CN100436740C - Prestressed tensioning device for fiber board - Google Patents

Prestressed tensioning device for fiber board Download PDF

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Publication number
CN100436740C
CN100436740C CNB2005100317027A CN200510031702A CN100436740C CN 100436740 C CN100436740 C CN 100436740C CN B2005100317027 A CNB2005100317027 A CN B2005100317027A CN 200510031702 A CN200510031702 A CN 200510031702A CN 100436740 C CN100436740 C CN 100436740C
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CN
China
Prior art keywords
anchor clamps
assembly
carbon fiber
tensioning
sliding shoe
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Application number
CNB2005100317027A
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Chinese (zh)
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CN1702270A (en
Inventor
尚守平
张毛心
彭晖
李世勇
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尚守平
彭晖
张毛心
李世勇
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Application filed by 尚守平, 彭晖, 张毛心, 李世勇 filed Critical 尚守平
Priority to CNB2005100317027A priority Critical patent/CN100436740C/en
Publication of CN1702270A publication Critical patent/CN1702270A/en
Application granted granted Critical
Publication of CN100436740C publication Critical patent/CN100436740C/en

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Abstract

The present invention discloses a fiber plate prestress tensioning device for reinforcing a concrete bending member in civil engineering. The present invention is composed of two components and has a one-way tensioning form and a two-way tensioning form. The fiber plate prestress tensioning device is composed of a fixing part and a sliding part, wherein the sliding part is provided with an FRP plate grip which slides on a bolt of the fixing part under the action of the pushing of two jacks, the fixing part is provided with a direction change roll which can press an FRP plate tensioned to highest stress state to the surface of a member to be reinforced. Consequently, a base of the fiber plate prestress tensioning device can be inserted in the member to be reinforced without removing a concrete protection layer at the end part of the member to be reinforced. Effective tensioning to the carbon fiber plate can be carried out to realize the tensile deformation pretreatment to the carbon fiber (plate) reinforced plastic without bonding the FRP plate grip of the present invention in advance. The present invention can be used for prestress tensioning of carbon fiber reinforced plastic plates, plates similar to the carbon fiber reinforced plastic plates, and other fiber plates.

Description

A kind of prestressed tensioning device for fiber board

Technical field

The invention belongs to the construction equipment of reinforced concrete flexural member in a kind of civil engineering.Specifically a kind of pre-stress stretching device to fibrous plate is particularly useful for the pre-stress stretching device of carbon fibre reinforced plastic CFRP sheet material, similar carbon fiber reinforced plastic sheet material and other fibrous plate..

Background technology

For reinforcing building and members such as bridge construction concrete beam and concrete slab, the flexural strength of flexural members such as strengthened beam, plate and bending rigidity, one of technology that is adopted are to paste the carbon fiber sheet layer with enough tensile strength in the bottom surface of beam or plate.Generally all be to paste at present with non-prestressed common method of attaching, because carbon fibre reinforced plastic CFRP timber intensity very high (2000-3000MPa), can only utilize it less than 20% intensity with non-prestressed common method of attaching, this is because the modulus of elasticity of CFRP sheet material is lower by (1.4 * 10 5MPa), if utilize its high strength (>400MPa) time, concrete will produce the draw crack of broad, influence the normal use and the durability that are reinforced member.In addition, common stickup CFRP sheet material reinforced concrete flexural member is little to the rigidity increase rate, and can not make ongoing crack retraction closed.Adopt the Prestressed CFRP technology can effectively overcome above-mentioned shortcoming, increase substantially the strength and stiffness after concrete beam is reinforced.But the key of this technology is that pre-stress stretching device will be arranged, one of its difficult point is the anchor clamps and the ground tackle of tensioning equipment, is stretched to the CFRP sheet material of high-stress state and is unlikely to cut up damage CFRP sheet material (because the shearing resistance rupture strength of carbon fiber wire is lower) otherwise must bonding can effectively press from both sides anchor; Two of difficult point is that tensioning equipment should tightly overlay the CFRP sheet material that is stretched to high-stress state in being reinforced component surface and is beneficial to structure glue and pastes, and need not to cut the stretch-draw machine base embedded to reduce and highly make CFRP sheet material and be reinforced member and be close to being reinforced the component ends topping.The prestressed tensioning device for fiber board that does not also have this kind advanced person at present in the prior art.

Summary of the invention

The object of the present invention is to provide a kind of pre-stress stretching device that can be used for carbon fiber reinforced plastic sheet material, similar carbon fiber reinforced plastic sheet material and other fibrous plate, realization is carried out the stretcher strain preliminary treatment to carbon fiber (sheet material) reinforced plastic, to produce prestressing force, realize that effectively carbon fiber (sheet material) reinforced plastic layer is to the flexural strength that is reinforced member and the humidification of rigidity and crack resistance.

Technical scheme of the present invention is divided into unidirectional stretch-draw and two kinds of forms of two directions tension.

Tensioning equipment wherein is made up of standing part and slipper two large divisions, slidably is partly with a FRP plate grip, and the synchronous push by two jack acts on the screw rod of standing part and slides.The standing part of tensioning equipment is provided with vertically moving changed course roller, but this changed course roller roof pressure is stretched to the FRP sheet material of high-stress state to being reinforced component surface.

Concrete structure comprises assembly I and two parts of assembly II.

The structure of assembly I is: be provided with a crossbeam that links to each other with fixed component, fixed component is provided with a vertically moving changed course roller, the two ends of two connecting screw rods are connected with the anchor clamps sliding shoe with crossbeam respectively, the anchor clamps sliding shoe links into an integrated entity with the anchor clamps that clamp carbon fiber sheet one end, is provided with two hydraulic jack that connect same hydraulic pump between crossbeam and anchor clamps sliding shoe.When jack jacking or oil return, the anchor clamps sliding shoe moves along connecting screw rod.

When unidirectional stretch-draw, assembly II is another anchor clamps identical with the clamp structure of assembly I.Promptly form by a base plate and 1-5 piece panel.Its base plate both sides are provided with screw, can and be reinforced member by bolt and fix.

When two directions tension, be to constitute by two identical assembly I.One of them assembly I is identical with assembly I in the unidirectional stretch-draw, and another assembly I replaces the assembly II in the unidirectional stretch-draw, carries out synchronous tension by two assembly I when implementing.

Described anchor clamps are made up of a base plate and 1-5 piece panel, base plate and be provided with screw above the panel.The one side that base plate and panel are adjacent is all made lines, to guarantee the frictional force between anchor clamps and the carbon fiber sheet.Carbon fiber sheet is positioned between base plate and the panel during use, with bolt base plate and panel is pressed together, thereby clamps carbon fiber sheet.

The anchor clamps sliding shoe can be fixed from two ends by preceding split nut and back split nut.

The end that described connecting screw rod is fixedlyed connected with crossbeam is smooth connecting rod, and an end that is connected with the anchor clamps sliding shoe is a screw rod.

Technique effect of the present invention is: need not bond in advance and can carry out effective stretch-draw to carbon fiber sheet owing to have reliable clamp structure, realization is to carbon fiber (sheet material) reinforced plastic stretcher strain preliminary treatment, be pasted on and make it to form pre-stressed state after being reinforced member, it is closed to produce antiarch even crack retraction.When the member continuation load-bearing that is reinforced produces diastrophic trend, carbon fiber (sheet material) the reinforced plastic adhered layer that is in pre-stressed state just begins the tension effect of performance itself, member is realized that strength and stiffness strengthen efficiently, thereby reach the purpose of the counter-bending ability of effective reinforcement.After the concrete cover that need not to be reinforced member cuts the tensioning equipment base imbedded and be reinforced member.Go for the prestressed stretch-draw of carbon fiber reinforced plastic sheet material, similar carbon fiber reinforced plastic sheet material and other fibrous plate.

Description of drawings

Fig. 1 is the structure vertical view of embodiment 1;

Fig. 2 is the lateral view of Fig. 1.

The specific embodiment

Embodiment 1: unidirectional tensioning equipment:

Present embodiment comprises assembly I and two parts of assembly II.

The structure of assembly I is: be provided with a crossbeam 4, crossbeam 4 links to each other with fixed component 3, and fixed component 3 is provided with screw, is used for and is reinforced beam fixing.Fixed component 3 is provided with vertically moving changed course roller 12, the two ends of two connecting screw rods 5 are connected with anchor clamps sliding shoe 7 with crossbeam 4 respectively, anchor clamps sliding shoe 7 links into an integrated entity with the anchor clamps 9 that clamp carbon fiber sheet one end, and fixes from two ends by preceding split nut 6 and back split nut 8; Be provided with two hydraulic jack 13 that connect same hydraulic pump between crossbeam 4 and anchor clamps sliding shoe 7, when jack 13 jackings or oil return, anchor clamps sliding shoe 7 moves along connecting screw rod 5.

The anchor clamps of present embodiment are made up of a base plate 10 and 4 panels, base plate and be provided with screw above the panel, and the one side that base plate and panel are adjacent is all made lines, to guarantee the frictional force between anchor clamps and the carbon fiber sheet 16.Carbon fiber sheet is positioned between base plate and the panel, with bolt 11 base plate and panel is pressed together, thereby clamps carbon fiber sheet; The assembly II of present embodiment goes up another identical anchor clamps of anchor clamps 9 structures with assembly I.Promptly form by a base plate 10 and 4 panels.The base plate both sides are provided with screw, can and be reinforced member 17 by bolt and fix.

The process of stretch-draw is: carbon fiber sheet one end that will need earlier to use is being fixed on the anchor clamps 9 via changed course roller 12 bottoms and crossbeam 4 on the assembly I, the other end is fixed on the assembly II, and respectively by bolt with anchor clamps, base plate on the assembly, panel is pressed together, drive external force by the jack input then, anchor clamps sliding shoe 7 is moved along connecting screw rod 5, carbon fiber (sheet material) reinforced plastic begins by stretch-draw, when by stretch-draw during to predetermined stress state, stop input and drive external force, by preceding split nut 6 and split nut 8 positions of stationary fixture sliding shoe 7 on connecting screw rod 5, back, thereby stationary fixture 9, carbon fiber (sheet material) reinforced plastic tensile state is constant when guaranteeing jack 13 oil returns, by bolt roof pressure changed course roller 12, the component surface that carbon fiber sheet is closely attached on be reinforced can will be in by the carbon fiber of tensile state (sheet material) reinforced plastic and be pasted on the member that is reinforced.

Embodiment 2: the two directions tension device

Present embodiment is made up of two assembly I, and one of them assembly I is identical with assembly I among the embodiment 1, and another assembly I replaces the assembly II among the embodiment 1, carries out synchronous tension by two assembly I when implementing.

Claims (5)

1. prestressed tensioning device for fiber board, comprise two parts of assembly I and assembly II, it is characterized in that, the structure of assembly I is: be provided with a crossbeam that links to each other with fixed component, fixed component is provided with vertically moving changed course roller, the two ends of two connecting screw rods are connected with the anchor clamps sliding shoe with crossbeam respectively, the anchor clamps sliding shoe links into an integrated entity with the anchor clamps that clamp carbon fiber sheet one end, be provided with two hydraulic jack that connect same hydraulic pump between crossbeam and anchor clamps sliding shoe, assembly II is another anchor clamps identical with the clamp structure of assembly I.
2. prestressed tensioning device for fiber board, comprise two identical assembly I, it is characterized in that, the structure of assembly I is: be provided with a crossbeam that links to each other with fixed component, fixed component is provided with vertically moving changed course roller, the two ends of two connecting screw rods are connected with the anchor clamps sliding shoe with crossbeam respectively, and the anchor clamps sliding shoe links into an integrated entity with the anchor clamps that clamp carbon fiber sheet one end, are provided with two hydraulic jack that connect same hydraulic pump between crossbeam and anchor clamps sliding shoe.
3. tensioning equipment according to claim 1 and 2 is characterized in that anchor clamps are made up of a base plate and 1-5 piece panel, and the one side that base plate and panel are adjacent is all made lines, base plate and be provided with the screw that is used for fixing above the panel.
4. tensioning equipment according to claim 1 and 2, it is characterized in that the anchor clamps sliding shoe by preceding split nut and the back split nut fix from two ends.
5. tensioning equipment according to claim 1 and 2 is characterized in that the end that connecting screw rod is connected with crossbeam is smooth connecting rod, and an end that is connected with the anchor clamps sliding shoe is a screw rod.
CNB2005100317027A 2005-06-15 2005-06-15 Prestressed tensioning device for fiber board CN100436740C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2005100317027A CN100436740C (en) 2005-06-15 2005-06-15 Prestressed tensioning device for fiber board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2005100317027A CN100436740C (en) 2005-06-15 2005-06-15 Prestressed tensioning device for fiber board

Publications (2)

Publication Number Publication Date
CN1702270A CN1702270A (en) 2005-11-30
CN100436740C true CN100436740C (en) 2008-11-26

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101942885A (en) * 2010-09-16 2011-01-12 南京林业大学 A kind of FRP-bamboo-concrete combination beam
CN102322152B (en) * 2011-09-29 2013-04-17 重庆大学 Prestressed carbon fiber board tensioning system and tension reinforcing method
CN103469737A (en) * 2013-07-31 2013-12-25 尚守平 Method for reinforcing concrete bending member by using variable-bonding prestress carbon fiber plate
CN103741954A (en) * 2013-12-21 2014-04-23 广西科技大学 Carbon fiber plate stretching drawing support
CN104005343B (en) * 2014-06-13 2015-12-02 成都市磐固科技有限公司 A kind of bridge prestress carbon fiber board tension anchor system device
CN104153584A (en) * 2014-08-22 2014-11-19 中国铁道科学研究院铁道建筑研究所 Tensioned anchorage device and using method of tensioned anchorage device
CN105699190B (en) * 2016-04-13 2018-07-03 桂林理工大学 A kind of experimental rig for testing FRP cloth stress relaxation
CN106522574B (en) * 2016-11-23 2018-11-30 深圳市威士邦建筑新材料科技有限公司 A kind of breakdown pre-stressed carbon fiber tensioning equipment and its construction method
CN108823383A (en) * 2018-07-09 2018-11-16 西北工业大学 Improve the prestress application device of thin-wall part milling stability

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06272384A (en) * 1993-03-24 1994-09-27 Times Eng:Kk Anchoring structure for tension material
JPH07317216A (en) * 1994-05-23 1995-12-05 Kowa Kasei Kk Prestress concrete fixture sleeve and manufacture of sleeve
CN2499469Y (en) * 2001-09-29 2002-07-10 深圳市海川实业股份有限公司 Non-metal prestress rib material anchor
CN2576837Y (en) * 2002-09-04 2003-10-01 柳州海威姆建筑机械有限公司 Carbon-fier prestressed reinforcement anchoring apparatus
CN2806645Y (en) * 2005-06-15 2006-08-16 尚守平 Prestressed stretching device for fiber boards

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06272384A (en) * 1993-03-24 1994-09-27 Times Eng:Kk Anchoring structure for tension material
JPH07317216A (en) * 1994-05-23 1995-12-05 Kowa Kasei Kk Prestress concrete fixture sleeve and manufacture of sleeve
CN2499469Y (en) * 2001-09-29 2002-07-10 深圳市海川实业股份有限公司 Non-metal prestress rib material anchor
CN2576837Y (en) * 2002-09-04 2003-10-01 柳州海威姆建筑机械有限公司 Carbon-fier prestressed reinforcement anchoring apparatus
CN2806645Y (en) * 2005-06-15 2006-08-16 尚守平 Prestressed stretching device for fiber boards

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