Unified system reliability approach for single and group pile foundations – Theory and resistance factor calibration

Load and Resistance Factor Design (LRFD) optimization is concerned with calibrating load and resistance factors against a pre-defined target safety level. The uncertainty in soil properties, the incomplete understanding of soil-structure interaction and the lack of statistical information slowed the...

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Bibliographic Details
Published in:Computers and geotechnics 2019-04, Vol.108, p.173-182
Main Authors: Oudah, Fadi, El Naggar, M. Hesham, Norlander, Glen
Format: Article
Language:English
Subjects:
Calibration
Design factors
Design optimization
Driven piles
Limit state design
Load resistance
Load tests
LRFD
Pile
Pile foundations
Pile groups
Pile load tests
Piles
Reliability
Reliability aspects
Resistance factor
Resistance factors
Soil
Soil properties
Soil-structure interaction
Statistics
System reliability
Target reliability index
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Summary:Load and Resistance Factor Design (LRFD) optimization is concerned with calibrating load and resistance factors against a pre-defined target safety level. The uncertainty in soil properties, the incomplete understanding of soil-structure interaction and the lack of statistical information slowed the development in the field of foundation optimization. A unified target reliability index is proposed for the design of a single pile, a non-redundant pile group, and a redundant pile group foundation. Resistance factors for axially loaded drilled and driven piles based on the statistical results of over 4000 pile load tests were calibrated using the proposed approach.
ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2018.12.003