Comparison of Methods for Reliability Calibration of Partial Resistance Factors for Pile Foundations

Comparison of Methods for Reliability Calibration of Partial Resistance Factors for Pile Foundations

Dithinde, M.
Retief, J.

2015-10-15

Uncertainties are a hall mark of engineering design leading to the development of risk and reliability informed basis for decision making. Accordingly three different but related levels of approach, namely a risk based, a reliability based and a semi-probabilistic approach have been proposed in ISO 2394. However, for code development the semi-probabilistic approach has been internationally embraced. The approach constitutes verification method in which allowance is made for the uncertainties and variability assigned to the basic variables by means of partial factors. A number of methods for reliability calibration of partial resistance factors have been reported in the literature. These include: Advanced First-Order Second Moment Approach (A-FOSM), Mean Value First-Order Second Moment Approach (MV-FOSM), Approximate First-Order Second Moment Approach and the Design Value method. These four methods are used to derive partial resistance factors. Published resistance statistics based on a comprehensive pile load tests from the geologic region of Southern Africa are used as input in the reliability calibration process. Comparison of results shows that resistance partial factors from a full scale reliability method are comparable to those obtained from approximate methods.

pile resistance
reliability calibration
partial factor
approximations

http://resolver.tudelft.nl/uuid:f69bc549-2886-4038-9528-a61f2925a08e

https://doi.org/10.3233/978-1-61499-580-7-470

Conference proceedings

conference paper

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