Steel and Composite Structures
Volume 58, Number 6, 2026, pages 739-763
DOI: 10.12989/scs.2026.58.6.739
Inelastic shear buckling and post-buckling analysis of steel web posts with rectangular openings
Ju-Hyung Kim , Young Hak Lee , Jang-Woon Baek , Dae-Jin Kim
Abstract
This paper introduces simplified mechanics-based modeling approaches to comprehend the shear behavior of steel beams with web openings. The behavior of the web posts was numerically investigated, encompassing elastic buckling, inelastic buckling, and post-buckling behavior. Model outcomes indicated that web openings amplify shear stress in the web posts, leading to premature shear buckling. Upon validating the approaches against test data, the shear resistance of the web posts with openings was quantified considering pre- and post buckling behavior, which are linked to the geometric properties of the beam. A practical design methodology is proposed to ensure flexure failure while preventing shear failure of web posts with sequential openings.
Key Words
finite difference method; inelastic buckling; steel beam; tension field action; web opening; web post
Address
- Ju-Hyung Kim — Department of Architecture, Ajou University, 206, World cup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, Republic of Korea
- Young Hak Lee — Department of Architectural Engineering, Kyung-Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, Republic of Korea
- Jang-Woon Baek — Department of Architectural Engineering, Kyung-Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, Republic of Korea
- Dae-Jin Kim — Department of Architectural Engineering, Kyung-Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do, Republic of Korea
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