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Intelligent hybrid composite FRP (Fiber Reinforce Plastic) prestressed reinforcement based on piezoelectric ceramic and preparation method of intelligent hybrid composite FRP prestressed reinforcement

A technology of prestressed tendons and piezoelectric ceramics, which is applied in the measurement of properties and forces of piezoelectric devices, material analysis by electromagnetic means, structural elements, etc. and other problems, to achieve good ductility and shear performance, improve ductility, and improve shear performance.

Active Publication Date: 2014-06-25
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, applying prestressed reinforced concrete structures with FRP tendons can increase the ultimate bearing capacity in the service stage, but the ductility performance is greatly reduced, which is very unfavorable for engineering earthquake resistance
And because FRP has no obvious plastic flow stage, the damage of FRP structure often shows brittle properties, which is also unfavorable for the safe use of the structure
This leads to the limitation of the application of FRP bars in prestressed concrete structures in civil engineering

Method used

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  • Intelligent hybrid composite FRP (Fiber Reinforce Plastic) prestressed reinforcement based on piezoelectric ceramic and preparation method of intelligent hybrid composite FRP prestressed reinforcement
  • Intelligent hybrid composite FRP (Fiber Reinforce Plastic) prestressed reinforcement based on piezoelectric ceramic and preparation method of intelligent hybrid composite FRP prestressed reinforcement
  • Intelligent hybrid composite FRP (Fiber Reinforce Plastic) prestressed reinforcement based on piezoelectric ceramic and preparation method of intelligent hybrid composite FRP prestressed reinforcement

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Embodiment Construction

[0021] like figure 1 As shown, an intelligent hybrid composite FRP prestressed rib material according to an embodiment of the present invention includes a FRP prestressed rib material 1, and a plurality of grooves are opened on the surface of the FRP prestressed rib material 1 along the buried length direction, and each groove is fixed in There is a piezoelectric ceramic sheet 5 used as a driver, the FRP prestressed tendons 1 are wrapped with a steel mesh 3 coated with an epoxy resin layer on the surface, and the surface of the steel mesh 3 is evenly coated with an epoxy resin layer, The outer surface of the steel mesh 3 is wound with a fiber cloth tape 4 impregnated with epoxy resin, and a plurality of piezoelectric ceramic sheets 2 used as sensors are fixed on the surface of the fiber cloth tape 4 along the buried length direction; The surfaces of the electric ceramic sheet 5 and the piezoelectric ceramic sheet 2 used as sensors are coated with a waterproof layer, and an ins...

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Abstract

The invention discloses an intelligent hybrid composite FRP (Fiber Reinforce Plastic) prestressed reinforcement based on a piezoelectric ceramic and a preparation method of the intelligent hybrid composite FRP prestressed reinforcement. The intelligent hybrid composite FRP prestressed reinforcement is prepared from an FRP prestressed reinforcement, wherein the surface of the FRP prestressed reinforcement is provided with a plurality of grooves, a piezoelectric ceramic piece used as a driver is fixedly arranged in each groove in the embedded length direction and is arranged on one side of the surface of the FRP prestressed reinforcement, a steel wire gauze with the surface coated with an epoxy resin layer is wrapped outsides the FRP prestressed reinforcement, the surface of the steel wire gauze is coated with the epoxy resin layer uniformly, a fiber cloth tape which is soaked by epoxy resin wraps the outer surface of the steel wire gauze, a plurality of piezoelectric ceramic pieces used as sensors are fixed on the surface of the fiber cloth tape in the embedded length direction, and all the piezoelectric ceramic pieces used as the drivers and the sensors are respectively coated with an epoxy resin insulation waterproof layer. With the adoption of the intelligent hybrid composite FRP prestressed reinforcement, the ductility performance and the shear resistance of the FRP prestressed reinforcement are improved, and a monitoring system based on the piezoelectric ceramic is also preset.

Description

technical field [0001] The invention relates to the field of new material development belonging to the fields of civil engineering, transportation and the like, in particular to an intelligent hybrid composite FRP prestressed tendon based on piezoelectric ceramics and a preparation method thereof. Background technique [0002] Fiber reinforced composite material FRP (Fiber Reinforced Polymer / Plastic) rib is a kind of high-performance rib composed of continuous glass fiber, carbon fiber or aramid fiber and polyester, vinyl or epoxy resin. Advanced composite materials, especially carbon fiber reinforced composite material CFRP (Carbon Fiber Reinforced Polymer / Plastic) bars, are characterized by their high strength (some are higher than 3000MPa, about 2 times that of high-strength prestressed steel bars) and light weight (about 1 / 1 / 2 of that of steel). 5), excellent properties such as corrosion resistance and fatigue resistance are very promising to become potential substitutes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C5/07E04C5/08G01L1/16G01N27/00
Inventor 蒋田勇田仲初罗舟滔梁潇江名峰
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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