Instrumentation System Performance for Long-term Bridge Health Monitoring

The instrumented long-term continuous health-monitoring system installed on the Tech 21 Bridge during its fabrication is used to evaluate the performance of the instrumentation system itself. The bridge has been continuously monitored for nearly four years to demonstrate its performance. Field monitored results are studied to evaluate the behavior and durability of the bridge structure, components, and material. This evaluation is also studied to determine the level of long-term performance of the instrumented monitoring system in the harsh infrastructure environment. The measured readings of the bridge include the hidden additive of the system’s performance. In addition to the structural behavior, results measured also demonstrate the ambient effects on the system. Time, temperature, and humidity dependence of the system are recorded and characterized.