(1 河北工业大学土木与交通学院,天津 300401； 2 河北省土木工程技术研究中心,天津 300401；3 中土大地国际建筑设计有限公司,石家庄 050035)

摘要: 为了解决钢结构中钢梁下翼缘焊缝根部易发生脆性断裂的问题，提出一种兼有外环板和贯通隔板的新型栓焊混合装配方钢管混凝土柱-H 钢梁连接节点。采用有限元 ABAQUS 对其进行数值模拟，研究该节点的传力机理、屈服机制、破坏模态和耗能性能。通过有限元参数分析，深入研究轴压比、宽厚比以及外环板厚度对节点抗震性能的影响。结果表明:节点呈现典型弯曲破坏模式，塑性铰发生在梁上翼缘与外环板连接处，节点屈服始于翼缘塑性铰区，经由翼缘扩展至腹板，继而钢管混凝土柱屈曲，最终上翼缘焊缝断裂破坏，且节点表现出良好的转动性能；增大钢管宽厚比和外环板厚度均可提高节点承载力，建议钢管宽厚比取值为 35 ~ 45，钢梁翼缘与外环板厚度及钢材强度一致。

关键词: 上环下贯装配式节点； 下栓上焊混合连接； 抗震性能； 屈服机制

中图分类号:TU391 文献标志码:A 文章编号:1002-848X(2022)19-0118-06

DOI:10.19701 / j.jzjg.LS220162

Numerical simulation on seismic performance of concrete-filled square steel tubecolumn-H-steel beam bolt-welded hybrid joints with upper annular plate andlower through-diaphragm connection

SHI Xiaona1,RONG Xian1，2,HAO Guiqiang3,ZHANG Jianxin1，2

(1 School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China；2 Civil Engineering Technology Research Center of Hebei Province,Tianjin 300401,China； 3 Zhongtu InternationalArchitectural Design Co. ,Ltd. ,Shijiazhuang 050035,China)

Abstract: To solve brittle fracture at the welding root of the lower steel beam flange in steel structure,a new type ofconcrete-filled square steel tube column-H-steel beam bolt-welded hybrid joints with upper annular plate and lowerthrough-diaphragm connection was proposed. Finite element ABAQUS was used for numerical simulation to study the forcetransfer mechanism,yield mechanism,failure mode and energy dissipation performance of this joint. The effects of axialcompression ratio,width to thickness ratio and thickness of outer annular plate on the seismic performance of joints wereanalyzed by finite element parameter analysis. The results show that the joints exhibited a typical bending failure mode. Theplastic hinge occurred between the upper flange and the outer annular plate. The joint yielded at the plastic hinge area ofthe flange extending to the web through the flange,the concrete-filled square steel tube column buckled,and the weldingfractured at the upper flange. The joints shows good rotational performance. The bearing capacity could be improved byincreasing the width to thickness ratio of steel tube column and thickness of outer annular plate. It is suggested that thewidth to thickness ratio of steel tube column should be 35~ 45,and the steel beam flange has the same thickness and steelstrength with outer annular plate.

Keywords:upper annular plate and lower through-diaphragm precast joint； bottom bolted top welded hybrid connection；seismic performance； yield mechanism

∗河北省自然科学基金(E2017202278)，天津市自然科学基金(20JCZDJC00370)。

第一作者:石晓娜，博士研究生，正高级工程师，主要从事防灾减灾、结构抗震方向的研究与工程实践工作，Email: andysna@163. com。

[引用本文] 石晓娜，戎贤，郝贵强，等. 方钢管混凝土柱-H 钢梁上环下贯栓焊混合节点抗震性能数值模拟[ J]. 建筑结构,2022,52 ( 19): 118-123. SHI Xiaona,RONG Xian,HAO Guiqiang,et al. Numerical simulation on seismicperformance of concrete-filled square steel tube column-H-steel beam bolt-welded hybrid joints with upper annular plate andlower through-diaphragm connection[J]. Building Structure，2022，52(19):118-123.