Prestressed FRP plate reverse tensioning anchoring assembly and using method thereof

Abstract

The invention discloses a prestressed FRP plate reverse tensioning anchoring assembly and a using method thereof. The assembly comprises a tensioning end assembly and a fixed end assembly, wherein thetensioning end assembly comprises a tensioning end pedestal, a tensioning end anchor, a pedestal additional piece, an anchor additional piece, a counter-force top plate, a tensioning screw rod and ajack; and the using method of the assembly comprises the following steps that (S1) the tensioning end pedestal and a fixed end pedestal are fixed; (S2) the pedestal additional piece and the anchor additional piece are fixed; (S3) an FRP plate is fixed; (S4) a fixed end anchor and the tensioning end anchor are fixed; (S5) the tensioning screw rod passes through the anchor additional piece, the pedestal additional piece, and the counter force top plate; (S6) the jack is placed between the anchor additional piece and the counter-force top plate to apply a pretension to the FRP plate; and (S7) thepedestal additional piece, the anchor additional piece, the counter-force top plate, and the jack are taken down. The assembly can uniformly apply prestress to the FRP plate, and reduces the construction space, the structure of the device is simple, and the practical application is facilitated.

Description

technical field [0001] The present invention relates to an anchoring assembly and a using method thereof, more particularly, to a prestressed FRP plate reverse tensioning anchoring assembly and a using method thereof. Background technique [0002] Fiber-reinforced composite material FRP has the advantages of light weight, high strength, good durability, and convenient construction. Externally attached FRP panels have been widely used in engineering structure reinforcement. The results of the test and engineering practice show that the FRP plate is only attached to the surface of the structure for reinforcement, and the FRP peeling failure often occurs. At the same time, due to secondary stress and other reasons, the reinforcement effect is very limited, and the high-strength characteristics of FRP cannot be fully utilized. Passive reinforcement. The combination of external prestressed anchorage technology and FRP reinforcement technology can not only give full play to the h...

AI Technical Summary

Problems solved by technology

The conventional prestressed FRP plate reinforcement technology mostly adopts the forward tensioning method, which needs to set up a tensioning platform at both ends of the beam to be reinforced or install a jack baffle to complete the tensioning work. This method requires a large operating space, resulting in the actual reinforcement length At the same time, in the actual engineering application, the construction will be restricted due to the limited space

The patent document with the publication number CN106193643A discloses a prestressed CFRP plate tension anchor device for reinforcing steel beams and composite beams. The anchor device uses a through-hole jack located outside the tension device, which can reduce the construction space. The use of double jacks in the construction will easily cause uneven force of the jacks on both sides during the tensioning process, resulting in unbalanced tensioning, which makes it difficult to achieve the expected effect of the applied prestress. In addition, the device has a wider width, a more complex structure, and a larger amount of steel

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