Initial test results from FHWA project Dynamic Bridge Substructure Evaluation and Monitoring System

Autor:	Ming Liu, Larry D. Olson, Marwan F. Aouad
Rok vydání:	1998
Předmět:	Engineering business.industry Modal analysis System identification Foundation (engineering) Stiffness Structural engineering Finite element method Bridge (nautical) Shallow foundation medicine Substructure medicine.symptom business
Zdroj:	SPIE Proceedings.
ISSN:	0277-786X
DOI:	10.1117/12.300114
Popis:	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.© (1998) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Databáze:	OpenAIRE
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