Laminated wood used for prestress FRP (Fiber Reinforce Plastic) reinforced bamboo wood structure and manufacture method thereof

Abstract

The invention discloses a laminated wood used for a prestress FRP (Fiber Reinforce Plastic) reinforced bamboo wood structure and a manufacture method thereof. The material comprises wood layers (1), an FRP layer (2) and bamboo wood layers (3), wherein the FRP layer (2) adopts the FRP to which tension prestress is applied; all layers are bonded in a sequence that one wood layer (1), one bamboo wood layer (3), one FRP layer (2), one bamboo wood layer (3) and one wood layer (1) are successively arranged; two ends of the FRP layer (2) are both fixedly arranged on the end parts of the wood layers (1) by anchor devices. The manufacture method comprises the following steps: respectively carrying out a wood preprocessing working procedure, a bamboo wood preprocessing working procedure and an FRP preprocessing working procedure; in the above sequence, carrying out bonding overlay; respectively installing the anchor device on two ends of the FRP layer (2) so as to form laminated wood used for the prestress FRP reinforced bamboo wood structure. According to the embodiment of the invention, the bending strength of the laminated wood used for the prestress FRP reinforced bamboo wood structure can be greatly improved, and the laminated wood has the advantages of high strength weight ratio, strong durability, high-quality wood saving, high cost performance and simple manufacture method.

Description

technical field [0001] The invention relates to the field of engineering composite materials, in particular to a prestressed FRP reinforced laminated timber for bamboo and wood structures and a manufacturing method thereof. Background technique [0002] FRP is the abbreviation of Fiber-reinforced polymer. The Chinese name is fiber-reinforced composite material. It is a composite material with fiber as the reinforcement material and resin as the matrix. It has the characteristics of high strength and low density. FRP reinforced structural glulam is an advanced engineered wood composite material with superior performance obtained by reinforcing wood with FRP as a reinforcement. The tensile strength of FRP is about 10 times that of wood, so the glulam for FRP reinforced structure can make up for the defects of the wood itself, so that the overall physical and mechanical strength of the glulam can be improved. However, in the prior art, the reinforcing effect of FRP without pre...

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Problems solved by technology

However, in the prior art, the reinforcing effect of FRP without prestress on glulam is not obvious, and compared with pure wood, it can only increase the flexural strength by 20% to 40%. When the stress reaches 20% to 30% of the ultimate strength of FRP, the flexural strength of the laminated glulam can be increased by 50% to 60%. The prestress applied on FRP exceeds 20% to 30% of the ultimate strength of FRP, then after composited into glulam, the shear stress generated by the shrinkage of prestressed FRP will cause the adhesive layer or wood to shear and fail. The applied prestress can only reach 20% to 30% of the ultimate strength of FRP, which obviously does not give full play to the high tensile performance advantages of FRP.

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