SAGGING AND HOGGING STRENGTHENING CONTINUOUS REINFORCED CONCRETE BEAMS USING CARBON FIBER-REINFORCED POLYMER SHEETS

The testing of 11 reinforced concrete 2-span beams strengthened in flexure with externally bonded carbon fiber-reinforced polymer (CFRP) sheets is reported. The beams were classified into 2 groups according to the arrangement of the internal steel reinforcement. Each group included 1 unstrengthened control beam. The main parameters studied were the position, length, and number of CFRP layers. External strengthening using CFRP sheets was found to increase the beam load capacity. All strengthened beams exhibited less ductility compared with the unstrengthened control beams, however, and showed undesirable sudden failure modes. There was an optimum number of CFRP layers beyond which there was no further enhancement in the beam capacity. Extending the CFRP sheet length to cover the entire hogging/sagging zones did not prevent peeling failure of the CFRP sheets, which was the dominant factor mode of beams tested.

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  • English

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  • Accession Number: 00960599
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 16 2003 12:00AM