Scour Program Management
Authors: Paul Clopper (Ayres Associates) , P. F. Lagasse , L. W. Zevenbergen
NCHRP Project 24-34 was completed in September 2013 with the publication of NCHRP Report 761, "Reference Guide for Applying Risk and Reliability-Based Approaches for Bridge Scour Prediction." The project accomplished its objectives of developing risk/reliability-based methodologies that can be used in calculating bridge pier, abutment, contraction, and total scour at waterway crossings so that scour estimates can be linked to a probability. The developed probabilistic procedures are consistent with LRFD approaches for bridge design used by structural and geotechnical engineers.
As a necessary first step in developing the statistical parameters for risk and reliability analyses, the key bridge scour equations (HEC-18 pier scour, Florida DOT pier scour, HEC-18 contraction scour, and NCHRP 24-20 abutment scour) were tested against available laboratory and field data sets. The results which are summarized in this presentation include:
This presentation will be followed by Part II which will provide an example application of the basic risk-based methodology in a typical design situation.
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How to Cite: Clopper, P. , Lagasse, P. F. & Zevenbergen, L. W. (2014) “Risk-Based Approach for Bridge Scour Prediction: Applications for Design”, National Hydraulic Engineering Conference 2014. 1(2014).