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Scour Prediction Model at Bridge Abutments

by G. K. Young, GKY and Associates, Inc, Springfield, United States,
M. Palaviccini, GKY and Associates, Inc, Springfield, United States,
R. T. Kilgore, GKY and Associates, Inc, Springfield, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

A model to predict local abutment scour is presented. The model is based on a large number of laboratory experiments over the past half century. The dependent variable, a ratio that includes local scour depth, is scaled with the contraction scour depth. Independent variate ratios are the approach Froude number, a conveyance ratio and a scaled nonlinear function of depth, width of abutment in the direction of flow and particle size. The model has a low standard error mainly attributed to measurement errors and its predictions need little, if any, safety factor adjustment.

Subject Headings: Bridge abutments | Scour | Errors (statistics) | Mathematical models | Flow measurement | Failure analysis | Structural safety

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