Accession Number:

AD1008673

Title:

Infrasound Assessment of Infrastructure Report 6: Scour Detection and Riverine Health Assessment Using Infrasound

Descriptive Note:

Technical Report

Corporate Author:

U.S. Army Engineer Research and Development Center Vicksburg United States

Report Date:

2016-05-01

Pagination or Media Count:

44.0

Abstract:

A previously initiated proof of concept study using infrasound to detect changes in the vibrational modes of a bridge caused by scour was extended to include three-dimensional 3-D models of a shallow foundation case and of a deep foundation case. Comparisons were made between the two-dimensional 2-D and 3-D cases of the shallow foundation, and the results showed that plane-strain conditions represent the lowest frequency fundamental modal changes. As such, a 2-D model of the bridge substructure can be used to realistically simulate progressive scour conditions while reducing the overall computational requirement. Results from the analysis of the deep foundation case proved the potential of the use of infrasound for scour detection for pile foundations. Also included are investigations into the correspondence of the critical depth seen in plots for deep foundations with pile buckling capacity and riverine health assessment using infrasound.

Subject Categories:

  • Civil Engineering
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE