Abstract

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Title:: Elastic Buckling Analysis on Steel Plate Deep Beam with Diagonal Stiffeners

Author(s):: JIANG Li-qiang; ZHENG Hong; ZHAO Peng; YUAN Xiao-sa; School of Civil Engineering, Southeast University

Keywords:: diagonal stiffener; steel plate deep beam; buckling load; threshold stiffness ratio; equivalent buckling coefficient

Abstract:: The elastic buckling behavior of steel plate deep beam with diagonal stiffeners was studied using finite element analysis software ANSYS. The influences of bending stiffness ratio, spandepth ratio, thickness of steel plate deep beam on elastic buckling were discussed; Considering bending shear stress characteristic of steel plate deep beam in steel frame, the calculation formula for buckling load of steel plate deep beam with diagonal stiffeners was introduced by using the classic theory of plate and equivalent buckling coefficient. The results show that critical buckling load increases when bending stiffness ratio increases, but the increment sharply decreases while bending stiffness ratio is equal to threshold stiffness ratio which is about 10. The critical buckling load decreases when spandepth ratio and thickness of plate decrease. The equivalent buckling coefficient increases when thickness of the plate decreases. The curves of equivalent buckling coefficient and spandepth ratio change from shape of seconddegree parabola to wave of gradient when thickness of plate decreases. It means that the mechanical properties of steel plate deep beam with diagonal stiffeners are from shear to bend.