PSI - Issue 62

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

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Procedia Structural Integrity 62 (2024) 259–267

II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) On service life quantification and service life management Sebastian Thöns a , Ivar Björnsson a , Simone Celati a,b a Division of Structural Engineering, Lund University, John Ericssons väg 1, Lund 22363, Sweden a Department of Civil and Industrial Engineering, School of Engineering, University of Pisa, Largo Lucio Lazzarino 1, Pisa 56122, Italy Abstract The service life of infrastructures is of high relevance for the provision of societal and industrial functionality and sustainability. Despite this high relevance, the service life is not explicitly considered of the design and operation procedures. Towards an efficient and sustainable service life management, this paper contains a description of approaches for service life limit quantification and service life management. The service life limit quantification is based on scenario modelling for identifying technical and economical service life limits. The technical service life limit is determined with a system reliability analysis and the comparison with target reliabilities accounting for human safety requirements. The service life management approach builds upon the service life limit quantification and further includes the probabilities, benefits, cost and consequences associated to the system states throughout the service life. In this way, technical, economic and life safety models and boundaries can be jointly analysed and optimised based on decision theory. Both the technical service life quantification and the service life management approaches are exemplified through the documentation of case studies. Furthermore, the principles and key outcomes pertaining to service life quantification are summarized. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of Scientific Board Members Keywords: Existing bridges; In-Time Reliability; Corrosion; Prestressed-concrete with post-tensioned tendons Introduction The built environment plays an important role in fostering a sustainable, safe, and economically viable society. Very central to this role is the service life of infrastructures, ranging from construction to decommissioning. The termination of a structure's service life can be attributed to numerous factors. These may include structural deterioration, changing functional requirements, technological advancements, or shifting societal needs. However, it is essential to recognize that every structure, regardless of its age or condition, embodies a substantial amount of embedded carbon dioxide © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Scientific Board Members 1

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4. 0 ) Peer-review under responsibility of Scientific Board Member s

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Scientific Board Members 10.1016/j.prostr.2024.09.041