CN106836021A - 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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- CN106836021A CN106836021A CN201710010157.6A CN201710010157A CN106836021A CN 106836021 A CN106836021 A CN 106836021A CN 201710010157 A CN201710010157 A CN 201710010157A CN 106836021 A CN106836021 A CN 106836021A
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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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- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
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- Mechanical Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a kind of pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision, including beams of concrete, just to the stretching bed seat of beams of concrete web side, it is arranged on the transfer of beams of concrete flange plate and web junction, it is arranged on the FRP sheet materials leading section anchor of beams of concrete web bottom, it is arranged on the FRP sheet material middle part steel press strips in the middle part of beams of concrete web, it is arranged on the FRP sheet materials rear end anchor on the downside of beams of concrete flange plate outer end, stopping means and stabilising arrangement installed in beams of concrete web side is set, it is secured transverse to the jack 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 through stretching end front spring and stretching end, it is arranged on FRP sheet material stretching end fixture of the screw rod adjacent to beams of concrete one end.Apparatus of the present invention making is simple, it is quick, convenient to install, and can play a part of Shear Strengthening to pasting beams of concrete side after FRP sheet materials applying prestressing force.
Description
Technical field
The invention belongs to civil engineering, architectural engineering, highway engineering and municipal works field, it is 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）Cut section bar with prestressed concrete box type（Box beam）It is building structure, bridge
The beams of concrete commonly used 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, it is necessary to its reinforcing in the web of middle T beams and box beam.
Traditional reinforcement means of T beams and box beam mainly has the increase method of 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 cannot be quickly repaired, it is such as external
The stretching and anchoring device of electrothermal prestressing is complicated, and Enlargement of Section needs to plant reinforcing bar, formwork supporting plate, casting concrete etc..2) steel plate is easy
In corrosion, interfacial bond property is severely impacted.3) deadweight to beams of concrete increases larger.In recent years because fiber reinforcement is poly-
Compound（Fiber Reinforced Polymer, referred to as " FRP "）Composite has high-strength light, corrosion-resistant, construction convenient
Etc. characteristic, it is used widely in world's most countries using externally bonded FRP reinforcement sheet material reinforced concrete beam, is opened based on FRP material
The research of the various novel reinforced technology of clouding Xtah Crude Clay structure also turns into one of focus of Structural Engineering research field.Externally bonded FRP reinforcement
Sheet material reinforcement technique, that is, use adhesive（Mostly epoxy resin）By FRP sheet attachings in the bottom or side of beams of concrete, use
Bending resistance, Shear Strengthening in beams of concrete；Or fiber cloth is wrapped in concrete column surface, for improve post bearing capacity and
Ductility.
Despite the presence of foregoing advantage, the common FRP sheet materials reinforced concrete structure technology of outer patch still face in engineer applied
Face some major issues that cannot avoid：1）The rate of utilization of strength of FRP sheet materials is low；2）Opening for beams of concrete diagonal crack can not be limited
Exhibition；3）The rigidity of beams of concrete can not be lifted effectively, severely impact the normal usage energy of beams of concrete.Therefore, 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 to ftracture, limits crack developing, is effectively improved beams of concrete normal usage energy.
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 bar.The method is that a groove is opened on reinforced concrete structure is treated, installs the tensioner and FRP of FRP plate bar
Lath fixture, puts it into groove after tensioning FRP plate bar, and filling adhesive after to be bonded dose of solidification, removes tensioning equipment, from
And obtain prestressing force.Although giving applying prestressed method in this patent of invention, do not illustrate how anchoring and
Tensioning FRP plate bar.
In the patent document of Publication No. CN102304958A, disclose a kind of Strengthened With Near Surface Mounted reinforced concrete structure and use
The prestress clamp of fiber lath, including fixture housing, fixture press strip, pushing tow bolt.Make fixture press strip tight by pushing tow bolt
Fiber lath is tightly suppressed, anchorage effect is played.The anchoring process being related in the disclosure patent will slot at beam bottom in advance, 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 circular anchor ring.The device is by FRP muscle
Two ends insert 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, makes screw rod through the doughnut ring wall of stretching end, installs supporting with screw rod in circular anchor ring
Annular steel plate washer and nut, the blind end of fixing end steel sleeve is passed through the ring wall of the circular anchor ring of anchored end, and and doughnut
Boxing is connected together.The device is applied to the stretch-draw anchor of FRP muscle, for the anti-bend reinforced of beams of concrete, is not involved with mixing
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 pre-stress FRP sheet material anchored end in end
Sheet material anchors the prestressing force of end, reaches and eliminates or reduce the purpose that end stress is concentrated.Pre- answering 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 puts.The device is to set housing of three faces with steel plate in FRP cloth material end, and the both sides of housing are provided with chute.In chute
The reinforcing screw rod with pull bar is penetrated, FRP cloth material is wound on reinforcing screw rod, by the movement of chute draw-in bar to FRP cloth material
Apply prestressing force.Although the device can apply prestressing force to FRP cloth material, the Shear Strengthening of beams of concrete is not involved with
。
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, the top board with the prominent rib of correspondence position is compressed, and connected with fastening connection piece, make FRP nets
Lattice are anchored in beam body.But the Shear Strengthening without reference to beams of concrete of the device.
In sum, in existing open source literature, tensioning, the anchor of FRP muscle, FRP muscle and FRP sheet materials are related to mostly
It is entirely different at aspects such as geometric configuration, material, Physical and mechanical properties, thus can not directly by the tensioning of FRP muscle, anchoring dress
Put and be applied to FRP sheet materials.Additionally, also having no the experimental provision for being related to pre-stress FRP sheet material Shear Strengthening beams of concrete.
The content of the invention
Technical problem：The present invention provide it is a kind of make it is simple, install quick, convenient, can be with reusable pre-stress FRP
Sheet material Shear Strengthening beams of concrete experimental provision.
Technical scheme：Pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision of the invention, including beams of concrete,
Stretching bed seat just to the beams of concrete web side, the steering dress for being arranged on beams of concrete flange plate and web junction
Put, be arranged on FRP sheet materials leading section anchor, the FRP being arranged in the middle part of beams of concrete web of beams of concrete web bottom
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 are arranged on mixed
The stopping means and stabilising arrangement of solidifying soil web side, the jack being secured transverse on the stretching bed seat, positioned at described
Steel plate, the spiral shell through steel plate after the stretching end front spring and stretching end after the stretching end front spring and stretching end of jack both sides
Bar, it is arranged on FRP sheet material stretching end fixture of the screw rod adjacent to beams of concrete one end.
In preferred scheme of the invention, the transfer include being embedded into interior steering block in beams of concrete protective layer,
The outer steering block at the interior steering block two ends is bolted on respectively, after the bolt passes through interior steering block and outer steering block
Tightened with nut.
In preferred scheme of the invention, the FRP sheet materials front end anchor, FRP sheet material middle part steel press strips and FRP sheet materials
Rear end anchor structure is identical, including being embedded into the interior backing plate in beams of concrete protective layer, outer plate and expansion bolt, institute
State after expansion bolt passes through interior backing plate and outer plate and tightened with nut.
In preferred scheme of the invention, the stopping means include front spring, bearing diagonal, bottom steel plate constitute tripod,
The rubber mat plate on the outside of the front spring is arranged on, the position for adjusting beams of concrete, the stopping means is at the steel plate of bottom
Using foot bolt fastening on ground.
In preferred scheme of the invention, the FRP sheet materials stretching end fixture includes upper T-shaped intermediate plate and by bolt and upper T
T-shaped intermediate plate under the connection of type intermediate plate, the upper T-shaped intermediate plate T-shaped intermediate plate with clamps FRP sheet materials.
In preferred scheme of the invention, circular hole of the screw rod through upper T-shaped intermediate plate with on T-shaped intermediate plate uses outer limit
Position nut tighten, it is spacing.
In preferred scheme of the invention, the stabilising arrangement include upper slotting ear formula anchor, underthrust ear formula anchor,
The brace that connects the upper slotting ear formula anchor and underthrust ear formula anchor, the branch sleeve being enclosed within the brace and set
The anchor bolt on the underthrust ear formula anchor is put, the brace two ends anchor dress with upper slotting ear formula respectively by latch
Put to be installed with underthrust ear formula anchor and connect.
In preferred scheme of the invention, the upper slotting ear formula anchor is identical with underthrust ear formula anchor structure,
Including anchoring bottom steel plate and the slotting ear with circular hole being arranged on the steel plate of the anchoring bottom.
The experimental provision that the present invention is provided pastes beams of concrete side after can applying prestressing force to FRP sheet materials, plays
The effect of Shear Strengthening；The experimental provision applicable surface that the present invention is provided extensively, can be not only used for beams of concrete, girder steel, and
Go 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, and improvement is reinforced the performance of beam.
Beneficial effect：The present invention compared with prior art, with advantages below：
1. pre-stress FRP sheet material Shear Strengthening beams of concrete is realized
It is in pre-stress FRP tensioning, anchor disclosed in existing patent document and pertinent literature to relate to opening for prestressed FRP rebar more
Draw, anchor, the experimental provision in the tensioning of existing FRP sheet materials or FRP grids, anchor operation principle and the present invention
It is entirely different, also have 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 of present invention design, processes according to design requirement and assembles
After good, can be quickly installed, prestressing force is applied to FRP sheet materials and beam body side is anchored at, realize that the shearing resistance of beams of concrete adds
Gu.
2. easy construction, repeatable utilization
In the patent document of Publication No. CN101736912B, a kind of anchoring side 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, put after resin is heating and curing
Tension prestress, certain measure, release or part release pre-stress FRP piece are taken pre-stress FRP sheet material anchored end in end
Material anchors the prestressing force of end, reaches and eliminates or reduce the purpose that end stress is concentrated.Prestressing force is only related in this patent
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 puts.The device is to set housing of three faces with steel plate in FRP cloth material end, and the both sides of housing are provided with chute.In chute
The reinforcing screw rod with pull bar is penetrated, FRP cloth material is wound on reinforcing screw rod, by the movement of chute draw-in bar to FRP cloth material
Apply prestressing force.Although the device can apply prestressing force to FRP cloth material, its operation principle with it is of the invention in device it is 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, the top board with the prominent rib of correspondence position is compressed, and connected with fastening connection piece, make FRP nets
Lattice are anchored in beam body.Obviously, the operation principle of the device with the present invention in device it is entirely different.
In FRP sheet materials or the tensioning of FRP grids, anchor operation principle and the present invention disclosed in above patent document
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 terminates, package unit can be laid down, reuse, save material.
3. applied widely
The present invention does not need special installation, takes up room smaller, saves construction cost.The present invention has wide range of applications, and not only may be used
For beams of concrete and girder steel, and go for different cross section form（Rectangle, T-shaped, box）Beams of concrete or steel
The Shear Strengthening of beam.
Brief 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
It is schematic elevation view；
Fig. 2 is FRP sheet material transfer schematic diagrames in experimental provision of the present invention；
Fig. 3 is FRP sheet materials leading section anchor, FRP sheet material middle part steel press strips and FRP sheet materials rear end in experimental provision of the present invention
Anchor schematic device；
Fig. 4 is beams of concrete stopping means schematic diagram in experimental provision of the present invention, and wherein Fig. 4 a are schematic side view, and Fig. 4 b are for just
Depending on schematic diagram；
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, and Fig. 5 b are for just
Depending on schematic diagram；
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 show to face
It is intended to；
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, and Fig. 7 b are to bow
Depending on schematic diagram, 7c is schematic elevation view.
In figure：1 is beams of concrete；2 is transfer；3 is FRP sheet materials front end anchor；4 is FRP sheet materials rear end anchor
It is fixedly mounted with and puts；5 is FRP sheet materials middle part press strip；6 is stopping means；7 is stabilising arrangement；8 is foundation bolt；9 is FRP sheet materials；10 are
FRP sheet material stretching end fixtures；11 is screw rod；12 is front spring；13 is rear steel plate；14 is jack；15 is middle limit screw cap；16
It is outer anchorage nut；17 is very heavy top support；18 is polyfluortetraethylene plate；19 is stretching bed seat；20 is interior steering block；21 is outer
Steering block；22 is bolt；23 is interior backing plate；24 is outer plate；25 is expansion bolt；26 is front spring；27 is bearing diagonal；28 are
Bottom steel plate；29 is rubber mat plate；30 is upper T-shaped intermediate plate；31 be under T-shaped intermediate plate；32 is circular hole；33 is outer limit screw cap；34 are
Upper slotting ear formula anchor；35 is underthrust ear formula anchor；36 is brace；37 is branch sleeve；38 is anchor bolt；39 are
Latch；40 is anchoring bottom steel plate；41 is slotting ear.
Specific embodiment
With reference to embodiment and Figure of description, the present invention is further illustrated.
Pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision of the invention, including it is arranged on the beams of concrete edge of a wing
After transfer 2, FRP sheet materials leading section anchor 3, the FRP sheet material middle part steels press strip 5, FRP sheet materials of plate and web junction
Steel plate 13, jack 14, spacing dress after end anchor 4, FRP sheet material stretching ends fixture 10, stretching end front spring 12, stretching end
Put 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 through stretching end front spring and stretching end.
The transfer 2 includes the interior steering block 20 being embedded into the protective layer of beams of concrete 1, outer steering block 21, fixes
The bolt 22 of interior steering block 20 and outer steering block 21, the bolt 22 is twisted after passing through interior steering block 20 and outer steering block 21 with nut
Tightly.
The FRP sheet materials leading section anchor 3, FRP sheet material middle part steels press strip 5 and the knot of FRP sheet materials rear end anchor 4
Structure is identical, including being embedded into the interior backing plate 23 in the protective layer of beams of concrete 1, 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 stopping means 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 stopping means 6 is anchored at ground at bottom steel plate 28 using foundation bolt 8.
The FRP sheet materials stretching end fixture 10, including upper T-shaped intermediate plate 30, under T-shaped intermediate plate 31, the upper T-shaped intermediate plate 30,
Under T-shaped intermediate plate 31 be bolted and clamp FRP sheet materials 9.
The screw rod 11 passes through the circular hole 32 of upper T-shaped intermediate plate 30 T-shaped intermediate plate 31 with, tightened using outer limit screw cap 33,
It is spacing.
The stabilising arrangement 7 includes upper slotting ear formula anchor 34, underthrust ear formula anchor 35, brace 36, adapter sleeve
Cylinder 37 and anchor bolt 38, the brace 37 pass through latch 39 with upper slotting ear formula anchor 34 and underthrust ear formula anchor 35
Connection, the brace 37 can be rotated around latch 39, and adjustment position is connected by branch sleeve 37.Stabilising arrangement 7 is in anchoring
At bottom steel plate 35 ground is anchored at using bolt 38.
The upper slotting ear formula anchor 34 is identical with underthrust ear formula 35 structures of anchor, including anchoring bottom steel plate 40
With the slotting ear 41 with circular hole, the slotting ear 41 with circular hole passes through welding and anchoring bottom steel plate 40 is connected.
The upper slotting ear formula anchor 34 is anchored in the side of beams of concrete 1, underthrust ear formula anchor using bolt 38
35 are connected using bolt 38 with bottom steel plate 26.
The screw rod 11 passes through front spring 12 and rear steel plate 13, and limit screw cap 15 is spacing in use, uses outer anchorage nut
16 fix with rear steel plate 13.
Steel plate 13 moves right on polyfluortetraethylene plate 18 after the pushing tow of the jack 14, drives screw rod 11, FRP sheet materials
Stretching end fixture 10 and FRP sheet materials 9 are moved right jointly, and prestressing force is applied 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 is compound.
Now illustrated by taking the experiment of pre-stress FRP sheet material Shear Strengthening beams of concrete as an example：
（1）According to design requirement precast concrete beam 1 and it is installed in place.
（2）According to design requirement precast concrete beam stopping means 6 and beams of concrete stabilising arrangement 7, make in precalculated position
It is installed in place with foundation bolt 8 and bolt 38, rubber mat plate 29 is placed before the front spring 26 of stopping means 6, is adjusted, limits and steady
Determine beams of concrete 1.
（3）According to the transfer 2 of design requirement precast concrete beam flange plate and web junction, FRP sheet materials front end
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, through transfer 2, FRP sheet materials leading section anchoring dress
3, FRP sheet material middle part steels press strip 5 and FRP sheet materials rear end anchor 4 are put, 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）Place very heavy top support 17, polyfluortetraethylene plate 18 and jack 14.
（7）By FRP sheet materials pierce into upper T-shaped intermediate plate 30, under between T-shaped intermediate plate 31, tighten bolt, clamp FRP sheet materials.
（8）Moved right on polyfluortetraethylene plate 18 using steel plate 13 after the pushing tow of jack 14, drive screw rod 11, FRP
Sheet material stretching end fixture 10 and FRP sheet materials 9 are moved right jointly, and prestressing force is applied to FRP sheet materials 9.
（9）After tightening transfer 2, FRP sheet materials leading section anchor 3, FRP sheet material middle part steels press strip 5 and FRP sheet materials
Bolt on the anchor 4 of end, fixed FRP sheet materials.
（10）Keep stretching force constant, tighten middle limit screw cap 15, removal jack 14.
（11）After epoxy resin is fully cured, in FRP sheet materials rear end, the right-hand member of anchor 4 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 those skilled in the art
For, under the premise without departing from the principles of the invention, some improvement and equivalent can also be made, these are to right of the present invention
It is required that be improved with the technical scheme after equivalent, each fall within protection scope of the present invention.
Claims (8)
1. a kind of pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision, it is characterised in that the device includes beams of concrete
（1）, just to the beams of concrete（1）The stretching bed seat of web side（19）, be arranged on beams of concrete（1）Flange plate and web are handed over
Connect the transfer at place（2）, be arranged on beams of concrete（1）The FRP sheet materials leading section anchor of web bottom（3）, be arranged on
Beams of concrete（1）FRP sheet material middle part steel press strips in the middle part of web（5）, be arranged on beams of concrete（1）On the downside of flange plate outer end
FRP sheet materials rear end anchor（4）, set be arranged on beams of concrete（1）The stopping means of web side（6）And stabilising arrangement
（7）, be secured transverse to the stretching bed seat（19）On jack（14）, positioned at the jack（14）Before the stretching end of both sides
Steel plate（12）With steel plate after stretching end（13）, through the stretching end front spring（12）With steel plate after stretching end（13）Screw rod
（11）, be arranged on screw rod（11）Neighbouring beams of concrete（1）The FRP sheet material stretching end fixtures of one end（10）.
2. pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 1, it is characterised in that institute
State transfer（2）Including being embedded into beams of concrete（1）Interior steering block in protective layer（20）, respectively pass through bolt（22）It is fixed
In the interior steering block（20）The outer steering block at two ends（21）, the bolt（22）Through interior steering block（20）With outer steering block
（21）Tightened with nut afterwards.
3. pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 1, it is characterised in that institute
State FRP sheet materials leading section anchor（3）, FRP sheet material middle part steel press strips（5）With FRP sheet materials rear end anchor（4）Structure phase
Together, including being embedded into beams of concrete（1）Interior backing plate in protective layer（23）, outer plate（24）And expansion bolt（25）, it is described
Expansion bolt（25）Through interior backing plate（23）And outer plate（24）Tightened with nut afterwards.
4. pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 1, it is characterised in that institute
State stopping means（6）Including front spring（26）, bearing diagonal（27）, bottom steel plate（28）The tripod of composition, it is arranged on the preceding steel
Plate（26）The rubber mat plate in outside（29）, for adjusting beams of concrete（1）Position, the stopping means（6）In bottom steel plate
（28）Place uses foundation bolt（8）It is anchored at ground.
5. the pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 1,2,3 or 4, its feature
It is, the FRP sheet materials stretching end fixture（10）Including upper T-shaped intermediate plate（30）With by bolt and upper T-shaped intermediate plate（30）Connection
Under T-shaped intermediate plate（31）, the upper T-shaped intermediate plate（30）The T-shaped intermediate plate with（31）Clamp FRP sheet materials（9）.
6. pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 5, it is characterised in that institute
State screw rod（11）Through upper T-shaped intermediate plate（30）The T-shaped intermediate plate with（31）On circular hole（32）, use outer limit screw cap（33）Twist
Tightly, it is spacing.
7. the pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 1,2,3 or 4, its feature
It is, the stabilising arrangement（7）Including upper slotting ear formula anchor（34）, underthrust ear formula anchor（35）, connect it is described on
Insert ear formula anchor（34）With underthrust ear formula anchor（35）Brace（36）, be enclosed within the brace（36）On adapter sleeve
Cylinder（37）Be arranged on the underthrust ear formula anchor（35）On anchor bolt（38）, the brace（36）Two ends are by inserting
Pin（39）Respectively with upper slotting ear formula anchor（34）With underthrust ear formula anchor（35）Connection is installed.
8. pre-stress FRP sheet material Shear Strengthening beams of concrete experimental provision according to claim 7, it is characterised in that institute
State slotting ear formula anchor（34）With underthrust ear formula anchor（35）Structure is identical, including anchoring bottom steel plate（40）With set
Put in anchoring bottom steel plate（40）On the slotting ear with circular hole（41）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106836021A true CN106836021A (en) | 2017-06-13 |
| CN106836021B CN106836021B (en) | 2018-07-24 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710010157.6A Active 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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| Country | Link |
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| CN (1) | CN106836021B (en) |
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| CN110359380A (en) * | 2019-08-09 | 2019-10-22 | 上海悍马建筑科技有限公司 | The three-dimensional tensioning equipment of concrete foundation cushion cap prestressing force |
| CN113152920A (en) * | 2021-04-08 | 2021-07-23 | 东南大学 | Prestressed FRP plate steering device and steering method |
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