CFRP sheet composite string beam structure reinforcement installation system

Abstract

The invention discloses a CFRP sheet reinforcement installation system. The CFRP sheet reinforcement installation system comprises a beam body, n+1 CFRP sheets, n fixed supports and 2n+2 anchorages, nis a positive integer greater than or equal to 1, the beam body is horizontally arranged, the fixed supports are vertically arranged on the lower surface of the beam body, two anchorages are hinged to the lower ends of the fixed supports, two hinged seats are further arranged at the two ends of the lower surface of the beam body, and the fixed supports are located between the two hinged seats. Anchorages are hinged to the two hinged seats correspondingly. CFRP sheets are arranged between the hinged seats and the adjacent fixed supports. CFRP sheets are further arranged between the two adjacent fixed supports, and the two ends of the CFRP sheets are clamped on the corresponding anchorages. The CFRP sheet reinforcement installation system has the remarkable effects that in the clamping andstretching process of the CFRP sheets, the stress of the CFRP sheets is dispersed, and the uniform stress of the CFRP sheets is ensured. Because the CFRP sheets can form any angle through hinge pieces, the CFRP sheets can be stretched along the straight line, and the shear failure of the CFRP sheets is avoided, and thus the bearing capacity of a reinforced member is improved.

Description

technical field [0001] The invention relates to a reinforcement and installation system of a CFRP sheet combined string beam, in particular to a CFRP sheet composite string beam reinforcement installation system. Background technique [0002] Concrete beams in modern buildings, traffic, bridges and other engineering structures are subject to load changes due to environmental erosion, material aging, structural function changes, or insufficient bearing capacity or cracks due to natural and human disasters, etc. Huge security risk. [0003] Reinforcement and repair of engineering structures is the most important solution at present. Carbon fiber reinforced composite materials (referred to as CFRP) have the characteristics of light weight, high strength, corrosion resistance, fatigue fracture resistance, not easy to creep, low linear expansion coefficient and relaxation rate, etc. , widely used in the reinforcement and repair of engineering structures. According to the shape ...

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Problems solved by technology

[0004] The existing corrugated tooth anchors use two independent anchors to clamp the CFRP sheet, and then tighten the two anchors by threading tensioning screws, and the tensioning screws are distributed outside the edge of the CFRP sheet , because the stress at the tightening screw is relatively concentrated during clamping, the part of the CFRP sheet close to the tightening screw may be broken or damaged due to excessive force; moreover, the shear resistance of the CFRP sheet is poor, when When the CFRP sheet is tensioned and attached to the bottom of the bridge, the carbon fiber reinforced composite is prone to brittle fracture when subjected to an external force perpendicular to the plane of the CFRP sheet

[0005] In addition, when the CFRP sheet is directly stretched on the lower part of the reinforced member (such as the bridge deck), even if there is no unfavorable situation such as prestress loss or anchorage node damage, because it does not completely improve the stress of the reinforced member, it will have a negative impact on the reinforced member. The reinforcement effect is very limited

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