United States Department of Transportation
i
Feasibility of bridge structural health monitoring using short term data acquisition system.
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2015-01-01
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[PDF-5.05 MB]
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Abstract:Long-term testing of bridges can expensive and result in a large amount of data that is difficult to manage and
analyze. The purpose of this study was to investigate the feasibility of a short-term data acquisition system that
used a minimal number of gauges to quantify a bridges behavior. As a result, a system was developed that could
use up to eight sensors and could be utilized in the field for up to two weeks on two marine batteries.
Once the system was developed, it was installed on a bridge near Perry, Utah. This particular bridge had a
permanent data acquisition system installed so a direct comparison could be performed as well as with data that
was recorded during a live-load test. In general, the short-term data acquisition system performed well. It was
determined that two marine batteries did not supply enough power to operate the system for the desired two
week period. Future work will investigate a sleep mode that should conserve additional energy and prolong the
operating life of the system. The measured results were similar to those recorded with the permanently installed
system as well as the live-load data.
While the testing of the system was successful, additional work needs to be performed prior to implementation.
Specifically, the battery issue needs to be resolved to prolong the viable operation time of the system. Additionally,
improvements to the software in terms of post processing and capabilities could be improved to make it more
useful to the user.
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