EBR Strengthening Technique for Concrete, Long-Term Behaviour and Historical Survey
Christoph Czaderski1, Urs Meier2
1Swiss Federal Laboratories for Materials Science and Technology (Empa), Überlandstrasse 129, 8600 Dübendorf, Switzerland. christoph.czaderski@empa.ch.
Polymers
|April 11, 2019
Summary
This study reviews historical strengthening techniques for concrete structures, including epoxy bonded steel plates and fiber-reinforced polymers (FRPs). Long-term monitoring data from a 47-year steel plate and a 20-year FRP bridge application demonstrate the durability of these methods.
Area of Science:
- Civil Engineering
- Materials Science
- Structural Engineering
Background:
- External strengthening techniques for concrete structures, such as epoxy bonded steel plates (introduced in the 1960s) and fiber-reinforced polymers (FRPs, introduced in the 1990s), have decades of application.
- Long-term monitoring is crucial for validating the reliability and confidence in these structural strengthening methods.
Purpose of the Study:
- To provide a historical overview of the development and adoption of epoxy bonded steel plates and FRPs in the construction industry.
- To present and analyze data from two extensive, long-term monitoring campaigns of structures strengthened with these techniques.
Main Methods:
- A historical survey of the introduction and evolution of epoxy bonded steel plates and FRPs in construction.
- Detailed presentation of a 47-year monitoring campaign for an epoxy bonded steel plate on a concrete beam.
- Description of a 20-year monitoring campaign for an epoxy bonded carbon fiber reinforced polymer (CFRP) strip application on a road bridge.
Main Results:
- The historical review outlines the progression of these strengthening technologies over 50 and 25 years, respectively.
- The 47-year monitoring campaign on the concrete beam provides insights into the long-term performance of epoxy bonded steel plates.
- The 20-year monitoring campaign on the road bridge offers data on the durability and effectiveness of epoxy bonded CFRP strips in real-world conditions.
Conclusions:
- Both epoxy bonded steel plates and FRPs have a long history of successful application in concrete structure strengthening.
- The presented long-term monitoring data provide strong evidence for the durability and reliability of these external strengthening techniques.
- Continued monitoring reinforces confidence in the use of epoxy bonded steel plates and FRPs for extending the service life of concrete structures.
Keywords:
CFRPEBRbondepoxy adhesiveexternally bonded reinforcementlong-term behavioursteelstrengthening of reinforced concreteMore Related Videos
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