CN101487344B - Transverse stretching method for prestressed fiber cloth reinforced concrete column - Google Patents
Transverse stretching method for prestressed fiber cloth reinforced concrete column Download PDFInfo
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- CN101487344B CN101487344B CN2009101031913A CN200910103191A CN101487344B CN 101487344 B CN101487344 B CN 101487344B CN 2009101031913 A CN2009101031913 A CN 2009101031913A CN 200910103191 A CN200910103191 A CN 200910103191A CN 101487344 B CN101487344 B CN 101487344B
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- fiber cloth
- tool holder
- bracing frame
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Abstract
The invention discloses a horizontal tensioning method of a reinforcing concrete column by prestressed fiber cloth, fiber cloth is correspondingly arranged in the areas to be reinforced on the concrete column surface along the circumferential direction, the spaces between both ends of the fiber cloth and the concrete column surface are settled, and both ends of the fiber cloth are fixedly arranged; external surfaces horizontally across the both ends of the fiber cloth are respectively provided with horizontal bearing arms; the fiber cloth is pasted on the concrete column surface and fixed directly by moving the horizontal bearing arms and coating adhesive; and the invention alters the traditional longitudinal tensioning fiber cloth to horizontal tensioning fiber cloth, and can achieve equal tensioning effect with horizontal tension which is only 1/5 to 1/7 time of longitudinal tension, which reduces the demands of tensioning equipments and technique significantly. The invention has the advantages of simple equipment, and low manufacturing cost, is convenient for transportation and carrying, has good tensioning effect for the fiber cloth receives even stress in the tensioning process; and the tensioning operation has little damage to the structure of the original concrete, the manufacturing cost can be greatly saved, the project risk is reduced, the construction period is shortened, and comprehensive benefit of technology and economy is obvious.
Description
Technical field
The invention belongs to the structural engineering field, particularly a kind of transverse stretching method of prestressed fiber cloth reinforced concrete column.
Background technology
When concrete column produces longitudinal crack owing to external influences such as supporting capacity deficiency or thermal stresseses, can paste cloth at its hoop and reinforce, the development with the constraint longitudinal crack improves its supporting capacity and application life.
Cloth (particularly carbon fiber) is owing to have excellent physics characteristic and good cementability, durability and corrosion resistance, and have advantages such as intensity is higher, volume is little, in light weight, being used widely aspect the reinforced concrete tension surface, more have superiority than other structural strengthening concrete structures.
In the prior art, usually adopt cloth is directly sticked on surface of concrete structure, technology is simple, but carbon cloth is passive stressed, only carbon cloth just works when the structure stand under load and when machine direction is extended, cloth far can not be brought into play its high-intensity advantage under normal operative condition, and is not remarkable to the inhibition effect of crack developing.
For overcoming the above problems, carbon cloth is sticked on surface of concrete structure again applying under the prestressing force condition, can effectively improve the utilization rate of cloth, the generation and the development of restriction concrete member external crack better simultaneously is beneficial to the supporting capacity that improves member and increases the service life.
In the prior art, carbon cloth is applied prestressed job practices generally adopt,, reach the purpose of stretch-draw cloth by vertically applying pulling force at the cloth two ends along the vertical tension technology of cloth.The construction equipment of this vertical tension technology and construction technology are too complicated, and the stretching force that difficult acquisition need be bigger, so that generally people all desire to avoid adopting pre-stressed fiber cloth to come reinforced concrete structure.
Therefore, the simple and convenient tensioned job practices that needs a kind of prestressed fiber cloth reinforced concrete component, can utilize less power to make cloth reach bigger vertical stretching force, simplify tensioning equipment and tensioning process, save construction cost, and reduce concrete structure to be caused new damage because the stretch-draw cloth needs.
Summary of the invention
In view of this, the transverse stretching method that the purpose of this invention is to provide a kind of prestressed fiber cloth reinforced concrete column can be executed less transverse stretching power, makes cloth reach bigger vertical stretching force, obtain required prestressing force, reach concrete column is reinforced, suppress the purpose that the concrete column longitudinal crack produces and develops better, can simplify tensioning equipment and tensioning process, save construction cost, reduce engineering risk, the reduction of erection time, have significant Technological Economy comprehensive benefit.
The transverse stretching method of prestressed fiber cloth reinforced concrete column of the present invention may further comprise the steps:
A. treat on the concrete column surface that reinforcing area is provided with cloth along the hoop correspondence, described cloth both ends are set spacing all and between the concrete column surface and are fixedly installed;
B. the external surface that laterally strides across the cloth both ends is provided with the lateral bearing beam respectively;
C. treat reinforcing area on the concrete column surface or/and cloth inner surface coating cementing agent;
D. two lateral bearing beams are applied power and move it, laterally compressing and drawing of fiber cloth stick on the surface that concrete column is treated reinforcing area;
E. the cloth both ends directly are fixedly installed on the concrete column surface.
Further, among the step a, described cloth is vertically tightened; Among the step e, the cloth end directly is fixedly installed on the concrete column surface by length more than or equal to the fixture of cloth width, fixture comprises fixture base and fixture cover plate, described fixture base laterally is anchored at the concrete column soffit, and the fixture cover plate compresses cloth by bolt and is fixed in the fixture base;
Further, among the step a, described cloth end realizes fixedly installing by bracing frame; Also comprise tool holder and connecting rod, one end of described connecting rod is hinged with respect to bracing frame, the other end is connected with the tool holder of length more than or equal to the cloth width, comprise tool holder top and tool holder bottom, described tool holder top and tool holder bottom clamp the cloth end by bolt; Bracing frame withstands the post surface;
Further, also comprise the tension rod that fixedly installs, described tension rod is provided with external screw thread and passes the lateral bearing beam, drives the lateral bearing beam by the tensioning nut that is spun on the external screw thread; Make the cloth tension and press close to the concrete column surface gradually;
Further, among the step a, be with keeper on the support frame as described above, described keeper presses closer on bracing frame by the screw that radially passes the keeper wall and fixes, and by unscrewing and screw screw, regulates the position of keeper on bracing frame; Described rod hinge connection is on keeper;
Further, described lateral bearing beam is a rod shaped structure, and the bar section outside of described rod shaped structure stretch-draw cloth is with the rolling sleeve;
Further, described fixture base and fixture cover plate facing surfaces scribble bonding agent; Described tool holder top and tool holder bottom facing surfaces fixedly install plastic layer respectively, and described plastic layer surface is provided with vertical serration ripple struction;
Further, the cross section of described concrete column is circular, and support frame as described above comprises also and the curved support of the suitable shape in concrete column surface that bracing frame withstands on the concrete column surface by curved support; Support frame as described above is two, and along axially being set up in parallel on concrete column of concrete column, described cloth surrounds concrete column and treats that latter two end of reinforcing area is connected with two connecting rods by a tool holder respectively, and described two connecting rods are set up in parallel along the tool holder length direction; Connect by two cross bars between the keeper on two bracing frames, two cross bars are arranged on the corresponding keeper of the connecting rod both sides with the both ends of cloth, and connecting rod is hinged on the keeper by the cross bar corresponding with it;
Fixedly install a tension rod on each bracing frame, two tension rods are arranged at the cloth both sides vertically, and the tension rod two ends are extended respectively and passed two lateral bearing beam end; Tensioning nut is set to ball head structure with the end that the lateral bearing beam cooperates, the ball recess that the setting of lateral bearing beam cooperates with ball head structure; Further, the cross section of described concrete column is a rectangle, and support frame as described above comprises also and the right angle bearing of the suitable shape in concrete column right angle that bracing frame withstands on the concrete column right-angled surface by the right angle bearing; Support frame as described above is two groups that the diagonal angle is provided with, and every group is that two bracing frames axially are set up in parallel along concrete column, connects by cross bar between the keeper on every group of two bracing frame; Two cloth surround concrete column and treat reinforcing area, and two ends of every cloth connect two connecting rods by a tool holder respectively; The connecting rod that is connected with two ends of every cloth is hinged on the bracing frame keeper of diagonal angle setting by cross bar respectively;
Fixedly install a tension rod on each bracing frame, two tension rods are arranged at the cloth both sides vertically, and the tension rod two ends are extended respectively and passed two lateral bearing beam end;
Further, behind step e, also comprise: f. blocks the cloth between fixture and the tool holder, removal tool anchor clamps, connecting rod and bracing frame.
The invention has the beneficial effects as follows: the transverse stretching method of prestressed fiber cloth reinforced concrete column of the present invention, changing traditional vertical stretch-draw cloth is that the required horizontal tension of transverse stretching only can reach equal stretch-draw effect for indulging 1/5～1/7 of tension force, has significantly reduced tensioning equipment and technological requirement; Can more easily make cloth obtain enough big stretching force, correspondingly make concrete column obtain enough big radially compressive pre-stress, reach concrete column is reinforced, prevents that the surface longitudinal crackle from producing and the purpose of development, equipment of the present invention is simple, low cost of manufacture is easy to transport and carry, and the stretching process cloth is stressed evenly, stretch-draw is effective, and tension operation is little to former concrete structure damage; Can save construction cost greatly, reduce engineering risk, the reduction of erection time, have significant Technological Economy comprehensive benefit.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is the circular concrete column stretch-draw of the present invention pre-structure schematic diagram;
Fig. 2 is a structural representation after the circular concrete column stretch-draw of the present invention;
Fig. 3 be Fig. 1 along A to schematic diagram;
Fig. 4 be Fig. 3 along B-B to sectional view;
Fig. 5 is a tool holder structural representation of the present invention;
Fig. 6 is a fixture structural representation of the present invention;
Fig. 7 is a Rectangular Concrete post stretch-draw pre-structure schematic diagram of the present invention;
Fig. 8 is structural representation after the Rectangular Concrete post of the present invention stretch-draw;
Fig. 9 be Fig. 7 along C to schematic diagram.
The specific embodiment
Embodiment one
In the present embodiment, cloth is a carbon cloth, and the cross section of concrete column is circular.
Fig. 1 is the circular concrete column stretch-draw of the present invention pre-structure schematic diagram, Fig. 2 is a structural representation after the circular concrete column stretch-draw of the present invention, Fig. 3 be Fig. 1 along A to schematic diagram, Fig. 4 be Fig. 3 along B-B to sectional view, Fig. 5 tool holder structural representation of the present invention, Fig. 6 is a fixture structural representation of the present invention, and as shown in the figure: the transverse stretching method of the prestressed fiber cloth reinforced concrete column of present embodiment may further comprise the steps:
A. the mode of vertically tightening is adopted along the corresponding cloth of vertically tightening 2 that is provided with of hoop in the zone that reinforces with need on concrete column 1 surface, can shorten the transverse stretching distance, increases work efficiency; Cloth 2 both ends are set spacing all and between concrete column 1 surface and are fixedly installed;
In the present embodiment, the cross section of concrete column 1 is circular, bracing frame 9 also comprises the curved support 9a with 1 suitable shape of concrete column, bracing frame 9 withstands on concrete column 1 surface by curved support 9a by rubber pad 8, positioning stablity, and can protect the surface not impaired, simple in structure, save manufacturing cost, processing ease; Bracing frame 9 is two and axially is set up in parallel along concrete column 1 that cloth 2 surrounds concrete column 1 and treats that latter two end of reinforcing area is connected with 5, two connecting rods 5 of two connecting rods by a tool holder 4 respectively and is set up in parallel along tool holder 4 length directions; Connect by two cross bars 7 between the keeper 6 on two bracing frames 9, be beneficial to the bulk strength that strengthens bracing frame 9; It is corresponding with the connecting rod 5 at the both ends of cloth 2 that two cross bars 7 are arranged on keeper 6 both sides, and connecting rod 5 is hinged on the keeper 6 by the cross bar corresponding with it 7;
B. the external surface that laterally strides across cloth 2 both ends is provided with lateral bearing beam 3 respectively; In the present embodiment, described lateral bearing beam 3 is a rod shaped structure, the bar section outside of the lateral bearing beam 3 stretch-draw cloth 2 of described rod shaped structure is with rolling sleeve 31, rolling sleeve 31 directly contacts with cloth 2, lateral bearing beam 3 by rolling sleeve 31 distaff shape structures in the time of horizontal rotates the elongation frictional resistance of coordinating cloth, prevent to produce in the stretching process stress and concentrate destruction cloth 2, and make stretching process smooth and easy;
Fixedly install 11, two tension rods 11 of a tension rod on each bracing frame 9 and axially be set up in parallel in cloth 2 both sides along concrete column 1, tension rod 11 two ends are extended respectively and are passed two lateral bearing beams, 3 ends; Tension rod 11 is provided with external screw thread, pass on the external screw thread of lateral bearing beam 3 and be rotary with tensioning nut 11a, tensioning nut 11a is set to ball head structure with the end that lateral bearing beam 3 cooperates, the ball recess that the setting of lateral bearing beam cooperates with ball head structure, can adapt to the variation of tension rod and lateral bearing beam angle when carrying out stretch-draw, operate smooth and easy;
C. treat reinforcing area surface coating cementing agent 13 at concrete column 1; Certainly, also can be at cloth 2 surface coating cementing agents 13, perhaps the concrete column 1 soffit region surface and cloth 2 surfaces of bearing tensile stress all are coated with cementing agent 13, can both reach goal of the invention;
D. the tensioning nut 11a that rotates simultaneously on each tension rod applies power to lateral bearing beam 3, drives two lateral bearing beams 3 and moves to tension rod middle part, cloth 2 is stretched and sticks on the surface of concrete column 1, produces prestressing force; Adopt the force application structure of tensioning nut 11a, it is simple to have equipment, processing ease, and cost is low, is beneficial to advantages such as even control stretching force; Certainly, also can adopt application of force equipment such as jack, can both reach goal of the invention;
F. block the cloth between fixture 12 and the tool holder 4, removal tool anchor clamps 4, connecting rod 5 and bracing frame 9.
Embodiment two
In the present embodiment, the cross section of concrete column is a rectangle.
Fig. 7 is a Rectangular Concrete post stretch-draw pre-structure schematic diagram of the present invention, Fig. 8 is structural representation after the Rectangular Concrete post of the present invention stretch-draw, Fig. 9 be Fig. 7 along C to schematic diagram, as shown in the figure: the difference of present embodiment and embodiment one is: the cross section of the concrete column of present embodiment is a rectangle, the bearing of present embodiment bracing frame 9 adopts the right angle bearing 9a with the suitable shape in concrete column 1 right angle, and bracing frame 9 withstands on concrete column 1 right-angled surface by right angle bearing 9a; Bracing frame 9 is two groups of the diagonal angle setting, every group is that two bracing frames 9 axially are set up in parallel along concrete column 1, in the present embodiment, bracing frame 9 adopts the inverted triangle structure, the drift angle of inverted triangle structure connects right angle bearing 9a, dual-side is provided with a keeper 6 respectively, connects by cross bar 7 between the keeper 6 of respective side on every group of two bracing frame 9; Two cloth 2 surround concrete column 1 and treat reinforcing area, and two ends of every cloth 2 connect two connecting rods 5 by a tool holder 4 respectively; The connecting rod 5 that is connected with two ends of every cloth 2 is hinged on respectively on the keeper 6 of two bracing frames 9 that the diagonal angle is provided with, hinged by realizing with the corresponding cross bar 7 in cloth 2 ends, just, connecting rod 5 is hinged on the keeper by the relative cross bar in position with it; Adopt the job practices of two groups of bracing frames 9 and two cloth, and do not adopt a cloth, be beneficial to and prevent that cloth effect owing to the right angle in drawing process from causing stress loss;
Other structure of present embodiment and operating procedure are all identical or similar with embodiment one, and one of ordinary skill in the art in conjunction with the embodiments one, all can realize present embodiment, therefore repeat no more.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. the transverse stretching method of a prestressed fiber cloth reinforced concrete column is characterized in that: may further comprise the steps:
A. treat on the concrete column surface that reinforcing area is provided with cloth along the hoop correspondence, described cloth both ends are set spacing all and between the concrete column surface and are fixedly installed;
B. the external surface that laterally strides across the cloth both ends is provided with the lateral bearing beam respectively;
C. treat reinforcing area on the concrete column surface or/and cloth inner surface coating cementing agent;
D. two lateral bearing beams are applied power and move it, laterally compressing and drawing of fiber cloth stick on the surface that concrete column is treated reinforcing area;
E. the cloth both ends directly are fixedly installed on the concrete column surface.
2. the transverse stretching method of prestressed fiber cloth reinforced concrete column according to claim 1, it is characterized in that: among the step a, described cloth is vertically tightened; Among the step e, the cloth end directly is fixedly installed on the concrete column surface by length more than or equal to the fixture of cloth width, fixture comprises fixture base and fixture cover plate, described fixture base laterally is anchored at the concrete column soffit, and the fixture cover plate compresses cloth by bolt and is fixed in the fixture base.
3. the transverse stretching method of prestressed fiber cloth reinforced concrete column according to claim 2 is characterized in that: among the step a, described cloth end realizes fixedly installing by bracing frame; Also comprise tool holder and connecting rod, one end of described connecting rod is hinged with respect to bracing frame, the other end is connected with the tool holder of length more than or equal to the cloth width, comprise tool holder top and tool holder bottom, described tool holder top and tool holder bottom clamp the cloth end by bolt; Bracing frame withstands the post surface.
4. the transverse stretching method of prestressed fiber cloth reinforced concrete column according to claim 3, it is characterized in that: also comprise the tension rod that fixedly installs, described tension rod is provided with external screw thread and passes the lateral bearing beam, drives the lateral bearing beam by the tensioning nut that is spun on the external screw thread; Make the cloth tension and press close to the concrete column surface gradually.
5. the transverse stretching method of prestressed fiber cloth reinforced concrete column according to claim 4, it is characterized in that: among the step a, be with keeper on the support frame as described above, described keeper presses closer on bracing frame by the screw that radially passes the keeper wall and fixes, by unscrewing and screw screw, regulate the position of keeper on bracing frame; Described rod hinge connection is on keeper.
6. the transverse stretching method of prestressed fiber cloth reinforced concrete column according to claim 5, it is characterized in that: described lateral bearing beam is a rod shaped structure, the bar section outside of described rod shaped structure stretch-draw cloth is with the rolling sleeve.
7. the transverse stretching method of prestressed fiber cloth reinforced concrete column according to claim 6, it is characterized in that: described fixture base and fixture cover plate facing surfaces scribble bonding agent; Described tool holder top and tool holder bottom facing surfaces fixedly install plastic layer respectively, and described plastic layer surface is provided with vertical serration ripple struction.
8. the transverse stretching method of prestressed fiber cloth reinforced concrete column according to claim 7, it is characterized in that: the cross section of described concrete column is for circular, support frame as described above comprises also and the curved support of the suitable shape in concrete column surface that bracing frame withstands on the concrete column surface by curved support; Support frame as described above is two, and along axially being set up in parallel on concrete column of concrete column, described cloth surrounds concrete column and treats that latter two end of reinforcing area is connected with two connecting rods by a tool holder respectively, and described two connecting rods are set up in parallel along the tool holder length direction; Connect by two cross bars between the keeper on two bracing frames, two cross bars are arranged on the corresponding keeper of the connecting rod both sides with the both ends of cloth, and connecting rod is hinged on the keeper by the cross bar corresponding with it;
Fixedly install a tension rod on each bracing frame, two tension rods axially are set up in parallel in the cloth both sides along concrete column, and the tension rod two ends are extended respectively and passed two lateral bearing beam end.
9. the transverse stretching method of prestressed fiber cloth reinforced concrete column according to claim 7, it is characterized in that: the cross section of described concrete column is a rectangle, support frame as described above comprises also and the right angle bearing of the suitable shape in concrete column right angle that bracing frame withstands on the concrete column right-angled surface by the right angle bearing; Support frame as described above is two groups that the diagonal angle is provided with, and every group is that two bracing frames axially are set up in parallel along concrete column, connects by cross bar between the keeper on every group of two bracing frame; Two cloth surround concrete column and treat reinforcing area, and two ends of every cloth connect two connecting rods by a tool holder respectively; The connecting rod that is connected with two ends of every cloth is hinged on the bracing frame keeper of diagonal angle setting by cross bar respectively;
Fixedly install a tension rod on each bracing frame, two tension rods axially are set up in parallel in the cloth both sides along concrete column, and the tension rod two ends are extended respectively and passed two lateral bearing beam end; Tensioning nut is set to ball head structure with the end that the lateral bearing beam cooperates, the ball recess that the setting of lateral bearing beam cooperates with ball head structure.
10. according to Claim 8 or the transverse stretching method of 9 described prestressed fiber cloth reinforced concrete columns, it is characterized in that: behind step e, also comprise: f. blocks the cloth between fixture and the tool holder, removal tool anchor clamps, connecting rod and bracing frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101031913A CN101487344B (en) | 2009-02-16 | 2009-02-16 | Transverse stretching method for prestressed fiber cloth reinforced concrete column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101031913A CN101487344B (en) | 2009-02-16 | 2009-02-16 | Transverse stretching method for prestressed fiber cloth reinforced concrete column |
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| Publication Number | Publication Date |
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| CN101487344A CN101487344A (en) | 2009-07-22 |
| CN101487344B true CN101487344B (en) | 2010-12-01 |
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| CN2009101031913A Expired - Fee Related CN101487344B (en) | 2009-02-16 | 2009-02-16 | Transverse stretching method for prestressed fiber cloth reinforced concrete column |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701497B (en) * | 2009-10-23 | 2011-04-20 | 重庆交通大学 | Method for strengthening concrete column by pre-stressed fiber cloth |
| CN102080454B (en) * | 2010-12-02 | 2012-05-30 | 西安建筑科技大学 | Method for reinforcing pillars in buildings |
| CN102121316B (en) * | 2011-01-12 | 2012-12-12 | 北京交通大学 | Construction method for reinforcing circular structures by pre-tensioned high-strength fiber cloth |
| CN102373810B (en) * | 2011-11-22 | 2013-03-20 | 河北建筑工程学院 | Method for reinforcing wooded pillar by using prestressed basaltic fiber cloth |
| CN103790394B (en) * | 2014-02-19 | 2015-08-19 | 重庆交通大学 | Cylindrical concrete column is laid the method for prestressed carbon cloth |
| CN110332410B (en) * | 2019-07-31 | 2023-12-29 | 南方工程检测修复技术研究院 | Prestressed applying device for repairing PCCP (prestressed concrete cylinder pipe) by using non-stop externally-attached fiber cloth and using method |
| CN112681793B (en) * | 2020-12-21 | 2022-02-11 | 常州兆庚新材料有限公司 | Carbon fiber cloth's tensioning equipment |
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2009
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