Investigation of the effects of heavy and light welding on buckling behavior of square hollow sections: Parametric study

Authors : Osman Özenç, Mehmet Akif Dundar

Pages : 1647-1663

Doi:10.28948/ngumuh.1753771

View : 80 | Download : 31

Publication Date : 2025-10-15

Article Type : Research Paper

Abstract :This parametric study examines the influence of residual stresses from light and heavy welding on the local elastic buckling behavior of square hollow sections (SHSs) with welded corners, under axial compression and major axis bending. By analyzing various SHS sizes with a constant height-to-thickness ratio of 40, this investigation provides insights into how residual stress levels impact load-bearing capacity. Findings reveal a pronounced impact of heavy welding-induced residual stresses, notably diminishing the critical buckling loads across both loading conditions. Specifically, under axial compression, heavy welding led to a significant reduction in bifurcation loads by approximately 15.3%, while light welding caused a reduction of around 7.5%. In major axis bending, the effects were similarly considerable, with bifurcation moments reduced by approximately 12.78% for heavy welding and by 6.16% for light welding. The findings underscore the substantial effect of residual stress, particularly from heavy welding, on axial compression, indicating a greater sensitivity of SHSs to this loading condition relative to major axis bending. This study emphasizes the need for careful consideration of welding type in design practices to ensure structural reliability.
Keywords : Kare Kesitli Boş Profiller (SHS), Yerel Elastik Burkulma, Artık Gerilme, Ağır ve Hafif Kaynak, Sonlu Elemanlar Analizi

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