A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Sprayed fiber reinforced polymers for repair and strengthening
Non-corrosive and lightweight materials like fiber reinforced polymers (FRPs) are fast replacing steel as a material of choice in rehabilitation projects. FRPs are easy to apply and have proven both effective and economical for strengthening, rehabilitation and seismic retrofit of columns, beams, masonry, joints, and other structures. All research to date has focused, however, on FRP wraps and jackets with continuous, unidirectional fibers. In this paper, an entirely new method of repair using Sprayed Fiber Reinforced Polymer (SFRP) coatings is described. Pioneered at the University of British Columbia, the technique consists of spraying polymer and short, randomly distributed fibers concurrently on the surface of concrete to be repaired using a spray gun. A 2-dimensional random distribution of fibers is obtained on the application surface. This paper describes the spray process and compares the laboratory performance of the spray to traditional FRP wrap in the context of full-scale reinforced concrete bridge girders. Finally, the application of Sprayed FRP to a bridge strengthening project in British Columbia is described.
Sprayed fiber reinforced polymers for repair and strengthening
Non-corrosive and lightweight materials like fiber reinforced polymers (FRPs) are fast replacing steel as a material of choice in rehabilitation projects. FRPs are easy to apply and have proven both effective and economical for strengthening, rehabilitation and seismic retrofit of columns, beams, masonry, joints, and other structures. All research to date has focused, however, on FRP wraps and jackets with continuous, unidirectional fibers. In this paper, an entirely new method of repair using Sprayed Fiber Reinforced Polymer (SFRP) coatings is described. Pioneered at the University of British Columbia, the technique consists of spraying polymer and short, randomly distributed fibers concurrently on the surface of concrete to be repaired using a spray gun. A 2-dimensional random distribution of fibers is obtained on the application surface. This paper describes the spray process and compares the laboratory performance of the spray to traditional FRP wrap in the context of full-scale reinforced concrete bridge girders. Finally, the application of Sprayed FRP to a bridge strengthening project in British Columbia is described.
Sprayed fiber reinforced polymers for repair and strengthening
Banthia, N. (author) / Nandakumar, N. (author) / Boyd, A.J. (author)
2002
14 Seiten, 15 Quellen
Conference paper
English
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