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Effects of initial imperfections on nonlinear behaviors of thin-walled members

  • Ohga, M. (Department of Civil and Environmental Engineering, Ehime University) ;
  • Takaue, A. (Chodai Ltd.) ;
  • Shigematsu, T. (Tokuyama Technical College) ;
  • Hara, T. (Tokuyama Technical College)
  • 발행 : 2001.05.25

초록

The effect of the initial imperfections on the nonlinear behaviors and ultimate strength of the thin-walled members subjected to the axial loads, obtained by the finite element stability analysis, are examined. As the initial imperfections, the bucking mode shapes of the members are adopted. The buckling mode shapes of the thin-walled members are obtained by the transfer matrix method. In the finite element stability analysis, isoparametric degenerated shell element is used, and the geometrical and material nonlinearity are considered based on the Green Lagrange strain definition and the Prandtl-Reuss stress-strain relation following the von Mises yield criterion. The U-, box- and I-section members subjected to the axial loads are adopted for numerical examples, and the effects of the initial imperfections on the nonlinear behaviors and ultimate strength of the members are examined.

키워드

참고문헌

  1. Hara, T., Shigematsu, T., Ohga, M., and Imoto, N. (1997), "Combined local and global buckling behavior of thin-walled closed cross section, Int. Colloquium on Stability and Ductility of Steel Structures, 785-792.
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  3. Hinton, E. (1988), Numerical Methods and Software for Dynamic Analysis of Plates and Shells, Pineridge Press, Swansea.
  4. Ohga, M., Hara, T., and Kawaguchi, K. (1995), "Buckling mode shapes of thin-walled members", Comput. & Struct., 54(4), 767-773. https://doi.org/10.1016/0045-7949(94)00371-9
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  6. Ohga, M., Takaue, A., Shigematsu, T., and Hara, T. (1998), "Initial imperfection in FEM stability analysis of thin-walled members", Fifth Pacific Structural Steel Conference, 235-240, Seoul, October.
  7. Tesar, A., and Fillo, L. (1988), Transfer Matrix Method, Dordrecht, Kluwer Academic Publishers.
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피인용 문헌

  1. Finite element simulation for steel tubular members strengthened with FRP under compression vol.72, pp.5, 2019, https://doi.org/10.12989/sem.2019.72.5.569