东南大学学报（英文版）2021，Vol.37Issue(3)：290-298,9.DOI:10.3969/j.issn.1003-7985.2021.03.009
钢结构新型节点抗震性能分析
Analysis on seismic performance of a new type of joint in steel structures
摘要
Abstract
To examine the seismic performance of a newly fabricated weakened joint at the beam end position,four groups of energy-consuming steel plates with different weakening depths and thicknesses were subjected to horizontal cyclic reciprocating loading tests on beam ends.The tests were designed to evaluate the beams' hysteresis curve,skeleton curve,bearing capacity degradation curve,stiffness degradation curve,and ductility and the nodes' energy dissipation capacity.The test results show that a newly fabricated joint will not undergo brittle damage when the beam-column joint is welded at a displacement of 105 mm.Thus,the hysteresis curve will show an inverse S shape,and an obvious slip phenomenon will occur,which is mainly due to splicing.The diameter of the bolt connecting the slab to the beam flange is slightly smaller than the aperture.Due to the existence of slippage,the skeleton curve has no evident yield point.The joint ductility coefficient is less than 3.0,and the initial rotational stiffness of the joint is also small.The buckling of the splicing panel causes a rapid decrease in the joint bearing capacity.The main approaches,appropriately reducing the weakening depth and increasing the thickness of the splicing plate,can delay the occurrence of buckling and improve the ductility of the joint.关键词
钢结构/耗能构件/削弱型节点/抗震性能/循环加载试验Key words
steel structure/energy-dissipating members/weakened joint/seismic performance/cyclic loading tests分类
建筑与水利引用本文复制引用
李晓东,马广田,闫胤积..钢结构新型节点抗震性能分析[J].东南大学学报（英文版）,2021,37(3):290-298,9.基金项目
The National Natural Science Foundation of China(No.51968043,51978320). （No.51968043,51978320）
