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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 102
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Paper 202

Advantages of Using a Recently Developed Full Characterization Method Over FORM

R.H. Lopez1, L.F. Fadel Miguel1, J.E.S. de Cursi2 and A. El-Hami2

1Civil Engineering Department
Federal University of Santa Catarina, Florianopolis, Brazil
2Mechanical Engineering Department
National Institute of Applied Sciences (INSA), Rouen, France

Full Bibliographic Reference for this paper
R.H. Lopez, L.F. Fadel Miguel, J.E.S. de Cursi, A. El-Hami, "Advantages of Using a Recently Developed Full Characterization Method Over FORM", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 202, 2013. doi:10.4203/ccp.102.202
Keywords: uncertainty quantification, reliability analysis, nonlinear limit state functions, full characterization, FORM.

Although the first order reliability method (FORM) has been widely applied to approximate the probability of failure of engineering systems, it possesses some serious drawbacks, such as, low accuracy and convergence issues. One class of reliability methods that are able to improve the accuracy are the full characterization methods. The solution of these methods is claimed to be very complex, leading to high, sometimes prohibitive, computational cost, especially when compared to FORM. However, the full characterization method recently presented by the authors was shown to be simple to implement, more accurate and of low computational cost. Thus, the main goal of this paper is to demonstrate that it overcomes all the drawbacks of the FORM. Several analytical functions were tested. In all the cases, the full characterization method reached a much better accuracy than the FORM. Furthermore, the computational cost of the proposed method is at least of the same order or lower than the FORM.

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