Self-anchored prestressing tensioner for frp quantitative control

Abstract

The invention discloses a self-anchored pre-stress tension machine for quantitative FRP control. The self-anchored pre-stress tension machine for the quantitative FRP control is characterized in that a jack is horizontally arranged on the matched position of the bottom of a stand, and a steering roller is arranged at each of two ends of the upper part of the stand; FRP sheet material bypasses the steering rollers, and two ends of the FRP sheet material are respectively clamped in a wave-shaped plate clamp I and a wave-shaped plate clamp II; a pair of steering pulleys is arranged on a fixed plate at the matched position of one end of the stand in parallel, and a displacement meter of which the contact pin faces to the upside is arranged on the matched position of an upright post at the same end of the stand; a force meter is arranged on the matched position of the bottom of the other end of the stand; the force meter is connected with the end of the wave-shaped plate clamp II far away from the FRP sheet material, and a pair of stretching pulleys is arranged at the end of the wave-shaped plate clamp I far away from the FRP sheet material; a force transmitting steel cable bypasses each stretching pulley and steering pulley, and two ends of the force transmitting steel cable are respectively connected with two pull rods of the jack. The self-anchored pre-stress tension machine for the quantitative FRP control effectively avoids the secondary damage to a fastening structure and realizes to display the deformation amount of the stretched FRP sheet in real time; the self-anchored pre-stress tension machine for the quantitative FRP control is simple and universal.

Description

technical field [0001] The invention relates to a prestressed FRP tensioning device, in particular to a self-anchored prestressed tensioning machine for FRP quantitative control. Background technique [0002] With the widespread use of FRP materials in the field of building reinforcement, especially in order to exert the high-strength properties of FRP, the commonly used method is to apply prestress to FRP. [0003] Usually, the method of applying prestress to the FRP sheet mostly uses the reinforced building structure as a counter force device, and the reinforcement equipment is fixed on the reinforcement structure. This method will cause secondary damage to the reinforcement structure, and the reinforcement equipment cannot reuse. The applied prestress cannot be accurately controlled, and there is no quantitative control device for the machine tool. It is necessary to conduct tests to make an FRP tensile stress control sample table that can be used on site. It is common t...

AI Technical Summary

Problems solved by technology

[0003] Usually, the method of applying prestress to the FRP sheet mostly uses the reinforced building structure as a counter force device, and the reinforcement equipment is fixed on the reinforcement structure. This method will cause secondary damage to the reinforcement structure, and the reinforcement equipment cannot reuse

The applied prestress cannot be accurately controlled, and there is no quantitative control device for the machine tool. It is necessary to conduct tests to make an FRP tensile stress control sample table that can be used on site. It is common to produce tension tools with different parameters for different prestress forces. sexual insufficiency

The measurement of the variables of the FRP sheet after the prestressing is not intuitive enough, and the deformation of the FRP cannot be directly displayed. It needs to be converted, and it is difficult to achieve a large tensile force

In addition, the current tensioning equipment is mostly used in the laboratory, and cannot be widely used in engineering practice. In engineering practice, most of them still use the solution of one case, one discussion, and there is no simple and feasible universal machine tool

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