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http://dx.doi.org/10.7781/kjoss.2015.27.1.109

Ultimate Flexural Strength of Cylindrical Steel Shell for Wind Tower  

Ahn, Joon Tae (Dept. of Civil Eng., Myongji University)
Shin, Dong Ku (Dept. of Civil Eng., Myongji University)
Publication Information
Journal of Korean Society of Steel Construction / v.27, no.1, 2015 , pp. 109-118 More about this Journal
Abstract
Ultimate flexural buckling strength of cylindrical steel shells for the wind turbine tower structure was investigated by applying the geometrically and materially nonlinear finite element method. The effects of initial imperfection, radius to thickness ratio, and type of steel on the ultimate flexural strength of cylindrical shell were analyzed. The flexural strengths of cylindrical shells obtained by FEA were compared with design flexural strengths specified in Eurocode 3 and AISI. The shell buckling modes recommended in DNV-RP-C202 and the out-of-roundness tolerance and welding induced imperfections specified in Eurocode 3 were used in the nonlinear FE analysis as initial geometrical imperfections. The radius to thickness ratios of cylindrical shell in the range of 60 to 210 were considered and shells are assumed to be made of SM520 or HSB800 steel.
Keywords
Cylindrical shell; Flexural strength; Finite element method; Initial imperfection; Buckling strength;
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