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FRP (fiber reinforced plastic) optical fiber intelligent composite rib embedded with steel strand

A technology of optical fiber intelligence and steel strands, which is applied to measurement, instruments, thermometers, etc. by measuring the change of optical properties of materials when they are stressed, can solve the problems of low strength and low modulus, and achieve excellent mechanical properties. The effect of overcoming the difficulty of structural internal force testing

Inactive Publication Date: 2011-08-10
DALIAN UNIV OF TECH
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Problems solved by technology

However, as a structural material, smart FRP still has the Achilles' heel of low modulus and low strength

Method used

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  • FRP (fiber reinforced plastic) optical fiber intelligent composite rib embedded with steel strand
  • FRP (fiber reinforced plastic) optical fiber intelligent composite rib embedded with steel strand
  • FRP (fiber reinforced plastic) optical fiber intelligent composite rib embedded with steel strand

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Embodiment Construction

[0017] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0018] Figure 1 ~ Figure 3 It is a schematic diagram of the structure of a series of embedded steel strand FRP optical fiber smart composite bars, hereinafter referred to as smart bars. The smart rib is made by thermal pultrusion, including 1 optical fiber and 5 fiber gratings, 3 fiber reinforced resin FRP, 2 steel strands and 4 loose tubes. figure 1 , a 1 optical fiber is placed in the smart bar, and 2 steel strands are placed in the middle or outside of the smart bar; figure 2 , 5 fiber gratings are placed in the smart bar, and 2 steel strands are placed in the middle or outside of the smart bar; image 3 Among them, a 1 optical fiber and a 5 fiber grating are placed in the smart rib, and 2 steel strands are placed in the middle or outside of the smart rib. Considering that 2 steel strands break 1 optical fib...

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Abstract

The invention discloses an FRP (fiber reinforced plastic) optical fiber intelligent composite rib embedded with a steel strand, which belongs to the technical field of safety monitoring and structural materials and is characterized in that the steel strand and the optical fiber or a fiber bragg grating are parallelly embedded in the FRP rib along the length direction of fiber resin and are organically integrated through a pultrusion process, wherein the steel strand is embedded in the middle of the FRP rib, the optical fiber or the fiber bragg grating is embedded at the outer side of an FRP covering; or the optical fiber or the fiber bragg grating is embedded in the middle of the FRP rib, and the steel strand is embedded at the outer side of the FRP covering. The FRP optical fiber intelligent composite rib has the effects and advantages that the optical fiber intelligent composite rib has high modulus, good durability and self-sensing property, and can be widely applied to projects of bridge stay cables and booms and the like as a novel material in civil engineering and a sensing element for long-time monitoring.

Description

technical field [0001] The invention belongs to the technical field of safety monitoring and structural materials, and relates to an engineered high-modulus, high-durability structural material and structural intelligent monitoring and sensing elements integrated with an embedded steel strand FRP optical fiber intelligent composite bar. Background technique [0002] Corrosion-resistant structural materials and structural safety monitoring are the core and important development directions of civil engineering. At present, fiber-reinforced resin structural materials (FRP), which have the characteristics of good durability, light weight and high strength, non-magnetic, fatigue resistance and pseudo-elasticity in the whole process, have been widely researched and partially successfully applied all over the world. It is processed into various forms, FRP bars replace deformed steel bars or bridge cable wires, FRP panels are combined with concrete to form composite panels, tubular ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C5/07E01D19/16G01K11/32G01L1/24G01K11/322
Inventor 何建平周智兰春光黄明华欧进萍
Owner DALIAN UNIV OF TECH
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