PSI - Issue 44

Francesca Fattorini et al. / Procedia Structural Integrity 44 (2023) 689–696 Fattorini et al./ Structural Integrity Procedia 00 (2022) 000–000

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1. Introduction Most of the Italian heritage of bridges and viaducts is many years old. Without taking into consideration the historical bridges of pre-industrial origin, most of the national bridges and viaducts were built before 1982, with a very high percentage after the II World War. The scenario therefore assumes an intrinsic fragility that must be managed by subjects of different organizational dimensions: from large highway operators to small local authorities. In the past, many Italian road operators planned maintenance of the bridges according to defined deadlines indicated in the ministerial circular no. 6736 / 61A1 (MLP, 1967). The topic of bridge asset management has taken particular relevance in the last part of the 20th Century when the advancements in the knowledge of reinforced concrete behavior made the structural engineering community aware of the fact reinforced concrete and pre-stressed structures designed and built in the 1960’s were unlikely to last the 100 years they had been designed to. Worldwide Bridge Management System (BMS) research began in USA in 1990s (NCHRP,1987) and in different European countries (Kähkönen et al., 1990, Marshall et al. 1990, Sorensen, 1990, Ingvarsson, 1992). In the following years, there has been a progressive evolution: in 2014 worldwide there were 25 BMS used by 18 countries (Adei et al.,2010, Mirazei et al.,2012, Adei et al.,2014). In Europe the first Bridge Management System was developed in the early 2000s in the BRIME project. BRIME’s main purposes were to create a unique standard for the European area and monitoring the most important bridges (Woodward et al, 2001). In the following years, the COST Action TU 1406 also allowed the development of new approaches to quantify the performance of bridges, as well as the improvement of management strategies for aging structures (Matos et al, 2019). With the issue of the Italian Bridges Guidelines (MIMS,2020) a new multilevel approach was introduced which also allows the development of a BMS (Manarin et al., 2022). The Bridge Guidelines are not currently mandatory for local authorities, which, like the provinces of Trento and Bolzano, have independently developed BMS systems (Bortot et al.,2006, Zonta et al. 2007, Yue,2013). Anyway, in order to ensure homogeneity of classification, risk management and safety assessment throughout the Italian road infrastructure landscape, the progressive application of the bridge guidelines to all local authorities is deemed necessary. In this regard, numerous experiences have been successfully carried out at local level which have shown numerous advantages in applying the new Bridge Guidelines (De Matteis et al., 2022, Buratti et al., 2022a, Buratti et al. 2022b Santarsiero, 2021). For these reasons, in this work the BMS of the Municipality of Rome will be illustrated and a benchmark between other road operators will be carried out to examine similarities and differences. Finally a gap-analysis will be carried out for the evaluation of the transition to the new Bridge Guidelines.

Nomenclature BMS

Bridge Management System Bridge Management in Europe

BRIME

Bridge Guidelines

Italian guidelines for classification, safety assessment and monitoring of existing bridges

NTC

Italian Technical Standards for Constructions

AINOP

IT Archive of Public Work Safety Management System Ministry of Public Works

SMS MLP

MIMS STAR

Ministry of Infrastructure and Sustainable Mobility Signalling and Tracking of Anomalies on the streets of Rome

2. The infrastructure management system of the city of Rome The Municipality of Rome is a complex and territorially fragmented reality which, however, is virtuous from the point of view of the monitoring and surveillance of its works, having already equipped itself with a proprietary system for the verification of defects and critical conditions of the roadworks. The Municipality of Rome has entrusted the tasks of surveillance and monitoring of the roadworks to an external service provider and the Department of Infrastructure Development and Urban Maintenance has started to register the number of roadworks, which are 476.