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Effective buckling length of steel column members based on elastic/inelastic system buckling analyses

  • Kyung, Yong-Soo (Department of Civil and Environmental Engineering, Sungkyunkwan University) ;
  • Kim, Nam-Il (Department of Civil and Environmental Engineering, Myongji University) ;
  • Kim, Ho-Kyung (Department of Civil Engineering, Mokpo National University) ;
  • Kim, Moon-Young (Department of Civil and Environmental Engineering, Sungkyunkwan University)
  • 투고 : 2006.10.30
  • 심사 : 2007.02.20
  • 발행 : 2007.08.20

초록

This study presents an improved method that uses the elastic and inelastic system buckling analyses for determining the K-factors of steel column members. The inelastic system buckling analysis is based on the tangent modulus theory for a single column and the application is extended to the frame structural system. The tangent modulus of an inelastic column is first derived as a function of nominal compressive stress from the column strength curve given in the design codes. The tangential stiffness matrix of a beam-column element is then formulated by using the so-called stability function or Hermitian interpolation functions. Two inelastic system buckling analysis procedures are newly proposed by utilizing nonlinear eigenvalue analysis algorithms. Finally, a practical method for determining the K-factors of individual members in a steel frame structure is proposed based on the inelastic and/or elastic system buckling analyses. The K-factors according to the proposed procedure are calculated for numerical examples and compared with other results in available references.

키워드

참고문헌

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