Anchoring structure for reinforcing T beam FRP

Abstract

The present invention relates to an anchoring structure, in particular to an anchoring structure for reinforcing T-beam FRP, which comprises a reinforcing material FRP sheet at the bottom of the T-beam rib, and a pressing plate at the lower end of the FRP sheet; The pressing plate is supported by at least two U-shaped screw rods with threaded upper ends, and the upper ends of the U-shaped screw rods pass through the T-beam wing plate and the upper edge top plate respectively, and are fastened by gaskets and nuts. The invention utilizes frictional resistance and cohesive force to achieve a good anchoring effect, which not only avoids secondary damage to the reinforced structure, but also does not cause brittle instant damage to the anchoring structure itself, and is simple and convenient in construction, and is not affected by seasons Features, high degree of industrialization, easy to popularize and use.

Description

technical field [0001] The invention relates to an anchoring structure, in particular to an anchoring structure for strengthening T-beam FRP, which belongs to the fields of buildings and bridges. Background technique [0002] In order to make the reinforced FRP sheet work together with the reinforced beam and prevent the FRP sheet from peeling off from the bottom of the beam during work, anchoring measures are generally applied to the FRP sheet. As we all know, the main stress-bearing part of the T-beam is the beam rib, and the wing plate is the roadway slab, which is the non-main stress-bearing part. Under the long-term load, the T-beam beam ribs will have cracks and large deflection, and the bearing capacity will decrease. Therefore, it is necessary to strengthen the beam ribs. The following methods are usually adopted in the prior art: [0003] The first method is to embed screw rods and narrow steel plates, such as figure 1 As shown, the second method is to anchor the...

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Problems solved by technology

[0004] In addition, the above two methods not only have long construction period and complicated process, which will cause secondary damage to the reinforced beam, but also cause brittle failure of the reinforcement device, that is, if the screw filler does not fix the screw well, the anchor device may be damaged. Will be pulled out, resulting in peeling brittle failure together with the reinforcement material

And the screw needs to be deeply buried and multi-point anchored, because when the FRP is anchored, the nut is tightened and the stiffened screw will not be pulled out. The screw needs to be buried deeply. The deeper the screw is buried, the more serious the damage to the beam rib will be; The strip is narrow and the anchoring force is limited, so multi-point anchoring is required. If the anchoring device is installed at multiple points, it will cause secondary damage to the reinforced beam in many places, thus forming a vicious circle

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