CN212359200U - Reverse stretch-draw anchor subassembly of prestressing force FRP board - Google Patents
Reverse stretch-draw anchor subassembly of prestressing force FRP board Download PDFInfo
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- CN212359200U CN212359200U CN202020121843.8U CN202020121843U CN212359200U CN 212359200 U CN212359200 U CN 212359200U CN 202020121843 U CN202020121843 U CN 202020121843U CN 212359200 U CN212359200 U CN 212359200U
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- draw
- ground tackle
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Abstract
The utility model discloses a reverse stretch-draw anchor subassembly of prestressing force FRP board, this anchor subassembly includes stretch-draw end subassembly and stiff end subassembly, stretch-draw end subassembly includes the stretch-draw end pedestal, stretch-draw end ground tackle, the pedestal appendix, the ground tackle appendix, the counter-force roof, stretch-draw screw rod and jack, the stretch-draw end pedestal comprises bottom plate and vertical roof, stretch-draw end pedestal and stretch-draw end ground tackle pass through stretch-draw end fixing screw to be connected, the pedestal appendix links firmly below the stretch-draw end pedestal, the ground tackle appendix links firmly below the stretch-draw end ground tackle, stretch-draw screw rod is two, pass the pedestal appendix respectively, ground tackle appendix both sides tip links together with the counter-force roof, the jack is located between ground tackle appendix and the counter-force roof, exert prestressing force for FRP board through promoting ground tackle and ground tackle appendix; the fixed end assembly comprises a fixed end pedestal and a fixed end anchorage. The assembly can uniformly apply prestress to the FRP plate, reduces the construction space, and is simple in structure and convenient to apply in practice.
Description
Technical Field
The utility model relates to an anchor subassembly, more specifically relates to a reverse stretch-draw anchor subassembly of prestressing force FRP board.
Background
The Fiber Reinforced Plastic (FRP) has the advantages of light weight, high strength, good durability, convenient construction and the like, and the externally-adhered FRP plate is widely applied to engineering structure reinforcement. Test and engineering practice results show that FRP stripping failure often occurs only by sticking the FRP plate on the surface of the structure for reinforcement, and meanwhile, due to reasons such as secondary stress, the reinforcement effect is very limited, the high-strength characteristic of the FRP cannot be fully exerted, and the FRP belongs to passive reinforcement. The external prestress anchoring technology and the FRP reinforcing technology are combined, so that the high-strength characteristic of an FRP material can be fully exerted, the utilization rate of FRP is improved, the problem of peeling of the end part of an FRP plate can be well solved, the reinforcing effect is improved, and the method belongs to active reinforcement. The conventional prestressed FRP plate reinforcing technology mostly adopts a forward tensioning method, tensioning platforms are required to be arranged at two ends of a beam to be reinforced or jack baffles are required to be installed to complete tensioning work, the method needs a large operation space, actual reinforcing length is reduced, and meanwhile, construction is limited due to limited space in application of actual engineering. Patent document No. CN106193643A discloses a prestressed CFRP plate tensioning and anchoring device for reinforcing steel beams and composite beams, which uses a center-penetrating jack located outside the tensioning device to reduce the construction space, but the device adopts double-jack construction, which is prone to produce uneven tensioning due to uneven force of jacks on both sides during tensioning, resulting in difficulty in achieving the expected effect of the applied prestress, and the center-penetrating jack is inconvenient to install and disassemble, increasing the construction difficulty.
Disclosure of Invention
Utility model purpose: the utility model aims at providing a can be to the balanced prestressing force that applys of FRP board, save construction space, the reverse stretch-draw anchor subassembly of prestressing force FRP board of being convenient for construction.
The technical scheme is as follows: the utility model relates to a reverse stretch-draw anchor subassembly of prestressing force FRP board, including stretch-draw end subassembly and stiff end subassembly, stretch-draw end subassembly includes the stretch-draw end pedestal, stretch-draw end ground tackle, pedestal annex, ground tackle annex, the counter-force roof, stretch-draw screw rod and jack, the stretch-draw end pedestal comprises bottom plate and vertical roof, and be equipped with the stiffening rib, stretch-draw end pedestal and stretch-draw end ground tackle are connected through stretch-draw end fixing screw rod, the pedestal annex links firmly below the stretch-draw end pedestal, the ground tackle annex links firmly below the stretch-draw end ground tackle, stretch-draw screw rod is two, pass the pedestal annex respectively, ground tackle annex both sides tip links together with the counter-force roof, the jack is located between ground tackle annex and the counter-force roof, exert prestressing force for FRP board through promoting ground tackle and ground tackle annex; the fixed end assembly comprises a fixed end pedestal and a fixed end anchorage.
Wherein, the jack is a single small-sized hydraulic jack, the side surface of a vertical top plate of a tensioning end pedestal is provided with a group of first circular pore passages, the bottom surface of the vertical top plate is provided with a group of first internal thread holes, a pedestal additional part is provided with first additional internal thread holes with the same diameter as the first internal thread holes on the tensioning end pedestal, a tensioning end anchorage device consists of an anchor cup and a wedge-shaped clamping piece, the two sides of the anchor cup are symmetrically provided with a pair of second circular pore passages corresponding to the first circular pore passages on the tensioning end pedestal, the bottom surface of the tensioning end anchorage device is provided with a group of second internal thread holes, the corresponding position of the anchorage device additional part is provided with second additional internal thread holes with the same diameter as the second internal thread holes on the tensioning end anchorage device, the side surface of the pedestal additional part is symmetrically provided with first tensioning pore passages positioned outside the first additional thread holes, the side surface of the anchorage device additional part is symmetrically provided with sliding pore passages corresponding to the, the two sides of the counter-force top plate are symmetrically provided with a second tensioning hole corresponding to the first tensioning hole and the sliding hole, the two ends of the tensioning screw are threaded sections, the middle of the tensioning screw is a smooth section, the two ends of the tensioning screw are fixed with the first tensioning hole and the second tensioning hole respectively through a first counter-force nut and a second counter-force nut, the first tensioning hole is an internal threaded hole, the fixed end pedestal and the fixed end anchorage device are connected through a fixed end fixing screw, the fixed end pedestal is composed of a fixed end bottom plate and a fixed end vertical top plate, and is provided with a fixed end reinforcing rib, and the fixed end anchorage device is composed of a fixed.
Has the advantages that: compared with the prior art, the utility model, its advantage is: 1. the uniform tensile force can be applied to the FRP plate, and the prestress can be uniformly applied; 2. the jack is positioned at the inner side of the anchorage device, so that the operation space required by construction can be obviously reduced, and the jack is convenient to use in practical application; 3. the tensioning anchor assembly is light and light, the steel consumption is less, and the jack is directly arranged between the anchor additional piece and the counter-force top plate, so that the use and the removal are convenient.
Drawings
Fig. 1 is a front view of the structure of the present invention;
fig. 2 is a bottom view of the structure of the present invention;
FIG. 3 is a schematic view of the structure of the tension end pedestal;
FIG. 4 is a schematic view of a fixed end pedestal structure;
FIG. 5 is a schematic view of a tensioning end anchor configuration;
FIG. 6 is a schematic view of a fixed end anchor construction;
FIG. 7 is a schematic view of a stand attachment;
FIG. 8 is a schematic view of an anchor attachment configuration;
FIG. 9 is a schematic view of a reaction top plate configuration;
FIG. 10 is a schematic view of the FRP panel and beam structure after completion of tensioning.
Detailed Description
As shown in fig. 1 to 9, the reverse tensioning anchoring component of the prestressed FRP panel comprises a tensioning end component and a fixed end component, the tensioning end component comprises a tensioning end pedestal 2, a tensioning end anchorage device 3, a pedestal attachment 4, an anchorage attachment 5, a counter-force top plate 6, a tensioning screw 8 and a jack 9, the tensioning end pedestal 2 consists of a bottom plate 2-1 and a vertical top plate 2-2, and is further provided with 3 reinforcing ribs 2-3, a group of first circular pore channels are arranged on the side surface of the vertical top plate 2-2 of the tensioning end pedestal 2, a group of first internal thread holes are arranged on the bottom surface of the vertical top plate 2-2, the pedestal attachment 4 is provided with first additional internal thread holes with the same diameter as the first internal thread holes on the tensioning end pedestal 2, the pedestal attachment 4 is fixedly connected below the tensioning end pedestal 2 through bolts, the tensioning end anchorage device 3 consists of an anchor cup 3-1 and a wedge-shaped clip 3-2, the FRP plate 1 is clamped by mechanical friction force generated by extrusion between an anchor cup 3-1 and a wedge-shaped clamping piece 3-2, a pair of second circular pore channels corresponding to the first circular pore channels on a tensioning end pedestal 2 are symmetrically arranged on two sides of the anchor cup 3-1, a group of second internal thread holes are arranged on the bottom surface of a tensioning end anchorage device 3, second additional internal thread holes with the same diameter as the second internal thread holes on the tensioning end anchorage device 3 are arranged on the corresponding positions of an anchorage device additional piece 5, the tensioning end pedestal 2 and the tensioning end anchorage device 3 are connected by a tensioning end fixing screw 7, the opposite positions are fixed by nuts, the anchorage device additional piece 5 is fixedly connected below the tensioning end anchorage device 3 by bolts, first tensioning pore channels positioned on the outer sides of the first additional internal thread holes are symmetrically arranged on the side surfaces of a pedestal additional piece 4, sliding pore channels corresponding to the first tensioning pore channels on the pedestal additional piece 5 are symmetrically arranged on the side surfaces of the anchorage device additional piece 5, second tensioning channels corresponding to the first tensioning channels and the sliding channels are symmetrically arranged on two sides of the counter-force top plate 6, the first tensioning channels are internal threaded channels, two ends of the tensioning screws 8 are threaded sections, the middle of the tensioning screws 8 is a smooth section, the two tensioning screws 8 respectively sequentially penetrate through the first tensioning channels on two sides of the pedestal additional part 4, the sliding channels of the anchorage additional part 5 and the second tensioning channels of the counter-force top plate 6 to be connected together, the tensioning screws 8 are respectively fixed with the first tensioning channels and the second tensioning channels by using a first counter-force nut 12 and a second counter-force nut 13, the jack 9 applies prestress to the FRP plate 1 by pushing the tensioning end anchorage 3 and the anchorage additional part 5, and the jack 9 is a single small hydraulic jack; the fixing end assembly comprises a fixing end pedestal 10 and a fixing end anchorage device 11, wherein the fixing end pedestal 10 consists of a fixing end bottom plate 10-1 and a fixing end vertical top plate 10-2 and is provided with 3 fixing end reinforcing ribs 10-3, first circular hole channels are arranged on two sides of the fixing end vertical top plate 10-2, the fixing end anchorage device 11 consists of a fixing end anchor cup 11-1 and a fixing end wedge-shaped clamping piece 11-2, second circular hole channels corresponding to the first circular hole channels are symmetrically arranged on two sides of the fixing end anchor cup 11-1, and a fixing end fixing screw rod 15 penetrates through the first circular hole channels and the second circular hole channels to connect the fixing end pedestal 10 and the fixing end anchorage device 11 and is locked by nuts to fix the relative positions.
When in use, firstly, the tensioning end pedestal 2 and the fixed end pedestal 10 are fixed on the lower flange of the H-shaped steel beam to be reinforced by utilizing a high-strength bolt, the pedestal attachment 4 and the anchorage attachment 5 are respectively fixed on the tensioning end pedestal 2 and the tensioning end anchorage 3 by utilizing bolts, the two ends of the FRP plate 1 are respectively wedged into the anchor cup 3-1 and the fixed end anchor cup 11-1 by utilizing the wedge-shaped clamping piece 3-2 and the fixed end wedge-shaped clamping piece 11-2, the FRP plate 1 is clamped by depending on mechanical friction force, the fixed end anchorage 11 is fixedly connected with the fixed end pedestal 10 by utilizing the fixed end fixing screw 15, the tensioning end fixing screw 7 is fixed on the tensioning end anchorage 3 by utilizing a nut, the relative positions of the tensioning end pedestal 2 and the tensioning end anchorage 3 are fixed, the tensioning end fixing screw 7 passes through the tensioning end pedestal 2, the tail end is sleeved with the fixing nut 14, the tensioning screw 8 passes through a sliding pore channel of the anchorage attachment 5 and is screwed into a first, the first counter-force nut 12 is screwed on the outer side of the pedestal attachment 4, then the counter-force top plate 6 penetrates through the tensioning screw 8, the second counter-force nuts 13 are screwed on two sides of the counter-force top plate 6, the jack 9 is arranged between the tensioning end anchorage attachment 5 and the counter-force top plate 6, the jack 9 is started to push the anchorage attachment 5 to drive the tensioning end anchorage 3 to move, pretension force is applied to the FRP plate 1, the applied jacking force is monitored by using a monitor, when the FRP plate 1 reaches a tensioning design value due to the applied jacking force, the tail end fixing nut 14 of the tensioning end fixing screw 7 is locked, the jack 9 is controlled to stop oil supply, the jack 9 is removed after the jacking force is released, then the pedestal attachment 4, the anchorage attachment 5 and the counter-force top plate 6 are sequentially removed, and the structural schematic diagram of the FRP plate and the beam after tensioning is completed is shown in fig. 10.
Claims (8)
1. The utility model provides a reverse stretch-draw anchor subassembly of prestressing force FRP board, its characterized in that, includes stretch-draw end subassembly and stiff end subassembly, stretch-draw end subassembly includes stretch-draw end pedestal (2), stretch-draw end ground tackle (3), pedestal attachment (4), ground tackle attachment (5), counter-force roof (6), stretch-draw screw rod (8) and jack (9), stretch-draw end pedestal (2) comprise bottom plate (2-1) and vertical roof (2-2), and are equipped with stiffening rib (2-3), stretch-draw end pedestal (2) and stretch-draw end ground tackle (3) are connected through stretch-draw end clamping screw (7), pedestal attachment (4) link firmly in stretch-draw end pedestal (2) below, ground tackle attachment (5) link firmly in stretch-draw end ground tackle (3) below, stretch-draw screw rod (8) are two, pass pedestal attachment (4) respectively, The end parts of the two sides of the anchorage device additional piece (5) are connected with the reaction top plate (6), the jack (9) is positioned between the anchorage device additional piece (5) and the reaction top plate (6), and prestress is applied to the FRP plate (1) by pushing the tensioning end anchorage device (3) and the anchorage device additional piece (5); the fixed end assembly comprises a fixed end pedestal (10) and a fixed end anchor (11).
2. Prestressed FRP panel counter-tensioning anchoring assembly according to claim 1, characterized in that said jack (9) is a single small hydraulic jack.
3. The prestressed FRP panel counter-tensioning anchoring assembly according to claim 1, wherein the tensioning end pedestal (2) is provided with a set of first circular holes on the side surface of the vertical top plate (2-2), a set of first internal threaded holes on the bottom surface of the vertical top plate (2-2), and the pedestal attachment (4) is provided with first additional internal threaded holes having the same diameter as the first internal threaded holes on the tensioning end pedestal (2).
4. The prestressed FRP plate reverse tensioning anchoring assembly according to claim 3, wherein the tensioning end anchorage device (3) consists of an anchorage cup (3-1) and a wedge-shaped clamping piece (3-2), a pair of second circular pore channels corresponding to the first circular pore channels on the tensioning end pedestal (2) are symmetrically formed in two sides of the anchorage cup (3-1), a group of second internal thread holes are formed in the bottom surface of the tensioning end anchorage device (3), and second additional internal thread holes with the same diameter as the second internal thread holes on the tensioning end anchorage device (3) are formed in the corresponding positions of the anchorage device additional pieces (5).
5. The prestressed FRP plate reverse tensioning anchoring assembly according to claim 3, wherein the pedestal attachment (4) is symmetrically provided with a first tensioning hole on the outer side of the first additional internal threaded hole on the side surface, the anchorage attachment (5) is symmetrically provided with a sliding hole corresponding to the first tensioning hole on the pedestal attachment (4) on the side surface, and the reaction top plate (6) is symmetrically provided with a second tensioning hole corresponding to the first tensioning hole and the sliding hole on the two sides.
6. The prestressed FRP plate reverse tensioning anchoring assembly according to claim 5, wherein the tensioning screw (8) has two threaded ends and a smooth middle end, and the first tensioning hole and the second tensioning hole are respectively fixed at the two ends by a first counter-force nut (12) and a second counter-force nut (13).
7. The prestressed FRP panel counter-tensioned anchoring assembly of claim 5, wherein the first tensioned channel is an internally threaded channel.
8. The prestressed FRP plate reverse-tension anchoring assembly according to claim 1, wherein the fixed end pedestal (10) and the fixed end anchor (11) are connected by a fixed end fixing screw (15), the fixed end pedestal is composed of a fixed end bottom plate (10-1) and a fixed end vertical top plate (10-2) and is provided with a fixed end reinforcing rib (10-3), and the fixed end anchor (11) is composed of a fixed end anchor cup (11-1) and a fixed end wedge-shaped clamping piece (11-2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020121843.8U CN212359200U (en) | 2020-01-19 | 2020-01-19 | Reverse stretch-draw anchor subassembly of prestressing force FRP board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020121843.8U CN212359200U (en) | 2020-01-19 | 2020-01-19 | Reverse stretch-draw anchor subassembly of prestressing force FRP board |
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| CN212359200U true CN212359200U (en) | 2021-01-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155784A (en) * | 2020-01-19 | 2020-05-15 | 河海大学 | Prestressed FRP plate reverse tensioning anchoring assembly and use method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111155784A (en) * | 2020-01-19 | 2020-05-15 | 河海大学 | Prestressed FRP plate reverse tensioning anchoring assembly and use method thereof |
| CN111155784B (en) * | 2020-01-19 | 2024-03-26 | 河海大学 | Prestressed FRP plate reverse tensioning anchor assembly and application method thereof |
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