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Optimum Design of Plane Steel Frame Structures Using Refined Plastic Hinge Analysis and SUMT  

Yun, Young Mook (경북대학교 토목공학과)
Kang, Moon Myoung (경북대학교 건축공학과)
Lee, Mal Suk (경북대학교 대학원 건축공학부)
Publication Information
Journal of Korean Society of Steel Construction / v.16, no.1, 2004 , pp. 21-32 More about this Journal
Abstract
In this study, a continuous optimum design model with its application program for plane steel frame structures developed. In the model, the sequential unconstrained minimization technique (SUMT) transforming the nonlinear optimization problem with multidesign variables and constraints into an unconstrained minimization problem and the refined plastic hinge analysis method as one of the most effective second-order inelastic analysis methods for steel frame structures were implemented. The total weight of a steel frame structure was taken as the objective function, and the AISC-LRFD code requirements for the local and member buckling, flexural strength, shear strength, axial strength and size of the cross-sectional shapes of members were used for the derivation of constraint equations. To verify the appropriateness of the present model, the optimum designs of serveral plane steel frame structures subject to vertical and horizontal loads were conducted.
Keywords
refined plastic hinge analysis; sequential unconstrained minimization technique; continuous optimum design model; plane steel frame structure;
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