FLEXURAL TESTS OF RC BEAMS STRENGTHENED WITH NEAR SURFACE MOUNTED MIXED FRP RODS

Abstract

Abstract: Reinforced concrete beams were strengthened with near surface mounted (NSM) fiber reinforced polymer (FRP) rods into pre-cut grooves at the flexural zone and negative moment zone for simple supported beams and continuous RC beams. Flexural tests were monotonically carried out with NSM CFRP/BFRP hybrid rods under various initial loading. Experimental phenomena were recorded under loading levels such as crack width, typical loads, strains of steel bar/FRP rods and deformation. Test results show that flexural performances are increased for simple-supported and continuous RC beams strengthened with NSM hybrid FRP rods, especially for flexural capacity and normal stage performance. In comparison with RC beams with NSM single FRP rods, similar crack development and displacement ductility are better for beams with NSM hybrid rods. For test beams under initial loading, strengthen effect is slightly worse than beams without initial loading. External load is suggested to be removed as much as possible in field structure member.

Key words: RC bridge girder, NSM, hybrid FRP rods, flexural behavior

CLC Number:

TB332

WANG Xing-guo, DAI Bo, ZHANG Peng-fei. FLEXURAL TESTS OF RC BEAMS STRENGTHENED WITH NEAR SURFACE MOUNTED MIXED FRP RODS[J]. Fiber Reinforced Plastics/Composites, 2018, 0(1): 45-49.

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