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Long-Term Performance Evaluation of an FRP Composite Road Bridge Using DFOS Monitoring System.

Maciej Kulpa1, Tomasz Siwowski1, Mateusz Rajchel1

  • 1Department of Road and Bridges, Rzeszow University of Technology, 35-084 Rzeszów, Poland.

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Summary
This summary is machine-generated.

Fiber-Reinforced Polymer (FRP) composite bridges show good long-term durability. Monitoring revealed minor joint issues that were successfully repaired, maintaining structural integrity and serviceability.

Keywords:
FRP bridgedistributed fibre optic sensingdynamic characteristicsload testrepairsafetystiffensstructural health monitoringvisual inspection

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Area of Science:

  • Civil Engineering
  • Materials Science
  • Structural Health Monitoring

Background:

  • Fiber-Reinforced Polymer (FRP) composite bridges have been operational since the mid-1990s, providing valuable data on long-term performance.
  • Early FRP bridges in the USA and Western Europe were often instrumented for structural integrity assessment.
  • The first all-FRP bridge in Poland utilized a modern structural health monitoring (SHM) system with distributed fibre optic sensing (DFOS).

Purpose of the Study:

  • To evaluate the long-term behavior and structural integrity of an all-FRP composite bridge in Poland.
  • To assess changes in the bridge's strain, stiffness, and dynamic properties over an eight-year operational period.
  • To identify any degradation in performance and determine the effectiveness of repairs.

Main Methods:

  • Utilized a structural health monitoring (SHM) system based on distributed fibre optic sensing (DFOS).
  • Conducted three comprehensive evaluations including static and dynamic load tests over eight years.
  • Assessed changes in strain, stiffness, and dynamic properties to monitor bridge performance.

Main Results:

  • The FRP composite bridge maintained satisfactory structural integrity and durability over eight years of operation.
  • Inadequate quality of adhesive joints between girders and deck panels led to a slight decrease in stiffness and dynamic characteristics.
  • Despite minor performance degradation, the bridge's safety and serviceability remained within design requirements.

Conclusions:

  • FRP composite bridges demonstrate good long-term durability, with monitoring systems crucial for performance assessment.
  • Adhesive joint quality is critical for maintaining optimal performance in FRP bridges.
  • Effective repair strategies can restore compromised FRP bridge components, ensuring continued safety and serviceability.