Important characteristics of FRP’s for structural repair and strengthening applications are their non-corrosive properties, timeliness and ease of installation, low cost relative to demo and reconstruction. FRP materials can be adhered to beams and slabs to increase their shear and flexural capacity, and can be wrapped around columns to increase their load carrying capacity and ductility during seismic events.
FRP systems may also comprise of pre-manufactured strips and plates that are bonded to structural slabs, steel, deck, etc. using epoxy resin. Pre-cured FRP elements are more suited for flexural upgrade of columns, beams, and slabs. As with any other externally bonded system, the bond between the FRP system and the existing concrete is critical to achieve a composite behavior with the existing member. Accordingly, the most current National Association of Corrosion Engineers, and Society of Protective Coating Standards are used for proper surface preparation for ensuring a successful FRP structural upgrade.