This paper conducted a comparative analysis of the shear buckling characteristics of trapezoidal and sinusoidal corrugated steel plates considering of their initial imperfection. Initial imperfection refers to the state where the shape of the corrugated plate is initially not perfect. As such, an initially imperfect shape was assumed using the eigen buckling mode. To calculate the buckling stress of corrugated steel plates, the linear buckling analysis used a boundary condition which was applied to the plate buckling analysis. For the comparison of trapezoidal and sinusoidal corrugation, the shape parameters were assumed using the case where the length and slope of each corrugation were the same, and the initial imperfection was considered to be from 0.1% to 5% based on the length of the steel plate. Here, for the buckling analysis, ANSYS, a commercial FEA program, was used. From the results of buckling analysis, the effect of overall initial imperfection showed that the larger the initial imperfection, the lower the buckling stress. However, in the very thin model, interaction or local buckling was dominant in the perfect shape, and in this case, the buckling stress did not decrease. Besides, the sinusoidal model showed higher buckling stress than the trapezoidal one, and the two corrugation shapes decreased in a similar way.

Corrugated plate is occurrence that the local buckling, global buckling and interactive buckling because of the geometric properties. However, It was difficult to predict the shear buckling behavior. This study analyzed the elastic shear buckling about geometric parameters of sinusoidal and trapezoidal corrugated plate.

Corrugated plate is made that the local buckling, global buckling and interactive buckling occurs because of the geometric properties such as the accordion effect.Corrugated steel having such characteristics is shows a buckling characteristic different from the plate. However, It was a design by the basis of the shear buckling equation of plate. Therefore, this study was investigate the characteristics of the shear buckling mode and shear buckling stress of sinusoidal corrugated plate through a parametric study using the finite element method.

This study was evaluate the shear buckling characteristic of sinusoidal corrugated plate. We analyzed the effect on shear buckling about shape parameter based on the design equations proposed as a theoretical method shown in the existing studies. We was performed the eigenvalue analysis about sinusoidal corrugated plate using finite element analysis program. and then, This result was analyzed the shear buckling tendencies and verified the buckling characteristic changes.

In order to realize these weight lightening, structure was used to high strength thin plate. If thin plate structure is used, buckling about compression is happen so we should consider buckling. Commonly, we use the girder with stiffener to prevent shear buckling but if we use corrugated web, it can be the role of stiffener to buckling This study is developed of program about optimum problem using structure design process and real-valued genetic algorithm. For the optimum design, the objective function is defined weight of sinusoidal corrugated web and conduct by optimization. The program is analyzed by example.