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

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

Research output: Contribution to journalArticle

15 Citations (Scopus)

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 longterm field environment. Embedded fiber optic sensors can provide the required information for the intelligent management of a transportation infrastructure.

Original languageEnglish
Article number051010
JournalOptical Engineering
Volume46
Issue number5
DOIs
StatePublished - May 1 2007
Externally publishedYes

Fingerprint

Acoustic impedance
Concrete bridges
Reinforced concrete
Highway bridges
fibers
Fibers
sensors
Sensors
Fiber optic sensors
polymers
Polymers
Strain gages
electrical resistance
Concrete construction
Fiber optics
Trucks
Sensor networks
Gages
fiber optics
Loads (forces)

Keywords

  • Fiber optic sensors
  • Metrology
  • Nondestructive testing
  • Smart structures
  • Strain analysis

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Assessment of an instrumented reinforced-concrete bridge with fiber-reinforced-polymer strengthening. / Watkins, Steve E.; Fonda, James W.; Nanni, Antonio.

In: Optical Engineering, Vol. 46, No. 5, 051010, 01.05.2007.

Research output: Contribution to journalArticle

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