FRP composite wrapped grooved-wall lining tubular structure, and method of manufacturing

Patent metadata

Field	Value
Publication number	US-9566748-B2
Application number	US-201414272375-A
Country	US
Kind code	B2
Filing date	May 7, 2014
Priority date	Dec 9, 2013
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A forming tube for forming and reinforcing a concrete column includes a tubular lining and a fiber-reinforced composite shell. The tubular lining is made from a first material, and has inner and outer tubular surfaces. The inner tubular surface has a plurality of ridge units displaced from one another in a direction of an axis. Each ridge unit has a plurality of ridges displaced from one another in a circumferential direction. The fiber-reinforced composite shell is made from a second material different from the first material, and is configured to enclose the outer tubular surface. The fiber-reinforced composite shell is formed by winding a prepreg filament on the outer tubular surface, followed by curing the prepreg filament.

First claim

What is claimed is:

1. A forming tube for forming and reinforcing a concrete column, comprising:
a tubular lining made from a first material, configured to extend along an axis to terminate at first and second peripheral ends, and having
an inner tubular surface including a plurality of ridge units displaced from one another in a direction of the axis, each of said ridge units including a plurality of ridges displaced from one another in a circumferential direction, and
an outer tubular surface opposite to said inner tubular surface in radial directions; and

a fiber-reinforced composite shell which is made from a second material different from said first material, and which is configured to enclose said outer tubular surface, said fiber-reinforced composite shell being formed by winding a prepreg filament on said outer tubular surface, followed by curing the prepreg filament.

2. The forming tube of claim 1 , wherein said ridges of each of said ridge units are configured to extend in the circumferential direction and in line with each other such that each of said ridge units has an annular shape, and such that a plurality of grooves are each defined by two adjacent ones of said ridge units, each of said grooves being configured to render said inner tubular surface corrugated.

3. The forming tube of claim 2 , wherein said outer tubular surface is corrugated.

4. The forming tube of claim 1 , wherein said first peripheral end has a plurality of first direction reversing guides displaced from one another in the circumferential direction, and said second peripheral end has a plurality of second direction reversing guides displaced from one another in the circumferential direction to permit said prepreg filament to be wound alternately and sequentially on said first and second direction reversing guides so as to have a plurality of filament segments extending in the direction of the axis.

5. The forming tube of claim 1 , wherein said prepreg filament is wound about the axis.

6. The forming tube of claim 1 , wherein said first material is a metal material or a plastic material.

7. The forming tube of claim 1 , wherein the fiber-reinforced composite shell is a seamless fiber-reinforced composite shell.

8. A method of manufacturing a forming tube for forming and reinforcing a concrete column, comprising the steps of:
(a) providing a tubular lining that is made from a first material, that extends along an axis to terminate at first and second peripheral ends, and that has
an inner tubular surface including a plurality of ridge units displaced from one another in a direction of the axis, each of the ridge units including a plurality of ridges displaced from one another in a circumferential direction, and
an outer tubular surface opposite to the inner tubular surface in radial directions;

(b) winding a prepreg filament on the outer tubular surface to enclose the outer tubular surface, the prepreg filament being made from a second material different from the first material; and
(c) curing the prepreg filament so as to obtain a fiber-reinforced composite shell.

9. The method of claim 8 , wherein step (b) includes the sub steps of:
(b 1 ) providing a mandrel which extends lengthwise to terminate at first and second mandrel ends;
(b 2 ) sleeving the tubular lining on the mandrel such that the first peripheral end and the first mandrel end cooperatively define a first surrounding gap therebetween, and the second peripheral end and the second mandrel end cooperatively define a second surrounding gap therebetween;
(b 3 ) providing a jig which has an outer friction surface and sleevably mounting the jig on the mandrel so as to permit the jig to be fitted in one of the first and second surrounding gaps, with the outer friction surface in friction engagement with the inner tubular surface to thereby permit rotation of the tubular lining with the mandrel; and
(b 4 ) feeding the prepreg filament to the outer tubular surface of the tubular lining such that when the tubular lining is rotated with the mandrel, the prepreg filament is wound on the outer tubular surface to enclose the tubular lining.

10. The method of claim 9 , wherein the prepreg filament is wound about the axis.

11. The method of claim 8 , wherein the first peripheral end has a plurality of first direction reversing guides displaced from one another in the circumferential direction, the second peripheral end having a plurality of second direction reversing guides displaced from one another in the circumferential direction to permit the prepreg filament to be wound alternately and sequentially on the first and second direction reversing guides so as to have a plurality of filament segments extending in the direction of the axis.

12. The method of claim 8 , wherein the first material is a metal material or a plastic material.

13. The method of claim 8 , wherein the ridges of each of the ridge units are configured to extend in the circumferential direction and in line with each other such that each of the ridge units has an annular shape, and such that a plurality of grooves are each defined by two adjacent ones of the ridge units, each of the grooves being configured to render the inner tubular surface corrugated.

14. The method of claim 13 , wherein the outer tubular surface is corrugated.

15. The method of claim 8 , wherein the prepreg filament is wound around the outer tubular surface to enclose the outer tubular surface.

16. The method of claim 8 , wherein the prepreg filament is wound on the outer tubular surface to form a seamless enclosure of the outer tubular surface, and the prepreg filament is cured so as to obtain a seamless fiber-reinforced composite shell.

17. The method of claim 8 , wherein the prepreg filament is wound on the outer tubular surface to form a tubular-shaped enclosure of the outer tubular surface, and the prepreg filament is cured so as to obtain a tubular-shaped fiber-reinforced composite shell.

18. A forming tube having a tubular shape for forming and reinforcing a concrete column, comprising:
a tubular lining made from a first material, configured to extend along an axis to terminate at first and second peripheral ends, and having:
an inner tubular surface including a plurality of ridge units displaced from one another in a direction of the axis, each of said ridge units including a plurality of ridges displaced from one another in a circumferential direction, and
an outer tubular surface opposite to said inner tubular surface in radial directions; and

a fiber-reinforced composite shell which is made from a second material different from said first material, and which is configured to enclose said outer tubular surface, wherein the tubular shape is formed by winding a prepreg filament on said outer tubular surface, followed by curing the prepreg filament.

Assignees

• Nat Applied Res Laboratories

Inventors

• Chou Chung-Che
• Lee Chung-Sheng
• Tan Hao-Hsiang
• Wu Kai-Yi

Classifications

• B29C70/32 Primary

  on a rotating mould, former or core · CPC title

• E04C5/07

  Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal (metal elements with non-structural coatings E04C5/01) · CPC title

• E04C3/34

  of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings (E04C3/36 takes precedence) · CPC title

• B29L2023/22

  Tubes or pipes, i.e. rigid (bent tubes not for use as pipe couplings B29L2023/004) · CPC title

• E04G13/021

  for circular columns · CPC title