CN203117056U - Anchorage performance detection testing apparatus for carbon fiber adhesion reinforcement - Google Patents
Anchorage performance detection testing apparatus for carbon fiber adhesion reinforcement Download PDFInfo
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- CN203117056U CN203117056U CN 201320032088 CN201320032088U CN203117056U CN 203117056 U CN203117056 U CN 203117056U CN 201320032088 CN201320032088 CN 201320032088 CN 201320032088 U CN201320032088 U CN 201320032088U CN 203117056 U CN203117056 U CN 203117056U
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Abstract
The utility model discloses an anchorage performance detection testing apparatus for carbon fiber adhesion reinforcement. The testing apparatus comprises a testing bench, a concrete test piece, a test fixture, a loading system and the like. The reinforced concrete test bench is composed of a base, a blocking table, a connecting table and a stretching table, carbon fiber sheets are adhered to the test piece, and a steel pressing plate and an anchor bolt are taken as auxiliary anchoring pieces; the test fixture is composed of an external covering steel plate, inner clamping steel plates and a cross-pulling high-strength split bolt, strip-shaped steel teeth are formed on the surface of the external covering steel plate, pole steel teeth are formed on the surfaces of the inner clamping steel plates, the carbon fiber sheets are placed between the two inner clamping steel plates, the carbon fiber sheets and the two inner clamping steel plates are firmly adhered together by dipping glue, and the core-pulling high-strength split bolt clamps the external covering steel plate, the inner clamping steel plates and the carbon fiber sheets; and the loading system is composed of a connecting screw rod, a tensile connecting steel plate, a tensile screw rod, a lifting jack and a sensor. The testing apparatus provided by the utility model can quickly carry out anchorage zone stress performance test on a concrete beam reinforced by adhesion of the carbon fiber sheets, and has the advantages of being convenient to manufacture, simple to operate, and the like.
Description
Technical field
The utility model belongs to field of civil engineering, relates to a kind of detection technique of carbon fiber strengthening with external bonding, and the anchoring property that relates in particular to a kind of carbon fiber strengthening with external bonding detects test unit.
Background technology
Carbon fibre material has lightweight, excellent properties such as high-strength, corrosion-resistant, and in recent years, carbon fibre material is widely used in the civil engineering structure field of reinforcement as a kind of emerging reinforcement material.Carbon fiber reinforcement preparing structure technology is another the novel structural strengthening technology after strengthening concrete section, steel-bonded reinforcement, have and reinforce multiple advantages such as bearing capacity height, construction be convenient, be widely used in obtaining extremely remarkable economical effect and social effect in building construction, the bridge structure reinforcing engineering project.
Outer sticking carbon fibre composite is present stage to use comparatively common a kind of means to the structural strengthening of existing building.How is consolidation effect? depend primarily on two aspects: be accurate, rational Scheme of Strengthening on the one hand; Another aspect is qualified, efficient construction quality.Do not have good Scheme of Strengthening, can accurately not bring into play consolidation effect after carbon fibre fabric is pasted up; Underproof construction quality does not reach code requirement as cohesive strength, even large-area hollowing, and the carbon fiber that sticks is not reinforcement material, but has become " ornament materials ".Therefore, for pasting the carbon fiber reinforcement engineering project, tackle its Scheme of Strengthening and construction quality and carry out strict comprehensively detection and check on.
Existing carbon fiber reinforced concrete beam delivery receiving acceptance method is fairly simple, just carries out carbon fiber and pastes the scene add flatness inspection and carbon fiber cohesive strength and just drawing test to detect.Bond quality between regulation and stipulation fiber composite material and the concrete detects, available hammering method or other effective probe methods check, should be less than 95% of total bond area, in order to carry out the qualitative evaluation of carbon fiber reinforcement quality whole structure according to total effectively bond area that check result is confirmed.Regulation and stipulation is according to the carbon fiber reinforcement area, determines the sampling number that just drawing test to detect, and what require to reach carbon fiber and concrete surface just draws cohesive strength greater than 2.5MPa, carries out the quantitative detection control of carbon fiber reinforcement quality regional area.
When adopting the carbon fiber reinforcement reinforced beam, the factor that influences its consolidation effect has a lot, except carbon fibre material intensity, reinforcing dipping glue bond intensity, also have the carbon fiber stickup number of plies, the concrete strength grade of reinforcement, reinforcement shear span ratio, reinforcement end to add and assist the anchoring measure all can the load-carrying properties of carbon fiber reinforcement beam to be affected.Existing carbon fiber reinforced concrete beam acceptance specification, in detecting operation, exist certain weak point, the test of just drawing that standard is just carried out the inspection of carbon fiber reinforcement flatness and on-the-spot carbon fiber cohesive strength detects, standard adopts is just drawing test to detect the test of replacement carbon fiber plate shear bonding strength, the anchorage zone stress performance test that standard is not carried out the key position of carbon fiber strengthening with external bonding detects, and the structural fortification field is needed the anchoring property of pasting carbon fiber reinforcement badly and detected test unit.
When pasting multilayer carbon cloth or carbon fiber board reinforcement of rc beam, if do not take reasonably additional auxiliary anchoring measure, because place, crack shear stress is excessive, carbon fiber plate and concrete surface be stripping damage too early, the anchorage zone inefficacy that stripping damage will cause the carbon fiber reinforcement beam takes place to shear in case diagonal crack place, carbon fiber reinforcement girder anchorage zone territory carbon fiber is pasted the interface, the carbon fiber reinforcement girder construction is destroyed in advance, carbon fibre material does not reach its intensity during destruction, causes the carbon fiber reinforcement beam can accurately not bring into play consolidation effect.Therefore, paste the engineering project of multilayer carbon cloth or carbon fiber board reinforced concrete beam, should carry out anchorage zone stress performance test and detect, the rationality of the anchoring critical area design proposal of Carbon Fiber Sheet-Reinforced reinforced beam is pasted in checking.
When running into when pasting the more or carbon fiber board of the number of plies, paste the carbon fiber reinforcement workload big the time when running into, before formal construction goes into operation, should in time grasp the construction level of the stickup carbon fiber of construction team, must paste the level of carbon fiber tests to shear bond power, know what's what in order to accomplish, pinpoint the problems early, in order to avoid " paste carbon fiber and become decoration stickup wallpaper " construction team's phenomenon occurs, the anchoring property that carries out the carbon fiber strengthening with external bonding detects test, can set up the construction technology model, convenient management management work.
The most key problem is the quality of the adhesive property between carbon cloth and the concrete in the carbon cloth reinforced xoncrete structure technology, adopt the reliable detection method, detection validation carbon fiber reinforcement girder anchorage zone load-bearing capacity can be guaranteed carbon fiber reinforcement girder construction bearing capacity safety.Suggestion adopts the rectangular body of concrete of 300 * 300 * 1200mm as the test test specimen, test test specimen carbon fiber strengthening with external bonding, after waiting for that the special-purpose gluing of carbon fiber is hard, the transport test test specimen is to structural test inspection center, carry out carbon fiber reinforcement anchorage zone stress performance testing table and detect test, detect construction quality, the stress performance of checking carbon fiber reinforcement girder anchorage zone, the rationality of checking design proposal is so that the construction of follow-up carbon fiber reinforcement is normally carried out.
The utility model content
Technical matters: the utility model provides a kind of anchoring property of carbon fiber strengthening with external bonding easy to make, simple to operate to detect test unit, the anchorage zone stress performance that can carry out carbon fiber plate strengthening with external bonding beams of concrete fast detects test, the rationality of checking design proposal, can paste the level of carbon fiber and test to shear bonding strength, detect the construction quality of pasting carbon fiber.
Technical scheme:
A kind of anchoring property of carbon fiber strengthening with external bonding detects test unit, is made up of reinforced concrete testing bed, testing stand, reinforced concrete rectangular parallelepiped test specimen, carbon fiber plate testpieces, piggy-back anchor firmware, test fixture, connecting screw rod, stretch-draw connection steel plate, tensioning screw rod and punching lifting jack and sensor.Reinforced concrete rectangular parallelepiped test specimen is placed on the end face of reinforced concrete testing bed, testing stand, and hold out against with the retaining platform of reinforced concrete testing bed, testing stand, the carbon fiber plate testpieces sticks on reinforced concrete rectangular parallelepiped test specimen upper surface, the piggy-back anchor firmware compresses the carbon fiber plate testpieces, the afterbody of carbon fiber plate testpieces adopts test fixture to clamp, four connecting screw rods are welded on the enclosing cover surface of steel plate of test fixture, by connecting screw rod test fixture is connected steel plate to drawing connection with stretch-draw, the left part of tensioning screw rod is connected the steel plate bolt and connects with stretch-draw, the stretching bed seat preformed hole that the tensioning screw rod right-hand member passes the reinforced concrete testing bed, testing stand is connected with punching lifting jack and sensor.
The reinforced concrete testing bed, testing stand comprises pedestal, retaining platform, Lian Tai and stretching bed, the reinforced concrete testing bed, testing stand adopts the moulding of Reinforced Concrete Materials primary concreting, pedestal is positioned at the bottom of reinforced concrete testing bed, testing stand, set gradually retaining platform, Lian Tai and stretching bed on the pedestal, at the stretching bed middle part circular port is set, stretching bed the right arranges pre-embedded steel slab.
The piggy-back anchor firmware of pasting the carbon fiber reinforcement beam comprises steel bar pressing plate and anchoring peg, and the steel bar pressing plate is arranged on above the carbon fiber plate testpieces, and the two ends of steel bar pressing plate are provided with the anchoring peg, and the anchoring peg is taken root on the reinforced concrete testing bed, testing stand.
Test fixture of the present utility model comprises two blocks of enclosing cover steel plates, folder steel plate and the six roots of sensation are to drawing high strength bolt in two, the surface of enclosing cover steel plate arranges serrate strip steel-tooth, enclosing cover steel plate and strip steel-tooth are the globality finished products that adopts the metalworking machinery processing and fabricating to form, interior folder surface of steel plate welding pole steel-tooth, press from both sides between the steel plate about carbon fiber plate is placed in two and employing impregnated structures glue strong bond, two blocks of enclosing cover steel plates of folder steel plate arranged outside in two up and down, pass the preformed hole of two blocks of enclosing cover steel plates up and down to drawing high strength bolt, anchor clamps are tightened up, and the anchor clamps steel bracket supports test fixture.
Adopt the anchoring property detection test unit of carbon fiber strengthening with external bonding to detect test, may further comprise the steps:
The first step: make a plurality of reinforced concrete rectangular parallelepiped test specimens, adopt impregnated structures glue that the carbon fiber plate testpieces is sticked on reinforced concrete rectangular parallelepiped test specimen upper surface, adopt the piggy-back anchor firmware to compress the carbon fiber plate testpieces, after waiting for that the impregnated structures gluing is hard, the transport test test specimen is to structural test inspection center;
Second step: will paste test test specimen behind the carbon fiber reinforcement and be placed on end face at the reinforced concrete testing bed, testing stand, and hold out against with the retaining platform of reinforced concrete testing bed, testing stand, the afterbody of carbon fiber plate testpieces adopts test fixture to clamp, by connecting screw rod test fixture is connected the steel plate drawknot with stretch-draw and connects, tensioning screw rod and punching lifting jack and sensor are installed;
The 3rd step: start oil pump, the anchoring property that carries out the carbon fiber strengthening with external bonding detects test unit and detects test, and the record test figure is observed test specimen fastening destruction form, detects construction quality, provides test report.
The anchoring property detection test unit of carbon fiber strengthening with external bonding of the present utility model can be divided into reinforced concrete testing bed, testing stand system, test sample system, test fixture system and stretch-draw loading system and be divided into four major parts, each system synergistic working.
The reinforced concrete testing bed, testing stand is the most basic civil engineering part of test unit, the acting as of retaining platform structure withstood the test test specimen and stoped it to move, stretching bed provides trial load power, the company's of setting platform structure between retaining platform and the stretching bed, connect platform and bear pressure equilibrium retaining platform and stretching bed co-acting force, connect the stressed cantilever height that platform reduces retaining platform and stretching bed, the operating platform of the double anchor clamps of doing experiment of retaining platform.
The test sample system is made up of test test specimen, carbon fiber plate and piggy-back anchor firmware, the test test specimen adopts reinforced concrete rectangular structure form, processing and fabricating is convenient, carbon fiber plate is multilayer carbon cloth or carbon fiber sheet, carbon fiber plate sticks on test test specimen upper surface, the piggy-back anchor firmware is form or other form that keeper plate of steel adds the anchoring peg, and the test sample system has small and exquisite, the simple operation and other advantages of volume, can conveniently be transported to the structural test center.
The test fixture system forms by enclosing cover steel plate, interior folder steel plate with to drawing high strength bolt, the surface of enclosing cover steel plate arranges the strip steel-tooth, enclosing cover steel plate and strip steel-tooth are the globality finished products that adopts the metalworking machinery processing and fabricating to form, interior folder surface of steel plate welding pole steel-tooth, press from both sides between the steel plate in two about carbon fiber plate is placed on, adopt impregnated structures glue with carbon fiber plate and folder steel plate strong bond in two up and down, pass the preformed hole of two blocks of enclosing cover steel plates up and down to drawing high strength bolt, tightening bolt tightens up enclosing cover steel plate, interior folder steel plate and carbon fiber sheet anchor clamps.
The stretch-draw loading system connects steel plate, tensioning screw rod and punching lifting jack by connecting screw rod, stretch-draw and sensor is formed, the left part of 4 connecting screw rods and piece fixture steel plate are welded to connect, by connecting screw rod test fixture is connected steel plate to drawing connection with stretch-draw, stretch-draw connects steel plate the connecting screw rod pulling force is transformed into tensioning screw rod, the tensioning screw rod left part is connected die nut and connects with stretch-draw, the tensioning screw rod right part is connected with punching lifting jack and sensor, this stretch-draw loading system have stressed reliable, the acquisition test data convenient and simple operation and other advantages.
Beneficial effect: the utility model is compared with prior art, has the following advantages:
Along with carbon fiber strengthening with external bonding application and development, it is more and more to paste multilayer carbon fiber or carbon fiber board reinforcing project, more and more higher to pasting carbon fiber reinforced concrete beam body construction quality and auxiliary anchoring technical requirement, shear bonding strength test and the test of carbon fiber reinforcement anchoring property that need paste carbon fiber.
The utility model provides a kind of anchoring property test unit of carbon fiber strengthening with external bonding, pasting the level of carbon fiber tests to shear bond power, that replace to paste carbon fiber reinforcement just draws method for testing and detecting, more scientifically detect the construction quality of pasting carbon fiber reinforcement, more scientifically pass judgment on the anchoring stress performance of pasting the carbon fiber reinforcement reinforced beam.Novel test device was divided into for four most of compositions by reinforced concrete testing bed, testing stand system, test sample system, test fixture system and stretch-draw loading system, and each system synergistic working has easy to make, economical and practical and simple operation and other advantages.
Adopt the reinforced concrete building material, build testing bed, testing stand, have and make advantages such as simple, that price is low.Testing bed, testing stand is made up of pedestal, retaining platform, Lian Tai and stretching bed, connecting platform is arranged between retaining platform and the stretching bed, connect platform bear pressure can balance retaining platform and the trial load of stretching bed, Lian Taike reduces the jib-length of retaining platform and stretching bed, reduce moment of flexure internal force, and the operating platform that connects the double anchor clamps of doing experiment of platform, therefore, reinforced concrete testing bed, testing stand system has structure simple structure, stressed characteristics such as rationally.
Carbon fiber plate sticks on the reinforced concrete rectangular parallelepiped test test specimen, adopt keeper plate of steel and crab-bolt as the piggy-back anchor firmware of pasting carbon fiber, after waiting for that the special-purpose gluing of carbon fiber is hard, the transport test test specimen is to structural test inspection center, carry out carbon fiber reinforcement anchorage zone stress performance testing bed, testing stand and detect test, the rationality of checking design proposal detects construction quality.For each project under construction, just need the test test specimen after unit in charge of construction provides the stickup carbon fiber reinforcement, testing bed, testing stand and testing equipment can repeatedly reuse, advantage such as therefore, that test unit of the present utility model has is simple to operate, can repeatedly reuse, convenient management.
The pole steel-tooth of the enclosing cover steel plate strip steel-tooth of test fixture and the welding of interior folder surface of steel plate can be engaged, avoids relatively moving folder steel plate stationary positioned in guaranteeing between the two.Adopt the firm gluing carbon fiber plate of impregnated structures glue between the folder steel plate in two layers, guarantee the anchoring effect between carbon fiber plate and the interior folder steel plate; Tightening up can provide very big pressure to folder steel plate in two to drawing high strength bolt, and interior folder steel plate and carbon fiber plate have bigger friction force, can further improve anchor force between carbon fiber plate and the interior folder steel plate.Test fixture simple structure, small and exquisite, stressed reliable for each test, only needs to change the interior folder steel plate of low price, need not to change the enclosing cover steel plate of high price, and novel test fixture has characteristics such as easy to operate, economical and practical.
Connecting screw rod is welded on the enclosing cover surface of steel plate of test fixture, connect steel plate by stretch-draw the connecting screw rod pulling force is passed to tensioning screw rod, the stretching bed seat preformed hole that tensioning screw rod passes the reinforced concrete testing bed, testing stand is connected with punching lifting jack and sensor, the stretch-draw lifting jack can be tested loading, stretch-draw loading system of the present utility model has stressed reliable, simple structure, characteristics such as acquisition test data convenience.
Traditional carbon fiber bonding is just drawing test can only detect normal direction cohesive strength between carbon cloth and the concrete, can only evaluate the construction quality of pasting carbon fiber indirectly.And the level of pasting carbon fiber can directly check carbon fiber strengthening with external bonding construction quality to the test of shear bond power, can detect the anchorage zone stress performance of carbon fiber plate strengthening with external bonding beams of concrete, the rationality of checking design proposal.The anchoring property test unit of carbon fiber strengthening with external bonding of the present utility model, can detect the stressed reliability of pasting the carbon fiber reinforcement girder anchorage zone, judge whether carbon fiber anchorage zone diagonal crack place carbon fiber pastes interface generation shearing stripping damage, the auxiliary anchoring scheme rationality of multilayer carbon fiber or carbon fiber board reinforcement, the bearing capacity security of guaranteeing to paste the carbon fiber reinforced concrete reinforcement are pasted in checking.
Description of drawings
Fig. 1 is the elevational schematic view that the anchoring property of carbon fiber strengthening with external bonding detects test unit;
Fig. 2 is the elevational schematic view of the reinforced concrete testing bed, testing stand among Fig. 1;
Fig. 3 is the floor map of the reinforced concrete testing bed, testing stand among Fig. 1;
Fig. 4 is the floor plan synoptic diagram of the piggy-back anchor firmware among Fig. 1;
Fig. 5 is the mutual relationship synoptic diagram that test fixture, connecting screw rod and the stretch-draw among Fig. 1 is connected steel plate;
Fig. 6 is the elevational schematic view that the stretch-draw among Fig. 1 connects steel plate;
Fig. 7 is the diagrammatic cross-section of the test fixture among Fig. 1;
Fig. 8 is the outer cover plate floor map of the test fixture among Fig. 7;
Fig. 9 is the inner splint floor map of the test fixture among Fig. 7;
Have among the figure: reinforced concrete testing bed, testing stand 1; Pedestal 11; Retaining platform 12; Connect platform 13; Stretching bed 14; Circular port 15; Pre-embedded steel slab 16; Reinforced concrete rectangular parallelepiped test specimen 2; Carbon fiber plate testpieces 3; Piggy-back anchor firmware 4; Steel bar pressing plate 41; Anchoring peg 42; Test fixture 5; Enclosing cover steel plate 51; Strip steel-tooth 52; Interior folder steel plate 53; Pole steel-tooth 54; To drawing high strength bolt 55; Anchor clamps steel bracket 56; Connecting screw rod 6; Stretch-draw connects steel plate 7; Tensioning screw rod 8; Punching lifting jack and sensor 9.
Embodiment
Below in conjunction with Figure of description, the utility model is further described in detail.
Embodiment 1:
The anchoring property of carbon fiber strengthening with external bonding of the present utility model detects test unit, is connected steel plate 7, tensioning screw rod 8, punching lifting jack and sensor 9 and is formed by reinforced concrete testing bed, testing stand 1, reinforced concrete rectangular parallelepiped test specimen 2, carbon fiber plate testpieces 3, piggy-back anchor firmware 4, test fixture 5, connecting screw rod 6, stretch-draw.Reinforced concrete rectangular parallelepiped test specimen 2 is placed on the end face of reinforced concrete testing bed, testing stand 1, and hold out against with the retaining platform of reinforced concrete testing bed, testing stand 1, carbon fiber plate testpieces 3 sticks on reinforced concrete rectangular parallelepiped test specimen 2 upper surfaces, piggy-back anchor firmware 4 compresses carbon fiber plate testpieces 3, the afterbody of carbon fiber plate testpieces 3 adopts test fixture 5 to clamp, four connecting screw rods 6 are welded on the enclosing cover surface of steel plate of test fixture 5, by connecting screw rod 6 test fixture 5 is connected 7 pairs of steel plates with stretch-draw and draws connection, the left part of tensioning screw rod 8 is connected steel plate 7 bolts and connects with stretch-draw, the stretching bed seat preformed hole that tensioning screw rod 8 right-hand members pass reinforced concrete testing bed, testing stand 1 is connected with punching lifting jack and sensor 9.
Reinforced concrete testing bed, testing stand 1 comprises pedestal 11, retaining platform 12, connects platform 13 and stretching bed 14, reinforced concrete testing bed, testing stand 1 adopts the moulding of Reinforced Concrete Materials primary concreting, pedestal 11 is positioned at the bottom of reinforced concrete testing bed, testing stand 1, set gradually retaining platform 12 on the pedestal 11, connect platform 13 and stretching bed 14, at stretching bed 14 middle parts circular port 15 is set, stretching bed 14 the right arrange pre-embedded steel slab 16.
Piggy-back anchor firmware 4 comprises steel bar pressing plate 41 and anchoring peg 42, and steel bar pressing plate 41 is arranged on above the carbon fiber plate testpieces 3, and the two ends of steel bar pressing plate 41 are provided with anchoring peg 42, and anchoring peg 42 is taken root on reinforced concrete testing bed, testing stand 1.
Embodiment 2:
The anchoring property of using above-mentioned carbon fiber strengthening with external bonding detects test unit and detects test, may further comprise the steps:
Step 1) is made a plurality of reinforced concrete rectangular parallelepiped test specimens 2, adopt impregnated structures glue that carbon fiber plate testpieces 3 is sticked on reinforced concrete rectangular parallelepiped test specimen 2 upper surfaces, adopt piggy-back anchor firmware 4 to compress carbon fiber plate testpieces 3, after waiting for that the impregnated structures gluing is hard, the transport test test specimen is to structural test inspection center;
Step 2) above-mentioned test test specimen is placed on end face at reinforced concrete testing bed, testing stand 1, and hold out against with the retaining platform of reinforced concrete testing bed, testing stand 1, the afterbody of carbon fiber plate testpieces 3 adopts test fixture 5 to clamp, by connecting screw rod 6 test fixture 5 is connected steel plate 7 drawknots with stretch-draw and connects, tensioning screw rod 8 and punching lifting jack and sensor 9 are installed;
Step 3) starts oil pump, and the anchoring property that carries out the carbon fiber strengthening with external bonding detects test unit and detects test, and the record test figure is observed test specimen fastening destruction form, detects construction quality, provides test report.
Embodiment 3:
The anchoring property of making the carbon fiber strengthening with external bonding detects test unit, is used for the rationality and the construction quality that detects carbon fiber reinforcement of checking carbon fiber reinforcement anchoring scheme.The base plane of reinforced concrete testing bed, testing stand is of a size of 900 * 3900mm, thickness is 500mm, set gradually retaining platform, Lian Tai and stretching bed on the pedestal, retaining platform sectional dimension is 350 * 250mm, connect the platform structural section and be of a size of 400 * 200mm, the stretching bed sectional dimension is 450 * 600mm, and φ 40mm preformed hole is set at the middle part of stretching bed, and stretching bed the right embedded iron steel plate thickness is 12mm.Reinforced concrete rectangular parallelepiped sample dimensions is 300 * 300 * 1200mm, in join 4 φ, 12 longitudinal reinforcements, φ 6@200 stirrup.Carbon fiber plate method of attaching and piggy-back anchor firmware method to set up are divided into three groups, and every group of carbon fiber plate width is 100mm, wherein a group: paste two layers of thick carbon cloth of 0.168mm, do not have auxiliary anchoring measure; The b group: paste five layers of thick carbon cloth of 0.168mm, 5 road piggy-back anchor firmwares are set, adopt the thick press strip steel plate of 5mm, press strip steel plate planar dimension is 50 * 200mm steel plate, adopts φ 6mm anchoring peg; The c group: paste the thick one deck carbon fiber sheet of 1.4mm, 5 road piggy-back anchor firmwares are set, adopt the thick press strip steel plate of 8mm, press strip steel plate planar dimension is 60 * 200mm steel plate, adopts φ 14mm anchoring peg.Test fixture comprises two blocks of enclosing cover steel plates, folder steel plate and the six roots of sensation are to drawing high strength bolt in two, the surface of enclosing cover steel plate arranges 7 road strip steel-tooths, enclosing cover steel plate thickness is 16mm, strip steel-tooth height is 16mm, strip steel-tooth root is wide to be 16mm, strip steel-tooth top width is 8mm, the length of strip steel-tooth is 150mm, enclosing cover steel plate and strip steel-tooth are the globality finished products that adopts the metalworking machinery processing and fabricating to form, interior folder surface of steel plate welds 6 road pole steel-tooths, interior folder steel plate adopts the 8mm steel plate, the pole steel-tooth adopts φ 12mm round bar to process, pole steel-tooth length is 150mm, in carbon fiber plate is placed on up and down two between the folder steel plate and adopt impregnated structures glue strong bond, and two blocks of enclosing cover steel plates of folder steel plate arranged outside in two up and down, to adopt diameter be the six roots of sensation high-strength bolt of φ 16mm to drawing high strength bolt, pass the preformed hole of two blocks of enclosing cover steel plates up and down to drawing high strength bolt, anchor clamps are tightened up, the anchor clamps steel bracket supports test fixture.Adopt 4 φ 16mm fining twisted steels as connecting screw rod, the connecting screw rod left end is welded to connect on the test fixture outside surface, and the connecting screw rod right-hand member adopts bolt to be connected the steel plate connection with stretch-draw.It is inverted T-shaped that stretch-draw connects the steel plate profile, adopts the 20mm steel plate to make, and offers 5 preformed holes on the riser, and a middle hole is used for connecting tensioning screw rod, and all the other are used for fixedly connected screw rod.Tensioning screw rod adopts φ 30mm fining twisted steel to make, and the tensioning screw rod left end adopts fixed by nut to connect on the steel plate in stretch-draw, and the tensioning screw rod left end passes the stretching bed preformed hole and is connected with punching lifting jack and sensor.Adopt 50 tons of punching lifting jack, supporting punching sensor carries out the test of carbon fiber strengthening with external bonding anchoring property.For experimental safe; prevent that reinforced concrete rectangular parallelepiped test specimen afterbody after loading from sticking up; a protection system is set; adopt an angle steel to push down the afterbody of reinforced concrete rectangular parallelepiped test specimen; the two ends perforate of angle steel also arranges the bolt anchor pole, and bolt is anchor rod anchored to be fixed on the pedestal of reinforced concrete testing table.This test has obtained to complete success, the test test specimen is the carbon fibre material failure mode, has verified the stressed reliability of carbon fiber strengthening with external bonding anchorage zone, and valuable test data has been obtained in test, check stickup carbon fiber construction quality, verified the rationality of Scheme of Strengthening.
Claims (4)
1. the anchoring property of a carbon fiber strengthening with external bonding detects test unit, comprise reinforced concrete testing bed, testing stand (1), reinforced concrete rectangular parallelepiped test specimen (2), carbon fiber plate testpieces (3), piggy-back anchor firmware (4), test fixture (5), connecting screw rod (6), stretch-draw connects steel plate (7), tensioning screw rod (8) and punching lifting jack and sensor (9), it is characterized in that, reinforced concrete rectangular parallelepiped test specimen (2) is placed on the end face of reinforced concrete testing bed, testing stand (1), and hold out against with the retaining platform of reinforced concrete testing bed, testing stand (1), carbon fiber plate testpieces (3) sticks on reinforced concrete rectangular parallelepiped test specimen (2) upper surface, piggy-back anchor firmware (4) compresses carbon fiber plate testpieces (3), the afterbody of carbon fiber plate testpieces (3) adopts test fixture (5) to clamp, four connecting screw rods (6) are welded on the enclosing cover surface of steel plate of test fixture (5), by connecting screw rod (6) test fixture (5) is connected steel plate (7) to drawing connection with stretch-draw, the left part of tensioning screw rod (8) is connected steel plate (7) bolt and connects with stretch-draw, the stretching bed seat preformed hole that tensioning screw rod (8) right-hand member passes reinforced concrete testing bed, testing stand (1) is connected with punching lifting jack and sensor (9).
2. the anchoring property of carbon fiber strengthening with external bonding according to claim 1 detects test unit, it is characterized in that, described reinforced concrete testing bed, testing stand (1) comprises pedestal (11), retaining platform (12), connect platform (13) and stretching bed (14), reinforced concrete testing bed, testing stand (1) adopts the moulding of Reinforced Concrete Materials primary concreting, pedestal (11) is positioned at the bottom of reinforced concrete testing bed, testing stand (1), set gradually retaining platform (12) on the pedestal (11), connect platform (13) and stretching bed (14), at stretching bed (14) middle part circular port (15) is set, stretching bed (14) the right arranges pre-embedded steel slab (16).
3. the anchoring property of carbon fiber strengthening with external bonding according to claim 1 detects test unit, it is characterized in that, described piggy-back anchor firmware (4) comprises steel bar pressing plate (41) and anchoring peg (42), steel bar pressing plate (41) is arranged on above the carbon fiber plate testpieces (3), the two ends of steel bar pressing plate (41) are provided with anchoring peg (42), and anchoring peg (42) is taken root on reinforced concrete testing bed, testing stand (1).
4. the anchoring property of carbon fiber strengthening with external bonding according to claim 1 detects test unit, it is characterized in that, described test fixture (5) comprises two blocks of enclosing cover steel plates (51), press from both sides steel plate (53) and the six roots of sensation in two to drawing high strength bolt (55), the surface of enclosing cover steel plate (51) arranges serrate strip steel-tooth (52), interior folder steel plate (53) surface-welding pole steel-tooth (54), press from both sides between the steel plate (53) about carbon fiber plate (3) is placed in two and employing impregnated structures glue strong bond, press from both sides steel plate (53) two blocks of enclosing cover steel plates of arranged outside (51) in two up and down, pass the preformed hole of two blocks of enclosing cover steel plates (51) up and down to drawing high strength bolt (55), anchor clamps are tightened up, and anchor clamps steel bracket (56) supports test fixture (5).
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| CN 201320032088 CN203117056U (en) | 2013-01-22 | 2013-01-22 | Anchorage performance detection testing apparatus for carbon fiber adhesion reinforcement |
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| CN 201320032088 CN203117056U (en) | 2013-01-22 | 2013-01-22 | Anchorage performance detection testing apparatus for carbon fiber adhesion reinforcement |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048264A (en) * | 2013-01-22 | 2013-04-17 | 江苏华通工程检测有限公司 | Anchorage performance detection testing apparatus and method for carbon fiber adhesion reinforcement |
| CN103837383B (en) * | 2014-01-14 | 2016-03-23 | 华北水利水电大学 | Pre-stressed carbon fiber sheet material dual-flat plate ground tackle anchoring property test method |
| CN107421882A (en) * | 2017-08-28 | 2017-12-01 | 山东大学 | The steel fastener position friction testing arrangement and method of steel fastener FRP reinforcement techniques |
| CN110470549A (en) * | 2019-07-25 | 2019-11-19 | 绍兴文理学院 | Anchor structure face shearing strength dimensional effect pilot system |
| CN110514496A (en) * | 2019-09-02 | 2019-11-29 | 卡本科技集团股份有限公司 | A kind of anchorage experiment method of carbon fiber mesh reinforced concrete beam end |
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2013
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| CN103048264A (en) * | 2013-01-22 | 2013-04-17 | 江苏华通工程检测有限公司 | Anchorage performance detection testing apparatus and method for carbon fiber adhesion reinforcement |
| CN103048264B (en) * | 2013-01-22 | 2015-02-04 | 江苏华通工程检测有限公司 | Anchorage performance detection testing apparatus and method for carbon fiber adhesion reinforcement |
| CN103837383B (en) * | 2014-01-14 | 2016-03-23 | 华北水利水电大学 | Pre-stressed carbon fiber sheet material dual-flat plate ground tackle anchoring property test method |
| CN107421882A (en) * | 2017-08-28 | 2017-12-01 | 山东大学 | The steel fastener position friction testing arrangement and method of steel fastener FRP reinforcement techniques |
| CN107421882B (en) * | 2017-08-28 | 2020-04-03 | 山东大学 | Steel fastener part friction testing device and method for steel fastener FRP reinforcement technology |
| CN110470549A (en) * | 2019-07-25 | 2019-11-19 | 绍兴文理学院 | Anchor structure face shearing strength dimensional effect pilot system |
| CN110470549B (en) * | 2019-07-25 | 2021-10-22 | 宁波大学 | System for testing shear strength size effect of anchoring structure surface |
| CN110514496A (en) * | 2019-09-02 | 2019-11-29 | 卡本科技集团股份有限公司 | A kind of anchorage experiment method of carbon fiber mesh reinforced concrete beam end |
| CN110514496B (en) * | 2019-09-02 | 2022-07-12 | 卡本科技集团股份有限公司 | Anchoring test method for reinforcing end part of concrete beam by carbon fiber grids |
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