CN205444971U - Ductile device of controllable FRP reinforced structure - Google Patents
Ductile device of controllable FRP reinforced structure Download PDFInfo
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- CN205444971U CN205444971U CN201620124915.8U CN201620124915U CN205444971U CN 205444971 U CN205444971 U CN 205444971U CN 201620124915 U CN201620124915 U CN 201620124915U CN 205444971 U CN205444971 U CN 205444971U
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- frp
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- end anchorage
- deformation section
- anchorage device
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- 239000000463 material Substances 0.000 claims abstract description 37
- 238000004873 anchoring Methods 0.000 claims abstract description 26
- 239000011230 binding agent Substances 0.000 claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 12
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims abstract description 9
- 238000004080 punching Methods 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims description 33
- 239000011150 reinforced concrete Substances 0.000 claims description 14
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000004567 concrete Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 11
- 230000008859 change Effects 0.000 description 8
- 230000006378 damage Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 230000002787 reinforcement Effects 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005728 strengthening Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000002910 structure generation Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
Abstract
The utility model discloses a ductile device of controllable FRP reinforced structure, the FRP reinforced structure includes end anchoring device, FRP sheet, friction piece, rigid cover plate, expansion bolts and binder, the material of end anchoring device is mild steel, the end anchoring device includes the anchor section, warp section and linkage segment, end anchoring device top is provided with friction piece, rigid cover plate, all is provided with two circular ports on friction piece and the rigid cover plate, the circular port with the first end coincidence of slotted hole, the circular port distance the minimum distance of the second end of slotted hole is S, treat to be provided with on reinforcing concrete's the reinforcing area two with what the slotted hole was corresponding punches in advance, expansion bolts passes the circular port with the slotted hole is impressed in punching in advance, the end anchoring device with produce frictional force between the friction piece. Because the utility model discloses the device is provided with the friction section of sliding S, has realized that the FRP reinforced structure is ductile controllable.
Description
Technical field
This utility model relates to FRP field of reinforcement, particularly relates to the device of a kind of controlled FRP ruggedized construction ductility.
Background technology
Fibre reinforced composites (FibreReinforcedPolymer/Plastic is called for short FRP), are widely used among structural strengthening with remarkable advantages such as its lightweight, high-strength, corrosion-resistant, easy making process.Use in the world at present the most extensively, research the most deep be exactly externally bonded FRP reinforcement reinforcement technique, also known as EB-FRP reinforcement technique.The way of EB-FRP reinforcement technique is to be adhered directly onto in structure to be reinforced by FRP sheet material use epoxy resin, load on this spline structure just delivers load to FRP material by this binding agent of epoxy resin, so that FRP is original structure shares its load being difficult to bear, reached the effect reinforced by such method.Thus being not difficult to find out, the adhesion strength between FRP and concrete will play decisive role to the consolidation effect of FRP reinforced concrete structure.But, current substantial amounts of experimentation shows, FRP-concrete binding interface is that comparison is fragile, and the most consistent showing as peels off the stripping damage into typical damage form with FRP from concrete.This destruction also exists significantly shortcoming: (1) FRP utilization rate is low, when only reaching the utilization rate of about 30%, FRP just peels off from concrete interface, it is a kind of waste greatly for this FRP material the highest to intensity, too increases Financial cost simultaneously；(2) ductility is poor, and failure mode belongs to brittle break.Brittle break is a kind of unexpected destruction, the building collapsing time is occurred to extremely short from destruction, it is that engineering is forbidden occur, because when reinforced structure is affected by external influence, as house uses changes of function, earthquake etc., once structure generation brittle break house will collapse suddenly, people's not free escape at all, so the life security of people will be caused threat greatly.Although the problem currently for FRP utilization rate has had method to tackle, but the lifting amplitude of FRP ductility is still uncontrollable, and FRP ductility promotes the controllability of amplitude, has great significance actual production.Accordingly, it is desirable to provide the device of a kind of controlled FRP ruggedized construction ductility.
Utility model content
The purpose of this utility model is to provide the device of the controlled FRP ruggedized construction ductility that a kind of ductility can control.
nullFor achieving the above object，This utility model provides following scheme: this utility model provides the device of a kind of controlled FRP ruggedized construction ductility，Described FRP ruggedized construction includes end anchorage device、FRP sheet material、Friction member、Rigid cover plate、Expansion bolt and binding agent，Described end anchorage device is two，Two described end anchorage devices connect by FRP sheet material described in is fixing，Described end anchorage device and described FRP sheet material are all fixed in the reinforcing area treating reinforced concrete by described binding agent，The material of described end anchorage device is mild steel，Described end anchorage device includes anchoring section、Deformation section and linkage section，Two slotted holes it are provided with on described anchoring section，Described deformation section connects described anchoring section and described linkage section，The variable-width of described deformation section，The ultimate strength of described deformation section is less than the ultimate strength of described FRP sheet material，It is provided with rectangular through slot on described linkage section，Described FRP sheet material is fixing with described rectangular through slot to be connected，Described end anchorage device is provided above described friction member，Described rigid cover plate it is provided with on described friction member，Two circular ports it are provided with on described friction member and described rigid cover plate，Described circular port overlaps with the first end of described slotted hole，Described circular port is S apart from the beeline of the second end of described slotted hole，Two pre-punchings corresponding with described slotted hole it are provided with on the described reinforcing area treating reinforced concrete，Described expansion bolt is pressed in described pre-punching through described circular port and described slotted hole，Frictional force is produced between described end anchorage device and described friction member，Described frictional force is less than the elastic limit tensile bearing capacity of described deformation section.
Optionally, the width of described deformation section is the widest, and the ultimate strength of described deformation section is the biggest.
Optionally, described binding agent is epoxy resin.
Optionally, described deformation section is provided with fillet structure with the junction of described anchoring section and the junction of described deformation section and described linkage section.
Optionally, the size of described frictional force is controlled by the screw-down torque of described expansion bolt.
The specific embodiment provided according to this utility model, the utility model discloses techniques below effect:
First the strengthening mechanism that two the end anchorage devices linked together by a FRP sheet material in the device of a kind of controlled FRP ruggedized construction ductility that this utility model provides form, it is bonded together with binding agent between strengthening mechanism and the reinforcing area treating reinforced concrete, end anchorage device in strengthening mechanism is arranged above friction member, friction member be arranged above rigid cover plate, the FRP ruggedized construction with FRP sheet material being anchored in the reinforcing area treating reinforced concrete by expansion bolt, use the mode that expansion bolt is fixing, avoid on FRP sheet attaching to structure to be reinforced directly, the FRP peeling phenomenon occurred, improve the utilization rate of FRP.
Furthermore, owing to the end anchorage device in FRP ruggedized construction includes anchoring section, deformation section, linkage section, end anchorage device is to be processed by mild steel steel plate, mild steel has extraordinary ductility, when FRP ruggedized construction is when by load, increasing along with load, the deformation section of end anchorage device deforms, add the ductility of ruggedized construction, the control to ruggedized construction ductility can be realized so that structural damage becomes a relatively slow ductile fracture process by changing deformation section length；
Additionally, use the mode that expansion bolt is fixing, make to produce between friction member and end anchorage device frictional force Pf, and can be by expansion bolt being implemented the difference of screw-down torque, control the size of frictional force between friction member and end anchorage device, frictional force is less than the elastic limit tensile bearing capacity of deformation section, when FRP is delivered to the load of this utility model device less than owing to producing frictional force Pf when bolt is tightened between friction member and end anchorage device, end anchorage device is that frictional slip firmly will not occur, the now deformation section generation elastic deformation of end anchorage device；When load increases to produce between friction member and end anchorage device frictional force Pf, and end anchorage device starts to slide, and now to be remained above frictional force Pf constant for load, and sliding constantly increases.The mode of this frictional slip makes FRP ruggedized construction ductility obtain secondary raising, in this stage, only need to change the size of S to change the ductility of FRP ruggedized construction.
Finally, the control to FRP utilization rate can be realized by changing the width of deformation section, change along with deformation section width, the cross section of deformation section is also with change, when the cross section of deformation section increases, the ultimate tension that deformation section can bear increased accordingly (ensure deformation section ultimate tension less than FRP sheet material break pulling force), the increase of deformation section ultimate tension makes FRP ruggedized construction can bear bigger load, increase the utilization rate of FRP sheet material, it is achieved that the controllability to FRP sheet material utilization rate simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment will be briefly described below, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the overall structure schematic diagram of FRP ruggedized construction in this utility model embodiment；
Fig. 2 is the partial structurtes schematic diagram of FRP ruggedized construction in this utility model embodiment；
Fig. 3 is the top view of the partial structurtes of FRP ruggedized construction in this utility model embodiment；
Fig. 4 is the load sliding curve comparison diagram using this utility model device；
Wherein: 1-expansion bolt, 2-end anchorage device, 3-FRP sheet material, 4-binding agent, 5-treat reinforced concrete, 6-anchoring section, 7-deformation section, 8-linkage section, 9-slotted hole, 10-fillet structure, 11-rectangular through slot, 12-friction member, 13-rigid cover plate, 14-circular port, 15-the second end, 16-first end.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
The purpose of this utility model is to provide the device of a kind of controlled FRP ruggedized construction ductility with controlled ductility.
Understandable for enabling above-mentioned purpose of the present utility model, feature and advantage to become apparent from, with detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, the overall structure schematic diagram of FRP ruggedized construction, end anchorage device in FRP ruggedized construction is bonded in by binding agent the force-bearing surfaces treating reinforced concrete, and by two end anchorage device one end by squeezing into expansion bolt and treating that reinforced concrete is reliably connected, the other end of two end anchorage devices is connected with FRP sheet material, with control FRP sheet material from concrete surface peel stress to be reinforced and deformability, above two end anchorage devices, also it is separately installed with friction member.
nullSuch as Fig. 1、2、Shown in 3，This utility model provides a kind of method of controlled FRP ruggedized construction ductility，Described FRP ruggedized construction includes end anchorage device 2、FRP sheet material 3、Friction member 12、Rigid cover plate 13、Expansion bolt 1 and binding agent 4，Described end anchorage device 2 and described FRP sheet material 3 are connected together，Described end anchorage device 2 is to be processed by mild steel steel plate，It is provided with anchoring section 6 on described end anchorage device 2、Deformation section 7 and linkage section 8，Described anchoring section 6 is provided with two slotted holes 9，Described anchoring section 6 is provided with friction member 12，The top of described friction member 12 is placed with rigid cover plate 13，Two circular ports 14 it are provided with on described rigid cover plate 13 and described friction member 12，Described circular port 14 overlaps with the first end 16 of described slotted hole 9，Described circular port 14 is S apart from the beeline of the second end 15 of described slotted hole 9，One expansion bolt 1 is installed on described rigid cover plate 13，It is connected by described deformation section 7 between described anchoring section 6 with described linkage section 8，The variable-width of described deformation section 7，The ultimate strength of described deformation section 7 is less than the ultimate strength of described FRP sheet material 3，Described linkage section 8 has rectangular through slot 11，Described FRP ruggedized construction has the described end anchorage device 2 being arranged in pairs，Rectangular through slot 11 in every a pair end anchorage device 2 arranged in pairs is attached with FRP sheet material 3 described in；Described method includes:
In the reinforcing area treating reinforced concrete 5 arrange two pre-punchings, wherein, said two punch in advance between distance and described slotted hole 9 between distance identical；
Described binding agent 4 is coated in the reinforcing area treating reinforced concrete 5；
Described end anchorage device 2 and described FRP sheet material 3 are bonded on described binding agent 4；
By described expansion bolt 1 through the described circular port 14 on described rigid cover plate 13 and described friction member 12, and the described slotted hole 9 on described end anchorage device 2 is pressed in described pre-punching；
Being tightened by described expansion bolt 1, produce frictional force between described end anchorage device 2 and described friction member 12, described frictional force is less than the elastic limit tensile bearing capacity of described deformation section.
As the optional embodiment of one, the width of described deformation section 7 is the widest, and the ultimate strength of described deformation section 7 is the biggest.
As the optional embodiment of one, described binding agent 4 is epoxy resin.
As the optional embodiment of one, described deformation section 7 all does smooth variable cross-section transition processing with the junction of described anchoring section 6 and the junction of described deformation section 7 and described linkage section 8.
As the optional embodiment of one, the size of described frictional force is controlled by the screw-down torque of described expansion bolt 1.
nullThis utility model provides the device of a kind of controlled FRP ruggedized construction ductility，Described FRP ruggedized construction includes end anchorage device 2、FRP sheet material 3、Friction member 12、Rigid cover plate 13、Expansion bolt 1 and binding agent 4，Described end anchorage device 2 is two，Two described end anchorage devices 2 connect by FRP sheet material described in one 3 is fixing，Described end anchorage device 2 and described FRP sheet material 3 are all fixed in the reinforcing area treating reinforced concrete 5 by described binding agent 4，The material of described end anchorage device 2 is mild steel，Described end anchorage device 2 includes anchoring section 6、Deformation section 7 and linkage section 8，Two slotted holes 9 it are provided with on described anchoring section 6，Described deformation section 7 connects described anchoring section 6 and described linkage section 8，The variable-width of described deformation section 7，The ultimate strength of described deformation section 7 is less than the ultimate strength of described FRP sheet material 3，It is provided with rectangular through slot 11 on described linkage section 8，Described FRP sheet material 3 is fixing with described rectangular through slot 11 to be connected，Described end anchorage device 2 is provided above described friction member 12，Described rigid cover plate 13 it is provided with on described friction member 12，Two circular ports 14 it are provided with on described friction member 12 and described rigid cover plate 13，Described circular port 14 overlaps with the first end 16 of described slotted hole 9，Described circular port 14 is S apart from the beeline of the second end 15 of described slotted hole 9，Two pre-punchings corresponding with described slotted hole 9 it are provided with on the described reinforcing area treating reinforced concrete 5，Described expansion bolt 1 is pressed in described pre-punching through described circular port 14 and described slotted hole 9，Frictional force is produced between described end anchorage device 2 and described friction member 12，Described frictional force is less than the elastic limit tensile bearing capacity of described deformation section 7.
As the optional embodiment of one, the width of described deformation section 7 is the widest, and the ultimate strength of described deformation section 7 is the biggest.
As the optional embodiment of one, described binding agent 4 is epoxy resin.
As the optional embodiment of one, described deformation section 7 is provided with fillet structure 10 with the junction of described anchoring section 6 and the junction of described deformation section 7 and described linkage section 8.
As the optional embodiment of one, the size of described frictional force is controlled by the screw-down torque of described expansion bolt 1.
Use anchor load sliding curve after this utility model device, as shown in Figure 4, frictional force Pf in this utility model device, less than the elastic limit tensile bearing capacity of end anchorage device, is so to ensure that FRP ruggedized construction Ductility Design link i.e. S (frictional slip section) and deformation section 7 while heavily stressed work can play a role.When the load that FRP sheet material is delivered to end anchorage device is less than frictional force Pf owing to being formed between end anchorage device 2 and friction member 12 when bolt is tightened, anchoring section 6 is that frictional slip firmly will not occur, the most whole device generation elastic deformation, is the stretch section of first paragraph in Fig. 4.Reach maximum static friction force when power increases to Pf, deformation section 7 starts to slide, and now tries hard to keep and holds the constant sliding of Pf and constantly increase, shows as horizontal segment in the diagram.The length of this horizontal segment, is i.e. the part improving end anchor 2 ductility secondary, in this stage, only need to change the size of S to change integrally-built ductility.When, after length S that slip length reaches reserved on anchoring section 6, end anchorage device 2 is inflated again the frictional force Pf anchor of bolt 1 and contact surface, hereafter deformation section 7 continuous firing, until destroying.Figure shows as the load-deformation curve of typical mild steel, horizontal segment is later the most in the diagram stretch section, surrender section and strengthening segment and necking section.This stage is to change the ductility of structure by changing length and the model of selected mild steel of deformation section 7.
Owing to the coefficient of friction between steel is less, this utility model device uses the mode increasing friction member, increases the frictional force between steel, and the general quality of friction member is soft, it contacts with steel and could produce bigger coefficient of friction, thus plays the effect of increasing friction force.The material of common friction member has aluminum, pyrite, rubber etc..
Principle of the present utility model and embodiment are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method of the present utility model and core concept thereof；Simultaneously for one of ordinary skill in the art, according to thought of the present utility model, the most all will change.In sum, this specification content should not be construed as restriction of the present utility model.
Claims (5)
- null1. the device of a controlled FRP ruggedized construction ductility，It is characterized in that，Described FRP ruggedized construction includes end anchorage device、FRP sheet material、Friction member、Rigid cover plate、Expansion bolt and binding agent，Described end anchorage device is two，Two described end anchorage devices connect by FRP sheet material described in is fixing，Described end anchorage device and described FRP sheet material are all fixed in the reinforcing area treating reinforced concrete by described binding agent，The material of described end anchorage device is mild steel，Described end anchorage device includes anchoring section、Deformation section and linkage section，Two slotted holes it are provided with on described anchoring section，Described deformation section connects described anchoring section and described linkage section，The variable-width of described deformation section，The ultimate strength of described deformation section is less than the ultimate strength of described FRP sheet material，It is provided with rectangular through slot on described linkage section，Described FRP sheet material is fixing with described rectangular through slot to be connected，Described end anchorage device is provided above described friction member，Described rigid cover plate it is provided with on described friction member，Two circular ports it are provided with on described friction member and described rigid cover plate，Described circular port overlaps with the first end of described slotted hole，Described circular port is S apart from the beeline of the second end of described slotted hole，Two pre-punchings corresponding with described slotted hole it are provided with on the described reinforcing area treating reinforced concrete，Described expansion bolt is pressed in described pre-punching through described circular port and described slotted hole，Frictional force is produced between described end anchorage device and described friction member，Described frictional force is less than the elastic limit tensile bearing capacity of described deformation section.
- The device of a kind of controlled FRP ruggedized construction ductility the most according to claim 1, it is characterised in that the width of described deformation section is the widest, and the ultimate strength of described deformation section is the biggest.
- The device of a kind of controlled FRP ruggedized construction ductility the most according to claim 1, it is characterised in that described binding agent is epoxy resin.
- The device of a kind of controlled FRP ruggedized construction ductility the most according to claim 1, it is characterised in that described deformation section is provided with fillet structure with the junction of described anchoring section and the junction of described deformation section and described linkage section.
- The device of a kind of controlled FRP ruggedized construction ductility the most according to claim 1, it is characterised in that the size of described frictional force is controlled by the screw-down torque of described expansion bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620124915.8U CN205444971U (en) | 2016-02-17 | 2016-02-17 | Ductile device of controllable FRP reinforced structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620124915.8U CN205444971U (en) | 2016-02-17 | 2016-02-17 | Ductile device of controllable FRP reinforced structure |
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| CN205444971U true CN205444971U (en) | 2016-08-10 |
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| CN201620124915.8U Expired - Fee Related CN205444971U (en) | 2016-02-17 | 2016-02-17 | Ductile device of controllable FRP reinforced structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569373A (en) * | 2016-02-17 | 2016-05-11 | 深圳大学 | Method and device for controlling ductility of FRP reinforcing structure |
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2016
- 2016-02-17 CN CN201620124915.8U patent/CN205444971U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569373A (en) * | 2016-02-17 | 2016-05-11 | 深圳大学 | Method and device for controlling ductility of FRP reinforcing structure |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160810 |