Long term performance and fire safety aspect of FRP composites used in building structures

- Moisture causes a shift in failure mode in FRP-bonded systems.
- Deterioration of FRP-bonded system can be investigated by multiscale modeling.
- Non-destructive testing methods are encouraged for assessing interface integrity.
- Seawater/sea-sand concrete reinforced by FRP rebar has great corrosion resistance.
- Fire behavior of FRP is well recognized but smoke emission issue remains unsolved.

Fiber reinforced polymer (FRP) composites are widely used in repairing concrete or wood structures. However, the long term performance of FRP-bonded systems can be seriously affected due to the prolonged exposure to aggressive environments. Besides, the fire attack towards FRP is another safety concern in composite structures. This paper shows the recent research developments on (1) the deterioration of FRP-bonded system, (2) the evaluation of interfacial integrity, (3) FRP-reinforced system with excellent durability, and (4) the fire behavior of FRP. Future research perspectives for durability study and recommendations towards fire safety issue upon the use of FRP are also provided.