(合肥工业大学土木与水利工程学院， 合肥 230009)

［摘要］对节点区附近的钢管柱壁进行加厚，设计了一种无横向加劲肋的节点域柱壁加强型方钢管柱-H型钢梁节点。通过5个节点试件的低周反复加载试验，研究了轴压比、节点区柱宽厚比和有无竖向加劲肋对节点试件抗震性能的影响。结果表明：各试件的滞回曲线形状较为饱满，刚度退化较为平缓，位移延性系数在3.0~4.1之间，等效黏滞阻尼系数在0.27~0.31之间，节点具有较好的塑性变形能力和抗震性能。随着轴压比的增大，节点的承载能力、延性和耗能能力均有所减小；随着节点区柱宽厚比的减小，节点的承载能力、延性和耗能能力均有所提高；节点区柱内设置竖向加劲肋，节点的承载能力显著提高，但延性和耗能能力相对较低。 

［关键词］节点域柱壁加强；梁柱节点；低周反复加载；抗震性能 

中图分类号：TU391 文献标识码：A文章编号：1002-0848X(2021)18-0009-08

Experimental study on seismic performance of H-shaped steel beam joint to square tubular column connection by joint field column wall reinforcement 

CHEN  Lihua,  CHEN  Kun,  XIA  Dengrong,  CHEN  Qi 

(College of Civil Engineering，Hefei University of Technology, Hefei 230009， China) 

Abstract: By thickening the square tubular column near the joint field, a type of H-shaped steel beam joint to square tubular column connection by joint field column wall reinforcement without transverse stiffener was designed. Through the low-cycle repeated loading test of 5 joint specimens, the effect of axial compression ratio, width-thickness ratio of the joint area column and the existence of vertical stiffeners on seismic performance were studied. The results show that the hysteretic curves of specimens are relatively plump, the stiffness degradation are relatively gentle, the displacement ductility coefficient is between 3.0 and 4.1, and the equivalent viscous damping coefficient is between 0.27 and 0.31, which has good plastic deformation ability and seismic performance. The bearing capacity, ductility and energy dissipation capacity of the joints decrease by increasing of the axial compression ratio. With the decrease of the width-thickness ratio of the joint area column, the bearing capacity, ductility and energy dissipation capacity of the joints improve. The bearing capacity of the joint is significantly improved by installing vertical stiffeners in the column of the joint area, but the ductility and energy dissipation capacity are relatively low.  

Keywords:joint field column wall reinforcement； beam-column joint； low-cycle repeated loading； seismic performance

*国家自然科学基金（51778202）。

 作者简介：陈丽华，博士，教授，Email:hfclh1972@hfut.edu.com。