Instrumentation, Monitoring, and Modeling of the I-35W Bridge

Status:  Complete
Report Date:  08/31/2012

Summary:

Researchers investigated the structural behavior of the I-35W St. Anthony Falls Bridge in response to traffic loads and temperature changes, using data from more than 500 sensors installed during construction. Results showed that the bridge behaved as expected during its first three years, and computer models accurately predicted its measured responses. Researchers also used this data to evaluate assumptions from the bridge's Load Rating Manual, and ultimately it will help them to better understand the structural behavior of post-tensioned concrete box girder structures in general.

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