Assessment of an instrumented reinforced-concrete bridge with fiber-reinforced-polymer strengthening

Steve E. Watkins; James W. Fonda; Antonio Nanni

doi:10.1117/1.2740758

1 May 2007 Assessment of an instrumented reinforced-concrete bridge with fiber-reinforced-polymer strengthening

Steve E. Watkins, James W. Fonda, Antonio Nanni

Author Affiliations +

Optical Engineering, Vol. 46, Issue 5, 051010 (May 2007). https://doi.org/10.1117/1.2740758

Abstract

Field instrumentation is investigated on an in-service highway bridge over a 2-year period. Extrinsic Fabry-Pérot interferometric (EFPI) strain sensors provide a permanent health-monitoring capability. The bridge is a reinforced-concrete (RC) structure that was repaired and strengthened using fiber-reinforced-polymer (FRP) wraps. A sensor network monitors the load-induced strain in the FRP reinforcement and the steel rebar. Colocated electrical resistance strain gauges and a finite element analysis are used for comparison. Both dynamic and static load characteristics are analyzed for a near-capacity truck. The fiber optic measurements are generally consistent with the comparison measurements and the analytical results; and they show no failure or degradation as opposed to the electrical resistance gauges. We demonstrate the implementation and the performance of in situ EFPI sensors in a long-term field environment. Embedded fiber optic sensors can provide the required information for the intelligent management of a transportation infrastructure.

©(2007) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Steve E. Watkins, James W. Fonda, and Antonio Nanni "Assessment of an instrumented reinforced-concrete bridge with fiber-reinforced-polymer strengthening," Optical Engineering 46(5), 051010 (1 May 2007). https://doi.org/10.1117/1.2740758

Published: 1 May 2007

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