Cost Optimization Of Composite Floors
Author(s)
S. Kravanja & U. Klanšek
Abstract
The paper presents the cost optimization of composite floors. The composite
structure consists of a reinforced concrete slab and welded steel Pratt trusses
built up of hot rolled channel sections. The structural optimization is performed
by the nonlinear programming (NLP) approach taking into account design
constraints defined according to Eurocodes. A detailed objective function of the
manufacturing material, power and labour costs is subjected to structural analysis
constraints. In this way, the obtained optimal structural design satisfied the
conditions of both the ultimate and the serviceability limit states. An example of
the optimization of the composite truss floor system is presented at the end of the
paper in order to show the applicability of the proposed approach.
Keywords: structural optimization, non-linear programming, composite
structures, costs.
1 Introduction
The economy of construction is commonly handled in engineering practice by
the time-consuming structural analysis of various design alternatives. In the
conceptual design stage, the costs related with a change in the structural design
are low. The possibilities of such a change to decrease (or increase) the costs in
the construction stage are numerous. Since the significant cost savings may be
obtained on account of effective conceptual design, the importance of accurate
structural cost optimization cannot be overemphasized.
Over the last three decades, researches and engineers have mainly considered
the cost optimization of composite structures from the viewpoint of the
development and application of different optimization techniques [1–4]. Majority
of the performed research works include simplified cost objective functions with
fixed cost parameters.
Keywords
structural optimization, non-linear programming, composite
structures, costs.
Related Book
Other papers in this volume
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