This paper presents an improved shear buckling resistance model for high‐strength steel (HSS) plate girders. The EN 1993‐1‐5 formulation is enhanced by revising the plastic hinge location in the flanges and consistently accounting for the relative contributions of web, flanges, and stiffeners, resulting in a more accurate representation of post‐buckling behaviour. A validated finite element model is used to perform a parametric study on welded I‐girders in S355 and S690, covering web slenderness, panel aspect ratio, flange‐to‐web section modulus ratio and stiffening configurations. The proposed model improves agreement with numerical results, increasing the mean VFEM/Vmodel from 1.09 to 1.12 and reducing the CoV to 10.6%, while markedly reducing unsafe predictions. The model delivers consistent accuracy across unstiffened, transversely stiffened, and longitudinally stiffened girders, eliminating unconservative predictions in EN 1993‐1‐5 at high flange‐to‐web ratios. Reliability analysis confirms reduced scatter and lower partial resistance factors, with γ*M1 decreasing from 1.05–1.08 to 1.01–1.02 for both S355 and S690.
Flexural and lateral–torsional buckling (LTB) may govern the construction stage of steel and steel–concrete composite girders, when the compression flange is not yet restrained by composite action. Trapezoidal profiled steel sheeting, used as permanent formwork and often directly fastened to the top flange, can contrib...
Minoas-Vasileios Bampatsikos, P. Thanopoulos· ce/papers· 0 citations
Building on previous experimental work by the authors on hybrid T‐stubs with carbon steel webs and stainless steel flanges under tension, this study presents the development and validation of an advanced finite element (FE) model capable of accurately predicting the overall behaviour, failure modes, and fracture mechan...
Abdulnasser Albanna, M. Cabrera, Huan-Xin Yuan et al.· ce/papers· 0 citations
This paper studies the failure of steel beams' webs and suggests strengthening systems. The study investigates the patch-loading resistance of I-girders with closed top-flange configurations (triangle or rectangle) formed by welding stiffener plates or angles between the web and flange edge. Non-linear finite element m...
S. Khalil, A. Matloub, A. Yousef et al.· Frattura ed Integrità Strutt...· 0 citations
This study develops a theoretical framework to assess the stability resistance of shallow-arched steel girders under pure bending. It focuses on beams with a specific curvature radius and span length, subjected to constant bending moments under simply supported conditions. Existing theories have gaps in predicting inst...
Tuan Canh Nguyen, V. S. Lo· Proceedings of the Instituti...· 0 citations
To extend the service life of existing steel bridges, assessments using state‐of‐the‐art design models that account for actual conditions have become increasingly important. This is particularly critical when actual imperfections in existing members exceed manufacturing tolerances, making it challenging to draw direct...
Ainaz Sultangirova, Michael Diener, B. Brune et al.· ce/papers· 0 citations
The mechanical response of bolted T‐stub components plays a key role in the nonlinear performance of steel joints. While existing analytical formulations provide accurate predictions for bending‐controlled collapse mechanisms, configurations connected to rigid supports and subjected to large displacements may exhibit a...
A. Francavilla, M. Latour, J. Demonceau et al.· ce/papers· 0 citations
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