CN2573773Y

CN2573773Y - Prestressed FRP reinforcement sheet fastening body device

Info

Publication number: CN2573773Y
Application number: CN 02242611
Authority: CN
Inventors: 吕志涛; 张继文; 谢正元; 关炳良; 孟少平
Original assignee: LIUZHOU CONSTRUCTION MACHINERY FACTORY GENERAL; Southeast University
Current assignee: LIUZHOU CONSTRUCTION MACHINERY FACTORY GENERAL; Southeast University
Priority date: 2002-07-19
Filing date: 2002-07-19
Publication date: 2003-09-17
Anticipated expiration: 2012-07-19

Abstract

The utility model relates to a prestressed FRP reinforcement clamping sheet anchoring body device which comprises a prestressed reinforcement, an anchor plate, a clamping sheet and an anchor ring, wherein, the prestressed reinforcement comprises a prestressed carbon fiber reinforcement, an aramid fiber reinforcement, a glass fiber reinforcement and a prestressed non-metal fiber reinforcement which belongs to the class of a PBO fiber reinforcement, wherein, the carbon fiber reinforcement can be a single non-smooth reinforcement which is provided with screw threads on the single non-smooth reinforcement and a rugged surface and can also be a carbon fiber cord which is formed by the twisted winding of seven fine carbon fiber reinforcements with diameters of 1.5 to 5 mm. The FRP reinforcement can be also wound with carbon fiber threads, and the length of the clamping sheet 5 is about 1.5 times of the length of a common clamping sheet; an inner tooth forms a circular arc shape, and the small end of the clamping sheet is extended into a circular hole of the anchor plate 3. The prestressed FRP reinforcement of the utility model has the advantages of excellent climate resisting property, good anticorrosion property and little possibility of rustiness generation, and the surface of the inner tooth of the clamping sheet is coated with purpose-made glue spreading; the prestressed FRP reinforcement is not contacted with air, so the utility model also has the advantages of further enhancing the anticorrosion property, extending the length of the clamping sheet, lengthening the length of anchoring sections, increasing anchoring stability and having smaller product external dimensions and weight, low cost and convenient construction.

Description

Pre-stress FRP muscle intermediate plate anchoring body device

One, technical field:

The utility model relates to a kind of anchor, particularly a kind of prestressed tendon intermediate plate anchor.

Two, background technique:

Existing prestressed tendon intermediate plate anchor is as shown in Figure 3: this anchor is made up of common prestress wire 7, anchor plate 8, anchor ring 10 and intermediate plate 9; Intermediate plate clamping steel strand, male cone (strobilus masculinus) by intermediate plate matches with the internal taper hole of anchor ring, and is stressed when taper hole small end direction is moved when steel strand, drives the intermediate plate follow-up, thereby make intermediate plate produce a very big chucking power to steel strand, steel strand anchor in the anchor ring taper hole is tight.The deficiency that this technology exists is:

One: steel strand hardness is higher, and the intermediate plate thread form is thinner triangle, and the intermediate plate tooth directly contacts with steel strand, when stressed, may pull the intermediate plate thread form, causes the stripped thread phenomenon;

Its two: the steel strand antiseptic property is relatively poor, especially in interlock place of intermediate plate and steel strand, easily produces corrosion, influences the life-span of steel strand;

Its three: the weight of steel strand is bigger, on a large amount of engineerings such as bridge of using drag-lines, will increase the weight of drag-line and the deadweight of bridge greatly, makes troubles for design and construction;

Its four: whole anchor size is relatively large, and for ground tackle is installed outside member, exposed parts is also bigger, thereby causes the overall dimensions of member bigger, and engineering cost improves; Ground tackle is installed in member, can be to a certain degree weakened the intensity of node, particularly reduce shock strength.

Three, summary of the invention:

The technical problems to be solved in the utility model is: the intermediate plate tooth directly contacts with steel strand in the pre existing stress rib intermediate plate anchor, may pull the intermediate plate thread form when stressed, causes the stripped thread phenomenon; In interlock place of intermediate plate and steel strand, easily produce corrosion, influence the life-span of steel strand; The volume of steel strand is big, weight is heavier, whole anchor size is relatively large, the problem of construction inconvenience and the more high aspect of engineering cost, provide a kind of antiseptic property, stressing conditions of product to improve, the security and stability of life of product, engineering improves, the boundary dimension and the weight of product are littler, and cost is low, the intermediate plate anchor of easy construction.

The technological scheme of dealing with problems is: 1. use prestressing force non-metallic fiber muscle---be called pre-stress FRP muscle, particularly carbon fibre bar or rope again and replace common prestress wire; 2. tooth surface is coated special gluing in intermediate plate, 3. with intermediate plate length lengthening, 4. changes tooth in the intermediate plate into circular arc.

Its concrete structure is: a kind of pre-stress FRP muscle intermediate plate anchoring body device, comprise prestressed tendon, anchor plate, intermediate plate and anchor ring, prestressed tendon is anchored on anchor ring and the anchor plate by intermediate plate, it is characterized in that: described prestressed tendon is a prestressing force non-metallic fiber muscle---be the pre-stress FRP muscle, this non-metallic fiber muscle comprises carbon fibre bar, aramid fiber reinforced plastic bars, glass fibre muscle, pbo fiber muscle.

Described carbon fibre bar can be single non-smooth gluten, above have screw thread, surface to be uneven, also can be around the carbon fiber rope that forms by 7 diameters fine carbon fibre muscle strand that is 1.5～5mm; Described intermediate plate length is that 1.2～1.8 times of common intermediate plate length, interior tooth are circular arc, and the small end of this intermediate plate puts in the circular hole of anchor plate.

As a kind of conversion of the present utility model, tooth surface scribbles special gluing in the described intermediate plate, and this special gluing is the modified epoxy with toughness reinforcing, fast hard, enhancing, anti-aging function.

During use, male cone (strobilus masculinus) by intermediate plate matches with the internal taper hole of anchor ring, when pre-stress FRP muscle, carbon fibre bar or Suo Shouli when taper hole small end direction is moved, the follow-up of drive intermediate plate, intermediate plate is bitten pre-stress FRP muscle, carbon fibre bar or rope, and push special gluing, thus pre-stress FRP muscle, carbon fibre bar or rope are produced a very big chucking power, carbon fibre bar or rope anchor in the anchor ring taper hole is tight.Its major advantage is:

1. prestressing force non-metallic fiber muscle---be that pre-stress FRP muscle weatherability excellent, antiseptic property are good, be difficult for the generation corrosion, long service life is used for the coastal area engineering or the ocean engineering effect is more outstanding;

2. tooth surface scribbles special gluing in the intermediate plate, and the non-metallic fiber muscle does not contact with air, further strengthens antiseptic property;

3. pbo fiber muscle, carbon fibre bar or carbon fiber rope, aramid fiber reinforced plastic bars Young's modulus height, relatively more responsive to stress deformation, thereby the load that the overwhelming majority is added on the member can both affact on carbon fibre bar or the carbon fiber rope, reduced the burden of member, increase the security and stability of member, improved the bulk life time of member;

4. pbo fiber muscle, carbon fibre bar or carbon fiber rope intensity height, in light weight can reduce the deadweight of member widely; Anti-fatigue performance is good, can improve the security and stability of member;

5. carbon fibre bar or carbon fiber rope, aramid fiber reinforced plastic bars flexural rigidity are low, and better softness is easy to reel, are convenient to the carrying of long rope and set up.

6. intermediate plate length extends, and anchoring section length extends, and has increased the stability and the reliability of anchoring;

7. tooth adopts the circular arc thread form in the intermediate plate, and the tooth stress was concentrated and pulled thread form in both can having avoided, and can avoid scratch carbon fibre bar or rope surface again;

8. whole anchor size is less, and the headspace that is used to install ground tackle on the member also can be less, thereby can reduce the size of member to a certain extent, reduces engineering cost, saves cost.

Four, description of drawings:

Fig. 1: the utility model embodiment two pre-stress FRP muscle intermediate plate anchoring body apparatus structure schematic representation;

Fig. 2: the utility model embodiment one pre-stress FRP muscle intermediate plate anchoring body apparatus structure schematic representation;

Fig. 3: existing pre-stress FRP muscle intermediate plate anchoring body apparatus structure schematic representation.

Five: embodiment:

Embodiment one:

A kind of pre-stress FRP muscle intermediate plate anchoring body device, comprise prestressed tendon 1, anchor plate 3, intermediate plate 5 and anchor ring 6, prestressed tendon 1 is anchored on anchor ring 6 and the anchor plate 3 by intermediate plate 5, described prestressed tendon 1 is the pre-stressed carbon fiber muscle, this carbon fibre bar can be single non-smooth gluten, screw thread is arranged above, the surface is uneven, also can be wound with carbon fiber wire on it, also can be to twist around the carbon fiber rope that forms by the fine carbon fibre muscle that 7 diameters are 1.5～5mm, described intermediate plate length is 1.2～1.8 times of common intermediate plate length, interior tooth is a circular arc, and the small end of this intermediate plate puts in the circular hole of anchor plate 3.

A kind of conversion as the utility model embodiment, described prestressed tendon 1 can also be prestressing force aramid fiber reinforced plastic bars-abbreviation AFRP muscle, glass fibre muscle-abbreviation GFRP muscle, pbo fiber muscle and so on prestressing force non-metallic fiber muscle---be the FRP muscle, also can be wound with carbon fiber wire on the various FRP muscle, also can not twine.

Embodiment two:

A kind of pre-stress FRP muscle intermediate plate anchoring body device, its basic structure is with embodiment one, institute's difference is: tooth surfaces scribble special gluing 4 in the described intermediate plate 5, and described special gluing 4 is the modified epoxies with toughness reinforcing, fast hard, enhancing, anti-aging function.

In the various embodiments described above, carbon fibre bar or rope are a kind of novel metalloid fiber muscle materials, and it is by resin material---for example modified epoxy and carbon fiber wire pass through the composite material that special process is produced.

In the various embodiments described above, described anchor ring is meant single prestressed tendon ground tackle, then is anchor slab for the many described anchor rings of prestressed tendon ground tackle.

Claims

1, a kind of pre-stress FRP muscle intermediate plate anchoring body device, comprise prestressed tendon (1), anchor plate (3), intermediate plate (5) and anchor ring (6), prestressed tendon is anchored on anchor ring and the anchor plate by intermediate plate, it is characterized in that: described prestressed tendon (1) is a prestressing force non-metallic fiber muscle---be the pre-stress FRP muscle, this non-metallic fiber muscle comprises carbon fibre bar, aramid fiber reinforced plastic bars, the glass fibre muscle, the pbo fiber muscle, described intermediate plate (5) length is that 1.2～1.8 times of common intermediate plate length, interior tooth are circular arc, and the small end of this intermediate plate puts in the circular hole of anchor plate (3).

2, pre-stress FRP muscle intermediate plate anchoring body device as claimed in claim 1, it is characterized in that: described prestressed tendon (1) is carbon fibre bar-abbreviation CFRP muscle, this carbon fibre bar can be single non-smooth gluten, above have screw thread, surface to be uneven, also can be around the carbon fiber rope that forms or claim the carbon fiber twisted wire by 7 diameters fine carbon fibre muscle strand that is 1.5～5mm.

3, pre-stress FRP muscle intermediate plate anchoring body device as claimed in claim 1, it is characterized in that: described prestressed tendon (1) is the FRP muscle that is wound with carbon fiber wire (2) on it.

4, as claim 1 or 2 or 3 described pre-stress FRP muscle intermediate plate anchoring body devices, it is characterized in that: the interior tooth surface of described intermediate plate (5) scribbles special gluing (4).

5, pre-stress FRP muscle intermediate plate anchoring body device as claimed in claim 4, it is characterized in that: the special gluing that the interior tooth surface of described intermediate plate (5) scribbles is a modified epoxy.