A new shear strength model for steel corrugated web girders. (October 2022)

• Record Type: Journal Article
• Authors: Alikhanifard, Mohammad Amin; Rahai, Ali Reza; Tehrani, Payam
• Is Part Of: Journal of constructional steel research. Volume 197(2022)
• Publication Date: 2022-10
• Subjects: Steel corrugated web girder -- Interaction buckling -- Shear buckling model -- Finite element modeling -- Corrugation geometry -- Optimum design; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2022.107457
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: Steel corrugated web girders have three shear failure modes: local, global, and interaction shear buckling. Despite several research studies, only EN1993-1-5 provisions have a design manual for such beams. However, this code does not consider the interaction buckling mode in design equations, while many researchers have emphasized the importance of this instability aspect. In this paper, the EN design manual is improved by considering interaction shear buckling mode, and a new model for the shear strength design of these girders is developed. The accuracy of the proposed model is verified by comparing it with the previously published models and available experimental test data in the literature. An extensive statistical and finite element analysis (FEA) is conducted to evaluate the model for various geometry and material specifications. Results demonstrate that the proposed model is more reliable than those previously reported. The effects of corrugation geometry on the shear strength of these beams are discussed in detail, and a logical geometry range is specified. An equation is also presented for corrugation specifications to achieve the maximum shear capacity. Furthermore, some limitations are defined for the corrugation angle and longitudinal to inclined fold width ratio to reduce the beam weight and reach the optimum design. Based on the recommendations from this research, the corrugation geometry of some existing bridges is modified, and their shear capacity and weight per unit length are compared with the original corrugations using FEA. Results show the effectiveness of the proposed limitations and equation for corrugation geometry. Graphical abstract: Unlabelled Image Highlights: A new shear strength model for steel corrugated web girders is developed by considering the interaction buckling mode in the EN1993-1-5 model. The accuracy of the proposed model is demonstrated by comparing it with previously published models and available test data in the literature. Finite element and statistical analyses are carried out to demonstrate that the proposed model is more accurate than the existing models. An equation is proposed for the geometric parameters of corrugated web girders. Furthermore, the logical range for corrugation parameters is proposed and some limitations are defined for them to reduce the beam weight and attain the optimum design. The effectiveness of the proposed limitations and equation for corrugated geometry parameters is demonstrated by finite element analysis.