Optimization Based Cost Comparison Between
Reinforced Concrete And Steel Beams
Author(s)
I. Merta, S. Kravanja & U. Klanšek
Abstract
This paper presents the optimization based cost comparison between reinforced
concrete and doubly-symmetrical welded steel I beams. The task of the research
was to define the spans at which each of two different considered structures
would show its advantages. The optimization/comparison was performed for
simply supported beams for spans between 5 and 30 meters and for a uniformly
distributed variable imposed load of 5 kN/m. The structural optimization was
performed by the nonlinear programming (NLP) approach. The cost objective
function was defined for the optimization and subjected to structural analysis
constraints. The structures were designed in accordance with Eurocodes for both
the ultimate and serviceability limit states. Beside the optimal self-manufacturing
costs, the results also include the optimal masses for the different considered
structures.
Keywords: structural optimization, non-linear programming, reinforced
concrete beams, steel beams.
1 Introduction
The paper presents the optimization based cost comparison between reinforced
concrete (RC) and doubly-symmetrical welded steel I beams. In order to
determine the spans at which the individual structure shows its advantages, the
cost comparison was carried out on the basis of the obtained optimal selfmanufacturing
costs. The structural optimization was performed by the nonlinear
programming (NLP) approach.
Keywords
structural optimization, non-linear programming, reinforced
concrete beams, steel beams.
Related Book
Other papers in this volume
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