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.

doi:10.16186/j.cnki.1673-9787.2023080020

Received:2023/08/09

Revised:2023/11/17

Published: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