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http://dx.doi.org/10.12989/sem.2007.26.6.651

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)
Publication Information
Structural Engineering and Mechanics / v.26, no.6, 2007 , pp. 651-672 More about this Journal
Abstract
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.
Keywords
inelastic system buckling; effective buckling length; column; plane frame; tangent modulus theory;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 0
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