Abstract
This paper propose an improved evaluation to calculate local buckling, global buckling and coupled buckling strength of
trapezoidal corrugated steel web under shear loads. First, the local buckling and the global buckling are studied
respectively, then the interaction among local buckling, global buckling and coupled buckling strength is demonstrated.
The local buckling strength is defined as an upper limit, and this upper limit is amended down by expecting a decreasing
rate to calculate the coupled buckling strength. The proposed work gives good agreements with numerical analysis
results, which can be applied to a wide geometric range.
