CN102477787A - Anchor device for post-tensioned prestressed fiber reinforced polymeric material rib applied to civil engineering - Google Patents
Anchor device for post-tensioned prestressed fiber reinforced polymeric material rib applied to civil engineering Download PDFInfo
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- CN102477787A CN102477787A CN2010105533983A CN201010553398A CN102477787A CN 102477787 A CN102477787 A CN 102477787A CN 2010105533983 A CN2010105533983 A CN 2010105533983A CN 201010553398 A CN201010553398 A CN 201010553398A CN 102477787 A CN102477787 A CN 102477787A
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- anchor ring
- anchor
- prestressed
- fastener
- polymeric material
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Abstract
The invention discloses an anchor device for a post-tensioned prestressed fiber reinforced polymeric material rib applied to civil engineering. The anchor device comprises an anchor ring and a wedge clip arranged in the anchor ring, wherein the outside of the anchor ring is further provided with a fastener for fixing the anchor ring which is capable of moving up and down along the fastener to a certain position; the fastener is an anchor nut which is connected with an anchor ring thread. Compared with the prior art, the anchor device is characterized in that the fastener is arranged outside the anchoring ring, when a prestressed CFRP (Carbon Fibre Reinforced Plastics) rib is tensioned, the anchor ring moves axially along the prestressed rib under the action of a tensioning jack, when the prestressed rib meets the predetermined prestressing force, the tensioning is stopped, the fastener outside the anchor ring is adjusted to anchor the anchor ring at the predetermined position so as to realize the tensioning and anchoring process of the prestressed rib. The whole process is simple and convenient to operate, and is easy for construction.
Description
Technical field
The present invention relates to a kind of strand tapered anchorage, be meant especially to be applied to civil engineering post-tensioned prestressing fiber reinforced polymeric material muscle anchor device
.
Background technology
Because carbon fiber reinforced polymeric material (CFRP) presstressed reinforcing steel is the orthotropic material; Its horizontal compressive strength and shear strength are lower; Therefore; Traditional prestressed reinforcement ground tackle will not be suitable for the anchoring that CF is a presstressed reinforcing steel; Otherwise will cause its premature failure in the anchorage zone owing to prestressing force CF is that the muscle shear strength is low, not reach the intended purposes of prestressed reinforced concrete construction, this also is one of its key factor that can not in prestressed reinforced concrete construction, be used widely at present of restriction.So will the CFRP presstressed reinforcing steel be applied to post-tensioned concrete structure, the development of ground tackle is a urgent problem.In recent years, various countries are carrying out the research and development of CFRP presstressed reinforcing steel Special ground tackle always.Basically can be divided into two big types of mechanical grip formula ground tackle and bond type anchorages according to the stressed operating principle of these ground tackles, and derive many ground tackles system thus.The anchoring that existing prestressing force strand tapered anchorage is applied to the CFRP presstressed reinforcing steel is not very ripe; Must adopt supporting special jack during stretch-draw; The ground tackle of this structure, at first stretch-draw must be adopted special jack, and tensioning process is complicated; Simultaneously, the loss of prestress that causes of presstressed reinforcing steel retraction is also bigger.
Summary of the invention
Technical problem to be solved by this invention is the deficiency to above-mentioned prior art, and provides a kind of tensioning process simple and be easy to the strand tapered anchorage of anchoring.
For solving the problems of the technologies described above; The present invention adopts following technical scheme: a kind of strand tapered anchorage that is applied to the carbon fiber reinforced polymeric material presstressed reinforcing steel; Comprise anchor ring and be arranged on the wedge shape intermediate plate in the anchor ring; Outside described anchor ring, also be provided with a securing member, this securing member is used for prolonging the anchor ring that securing member moves up and down and is fixed on a certain position.Described securing member is the anchoring nut, and this anchoring nut is threaded with anchor ring.In described intermediate plate, also be provided with a flexible metal conduit layer.The length of described flexible metal conduit layer is equal to or greater than the length of intermediate plate.Described flexible metal conduit layer is soft aluminum layer, soft zinc layer or refined lead layer.
Compared with prior art, ground tackle of the present invention has following advantage:
1, ground tackle of the present invention is provided with securing member outside anchor ring, and when stretch-draw prestressing force CF was muscle, anchor ring was in the effect decurrence presstressed reinforcing steel axially-movable of stretch-draw jack; When presstressed reinforcing steel satisfies predetermined pre-tensioning force, stop stretch-draw, regulate being arranged on the outer securing member of anchor ring; Anchor ring is anchored at preposition, realizes the stretch-draw anchor technology of presstressed reinforcing steel, whole technological operation is simple; Convenient, be easy to construction.
2, simultaneously, the securing member of ground tackle of the present invention can be selected the anchoring nut, threading on anchor ring; This external screw thread is used to connect a tension rod, and the other end of tension rod can be connected with common jack, so; After adopting ground tackle of the present invention; When presstressed reinforcing steel is realized tensioning process, need not special jack, reduced equipment cost.
3, ground tackle of the present invention is provided with soft metal layer in intermediate plate; The direct wrap carbon fiber of soft metal layer strengthens the polymeric material presstressed reinforcing steel; Intermediate plate acts directly on the soft metal layer, and indirect acts on the carbon fiber reinforced polymeric material presstressed reinforcing steel, thereby has increased the contact area between carbon fiber reinforced polymeric material presstressed reinforcing steel and the intermediate plate; Reduce contact stress, reduced the stress concentration phenomenon in addition.Prove that through test of many times the carbon fiber reinforced polymeric material presstressed reinforcing steel strand tapered anchorage formula that we develop is feasible, can be applicable to actual engineering, has prevented carbon fiber reinforced polymeric material muscle premature failure, and simple in structure.
Description of drawings
The 1st, the structural representation of ground tackle of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated:
Shown in Fig. 1, ground tackle of the present invention comprises the anchor ring 4 that is arranged on the anchor plate 6, and anchor ring 4 is cylindrical; Be processed with a round taper hole at the middle part of anchor ring 4, in this round taper hole, be provided with wedge shape intermediate plate 3, wedge shape intermediate plate 3 can be that two semicircle intermediate plates surround; Also can surround by a plurality of small semicircle clevis sheets, also be provided with a flexible metal conduit layer 2 in the inboard of intermediate plate 3, flexible metal conduit layer 2 can be soft metal layers such as soft aluminum layer, soft zinc layer or refined lead layer; The length of this flexible metal conduit layer 2 is equal to or greater than the length of intermediate plate 3, is processed with external screw thread in the outside of anchor ring 4, and anchor ring 4 is connected with an anchoring nut 5 through its outside external screw thread; When tension of prestressed tendon, anchor ring moves upward under the effect of stretch-draw jack, simultaneously; The intermediate plate anchor ring that follows up automatically clamps the Prestressed CFRP muscle, anchor ring 4 under the stretching force effect away from anchor plate 6; When presstressed reinforcing steel reaches required prestressing force; Stop stretch-draw, the external screw thread of anchoring nut 5 through anchor ring 4 is tightened on the anchor ring 4, and anchor ring 4 is fixed on the stretch-draw position; Anchoring nut 5 places on the anchor plate 6, applies prestressed purpose thereby member is reached.
Prestressed CFRP muscle strand tapered anchorage is to utilize wedge principle, intermediate plate 3 jacking anchor rings 4, under bigger lateral pressure and frictional resistance effect, clamps Prestressed CFRP muscle 1 through the stretch-draw jack.For preventing the surface of the teeth groove damage Prestressed CFRP muscle l that intermediate plate is inboard; Cause the inefficacy too early in the anchorage zone of CFRP muscle, between intermediate plate 3 and CFRP presstressed reinforcing steel 1, adopt a kind of soft metal material as transmitting medium, promptly soft metal layer 2; Increase the contact area between CFRP presstressed reinforcing steel 1 and the intermediate plate 3; Reduce contact stress, reducing prestressing force CF is the stress concentration phenomenon of muscle 1, reaches the purpose of anchoring Prestressed CFRP muscle 1.In order further to increase CF is the contact area between presstressed reinforcing steel 1 and the intermediate plate 3, the length of anchor ring 4 and intermediate plate 3 that can also extend, thus further reduce contact stress, improve anchoring strength.
Claims (1)
1. be applied to civil engineering post-tensioned prestressing fiber reinforced polymeric material muscle anchor device; Comprise anchor ring (4) and be arranged on the wedge shape intermediate plate (3) in the anchor ring (4); It is characterized in that: outside described anchor ring (4), also be provided with a securing member (5), this securing member (5) is used for prolonging the anchor ring (4) that securing member (5) moves up and down and is fixed on a certain position;
(1), described securing member (5) is an anchoring nut, this anchoring nut is threaded with anchor ring (4).;
(2), in described intermediate plate (3), also be provided with a flexible metal conduit layer (2);
(3), the length of described flexible metal conduit layer (2) is equal to or greater than the length of intermediate plate (3);
(4), described flexible metal conduit layer is soft aluminum layer, soft zinc layer or refined lead layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105533983A CN102477787A (en) | 2010-11-22 | 2010-11-22 | Anchor device for post-tensioned prestressed fiber reinforced polymeric material rib applied to civil engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105533983A CN102477787A (en) | 2010-11-22 | 2010-11-22 | Anchor device for post-tensioned prestressed fiber reinforced polymeric material rib applied to civil engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102477787A true CN102477787A (en) | 2012-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105533983A Pending CN102477787A (en) | 2010-11-22 | 2010-11-22 | Anchor device for post-tensioned prestressed fiber reinforced polymeric material rib applied to civil engineering |
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| CN (1) | CN102477787A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233955A (en) * | 2013-07-04 | 2014-12-24 | 南通大学 | Spiral friction type anchor device for fiber reinforced composite material rib pull cable |
| CN104895334A (en) * | 2015-06-15 | 2015-09-09 | 哈尔滨工业大学 | Real-time pre-stress monitoring type clip anchoring tool and anchoring tool tension method thereof |
| CN111948040A (en) * | 2020-07-07 | 2020-11-17 | 浙江求是工程检测有限公司 | Concrete strength detection method for cast-in-situ concrete floor slab |
-
2010
- 2010-11-22 CN CN2010105533983A patent/CN102477787A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233955A (en) * | 2013-07-04 | 2014-12-24 | 南通大学 | Spiral friction type anchor device for fiber reinforced composite material rib pull cable |
| CN104233955B (en) * | 2013-07-04 | 2016-04-06 | 南通大学 | For the spiral friction-type ground tackle of fiber-reinforced composite material rib drag-line |
| CN104895334A (en) * | 2015-06-15 | 2015-09-09 | 哈尔滨工业大学 | Real-time pre-stress monitoring type clip anchoring tool and anchoring tool tension method thereof |
| CN111948040A (en) * | 2020-07-07 | 2020-11-17 | 浙江求是工程检测有限公司 | Concrete strength detection method for cast-in-situ concrete floor slab |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120530 |