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Combined Bridge Weigh-In-Motion and Structural Health Monitoring on Road Bridges: Case Study on the Salso Viaduct (Italy)
Road bridges are facing the effects of both their ageing and the increase of the traffic loads, which justifies the necessity of combining Weigh-In-Motion (WIM) with Structural Health Monitoring (SHM) solutions. An operational case study located in southern Italy is described, on which a single Monitoring System achieves both results: to perform Bridge-WIM by using the bridge deck as a scale for the detection and qualification of the traffic load, and to assess the structural health of the asset through combined strain and vibration analysis. The system uses a low number of sensors and is not intrusive for the pavement, making it an efficient and comprehensive solution for the asset manager. The Salso viaduct is a concrete structure with nine simple-supported 32 m long spans, composed of four main prestressed concrete beam girders and a reinforced concrete slab. The system has been installed on two spans with twelve sensors, among them eight optical strand strain gauges and four accelerometers. Two cameras identify the weighed vehicles. Moreover, each truck crossing the bridge triggers strain and vibration records and these data are further analyzed for the SHM of the concrete structure. The performance of the Bridge-WIM system was assessed according to the COST323 specification and the OIML R-134 recommendation. It reached the COST323 accuracy class A(5) and the OIML class 10 for the gross vehicle weights. The OIML class 5 was reached for the fully loaded trucks.
Combined Bridge Weigh-In-Motion and Structural Health Monitoring on Road Bridges: Case Study on the Salso Viaduct (Italy)
Road bridges are facing the effects of both their ageing and the increase of the traffic loads, which justifies the necessity of combining Weigh-In-Motion (WIM) with Structural Health Monitoring (SHM) solutions. An operational case study located in southern Italy is described, on which a single Monitoring System achieves both results: to perform Bridge-WIM by using the bridge deck as a scale for the detection and qualification of the traffic load, and to assess the structural health of the asset through combined strain and vibration analysis. The system uses a low number of sensors and is not intrusive for the pavement, making it an efficient and comprehensive solution for the asset manager. The Salso viaduct is a concrete structure with nine simple-supported 32 m long spans, composed of four main prestressed concrete beam girders and a reinforced concrete slab. The system has been installed on two spans with twelve sensors, among them eight optical strand strain gauges and four accelerometers. Two cameras identify the weighed vehicles. Moreover, each truck crossing the bridge triggers strain and vibration records and these data are further analyzed for the SHM of the concrete structure. The performance of the Bridge-WIM system was assessed according to the COST323 specification and the OIML R-134 recommendation. It reached the COST323 accuracy class A(5) and the OIML class 10 for the gross vehicle weights. The OIML class 5 was reached for the fully loaded trucks.
Combined Bridge Weigh-In-Motion and Structural Health Monitoring on Road Bridges: Case Study on the Salso Viaduct (Italy)
Lecture Notes in Civil Engineering
Rizzo, Piervincenzo (editor) / Milazzo, Alberto (editor) / Cartiaux, François-Baptiste (author) / Fort, Valeria (author) / Pelletier, Patrice M. (author) / Jacob, Bernard (author) / Brouste, Alexandre (author)
European Workshop on Structural Health Monitoring ; 2022 ; Palermo, Italy
2022-06-16
10 pages
Article/Chapter (Book)
Electronic Resource
English
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