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Computers and Concrete
  Volume 11, Number 3, March 2013, pages 253-270
DOI: http://dx.doi.org/10.12989/cac.2013.11.3.253
 


Structural optimization and proposition of pre-sizing parameters for beams in reinforced concrete buildings
Guilherme Fleith de Medeiros and Moacir Kripka

 
Abstract
    The aim of the present paper is to show the application of optimization strategies for the cost of beams in reinforced concrete buildings and to propose pre-sizing parameters. In order for these goals to be met, an optimization software program was developed. The program combines the analysis of structures by the grid model, reinforced concrete sizing, and the simulated annealing optimization heuristic. Sizing is compliant with the NBR 6118 (2007) Brazilian standard, according to which flexural, shearing, torsion, and web reinforcements and serviceability limit states (deflection and crack width limitation) are checked. Besides the dimensions of the situations mentioned above, the influence the cost of each material (steel, concrete and formwork) has on the overall cost of structures was also determined.
 
Key Words
    optimization; beams; reinforced concrete; grid model; simulated annealing
 
Address
Guilherme Fleith de Medeiros and Moacir Kripka: Engineering Graduate Program, University of Passo Fundo, Passo Fundo, Brazil
 

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