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Steel and Composite Structures Volume 19, Number 2, August 2015 , pages 503-519 DOI: https://doi.org/10.12989/scs.2015.19.2.503 |
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Optimum design of steel space frames with composite beams using genetic algorithm |
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Musa Artar and Ayşe T. Daloğlu
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| Abstract | ||
| This paper presents an optimization process using Genetic Algorithm (GA) for minimum weight by selecting suitable standard sections from a specified list taken from American Institute of Steel Construction (AISC). The stress constraints obeying AISC-LRFD (American Institute of Steel Construction - Load and Resistance Factor Design), lateral displacement constraints being the top and inter-storey drift, mid-span deflection constraints for the beams and geometric constraints are considered for optimum design by using GA that mimics biological processes. Optimum designs for three different space frames taken from the literature are carried out first without considering concrete slab effects in finite element analyses for the constraints above and the results are compared with the ones available in literature. The same optimization procedures are then repeated for the case of space frames with composite (steel and concrete) beams. A program is coded in MATLAB for the optimization processes. Results obtained in the study showed that consideration of the contribution of the concrete on the behavior of the floor beams results with less steel weight and ends up with more economical designs. | ||
| Key Words | ||
| genetic algorithm; weight optimization; space frame; composite beams; fem analysis | ||
| Address | ||
| (1) Musa Artar: Department of Civil Engineering, Bayburt University, Bayburt 69000, Turkey; (2) Ayşe T. Daloğlu: Department of Civil Engineering, Karadeniz Technical University, Trabzon 61000, Turkey. | ||