Resumen

LEYVA MADRIGAL, Herian A. et al. Optimal inelastic design of reinforced concrete frames with buckling restrained braces. Ing. sísm [online]. 2023, n.111, pp.80-99.  Epub 06-Dic-2024. ISSN 0185-092X.  https://doi.org/10.18867/ris.111.640.

Currently, the combination of optimization techniques with the seismic design of buildings has proven to be a great alternative to obtain optimal designs in one or more desired aspects such as cost, weight, seismic and environmental performance, among others. Likewise, the use of buckling restrained braces has gained popularity due to its outstanding contribution to seismic energy dissipation. Therefore, in the present manuscript the multi-objective design of dual systems composed by braced reinforced concrete frames with BRB is presented. The procedure is based on the Non-Dominated Sorting Genetic Algorithm (NSGA-II) optimization approach and two objective functions: initial cost and seismic performance. To evaluate the seismic performance, the average response of the structure is calculated through non-linear dynamic analysis under the action of eight narrow-band seismic records. In addition, the average local Park and Ang damage index is considered a constraint function. The approach was applied for two 9- and 12-story buildings considering the columns, beams and BRB’s sections as problem variables. The results demonstrate the efficiency of the application of NSGA-II technique in the non-linear seismic design of dual systems to achieve economical, lightweight and safe designs sets quickly and efficiently.

Palabras llave : multi-objective design; optimization; cost; damage index.

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