Reliability of axial pile capacity calculation methods
Suzanne Lacasse, Farrokh Nadim, Siren Knudsen, Unni K. Eidsvig, Zhongqiang Liu, Gülin Yetginer, Tom R. Guttormsen
In the proceedings of: GeoMontréal 2013: 66th Canadian Geotechnical Conference; 11th joint with IAH-CNCSession: Reliability-based Design
ABSTRACT: The reliability of pile foundations under severe environmental loading offshore depends on the uncertainty in the parame-ters in the analyses. To evaluate the required resistance factor for foundation design, the annual probability of failure was quantified for three jackets. The study included a statistical evaluation of the soil and load parameters and model un-certainty, the deterministic and probabilistic analyses of the ultimate axial pile capacity, the calculation of the annual probability of failure and the calibration of the required resistance factor for a target annual probability of failure of 10-4. The results show that the annual probability of failure varies with the axial pile capacity calculation method, and strongly depend on the model uncertainty applied.
RÉSUMÉ: Dans le dimensionnement des piles, l'ingénieur se doit d'assurer une marge de sécurité suffisante. La fiabilité d'un calcul dépend des incertitudes dans les paramètres d'analyse et le modèle de calcul. Afin d'évaluer les facteurs partiels de sé-curité requis, la probabilité annuelle de rupture a été calculée pour trois structures offshore. L'analyse de fiabilité a fait l'évaluation statistique des chargements et paramètres de sols, l'analyse déterministe et probabiliste de la capacité ul-time axiale, le calcul de la probabilité annuelle de rupture et le calibrage des facteurs partiels de sécurité requis pour assurer une probabilité de rupture annuelle inférieure à 10-4. La probabilité annuelle et la marge de sécurité varient avec la méthode de dimensionnement et les incertitudes du modèle.
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Suzanne Lacasse; Farrokh Nadim; Siren Knudsen; Unni K. Eidsvig; Zhongqiang Liu; Gülin Yetginer; Tom R. Guttormsen (2013) Reliability of axial pile capacity calculation methods in GEO2013. Ottawa, Ontario: Canadian Geotechnical Society.
@article{GeoMon2013Paper698,
author = Suzanne Lacasse; Farrokh Nadim; Siren Knudsen; Unni K. Eidsvig; Zhongqiang Liu; Gülin Yetginer; Tom R. Guttormsen,
title = Reliability of axial pile capacity calculation methods,
year = 2013
}
title = Reliability of axial pile capacity calculation methods,
year = 2013
}