（1 昆明理工大学建筑工程学院， 昆明 650500； 2 昆明理工大学公共安全与应急管理学院， 昆明 650093；3 陕西省建筑科学研究院有限公司， 西安 710082）

［摘要］提出了一种采用螺栓连接的新型法兰盘外环板式钢节点，设计制作了3个不同构造形式的试件并对其进行了低周往复加载试验研究。结果表明：在梁柱节点域设置顶底角钢连接件可增强节点域刚度，提高节点的耗能能力、延性性能、承载力和初始刚度，并减缓节点的刚度退化，但同时也会导致节点连接处加强环板先于柱发生破坏；对于未设置顶底角钢的三段式柱节点试件，其破坏符合“强柱弱梁、强节点弱构件”的破坏模式，但该试件的承载力和耗能能力较弱；采用贯通式柱的试件节点域整体性较好，承载力和初始刚度较大，但承载力下降率和刚度退化率亦较大，且节点延性性能较差，同时外加强环板更易发生破坏。

［关键词］钢结构； 外加强环板； 试验研究

中图分类号：TU391文献标识码：A文章编号：1002-848X(2019)11-0082-05

Experimental study on seismic performance of a new type of flanged outer ring plate steel joint

Zuo Heng1， Tao Zhong2， Liu Bei3

(1 Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China；2 Department of Public Safety and Emergency Management, Kunming University of Science and Technology, Kunming 650093, China； 3 Shaanxi Academy of Building Research, Xi′an 710082, China)

Abstract:A new type of flanged outer ring plate steel joint with bolted connections was proposed. Three specimens with different structural forms were designed and manufactured, and the low cycle reciprocating loading test was carried out. The results show that setting top and bottom angle steel connectors in beam-column joint area can enhance the stiffness of joint area, improve the energy dissipation capacity, ductility performance, bearing capacity and initial stiffness of joint, and slow down the stiffness degradation rate of joint, but it will also lead to the failure of strengthening ring plate at joint area prior to column at the same time; for the three-section column joint specimens without top and bottom angle steel, its failure conforms to failure mode of “strong column, weak beam, strong joint and weak member”, but the bearing capacity and energy dissipation capacity of the specimen is weak; the specimen with penetrated column has better integrity, larger bearing capacity and initial stiffness, but the reduction rate of bearing capacity and stiffness is also large, and the ductility of the joint is poor, while the outer reinforced ring plate is more vulnerable to failure.

Keywords:steel structure; outer reinforced ring plate; experimental study