摘要
通过对比分析了PEC柱弱轴方向型钢梁端板和顶底角钢连接节点抗震性能,旨在选择出较优性能的弱轴方向连接节点,并为实践提供试验依据和分析.试验以节点区板件厚度为主要研究因素设计制作了5个不同构造的节点试件,并对其进行了低周反复的水平荷载试验.分析了各试件的破坏形态,极限荷载,滞回曲线,骨架曲线,延性及刚度和承载力退化等.结果表明:端板节点和顶底角钢节点的破坏模式均为延性破坏,二者均表现出良好的滞回性能、延性、和耗能能力;与端板节点相比,顶底角钢节点滞回曲线更饱满,耗能更优,刚度退化稳定,位移延性系数最大值达到6. 3,大于端板节点的4. 5,但承载力低于端板节点.
In order to select the weak axis connecting nodes with better performance and to provide the experimental basis and analysis for practice,the seismic performance of PEC column(weak axis)-steel beam joint with end plates was compared with that of the top-seat angle nodes.Five connections were designed,on which the low frequency cyclic horizontal loading test was carried out.The failure mode,ultimate load,hysteretic curve,skeleton curve,ductility,stiffness and bearing capacity degradation of each specimen were analyzed.The result was summarized as follows:the above-mentioned two node failure modes are ductile damage,and both have good hysteretic property,good ductility,good plastic deformaction ability,and good energy dissipating capacity.Compared with the end-plate joints,the hysteresis curve of the top-seat angle nodes was fuller,its energy dissipating capacity is stronger,and its stiffness degradation is stable.The maximum displacement ductility coefficient of the top-seat angle nodes reaches 6.3,which is greater than 4.5 of the end plate node,but the bearing capacity is lower than that of the end-plate joints.
作者
赵根田
路瑶
ZHAO Gen-tian;LU Yao(Civil Engineering School,Inner Mongolia University of Science and Technology,Baotou 014010,China)
出处
《内蒙古科技大学学报》
CAS
2018年第4期392-398,共7页
Journal of Inner Mongolia University of Science and Technology
基金
国家自然科学基金资助项目(51268042)
关键词
PEC弱轴
端板
顶底角钢
抗震性能
PEC column(weak axis)
end plate connection
top-seat angle connection
seismic behavior
