CN204644890U - The external prestressing intelligence Strengthening and Monitoring system of Hollow Slab Beam Bridge - Google Patents
The external prestressing intelligence Strengthening and Monitoring system of Hollow Slab Beam Bridge Download PDFInfo
- Publication number
- CN204644890U CN204644890U CN201520276483.8U CN201520276483U CN204644890U CN 204644890 U CN204644890 U CN 204644890U CN 201520276483 U CN201520276483 U CN 201520276483U CN 204644890 U CN204644890 U CN 204644890U
- Authority
- CN
- China
- Prior art keywords
- bridge
- frp rebar
- prestressed frp
- strengthening
- monitoring system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 238000005728 strengthening Methods 0.000 title claims description 24
- 239000000835 fiber Substances 0.000 claims abstract description 30
- 239000013307 optical fiber Substances 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000009826 distribution Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 241000209094 Oryza Species 0.000 claims description 8
- 235000007164 Oryza sativa Nutrition 0.000 claims description 8
- 235000009566 rice Nutrition 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 abstract description 7
- 238000005336 cracking Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 20
- 230000002787 reinforcement Effects 0.000 description 14
- 238000012423 maintenance Methods 0.000 description 13
- 230000035882 stress Effects 0.000 description 11
- 238000010276 construction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 210000003205 muscle Anatomy 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 239000004567 concrete Substances 0.000 description 4
- 201000010099 disease Diseases 0.000 description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 210000002435 tendon Anatomy 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model provides the monitoring system of Hollow Slab Beam Bridge, and monitoring system comprises the data transmission cable of the prestressed FRP rebar of optical fiber built-in grating strain transducer, connecting fiber grating strain transducer and fiber grating signal demodulating system; Described prestressed FRP rebar is distributed in upper end face and the bottom surface of hollowcore slab, and distribution arrangement is vertical with bridge length direction, distributing position be bridge length direction span centre, 1/4 across, 3/4 across, 1/8 across with 7/8 span centre at least any one.The utility model adopts the prestressed FRP rebar with excellent mechanical property, and the prestressed FRP rebar built-in fiber bragg grating strain transducer of master control section part at bridge, significantly improve carrying and the cracking resistance of old bridge, and Real-Time Monitoring is carried out to the force-bearing situation of prestressed FRP rebar, intelligent evaluation is carried out to the later stage military service situation of bridge, reliability, durability and supporting capacity.
Description
Technical field
The utility model relates to bridge construction field of engineering technology, especially, relates to a kind of external prestressing intelligence Strengthening and Monitoring system using the Hollow Slab Beam Bridge of the prestressed FRP rebar of optical fiber built-in grating strain transducer.
Background technology
Assembling Hollow Slab Beam Bridge is a widely used type in China's beam bridge, have building height little, from heavy and light, easy construction, the advantage such as speed of application is fast, assemblingization degree is high, very thin attractive in appearance, the structure section reasonable stress of bridge, in highway in China traffic forms, there is very important status.The bridge design standard of early stage construction is on the low side, along with the increase of expanding economy, Heavy Traffic amount, management and the deficiency of maintenance, bridge durability difference and year the reason such as aging for a long time, reinforced concrete hollow slab appearance Lack of support in various degree, hollowcore slab hinge seam longitudinal cracking, beam body occurs that crack, base plate hinge seam concrete are loose, peels off, the phenomenon such as infiltration.There is the situation that between precast plate, hinge seam destroys in domestic a lot of Hollow Slab Beam Bridge, serious even appearance " single slab bearing ", makes the supporting capacity of Hollow Slab Beam Bridge greatly decline after putting into effect.The major way of hollowcore slab lateral connection has: hinged seam connects, apply transverse prestress connection, plain bars connection, diaphragm connection etc.
For the disease that the monolithic packaged type bridges in operation occurs, also in succession take in the industry series of measures and strengthen maintenance is carried out to disease bridge, such as current Enlargement of Section, bonding steel plate method, stickup fibrous composite reinforcing method, external prestressing strengthening method, the large class of change structure system reinforcing method five.Increasing section reinforcing method is the section area taking to increase concrete structure or structure, improve structural bearing capacity and meet the normal a kind of reinforcement means used, but the method needs formwork, build and the construction sequence such as maintenance, the strengthening construction cycle is long, and increase member section, quality and rigidity there occurs change, and the intrinsic frequency of structure is also changed thereupon, and structure can be caused to a great extent in the covibration of earthquake and wind center of percussion.Reinforcement by sticking of sheets improves the bearing capacity of structure to a certain extent, but its validity of reinforcing depends primarily on intensity and the durability of binding material.CFRP Sheet Strengthening Method is issued in the situation not increasing structure loading and reinforces object efficiently, and has the advantage of resistance to chemical attack.Above method is owing to being subject to the impact of form of structure or material behavior, and these conventional methods all have certain limitation.And do not solve the maintenance in later stage, maintenance problem, can not monitor reinforcement bridge in real time, be unfavorable for the judgement to bridge security performance.
The prestress wire that traditional external prestressing strengthening adopts or prestressed reinforcement are subject to environmental corrosion and lost efficacy, for extending structure service life, external prestressing strengthening method initiatively applies external force by setting up external prestressing tendon in the bottom of bridge board to existing beam body, improves the reinforcement means of the force-bearing situation of original structure.
Chinese patent CN 203007856 provides the external prestressing strengthening system of hollow slab beam, prestress wire and prestressed reinforcement is adopted to reinforce the upper end face of hollow slab beam and bottom surface, but the corrosion resistance of employing material is strong, tensile strength is not high, can not carry out intelligent evaluation to the long-term operation situation of bridge.
Chinese patent CN 102352606 provides road hinged hollow slab bridge transverse reinforcement means, it utilizes and overlays bridge pave-load layer, improve pave-load layer reinforced steel bar strength, lateral prestressing tendon is set in spanning to reach the effect of bridge strengthening below top board simultaneously, but overlay the deadweight that layer of concrete adds bridge, prestressed strand does not adopt the material that anti-corrosion effects is good yet.
Chinese patent CN103061271 provides hollowcore slab single slab bearing reinforcement means, at the upper surface of hollowcore slab and soffit along vertical bridge to keeping at a certain distance away, laterally pasting strip steel plate, slip casing by pressure being carried out to the cavity in beam seam simultaneously, end face implants shear reinforcement, arranges steel mesh reinforcement.The method of pasting steel bar depends on the durability of cementing agent to a great extent, and construction sequence is more complicated, long construction period.
Chinese patent CN 202247710 provides the structure that a kind of uninterrupted traffic strengthens exist curves hollowcore slab lateral ties, filling adhesive in the hinge seam of hollowcore slab, hollowcore slab base plate arranges a strengthening course, and strengthening course is steel mesh reinforcement mortar strengthening course, strengthens the lateral ties of bridge.The method mainly gets down to the process of hollowcore slab hinge seam, and consolidation effect is good and curing time is short.
Chinese patent CN 103774565 provides a kind of longitudinal prestressing reinforcement means of Hollow Slab Beam Bridge, fold line shape prestressed reinforced bars according to design installs route, steering gear is utilized to assist the angle position connecing horizontal segment and tilting section, external prestressing steels selects steel strand, is not guaranteed in durability.
To sum up, still lack in the industry that a kind of corrosion resistance is strong, tensile strength is high, and the maintenance in later stage, the Hollow Slab Beam Bridge reinforcement means of maintenance problem can be solved simultaneously.
Utility model content
The utility model object is to provide a kind of external prestressing intelligence Strengthening and Monitoring system using the Hollow Slab Beam Bridge of the prestressed FRP rebar of optical fiber built-in grating strain transducer, to solve the technical problem of Hollow Slab Beam Bridge reinforcing, maintenance, maintenance, monitoring.
For achieving the above object, the utility model provides a kind of external prestressing intelligence Strengthening and Monitoring system of Hollow Slab Beam Bridge, comprises the data transmission cable of the prestressed FRP rebar of optical fiber built-in grating strain transducer, connecting fiber grating strain transducer and fiber grating signal demodulating system;
Described prestressed FRP rebar is distributed in upper end face and the bottom surface of hollowcore slab, and distribution arrangement is vertical with bridge length direction, distributing position be bridge length direction span centre, 1/4 across, 3/4 across, 1/8 across with 7/8 span centre at least any one.
Preferably, the distance at interval of 2-5 rice lays common prestressed FRP rebar.
Preferably, described fiber grating signal demodulating system is installed on bottom the outer edge of a wing of side bar.
Preferably, described prestressed FRP rebar is distributed in upper end face, the bottom surface of hollow slab beam base plate and hollowcore slab, the prestressed FRP rebar being positioned at end face on hollowcore slab is fixed on anchoring angle steel by expansion bolt, the prestressed FRP rebar being positioned at hollowcore slab bottom surface is fixed on anchor plate by expansion bolt, and the prestressed FRP rebar being positioned at hollow slab beam base plate adopts bonding crab-bolt to fix.
Preferably, described in be positioned at the prestressed FRP rebar of end face on hollowcore slab spacing distance be 2-3 rice, the spacing distance being positioned at the prestressed FRP rebar of hollowcore slab bottom surface is 0.5-1 rice.
The utility model has following beneficial effect:
For plain bars or steel strand perishable under the effect of external environment condition, affect the problem of the durability of structure, the application proposes FRP muscle and replaces plain bars or steel strand, FRP muscle has that tensile strength is high, the characteristic of light weight, corrosion-resistant, antifatigue, adopt Novel light high-strength degree FRP muscle can effectively prevent wind from shaking bridge disaster that effect causes, greatly enhances the application life of bridge.
The utility model to the prestressed FRP rebar fixedly with excellent mechanical property in pontic outer lateral, makes separate type girder become box-type section, adds the lateral stiffness of whole beam bridge.And the prestressed FRP rebar built-in fiber bragg grating strain transducer of master control section part at bridge.It is low that fiber Bragg grating strain sensor has loss, electromagnetism interference and corrosion resistance, be suitable for long range propagation and monitoring, adopt fiber Bragg grating strain sensor to carry out Real-Time Monitoring to the force-bearing situation of rinforcement bar, be convenient to the service behaviour after grasping bridge strengthening in time.
Fiber Bragg grating strain sensor connecting fiber grating signal demodulating system, Real-Time Monitoring is carried out to the force-bearing situation of prestressed FRP rebar, intelligent evaluation is carried out to the later stage military service situation of bridge, reliability, durability and supporting capacity, early warning signal is sent, for the further maintenance of bridge, Maintenance and Management decision-making provide foundation and guidance when bridge operation situation severely subnormal.
Further, the short construction period of the application, in bridge strengthening transformation, reduces former bridge under-clearance height hardly, does not also require original structure surfacing simultaneously, do not affect the outward appearance of structure.
Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is that the overall situation of the external prestressing intelligence Strengthening and Monitoring system of the Hollow Slab Beam Bridge of the utility model preferred embodiment arranges schematic diagram;
Fig. 2 is that the prestressed FRP rebar of the utility model preferred embodiment is at upper end face and the bottom surface of hollow slab beam and the layout schematic diagram that is connected with fiber grating signal demodulating system;
Fig. 3 is that the transverse prestress of the utility model preferred embodiment stitches the end each stress components maximum value graph of relation with hinge;
Fig. 4 is the intelligent evaluation flow chart of the fiber grating signal demodulating system of the utility model preferred embodiment;
Wherein, 1, prestressed FRP rebar, 2, fiber Bragg grating strain sensor, 3, data transmission cable, 4, fiber grating signal demodulating system, 5, expansion bolt, 6, anchoring angle steel, 7, anchor plate, 8, cohere spiral bolt, 9, end face on hollowcore slab, 10, hollowcore slab bottom surface.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can limit according to claim and cover is implemented.
See Fig. 1, Fig. 2, this application provides a kind of external prestressing intelligence Strengthening and Monitoring system of Hollow Slab Beam Bridge, comprise the data transmission cable 3 of the prestressed FRP rebar 1 of optical fiber built-in grating strain transducer 2, connecting fiber grating strain transducer 2 and fiber grating signal demodulating system 4; Described prestressed FRP rebar is distributed in end face 9 and hollowcore slab bottom surface 10 on hollowcore slab, and distribution arrangement is vertical with bridge length direction, distributing position be bridge length direction span centre, 1/4 across, 3/4 across, 1/8 across with 7/8 span centre at least any one.
Wherein, on hollowcore slab, the prestressed FRP rebar 1 of end face is fixed on anchoring angle steel 6 by expansion bolt 5, and the prestressed FRP rebar 1 of hollowcore slab bottom surface is fixed on anchor plate 7 by expansion bolt 5.Also cohere spiral bolt 8 can be adopted to fix prestressed FRP rebar according to a determining deviation at hollowcore slab bottom surface, play vibration damping and only shake.
(laterally referring to the width of bridge) presstressed reinforcing steel is used laterally to reinforce outward at pontic, the shear strength of hinge seam is strengthened by applying transverse prestress, the transverse prestress set up makes the horizontal lower edge concrete of hollowcore slab be in pressured state, balance the transverse bending moment that external load produces, because this enhancing the transverse splicing performance of hollow slab bridge, prevent hinge seam and pave-load layer longitudinal cracking, even if there is crack disease, also can suppress disease deterioration.External transverse prestress reinforce have that construction technology is simple, interference traffic is few, equipment needed thereby is simple, human input is few, the duration is short, little to original structure damage, and have the advantages that not affect under-clearance and do not increase grade elevation.
Theoretical based on assembly hollow slab bridges load relieving system, utilize Finite Element that space structures is separated into junior unit, carry out accurate space Structure Analysis, and the supporting capacity of reinforcing front and back hollowcore slab is contrasted:
(1) transverse prestress is to the impact analysis of hinge seam stress
Consider under one-level load action, transverse prestress stitches the end each stress components maximum value graph of relation as shown in Figure 3 with hinge.As shown in Figure 3, hinge seam bottom maximum transversal tensile stress affects very large by transverse prestress, and along with the increase of transverse prestress, the maximum tension stress value of hinge seam bottom reduces gradually.Under the effect of prestressing force horizontal bar, the stress of hinge seam bottom is improved, and prevents the cracking of hinge seam.
(2) transverse prestress applies the impact analysis of position
Assembling Hollow Slab Beam Bridge, before not ftractureing, mainly through mating formation and cutting with scissors seam Transfer of Shear, applies transverse prestress and can improve the lateral stressed performance of hinge seam.Meanwhile, the impact of applying position on hinge seam maximum transversal tensile stress value of transversely prestressed bars is also very important, by setting up different operating mode to compare the impact applying position:
Operating mode 1: do not apply transverse prestress;
Operating mode 2: span centre applies the transverse prestress of 100kN;
Operating mode 3: L/4 across with 3L/4 across the transverse prestress applying 50kN respectively;
Operating mode 4: L/8 across with 7L/8 across the transverse prestress applying 50kN respectively;
Under the operating mode of different applying positions, hinge seam end maximum transversal tensile stress sees the following form shown in 1:
Know from upper table data, apply transverse prestress and can reduce maximum tension stress value in hinge seam.Along with Shi Hanzhang position is away from span centre, maximum tension stress value amplitude of variation reduces, and better at the consolidation effect of span centre applying transverse.Therefore know from computational analysis, for promoting Hollow Slab Beam Bridge strength performance and endurance quality, the utility model select 1/2 across, 1/4 across, 3/4 across, 1/8 across, 7/8 lay the prestressed FRP rebar of built-in fiber bragg grating strain transducer across place, other distance at interval of 2-5 rice lays common prestressed FRP rebar, can promote the supporting capacity of Hollow Slab Beam Bridge to a great extent.
Be understandable that, the beam bridge that span is less, the spacing of 2-5 rice is just included within above operating mode, also just without the need to additionally adding common prestressed FRP rebar.
Prestressed FRP rebar 1 built-in fiber bragg grating strain transducer 2 of the application, fiber Bragg grating strain sensor 2 passes through data transmission cable 3 connecting fiber grating signal demodulating system 4, by data-signal real-time Transmission and storage.Fiber grating signal demodulating system 4 is installed on bottom the outer edge of a wing of side bar, and this system comprises signal detection module, Data acquisition and storage module, Gernral Check-up and man-rate module, warning module etc.Fiber grating signal demodulating system 4, by the Acquire and process analysis to sensing data, realizes the monitoring of prestressed FRP rebar force-bearing situation, and carries out intelligent evaluation to the later stage military service situation of bridge, reliability, durability and supporting capacity.Evaluation criteria is the technical standard such as " highway bridge and culvert maintenance technology specification ", " highway bridge reinforcement construction technology specification ", and intelligent evaluation flow process as shown in Figure 4, exceeds safe range then early warning at the numerical value obtained.
The application achieves the globality of structure, not only significantly improves carrying and the cracking resistance of old bridge, simultaneously can the safe condition of Real-Time Monitoring bridge, solves existing highway bridge hollowcore slab structure maintenance great efforts, the deficiency that potential safety hazard is large.
The preparation method of the prestressed FRP rebar of the optical fiber built-in grating strain transducer used in the application is as following.Arrange at the fiber roving of the common prestressed FRP rebar of preparation, infiltrate on resin, preformed, extrusion molding, solidification, traction, cutting, goods step basis, send optical fiber built-in grating strain transducer to preforming tool together with the fibrous material infiltrating epoxy resin;
Before preforming step, comprise preheating step, described preheat temperature is 150 DEG C ~ 180 DEG C, and preheating time is 15 ~ 20 minutes;
Described cooling curing step is carried out in magnetic field, and magnetism intensity is 3800Gs-6500Gs.
Wherein, according to Biot-Savart law: dB=μ
0isin α dl/4 π r
2,
DB is the magnetic induction intensity that current elements P produces at space P point; R is the distance between current elements and P point;
μ
0for constant; α is the angle with r two vector;
From this law, the direction of molecular resin in magnetic field will affect induced field intensity, and be namely the size of magnetic susceptibility, therefore vertical magnetic field is maximum in the magnetic susceptibility of key plane.The application preferably adopts the magnetic direction perpendicular to prestressed FRP rebar to carry out cooling curing, improves FRP muscle axial property.
Through the FRP muscle pultrusion molding process of magnetic field solidification, its special character had is: different moulding process has different optimum magnetic field intensity, general range is between 3800Gs ~ 6500Gs, and the interlaminar shear strength of FRP and compressive strength all obtain the raising of more than 10%.In addition, magnetic field curing process can improve the performance of resin in FRP muscle, improves the durability of RP muscle, and this is very important to the life of the external prestressing steels exposed.
The application selects in the technique of traditional pultrusion, add preheating and apply two, magnetic field activities, the fiber infiltrating resin carries out preheating through preheating procedure, make resin generating portion gel reaction wherein, then process through magnetic field, molecular resin orientation is fixed, reduce in heating mould that fuel factor is to the destruction of molecular resin orientation, because magnetic field has directionality to FRP composite property improvement result, maximum improvement direction is vertical magnetic field direction.
Optical fiber built-in grating strain transducer sends drawing mould to together with the fibrous material of saturated ring epoxy resins, becomes as a whole under the influence of a magnetic field by heating, solidification, cooling.After being embedded with the FRP intellectual rib of fiber Bragg grating strain sensor by design length drawing, utilize fiber anisotropic feature to be stripped out by the tail optical fiber of optical fiber grating sensing element, welding wire jumper head, finally becomes muscle.Wherein the proportioning of muscle material reinforcing material is: content of glass fiber is that between 45% ~ 60%, reinforced fiber content is between 55% ~ 40%.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. an external prestressing intelligence Strengthening and Monitoring system for Hollow Slab Beam Bridge, is characterized in that, comprise the data transmission cable of the prestressed FRP rebar of optical fiber built-in grating strain transducer, connecting fiber grating strain transducer and fiber grating signal demodulating system;
Described prestressed FRP rebar is distributed in upper end face and the bottom surface of hollowcore slab, and distribution arrangement is vertical with bridge length direction, distributing position be bridge length direction span centre, 1/4 across, 3/4 across, 1/8 across with 7/8 span centre at least any one.
2. external prestressing intelligence Strengthening and Monitoring system according to claim 1, it is characterized in that, on bridge length direction, the spacing distance of common prestressed FRP rebar is 2-5 rice.
3. external prestressing intelligence Strengthening and Monitoring system according to claim 1, it is characterized in that, described fiber grating signal demodulating system is installed on bottom the outer edge of a wing of side bar.
4. external prestressing intelligence Strengthening and Monitoring system according to claim 1, it is characterized in that, described prestressed FRP rebar is distributed in upper end face, the bottom surface of hollow slab beam base plate and hollowcore slab, the prestressed FRP rebar being positioned at end face on hollowcore slab is fixed on anchoring angle steel by expansion bolt, the prestressed FRP rebar being positioned at hollowcore slab bottom surface is fixed on anchor plate by expansion bolt, and the prestressed FRP rebar being positioned at hollow slab beam base plate adopts bonding crab-bolt to fix.
5. external prestressing intelligence Strengthening and Monitoring system according to claim 1, it is characterized in that, the described spacing distance being positioned at the prestressed FRP rebar of end face on hollowcore slab is 2-3 rice, and the spacing distance being positioned at the prestressed FRP rebar of hollowcore slab bottom surface is 0.5-1 rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520276483.8U CN204644890U (en) | 2015-04-30 | 2015-04-30 | The external prestressing intelligence Strengthening and Monitoring system of Hollow Slab Beam Bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520276483.8U CN204644890U (en) | 2015-04-30 | 2015-04-30 | The external prestressing intelligence Strengthening and Monitoring system of Hollow Slab Beam Bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204644890U true CN204644890U (en) | 2015-09-16 |
Family
ID=54097648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520276483.8U Expired - Fee Related CN204644890U (en) | 2015-04-30 | 2015-04-30 | The external prestressing intelligence Strengthening and Monitoring system of Hollow Slab Beam Bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204644890U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382894A (en) * | 2016-11-09 | 2017-02-08 | 哈尔滨工程大学 | Fiber grating multidirectional sensor |
| CN108660947A (en) * | 2018-04-23 | 2018-10-16 | 河海大学 | A kind of reinforcing device and method of concrete hollow slab girder bridge longitudinal crack |
| CN109235922A (en) * | 2018-10-30 | 2019-01-18 | 武汉地震工程研究院有限公司 | Based on the structural strengthening and many reference amounts synchronous monitoring device from perception carbon cloth |
| CN109356043A (en) * | 2018-11-21 | 2019-02-19 | 南京铁道职业技术学院 | Existing hollow slab girder single slab bearing reinforcing construction and reinforcement means |
| CN110173078A (en) * | 2019-06-18 | 2019-08-27 | 中复碳芯电缆科技有限公司 | A kind of building field intelligent composite reinforcing rib |
| CN110866302A (en) * | 2019-11-19 | 2020-03-06 | 河北工业大学 | FRP bending-resistant reinforcement design method based on member early warning wire theory |
| CN111157158A (en) * | 2020-01-06 | 2020-05-15 | 中国建筑第八工程局有限公司 | Detection and analysis method for residual stress of prestressed structure |
| CN114135118A (en) * | 2021-12-09 | 2022-03-04 | 同济大学 | FRP prestress monitoring and adjusting device and method capable of realizing intelligent service |
| CN117005544A (en) * | 2023-10-07 | 2023-11-07 | 中国船舶集团国际工程有限公司 | Self-sensing bidirectional prestress regulation and control system of large-span truss, large-span truss and installation method |
-
2015
- 2015-04-30 CN CN201520276483.8U patent/CN204644890U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106382894A (en) * | 2016-11-09 | 2017-02-08 | 哈尔滨工程大学 | Fiber grating multidirectional sensor |
| CN106382894B (en) * | 2016-11-09 | 2018-12-25 | 哈尔滨工程大学 | A kind of fiber grating multidimensional sensor |
| CN108660947A (en) * | 2018-04-23 | 2018-10-16 | 河海大学 | A kind of reinforcing device and method of concrete hollow slab girder bridge longitudinal crack |
| CN109235922A (en) * | 2018-10-30 | 2019-01-18 | 武汉地震工程研究院有限公司 | Based on the structural strengthening and many reference amounts synchronous monitoring device from perception carbon cloth |
| CN109356043A (en) * | 2018-11-21 | 2019-02-19 | 南京铁道职业技术学院 | Existing hollow slab girder single slab bearing reinforcing construction and reinforcement means |
| CN110173078A (en) * | 2019-06-18 | 2019-08-27 | 中复碳芯电缆科技有限公司 | A kind of building field intelligent composite reinforcing rib |
| CN110866302A (en) * | 2019-11-19 | 2020-03-06 | 河北工业大学 | FRP bending-resistant reinforcement design method based on member early warning wire theory |
| CN111157158A (en) * | 2020-01-06 | 2020-05-15 | 中国建筑第八工程局有限公司 | Detection and analysis method for residual stress of prestressed structure |
| CN114135118A (en) * | 2021-12-09 | 2022-03-04 | 同济大学 | FRP prestress monitoring and adjusting device and method capable of realizing intelligent service |
| CN114135118B (en) * | 2021-12-09 | 2022-08-09 | 同济大学 | FRP prestress monitoring and adjusting device and method capable of realizing intelligent service |
| CN117005544A (en) * | 2023-10-07 | 2023-11-07 | 中国船舶集团国际工程有限公司 | Self-sensing bidirectional prestress regulation and control system of large-span truss, large-span truss and installation method |
| CN117005544B (en) * | 2023-10-07 | 2023-12-15 | 中国船舶集团国际工程有限公司 | Self-sensing bidirectional prestress regulation and control system of large-span truss, large-span truss and installation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204644890U (en) | The external prestressing intelligence Strengthening and Monitoring system of Hollow Slab Beam Bridge | |
| Schranz et al. | Strengthening and prestressing of bridge decks with ribbed iron-based shape memory alloy bars | |
| CN108914760A (en) | Consider the box beam and its prestress strengthening method of external prestressing strengthening | |
| CN106013432B (en) | A kind of high ductility prefabricated integral frame interior joint connection structure and construction method | |
| CN103046478B (en) | Strengthening and pulling device of hinge gap of compositional plate girder bridge | |
| CN103485281B (en) | A kind of construction method of assembled external transverse prestress hollow slab bridge | |
| CN208899301U (en) | Consider the box beam of external prestressing strengthening | |
| CN203741730U (en) | T-shaped bridge reinforcing structure | |
| CN103114524A (en) | Light type wave-shaped steel and high-strength activity powder concrete composite bridge panel | |
| CN103255720A (en) | Method for assembled integral type reinforced concrete slab bridge | |
| CN103195259A (en) | Foam concrete prefabricated slab and method for reinforcing concrete structure by same | |
| CN108442227A (en) | One kind preventing deck crack hollow slab bridge structure and attaching method thereof | |
| Waldron et al. | Demonstration of use of high-performance lightweight concrete in bridge superstructure in Virginia | |
| KR101432087B1 (en) | Composite rahman bridge using preflex beam and horizontal shear connectors and construction method thereof | |
| Recupero et al. | Increasing the capacity of existing bridges by using unbonded prestressing technology: a case study | |
| Fehling et al. | Gärtnerplatz–Bridge over River Fulda in Kassel: Multispan Hybrid UHPC‐Steel Bridge | |
| CN209555757U (en) | A kind of recoverable prefabricated assembled bridge pier of function | |
| D'Antino et al. | Fatigue tensile testing of glass fiber-reinforced polymer reinforcing bars | |
| CN103410090A (en) | Suspender anchoring structure of initiative-reinforcement concrete tied-arch bridge and construction method thereof | |
| Zhang et al. | Strengthening of a reinforced concrete bridge with a composite of prestressed steel wire ropes embedded in polyurethane cement | |
| CN105178165B (en) | Tension face layer compound-reinforced reinforced concrete continuous rigid frame bridge and construction method thereof | |
| CN203546578U (en) | Fabricated external transverse prestress hollow slab bridge | |
| CN202849924U (en) | Corrugated steel web plate concrete continuous box girder for curved bridge | |
| CN105088933A (en) | Hollow slab bridge with inclined hinge joint and building method thereof | |
| CN108824830A (en) | Bracing means and its design method at a kind of steel column bolt joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No.168, Section 2, Yanhe Road, Wangcheng economic and Technological Development Zone, Changsha City, Hunan Province Patentee after: Hunan Lianzhi Technology Co.,Ltd. Address before: 410019 Yanhe Road, Wangcheng Economic Development Zone, Changsha City, Hunan Province Patentee before: HUNAN LIANZHI BRIDGE AND TUNNEL TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |