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Mapping of bridge pier scour with projection Moiré

Müller, Gerald, Mach, Rüdiger and Kauppert, Klemens (2001) Mapping of bridge pier scour with projection Moiré Journal of Hydraulic Research, 39, (5), pp. 531-538.

Record type: Article


During the construction works for an extension of an existing bridge pier severe scouring occurred after the placement of a sheet pile cofferdam. A detailed investigation of the situationwas conducted at the Bundesanstalt fürWasserbau (Federal Hydraulic Research Institute) in Karlsruhe, Germany. For the measurement of the scour development without protective layer, an optical measurement method - out-of-plane projection Moiré -was employed in order to investigate its suitability. This technique uses the Moiré effect to map surface contours which are indicated by superposition lines or fringes. The Moiré fringe patterns generated by the measurements were then digitised for further analysis. The contour model revealed that, although the scouring depth did not increase significantly with time after the initial scour had formed, scour size did in fact do so. In addition, the contour model allows to map the scour extension and to determine the maximum deposition height. A 3D model of bridge pier and scour showed, in combination with photographs, the validity of the measurement technique and pointed towards the generation of a virtual environment for the representation of experimental results.

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Published date: 2001


Local EPrints ID: 53405
ISSN: 0022-1686
PURE UUID: 646f649c-3f9f-4c51-8225-58c970c7b975

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Date deposited: 17 Jul 2008
Last modified: 17 Jul 2017 14:38

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Author: Gerald Müller
Author: Rüdiger Mach
Author: Klemens Kauppert

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