Journal ArticleDOI
Optimum design of lattice portal frames
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TLDR
In this article, the minimum weight design of lattice portal frames is a nonlinear optimization problem which has been solved by using Rosen's gradient projection method, and the results of a parametric study carried out using the (OPTFRAM) computer program are presented for use in day to day design.Abstract:
Lattice portal frame structures fabricated using hot rolled angle sections for corner leg members laced together are often very economical systems for industrial structures. There is considerable flexibility in the design of such structures in terms of the spacings between and the unsupported lengths of corner leg members, besides the areas of the different elements of the frame. The minimum weight design of these frames is a nonlinear optimization problem which has been solved by using Rosen's gradient projection method. A computer program OPTFRAM, developed for the minimum weight design of lattice portal frames used in industrial structures, is described. This paper also presents the results of a parametric study carried out using the (OPTFRAM) computer program. Regression equations obtained from this study arc presented for use in day to day design.read more
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Journal ArticleDOI
The Gradient Projection Method for Nonlinear Programming. Part I. Linear Constraints
TL;DR: The gradient projection method was originally presented to the American Mathematical Society for solving linear programming problems by Dantzig et al. as discussed by the authors, and has been applied to nonlinear programming problems as well.
Journal ArticleDOI
Automated Design of Frame Structures
Dag Kavlie,Johannes Moe +1 more
TL;DR: Methods of automated design and optimization of statically indeterminate frames by means of nonlinear programming are reviewed, with particular emphasis on the sequential unconstrained minimization technique (SUMT) employed by the writers.
Journal ArticleDOI
Structural Optimization by Nonlinear Programming
TL;DR: In this article, the optimization of structural design is formulated as a problem in nonlinear mathematical programming, i.e., a problem of selecting n design variables subject to m > n constraints such that an objective function is minimized.
Journal ArticleDOI
Optimal design of reinforced concrete frames based on inelastic analysis
C. S. Krishnamoorthy,D. R. Mosi +1 more
TL;DR: In this article, a formulation for the nonlinear optimization of reinforced concrete frames based on inelastic analysis is presented and four selected frames are optimized using the program and the results are presented.