CN103174261A

CN103174261A - Carbon fiber board clamping piece with arc-shaped surface

Info

Publication number: CN103174261A
Application number: CN2013100946466A
Authority: CN
Inventors: 李进; 杨帆; 朱万旭; 黄颖; 朱元; 莫彩娜
Original assignee: Liuzhou OVM Machinery Co Ltd
Current assignee: Liuzhou OVM Machinery Co Ltd
Priority date: 2013-03-22
Filing date: 2013-03-22
Publication date: 2013-06-26
Anticipated expiration: 2033-03-22
Also published as: CN103174261B

Abstract

The invention provides a carbon fiber board clamping piece with an arc-shaped surface, which is a two-piece wedged-plate-shaped clamping piece. The upper surface of a cross section of each wedge-shaped plate for forming the carbon fiber board clamping piece with the arc-shaped surface is a circular-arc-shaped surface with protruding arc-shaped surface height h of 0.3-1mm; the lower surface of the cross section is a plane; and an included angle alpha between a circular-arc-shaped surface bus of the upper surface and the lower surface is 1-3 degrees in the vertical section direction of each wedge-shaped plate. When the carbon fiber board clamping piece with the arc-shaped surface disclosed by the invention suffers from pull force in the direction along a carbon fiber board, the carbon fiber board clamping piece can tightly clamp the carbon fiber board and the circular-arc-shaped surface on the surface can fit the deformation of an anchor plate, so that the pressing forces in the middle of the clamping piece and at the two sides of the clamping piece are the same; and when the carbon fiber board with the width which is more than 50mm is used, the anchoring force can exceed more than 85% of the tensile limitation of the carbon fiber board, so that the problem that the stress of an original plane carbon fiber board clamping piece is not uniform is solved, and the high-efficiency anchoring of the wider carbon fiber board is realized.

Description

Cambered surface carbon fiber board intermediate plate

Technical field

The present invention relates to a kind of carbon beaverboard anchorage accessory, particularly a kind of carbon fiber board intermediate plate.

Background technology

Carbon fiber sheet is the novel high-strength material, usually is attached to the intensity that the concrete component surface is used for stiffener in civil construction project; If will be anchored in component surface after its pre-pretensioning before pasting, flexural strength, crack resistance that can stiffener can also take full advantage of its intensity; Therefore pre-stressed carbon fiber reinforced Concrete member has than the fiber reinforced obvious advantage of common stickup.But the stretch-draw of prestressed reinforcement Technology Need and anchoring carbon fiber sheet, and sheet material has certain width, it is a very very difficult thing that the ground tackle clamping plate will evenly clamp carbon fiber board at whole width range; (notice of authorization number is: CN201198634 to have developed for this applicant the wedge grip chip carbon beaverboard anchorage that adopts plane carbon fiber board intermediate plate in 2007, referring to Fig. 5-Fig. 6), the ground tackle of this form well anchoring is not more than the carbon fiber board of 50mm; But when the width of carbon fiber board during greater than 50mm, the plane carbon fiber board intermediate plate of existing form still is difficult to evenly clamp carbon fiber board, its anchored force that can provide can only reach 50% left and right of the carbon fiber board tension limit, makes the intensity of carbon fiber board not bring into play fully.

Summary of the invention

The object of the present invention is to provide a kind of cambered surface carbon fiber board intermediate plate, the plane carbon fiber board intermediate plate that this cambered surface carbon fiber board intermediate plate is compared existing type can significantly improve anchored force, to width greater than the use of the carbon fiber board of 50mm in its anchored force also can surpass more than 85% of the carbon fiber board tension limit, make the intensity of carbon fiber board well to be brought into play.

For addressing the above problem, the technical scheme that the present invention takes is: a kind of cambered surface carbon fiber board intermediate plate, be the tabular intermediate plate of two-piece type wedge shape, the upper surface of cross section that consists of each piece clapboard of described cambered surface carbon fiber board intermediate plate is that a protuberance cambered surface height h is the arc surface of 0.3～1mm, soffit is a plane, in the longitudinal section of each piece clapboard direction, the arc surface bus of upper surface and soffit angle α are 1～3 degree.

Because its upper surface of cambered surface carbon fiber board intermediate plate of the present invention is that a slight bump height h is the high arc surface of 0.3～1mm, soffit is a plane; In the longitudinal section of each piece clapboard direction, it is the angle of 1～3 degree that the arc surface bus of upper surface and soffit have an angle α; During use, clamp carbon fiber board and with certain pressure on top surface, it headed in the wedge type ground tackle with the plane of two intermediate plates; It can clamp the distortion (referring to Fig. 3) that the arc surface of carbon fiber board and its upper surface can the match anchor slab when the pulling force that is subject to along the carbon fiber board direction, make the thrust that intermediate plate is middle and both sides are suffered consistent, solved the problem of primary plane carbon fiber board intermediate plate unbalance stress, to realize the high efficiency anchoring to wider carbon fiber board.

Below, in conjunction with the accompanying drawings and embodiments technical characterictic and the beneficial effect of the present invention's cambered surface carbon fiber board intermediate plate are further described.

Description of drawings

Fig. 1～Fig. 2: cambered surface carbon fiber board clamping piece structure schematic diagram of the present invention:

Fig. 1: front view, the left view of Fig. 2: Fig. 1;

Fig. 3: the stressed rear jaw match of the ground tackle anchor slab distortion schematic diagram that uses cambered surface carbon fiber board intermediate plate of the present invention;

Fig. 4: use between the stressed rear jaw of ground tackle of plane carbon fiber board intermediate plate and anchor slab the gap schematic diagram to occur;

Fig. 5～Fig. 6: schematic diagram after primary plane carbon fiber board intermediate plate and anchor slab assembling:

Fig. 5: the main left view of looking sectional view, Fig. 6: Fig. 5.

In figure:

The 1-anchor slab, 2-cambered surface carbon fiber board intermediate plate, 3-carbon fiber board, 4-plane carbon fiber board intermediate plate.

The specific embodiment

A kind of cambered surface carbon fiber board intermediate plate 2, be the tabular intermediate plate of two-piece type wedge shape, the upper surface of cross section that consists of each piece clapboard of described cambered surface carbon fiber board intermediate plate is that a protuberance cambered surface height h is the arc surface (referring to Fig. 2) of 0.3～1mm, soffit is a plane, in the longitudinal section of each piece clapboard direction, the arc surface bus of upper surface and soffit angle α are 1～3 degree (referring to Fig. 1).

With the plane carbon fiber board intermediate plate 4 of cambered surface carbon fiber board intermediate plate 2 of the present invention and existing form respectively the wide carbon fiber board of clamping 100mm do 3 groups of following subordinate lists one of its result of pulling test, subordinate list two, clearly show from subordinate list one, subordinate list two Data Comparisons: cambered surface carbon fiber board intermediate plate anchored force of the present invention is compared with existing plane carbon fiber board intermediate plate anchored force, and cambered surface carbon fiber board intermediate plate anchored force of the present invention is greatly improved.

Subordinate list one: the wide carbon fiber board pulling test of cambered surface carbon fiber board intermediate plate clamping 100mm of the present invention is list as a result

Annotate: the carbon fiber board limiting range of stress is 2400Mpa.

Subordinate list two: the existing wide carbon fiber board pulling test of plane form intermediate plate clamping 100mm is list as a result

Annotate: the carbon fiber board limiting range of stress is 2400MPa.

The above results theory analysis: when the upper surface plane carbon fiber board intermediate plate that is the plane was subject to axial force along the carbon fiber board direction, the extruding that anchor slab is subject to the wedge shape intermediate plate can bulge into certain radian (referring to Fig. 4); The deflection of the deflection little centre on anchor slab both sides is large, and the upper surface of the intermediate plate of this form is a plane, cause so the large and middle suffered pressure of pressure of the suffered anchor slab in intermediate plate both sides little, at plane carbon fiber board intermediate plate and gap A of anchor slab middle part existence, can make the thrust in the middle of intermediate plate inadequate, when stretching force increases gradually carbon fiber board can be first from the middle slippage of intermediate plate; Cambered surface carbon fiber board intermediate plate of the present invention changes the upper surface of intermediate plate into cambered surface by the plane, distortion (referring to Fig. 3) with the match anchor slab, so just make cambered surface carbon fiber board intermediate plate middle consistent with the thrust on both sides, to width greater than the use of the carbon fiber board of 50mm in its anchored force also can surpass more than 85% of the carbon fiber board tension limit, can significantly improve ground tackle to the chucking power of carbon fiber board.

Claims

1. cambered surface carbon fiber board intermediate plate, be the tabular intermediate plate of two-piece type wedge shape, it is characterized in that: the upper surface of cross section that consists of each piece clapboard of described cambered surface carbon fiber board intermediate plate is that a protuberance cambered surface height h is the arc surface of 0.3～1mm, soffit is a plane, in the longitudinal section of each piece clapboard direction, the arc surface bus of upper surface and soffit angle α are 1～3 degree.