Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-28110 Vortrag Thöns, Sebastian Fallstudie einer Offshore-Windenergieanlage 2013 VDI Wissensforum: Bauwerksmonitoring VDI Wissensforum: Bauwerksmonitoring Hamburg, Germany 2013-04-17 2013-04-18 2016-02-20 OPUS4-28112 Vortrag Thöns, Sebastian Verfahren der Lebenszykluskurven auf der Grundlage der Tragwerkszuverlässigkeit 2013 VDI Wissensforum: Bauwerksmonitoring VDI Wissensforum: Bauwerksmonitoring Hamburg, Germany 2013-04-17 2013-04-18 2016-02-20 OPUS4-28728 Beitrag zu einem Tagungsband Thöns, Sebastian; Faber, M.H. Deodatis, G.; Ellingwood, B.R.; Frangopol, D.M. Assessing the value of structural health monitoring Structural Health Monitoring (SHM) systems are designed for assisting owners and operators with information and forecasts concerning the fitness for purpose of structures and building systems. The benefit associated with the implementation of SHM may in some cases be intuitively anticipated or proven by past experiences but in general there appears to be no rational or systematic approach for assessing the value of SHM systems a-priory to their implementation. The present paper addresses the assessment of the value of SHM with basis in structural risk assessments and the Bayesian pre-posterior decision analysis. The quantification of the value of SHM builds upon the quantification of the value of information (VoI) or rather the benefit of monitoring. The suggested approach involves a probabilistic representation of the loads and environmental conditions acting on structures as well as their responses and performances over their life-cycle. In addition, the quality of monitoring and the performance of possible remedial actions triggered by monitoring results are modeled probabilistically.The consequences accounted for, in principle include all consequences associated with the performance of the structure over its life-cycle as well as the costs associated with monitoring and possible remedial actions. The suggested approach is illustrated through two case studies concerning the monitoring of welded details in steel structures subjected to fatigue loading. The case studies address the effect of the uncertainty associated with the performance of SHM on the value of SHM. Moreover, in order to illustrate the potential of the application of approach for monitoring of structural systems an optimal strategy for SHM is determined for a system comprised of three welded details. Leiden, The Netherlands CRC Press 2013 ICOSSAR'13 - 11th International conference on structural safety and reliability - Safety, reliability, risk and life-cycle performance of structures and infrastructures (Proceedings) 978-1-138-00086-5 11th International conference on structural safety and reliability - Safety, reliability, risk and life-cycle performance of structures and infrastructures New York, USA 16.06.2013 20.06.2013 1 8 2016-02-20 OPUS4-28729 Beitrag zu einem Tagungsband Thöns, Sebastian; Lanata, F. Deodatis, G.; Ellingwood, B.R.; Frangopol, D.M. Risk and operation optimized damage detection and inspection systems Leiden, The Netherlands CRC Press 2013 ICOSSAR'13 - 11th International conference on structural safety and reliability - Safety, reliability, risk and life-cycle performance of structures and infrastructures (Proceedings) 978-1-138-00086-5 11th International conference on structural safety and reliability - Safety, reliability, risk and life-cycle performance of structures and infrastructures New York, USA 16.06.2013 20.06.2013 1 10 2016-02-20 OPUS4-25701 Vortrag Thöns, Sebastian Reliability-based inspection planning with application to orthotropic bridge deck structures subjected to fatigue 2012 IRIS Final Conference IRIS Final Conference Vienna, Austria 2012-03-19 2012-03-20 2016-02-19 OPUS4-26181 Beitrag zu einem Tagungsband Thöns, Sebastian; Döhler, M. Del Grosso, A.E.; Basso, P. Structural reliability updating with stochastic subspace damage detection information Erredi Grafiche Editoriali European association for the control of structures (EACS) 2012 EACS 2012 - Smart structures - 5th European conference on structural control (Proceedings) 978-88-95023-13-7 EACS 2012 - Smart structures - 5th European conference on structural control Genoa, Italy 2012-06-18 2012-06-20 Paper #008 1 12 2016-02-19 OPUS4-26159 Vortrag Thöns, Sebastian Structural Reliability Updating with Stochastic Subspace Damage Detection Information 2012 EACS 2012: 5th European Conference on Structural Control EACS 2012: 5th European Conference on Structural Control Genoa, Italy 2012-06-17 2012-06-20 2016-02-19 OPUS4-26160 Vortrag Thöns, Sebastian Intelligente Bauwerke - Zuverlässigkeitsbasierte Bewertung von Brückenbauwerken unter Berücksichtigung von Inspektions- und Überwachungsergebnissen 2012 Workshop Intelligente Bauwerke Workshop Intelligente Bauwerke Bergisch Gladbach, Germany 2012-06-26 2012-06-26 2016-02-19 OPUS4-26313 Zeitschriftenartikel Thöns, Sebastian; Faber, M.H.; Rücker, Werner Optimierung des Managements der Tragwerksintegrität für Offshore-Windenergieanlagen Dieser Artikel enthält aktuelle Forschungsergebnisse im Bereich des überwachungsgestützten Managements der Tragwerksintegrität. Das Management der Tragwerksintegrität hat zum Ziel, die Funktionalität eines Tragwerks während des gesamten Lebenszyklus durch Einhaltung der Zielzuverlässigkeiten sicherzustellen. Ausgehend von Forschungsergebnissen über die Charakteristik von Überwachungsverfahren und -daten im Rahmen von Zuverlässigkeitsanalysen, wird ein Ansatz vorgestellt, wie die erwarteten Kosten für das Management der Tragwerksintegrität durch Überwachungsverfahren optimiert werden können. Dazu wird eine Kosten-Nutzen-Analyse für den Lebenszyklus einer Gründungstruktur von Offshore-Windenergieanlagen durchgeführt. Im Rahmen der Bayes'schen Entscheidungstheorie werden durch eine Prä-posteriori-Entscheidungsanalyse die optimalen Entscheidungsparameter für den Entwurf eines Überwachungssystems bestimmt. Als Fallstudie wird ein Überwachungssystem für die Gründungsstruktur eines Multibrid-M5000-Prototyps konzipiert und die mögliche Reduktion der Risiken und erwarteten Betriebskosten quantifiziert. -------------------------------------------------------------------------------------------------------------------------------------------------------------------- This paper contains recent research results in the field of monitoring supported structural integrity management. The structural integrity management aims at ensuring the functioning of a structure throughout the life cycle by compliance with the target reliabilities. Building upon research results concerning the characteristics of monitoring techniques and data within the framework of reliability analyses, an approach is introduced for the optimisation of the expected structural integrity management costs by monitoring information. For this aim, a life cycle cost benefit analysis for offshore wind turbine support structures is formulated. The optimal monitoring decision parameters are then assessed utilizing the Bayesian pre-posterior decision theory. As a case study a monitoring system for a Multibrid M5000 offshore wind turbine prototype support structure is designed and possible reductions of the risks and expected costs are quantified. Berlin Ernst & Sohn 2012 Bautechnik 89 8 525 532 10.1002/bate.201200021 2016-02-19 OPUS4-26358 Zeitschriftenartikel Thöns, Sebastian; Faber, M.H.; Rücker, Werner Ultimate limit state model basis for assessment of offshore wind energy converters This paper establishes the model basis regarding the ultimate limit state consisting of structural, loading, and probabilistic models of the support structure of offshore wind energy converters together with a sensitivity study. The model basis is part of a risk based assessment and monitoring framework and will be applied for establishing the 'as designed and constructed' reliability as prior information for the assessment and as a basis for designing a monitoring system. The model basis is derived considering the constitutive physical equations and the methodology of solving these which then in combination with the ultimate limit state requirements leads to the specific constitutive relations. As a result finite element models based on shell elements incorporating a structural and a loading model are introduced and described in detail. Applying these models the ultimate capacity of the support structure and the tripod structure are determined with a geometrically and materially nonlinear finite element analysis. The observed failure mechanisms are the basis for the definition of the ultimate limit state responses. A probabilistic model accounting for the uncertainties involved is derived on the basis of literature review and measurement data from a prototype Multibrid M5000 support structure. In combination with the developed structural and loading models, sensitivity analyses in regard to the responses are performed to enhance the understanding and to refine the developed models. To this end, as the developed models necessitate substantial numerical efforts for the probabilistic response analysis predetermined designs of numerical experiments are applied for the calculation of the sensitivities using the Spearman rank correlation coefficient. With this quantification of the sensitivity of the random variables on the responses including nonlinearity the refinement of the model is performed on a quantitative basis. Fairfield, NJ American Society of Mechanical Engineers (ASME) 2012 Journal of offshore mechanics and arctic engineering 134 3 031904-1 - 031904-9 10.1115/1.4004513 2016-02-19