PSI - Issue 62

ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 62 (2024) 815–823

2452-3216 © 2024 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 Scientific Board Members 10.1016/j.prostr.2024.09.110 2452-3216 © 2024 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 Scientific Board Member s 1. Introduction After the 2018 collapse of the Morandi highway bridge in Genova, in which 43 fatalities were recorded, the Italian Ministry of Infrastructures and Transports issued a new guideline (MIT-GL) for the regulation of the maintenance, inspection, monitoring and risk assessment of existing road bridges (MIT 2020). The MIT-GL proposes a multilevel approach for the identification of the priority of interventions among a stock of existing bridges by first assessing a qualitative risk rating based on the collection of census data (Level 0) and condition state evidences coming from the visual inspections (Level 1). Such qualitative risk assessment (Level 2) is carried out with the use of flow-charts and tabular indexes, providing a fast assessment of the level of risk with respect to traffic load actions, and natural hazards like earthquakes, flooding and landslide scenarios. The resulting risk rating is expressed with in judgment scale where five different outcomes can be obtained, namely High, Medium-High, Medium, Medium-Low and Low risk rating. 2452-3216 © 2024 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 Scientific Board Member s 1. Introduction After the 2018 collapse of the Morandi highway bridge in Genova, in which 43 fatalities were recorded, the Italian Ministry of Infrastructures and Transports issued a new guideline (MIT-GL) for the regulation of the maintenance, inspection, monitoring and risk assessment of existing road bridges (MIT 2020). The MIT-GL proposes a multilevel approach for the identification of the priority of interventions among a stock of existing bridges by first assessing a qualitative risk rating based on the collection of census data (Level 0) and condition state evidences coming from the visual inspections (Level 1). Such qualitative risk assessment (Level 2) is carried out with the use of flow-charts and tabular indexes, providing a fast assessment of the level of risk with respect to traffic load actions, and natural hazards like earthquakes, flooding and landslide scenarios. The resulting risk rating is expressed with in judgment scale where five different outcomes can be obtained, namely High, Medium-High, Medium, Medium-Low and Low risk rating. II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Structural demand assessment of exceptional road transport actions on existing Italian simply-supported girder bridge decks Mariano Angelo Zanini a , Buso Federico a , Flora Faleschini a , Carlo Pellegrino a a Department of Civil, Environmental and Architectural Engineering, University of Padova, Padova, Italy Abstract In the present work an in-depth analysis of the structural demand induced by several configurations of exceptional road transports has been carried out with the aim to quantify bending moment and shear demands over different geometrical layouts of simply supported girder bridge decks and compare them with those deriving by the application of the traffic load models in force at the time of the design. On such bases, a structural demand coefficient has been computed in analogy to the Level 3 assessment suggested by the new Italian Guidelines for assessing the Risk of existing bridges. In this way, this structural demand index can be easily used by infrastructure owners for a fast assessment of the effects of exceptional road transport configurations potentially travelling over a bridge on its structural elements, if compared to the load models originally considered for its design, thus making possible a preliminary screening on the transitability of the infrastructure and the identification of potential road network bottlenecks. II Fabre Conference – Existing bridges, viaducts and tunnels: research, innovation and applications (FABRE24) Structural demand assessment of exceptional road transport actions on existing Italian simply-supported girder bridge decks Mariano Angelo Zanini a , Buso Federico a , Flora Faleschini a , Carlo Pellegrino a a Department of Civil, Environmental and Architectural Engineering, University of Padova, Padova, Italy Abstract In the present work an in-depth analysis of the structural demand induced by several configurations of exceptional road transports has been carried out with the aim to quantify bending moment and shear demands over different geometrical layouts of simply supported girder bridge decks and compare them with those deriving by the application of the traffic load models in force at the time of the design. On such bases, a structural demand coefficient has been computed in analogy to the Level 3 assessment suggested by the new Italian Guidelines for assessing the Risk of existing bridges. In this way, this structural demand index can be easily used by infrastructure owners for a fast assessment of the effects of exceptional road transport configurations potentially travelling over a bridge on its structural elements, if compared to the load models originally considered for its design, thus making possible a preliminary screening on the transitability of the infrastructure and the identification of potential road network bottlenecks. © 2024 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 Scientific Board Members Keywords: bridges; exceptional road transports; traffic load models; prioritization; BMS. Keywords: bridges; exceptional road transports; traffic load models; prioritization; BMS.