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Numerical Study on the Flexural Performance of Fully Bolted Joint for Panelized Steel Modular Structure

I tiakina i:
I whakaputaina i:Buildings vol. 15, no. 20 (2025), p. 3807-3829
Kaituhi matua: Wang, Hao
Ētahi atu kaituhi: Li, Xuetong, Tian Conghe, Cui Jintao, Wang Xuyue, Zhao, Chuan, Li, Yanlai
I whakaputaina:
MDPI AG
Ngā marau:
Load
Modular engineering
Mechanical properties
Finite element method
Columns (structural)
Deformation
Stiffness
Buckling
Wall thickness
Bolted joints
Onsite
Friction
Construction
Stiffeners
Ultimate tensile strength
Failure modes
Steel
Ductility
Energy dissipation
Mathematical models
Seismic engineering
Modular structures
Building codes
Bearing capacity
Diaphragms
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Whakarāpopotonga:To investigate the initial rotational stiffness and ultimate moment of fully bolted connections in panelized steel modular structures, a finite element analysis was carried out on 20 joint models. High-fidelity models were developed using ABAQUS, and their accuracy was confirmed through comparison with experimental tests. A parametric study was performed to systematically evaluate the effects of the column wall thickness in the core zone, internal diaphragm configurations, angle steel thickness, and stiffener layouts on the joint stiffness and ultimate strength, leading to practical optimization suggestions. Additionally, a mechanical model and a corresponding formula for predicting the initial rotational stiffness of the joints were proposed based on the component method in Eurocode EC3. The model was validated against the finite element results, showing good reliability. Three failure modes were identified as follows: buckling deformation of the beam flange, buckling deformation of the column flange, and deformation of the joint panel zone. In joints with a weak core zone, both the use of internal diaphragms and increased column wall thickness effectively improved the initial rotational stiffness and ultimate bearing capacity. For joints with weak angle steel connections, adding stiffeners or increasing the limb thickness significantly enhanced both the stiffness and capacity. The diameter of bolts in the endplate-to-column flange connection was found to have a considerable effect on the initial rotational stiffness, but minimal impact on the ultimate strength. This study offers a theoretical foundation for the engineering application of panelized steel modular structural joints.
ISSN:2075-5309
DOI:10.3390/buildings15203807
Puna:Engineering Database