PSI - Issue 64

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

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1. Introduction The aging of structures and infrastructures is a global concern, particularly prominent in countries like Italy, where historical and architectural treasures coexist with modern infrastructure demands. As infrastructure ages, ensuring its safety and maintaining its performance become paramount challenges, especially when confronted with limited budgets for repair and maintenance. This necessitates the development and implementation of prioritization methodologies to allocate resources effectively. In recent decades, the field of SHM has emerged as a cornerstone of infrastructure management, offering a proactive framework for assessing the structural integrity of bridges, buildings, and other critical assets (Frangopol et al., 2012; Rizzo and Enshaeian, 2021). Central to SHM is the utilization of advanced sensor technologies, data analytics, and machine learning algorithms to monitor structural behavior in real-time, enabling early detection of anomalies and informed decision making regarding maintenance and repair strategies (Ye et al., 2019). Furthermore, advancements in sensor technology have led to the development of multifunctional sensor systems capable of monitoring various structural parameters, including strain, displacement, temperature, and corrosion (Farhey, 2005). Numerous studies have underscored the efficacy of SHM in enhancing the resilience and longevity of aging infrastructure (Mehdi and Natalie, 2013). For instance, the work of (He et al., 2022) exemplifies the use of SHM technique and data analytics to define location and significance of structural damages to ensure the functionality of bridges under operational condition. Similarly, the research conducted by (Tecchio et al., 2017) shows as SHM is a fundamental part of the process for effectively evaluate residual life and the real urgency of retrofitting interventions. This paper presents a detailed examination of the activities conducted on the "Ponte Nuovo del Popolo" bridge, focusing on its deterioration assessment, structural verification process, and the role of SHM in guiding restoration efforts. The SHM system, installed in 2012 following structural assessments, remained operational until 2022, providing invaluable data for decision-making during the restoration works initiated in 2021. Through this case study, we aim to offer a comprehensive understanding of the challenges posed by aging infrastructure, the methodologies employed to ensure safety and performance, and the significance of SHM in enhancing the management of bridges and similar structures.

2. Ponte Nuovo del Popolo 2.1. Bridge Characteristics

“Ponte Nuovo del Popolo” bridge is located in the city center of Verona, on the Adige River (Fig. 1). It is a three span reinforced concrete bridge with variable-height beams, with a total length of 90.5 meters. As for the three spans, the central one has a span of 33.4 meters, while the two side arches have a span of 25.2 meters. The overall width of the deck is 14.3 meters. The static scheme consists of seven main girders, placed longitudinally along the entire length of the bridge, and eleven stiffening beams, which connect all the main girders in the transverse direction. The top of the RC deck slab has a thickness of 18 cm. The roadway originally provided 3 lanes of alternating vehicle traffic. The critical situation revealed by the investigations forced the reduction of traffic loads, resulting in a restriction to two lanes (one in each direction) and the introduction of two side bike lanes.