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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT : Effect of Bridge Abutment-Collar Arrangement on the Location of the Maximum Scour Depth
Effect of Bridge Abutment-Collar Arrangement on the Location of the Maximum Scour Depth
Author : Serife Yurdagul Kumcu, Mustafa Gogus and Mehmet Ali Kokpinar
The growth of principal vortex can be arrested by forming a rigid surface around the abutment with a collar. Although experimental studies showed that the scour holes formed at the upstream side of the abutment, if collars were used it was observed that the maximum scour depth was routed to the downstream of the abutment. In this study, a series of experiments were carried out for the abutment lengths are L =15 cm, 20 cm and 25 cm. For each case a collar plate was placed at the vertical location of a =-5 cm on the abutment. As the experiments were conducted with collars, it was observed that due to Z c the presence of the collars other scour holes developed at far downstream of the abutments. However, the maximum depths of these scour holes were smaller than those observed at the faces of the abutments when they were tested without collars. To describe the location of these maximum scour depths, the angle o o o o o o ? is defined. ? varies between 20.40 -27.30 ; 28.10 -32.50 and 32.8 -44.10 for the abutment lengths of L =15 cm, 20 cm and 25 cm, respectively. Although these scour depths are higher than those recorded at a the abutment face when it has a collar around it, they are still lower than the maximum scour depths, which are obtained from without-collar cases.
File Size : 310,830 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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