Risk-based Optimization and Reliability Levels of Coastal Structures

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Identification of optimum reliability levels for coastal structures is considered. A class of breakwaters is considered where no human injuries can be expected in cases of failure. The optimum reliability level is identified by minimizing the total costs over the service life of the structure, including building costs, maintenance and repair costs, downtime costs and decommission costs. Different formulations are considered. Stochastic models are presented for the main failure modes for rubble mound breakwaters without superstructures, typically used for outer protection of basins. The influence on the minimumcost reliability levels is investigated for different values of the real rate of interest, the service lifetime, the downtime costs due to malfunction and the decommission costs.
Original languageEnglish
Publication date2004
Number of pages13
Publication statusPublished - 2004
EventInternational Forum on Engineering Decision Making - Stoos, Switzerland
Duration: 5 Dec 20049 Dec 2004
Conference number: 1


ConferenceInternational Forum on Engineering Decision Making


Bibliographical note

PDF for print: 13 pp.


  • Coastal Structures
  • Optimum Reliability level
  • Total Cost Model
  • Stochastic Models

Cite this

Sørensen, J. D., & Burcharth, H. F. (2004). Risk-based Optimization and Reliability Levels of Coastal Structures. Paper presented at International Forum on Engineering Decision Making, Stoos, Switzerland.