CN102922602B - Process for preparing prefabricated intelligent fiber reinforce plastic (FRP)-concrete composite structure - Google Patents
Process for preparing prefabricated intelligent fiber reinforce plastic (FRP)-concrete composite structure Download PDFInfo
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Abstract
The invention discloses a process for preparing a prefabricated intelligent fiber reinforce plastic (FRP)-concrete composite structure. The process comprises: step one, selecting a field and arranging an anchor plate of the field; step two, preparing intelligent FRP layers; step three stretching and anchoring the FRP layers; step four, manufacturing and installing formworks; step five, binding and installing a reinforcement cage and installing an anchor plate base plate; step six, pouring concrete; and step seven, anchoring the FRP layers, wherein construction members are maintained, pre-stressing force is released after the concrete strength reaches to 70-90% of the strength of the construction members, beam bottom anchoring plate top plates are anchored on beam bottom anchor plate base plates, and then the FRP layers among the formworks and anchored onto the beam bottom anchor plate base plates built on two sides through the beam bottom anchoring plate top plates. The prefabricated intelligent FRP-concrete composite structure has high load-bearing capacity and a self-sensing function and is high in durability and safety and strong in designability. The process is simple, high in production efficiency and stable in quality and is suitable for large-scale prefabrication production of factories.
Description
Technical field
The present invention relates to a kind of preparation technology of the composite concrete structure based on carbon fiber sensing, belong to smart material and structure, technical field of civil engineering.
Background technology
Precast concrete technology is the mark of suitability for industrialized production.Since 19 the end of the century precast concrete technology start to apply in engineering, precast concrete has been widely used in the engineering structure fields such as industry and civil buildings, bridge road, waterwork, tun, is bringing into play irreplaceable effect.
Precast concrete is compared with cast-in-place concrete and is mainly contained following advantage: l) good product quality.Precast concrete product major part is at produce in factory, and working condition is good, and quality is easy to control.(Basler, 1963) according to investigations, the concrete strength coefficient of variation of precast concrete plant produced is 7%, and the cast-in-place concrete strength variable coefficient that job site produces is 17%.The product of prefabricated plant produced is all more guaranteed than the concrete of cast-in-site at aspects such as intensity, density, durability, water proofing properties; Simultaneously plant produced can be used complexity, meticulous template, and the moulding of prefabricated components is full of variety, and concrete surface quality can whitewash well directly and use as clear-water concrete member.2) production efficiency is high.Precast concrete product major part is produced in the mode of mechanization for factory, automation, and production efficiency is higher than the mode of production of poured in place concrete.3) workman's working condition is good.Due to the production equipments that adopt mechanization and automation, workman's working condition and labour intensity are all better than the form of construction work of on-the-spot cast-in-place concrete more.4) little to ambient influnence.With respect to cast in situs member, precast concrete can strictly be controlled waste water, waste material and noise pollution at produce in factory.5) economize on resources, be beneficial to social sustainable development.Because plant produced precast concrete adopts Materials with High Strength and prestressing technique more, compare and can save in a large number material with common cast-in-place concrete, can also utilize in a large number waste and old concrete, slag, flyash, industrial waste etc. to produce precast concrete product.Meanwhile, the dismounting of precast concrete is also relatively easy, and after removing member reparation, recycling rate of waterused is high.These ensure that to fully rationally utilizing natural resources social sustainable development is significant.
Early stage precast concrete is mainly used in the non-structural element in building, as non-bearing wallboard, architectural decorative component etc.Along with the needs of scientific and technological development and the large production of socialization, precast concrete technology has had development rapidly, has above-mentioned plurality of advantages, can be used for bearing member.Recently, Materials with High Strength and prestressing technique in precast construction, are adopted, significantly improve the performance of precast construction, occur new structures such as the node of Large Span Prestressed Beam, flap, T-shaped plate, prestressing force splicing, and in civil engineering, be widely used, particularly at long-span bridges.
The on-the-spot also mechanization modes that adopt of installing of prefabricated components are constructed more, do not need or the little cast-in-place concrete operation of needs, have reduced the curing time of cast-in-place concrete, and convenient and quick construction, is subject to the impact of season and weather less.Utilize the concrete component of clear-water concrete member or well in advance architectural coating directly to come into operation afterwards in installation, saved fitment process.Adopt precast concrete technology, on the basis of guaranteeing construction quality, the construction period can significantly shorten, under the social desirability that labor cost increases gradually He people-oriented, thus the raising that brings overall economic efficiency.
In recent years, along with development and the renewal of material, fiber-resin composite (FRP) is used in civil engineering, its tensile strength is the more than 5 times of ordinary carbon steel, and density only has 1/3 to 1/5 of steel, and have good corrosion-resistant/durability, since exploitation, just received much attention always.Carbon fibre reinforced composite (CFRP) is a very important class in FRP composite, there is the superior mechanical property and the physical and chemical performance that exceed general fibrous material, density only has 1/4th of ordinary low-carbon steel, but hot strength has 10 times of left and right, there is the anti-fatigue performance higher than ordinary metallic material, thermal coefficient of expansion is almost nil, and corrosion resistance is good.The elastic modelling quantity (230GPa) of high-strength carbon fiber is substantially suitable with ordinary low-carbon steel, but the elastic modelling quantity of high elastic modulus carbon fiber can reach the more than 3 times of common iron and steel.In addition, carbon fiber also has good electric conductivity and piezoresistive effect.Utilize its electric property can make intelligence sensor, it has been carried out to more research both at home and abroad.Utilize the facility in its good mechanical property and construction can be used for reinforcing or reparation damaged structure, because FRP composite has good corrosion resistance, (particularly Northern Europe, the U.S. etc. need to be used the countries and regions of a large amount of snow melt salt winter) actively developing the research that replaces traditional steel (as being made into FRP muscle Transducers Embedded in Concrete) making xoncrete structure with FRP composite both at home and abroad, with the harm of avoiding corrosion of steel in concrete to be brought.Due to these characteristics of FRP, be regarded as the comparatively ideal material of one of precast prestressed concrete structure.
Although prefabricating common concrete structure is used in a large number in earthwork engineering, exist span little, from the shortcoming such as great, cracking resistance is poor; , although make span, deadweight, cracking resistance have good raising, also there are some defects in the appearance of precast prestressed concrete: 1) durability, and corrosion and the concrete carbonization etc. of presstressed reinforcing steel have a strong impact on the durability of prestressed concrete; 2) loss of prestress, pipe friction power loss (because prestressed material carries out stretch-draw in pipeline, more away from stretching end, losing larger) all has a serious impact prestressing force; 3) prefabricated quality, the quality of prestressed concrete pipe road mud jacking is difficult to be guaranteed.
And FRP-composite concrete structure, because FRP has good durability, and FRP sticks on concrete surface, can protect preferably concrete and inner reinforcing bar, hinders concrete carbonization and can ensure construction quality.But, also exist some shortcomings: 1) adhesive material utilization rate is low conventionally, and fails to make full use of the high powerful feature of FRP; 2) fragility defect, FRP is complete linear elastic materials, belongs to typical brittle break, under seismic loading, has that S. E. A. is low, ductility is not enough; 3) interface a little less than, technique relative complex.
Summary of the invention
Technical problem: the preparation technology who the object of this invention is to provide a kind of prefabricated intelligent FRP-composite concrete structure, this method for prefabricating can meet the demand of precast plant's large-scale production, and technique is simple, be applicable to batch production mechanization Prefabrication, make efficiency is high, quality guarantee rate is high.And this composite construction can fully improve the utilization rate of FRP composite, ensure the bond effect of FRP layer and xoncrete structure, reduce the consumption of concrete and reinforcing bar, alleviate the deadweight of member, improve the ductility of structure, and possess self-sensing function, farthest bring into play structural safety serviceability.This intelligence structure can be used for bridge structure and high level, greatly across in, large complicated building.And precasting process is simple, be convenient to large-scale production.
Technical scheme:
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A preparation technology for prefabricated intelligent FRP-composite concrete structure, is characterized in that: comprise the following steps:
The arrangement of the selection in the first step, place and place anchor plate: select place according to the quantity of prefabricated components, and install the place anchor plate of anchoring FRP layer on both sides, place;
The preparation of second step, intelligent FRP layer: according to the size in place, carbon fiber and other fiber are carried out to blanking, and install electrode on carbon fiber;
The stretch-draw anchor of the 3rd step, FRP layer: to FRP layer layering dipping, smearing structure glue spill the stone of particle diameter at 2.5-15mm on structure glue upper berth before the stretch-draw of FRP sheet material, stretch-draw FRP layer be anchored in place anchor plate under structure glue semi-cured state;
Making and the installation of the 4th step, template: make corresponding template according to the size of member, first install and build the template on both sides and the template of both sides, and at the template on both sides and the inner installation of the template of both sides Arc moulding board, and fix;
The installation of the colligation of the 5th step, steel reinforcement cage and installation and anchor plate base plate: good colligation steel reinforcement cage is placed in template, simultaneously in the template of both sides by beam side screw rod anchoring beam side anchor plate base plate, on Arc moulding board by anchor plate base plate at the bottom of screw rod anchoring beam at the bottom of beam;
The 6th step, casting concrete: configuration builds required concrete, and build, vibration compacting;
The 7th step, the anchoring of FRP layer: member is carried out to maintenance, treat that concrete strength reaches the 70-90% of its intensity, discharge 30% with interior prestressing force, anchor plate top board at the bottom of anchoring beam on anchor plate base plate at the bottom of beam, then cut off the FRP layer between template and template, and pass through beam side anchor plate roof bolting in building on the beam side anchor plate base plate on both sides.
In described second step, pad one deck isolated material below in the time that carbon fiber and other fiber carry out blanking.
The radian of Arc moulding board is 1/4 circular arc, and the radius of circular arc is generally and builds high 1/8-1/4.
The prefabricated intelligent FRP-composite concrete structure of the present invention mainly comprises: the composition of composite construction and design, prefabricating technique, anchorage technology.
1, the composition of composite construction and design
Composite construction is made up of intelligent FRP layer, concrete (beam/plate etc.), anchoring piece.
1) intelligent FRP layer mainly adopts the fiber hybrid of carbon fiber and high ductility.
That mentioned here mixes the connotation that comprises two aspects.
It is mixing of mechanical property on the one hand.; by mixing between variety classes carbon fiber (comprise carbon fiber kind choose, mix ratio and set and the distribution form of various fiber on cross section etc.), improve initial elastic modulus, bearing capacity and needed other performances of composite; When high modulus fibre occurs after damage, other fibers (middle modulus carbon fiber, high-strength carbon fibre or high ductility fiber) can continue to play a role, thereby make fiber hybrid composite there is good stable secondary rigidity, and the index such as its secondary rigidity, maximum load capacity and limiting strain can effectively be optimized and be controlled by rational hybrid design.
Mixing of sensing capabilities on the other hand.By mixing the fibrous material (as, fibers such as basalt fibre, glass fibre) of the high ductility of low cost, can better improve the Measurement sensibility of intelligent hybrid FRP layer, also can reduce significantly the cost of composite and structure.In addition, can effectively reduce the corresponding range of strain of intelligent hybrid FRP composite small resistor rate of change by mixing high-elastic modules carbon fibre, make resistance change rate be phase step type with strain changes simultaneously, can ensure that by rational hybrid design each resistance step is corresponding with a certain specific failure stage (form) of structure, make intelligent FRP-composite concrete structure there is the warning function based on the destroying concrete structure stage.Immingling technology is not only effectively avoided fibrous composite " fragility " defect, comprehensively improve the mechanical property of fiber hybrid composite, and optimize the self-sensing function of fiber hybrid composite, while is because carbon fiber is expensive, mix the making price that other fibers have also reduced intelligent FRP laminate, it more can be widely used in Practical Project.
2) intellectuality of FRP layer mainly utilizes piezoresistive effect and the electric conductivity of carbon fiber, according to the needs of practical structures, in FRP layer installing electrodes, then directly can carry out Real-Time Monitoring by instrument.
3) stressing conditions of actual components in the design consideration engineering of composite construction, selects suitable FRP layer and relevant anchoring piece and configures the concrete component of respective strengths, bears the suffered load of member by FRP-composite concrete structure.
2, the prefabricating technique of composite construction
Composite construction is prefabricated in precast plant, according to the design of composite construction and market demand, can carry out well personnel's allotment, and pipelining, increases work efficiency greatly, for the demand in market.
The prefabricated flow process of prefabricated components is substantially all complete at precasting yard, and industrialization labor productivity is high, and production environment is stable, and setting and the standardization of member are conducive to mechanization production, and by the standard close inspection product that dispatches from the factory, can ensure preferably prefabricated quality.Meanwhile, can carry out necessary maintenance to member.Anxiety in the situation that, can select to adopt steam curing in the duration, do like this and can save the duration.
The template that member adopts can select punching block also can select wooden model.Angle, two ends is done in the arc-shaped, reduce stress and concentrate, and FRP layer has good constraint at circular arc place to concrete.
Bonding between FRP layer and concrete adopts " wet method " bonding.Do like this and can ensure that FRP layer and concrete interface have good bonding, simultaneously constructability.
3, anchorage technology
Anchor plate is divided into anchor plate and two ends anchor plate at the bottom of beam.According to safe handling grade, the anchor plate at two positions is designed.At the bottom of beam, the safe class of anchor plate is lower than the anchor plate at two ends, in the time that reaching the 50%-80% of its tensile strength, the tension of FRP layer (specifically can design according to the concrete form of structure and performance requirement), destroying appears in the anchor plate at the bottom of beam, interface occurs peeling off and slippage simultaneously, then at the bottom of beam, the load on anchor plate is slowly transferred to two ends anchor plate, is born by two ends anchor plate.By the destruction of anchor plate at the bottom of beam and peeling off and slippage of interface, absorb energy, improve structural damage ductility.In the time that anchor plate at the bottom of beam destroys completely, there is larger distortion in structure, and ductility is fully improved.As long as there is not serious destruction in reinforced concrete member, just can replace FRP layer, anchoring again, is convenient to repair.
Anchoring is divided into the anchoring of FRP plate on anchoring that monoblock FRP plate is located at precasting yard and each member.
For monoblock FRP plate, FRP layer is exceeded to the 5%-10% of former prestressing force design load by jack tension, be then anchored on the steel plate on both sides, prefabricated place, steel plate has sufficient intensity and rigidity, prevents loss of prestress.
The anchoring of FRP plate on each member, reaches after some strength at concrete strength, puts Zhang Yiding prestressing force amount.Then the anchor plate at the bottom of anchoring beam, then puts whole prestressing force, cuts off the FRP plate between beam, and this part is anchored in to the anchor plate at two ends.
Beneficial effect:
The quality of interfacial bond property and prefabricated composite construction is fully guaranteed.Intelligence FRP layer and concrete interface pass through " wet method bonding ", and all fabrication processings all complete in precast plant, can fully ensure bond effect and the composite construction quality of FRP layer and concrete interface.
Precasting process is simple, is applicable to large area and builds.Prefabricated flow process can be divided into making and the stretch-draw of intelligent FRP layer, the making of template, the colligation of steel reinforcement cage, the anchoring of casting concrete and anchor plate.Simple technological process, is convenient to precasting yard and makes member.Mechanized production technique, more can increase work efficiency, and ensures speed of application faster, for the market demand.
Security performance has obtained abundant guarantee.Member adopts two anchor plate anchorings, and respectively there are two anchor plates at the two ends of member, one be positioned at beam at the bottom of anchoring, another is that to be positioned at beam side anchor solid.At the bottom of beam, the safe design grade of anchor plate is a little less than beam limit anchor plate, at the bottom of beam, anchoring is mainly used in the prestressed anchoring of FRP layer, the anchor plate on beam limit is mainly used in safety guarantee, and after at the bottom of beam, destroying appears in anchor plate, interface occurs peeling off or the phenomenon such as slippage, the anchor plate on beam limit is still in running order, intelligent FRP layer is still played to anchorage effect, thereby reach the effect of " no damage in small earthquake, middle shake can be repaiied; no collapsing with strong earthquake " or " badly not falling ", fully improved the security performance of member.
Recoverability is strong.Member is used for after structure, in member military service afterwards, and if there is general fatigue rupture or the destruction of recoverability, can direct replacement intelligence FRP layer.If there is larger broken the changing of loss, can the whole member of direct replacement.So just in part, total is repaired, little to the normal use influence degree of total or building.
Weak location is strengthened.The base plate anchored end of beam is weak location.By changing right angle, end into circular arc, FRP layer has good reinforcement to concrete, has reduced weak location and has occurred the possibility of destroying.
Comprehensive mechanical property is improved.Intelligence FRP layer and reinforced concrete core bonding, can significantly improve the comprehensive mechanical property of composite construction by composite intelligent FRP layer, as mechanical properties such as bearing capacity (cracking load, yield load, ultimate load etc.), secondary rigidity, antifatigue, creep resisting abilities.
The raising of anticorrosive and endurance quality.Intelligence FRP layer has excellent resist chemical performance, by can effectively preventing the corrosion of the inner reinforcing bar of intelligent FRP-composite concrete structure after bonding FRP layer, thereby improves corrosion resistance and the life cycle of composite construction.
Prestressing force and anchorage technology have been given full play to the performance characteristic of material.FRP composite has high tensile strength, and common stickup cannot have been given play to the feature that its high-tensile is high, can give full play to its material behavior such as high-strength by prestressing technique; And steel plate anchoring can prevent the slippage between intelligent FRP layer and reinforced concrete interface under larger stressing conditions, effectively reduce intelligent FRP-composite concrete structure make and military service process in loss of prestress.In addition, pre-stress FRP layer can significantly improve the ability of the anti-crack progressing after the cracking resistance ability of composite construction and crack occur; Meanwhile, prestressed apply can be to a certain degree minimizing amount of reinforcement, reduce costs.
Intellectuality has improved security and the added value of composite construction.Piezoresistive effect based on carbon fiber self and electric conductivity, make FRP-composite concrete structure have good self-monitoring function, reaches the dual-purpose effect of a material, can significantly improve security and the added value of composite construction; In addition, by prestressing force with mix non-conductive fibrous material and can significantly improve the self-sensing performance of intelligent FRP composite, stability and the precision particularly measured.In addition, by the resistance variations of monitoring carbon fiber, can monitor the loss of prestress of intelligent FRP-composite concrete structure.
Mixing of carbon fiber and other fibers, can give full play to the mechanical property of various fibers, be also more conducive to the self-sensing performance of intelligent FRP layer and composite construction, also effectively reduce the cost of FRP simultaneously, make it be applicable to being widely used in Practical Project.From economic angle, the dual-purpose material of both having saved of a material of FRP composite, has reduced cost, can create again good economic benefit simultaneously.From production angle, precasting process is simple, is convenient to prefabricated on a large scale.
Brief description of the drawings:
Fig. 1 intelligence FRP layer and anchoring schematic top plan view;
Fig. 2 " wet method " barbola work schematic diagram;
Fig. 3 place template structure of arranging schematic diagram;
Fig. 4 structure of transvers plate schematic diagram;
At the bottom of Fig. 5 steel reinforcement cage and beam and both sides base plate lay schematic diagram;
The prefabricated intelligent FRP-composite concrete structure organigram of Fig. 6.
Amount of deflection-load contrast schematic diagram of tri-kinds of different components of Fig. 7.
In figure: 1, prefabricated place, 2, intelligent FRP layer, 3, stretch-draw anchor plate, 4, template, 5, circle curve template, 6, beam cheek board, 7 side templates, 8, anchor plate base plate at the bottom of beam, 9, beam side anchor plate base plate, 10, screw rod at the bottom of beam, 11, beam side screw rod, 12 steel reinforcement cages, 13, coarse aggregate, 14 build armored concrete, and 15, electrode, 16, anchor plate top board at the bottom of beam, 17, beam side anchor plate top board, 18 armored concrete.
Detailed description of the invention:
1) making of anchor plate.
Anchor plate is divided into anchor plate and end anchorage plate at the bottom of beam.Respectively anchor plate at the bottom of beam and end anchorage plate are designed according to the design grade of load and safe design collapse state.The destruction grade of end anchorage plate higher than beam at the bottom of anchor plate, guarantee to be anchored at the bottom of beam the 50%-80% that FRP layer reaches its ultimate strength and destroy, the anchor plate at two ends is in running order all the time.
Each anchor plate includes top board and base plate.Anchor plate inner surface is made into corrugated, and suggestion ripple is 0.6-1.2mm deeply, can increase the mechanical riveted ability between intelligent FRP layer and anchor plate.Determine the perforate size on size (length, width, thickness) and the anchor plate of anchor plate according to the tension force dynamics of the size of prefabricated reinforced concrete and intelligent FRP layer.
2) colligation of steel reinforcement cage.
Distributed steel requirement according to design to member, carries out colligation to the steel reinforcement cage of concrete component, and colligation meets regulation and stipulation.
3) making of template
According to the design size of member, select and make corresponding template.Template can select punching block also can select wooden model.Template is divided into template, the template on both sides and the circle curve template (shown in Fig. 4) at base angle, both sides thereof of member both sides.The length by member of the template of both sides and wide decision, the template on both sides is by the wide and high decision of member.The radian of circle curve template is 1/4 circular arc.The radius of circular arc is generally the 1/8-1/4 of deck-molding.Suggestion circle curve template adopts punching block making to be convenient to like this fix.
4) precasting process flow process
According to the quantity of prefabricated components and size, select suitable place, site clearing is clean, and install place anchor plate (shown in Fig. 1) at two ends.
According to designing requirement, fiber is carried out to blanking, the length of blanking will meet prefabricated requirement (comprising the anchoring of fiber and the stretch-draw of jack), select kind and the size (length, width, thickness) of suitable carbon fiber (modulus, intensity) and other fiber, carbon fiber is placed in to other fiber inner side.Below fiber, pad one deck plastic paper as isolated material simultaneously, while avoiding flooding brush coating in the back, fiber and place bonding.
At the position that need to arrange electrode, first remove the size of this position carbon fiber surface according to designing requirement, then smear conducting resinl, conducting resinl is evenly smeared along carbon fiber width; In order to increase the contact-making surface of electrode and carbon fiber and to reduce the contact resistance between electrode and fiber, carbon fiber upper and lower surface is all smeared conducting resinl, to strictly control the width (being conventionally less than 0.5cm) of conducting resinl simultaneously, reduce the impact on hybrid fiber cloth mechanical property.After conducting resinl is smeared, straight placement, through removing the wire of surface oxide layer, is placed plastic paper on surface, avoid adjacent fiber cloth mutually to bond, and is unfavorable for layering impregnation.The quantity of electrode can consider according to the length of intelligent FRP layer, multiple factors such as damage positioning precision etc., and the distance between adjacent two electrodes is not less than 20cm under normal circumstances.
After electrode is made, the fiber of selecting is carried out to layering brush coating dipping, dipping scope is at the bottom of beam between anchor plate, and in the process of brush coating, fiber cloth is applied to certain pretension, ensures that fiber is all the time in straight state.
Intelligence FRP sheet material and concrete interface adopt " wet method " bonding, complete directly in FRP sheet material upper surface painting one deck structure glue Deng dipping, spill the stone (stone need water clean up) (Fig. 2 shown in) of particle diameter at 10-15mm on structure glue upper berth.
In structure glue under semi-cured state, according to the size of prestressing force design or the size of intelligent FRP ply strain, FRP plate is controlled to stretch-draw, move to while exceeding the prestressed size of original design or strain 5%-10%, stop stretch-draw, and be anchored on the steel plate anchoring piece on both sides, prefabricated place, avoid loss of prestress.To needing the position of anchor plate base plate at the bottom of mounting rail to carry out mark, and indicate corresponding aperture position.After to be marked, slowly put tension prestress.Then in the perforate of the position of mark, so that screw rod anchoring below.
Now structure glue is still under semi-cured state, stretch-draw FRP layer again, and stretch-draw amount exceedes the prestressed size of original design or strain 5%-10%, and anchoring is good again.In the template of the installation both sides, relevant position, both sides of FRP plate, the template on both sides is then installed, template is fixed.Finally put into Arc moulding board at angle, template two ends, and fix, occur the phenomenons such as slippage affecting pouring quality when the casting concrete preventing.And between the template of adjacent two members, leave certain distance, in order to the FRP layer after cutting off between adjacent forms there being enough length be anchored on the anchoring piece at beam two ends (shown in Fig. 3).The last installation quality that again checks template.
By at the bottom of the steel reinforcement cage of making in advance and beam, the anchor plate base plate on both sides all puts into template, and is plugged screw rod, screw rod one end exceeds the certain distance of base plate, for anchoring top board; The other end leaves certain length in template, does like this and can better be connected with concrete.Two base plates and screw rod are anchored in template and reinforcing steel bar cage by welding or other modes simultaneously, avoid causing two base plates and screw rod to have moving or tilt (shown in Fig. 5) in displacement in the time of casting concrete.
Check again the quality of template and the fixed mass of anchor plate base plate and screw rod, and the anchoring quality of FRP plate, to prevent occurring unnecessary accident at casting concrete.
According to designing requirement, the concrete of configuration respective strengths, and be placed in template (structure glue is now in semi-cured state), vibrated concrete, to ensure the quality of concreting.
Member is carried out to maintenance, treat that concrete strength reaches the 70-90% of its intensity, put a partial prestressing, this part prestressing force is born by interface.At the bottom of beam, anchor plate base plate brush one deck structure glue, installs top board, and good with nut anchoring.
Prestressing force is all put and opened, form removal, intelligent FRP layer between adjacent forms is cut off altogether from centre with scissors, and in intelligent FRP layer relevant position perforate can be anchored on the anchorage screw on beam both sides, then the intelligent FRP layer on anchor plate both sides at the bottom of beam is carried out to layering dipping, and in concrete surface and beam both sides anchor plate base plate brush one deck structure glue, intelligent FRP layer is well-bonded to beam limit anchor plate base plate and concrete from circular arc, and tapping is placed on screw rod to the last good top board of anchoring.
According to this, repeat the prefabricated of next group.
Adopt the two anchoring HCFRP-concrete composite beams of the present invention, under the effect of load, amount of deflection is obviously better than single anchoring HCFRP-concrete composite beam and common reinforced beam, and its test curve as shown in Figure 7.
Claims (2)
1. a preparation technology for prefabricated intelligent FRP-composite concrete structure, is characterized in that: comprise the following steps:
The arrangement of the selection in the first step, place and place anchor plate: select place according to the quantity of prefabricated components, and install the place anchor plate of anchoring FRP layer on both sides, place;
The preparation of second step, intelligent FRP layer: according to the size in place, carbon fiber and other fiber are carried out to blanking, and on carbon fiber installing electrodes;
The stretch-draw anchor of the 3rd step, FRP layer: to FRP layer layering dipping, smearing structure glue spill the stone of particle diameter at 2.5-15mm on structure glue upper berth before the stretch-draw of FRP sheet material, stretch-draw FRP layer be anchored in place anchor plate under structure glue semi-cured state;
Making and the installation of the 4th step, template: make corresponding template according to the size of member, first install the template of member two ends and both sides, and in the template inside of two ends and both sides, Arc moulding board is installed, and fix;
The installation of the colligation of the 5th step, steel reinforcement cage and installation and anchor plate base plate: steel reinforcement cage good colligation is placed in template, simultaneously in the template of both sides by member side screw rod anchoring beam side anchor plate base plate, on Arc moulding board by anchor plate base plate at the bottom of screw rod anchoring beam at the bottom of beam;
The 6th step, casting concrete: the concrete that layout structure is required, and build, vibration compacting;
The 7th step, the anchoring of FRP layer: member is carried out to maintenance, treat that concrete strength reaches the 70-90% of its intensity, discharge 30% with interior prestressing force, anchor plate top board at the bottom of anchoring beam on anchor plate base plate at the bottom of beam, then cut off the FRP layer between template and template, and pass through beam side anchor plate roof bolting on the beam side anchor plate base plate on member both sides.
2. the preparation technology of prefabricated intelligent FRP-composite concrete structure according to claim 1, is characterized in that: in described second step, pad one deck isolated material below in the time that carbon fiber and other fiber carry out blanking.
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| CN103321430B (en) * | 2013-06-07 | 2015-08-12 | 华北水利水电大学 | Pre-stressed carbon fiber sheet material is reinforced greatly across the construction method of concrete structure |
| CN104805774A (en) * | 2015-03-16 | 2015-07-29 | 济南市市政工程设计研究院（集团）有限责任公司 | Prestressing complex fiber reinforcing device for concrete slab beam and implementation process |
| CN107269021A (en) * | 2017-07-19 | 2017-10-20 | 深圳大学 | The power consumption auxiliary cushion block and reinforcement means of Shear Strengthening are carried out to concrete component |
| CN111923226B (en) * | 2020-06-02 | 2022-04-12 | 广东永基建筑基础股份有限公司 | Flat pile production method |
| CN113338364A (en) * | 2021-06-11 | 2021-09-03 | 广东工业大学 | Marine concrete reinforcing method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003176508A (en) * | 2001-12-10 | 2003-06-24 | Mitsubishi Kagaku Sanshi Corp | Frp reinforcing construction method for concrete structure |
| KR20030095463A (en) * | 2002-06-10 | 2003-12-24 | 김복일 | Method for bonding F.R.P bridge deck with ascon |
| CN1664266A (en) * | 2005-03-23 | 2005-09-07 | 卓静 | Pretensioning construction method for temporary back corrugated tooth fixture anchor |
| CN1970974A (en) * | 2005-11-24 | 2007-05-30 | 同济大学 | Construction process for pretension carbon fiber cloth reinforced concrete beam |
| CN2911057Y (en) * | 2006-03-16 | 2007-06-13 | 同济大学 | Concrete beam having partially bond prestressed FRP bars |
| CN101713252A (en) * | 2009-11-17 | 2010-05-26 | 周劲宇 | Method for reinforcing concrete structure by using prestressed fiber cloth |
| CN101736912A (en) * | 2009-12-03 | 2010-06-16 | 吴智深 | Anchorage method based on technique of bonding and reinforcement outside prestressed fiber cloth |
| CN101781936A (en) * | 2009-12-10 | 2010-07-21 | 中国建筑科学研究院 | Method and device for reinforcing beam by adopting prestressed carbon fiber plate |
| CN202370143U (en) * | 2011-11-02 | 2012-08-08 | 华北水利水电学院 | Novel carbon fiber ribbed floor |
-
2012
- 2012-11-08 CN CN201210443620.3A patent/CN102922602B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003176508A (en) * | 2001-12-10 | 2003-06-24 | Mitsubishi Kagaku Sanshi Corp | Frp reinforcing construction method for concrete structure |
| KR20030095463A (en) * | 2002-06-10 | 2003-12-24 | 김복일 | Method for bonding F.R.P bridge deck with ascon |
| CN1664266A (en) * | 2005-03-23 | 2005-09-07 | 卓静 | Pretensioning construction method for temporary back corrugated tooth fixture anchor |
| CN1970974A (en) * | 2005-11-24 | 2007-05-30 | 同济大学 | Construction process for pretension carbon fiber cloth reinforced concrete beam |
| CN2911057Y (en) * | 2006-03-16 | 2007-06-13 | 同济大学 | Concrete beam having partially bond prestressed FRP bars |
| CN101713252A (en) * | 2009-11-17 | 2010-05-26 | 周劲宇 | Method for reinforcing concrete structure by using prestressed fiber cloth |
| CN101736912A (en) * | 2009-12-03 | 2010-06-16 | 吴智深 | Anchorage method based on technique of bonding and reinforcement outside prestressed fiber cloth |
| CN101781936A (en) * | 2009-12-10 | 2010-07-21 | 中国建筑科学研究院 | Method and device for reinforcing beam by adopting prestressed carbon fiber plate |
| CN202370143U (en) * | 2011-11-02 | 2012-08-08 | 华北水利水电学院 | Novel carbon fiber ribbed floor |
Non-Patent Citations (2)
| Title |
|---|
| FRP粘贴结构加固中的几个关键问题和技术;吴智深;《建筑结构》;2-8至2-13;20070715;第37卷;2-8至2-13 * |
| 吴智深.FRP粘贴结构加固中的几个关键问题和技术.《建筑结构》.2-8至2-13,2007,第37卷 |
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