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Hydrodynamic effects of debris blockage and scour on masonry bridges: Towards experimental modelling

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2016
Authors
Ebrahimi, Mohsen
Kripakaran, Prakash
Đorđević, Slobodan
Tabor, Gavin
Kahraman, Recep
Prodanović, Dušan
Arthur, Scott
Conference object (Published version)
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Abstract
This paper describes the preliminary stage of an ongoing project investigating the hydrodynamic effects of debris blockage at masonry bridges. Debris blockage is cited as one of the primary causes of bridge failures in the UK and around the world. Masonry bridges, many of which are valuable historical assets, are particularly vulnerable to debris blockage due to their short spans and low clearance. This paper presents work done as part of the first phase of the project involving experimental research to understand the scientific relationships between debris characteristics and flow conditions. The study, being carried out at Centre for Water Systems at University of Exeter, utilizes a 0.6 m-wide and 10 m-long flume to run hydraulic experiments in order to characterize the impact of debris blockage on flow hydrodynamics, scour, and hydrodynamic pressures and forces at masonry bridges. This paper outlines the design of the experimental setup and the reasoning behind the choices for preli...minary experimental parameters. The experiments are to include testing of bridge models and various 3D-printed debris shapes under realistic flow conditions. Geometry of the bridge and debris models are kept approximately similar to prototype conditions, with hydraulic conditions of the experiments designed to the degree that experimental constraints allow based on Froude similarity. Velocities, scour and hydrodynamic pressures are measured using an Acoustic Doppler Velocimeter, echo-sounding concept and pressure sensors, respectively. Preliminary results indicate that the designed experiments have the potential to enhance our understanding of the hydrodynamic effects of debris blockage.

Source:
Scour and Erosion - Proceedings of the 8th International Conference on Scour and Erosion, ICSE 2016, 2016, 743-750
Publisher:
  • CRC Press/Balkema
Projects:
  • United Kingdom's Engineering and Physical Sciences Research Council (EPSRC) EP/M017354/1
Scopus: 2-s2.0-85018586631
[ Google Scholar ]
2
URI
http://grafar.grf.bg.ac.rs/handle/123456789/735
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  • Radovi istraživača / Researcher's publications
  • Катедра за хидротехнику и водно-еколошко инжењерство
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