桥面性能监测
Near the small town of Saco, Montana three bridges wereconstructed less than one mile apart along the same highwaycorridor, Montana State Route 243. Because of their proximity toeach other, each bridge experiences essentially identical demandsfrom weather, traffic, and winter maintenance. To assess bridgedeck performance, each of the bridges were instrumented then eachbridge was fitted with a different type of reinforced concretedeck.
The instrumentation is primarily concentrated in a singledriving lane of one 15 m span on each of the three bridges. Straingages were placed in each bridge deck prior to casting theconcrete. Three different strain gage technologies were used ineach bridge: 35 Vishay foil strain gages bonded to reinforcingsteel, 7 Vishay embedment-type strain gages suspended in concreteand 16 Geokon vibrating wire strain gages suspended in concrete.