Clear-water scour evolution at dual bridge piers


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Yilmaz M., Yanmaz A. M. , Köken M.

CANADIAN JOURNAL OF CIVIL ENGINEERING, vol.44, pp.298-307, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 44
  • Publication Date: 2017
  • Doi Number: 10.1139/cjce-2016-0053
  • Journal Name: CANADIAN JOURNAL OF CIVIL ENGINEERING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.298-307
  • Keywords: bridge, pier group, clear-water scour, sediment pickup, DEPENDENT LOCAL SCOUR, TEMPORAL VARIATION, TIME EVOLUTION, PILE GROUPS, ABUTMENTS, DEPTH, MODEL, EQUILIBRIUM, CYLINDERS, SCALE
  • Middle East Technical University Affiliated: Yes

Abstract

For the efficient design of bridge pier footings, computation of time-evolution of scour depth around bridge piers is essential. In this paper, a semi-empirical model is developed to estimate the temporal variation of clear-water scour depth at a couple of identical cylindrical uniform piers in tandem arrangement. The experiments are carried out using different pier size, pier spacing, and flow intensities. The model development is based on sediment continuity approach and volumetric sediment transport rate from the scour hole using a sediment pickup function. The model results are presented as design charts giving the relation between dimensionless scour depth and time for practical use. Results of the proposed model are in relatively good agreement with the experimental results, in the tested range.