龚健, 林永乐, 王新武,等.T型钢连接方钢管柱-H型钢梁节点抗震性能分析[J].河南理工大学学报（自然科学版）,2024,43(6):173-184.

GONG J, LIN Y L, WANG X W,,et al.Seismic performance analysis of square steel tubular column-H-beam joints with T-shaped steel connection[J].Journal of Henan Polytechnic University(Natural Science) ,2024,43(6):173-184.

T型钢连接方钢管柱-H型钢梁节点抗震性能分析

龚健1, 林永乐1, 王新武2, 孙海粟2, 刘欢欢2,3, 赵琦4

1.河南理工大学 土木工程学院，河南 焦作  454000；2.洛阳理工学院 河南省新型土木工程结构国际联合实验室，河南 洛阳  471023；3.武汉理工大学 理学院，湖北 武汉  430070；4.河南科技大学 土木建筑学院，河南 洛阳  471023

摘要: 目的 为了研究单边螺栓和T型钢连接的方钢管柱-H型钢梁节点的抗震特性，  方法  采用室内试验和数值模拟分析方法，对1∶2缩尺的边节点进行拟静力试验，并通过ABAQUS有限元软件进行数值模拟，综合分析边节点的滞回特性、承载力、刚度与耗能等力学特性。有限元分析变量为T型钢加肋、梁翼缘狗骨式和梁腹板开圆孔式。 结果 试验中，节点试件中连接件T型钢参与耗能且其变形最明显，梁、柱构件变形较小。塑性铰主要集中在连接构件T型钢上，T型钢腹板与翼缘交接处出现应力集中状态。试验弹性阶段，节点构件共同抵抗外部作用力。进入塑性阶段，节点损伤逐渐累积至T型钢，使T型钢最终产生塑性破坏而失效。有限元模拟中，T型钢加肋的形式对节点整体承载力影响最大，其中加3号肋的形式使节点承载力的增长量达到最大；梁翼缘狗骨式的形式对节点整体耗能能力影响最大，为44.01%。 结论  在T型钢上加肋板对节点的承载力和刚度提升较明显，对耗能能力影响不大；梁翼缘狗骨式和梁腹板开圆孔式均能提高节点的耗能能力，节点承载力和刚度基本不变；梁翼缘做狗骨式对节点抗震性能影响最显著。

关键词:T型钢;方钢管柱-H型钢梁;单边螺栓;拟静力;有限元模拟;抗震性能

doi:10.16186/j.cnki.1673-9787.2023080020

基金项目:国家自然科学基金资助项目（51678284）；中原科技创新领军人才计划项目（214200510002）；河南省高校科技创新团队项目（21IRTSTHN010）；河南省科技攻关项目（212102310969）

收稿日期:2023/08/09

修回日期:2023/11/17

出版日期:2024-09-24

Seismic performance analysis of square steel tubular column-H-beam joints with T-shaped steel connection

GONG Jian1, LIN Yongle1, WANG Xinwu2, SUN Haisu2, LIU Huanhuan2,3, ZHAO Qi4

1.School of Civil Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China；2.Henan International Joint Laboratory of New Civil Engineering Structure，Luoyang Institute of Science and Technology，Luoyang  471023，Henan，China；3.School of Science，Wuhan University of Technology，Wuhan  430070，Hubei，China；4.School of Civil Engineering and Architecture，Henan University of Science and Technology，Luoyang  471023，Henan，China

Abstract: Objectives  In order to study the seismic characteristics of square steel tubular column-H-beam joints connected by one-side bolt and T-shaped steel.  Methods  The quasi-static test of a 1：2 scale edge joint was carried out by means of indoor testing and numerical simulation analysis. The numerical simulation was performed using ABAQUS finite element software to comprehensively analyze the mechanical properties such as hysteresis characteristic bearing capacity， stiffness， and energy dissipation of the edge joint. The variables in the finite element analysis include ribbed T-shaped steel， dog-bone type beam flange， and open round hole type beam web. Results  In the test， the joint specimens mainly consisted of T-shaped steel， which participated in energy dissipation， and its deformation was the most pronounced， while the deformation of beam and column members was minimal. The plastic hinges of such edge joints were mainly concentrated on the T-shaped steel of the connecting member， and stress concentration occured at the junction of the T-shaped steel web and the flange. In the elastic stage of the test， the joint members resisted the external force together. In the plastic stage， the joint damage gradually accumulated in the T-shaped steel， causing it to eventually undergo plastic failure. In the finite element simulation， the configuration of the T-shaped steel ribs had the greatest influence on impact improving the overall bearing capacity of the joints， with the addition of 3# rib configuration resutting in the maximum increase in bearing capcity； the dog-bone type beam flange had the greatest influence on the overall energy dissipation capacity of the joint， increasing it by 44.01%.  Conclusions   Adding ribs to the T-shaped steel significantly improves the bearing capacity and stiffness of the joint， with little effect on the energy dissipation capacity. The energy dissipation capacity of the joints can be improved by the dog-bone beam flange and the open hole beam web， while the bearing capacity and stiffness of the joint remain basically unchanged. Among the three variables， the dog-bone beam flange has the most significant effect on the seismic performance of the joint.

Key words:T-shaped steel;square steel tubular column-H-beam;one-side bolt;quasi-static;finite element simulation;seismic performance