PSI - Issue 84

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 84 (2026) 1310–1317

© 2026 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 the scientific committee of the Conference Keywords: Type your keywords here, separated by semicolons ; 1. Introduction Extending the service life of infrastructure systems has become a key strategy for promoting resource efficiency and supporting sustainability and risk-informed asset management. Increasing research efforts, including studies e.g., by Thöns, Faber and Val (2017) and Long, Alcover and Thöns (2021), investigate service life extension decisions across different types of infrastructure, showing that such interventions can enhance both economic and safety performance, particularly when integrated with optimized monitoring strategies. Focusing on the design phase, recent studies by Hingorani and Köhler (2025) and Khouri Chalouhi, Zelmanovitz Ciulla et al. (2023) indicate emission reduction Abstract As existing transport infrastructure continues to age and traffic demand rises, there is a growing urgency to reduce emissions. In this context, extending the service life of infrastructure emerges as a key strategy. This paper introduces a basic decision-analytical approach to infrastructure service life extension with an integrated model basis. The model basis facilitates the joint assessment of structural reliability, risk, life cycle costs, and environmental impacts. The methodology is demonstrated through a case study of the Øresund Fixed Link. III Fabre Conference: Existing Bridges, Viaducts, and Tunnels: Research, Innovation, and Applications Risk, life cycle cost and environmental impact analysis for service life extension Sebastian Thöns a *, Ivar Björnsson a , Bengt Hergart b , a Division of Structural Engineering, Lund University, Sweden b Øresundsbro Konsortiet, Denmark and Sweden

* Corresponding author. E-mail address: sebastian.thons@kstr.lth.se

2452-3216 © 2026 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 the scientific committee of the Conference 10.1016/j.prostr.2026.06.167