装配式冷弯厚壁型钢半刚性梁-柱节点抗震性能试验研究  

Experimental Study on Seismic Performance of Prefabricated Cold-formed Thick-walled Steel Semi-rigid Beam-column Joints

作　　者：李占鸿[1,2] 李元齐 白雪[2] 伍福炜 马福栋 LI Zhanhong;LI Yuanqi;BAI Xue;WU Fuwei;MA Fudong(College of Civil Engineering,Tongji University,Shanghai 200092,China;Shanghai Key Laboratory of Engineering Structure Safety,Shanghai Research Institute of Building Sciences Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]上海市建筑科学研究院有限公司上海市工程结构安全重点实验室,上海200032

出　　处：《结构工程师》2024年第3期95-106,共12页Structural Engineers

基　　金：国家自然科学基金重点项目(51538002)。

摘　　要：冷弯型钢在装配式结构中应用具有天然的优势,为了扩展冷弯厚壁型钢结构的使用范围,克服冷弯厚壁钢的缺点,设计6个新型分层装配式“十字型”梁-柱节点,进行循环加载试验,对梁-柱节点的破坏模式、初始刚度、骨架曲线、等效黏滞阻尼系数、能量耗散系数、割线刚度、滞回曲线和关键部位应变分布进行研究,主要得到以下结论:通过螺栓和节点板的滑移,半刚性节点具有一定的耗能能力。增设高强螺栓可以提高梁柱节点的承载力,初始刚度和耗能能力也得到提高,避免梁端与连接板孔壁承压。增加可更换节点翼缘板,对梁-柱节点的破坏模式没有明显影响,承载能力、耗能能力、初始刚度分别得到较大提高。The application of cold-formed steel in prefabricated structures has inherent advantages.In order to expand the range of use of cold-formed thick-walled steel structures and avoid its shortcomings,this paper designed six new layered assembled“cross-shaped”beam-column joints and conducted cyclic loading tests to investigate the failure mode,initial stiffness,skeleton curve,equivalent viscous damping coefficient,energy dissipation coefficient,secant stiffness,hysteresis curve and strain distribution in key parts of the beamcolumn joints.The main conclusions were drawn as follows:Through the sliding of bolts and node plates,semirigid nodes have a certain energy dissipation capacity.Adding high-strength bolts can improve the bearing capacity initial stiffness and energy dissipation capacity of beam column joints as well as avoid bearing pressure on the bolt hole between the beam end and the connecting plate.Adding replaceable node flange plates has no significant impact on the failure mode of beam column joints,but significantly improves their bearing capacity,energy dissipation capacity,and initial stiffness.

关 键 词：冷弯厚壁型钢 梁-柱节点 半刚性 初始刚度 耗能能力 

分 类 号：TU352.11[建筑科学—结构工程] TU398.9