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Volume Title: ICASGE2023

DOI: ICASGE-STL

¹Yasmin Ali ; ²Ahmed El Hadidy; ²Mahmoud El-Boghdadi; Ahmed El Hadidy

¹Faculty of Engineering, Delta University for Science & Technology, Gamasa City, Mansoura, Egypt

²Faculty of Engineering, Tanta University, Egypt

One of the efficient techniques to enhance the shear resistance of I-section plate girders is to replace their conventional flat flanges with tubular ones; thus, developing hollow flange plate girders (HFPGs). In the post buckling stage, HFPGs resist a considerable amount of the applied shear loading by the tension field action which develops diagonally through the web panels. Accordingly, utilizing diagonal stiffeners might improve the shear resistance of HFPGs since they could contribute to the tension forces resistance through developed tension band. Therefore, this paper presents a numerical investigation of diagonally stiffened HFPGs (D-HFPGs) to evaluate their shear resistance. The HFPGs under consideration have compression tubular flange and tension flat flange. The key parameters of the conducted parametric study included web thickness, span length, and web panel aspect ratio. On this basis, elaborate finite element (FE) models that considered material and geometric nonlinearities were developed and validated by the FE software Ansys Workbench (2020 R1). The mode of failure, elastic shear buckling load, ultimate shear resistance, and load-displacement behavior were all extracted from the FE model solutions and comprehensively analyzed. Moreover, a comparison was made between the shear resistance of D-HFPGs and corresponding transversely stiffened HFPGs (T-HFPGs). The results showed that utilizing diagonal stiffeners can efficiently enhance the shear resistance as well as ductility of HFPGs.

Hollow flange plate girder; Diagonal stiffener; Elastic shear buckling load; Shear resistance; Shear failure

Steel Structures (STL)