Device and method for vertically tensioning prestressed carbon fiber plate

Abstract

The invention discloses a device and method for vertically tensioning a prestressed carbon fiber plate, and belongs to the technical field of bridge reinforcement. The device comprises a carbon fiber plate; a fixed end base connected to one end of the carbon fiber plate; a tensioning end base which is connected to the other end of the carbon fiber plate and comprises a tensioning assembly used for tensioning the carbon fiber plate; and a power end base which is close to one side of the tensioning end base and is used for providing tension required for tensioning the carbon fiber plate for the tensioning assembly; wherein the central axis of the carbon fiber plate, the central axis of the tensioning assembly and the tension output axis of the power end base are located on the same horizontal plane. According to the device, a tensioning screw mainly bears axial tension in the tensioning process of the carbon fiber plate, bending deformation is small, the tension applied by the jack can be completely transmitted to the carbon fiber plate, and the design value is achieved.

Description

technical field [0001] The invention belongs to the technical field of bridge reinforcement, and more specifically relates to a device and method for vertically tensioning a prestressed carbon fiber plate. Background technique [0002] When tensioning the existing prestressed carbon fiber panel system, such as figure 1 As shown, the jack pressure acts on the tension cross block, and the tension cross block transmits the tension to the tension end anchor block clamping the carbon fiber plate through two tension screws, and finally generates tensile stress in the carbon fiber plate. [0003] In the existing tensioning method, the long axis direction of the jack is the same as that of the carbon fiber plate and the tension screw. The diameter is about 10cm, so the center of the jack is about 5cm from the concrete surface. In the existing method, the centers of the jack, the tensioning screw, and the carbon plate are not in the same plane, which will cause eccentricity during ...

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Problems solved by technology

[0006] Aiming at the existing defects that the stretching screw warps due to the large tension eccentricity when stretching the prestressed carbon fiber plate, so that the tensile stress of the carbon fiber plate cannot reach the design value after stretching, the present invention provides a vertical The device and method for tensioning and prestressing the carbon fiber plate make the tension screw mainly bear the axial tension during the tensioning process of the carbon fiber plate, and the bending deformation is small, and the tension applied by the jack can be completely transmitted to the carbon fiber plate, reaching the design value

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