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Evaluation and Surveillance of Concrete Bridge Structures

by T. R. Overman, Construction Technology Lab Inc, Skokie, IL, USA,
K. N. Shiu, Construction Technology Lab Inc, Skokie, IL, USA,
T. L. Weinmann, Construction Technology Lab Inc, Skokie, IL, USA,
B. J. Morgan, Construction Technology Lab Inc, Skokie, IL, USA,
D. M. Schultz, Construction Technology Lab Inc, Skokie, IL, USA,



Document Type: Proceeding Paper

Part of: Bridges and Transmission Line Structures

Abstract:

A number of cost-effective techniques are available for evaluation and surveillance of concrete bridge structures. The methods covered in this paper include: long-term bridge instrumentation, load testing, direct stress measurement, and modal analysis. Long-term bridge instrumentation utilizes gages installed during construction and monitored for the life of the structure. Load testing can utilize long-term instrumentation, but in general, the gages are installed after construction to determine behavior of specific elements. The purpose of these gages is to verify design details, monitor construction quality, or to provide data for refined load rating analyses. The direct stress measurement technique is used at any stage in the life of a bridge. Modal analysis determines mode shapes of concrete bridge structures. In addition, primary frequencies of each shape are obtained.

Subject Headings: Concrete bridges | Bridge tests | Load tests | Infrastructure construction | Stress analysis | Load factors | Instrumentation

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