Utility analysis for SHM durations and service life extension of welds on steel bridge deck
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| Název: | Utility analysis for SHM durations and service life extension of welds on steel bridge deck |
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| Autoři: | Long, Lijia, Alcover, Isaac Farreras, Thöns, Sebastian |
| Přispěvatelé: | Lund University, Faculty of Engineering, LTH, Departments at LTH, Department of Building and Environmental Technology, Division of Structural Engineering, Lunds universitet, Lunds Tekniska Högskola, Institutioner vid LTH, Institutionen för bygg- och miljöteknologi, Avdelningen för Konstruktionsteknik, Originator |
| Zdroj: | Structure and Infrastructure Engineering. 18(4):492-504 |
| Témata: | Engineering and Technology, Civil Engineering, Infrastructure Engineering, Teknik, Samhällsbyggnadsteknik, Infrastrukturteknik, Mechanical Engineering, Reliability and Maintenance, Maskinteknik, Tillförlitlighets- och kvalitetsteknik |
| Popis: | Optimization of the duration of Structural Health Monitoring (SHM) campaigns is rarely performed. This article provides a utility-based solution to posteriorly determine: i) optimal monitoring durations and ii) the extension of the service life of the welds on a steel bridge deck. The approach is illustrated with a case study focusing on remaining fatigue life estimation of the welds on the orthotropic steel deck of the Great Belt Bridge, in Denmark. The identification of the optimal monitoring duration and the decision about extending the service life of the welds are modelled by maximizing the expected benefits and minimizing the structural risks. The results are a parametric analysis, mainly on the effect of the target probability, benefit, cost of failure, cost of rehabilitation, cost of monitoring and discount rate on the posterior utilities of monitoring strategies and the choice of service life considering the risk variability and the costs and benefits models. The results show that the decision on short-term monitoring, i.e., 1 week every six months, is overall the most valued SHM strategy. In addition, it is found that the target probability is the most sensitive parameter affecting the optimal SHM durations and service life extension of the welds. |
| Přístupová URL adresa: | https://doi.org/10.1080/15732479.2020.1866026 |
| Databáze: | SwePub |
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Nájsť tento článok vo Web of Science | Abstrakt: | Optimization of the duration of Structural Health Monitoring (SHM) campaigns is rarely performed. This article provides a utility-based solution to posteriorly determine: i) optimal monitoring durations and ii) the extension of the service life of the welds on a steel bridge deck. The approach is illustrated with a case study focusing on remaining fatigue life estimation of the welds on the orthotropic steel deck of the Great Belt Bridge, in Denmark. The identification of the optimal monitoring duration and the decision about extending the service life of the welds are modelled by maximizing the expected benefits and minimizing the structural risks. The results are a parametric analysis, mainly on the effect of the target probability, benefit, cost of failure, cost of rehabilitation, cost of monitoring and discount rate on the posterior utilities of monitoring strategies and the choice of service life considering the risk variability and the costs and benefits models. The results show that the decision on short-term monitoring, i.e., 1 week every six months, is overall the most valued SHM strategy. In addition, it is found that the target probability is the most sensitive parameter affecting the optimal SHM durations and service life extension of the welds. |
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| ISSN: | 15732479 17448980 |
| DOI: | 10.1080/15732479.2020.1866026 |