Simulating the service life performance of an inspected group of jacket-type structures

Ronald Schneider, Sebastian Thöns, Andreas Rogge

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

A novel method for risk-based optimization of inspection and repair strategies
for deteriorating structural systems has recently been proposed. The method
defines heuristics at the system level to reduce the number of possible strategies. For each defined strategy, it computes the updated system failure probability conditional on simulated inspection and repair histories, and evaluates the associated costs and risk. The expected total service life costs and risk for a strategy are finally determined using Monte Carlo simulation. The optimal strategy minimizes the expected total service life costs and risk. We intend to adopt this approach to optimize inspection, monitoring and repair activities for offshore wind park support structures. As a first step, we simulate – in analogy to an offshore wind park – the service life performance of an inspected group of jacket-type frames. The performance is quantified in terms of the group’s system failure probability conditional on simulated inspection and repair histories. The underlying system model accounts for the structural redundancy of the frames and the interdependence among their failure events due to similar loading conditions. The model also captures stochastic dependence among the deterioration states of the frames. As part of the simulation process the a-priori unknown outcome of any planned inspection is generated conditional on the outcome of all previous inspections.
Original languageEnglish
Title of host publicationSafety, Reliability, Risk, Resilience and Sustainability of Structures and Infrastructure : 12th Int. Conf. on Structural Safety and Reliability, Vienna, Austria, 6–10 August 2017
Publication date2017
Pages2738-2747
ISBN (Electronic)978-3-903024-28-1
Publication statusPublished - 2017
Event12th International Conference on Structural Safety and Reliability - TU Wien, Vienna, Austria
Duration: 6 Aug 201710 Aug 2017
Conference number: 12

Conference

Conference12th International Conference on Structural Safety and Reliability
Number12
LocationTU Wien
CountryAustria
CityVienna
Period06/08/201710/08/2017

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