Numerical analysis on seismic behaviour of column-column-beam joint for panelised steel-modular structure
Hao Wang,Conghe Tian,Xuetong Li,Jintao Cui,Xuyue Wang,Chuan Zhao,Yanlai Li
Abstract
Panelised modular steel structures integrate the merits of high prefabrication integration and low transportation costs, thereby showcasing extensive application prospects in contemporary structural engineering. This study performs a systematic finite element investigation on the seismic behaviour of 16 column-column-beam joints for panelised steel-modular structure, clarifies the influence regularity of key structural parameters (including the wall thickness of the core zone and the arrangement of internal diaphragms) on critical seismic performance indices, and develops a calculation formula for the flexural bearing capacity of the joints along with a theoretical moment-rotation model. The results indicate that for joints with a weak core zone, both the incorporation of internal diaphragms and the thickening of column walls can effectively enhance the mechanical performance of the joints, and the reinforcing effect of internal diaphragms is more prominent. For joints featuring weak angle steels, the addition of stiffeners can significantly improve the energy dissipation capacity of the joints; when the leg thickness of the angle steel reaches a specific threshold, varying the thickness of the beam end plate exerts a marginal effect on the improvement of joint bearing capacity. The deviation between the theoretical values of flexural bearing capacity derived based on the minimum bearing capacity principle and the finite element simulation results is within 8%. Furthermore, the moment-rotation curve model established based on the Ramberg-Osgood empirical formula achieves good consistency with the finite element data. These research outcomes provide a reliable theoretical foundation for the overall performance analysis and engineering design of panelised modular steel structures.
Hao Wang — 1) School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2) College of Civil Engineering, Tianjin Chengjian University, Tianjin 300384, China; 3) Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin 300384, China
Conghe Tian, Xuetong Li, Jintao Cui, Xuyue Wang — College of Civil Engineering, Tianjin Chengjian University, Tianjin 300384, China
Chuan Zhao, Yanlai Li — China MCC22 Group Co., Ltd., Tangshan 063000, Hehei, China
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