PSI - Issue 64

Amedeo Caprino et al. / Procedia Structural Integrity 64 (2024) 2149–2156 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

2156

8

• Protecting the structure from degrading agents by waterproofing the deck, restoring drains, painting the structure at the soffit of the structure and • Cleaning, restoration, or punctual remaking of the stone elements. 5. Conclusion The aging of structures and infrastructures in Italy emphasizes the importance of procedures for assessing their safety and life cycle performance. Frequently, costs associated with repair and maintenance activities required for all infrastructures exceed the available budget of management bodies. It is consequently vital to establish and implement prioritization strategies. Within this paradigm, Structural Health Monitoring (SHM) is increasingly regarded as an important method for improving our understanding of the structural behavior of existing bridges. In this paper, the case study of “Ponte Nuovo del Popolo” in Verona is an example of how structural monitoring can be a fundamentally important tool for both infrastructure management and maintenance and for the design and prioritization of repair interventions. The bridge presented an advanced damage pattern, with the main load-bearing elements irreparably compromised. In fact, from the structural check carried out, it was clear that the main beams do not meet the safety requirements established by current regulations. For this reason, repair and restoration work on the structure was necessary. To guide the planning of interventions and evaluate the evolution of the damage state during the various phases, a static and dynamic monitoring system was installed. The analysis of the data produced highlighted how during the observation period there was no significant worsening of the damage conditions with consequent further loss of resistance of the elements. Finally, the repair works were definitively designed at the end of 2020 and began around mid-2021. As of June 2024, the repair work is still in progress while the monitoring system has been temporarily removed. Once the work is completed, the installation of a new monitoring system will be re-evaluated to assess the effectiveness of the work performed. Acknowledgement The work has been partially carried out as part of the activities envisaged by the Agreement between the High Council of Public Works (CSLLPP) and the ReLUIS Consortium implementing Ministerial Decree 578/2020. References Clark, T., Woodley, R., De Halas, D., 1962. Gas-Graphite Systems, in “Nuclear Graphite”. In: Nightingale, R. (Ed.). Academic Press, New York, pp. 387. Deal, B., Grove, A., 1965. General Relationship for the Thermal Oxidation of Silicon. Journal of Applied Physics 36, 37 – 70. Deep - Burn Project: Annual Report for 2009, Idaho National Laboratory, Sept. 2009. Fachinger, J., den Exter, M., Grambow, B., Holgerson, S., Landesmann, C., Titov, M., Podruhzina, T., 2004. Behavior of spent HTR fuel elements in aquatic phases of repository host rock formations, 2nd International Topical Meeting on High Temperature Reactor Technology. Beijing, China, paper #B08. Fachinger, J., 2006. Behavior of HTR Fuel Elements in Aquatic Phases of Repository Host Rock Formations. Nuclear Engineering & Design 236, 54. Farhey, D.N., 2005. Bridge Instrumentation and Monitoring for Structural Diagnostics. Struct. Health Monit. 4, 301 – 318. https://doi.org/10.1177/1475921705057966 Frangopol, D.M., Saydam, D., Kim, S., 2012. Maintenance, management, life-cycle design and performance of structures and infrastructures: a brief review. Struct. Infrastruct. Eng. 8, 1 – 25. https://doi.org/10.1080/15732479.2011.628962 He, Z., Li, W., Salehi, H., Zhang, H., Zhou, H., Jiao, P., 2022. Integrated structural health monitoring in bridge engineering. Autom. Constr. 136, 104168. https://doi.org/10.1016/j.autcon.2022.104168 Mehdi, M., Natalie, W., 2013. Overview of Structural Health Monitoring for Steel Bridges. Pract. Period. Struct. Des. Constr. 18, 187 – 191. https://doi.org/10.1061/(ASCE)SC.1943-5576.0000154 NTC2008 Norme Tecniche per le Costruzioni, 2008. . Official Gazette of the Italian Republic, Rome, Italy. Rizzo, P., Enshaeian, A., 2021. Challenges in Bridge Health Monitoring: A Review. Sensors 21. https://doi.org/10.3390/s21134336 Tecchio, G., Lorenzoni, F., Caldon, M., Donà, M., da Porto, F., Modena, C., 2017. Monitoring of orthotropic steel decks for experimental evaluation of residual fatigue life. J. Civ. Struct. Health Monit. 7, 517 – 539. https://doi.org/10.1007/s13349-017-0240-9 Ye, C., Butler, L., Calka, B., Iangurazov, M., Lu, Q., Gregory, A., Girolami, M., Middleton, C., 2019. A Digital Twin of Bridges for Structural Health Monitoring, in: Structural Health Monitoring 2023: Designing SHM for Sustainability, Maintainability, and Reliability - Proceedings of the 14th International Workshop on Structural Health Monitoring. https://doi.org/10.12783/shm2019/32287