Review on post-heated reinforced concrete columns repaired with FRP jackets

The post-heated RC columns can be repaired by the fiber-reinforced polymer (FRP) to rehabilitate thecompressive strength losses that originate from fire damage. The amount of residual compressivestrength of post-heated reinforced concrete columns depends on the rate of heating and duration time ofthermal exposure. On the other hand, the thickness of the FRP layer and the cross-section geometryimpact improving the compressive strength of post-heated columns. In this study, both circular and noncircularreinforced concrete columns were heated up to the same target temperature of ۵۰۰°C using thesame heating method, but with different fire histories. The heat-damaged columns were then wrappedwith FRP. A comparison of the results of previous studies indicates that the axial load-carrying capacityof the heated damaged circular and non-circular RC columns repaired by one-layer CFRP can beimproved up to a considerable level of the axial load capacity of the unheated columns.

Keywords:

RC columns , rate of heating , post-heated , FRP , axial load capacity