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Nonlinear Inelastic Analysis of 3-Dimensional Steel Structures Using Fiber Elements  

Kim, Seung-Eock (세종대학교 토목환경공학과)
Oh, Jung-Ryul (세종대학교 대학원)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.19, no.4, 2006 , pp. 347-356 More about this Journal
Abstract
In this paper, practical nonlinear inelastic analysis method of 3-dimensional steel structures accounting for gradual yielding with fibers on a section is developed. Geometric nonlinearities of member(p-$\delta$) and frame(p-$\Delta$) are accounted for by using stability functions. Residual stresses are considered by assigning initial stresses to the fiber on the section. The elastic core in a section is investigated at every loading step to determine the axial and bending stiffness reduction. The strain reversal effect is captured by investigating the stress change of each fiber. The proposed analysis proves to be useful in applying for practical analysis and design of three-dimensional steel frames.
Keywords
nonlinear inelastic analysis; steel structure; fiber element; gradual yielding; residual stress; strain reversal effect;
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