Abstract
With the advancement technology for reinforced concrete structures, it becomes increasingly feasible to use this technology for steel structures. The objective of this work is to present the formulation of the optimization problem of steel beams with external pretension with straight or polygonal tracing cables, considering the environmental and economic impacts. For the objective function formulation, the minimization of CO2 emission and cost in the design of the structure were considered. As constraints were established the states limits imposed by ABNT NBR 8800:2008. The program was developed within the MATLAB Platform (MATLAB®. Guia do usuário R2016a (2016) The Math Works Inc) and the optimization problem solution was obtained through the native genetic algorithms method. Routine validation was performed using examples found in the literature and an analysis of the predominant collapse modes was performed. The results indicate that monosymmetric profiles have gains when it comes to reducing CO2 emissions and cost when compared to doubly symmetrical profiles, in addition it was observed that straight cables generate better values of CO2 emission and cost when compared to polygonal cables.
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Acknowledgements
The authors acknowledge the Brazilian Federal Government Agency CAPES for the financial support provided during the development of this research. The second author thanks the Brazilian Federal Government Agency CNPQ for the productivity research grant number 309741/2020-3.
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KMF, GFS, AFGC, ÉCA wrote the main manuscript. KMF, GFS, AFGC, ÉCA numerical simulation. AFGC, ÉCA methodology. AFGC, ÉCA supervision
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Fiorotti, K.M., Silva, G.F., Calenzani, A.F.G. et al. Optimization of steel beams with external pretension, considering the environmental and financial impact. Asian J Civ Eng 24, 3331–3344 (2023). https://doi.org/10.1007/s42107-023-00715-0
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DOI: https://doi.org/10.1007/s42107-023-00715-0