Technology Edition
基金
山东省重点研发计划(公益类专项)项目(2019GHY112039).
关键词
异形钢管混凝土柱-钢梁节点
管壁局部加厚
Z字形悬臂梁段
抗震性能
joints between concrete filled special-shaped steel tube column and steel beams
local thickening the tube wall
Z-shaped cantilever-beam splicing
seismic behavior
