A Generalized Formula for Elastic Shear Buckling of Trapezoidal Corrugated Web Girder

摘要

Trapezoidal corrugated web girder is widely used. The elastic shear buckling stress is an important parameter in the design and calculation of trapezoidal corrugated web girder. Accordingly, much research has been devoted on the analysis of typical elastic global shear buckling, elastic local buckling and elastic interactive shear buckling, and the corresponding formulae existing in a variety of literature. The results of finite element analysis suggest that there is a certain deviation in the calculated values based on classical elastic shear buckling formulae. The boundary conditions of corrugated web play an important role in the calculation of elastic shear buckling. And it is found that the shear buckling modes of the actual trapezoidal corrugated web may be called the atypical buckling, which is different from typical local buckling, global buckling and interactive buckling. The existence of the atypical buckling may result in some calculation deviations for the existing formulae of elastic shear buckling. Based on the classical elastic shear buckling formulae, a generalized formula for elastic shear buckling of trapezoidal corrugated web girder is obtained by numerical simulation. It intuitively reflects the relationships among various buckling modes. The formula has high calculation reference value and will promote the research of elastic shear buckling of trapezoidal corrugated web girder.