EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR OF REINFORCED BEAMS AFFECTED BY THE DIFFERENT MATERIALS AND METHODS OF REINFORCEMENT

Abstract

Abstract: To study the influence of different materials, reinforcement amounts, and reinforcement methods on the carrying capacity, deflection change, failure modes and crack propagation of reinforced beams, 11 experimental beams were subjected to the four-point loading test. The results show that the cracking load, yield load, ultimate load and load-deflection curve of the test beams were directly affected by the materials and methods of reinforcement. The promotion of cracking load was mainly affected by the reinforcement method, and the cracking loads of the reinforced beams embedded spiral ribbed steel wires with fishtail and grille were increased obviously, which was up to 182% higher than that of the reinforced beams by the straight embedded reinforcement method. The yield load and ultimate load of the reinforced beams used the end anchorage method were increased most obviously with the same amount. The ultimate load of reinforced beams with embedded Carbon Fiber Reinforced Polymer/Plastic (CFRP) bars was the largest, which is increased by 113.68%. The reinforced materials had obvious influence on the flexural rigidity of the reinforced beams, and the flexural rigidity of beams with CFRP bars was optimum. The flexural rigidity of cross-embedded, fishtail-embedded, grille, and end-anchorage reinforced beams was significantly better than that of the straight-embedded reinforced beams.

Key words: reinforced concrete beams, Near Surface Mounted, CFRP, spiral ribbed steel wires, flexural behavior

CLC Number:

TB332

XU Ping, DAI Jun-feng, DING Ya-hong, MA Jin-yi. EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR OF REINFORCED BEAMS AFFECTED BY THE DIFFERENT MATERIALS AND METHODS OF REINFORCEMENT[J]. Composites Science and Engineering, 2019, 0(11): 50-57.

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