The I-35W St. Anthony Falls bridge was highly instrumented with over 500 sensors to verify design assumptions; serve as a testbed to examine bridge sensing techniques; and evaluate the effectiveness of different bridge monitoring strategies. The instrumentation deployed on the bridge to investigate the structural behavior included vibrating wire strain gages (VWSGs); thermistors; fiber optic sensors (SOFO); resistance strain gages; linear potentiometers; accelerometers; and corrosion monitoring sensors. This report documented the successes and challenges of the monitoring program over the first ten years of the bridge's life. In particular; the effectiveness of different strain measurement techniques and sensor distributions were addressed. Previous investigations of temperature-dependent and time-dependent behavior were also expanded with the larger data set to better understand the behavior of post-tensioned concrete box girder structures with the potential to impact future designs.
