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Reinforcement of Circular Steel Tubes Using Welded Casings Under Axial Compression Loading
To explore the mechanical behavior of circular steel tube components strengthened with welded casings, two groups of six specimens are designed, and two working conditions of zero-load reinforcement and load reinforcement are defined. Typical failure modes, ultimate bearing capacity, deflection curves, and strain data of measuring points are obtained. The FE modeling method considering the thermal effect of the welding process is proposed and verified. A total of 446 finite element models are established to explore the effects of the initial defects, the slenderness ratio, the boundary conditions, and the area ratio of the welded casing to the circular steel tube on the ultimate bearing capacity of the strengthened components. In addition, the ultimate bearing capacity equations for zero-load strengthened components is proposed using regression fitting and considering the adverse effects of the residual stresses due to the rolling and welding processes. Moreover, equations for calculating the deformation and the ultimate bearing capacity of the load-strengthened components considering the effect of the welding heat are also derived. Finally, the experimental, numerical, and theoretical analyses results were consistent in high calculation validity and efficiency.
Reinforcement of Circular Steel Tubes Using Welded Casings Under Axial Compression Loading
To explore the mechanical behavior of circular steel tube components strengthened with welded casings, two groups of six specimens are designed, and two working conditions of zero-load reinforcement and load reinforcement are defined. Typical failure modes, ultimate bearing capacity, deflection curves, and strain data of measuring points are obtained. The FE modeling method considering the thermal effect of the welding process is proposed and verified. A total of 446 finite element models are established to explore the effects of the initial defects, the slenderness ratio, the boundary conditions, and the area ratio of the welded casing to the circular steel tube on the ultimate bearing capacity of the strengthened components. In addition, the ultimate bearing capacity equations for zero-load strengthened components is proposed using regression fitting and considering the adverse effects of the residual stresses due to the rolling and welding processes. Moreover, equations for calculating the deformation and the ultimate bearing capacity of the load-strengthened components considering the effect of the welding heat are also derived. Finally, the experimental, numerical, and theoretical analyses results were consistent in high calculation validity and efficiency.
Reinforcement of Circular Steel Tubes Using Welded Casings Under Axial Compression Loading
Int J Steel Struct
Liu, Hongbo (author) / Hu, Jie (author) / Chen, Zhihua (author) / Wang, Longxuan (author) / Mashrah, W. A. H. (author)
International Journal of Steel Structures ; 22 ; 894-912
2022-06-01
19 pages
Article (Journal)
Electronic Resource
English
Reinforcement of Circular Steel Tubes Using Welded Casings Under Axial Compression Loading
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