Proceedings of the
8th International Symposium on Geotechnical Safety and Risk (ISGSR)
14 – 16 December 2022, Newcastle, Australia
Editors: Jinsong Huang, D.V. Griffiths, Shui-Hua Jiang, Anna Giacomini, Richard Kelly
doi:10.3850/978-981-18-5182-7_18-010-cd
Time-Dependent Reliability Analysis of an Existing Sheet Pile Wall Case Study
1Geo-Engineering Unit, Deltares, P.O. Box 177, 2600 MH Delft, The Netherlands.
2Structural Engineering Department, TNO, Built Environment and Geosciences, P.O. Box 155, 2600 AD Delft, The Netherlands.
ABSTRACT
This paper presents the time-dependent reliability analysis of a case study of a sheet pile wall, incorporating the degrading effects of corrosion and the reliability increasing effects of the proven service, i.e. the survived years until the year of assessment. The results show a decrease of the reliability over time due to corrosion, and an increase of the reliability due to the survived years. The results show a shift of the influence coefficients from the time-invariant soil parameters (which's uncertainty reduces) to the time-variant (load) parameters. The uncertainty reduction potentially leads to more favorable partial factors for the assessment of existing structures. Further, the results highlight the influence of corrosion uncertainty and model uncertainty, two factors which are currently not explicitly covered by a partial factor in the guidelines for existing structures.
Keywords: Reliability analysis, Sheet pile, Past performance, Degradation.
