Structural integrity of FRP composites exposed to fire

As previously mentioned, mechanical properties of polymer composites degrade at elevated temperatures. This degradation is more pronounced for 

For concrete structures reinforced by FRP rebars, exposure to fire also induces a progressive rise of the internal temperature. As FRP rebars are embedded in concrete, the lack of oxygen will inhibit their burning. However, if temperature within the structure exceeds Fg, softening of the polymer matrix may compromise the stress transfer at the concrete/rebar interface and lead to bond failure (Saafi, 2002). This may result in increased load deflection and ultimately to the collapse of the structure. It has been demonstrated that 

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