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http://dx.doi.org/10.9712/KASS.2021.21.4.57

A Comparitive Study on the Shear Buckling Characteristics of Trapezoidal and Sinusoidal Corrugated Steel Plate Considering Initial Imperfection  

Seo, Geonho (Future Convergence Eng., Koreatech University)
Shon, Sudeok (Dept. of Architectural Eng., Koreatech University)
Lee, Seungjae (Dept. of Architectural Eng., Koreatech University)
Publication Information
Journal of Korean Association for Spatial Structures / v.21, no.4, 2021 , pp. 57-64 More about this Journal
Abstract
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.
Keywords
Corrugated steel plate; Shear buckling; Critical buckling stress; Linear buckling; Initial imperfection; Eigen value; Eigen buckling mode;
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