关键词: 碳纤维板, 侧贴, 底贴, 钢筋混凝土梁

Abstract: Fiber composite materials are widely used in the field of building structural reinforcement. The traditional CFRP reinforcement method is usually externally sticking CFRP, which is prone to peeling damage, easy to wear and corrosion, etc., and the embedded reinforcement method can well avoid the external decoration method. The embedded CFRP reinforcement method mainly has two kinds of reinforcement methods, one is to slot the bottom surface and the other is to be grooved on the side for reinforcement. In this paper, the flexural behavior of the reinforced concrete beams embedded with CFRP panels and the bottom-mounted and bottom-mounted CFRP panels were tested. The bearing capacity and mid-span deflection of the specimens were compared between the two panels in the same reinforcement. The effect of crack development and comparative analysis of the side and bottom reinforcement were investigated. The test results show that both kinds of reinforcement methods can significantly improve the bearing capacity and rigidity of the reinforced beam. And, for the yield load, ultimate load and crack development, the side splicing reinforcement is close to the reinforcement effect of the bottom splicing reinforcement in all aspects. Although the bearing capacity is slightly inferior, the gap is small, the construction convenience, applicability and durability are better, and the bottom panel can be replaced under many conditions.

Key words: carbon fiber reinforced polymer/plastic, side bonding, bottom bonding, reinforced concrete beam