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http://dx.doi.org/10.5762/KAIS.2012.13.4.1900

Finite Element Analyses on Local Buckling Strength of Polygonal-Section Shell Towers  

Park, Seong-Mi (Division of Civil Engineering, Hanbat National University)
Choi, Byung-Ho (Division of Civil Engineering, Hanbat National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.13, no.4, 2012 , pp. 1900-1907 More about this Journal
Abstract
Since the subpanels of polygonal-section shell have the corners of an obtuse angle larger than 90 degree unlike general plate or box-section structures, this could have an influence on forming nodal lines against local plate buckling or stress distributions. However, there is not sufficient material in the relevant study results or design recommendations. The very feasible models of the initial imperfections were acquired through the literature studies and then the parametric studies were conducted along with the initial imperfection models by using the finite element method. The parameters like the size of residual stresses, the portion of compressive residual stresses, and steel grades were considered. From the parametric studies, it was found that the maximum residual stress is more influential factor than the distribution pattern of residual stresses. In addition, The design strength equations for the simply supported plates can be applicable to the determination of the local buckling strength of the polygonal cross-section shell structures.
Keywords
Inelastic buckling; Design strength; Finite element analysis; Nonlinear-analysis; Polygonal section; Residual stress; Ultimate strength;
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