CN106836021B - A kind of pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision - Google Patents
A kind of pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision Download PDFInfo
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- CN106836021B CN106836021B CN201710010157.6A CN201710010157A CN106836021B CN 106836021 B CN106836021 B CN 106836021B CN 201710010157 A CN201710010157 A CN 201710010157A CN 106836021 B CN106836021 B CN 106836021B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
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- Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a kind of pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provisions, including beams of concrete, the stretching bed seat of face beams of concrete web side, transfer in beams of concrete flange plate and web junction is set, FRP sheet material front ends portion anchor in beams of concrete web bottom end is set, the FRP sheet material middle part steel press strips being arranged in the middle part of beams of concrete web, the FRP sheet materials rear end anchor being arranged on the downside of beams of concrete flange plate outer end, limiting device and stabilising arrangement mounted on beams of concrete web side is set, the jack being secured transverse on stretching bed seat, the steel plate after the stretching end front spring and stretching end of jack both sides, the screw rod of steel plate after stretching end front spring and stretching end, the FRP sheet material stretching end fixtures adjacent to beams of concrete one end in screw rod are set.Apparatus of the present invention making is simple, installation is quick, convenient, can play the role of Shear Strengthening to pasting beams of concrete side after FRP sheet materials application prestressing force.
Description
Technical field
The invention belongs to civil engineering, architectural engineering, highway engineering and municipal works fields, are related to a kind of pre-stress FRP
Sheet material Shear Strengthening beams of concrete experimental provision.
Background technology
Prestressed concrete T type cuts section bar (T beams) and prestressed concrete box type cuts section bar, and (box beam) is building structure, bridge
Common beams of concrete in girder construction.In recent years, due to overload, natural environment effect and the cracking of material property, highway bridge
Usually there is diagonal crack in middle T beams and the web of box beam, need to its reinforcing.
T beams and traditional reinforcement means of box beam, which mainly have, increases the method for section, bonding steel plate method, external prestressing method, conversion
System method etc..But above-mentioned reinforcement means has the following disadvantages：1) damaged concrete beam can not be quickly repaired, it is such as external pre-
The stretching and anchoring device of stress method is complicated, and Enlargement of Section needs to plant reinforcing bar, formwork supporting plate, casting concrete etc..2) steel plate is easy to
Corrosion, severely impacts interfacial bond property.3) dead weight of beams of concrete is increased larger.In recent years due to fiber-reinforced polymer
The spies such as (Fiber Reinforced Polymer, referred to as " FRP ") composite material has high-strength light, corrosion-resistant, construction is convenient
Property, it is used widely in world's most countries using externally bonded FRP reinforcement sheet material reinforced concrete beam, it is mixed based on FRP material exploitation
The research of the various novel reinforced technologies of Xtah Crude Clay structure also becomes one of the hot spot of Structural Engineering research field.Externally bonded FRP reinforcement sheet material
Reinforcement technique, that is, use adhesive (be mostly epoxy resin) by FRP sheet attachings beams of concrete bottom or side, for mixing
The bending resistance of solidifying Tu Liang, Shear Strengthening；Or fiber cloth is wrapped in concrete column surface, for improve column bearing capacity and prolong
Property.
Despite the presence of aforementioned advantage, the common FRP sheet materials reinforced concrete structure technology of outer patch still face in engineer application
Face some major issues that can not avoid：1) rate of utilization of strength of FRP sheet materials is low；2) opening for beams of concrete diagonal crack cannot be limited
Exhibition；3) rigidity of beams of concrete cannot be promoted effectively, severely impact the normal use performance of beams of concrete.For this purpose, some
Scholar proposes to apply prestressing force to common FRP sheet materials, forms pre-stress FRP sheet material reinforcement technique, can give full play to FRP sheet materials
The characteristic of high-strength light delays component cracking, limitation crack developing, is effectively improved beams of concrete normal use performance.
In the patent document of Publication No. CN102425311B, disclose a kind of based on Strengthened With Near Surface Mounted pre-stress FRP plate
The reinforcement means of item.This method is that a groove is opened on waiting for reinforced concrete structure, installs the tensioner and FRP of FRP plate item
Lath fixture is put it into slot after tensioning FRP plate item, filling adhesive, after to be bonded dose of solidification, removes tensioning equipment, from
And obtain prestressing force.Apply prestressed method although being given in this patent of invention, do not illustrate how anchoring and
Tensioning FRP plate item.
In the patent document of Publication No. CN102304958A, a kind of Strengthened With Near Surface Mounted reinforced concrete structure use is disclosed
The prestress clamp of fiber lath, including fixture outline border, fixture press strip, pushing tow bolt.Keep fixture press strip tight by pushing tow bolt
Fiber lath is tightly suppressed, anchorage effect is played.Anchoring process involved in the disclosure patent will slot in advance in beam bottom, to coagulation
The damage of Tu Liang is larger, relates only to the anti-bend reinforced of beams of concrete.
In the patent document of Publication No. CN105178515A, a kind of built-in anchorage formula prestressed FRP rebar is disclosed
Draw anchor, including steel sleeve, binding material, screw rod, nut, annular steel plate washer and round anchor ring.The device is by FRP tendons
Both ends be inserted into respectively in the steel sleeve at stretching end and anchored end, fixed with binding material, in stretching end steel sleeve
Blind end welds one section of screw rod, and screw rod is made to pass through the doughnut ring wall of stretching end, and installation and screw rod are mating in round anchor ring
The blind end of fixing end steel sleeve is passed through the ring wall of the round anchor ring of anchored end, and and doughnut by annular steel plate washer and nut
Boxing is connected together.The device is suitable for the stretch-draw anchor of FRP tendons, for the anti-bend reinforced of beams of concrete, is not involved with mixed
The Shear Strengthening of solidifying Tu Liang.
In the patent document of Publication No. CN101736912B, a kind of anchoring of pre-stressed fiber cloth external pasting is disclosed
Method.The anchoring process is：It is with resin that pre-stress FRP sheet material and concrete binding is integral, after resin is heating and curing
Tension prestress is put, certain measure, release or part release pre-stress FRP are taken to pre-stress FRP sheet material anchored end in end
Sheet material anchors the prestressing force of end, achievees the purpose that elimination or reduces end stress concentration.Pre- answer is only related in this patent
Power FRP sheet material end anchorages, tensioning, anchoring package unit without reference to pre-stress FRP sheet material.
In the patent document of Publication No. CN10173252A, a kind of adding for beams of concrete pre-stress FRP cloth material is disclosed
It is fixedly mounted with and sets.The device is to carry the shell of steel plate in three face of FRP cloth material end set, and the both sides of shell are provided with sliding slot.In sliding slot
The reinforcing screw rod with pull rod is penetrated, FRP cloth material is wound on reinforcing screw rod, by the movement of sliding slot draw-in bar to FRP cloth material
Apply prestressing force.Although the device can apply prestressing force to FRP cloth material, the shearing resistance for being not involved with beams of concrete adds
Gu.
In the patent document of Publication No. CN105839936A, a kind of stretch-draw anchor of pre-stress FRP grid is disclosed
Device, including lower liner plate, top board and fastening connection piece.The operation principle of the device be FRP grids are embedded into be carved with laterally,
In the lower liner plate of longitudinal fluting, it will be compressed with the top board of corresponding position costal, be used in combination fastening connection piece to connect, make FRP nets
Lattice are anchored in beam body.But the Shear Strengthening without reference to beams of concrete of the device.
In conclusion in existing open source literature, it is related to tensioning, the anchor of FRP tendons mostly, FRP tendons exist with FRP sheet materials
Geometric configuration, material, Physical and mechanical properties etc. are entirely different, thus cannot be directly by the tensioning of FRP tendons, anchor
Applied to FRP sheet materials.In addition, also having no the experimental provision for being related to pre-stress FRP sheet material Shear Strengthening beams of concrete.
Invention content
Technical problem：A kind of making of present invention offer is simple, installation is quick, facility, the pre-stress FRP that may be reused
Sheet material Shear Strengthening beams of concrete experimental provision.
Technical solution：The pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision of the present invention, including beams of concrete,
The stretching bed seat of beams of concrete web side described in face, the steering being arranged in beams of concrete flange plate and web junction fill
Set, be arranged the FRP sheet material front ends in beams of concrete web bottom end portion anchor, the FRP that is arranged in the middle part of beams of concrete web
Sheet material middle part steel press strip, the FRP sheet materials rear end anchor being arranged on the downside of beams of concrete flange plate outer end, setting, which are mounted on, to be mixed
The limiting device and stabilising arrangement of solidifying soil beam web side, the jack being secured transverse on the stretching bed seat, be located at it is described
Steel plate after the stretching end front spring and stretching end of jack both sides, after the stretching end front spring and stretching end steel plate spiral shell
The FRP sheet material stretching end fixtures adjacent to beams of concrete one end in screw rod are arranged in bar.
The present invention preferred embodiment in, the transfer include the interior steering block being embedded into beams of concrete protective layer,
It is bolted on the outer steering block at the interior steering block both ends respectively, after the bolt passes through interior steering block and outer steering block
It is tightened with nut.
In the preferred embodiment of the present invention, the FRP sheet material front ends anchor, FRP sheet material middle part steel press strips and FRP sheet materials
Rear end anchor structure is identical, includes the interior backing plate being embedded into beams of concrete protective layer, outer plate and expansion bolt, institute
Expansion bolt is stated to be tightened with nut after interior backing plate and outer plate.
The present invention preferred embodiment in, the limiting device include front spring, bearing diagonal, bottom steel plate constitute tripod,
Rubber mat plate on the outside of the front spring is set, and the position for adjusting beams of concrete, the limiting device is at the steel plate of bottom
Using foot bolt fastening on ground.
In the preferred embodiment of the present invention, the FRP sheet materials stretching end fixture includes upper T-type intermediate plate and by bolt and upper T
The lower T-type intermediate plate of type intermediate plate connection, the upper T-type intermediate plate and lower T-type intermediate plate clamp FRP sheet materials.
In the preferred embodiment of the present invention, the screw rod passes through the circular hole on upper T-type intermediate plate and lower T-type intermediate plate, uses outer limit
Position nut is tightened, is limited.
The present invention preferred embodiment in, the stabilising arrangement include upper slotting ear formula anchor, lower slotting ear formula anchor,
It the brace for connecting the upper slotting ear formula anchor and lower slotting ear formula anchor, the branch sleeve being sleeved on the brace and sets
The anchor bolt on the lower slotting ear formula anchor is set, the brace both ends are anchored respectively with upper slotting ear formula by bolt and filled
It sets and the installation of lower slotting ear formula anchor connects.
In the preferred embodiment of the present invention, the upper slotting ear formula anchor is identical with lower slotting ear formula anchor structure,
Including anchoring bottom steel plate and the slotting ear with circular hole being arranged on the anchoring bottom steel plate.
Experimental provision provided by the invention pastes beams of concrete side after can applying prestressing force to FRP sheet materials, plays
The effect of Shear Strengthening；Experimental provision applicable surface provided by the invention is extensive, can be not only used for beams of concrete, girder steel, and
It can be adapted for the beam Shear Strengthening of different cross section form.Experimental provision convenient construction of the present invention, operation is simple, Ke Yiyou
Effect ground applies prestressing force to FRP sheet materials, plays the high-strength characteristic of FRP sheet materials, improves the performance for being reinforced beam.
Advantageous effect：Compared with prior art, the present invention haing the following advantages：
1. realizing pre-stress FRP sheet material Shear Strengthening beams of concrete
It is in pre-stress FRP tensioning, anchor disclosed in existing patent document and pertinent literature to relate to prestressed FRP rebar more
Tensioning, anchor, the tensioning of existing FRP sheet materials or FRP grids, anchor operation principle are filled with the experiment in the present invention
It sets entirely different, also has no the open source literature for being related to pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision.
The pre-stress FRP sheet material Shear Strengthening concrete experiments device that the present invention designs is processed according to design requirement and is assembled
It after good, can be quickly installed, prestressing force is applied to FRP sheet materials and be anchored at beam body side, realize that the shearing resistance of beams of concrete adds
Gu.
2. easy for construction, repeatable utilize
In the patent document of Publication No. CN101736912B, a kind of anchoring of pre-stressed fiber cloth external pasting is disclosed
Method.The anchoring process is：It is with resin that pre-stress FRP sheet material and concrete binding is integral, after resin is heating and curing
Tension prestress is put, certain measure, release or part release pre-stress FRP are taken to pre-stress FRP sheet material anchored end in end
Sheet material anchors the prestressing force of end, achievees the purpose that elimination or reduces end stress concentration.Pre- answer is only related in this patent
Power FRP sheet material end anchorages, tensioning, anchoring package unit without reference to pre-stress FRP sheet material.
In the patent document of Publication No. CN10173252A, a kind of adding for beams of concrete pre-stress FRP cloth material is disclosed
It is fixedly mounted with and sets.The device is to carry the shell of steel plate in three face of FRP cloth material end set, and the both sides of shell are provided with sliding slot.In sliding slot
The reinforcing screw rod with pull rod is penetrated, FRP cloth material is wound on reinforcing screw rod, by the movement of sliding slot draw-in bar to FRP cloth material
Apply prestressing force.Although the device can apply FRP cloth material prestressing force, its operation principle and the device in the present invention are complete
It is complete different.
In the patent document of Publication No. CN105839936A, a kind of stretch-draw anchor of pre-stress FRP grid is disclosed
Device, including lower liner plate, top board and fastening connection piece.The operation principle of the device be FRP grids are embedded into be carved with laterally,
In the lower liner plate of longitudinal fluting, it will be compressed with the top board of corresponding position costal, be used in combination fastening connection piece to connect, make FRP nets
Lattice are anchored in beam body.Obviously, the operation principle of the device and the device in the present invention are entirely different.
FRP sheet materials disclosed in the above patent document or the tensioning of FRP grids, anchor operation principle in the present invention
Experimental provision is entirely different.Pre-stress FRP sheet material Shear Strengthening experimental provision in the present invention makes simple, installation quickly, just
Profit.After construction, package unit can be laid down, be reused, save material.
3. applied widely
The present invention does not need special installation, and occupied space is smaller, saves construction cost.The present invention has wide range of applications, no
Beams of concrete and girder steel are can be only used for, and can be adapted for the beams of concrete of different cross section form (rectangle, T-type, box)
Or the Shear Strengthening of girder steel.
Description of the drawings
Fig. 1 is experimental provision schematic diagram of the present invention, and wherein Fig. 1 a are schematic side view, and Fig. 1 b are schematic top plan view, Fig. 1 c
For schematic elevation view；
Fig. 2 is FRP sheet material transfer schematic diagrames in experimental provision of the present invention；
Fig. 3 is FRP sheet material front ends portion anchor, FRP sheet material middle part steel press strips and FRP sheet materials in experimental provision of the present invention
Rear end anchor schematic device；
Fig. 4 is beams of concrete limiting device schematic diagram in experimental provision of the present invention, and wherein Fig. 4 a are schematic side view, Fig. 4 b
For schematic elevation view；
Fig. 5 is beams of concrete stabilising arrangement schematic diagram in experimental provision of the present invention, and wherein Fig. 5 a are schematic side view, Fig. 5 b
For schematic elevation view；
Fig. 6 is slotting ear formula anchor schematic diagram in experimental provision of the present invention, and wherein 6a is schematic side view, and Fig. 6 b are just
Depending on schematic diagram；
Fig. 7 is FRP sheet material stretching end fixture schematic diagrames in experimental provision of the present invention, and wherein 7a is schematic side view, Fig. 7 b
For schematic top plan view, 7c is schematic elevation view.
In figure：1 is beams of concrete；2 be transfer；3 be FRP sheet material front end anchors；4 be FRP sheet materials rear end anchor
It is fixedly mounted with and sets；5 be press strip in the middle part of FRP sheet materials；6 be limiting device；7 be stabilising arrangement；8 be foundation bolt；9 be FRP sheet materials；10 are
FRP sheet material stretching end fixtures；11 be screw rod；12 be front spring；13 be rear steel plate；14 be jack；15 be middle limit screw cap；16
For outer anchorage nut；17 be very heavy top support；18 be polyfluortetraethylene plate；19 be stretching bed seat；20 be interior steering block；21 be outer
Steering block；22 be bolt；23 be interior backing plate；24 be outer plate；25 be expansion bolt；26 be front spring；27 be bearing diagonal；28 are
Bottom steel plate；29 be rubber mat plate；30 be upper T-type intermediate plate；31 be lower T-type intermediate plate；32 be circular hole；33 be outer limit screw cap；34 are
Upper slotting ear formula anchor；35 be lower slotting ear formula anchor；36 be brace；37 be branch sleeve；38 be anchor bolt；39 are
Bolt；40 be anchoring bottom steel plate；41 be slotting ear.
Specific implementation mode
With reference to embodiment and Figure of description, the present invention is further illustrated.
The pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision of the present invention, including be arranged on the beams of concrete edge of a wing
After plate and the transfer of web junction 2, FRP sheet material front ends portion anchor 3, FRP sheet material middle part steels press strip 5, FRP sheet materials
Steel plate 13, jack 14, limit dress after end anchor 4, FRP sheet material stretching ends fixture 10, stretching end front spring 12, stretching end
Set 6, stabilising arrangement 7, very heavy top support 17, stretching bed seat 19, polyfluortetraethylene plate 18, connection FRP sheet material stretching ends fixture simultaneously
The screw rod 11 of steel plate after stretching end front spring and stretching end.
The transfer 2 includes the interior steering block 20 being embedded into 1 protective layer of beams of concrete, outer steering block 21, fixes
The bolt 22 of interior steering block 20 and outer steering block 21, the bolt 22 are twisted after passing through interior steering block 20 and outer steering block 21 with nut
Tightly.
4 knot of FRP sheet material front ends portion anchor 3, FRP sheet material middle part steels press strip 5 and FRP sheet materials rear end anchor
Structure is identical, includes the interior backing plate 23 being embedded into 1 protective layer of beams of concrete, outer plate 24 and expansion bolt 25, the expansion
Bolt 25 is tightened after passing through interior backing plate 23 and outer plate 24 with nut.
The limiting device 6 include front spring 26, bearing diagonal 27, bottom steel plate 28, rubber mat plate 29, the front spring 26,
Bearing diagonal 27, bottom steel plate 28 are welded to each other together, mixed for adjusting before the rubber mat plate 29 is placed on the front spring 26
The position of solidifying soil beam 1, the limiting device 6 are anchored at ground at bottom steel plate 28 using foundation bolt 8.
The FRP sheet materials stretching end fixture 10, including upper T-type intermediate plate 30, lower T-type intermediate plate 31, the upper T-type intermediate plate 30,
Lower T-type intermediate plate 31 is bolted and clamps FRP sheet materials 9.
The screw rod 11 passes through the circular hole 32 of upper T-type intermediate plate 30 and lower T-type intermediate plate 31, tightened using outer limit screw cap 33,
Limit.
The stabilising arrangement 7 includes upper slotting ear formula anchor 34, lower slotting ear formula anchor 35, brace 36, connector sleeve
Cylinder 37 and anchor bolt 38, the brace 36 pass through bolt 39 with upper slotting ear formula anchor 34 and lower slotting ear formula anchor 35
Connection, the brace 36 can surround bolt 39 and rotate, adjust position, connected by branch sleeve 37.Stabilising arrangement 7 is in underthrust
At ear formula anchor 35 ground is anchored at using anchor bolt 38.
The upper slotting ear formula anchor 34 is identical with 35 structures of lower slotting ear formula anchor, includes anchoring bottom steel plate 40
With the slotting ear 41 with circular hole, the slotting ear 41 with circular hole is connect by welding with anchoring bottom steel plate 40.
The upper slotting ear formula anchor 34 is anchored in 1 side of beams of concrete, lower slotting ear formula anchoring using anchor bolt 38
Device 35 is connect using anchor bolt 38 with bottom steel plate 28.
The screw rod 11 passes through front spring 12 and rear steel plate 13, and limit screw cap 15 limits in use, uses outer anchorage nut
16 fix with rear steel plate 13.
Steel plate 13 moves right on polyfluortetraethylene plate 18 after 14 pushing tow of the jack, drives screw rod 11, FRP sheet materials
Stretching end fixture 10 and FRP sheet materials 9 move right jointly, apply prestressing force to FRP sheet materials 9.
The material of the FRP sheet materials 9 is carbon fiber plate (CFRP), aramid fiber reinforced plastic (AFRP), basalt fibre piece
Material (AFRP) or glass fibre sheet (BFRP) or above two or two or more materials it is compound.
Now illustrated by taking the experiment of pre-stress FRP sheet material Shear Strengthening beams of concrete as an example：
(1) it according to design requirement precast concrete beam 1 and is installed in place.
(2) according to design requirement precast concrete beam limiting device 6 and beams of concrete stabilising arrangement 7, make in precalculated position
It is installed in place with foundation bolt 8 and anchor bolt 38, rubber mat plate 29, adjustment, limitation is placed before 6 front spring 26 of limiting device
And stabilizing concrete beam 1.
(3) according to design requirement precast concrete beam flange plate and the transfer of web junction 2, FRP sheet material front ends
Portion's anchor 3, FRP sheet material middle part steels press strip 5, FRP sheet materials rear end anchor 4, interior steering block 20 and interior backing plate 23 is embedding
Enter to beams of concrete protective layer predetermined position.
(4) FRP sheet materials 9 are infiltrated using epoxy adhesive, passes through transfer 2, FRP sheet material front ends portion anchoring dress
3, FRP sheet material middle part steels press strip 5 and FRP sheet materials rear end anchor 4 are set, outer steering block 21, outer plate 24 are installed in place.
(5) according to steel plate 13 after the prefabricated FRP sheet materials stretching end fixture 10 of design requirement, stretching end front spring 12, stretching end,
Steel plate 13 after FRP sheet material stretching ends fixture 10, stretching end front spring 12, stretching end is linked together using screw rod 11, is tightened
Outer anchorage nut 16.
(6) very heavy top support 17, polyfluortetraethylene plate 18 and jack 14 are placed.
(7) FRP sheet materials are pierced between upper T-type intermediate plate 30, lower T-type intermediate plate 31, tightens bolt, clamp FRP sheet materials.
(8) it is moved right on polyfluortetraethylene plate 18 using steel plate 13 after 14 pushing tow of jack, drives screw rod 11, FRP
Sheet material stretching end fixture 10 and FRP sheet materials 9 move right jointly, apply prestressing force to FRP sheet materials 9.
(9) after tightening transfer 2, FRP sheet material front ends portion anchor 3, FRP sheet material middle part steels press strip 5 and FRP sheet materials
Hold the bolt on anchor 4, fixed FRP sheet materials.
(10) it keeps stretching force constant, tightens middle limit screw cap 15, removal jack 14.
(11) after epoxy resin is fully cured, in FRP sheet materials rear end, 4 right end of anchor cuts FRP sheet materials, realizes pre-
Stress FRP Shear Strengthenings.
Above-described embodiment is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill of the art
For personnel, without departing from the principle of the present invention, several improvement and equivalent replacement can also be made, these are to the present invention
Claim be improved with the technical solution after equivalent replacement, each fall within protection scope of the present invention.
Claims (7)
1. a kind of pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision, which is characterized in that the device includes beams of concrete
（1）, beams of concrete described in face（1）The stretching bed seat of web side（19）, be arranged in beams of concrete（1）Flange plate and web are handed over
Connect the transfer at place（2）, be arranged in beams of concrete（1）The FRP sheet material front ends portion anchor of web bottom end（3）, setting exist
Beams of concrete（1）FRP sheet material middle part steel press strips in the middle part of web（5）, be arranged in beams of concrete（1）On the downside of flange plate outer end
FRP sheet materials rear end anchor（4）, setting be mounted on beams of concrete（1）The limiting device of web side（6）And stabilising arrangement
（7）, be secured transverse to the stretching bed seat（19）On jack（14）, be located at the jack（14）Before the stretching end of both sides
Steel plate（12）With steel plate after stretching end（13）, pass through the stretching end front spring（12）With steel plate after stretching end（13）Screw rod
（11）, be arranged in screw rod（11）Neighbouring beams of concrete（1）The FRP sheet material stretching end fixtures of one end（10）, the stabilising arrangement
（7）Including upper slotting ear formula anchor（34）, lower slotting ear formula anchor（35）, the connection upper slotting ear formula anchor（34）
With lower slotting ear formula anchor（35）Brace（36）, be sleeved on the brace（36）On branch sleeve（37）With setting described
Lower slotting ear formula anchor（35）On anchor bolt（38）, the brace（36）Both ends pass through bolt（39）Respectively with upper slotting ear
Formula anchor（34）With lower slotting ear formula anchor（35）Installation connection.
2. pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 1, which is characterized in that institute
State transfer（2）Including being embedded into beams of concrete（1）Interior steering block in protective layer（20）, pass through bolt respectively（22）It is fixed
In the interior steering block（20）The outer steering block at both ends（21）, the bolt（22）Across interior steering block（20）With outer steering block
（21）It is tightened afterwards with nut.
3. pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 1, which is characterized in that institute
State FRP sheet material front ends portion anchor（3）, FRP sheet material middle part steel press strips（5）With FRP sheet materials rear end anchor（4）Structure phase
Together, include being embedded into beams of concrete（1）Interior backing plate in protective layer（23）, outer plate（24）And expansion bolt（25）, described
Expansion bolt（25）Across interior backing plate（23）And outer plate（24）It is tightened afterwards with nut.
4. pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 1, which is characterized in that institute
State limiting device（6）Including front spring（26）, bearing diagonal（27）, bottom steel plate（28）The tripod of composition is arranged in the preceding steel
Plate（26）The rubber mat plate in outside（29）, for adjusting beams of concrete（1）Position, the limiting device（6）In bottom steel plate
（28）Place uses foundation bolt（8）It is anchored at ground.
5. pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 1,2,3 or 4, feature
It is, the FRP sheet materials stretching end fixture（10）Including upper T-type intermediate plate（30）With pass through bolt and upper T-type intermediate plate（30）Connection
Lower T-type intermediate plate（31）, the upper T-type intermediate plate（30）With lower T-type intermediate plate（31）Clamp FRP sheet materials（9）.
6. pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 5, which is characterized in that institute
State screw rod（11）Across upper T-type intermediate plate（30）With lower T-type intermediate plate（31）On circular hole（32）, use outer limit screw cap（33）It twists
Tightly, it limits.
7. pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 1,2,3 or 4, feature
It is, the upper slotting ear formula anchor（34）With lower slotting ear formula anchor（35）Structure is identical, includes anchoring bottom steel plate
（40）With setting in anchoring bottom steel plate（40）On the slotting ear with circular hole（41）.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710010157.6A CN106836021B (en) | 2017-01-06 | 2017-01-06 | A kind of pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision |
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| CN201710010157.6A CN106836021B (en) | 2017-01-06 | 2017-01-06 | A kind of pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision |
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| CN106836021B true CN106836021B (en) | 2018-07-24 |
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