CN101318352B - Pre-stress fibre restriction concrete member and construction method thereof - Google Patents
Pre-stress fibre restriction concrete member and construction method thereof Download PDFInfo
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- CN101318352B CN101318352B CN200810302300XA CN200810302300A CN101318352B CN 101318352 B CN101318352 B CN 101318352B CN 200810302300X A CN200810302300X A CN 200810302300XA CN 200810302300 A CN200810302300 A CN 200810302300A CN 101318352 B CN101318352 B CN 101318352B
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Abstract
The invention discloses a construction method for prestressed fiber restraining concrete members. In the process of manufacturing concrete members, fiber cloth is made into a cylinder at first, and then the concrete added with expansive agent is poured into the fiber cloth cylinder. The fiber cloth cylinder is propped to open by the extrusion force which is resulted from a concrete self-weight and vibration process, and the fiber cloth cylinder prevents the concrete from expanding in a reverse direction, which leads the fiber cloth cylinder to produce restraint stress to the concrete; in a concrete solidification process, the concrete continues expanding under the action of the expansive agent, which leads the fiber cloth produce restraint stress for a second time; in such a method, the prestressed fiber restraining concrete members are made. The creativity of the invention lies in that owing to adopting a structure of prestressed fiber restraining concrete members, the bearing capacity and ductility of concrete members are greatly raised; owing to adopting nonmetallic material as prestressed material, the structural cost is greatly reduced; besides, protective layers which are necessary for reinforced concrete members are saved and the problem of durability is solved once and for all.
Description
Technical field
The present invention relates to a kind of pre-stress fibre restriction concrete member and construction method, belong to the xoncrete structure technical field.
Background technology
Steel are widely used as traditional structural materials, but along with construction market constantly enlarges, resource is deficient gradually, and its price is soaring rapidly, causes infrastructure cost to increase considerably.Therefore need new material to replace.In the prior art, confined concrete has had in actual engineering widely to be used, because the effect of constraint can effectively improve concrete intensity, ductility and anti-seismic performance.High strength fibre (as carbon fiber etc.) intensity is very high, but elastic modelling quantity and steel are similar, and as constraint material, because the transversely deforming of normal condition lower member is very little, the strength of materials is not brought into play basically, and its practical application effect is very undesirable.In addition, because durability requirement, reinforced concrete structure needs thicker protective layer, and this is stressed unfavorable to structure.
Summary of the invention
The objective of the invention is to: a kind of pre-stress fibre restriction concrete member and construction method are provided, give full play to the material tensile property of high strength fibre, substitute existing reinforced concrete structure, reach the purpose of saving steel with part.Simultaneously, high strength fibre is corrosion-resistant, can improve the durability of xoncrete structure.
The construction method of pre-stress fibre restriction concrete member of the present invention, when making concrete component, earlier fiber cloth is made tubular, in the fiber cloth tube, pour into a mould the concrete that adds swelling agent then, utilize the extruding force that produces in the concrete deadweight and the process of vibrating that this fiber cloth tube is strutted, and the fiber cloth tube oppositely stops concrete expansion, thereby make the fiber cloth tube produce restraint stress to concrete, effect concrete owing to swelling agent in the concrete setting process continues to expand, make fiber cloth produce quadratic constraints stress, promptly make pre-stress fibre restriction concrete member concrete.
The construction method of above-mentioned pre-stress fibre restriction concrete member, when making concrete component, undertaken by following step:
A, elder generation roll into tube with fiber cloth, at fiber cloth overlapping brush ring epoxy resins glue;
B, make the end clamp, clamp clamped fibers cloth tube, and clamp is fixed on scaffold and has finished on the works according to the member designs position, outside the fiber cloth tube, set up steel form then;
C, build the concrete that is mixed with swelling agent in the fiber cloth tube, tamping produces pressure to the fiber cloth tube, forms one time prestressing force;
D, treat that concrete initial set recession removes steel form, the concrete in the fiber cloth tube and because the constraint of fiber cloth tube produces secondary prestress, enters duty because the effect volume of swelling agent continues to increase.
The construction method of above-mentioned pre-stress fibre restriction concrete member, in step c, the weight of in the concrete of building, adding swelling agent be in the concrete cement weight 12～20%.
The construction method of above-mentioned pre-stress fibre restriction concrete member, the weight of swelling agent be in the concrete cement weight 15%.
The construction method of above-mentioned pre-stress fibre restriction concrete member, described swelling agent are the UEA swelling agent.
The construction method of above-mentioned pre-stress fibre restriction concrete member in step b, is installed shaped steel in the fiber cloth tube.
Pre-stress fibre restriction concrete member, its structure comprise the fiber cloth tube that high strength fibre cloth rolls, and are provided with the end clamp that is used for clamped fibers cloth tube at the two ends of fiber cloth tube, are provided with the concrete that is mixed with swelling agent in the fiber cloth tube.
Above-mentioned pre-stress fibre restriction concrete member is provided with shaped steel in the fiber cloth tube.
Creativeness of the present invention is to adopt the structure of prestressing force confined concrete, outside concrete, put the fiber cloth tube, after concrete expands, the fiber cloth tube produces restraining force to concrete, member after the moulding makes full use of the mechanical property of high tensile strength fibrous material, and the characteristics of the confined concrete of combining closely, can increase substantially element bearing capacity and ductility; Adopt nonmetallic materials will reduce infrastructure cost significantly as prestressed material.And, can increase substantially work efficiency owing to, saved the course of work of reinforcing bar binding without reinforcing bar.When concrete component bears big shearing, it is also conceivable that shaped steel is set in member, become the stiffness pre-stress fibre restriction concrete member.The present invention has saved the required protective layer of reinforced concrete member simultaneously, the disposable problem that solves durability.Therefore compare with prior art, the present invention has the advantage of saving steel, improving work efficiency.
Description of drawings
Accompanying drawing 1 is the structural representation before the cast concrete in the fiber cloth tube of the present invention;
Accompanying drawing 2 is an A place enlarged drawing in the accompanying drawing 1;
Accompanying drawing 3 is the structural representation after the cast concrete in the fiber cloth tube of the present invention.
The specific embodiment
Embodiments of the invention: when making concrete component, adopt fiber cloth to make tubular earlier, obtain fiber cloth tube 1, then fiber cloth tube 1 is placed on the position of the required installation of concrete component, in fiber cloth tube 1, pour into a mould the concrete 3 that adds swelling agent again, utilize the extruding force that produces in concrete 3 deadweights and the process of vibrating that this fiber cloth tube 1 is strutted, and fiber cloth tube 1 oppositely stops the expansion of concrete 3, thereby make 1 pair of concrete of fiber cloth tube 3 produce restraint stress, treat to remove steel form 4 after concrete 3 initial sets, concrete continues to expand under the effect of swelling agent, and fiber cloth tube 1 stops the expansion of concrete 3, and then the acquisition secondary prestress, after reaching certain intensity, concrete 3 enters duty, promptly make pre-stress fibre restriction concrete member.
Its concrete work progress comprises the steps:
A, elder generation roll into tube with high strength fibre cloth, at fiber cloth overlapping brush ring epoxy resins glue, obtain fiber cloth tube 1, and its diameter and the overlapping number of plies are determined by design.
B, making end clamp 2, clamp clamped fibers cloth tube 1 sets up steel form 4 outside fiber cloth tube 1.Fiber cloth tube 1 mid portion is in relaxed state before the casting concrete, shown in Fig. 1 dotted line.
C, preparation concrete, in concrete 3, add swelling agent, swelling agent is selected the UEA swelling agent for use, its weight be in the concrete cement weight 15%, casting concrete 3 in fiber cloth tube 1, tamping, utilize the extruding force that produces in concrete 3 deadweights and the process of vibrating that this fiber cloth tube 1 is strutted, and fiber cloth tube 1 oppositely stops the expansion of concrete 3, thereby makes 1 pair of concrete of fiber cloth tube 3 produce restraint stress, forms one time prestressing force.
D, treat that concrete 3 reaches intensity recession and removes steel form 4, concrete 3 volumes in the fiber cloth tube 1 continue to increase, and because the constraint of fiber cloth tube 1 produces secondary prestress, enter duty, and structure as shown in Figure 3.
Embodiments of the invention 2:a, elder generation roll into tube with high strength fibre cloth, at fiber cloth overlapping brush ring epoxy resins glue, obtain fiber cloth tube 1, and its diameter and the overlapping number of plies are determined by design.
B, making end clamp 2, clamp clamped fibers cloth tube 1 sets up steel form 4 outside fiber cloth tube 1, shaped steel 5 is installed in the fiber cloth tube, forms the stiffness pre-stress fibre restriction concrete member, to improve the shearing that concrete component bears.
C, preparation concrete add swelling agent in concrete 3, swelling agent is selected the UEA swelling agent for use, its weight be in the concrete cement weight 20%, casting concrete 3 fiber cloth tube 1 in then, tamping to fiber cloth tube 1 generation pressure, forms one time prestressing force.
D, treat that concrete 3 reaches intensity recession and removes steel form 4, concrete 3 volumes in the fiber cloth tube 1 continue to increase, and because the constraint of fiber cloth tube 1 produces secondary prestress, enter duty.
Claims (7)
1. the construction method of a pre-stress fibre restriction concrete member, it is characterized in that: when making concrete component, earlier fiber cloth is made tubular, in the fiber cloth tube, pour into a mould the concrete that adds swelling agent then, utilize the extruding force that produces in the concrete deadweight and the process of vibrating that this fiber cloth tube is strutted, and the fiber cloth tube oppositely stops concrete expansion, thereby make the fiber cloth tube produce restraint stress to concrete, effect concrete owing to swelling agent in the concrete setting process continues to expand, make fiber cloth produce quadratic constraints stress, promptly make pre-stress fibre restriction concrete member concrete; When making concrete component, undertaken by following step:
A, elder generation roll into tube with fiber cloth, at fiber cloth overlapping brush ring epoxy resins glue;
B, make the end clamp, clamp clamped fibers cloth tube, and clamp is fixed on scaffold and has finished on the works according to the member designs position, outside the fiber cloth tube, set up steel form then;
C, build the concrete that is mixed with swelling agent in the fiber cloth tube, tamping produces pressure to the fiber cloth tube, forms one time prestressing force;
D, treat that concrete initial set recession removes steel form, the concrete in the fiber cloth tube and because the constraint of fiber cloth tube produces secondary prestress, enters duty because the effect volume of swelling agent continues to increase.
2. the construction method of pre-stress fibre restriction concrete member according to claim 1 is characterized in that: in step c, the weight of in the concrete of building, adding swelling agent be in the concrete cement weight 12～20%.
3. the construction method of pre-stress fibre restriction concrete member according to claim 3 is characterized in that: the weight of swelling agent be in the concrete cement weight 15%.
4. the construction method of pre-stress fibre restriction concrete member according to claim 3, it is characterized in that: described swelling agent is the UEA swelling agent.
5. the construction method of pre-stress fibre restriction concrete member according to claim 1 is characterized in that: in step b, in the fiber cloth tube shaped steel is installed.
6. pre-stress fibre restriction concrete member, it is characterized in that: its structure comprises the fiber cloth tube (1) that high strength fibre cloth rolls, be provided with the end clamp (2) that is used for clamped fibers cloth tube (1) at the two ends of fiber cloth tube (1), in fiber cloth tube (1), be provided with the concrete (3) that is mixed with swelling agent.
7. pre-stress fibre restriction concrete member according to claim 6 is characterized in that: be provided with shaped steel (5) in fiber cloth tube (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810302300XA CN101318352B (en) | 2008-06-24 | 2008-06-24 | Pre-stress fibre restriction concrete member and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810302300XA CN101318352B (en) | 2008-06-24 | 2008-06-24 | Pre-stress fibre restriction concrete member and construction method thereof |
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| Publication Number | Publication Date |
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| CN101318352A CN101318352A (en) | 2008-12-10 |
| CN101318352B true CN101318352B (en) | 2010-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810302300XA Expired - Fee Related CN101318352B (en) | 2008-06-24 | 2008-06-24 | Pre-stress fibre restriction concrete member and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767249A (en) * | 2012-07-06 | 2012-11-07 | 河海大学 | Fiber-reinforced concrete externally-restricted buckling-restrained supporting component and manufacturing method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106542754A (en) * | 2016-12-28 | 2017-03-29 | 山东科技大学 | A kind of mould and its using method for making carbon fiber sleeve |
| CN115772996A (en) * | 2022-12-12 | 2023-03-10 | 盐城工学院 | Construction method of formwork prefabricated assembly type RC frame structure |
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2008
- 2008-06-24 CN CN200810302300XA patent/CN101318352B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767249A (en) * | 2012-07-06 | 2012-11-07 | 河海大学 | Fiber-reinforced concrete externally-restricted buckling-restrained supporting component and manufacturing method thereof |
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| CN101318352A (en) | 2008-12-10 |
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Owner name: GUIZHOU CONSTRUCTION GROUP NO.FOUR CONSTRUCTION EN Free format text: FORMER OWNER: GUIZHOU UNIVERSITY Effective date: 20140507 |
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Effective date of registration: 20140507 Address after: 550000 No. 4, Wangcheng Road, Guiyang, Guizhou Patentee after: Guizhou Construction Engineering Group No.4 Construction Engineering Co., Ltd. Address before: 550003 Cai Jia Guan, Guizhou City, Guiyang Province Patentee before: Guizhou University |
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Granted publication date: 20101006 Termination date: 20190624 |