CN203160543U

CN203160543U - Arc-surface carbon-fiber board clamping piece

Info

Publication number: CN203160543U
Application number: CN 201320134896
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: 2013-08-28
Anticipated expiration: 2023-03-22

Abstract

The utility model discloses an arc-surface carbon-fiber board clamping piece, which is a two-piece type wedge-shaped platy clamping piece. The arc-surface carbon-fiber board clamping piece is characterized in that the upper surface of the cross section of each wedge-shaped board forming the arc-surface carbon-fiber board clamping piece is an arc surface with the convex height h of being 0.3-1mm, and the lower surface of the cross section of each wedge-shaped board is a plane; and in the direction of the longitudinal section of each wedge-shaped board, an included angle alpha between the generating line of the arc surface of the upper surface and the lower surface is 1-3 degrees. According to the utility model, when being acted by the tension along the direction of the carbon-fiber board, the arc-surface carbon-fiber board clamping piece can clamp the carbon-fiber board, the arc surface of the upper surface can fit the deformation of an anchoring plate, so that the pressing forces acting on the middle and the two sides of the clamping piece are consistent, the anchoring force also can exceed the ultimate tensile strength of the carbon-fiber board by more than 85% in use of the carbon-fiber board with the width of being more than 50mm, the problem of non-uniform stressing of an original-plane carbon-fiber board clamping piece is solved, and the high-efficiency anchoring to wide carbon-fiber boards is realized.

Description

Cambered surface carbon fiber board intermediate plate

Technical field

The utility model 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, is attached to the intensity that the concrete component surface is used for stiffener in civil construction project usually; If will be anchored in component surface behind 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 tangible 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 the wedge grip chip carbon beaverboard anchorage that adopts plane carbon fiber board intermediate plate in 2007 at this applicant, 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 about 50% of the carbon fiber board tension limit, makes the intensity of carbon fiber board not bring into play fully.

Summary of the invention

The purpose of this utility model 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 that the intensity of carbon fiber board can well be brought into play.

For addressing the above problem, the technical scheme that the utility model is taked 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 constitutes 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 utility model 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 with the plane of two intermediate plates and also with certain roof pressure power it is headed in the wedge type ground tackle; 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 subjected to along the carbon fiber board direction, make that the thrust that intermediate plate is middle and both sides are suffered is consistent, solved the problem of primary plane carbon fiber board intermediate plate unbalance stress, to realize the high efficiency anchoring to wideer carbon fiber board.

Below, technical characterictic and the beneficial effect to the cambered surface carbon fiber board intermediate plate of the utility model is further described in conjunction with the accompanying drawings and embodiments.

Description of drawings

Fig. 1～Fig. 2: the utility model cambered surface carbon fiber board clamping piece structure schematic diagram:

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 the utility model cambered surface carbon fiber board intermediate plate;

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

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

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

Among the 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 constitutes 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 the utility model cambered surface carbon fiber board intermediate plate 2 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, the contrast of subordinate list two data: the utility model cambered surface carbon fiber board intermediate plate anchored force is compared with existing plane carbon fiber board intermediate plate anchored force, and the utility model cambered surface carbon fiber board intermediate plate anchored force is greatly improved.

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

Test event	First group	Second group	The 3rd group
				Maximum stretching force	423KN	465KN	477KN
Carbon fiber board plate inner-stress value	2115MPa	2325MPa	2385MPa
				The carbon fiber board plate inner-stress value/carbon fiber board plate limiting range of stress	88%	97%	99%
Mode of failure	Carbon fiber board is dispersed	Carbon fiber board is dispersed	Carbon fiber board is dispersed

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

Test event	First group	Second group	The 3rd group
				Maximum stretching force	142KN	155KN	168KN
The carbon fiber board inner-stress value	1014MPa	1107MPa	1200MPa
				Carbon fiber board inner-stress value/carbon fiber board the limiting range of stress	42.3%	46.1%	50%
Mode of failure	Slippage	Slippage	Slippage

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

The The above results theory analysis: when upper surface is the plane carbon fiber board intermediate plate on plane when being subjected to axial force along the carbon fiber board direction, the extruding that anchor slab is subjected to the wedge shape intermediate plate can bulge into certain radian (referring to Fig. 4); The deflection of the little centre of deflection on anchor slab both sides is big, and the upper surface of the intermediate plate of this form is a plane, cause the big and middle suffered pressure of pressure of the suffered anchor slab in intermediate plate both sides little like this, there is a gap A at plane carbon fiber board intermediate plate and anchor slab middle part, can make that the thrust in the middle of the intermediate plate is not enough, carbon fiber board meeting elder generation is from the middle slippage of intermediate plate when stretching force increases gradually; The utility model cambered surface carbon fiber board intermediate plate 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 constitutes 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.