CN105178515A - Built-in anchorage type prestress FRP rib tensioning and anchoring device - Google Patents
Built-in anchorage type prestress FRP rib tensioning and anchoring device Download PDFInfo
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- CN105178515A CN105178515A CN201510550628.3A CN201510550628A CN105178515A CN 105178515 A CN105178515 A CN 105178515A CN 201510550628 A CN201510550628 A CN 201510550628A CN 105178515 A CN105178515 A CN 105178515A
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- anchor ring
- frp
- steel sleeve
- circular anchor
- screw rod
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Abstract
The invention relates to a built-in anchorage type prestress FRP rib tensioning and anchoring device. The device comprises prestress FRP ribs, binding materials, steel sleeves, a screw rod, a nut, an annular steel washer and a circular anchor ring, wherein the two ends of the prestress FRP ribs are respectively inserted in opening ends of the steel sleeves at a tensioning end and an anchoring end, and are fixed by the binding materials; a closing end of the steel sleeve at the tensioning end is welded with a section of screw rod; the screw rod penetrates through the ring wall of the circular anchor ring at the tensioning end; the annular steel washer and the nut matched with the screw rod are mounted in the circular anchor ring; and a closing end of the steel sleeve at the anchor end penetrates through the ring wall of the circular anchor ring at the anchoring end, and is welded with the circular anchor ring. The device is suitable for FRP rib materials with various materials and various section forms, is simple in structure, low in cost and convenient for construction, and can be applied to concrete structural components built and reinforced by a prestress FRP rib technology.
Description
Technical field
The present invention relates to a kind of built-in ground tackle formula pre-stress FRP bar stretching and anchoring device.
Background technology
In recent years, FRP muscle material is because having the outstanding advantages such as high-strength light, corrosion-resistant and antifatigue and being applied in Practical Project more and more widely.Compared to non-prestressed FRP muscle, the low shortcoming of the high-strength performance utilization rate of the former FRP material not only can be overcome when adopting prestressed FRP rebar construction or reinforced concrete structure component, and very positive effect is had in the generation of prevention FRP stripping damage, the rigidity improving component and cracking load etc., therefore prestressed FRP rebar technology has more wide application prospect.
But at present when adopting similar traditional clamping reinforcing bar formula stretching and anchoring device to FRP muscle Shi Hanzhang, because FRP muscle is a kind of anisotropic material, its Transverse Shear Strength is well below endwise tensile strength, the phenomenon of the FRP muscle entirety fracture of therefore concentrating position often easily to occur to be caused by cutting off because of part FRP fibre at stretching end or anchored end iso-stress, thus effective prestressing force cannot be applied to FRP muscle.The on the other hand most complex structure of existing FRP bar stretching and anchoring device and need be placed on component ends, is thus difficult to use in the hogging moment region of the component such as reinforced concrete continuous beam, plate.This is external generally needs by Large Hydraulic Equipment during FRP muscle Shi Hanzhang, complicated construction technique and costly.The existence of these problems governs development and the application of prestressed FRP rebar technology.
Summary of the invention
For solving Problems existing in the rib prestressed applying scheme of above-mentioned FRP, the object of this invention is to provide a kind of built-in ground tackle formula pre-stress FRP bar stretching and anchoring device, can effectively prevent FRP muscle from laterally being cut off in Shi Hanzhang process, again by easy manual manipulation mode Shi Hanzhang, and the built-in ground tackle formula FRP bar stretching and anchoring device be all suitable in component positive and negative moment of flexure region.
For achieving the above object, it is as follows that the present invention solves the problems of the technologies described above taked technical scheme:
A kind of built-in ground tackle formula pre-stress FRP bar stretching and anchoring device, comprise prestressed FRP rebar, binding material, steel sleeve, screw rod, nut, annular steel plate washer and circular anchor ring, the openend of the steel sleeve being positioned at stretching end and anchored end place is inserted at the two ends of described prestressed FRP rebar respectively, and fix with binding material, one section of screw rod is welded at the blind end of the steel sleeve at stretching end place, make screw rod pass the ring wall of the circular anchor ring of stretching end, and in circular anchor ring, the annular steel plate washer supporting with screw rod and nut are installed; By the ring wall of the blind end of the steel sleeve of anchored end through the circular anchor ring of anchored end, and be connected together with doughnut boxing.
Steel sleeve at stretching end place welds a gate-type steel disc in advance to limit the rotation of steel sleeve near the end of screw rod.
Described prestressed FRP rebar adopts carbon fibre bar, aramid fiber reinforced plastic bars or glass fiber-reinforced polymer, and its cross sectional shape is circular, rectangle or square; Or adopt FRP plate bar to replace prestressed FRP rebar; The sandblasting of prestressed FRP rebar surface or Ginding process are processed to the adhesion stress strengthened between prestressed FRP rebar and binding material.
Described binding material can select cementing agent of different nature according to the difference of FRP muscle, as acrylic resin, epoxy resin etc., and can add curing compound, flexibilizer etc. wherein and improves adhesive property.
Described steel sleeve inside is processed with screw thread, and is processed in inside, openend the rim of a cup shape shunk to port.Effectively can increase the interlocking between itself and binding material, guarantee that prestressing force can pass to prestressed FRP rebar by binding material by steel sleeve.The length of steel sleeve can require to be adjusted according to different stress distributions.
Described circular anchor ring has certain thickness, generally gets 7 ~ 11mm, can provide enough rigidity as prestressing force load-carrying construction; Circular anchor ring has certain diameter, desirable 76mm, and the operation for spanner tightening nut provides enough spaces; Height and its buried depth of circular anchor ring adapt, and generally get 20 ~ 30mm.The impact that stress when circular anchor ring can also reduce Shi Hanzhang to greatest extent suffered by anchor ring place concrete is concentrated.
Compared with prior art, tool has the following advantages in the present invention:
The present invention by prestress application on steel sleeve, utilizing between steel sleeve and FRP muscle bonds reliably passes to FRP muscle by prestressing force, jointly stressed both during stretch-draw, thus the FRP muscle caused because its Transverse Shear Strength is not enough when effectively prevent traditional direct clamping FRP muscle Shi Hanzhang is by the phenomenon of cutting off.
Utilize spanner rotating nut to carry out stretching screw in the present invention and just can manually realize prestressed applying, whole process is without the need to using hydraulic tensioning machinery, simple to operate and action required space is little, is particularly suitable for carrying out of field operation.
In the present invention, ground tackle is a pair anchor ring, simple structure, can embed neatly in the concrete of component corresponding site according to the design attitude of prestressed FRP rebar, efficiently solve the difficulty at component hogging moment area Shi Hanzhang, reach the object that positive and negative moment of flexure region is all suitable for.
In addition, pre-stress FRP bar stretching and anchoring device of the present invention is applicable to the FRP muscle material of various material and various section form, and simple structure, cost are low, easy construction, can be used in the concrete structure member of the construction of all kinds of employing prestressed FRP rebar technology and reinforcing.
Accompanying drawing explanation
Fig. 1 is pre-stress FRP bar stretching and anchoring device overall structure schematic diagram of the present invention.
Fig. 2 is the structural representation of stretching end of the present invention.
Fig. 3 is stretching end of the present invention welding gate-type steel disc place schematic cross-section.
Fig. 4 is the structural representation of anchored end of the present invention.
Fig. 5 is steel sleeve rim of a cup place of the present invention schematic cross-section.
Fig. 6 is the floor map that pre-stress FRP bar stretching and anchoring device of the present invention embeds in concrete component.
Fig. 7 is the stretching and anchoring device overall structure schematic diagram of the present invention when being furnished with two prestressed FRP rebar.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
embodiment one:
As Fig. 1, Fig. 2, Fig. 4, shown in Fig. 6, a kind of built-in ground tackle formula pre-stress FRP bar stretching and anchoring device, comprise prestressed FRP rebar 1, binding material 2, steel sleeve 3, screw rod 4, nut 5, annular steel plate washer 6 and circular anchor ring 7, the openend of the steel sleeve 3 being positioned at stretching end and anchored end place is inserted at the two ends of described prestressed FRP rebar 1 respectively, and fix with binding material 2, one section of screw rod 4 is welded at the blind end of the steel sleeve 3 at stretching end place, make screw rod 4 through the ring wall of the circular anchor ring 7 of stretching end, and in circular anchor ring 7, the annular steel plate washer 6 supporting with screw rod 4 and nut 5 are installed, by the ring wall of the blind end of the steel sleeve 3 of anchored end through the circular anchor ring 7 of anchored end, and weld together with circular anchor ring 7.
As shown in figures 1 and 3, the steel sleeve 3 at stretching end place welds a gate-type steel disc 8 in advance to limit the rotation of steel sleeve 3 near the end of screw rod 4.
Described prestressed FRP rebar 1 adopts carbon fibre bar, aramid fiber reinforced plastic bars or glass fiber-reinforced polymer, and its cross sectional shape is circular, rectangle or square; Or adopt FRP plate bar to replace prestressed FRP rebar 1; Process to strengthen the adhesion stress between prestressed FRP rebar 1 and binding material 2 to prestressed FRP rebar 1 surface sandblasting or Ginding process.
Described binding material 2 selects acrylic resin, epoxy resin, or in binding material 2, adds curing compound, flexibilizer to improve adhesive property.
As shown in Figure 5, described steel sleeve 3 inside is processed with screw thread, and is processed in inside, openend the rim of a cup shape shunk to port.
Described circular anchor ring 7 has certain thickness, generally gets 7 ~ 11mm, can provide enough rigidity as prestressing force load-carrying construction; Circular anchor ring 7 has certain diameter, desirable 76mm, and the operation for spanner tightening nut 5 provides enough spaces; Height and its buried depth of circular anchor ring 7 adapt, and generally get 20 ~ 30mm.
The manufacturing process of apparatus of the present invention is as follows:
1) two threaded steel sleeves 3 of inner surface of getting that one is long and the other is short, the length of steel sleeve 3 can regulate according to the difference of stress distribution.Two steel sleeves 3 are all closed one end, and the rim of a cup shape shunk to port is processed in other end inside, and the size of rim of a cup and the cross-sectional sizes of prestressed FRP rebar 1 adapt, and facilitate follow-up to infusion and binding material 2 in steel sleeve 3.Long steel sleeve 3 blind end welding screw rod 4, then inserts in circular anchor ring 7 by screw rod 4 through the hole on circular anchor ring 7 ring wall of stretching end, then screws on the annular steel plate washer 6 supporting with screw rod 4 and nut 5; Simultaneously for stretching end steel sleeve 3 when preventing Shi Hanzhang rotates in nut 5 drilling process, limit the rotation of steel sleeve 3 at the steel sleeve 3 welding edges gate-type steel disc 8 near screw rod 4.Steel sleeve 3, through being resisted against on opposite side inwall behind the hole on circular anchor ring 7 ring wall of anchored end, then firmly welds with the circular two ends that anchor ring 7 is contacting by short steel sleeve 3 blind end.
2) prestressed FRP rebar 1 two ends are inserted into steel sleeve blind end respectively by stretching end and anchored end steel sleeve 3 rim of a cup, then to infusion and binding material 2 in steel sleeve 3 prestressed FRP rebar 1 and steel sleeve 3 bonds securely by rim of a cup and become entirety.First with the air in vacuum machine suction duct during perfusion, then with mudjack, binding material 2 is pressed in steel sleeve 3, to improve plumpness and the compactness of binding material 2 in steel sleeve 3.
3) as shown in Figure 6, first drive two circular troughs to lay stretching end and the circular anchor ring 7 of anchored end according to the design attitude of prestressed FRP rebar 1 at the corresponding site of concrete component 9, the size of circular trough and the degree of depth can be determined according to the size of circular anchor ring 7; Output one narrow stria again on concrete component 9 surface along the circle center line connecting direction of two circular troughs, for placing prestressed FRP rebar 1, stria width can be determined according to the size of prestressed FRP rebar 1, and wants local suitably to widen in the region of placing steel sleeve 3 and gate-type steel disc 8.
4) by step 2 pour into the binding material 2 of about 1/2nd groove depths in stria after) in the device that assembles be positioned in the groove that step 3) offers, then utilize the nut 5 in the circular anchor ring 7 of the continuous turn-knob stretching end of spanner to carry out Shi Hanzhang.In order to reduce the frictional resistance between nut 5 and screw rod 4, can in screw rod 4 termination coating lubricating oil.
5) after prestress application, reuse binding material 2 and filled up in the gap of whole hole slot, after the complete coagulation forming of colloid reaches predetermined strength, namely whole work progress has accused.
embodiment two:
The present embodiment is substantially identical with above-described embodiment one, difference is, described prestressed FRP rebar 1 has two and at a distance of nearer, now the anchor ring of stretching end and anchored end can be improved, the hole slot that surface of concrete structure is opened simultaneously also does corresponding adjustment, as shown in Figure 7, other concrete implementation step is identical with embodiment one, can realize the component Shi Hanzhang simultaneously to having two prestressed FRP rebar.
Claims (6)
1. a built-in ground tackle formula pre-stress FRP bar stretching and anchoring device, it is characterized in that, comprise prestressed FRP rebar (1), binding material (2), steel sleeve (3), screw rod (4), nut (5), annular steel plate washer (6) and circular anchor ring (7), the openend of the steel sleeve (3) being positioned at stretching end and anchored end place is inserted at the two ends of described prestressed FRP rebar (1) respectively, and fix with binding material (2), one section of screw rod (4) is welded at the blind end of the steel sleeve (3) at stretching end place, make screw rod (4) through the ring wall of the circular anchor ring (7) of stretching end, and in circular anchor ring (7), the annular steel plate washer (6) supporting with screw rod (4) and nut (5) are installed, by the ring wall of the blind end of the steel sleeve (3) of anchored end through the circular anchor ring (7) of anchored end, and weld together with circular anchor ring (7).
2. built-in ground tackle formula pre-stress FRP bar stretching and anchoring device according to claim 1, is characterized in that, the steel sleeve (3) at stretching end place welds near the end of screw rod (4) rotation that a gate-type steel disc (8) limits steel sleeve (3) in advance.
3. built-in ground tackle formula pre-stress FRP bar stretching and anchoring device according to claim 1, is characterized in that, described prestressed FRP rebar (1) adopts carbon fibre bar, aramid fiber reinforced plastic bars or glass fiber-reinforced polymer, and its cross sectional shape is circular, rectangle or square; Or adopt FRP plate bar to replace prestressed FRP rebar (1); Process to strengthen the adhesion stress between prestressed FRP rebar (1) and binding material (2) to prestressed FRP rebar (1) surface sandblasting or Ginding process.
4. built-in ground tackle formula pre-stress FRP bar stretching and anchoring device according to claim 1, it is characterized in that, described binding material (2) selects acrylic resin, epoxy resin, or in binding material (2), adds curing compound, flexibilizer to improve adhesive property.
5. built-in ground tackle formula pre-stress FRP bar stretching and anchoring device according to claim 1, it is characterized in that, described steel sleeve (3) inside is processed with screw thread, and is processed in inside, openend the rim of a cup shape shunk to port.
6. built-in ground tackle formula pre-stress FRP bar stretching and anchoring device according to claim 1, it is characterized in that, the thickness of described circular anchor ring (7) is 7 ~ 11mm, can provide enough rigidity as prestressing force load-carrying construction; The diameter of circular anchor ring (7) is 76mm, for the operation of spanner tightening nut (5) provides enough spaces; Height and its buried depth of circular anchor ring (7) adapt, and are 20 ~ 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510550628.3A CN105178515B (en) | 2015-09-01 | 2015-09-01 | A kind of built-in anchorage formula pre-stress FRP bar stretching and anchoring device |
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| CN201510550628.3A CN105178515B (en) | 2015-09-01 | 2015-09-01 | A kind of built-in anchorage formula pre-stress FRP bar stretching and anchoring device |
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| CN105178515A true CN105178515A (en) | 2015-12-23 |
| CN105178515B CN105178515B (en) | 2017-06-23 |
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| CN201510550628.3A Expired - Fee Related CN105178515B (en) | 2015-09-01 | 2015-09-01 | A kind of built-in anchorage formula pre-stress FRP bar stretching and anchoring device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106568646A (en) * | 2016-10-19 | 2017-04-19 | 江苏大学 | FRP reinforcement tension test apparatus and test method |
| CN108005311A (en) * | 2017-12-12 | 2018-05-08 | 中冶建筑研究总院有限公司 | A kind of fiber answers the connector of material muscle |
| CN108517765A (en) * | 2018-04-13 | 2018-09-11 | 重庆交通大学 | Deformed bar anchor |
| CN109081640A (en) * | 2018-09-13 | 2018-12-25 | 福建瑞森水泥制品发展有限公司 | A kind of geo-polymer composite pole and preparation method thereof |
| CN109112977A (en) * | 2018-09-04 | 2019-01-01 | 南京林业大学 | A kind of quick prestressed reinforcement bridge beam body structure and method |
| CN112176993A (en) * | 2020-10-23 | 2021-01-05 | 洛阳理工学院 | Preparation and tensioning method of composite reinforcement |
| CN112900267A (en) * | 2021-01-12 | 2021-06-04 | 中国建筑第八工程局有限公司 | Tensioning and anchoring system and method for carbon fiber plate bundles |
| CN112942684A (en) * | 2021-02-04 | 2021-06-11 | 北京工业大学 | Strip-type component tensioning and anchoring integrated device with multiple anchoring capabilities |
| CN114427202A (en) * | 2021-12-31 | 2022-05-03 | 山西省交通科技研发有限公司 | Carbon fiber composite material rib anchoring method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106568646A (en) * | 2016-10-19 | 2017-04-19 | 江苏大学 | FRP reinforcement tension test apparatus and test method |
| CN108005311A (en) * | 2017-12-12 | 2018-05-08 | 中冶建筑研究总院有限公司 | A kind of fiber answers the connector of material muscle |
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| CN108517765A (en) * | 2018-04-13 | 2018-09-11 | 重庆交通大学 | Deformed bar anchor |
| CN109112977A (en) * | 2018-09-04 | 2019-01-01 | 南京林业大学 | A kind of quick prestressed reinforcement bridge beam body structure and method |
| CN109112977B (en) * | 2018-09-04 | 2024-01-16 | 南京林业大学 | Rapid prestress reinforced bridge body structure and method |
| CN109081640A (en) * | 2018-09-13 | 2018-12-25 | 福建瑞森水泥制品发展有限公司 | A kind of geo-polymer composite pole and preparation method thereof |
| CN112176993A (en) * | 2020-10-23 | 2021-01-05 | 洛阳理工学院 | Preparation and tensioning method of composite reinforcement |
| CN112900267A (en) * | 2021-01-12 | 2021-06-04 | 中国建筑第八工程局有限公司 | Tensioning and anchoring system and method for carbon fiber plate bundles |
| CN112900267B (en) * | 2021-01-12 | 2022-10-04 | 中国建筑第八工程局有限公司 | Tensioning and anchoring system and method for carbon fiber plate bundles |
| CN112942684A (en) * | 2021-02-04 | 2021-06-11 | 北京工业大学 | Strip-type component tensioning and anchoring integrated device with multiple anchoring capabilities |
| CN114427202A (en) * | 2021-12-31 | 2022-05-03 | 山西省交通科技研发有限公司 | Carbon fiber composite material rib anchoring method |
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