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Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 679026, 9 pages
http://dx.doi.org/10.1155/2013/679026
Research Article

A New Spectral Shape-Based Record Selection Approach Using and Genetic Algorithms

1Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Ciudad Universitaria, Calzada de las Américas y Boulevard Universitarios S/N, 80040 Culiacán Rosales, SIN, Mexico
2Coordinación de Mecánica Aplicada, Instituto de Ingeniería, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Coyoacán, DF, Mexico

Received 27 September 2012; Revised 13 December 2012; Accepted 13 December 2012

Academic Editor: Wei-Chiang Hong

Copyright © 2013 Edén Bojórquez et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

With the aim to improve code-based real records selection criteria, an approach inspired in a parameter proxy of spectral shape, named , is analyzed. The procedure is based on several objectives aimed to minimize the record-to-record variability of the ground motions selected for seismic structural assessment. In order to select the best ground motion set of records to be used as an input for nonlinear dynamic analysis, an optimization approach is applied using genetic algorithms focuse on finding the set of records more compatible with a target spectrum and target values. The results of the new -based approach suggest that the real accelerograms obtained with this procedure, reduce the scatter of the response spectra as compared with the traditional approach; furthermore, the mean spectrum of the set of records is very similar to the target seismic design spectrum in the range of interest periods, and at the same time, similar values are obtained for the selected records and the target spectrum.