PSI - Issue 84

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ScienceDirect

Procedia Structural Integrity 84 (2026) 975–982

© 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) Abstract The lifecycle management of existing reinforced concrete and prestressed concrete bridges and viaducts faces the dual challenge of implementing durable strengthening interventions while, at the same time, equipping the structures with real-time monitoring systems for a continuous assessment of their condition. Methodologies based on Artificial Intelligence (AI), essential for predictive maintenance, are however dependent on a continuous and reliable data stream, which is difficult to obtain with retrofitted sensing systems. This paper presents the CAM-Bridge ® technology, an external post-tensioning solution that provides an integrated response to these needs. The system uses duplex and stainless steels with very high corrosion resistance, ensuring exceptional durability. The layout of the ties replicates the static efficiency of original prestressing systems with draped tendons, while their flat, tape-like cross-section facilitates the non-invasive integration of sensors. Furthermore, this architecture allows for effective tuning over time, thanks to the use of the T-CAM ® system as the integrated tensioning and locking element for the ties. This provides the ability to verify and, if necessary, recalibrate the post-tensioning state for active performance control throughout the entire service life. The innovation lies in the synergy between strengthening and monitoring: the native integration of wireless strain gauges transforms the intervention from a passive element into an active and "intelligent" system. The strain data, acquired in real-time, provide the ideal input for AI algorithms, enabling advanced Structural Health Monitoring (SHM) and the transition towards a predictive strategy. The solution stands as a concrete step towards safer and more resilient infrastructures, optimizing long-term management costs. III Fabre Conference: Existing Bridges, Viaducts, and Tunnels: Research, Innovation, and Applications CAM-Bridge ® : a Tunable and Durable Post-Tensioning System with Integrated Health Monitoring Alessandro Vari a, *, Donato Abruzzese b a EdilCAM Sistemi Srl, Via dei Genieri 39, 00143, Rome b Dept. of Civil Eng.& Computer Sciences, Univ. Rome «Tor Vergata», Via del Politecnico 1, 00133, Rome

Peer-review under responsibility of the scientific committee of the Conference Keywords: retrofitting, bridge, post-tensioning, SHM, CAM-Bridge ® , T-CAM ® .

* Corresponding author. E-mail address: a.vari@edilcamsistemi.com

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.2026.06.125