Abstract

Info

Title:: Calculation Method for Overall Stability of Solid-web Girder with Multiple Holes

Author(s):: FENG Ran; MENG Shang-wei; School of Civil Engineering, Hefei University of Technology

Keywords:: solid-web girder with hole; overall stability; flexural-torsional buckling; critical moment; finite element analysis

Abstract:: In order to study the overall stability of H-shaped steel girder with multiple holes under pure bending load, the rigidities of flange and web were investigated separately. The design rules for lateral stiffness, warping stiffness and torsional stiffness of H-shaped steel girder with multiple square holes were derived theoretically to obtain the critical moments of flexural-torsional buckling. Furthermore, the critical moments of flexural-torsional buckling of Hshaped steel girder with same cross-section dimensions and different spans under pure bending load were analyzed by using the finite element software ABAQUS. The results by finite element model were compared with the results by current design code. The H-shaped steel girder with multiple square holes were analyzed by verified finite element model, and the results by finite element model were compared with the results by the derived formulae. The formulae for the critical moments of flexural-torsional buckling of Hshaped steel girder with multiple square holes were proposed based on the current design code. The results show that the practical calculation formula of steel girder with multiple square holes has high accuracy.