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Journal of Applied Mathematics
Volume 2013, Article ID 258721, 11 pages
http://dx.doi.org/10.1155/2013/258721
Research Article

Application of Taguchi Method and Genetic Algorithm for Calibration of Soil Constitutive Models

1Civil and Environmental Engineering Faculty, Tarbiat Modares University, Tehran 1411713116, Iran
2Civil Engineering Faculty, Islamic Azad University of Tehran, Central Tehran Branch, Tehran, Iran
3Department of Civil Engineering, University of Tabriz, Tabriz 51666-14766, Iran

Received 30 April 2013; Revised 27 August 2013; Accepted 18 September 2013

Academic Editor: Pengcheng Fu

Copyright © 2013 M. Yazdani 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

A special inverse analysis method is established in order to calibrate soil constitutive models. Taguchi method as a systematic sensitivity analysis is conducted to determine the real values of mechanical parameters. This technique was applied on the hardening soil (as an elastoplastic constitutive model) which is calibrated using the results from pressuremeter test performed on “Le Rheu” clayey sand. Meanwhile, a genetic algorithm (GA) as a well-known optimization technique is used to fit the computed numerical results and observed data of the soil model. This study indicates that the Taguchi method can reasonably calibrate the soil parameters with minimum number of numerical analyses in comparison with GA which needs plenty of analyses. In addition, the contribution of each parameter on mechanical behavior of soil during the test can be determined through the Taguchi method.