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Pre-stored stress rib with composite structure and manufacturing method thereof

A technology of pre-existing stress tendons and composite structures, applied in the direction of structural elements, building structures, building components, etc., can solve problems such as low elongation rate, and achieve the effects of preventing cracking, increasing durability, and increasing crack resistance.

Active Publication Date: 2013-04-17
王子国
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the limitations of the existing prestressing technology, the present invention aims to provide a composite structure pre-stored stress tendons and its manufacturing method, the stress tendons themselves can store prestress, the method can increase the flexibility and simplicity of prestress reinforcement better improve the mechanical performance of the structure; solve the problem of low elongation of reinforcements without prestressed fibers or fiber bundles, and increase the toughness of brittle materials

Method used

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  • Pre-stored stress rib with composite structure and manufacturing method thereof
  • Pre-stored stress rib with composite structure and manufacturing method thereof
  • Pre-stored stress rib with composite structure and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] Such as Figure 21A As shown, first, a method of manufacturing the CFRP (carbon fiber reinforced composite material) outer pipe 3 will be described. Figure 15 It is a schematic diagram of the manufacturing method of the fiber bundle outer tube 3 and the fiber bundle mandrel 4 . Arrange several pitch-based continuous carbon fibers in parallel in the same direction on the mandrel, or weave and twist on the mandrel, soak in the mixed glue solution with 50% weight of phenolic resin and ethanol, and pultrude through the forming hole , heated at 300°C for 1 hour to cure the phenolic resin to make a CFRP outer tube. The medium of the CFRP outer tube can also use polyimide. The inner and outer surfaces of the CFRP outer tube can be treated to be uneven to increase its bonding force with the base material and the inner structure of the tube. During the manufacturing process of the CFRP outer tube, the inner diameter and outer diameter of the CFRP outer tube 3 are changed by ...

Embodiment 2

[0166] The manufacturing method of the CFRP outer tube 3 is the same as that in Embodiment 1.

[0167] Next, a method for manufacturing the CFRP (carbon fiber reinforced composite material) mandrel 4 will be described. Such as Figure 15 , several pitch-based continuous carbon fiber bundles arranged in the same direction are soaked in polyimide adhesive, pultruded through forming holes, heated and cured, and made into CFPR mandrel 4 . Soak the conductive heating wire 15 coated with insulating varnish in the epoxy resin glue solution with curing agent, and then weave the mesh conductive heating wire 15 on the surface of the CFPR mandrel 4 as a heating element, or wind it on the CFPR mandrel The twisted conductive heating wire 15 is used as a heating element, the epoxy resin is cured, and the conductive heating wire 15 is bonded on the surface of the mandrel to form a CFPR mandrel 4 with a heating element.

[0168] If epoxy resin is used as the medium, one method is to soak se...

Embodiment 3

[0172] The manufacturing method of the high-strength steel wire spliced ​​outer tube 3 will be described below. During the forming process of high-strength steel wire, the cross-sectional shape of the wire drawing is as follows: Figure 13 11 of them. The outer tube 3 is formed by assembling three tube pieces 11 . The splicing connection method can use modified high-temperature-resistant epoxy resin adhesive 21 or inorganic adhesive to splice the pipes at the splicing seam 12 , or directly wind the silk thread to bundle the segments 11 into the outer pipe 3 . In the surface bonding treatment of the spliced ​​outer tube 3, except for the seam surface, other surfaces of the steel wire can be treated with suitable spiral ribs to increase the binding force between the outer tube 3, the base material and the adhesive 5. On the division of the assembled outer tube 3, the outer tube 3 can be assembled from two pieces, or assembled from more pieces. Figure 17 It is a schematic dia...

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Abstract

The invention discloses a pre-stored stress rib with a composite structure and a manufacturing method thereof, which aims at solving the problems of the limit of the conventional pre-tensioning method and post-tensioning method pre-stressing technique and the making up of rib lying by using the pre-stressing technique. The stress rib is a tension and compression balance body formed by adhering and anchoring an outer tube with a core rod or an inner tube, a heating unit is arranged in the tension and compression balance body, and the adhesion strength of an adhesive or the strength of the core rod are controlled by the temperature rising of the heating unit. When the pre-stored stress rib with the composite structure is arranged in an objective body, the temperature is raised through the heating unit, the core rod cannot provide a support force to the outer tube, and the outer tube is thereby shrunk or elongated, so that the tension and compression balance of an original structure is broken. A pre-compression stress or a pre-tension stress is exerted to the objective body through the adhesion of the outer tube and the objective body base material, so that a new tension and compression balance body is formed through the outer tube and the objective body, i.e., the pre-stress stored in the pre-stored stress rib with the composite structure is released to the objective body so as to exert the pre-stress to the objective body.

Description

technical field [0001] The invention relates to a pre-stored stress tendon of a composite structure capable of providing pre-stress to a target body, having the functions of storing pre-stress and controlled release of pre-stress, a manufacturing method and a pre-stress releasing technology and method. Background technique [0002] Prestressing technology brings good durability, crack resistance, water resistance, impact resistance and other advantages to structures and components, so prestressing technology has been widely used in various engineering structure fields in the world. Its applications include railway bridges, highways, storage tanks, hydraulic structures, airport runways, marine structures, nuclear power plant containment and other places that require prestressing. [0003] There are two commonly used prestressing techniques: pre-tensioning and post-tensioning. The common point of both is that the stress obtained after the prestressed tendon is mechanically st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C5/00E04C5/10
Inventor 王子国王子良孙宇雁王文杰艾文虎王泽龙
Owner 王子国
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