PSI - Issue 44

Fabrizio Paolacci et al. / Procedia Structural Integrity 44 (2023) 697–704 Fabrizio Paolacci et al. / Structural Integrity Procedia 00 (2022) 000–000

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WP 2 aim respectively to develop a procedure for Level 1 analysis by inspecting bridge and viaduct in order to identify their defect levels. Following the suggestion provided by the defect schedules contained in the Italian guidelines, it will be possible to integrate the latter with the peculiarities of regional bridges and integrate the information contained in database, GIS tool and BIM model. WP3 and WP4 aim to develop, respectively, a qualitative and a quantitative risk analysis of the bridges for both static and seismic load. The former (WP3) aims to create a procedure for the classification of bridges and viaducts on a territorial scale through the expeditious estimation of the risk factor, represented by the class of attention, as defined by the MIT Guidelines. WP4, instead, involves the use of simple numerical models and simplified analyses in order to evaluate a quantitative risk factor in order to estimate a rank of critical bridges. The objective of WP5 is to validate the procedures developed in WP3 and WP4, through the application to case studies. In order to integrate the geometric, material, and defect status information from the previous WPs, innovative techniques for surveying and monitoring case studies are applied, thus gaining an higher level of detail. Furthermore, refined Finite Element Models (FEM) models will be used in order to make an accurate assessment of the safety of the infrastructure against vertical and seismic loads. Finally, WP6 aims to design the mitigation system for the most critical infrastructures and the health monitoring system by means of traditional sensors and innovative sensors such as satellite monitoring (D’Amico et al 2020, Bianchini Ciampoli et al 2020, Costin et al 2018). The framework of the project with all the activities is resumed in Fig. 1.

Fig. 1. Framework of MLAZIO project.

At present, the project has focused on the first four WPs, so those related to levels 0-to-3. The progress of the project is described in sections §3 and §4. In particular, section §3 synthetically illustrates the activities carried out in the first phase of the project for levels 0,1 and 2, whereas section §4 is dedicated to the description of level 3, focused on the quantitative seismic risk assessment, and its application to a case study. 3. Status of the project progress: levels 0-to-2 As highlighted in §2, a description of the current progress of WPs 1-to-3, corresponding to levels 0, 1 and 2, is presented in this section. Level 0 was devoted to the census of all bridges in Lazio Region, each of which is identified by its own MLAZIO Code (equivalent to IOP code used within the Italian Public Works Computer Archive - AINOP), and associated with a set of information needed to evaluate the safety of the structure. In order to manage all this information, it was necessary to design a relational database (Codd E.F. 1970). A Geographic Information System (GIS) catalog was derived from database to georeferenced data, whose visualization is realized through Quantum GIS (QGIS) and