الفهرس | Only 14 pages are availabe for public view |
Abstract This thesis presents comparisons between fastening systems of different techniques to increase the flexural and shear capacity of reinforced concrete beams strengthened with Carbon fiber reinforced polymer (CFRP) strips and Glass fiber reinforced polymer (GFRP) laminates using externally bonded techniques without and with mechanical anchoring. A series of flexural and shear tests were conducted on 18 (100*200*1200 mm) reinforced concrete beams. The beams were tested in three point bending, under the effect of concentrated central load incrementally increasing until failure. A comparative study of fastening methods on 18 reinforced concrete beams repaired and strengthened using glass fiber reinforced polymers (GFRP) laminates and carbon fiber reinforced polymers (CFRP) strips using externally and mechanically anchorage systems, and also the installation efficiency, level of strengthening achieved, and preventing strip de-lamination before concrete crushing. Then, both flexural behavior and failure mode of those beams have been studied. Keywords: Flexural strengthening; Shear strengthening; Concrete reinforced Beams; Carbon fiber reinforced polymers strips; Glass fiber reinforced polymers laminates; Anchorage with bolts. |