Title
Target reliability indices for existing quay walls derived on the basis of economic optimisation and human safety requirements
Author
Roubos, A.
Allaix, D.
Fischer, K.
Steenbergen, R.
Jonkman, S.
Publication year
2020
Abstract
General frameworks for reliability differentiation have evolved over time and are mainly developed for buildings. However, recommendations for the safety of existing quay walls are lacking. In this study, target reliability indices for assessing existing quay walls were derived by economic optimisation and by evaluating the requirements concerning human safety. In quay-wall design, some dominant stochastic design variables are largely time-independent, such as soil and material properties. The influence of time-independent variables on the evolution of the probability of failure was taken into consideration, since this affects the present value of future failure costs and the associated target reliability indices. The target reliability indices obtained for existing quay walls depend on the consequences of failure and the remaining lifetime. If the failure modes of a quay wall are governed by time-independent design parameters and the quay wall has already survived the early service period, the residual probability of failure is lower for an existing quay wall compared to a new structure. Hence, this should be considered in the determination of target reliability indices. The method to evaluate quay-wall reliability over time can also be used to assess other civil and geotechnical structures. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.
Subject
Buildings and Infrastructures
2015 Urbanisation
Corrosion
Existing quay walls
Human safety
Past performance
Probability of failure
Risk acceptance criteria
Target reliability index
To reference this document use:
http://resolver.tudelft.nl/uuid:ab9deb72-f55f-465d-9c6a-91af9abdfdb3
DOI
https://doi.org/10.1080/15732479.2019.1699937
TNO identifier
871943
Publisher
Taylor and Francis Ltd.
ISSN
1573-2479
Source
Structure and Infrastructure Engineering, 1-13
Document type
article