Abstract
Bridge failures are not uncommon during floods. Therefore, the assessment of bridge vulnerability is crucial to help a bridge’s administration take the best decisions during emergencies (i.e. closing the bridge). The first step to achieve this is to implement a monitoring system providing needed information to develop scenarios based on administration response time. The proposed system seeks a real-time evaluation of the loads acting on the bridge. Wind and water contributions, debris accumulation upstream of piers and river bed level are evaluated by specific devices. The most difficult measurement is the identification of the riverbed position in close proximity to piers. Scour model predictions are still far from robust and accurate and no standard devices are available to measure it. Unfortunately, the main reason for bridge failure is scour around bridge piers, called local scour. A monitoring system was developed for this purpose and installed on a critical bridge over the river Po in Italy, as a result of the cooperation between the Politecnico di Milano and the Province of Mantova. The aim was to measure the main parameters for a proper evaluation of the bridge’s vulnerability. The paper’s focus is twofold: to show long-term data and all the phases needed to assess bridge safety. The first aspect, not so common in the literature, is useful to understand the temporal evolution of the environment around the bridge. The second one provides a roadmap for risk assessment and management decisions relying on the widely available database. With regard to this second topic, another paper describing the overall strategy has already been published. The main focus here is on potential implementation, with an emphasis on the available data.
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References
Arneson LA, Zevenbergen LW, Lagasse PF, Clopper PE (2012) Evaluating scour at bridges. Publication No. FHWA-HIF-12-003-HEC18, Hydraulic Engineering Circular No. 18, 5th edn. Federal Highway Administration, Washington
Ballio F, Teruzzi A, Radice A (2009) Constriction effects in clear-water scour at abutments. J Hydraul Eng 135(2):140–145
Ballio F, Ballio G, Franzetti S, Crotti G, Solari G (2018) Actions monitoring as an alternative to structural rehabilitation: case study of a river bridge. Struct Control Health Monit 2018:e2250. https://doi.org/10.1002/stc.2250
Banks JC, Camp JV, Abkowitz MD (2016) A screening method for bridge scour estimation and flood adaptation planning utilizing HAZUS-MH 2.1 and HEC-18. Nat Hazards 83(3):1731–1741. https://doi.org/10.1007/s11069-016-2390-1
Briaud JL (2015) Scour depth at bridges: method including soil properties. I: Maximum scour depth prediction. J Geotech Geoenviron Eng 141(2):04014104. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001222 (Article Number: 04014104)
Chen W, Yu X, Liang F (2017) A review of bridge scour: mechanism, estimation, monitoring and countermeasures. Nat Hazards 87:1881. https://doi.org/10.1007/s11069-017-2842-2
Cheng MY, Wu YW (2013) Multi-agent-based data exchange platform for bridge disaster prevention: a case study in Taiwan. Nat Hazards 69:311–326. https://doi.org/10.1007/s11069-013-0708-9
Cigada A, Ballio F, Inzoli F (2008) Hydraulic Monitoring Unit, application for international patent no. PCT/EP2008/059075
Crotti G, Ballio F, Manzoni S, Inzoli F, Cigada A, Rossi G (2012) Real-time assessment of bridge vulnerability. In: 6th International Conference on Scour and Erosion (ICSE-6), Paris, 27–31 August 2012
Crotti G, Isidori D, Cigada A, Ballio F, Inzoli F, Concettoni E, Cristalli C (2016) A hydraulic monitoring system on a bridge over the River Esino, Italy. J Civ Struct Health Monit 6(3):377–384. https://doi.org/10.1007/s13349-016-0179-2
ESDU-82026 (1993) Strong winds in the atmospheric boundary layer, part 1: hourly-mean wind speeds. ESDU International, London
Farooq M, Banthia N and Azhari F (2017) Bridge scour monitoring: challenges and opportunities. In: 39th International Association for Bridge and Structural Engineering (IABSE), Vancouver, 21–23 September 2017
Federal Highway Administration FHWA (2009) Bridge scour and stream instability countermeasures: experience, selection, and design guidance, 3rd edn. Publication No. FHWA-NHI-09-111-HEC23, Hydraulic Engineering Circular No. 23
Franzetti S, Radice A, Rabitti M, Rossi G (2011) Hydraulic design and preliminary performance evaluation of countermeasure against debris accumulation and resulting local pier scour on river Po in Italy. J Hydraul Eng 137(5):615–620
Hill KO, Meltz G (1997) Fiber Bragg grating technology fundamentals and overview. J Lightwave Technol 15(8):1263–1276
Johnson PA, Sheeder SA (2011) Controlling debris at bridges. In: Andrew S et al (eds) Stream restoration in dynamic fluvial systems: scientific approaches, analyses and tools. Wiley, New York, pp 385–397
Johnson PA, Clopper PE, Zevenbergen LW, Lagasse PF (2015) Quantifying uncertainty and reliability in bridge scour estimations. J Hydraul Eng 141:04015013. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001017
Lamb R, Aspinall W, Odbert H, Wagener T (2017) Vulnerability of bridges to scour: insights from an international expert elicitation workshop. Nat Hazards Earth Syst Sci 17(8):1393–1409
Manzoni S, Crotti G, Ballio F, Cigada A, Inzoli F, Colombo E (2011) Bless: a fiber optic sedimeter. Flow Meas Instrument. https://doi.org/10.1016/j.flowmeasinst.2011.06.010
Mazzorana B, Hübl J, Zischg A et al (2011) Modelling woody material transport and deposition in Alpine rivers. Nat Hazards 56:425–449. https://doi.org/10.1007/s11069-009-9492-y
Melville BW, Coleman SE (2000) Bridge scour. Water Resources Publications, LLC, Highlands Ranch
National Cooperative Highway Research Program NCHRP (2009) Synthesis 396: Monitoring Scour Critical Bridges Project Number: 20-05/Topic 36-02 https://doi.org/10.17226/22979
Provincia di Mantova (2008), Studio della vulnerabilità idraulica ponte di Borgoforte sul fiume Po
Radice A, Lauva O (2017) Live-bed pier scour in a covered flow. J Hydraul Eng 143(10):06017016. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001359
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Crotti, G., Cigada, A. Scour at river bridge piers: real-time vulnerability assessment through the continuous monitoring of a bridge over the river Po, Italy. J Civil Struct Health Monit 9, 513–528 (2019). https://doi.org/10.1007/s13349-019-00348-5
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DOI: https://doi.org/10.1007/s13349-019-00348-5