Bending and shear interaction behavior of girders with trapezoidally corrugated webs

• M-V interaction behaviour of steel I-girders with corrugated web is investigated.
• Previous design proposals found in the literature are studied and compared.
• Structural behaviour and stress distribution under the combined loading situation is analyzed.
• New design method is proposed for M-V interaction behaviour.

Girders with corrugated steel web is likely used in bridges as well as in building structures due to its numerous favourable properties. It is known from previous investigations that due to the web corrugation the normal and shear stress distribution in the flange and web plates of the corrugated web girders are different from the stress distribution in the conventional I-girders. The shear force in the corrugated web plate results in an additional transverse bending moment in the flanges, which indicates additional normal stresses. Previous investigations analysed this modified normal stress field and calculation methods were proposed to determine the maximum normal stresses. But there is a lack of investigations analysing the effect of the additional normal stresses on the bending resistance of the corrugated web girders. Different proposals can be found in the international literature to take this effect in the in-plane-bending resistance into account. This paper focuses on the determination of the transverse bending moment and its effect on the load carrying capacity of girders with trapezoidally corrugated webs.