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Proceedings Paper

Initial test results from FHWA project Dynamic Bridge Substructure Evaluation and Monitoring System
Author(s): Marwan F. Aouad; Larry D. Olson; Ming Liu
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Paper Abstract

The FHWA project 'Dynamic Bridge Substructure Evaluation and Monitoring System' was conceived to use dynamic characteristics of the bridge substructure to determine the condition of the foundation and to identify the type of the underground substructure (deep or shallow foundation). The determination of the foundation condition will be used to quantify losses in foundation stiffness caused by seismic and scour events. The dynamic characteristics of natural frequencies and mode shapes are extracted from the experimental data and compared with the computer simulation results. The computer simulations are based on a 3-D finite element modeling with Super-Soil-Structural (SSS) elements. The stiffness and mass of these Super-Soil-Structural elements are indicative of the foundation conditions which may be quantified by structural parameter identification techniques. Discussed in this paper are experimental test setups and initial test results for three kinds of foundation conditions at the Trinity River Bridge in Liberty County, Texas.

Paper Details

Date Published: 31 March 1998
PDF: 11 pages
Proc. SPIE 3400, Structural Materials Technology III: An NDT Conference, (31 March 1998); doi: 10.1117/12.300114
Show Author Affiliations
Marwan F. Aouad, Olson Engineering, Inc. (United States)
Larry D. Olson, Olson Engineering, Inc. (United States)
Ming Liu, Olson Engineering, Inc. (United States)

Published in SPIE Proceedings Vol. 3400:
Structural Materials Technology III: An NDT Conference
Ronald D. Medlock; David C. Laffrey, Editor(s)

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