吉林大学学报(工学版) ›› 2021, Vol. 51 ›› Issue (5): 1724-1733.doi: 10.13229/j.cnki.jdxbgxb20200491
• 交通运输工程·土木工程 • 上一篇
刁延松1,2(),郭荡1,屠康1,焦圣伦1,刘芸1,2,刘秀丽1,2
Yan-song DIAO1,2(),Dang GUO1,Kang TU1,Sheng-lun JIAO1,Yun LIU1,2,Xiu-li LIU1,2
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。
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