Shear resistance of bridge I-girders with diagonal stiffener - design proposal

Ljubinković, Filip (avtor), Zoubek, Sara (avtor), Martins, João Pedro (avtor)

Steel I-girders with diagonal stiffeners offer an effective means of increasing shear resistance in bridge applications by enhancing both elastic buckling and post-buckling resistance. However, no dedicated design rules exist for such configurations in current structural design standards, particularly for carbon steel girders. This study addresses this gap through an extensive numerical investigation of the shear buckling behaviour and ultimate resistance of web panels stiffened along the compression diagonal. A finite element model (FEM), validated against full-scale experiments, supports a broad parametric study covering aspect ratio, web slenderness, stiffener rigidity and geometric imperfections. The numerical results are used to assess existing resistance models, to develop a new expression for the shear buckling coefficient, and to propose several design models for ultimate shear resistance. A reliability assessment confirms compliance with Eurocode target safety levels. The study provides the first validated and comprehensive design framework for carbon-steel I-girders with diagonal stiffeners placed along the compression diagonal, bridging a key gap in current design standards and enabling more efficient and reliable shear design of steel bridge girders.

• Jezik: Angleški jezik
• Ključne besede: civil engineering, steel I-girders, diagonal stiffeners, shear buckling coefficient, shear buckling resistance, design model, FEM, reliability
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Datum objave: 30.03.2026
• Leto izida: 2026
• Št. strani: 20 str.
• Številčenje: art. 110361, Letn. 242
• PID: 20.500.12556/RUL-181467
• UDK: 624.014
• ISSN pri članku: 0143-974X
• DOI: 10.1016/j.jcsr.2026.110361
• COBISS.SI-ID: 274407939
• Datum objave v RUL: 08.04.2026

Gradivo je del revije

• Naslov: Journal of constructional steel research
• Skrajšan naslov: J. Constr. steel res.
• Založnik: Elsevier Science
• ISSN: 0143-974X
• COBISS.SI-ID: 1326341

Licence

• Licenca: CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
• Opis: Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: gradbeništvo, jekleni I-nosilci, diagonalne ojačitve, koeficient strižnega uklona, strižna nosilnost, računski model, metoda končnih elementov, MKE, zanesljivost

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P2-0158-2018
• Naslov: Gradbene konstrukcije in gradbena fizika