CN205577465U - Utilize device of FRP reinforcing concrete shear force wall - Google Patents
Utilize device of FRP reinforcing concrete shear force wall Download PDFInfo
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- CN205577465U CN205577465U CN201620380462.5U CN201620380462U CN205577465U CN 205577465 U CN205577465 U CN 205577465U CN 201620380462 U CN201620380462 U CN 201620380462U CN 205577465 U CN205577465 U CN 205577465U
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Abstract
The utility model relates to a civil engineering structure consolidates technical field, concretely relates to utilize device of FRP reinforcing concrete shear force wall, including concrete shear force wall, epoxy layer, a FRP strip and the 2nd FRP strip, two walls on the concrete shear force wall all scribble the epoxy layer, a FRP strip is transversely completely glued on the surface that lies in the epoxy layer of the lower part of concrete shear force wall, equidistant the 2nd FRP strip of a plurality of of evenly transversely pasting in upper portion of a FRP strip, the lower part of concrete shear force wall evenly are provided with a plurality of through -hole, the device of FRP reinforcing concrete shear force wall still includes steel sheet, screw rod and nut, has offered the mounting hole on the steel sheet, and the both ends of through -hole have all covered the steel sheet and have made the mounting hole relative with the through -hole, and the screw rod passes concrete shear force wall, epoxy layer, a FRP strip and a steel sheet simultaneously, and the nut is installed at the both ends of steel sheet. The utility model discloses the shock resistance of concrete shear force wall not only can be improved, and FRP debonding failure can be prevented.
Description
Technical field
This utility model relates to civil engineering structure reinforcement technique field, is specifically related to a kind of device and method utilizing FRP reinforced concrete shear wall.
Background technology
In field of civil engineering, shear wall, also known as seismic structural wall, earthquake resistant wall, is most important lateral resistant member in high building structure, is mainly used to bear wind load or horizontal loading that geological process causes.When existing shear wall structure is due to reasons such as design, constructional deficiencies, even disaster, causes its Lack of support, when affecting the safety of building structure and normally use, need to carry out repairing and reinforcement.For solving the problem of shear wall Lack of support, in existing reinforcement means, mainly have by FRP cloth laterally equidistantly or be covered with shear wall surface mount, so can improve shear wall shear resistant capacity, ductility and power consumption, thus improve its anti-seismic performance.But, the shear wall after reinforcing is under the axial pressure effect with horizontal force, and shear wall bottom section is relatively big due to internal force, more destructible.According to the first reinforcement means, FRP is the most equidistantly pasted on shear wall surface, and bottom shear wall, does not pastes FRP concrete band, owing to without FRP constraint, easily forming plane of weakness, consolidation effect can be affected；According to another reinforcement means, being reinforced by full for FRP cloth shear wall surface mount, this reinforcement means, for the less top of shear wall internal force, easily causes reinforcing excess, wastes material.
Still further aspect, shear wall is susceptible to FRP stripping damage under load action, and FRP peels off the tensile strength utilization rate not only reducing FRP material, makes component generation brittle break simultaneously, affects structural safety.
For the problem solving FRP stripping damage, patent publication No. is that the Chinese patent of CN 103866991 A discloses a kind of method preventing basalt fiber cloth and concrete from peeling off when repairing shear wall, main solution in the method is through shear wall through hole by basalt fibre bar, its two ends are that petal-shaped is pasted onto basalt fiber cloth surface, by the method that basalt fibre bar one end silver is applied pulling force, there is provided and paste normal pressure between concrete surface and basalt fiber cloth and prevent stripping damage horizontal force, but the bonding normal pressure that the method provides is less, and the method working procedure is loaded down with trivial details, anchoring effect is affected bigger by construction quality.
To sum up, need one can either improve shear wall shock resistance and be prevented from again FRP stripping damage reinforcement means.
Utility model content
The purpose of this utility model is the problem for above-mentioned existence, thering is provided a kind of a kind of device utilizing FRP reinforced concrete shear wall being effectively improved concrete shear force wall shock resistance, the purpose of this utility model also resides in be provided a kind of easy construction and can effectively stop what FRP and concrete peeled off to utilize FRP reinforced concrete shear wall method.
nullThis utility model utilizes the technical scheme of the device of FRP reinforced concrete shear wall to be: the device of a kind of FRP reinforced concrete shear wall，Including concrete shear force wall (1)，Smooth epoxy resin layer，Oneth FRP band (2-1) and the 2nd FRP band (2-2)，(1) two metope of described concrete shear force wall all scribbles epoxy resin layer，A FRP band (2-1) is the most completely glued on the surface of the epoxy resin layer being positioned at the bottom of concrete shear force wall (1)，Several the 2nd FRP bands (2-2) are equidistantly the most laterally pasted on the top of a described FRP band (2-1)，The bottom of concrete shear force wall (1) is evenly arranged with several through holes，The device of described FRP reinforced concrete shear wall also includes steel plate (3)、Screw rod (5) and nut (4)，Described steel plate offers installing hole on (3)，The two ends of described through hole are all covered with steel plate (3) and make installing hole relative with through hole，Described screw rod (5) is also cross concrete shear force wall (1)、Epoxy resin layer、Oneth FRP band (2-1) and steel plate (3)，The two ends of described steel plate (3) are provided with nut (4).
The height of pasting of a described FRP band (2-1) is from scribbling the scope that epoxy resin layer metope bottom at least 0.4 times wall is high.
Described steel plate (3) is square, and its length of side is at least 0.8 times of FRP strip width, and the diameter of installing hole is at least above the major diameter of thread 2mm of screw rod (5).
Described screw rod (5) is the carbon steel of more than 4.8 grades, screw flight external diameter >=10mm, and the length of screw rod is more than or equal to concrete shear force wall (1) thickness of wall body, steel plate (3) thickness and nut (4) thickness sum；
Described FRP is carbon cloth, glass fabric, basalt fiber cloth or aryl fiber cloth.
The beneficial effects of the utility model are:
1, this utility model is taked the most viscous and the most uniformly pastes the reinforcing mode that FRP band combines, in the bigger altitude range of internal force of shear wall bottom, FRP band is the most completely glued along metope, strengthen the constraint to concrete, prevent the development of concrete shear wall crack, be the region that internal force is less on the top of concrete shear force wall, take equidistant laterally homogeneous stickup FRP band, the most not only it is effectively increased concrete shear force wall shock resistance, and saves material, economical rationality.
2, mechanical anchor is used to prevent FRP and concrete stripping damage, screw rod is reserved through hole through shear wall, by the method that screw rod is applied certain pretorque, screw rod, nut and steel plate is utilized to provide the normal pressure between concrete surface and FRP, requiring relatively low to workmen's technology, working procedure is simple, not only increases the utilization rate of FRP, and construction quality is easily guaranteed that, FRP is effectively prevented to peel off with concrete.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment one of the device of this utility model a kind of FRP reinforced concrete shear wall；
Fig. 2 is the Section A-A structural representation of Fig. 1；
Fig. 3 is and the structural representation of this utility model contrast reinforcement means one；
Fig. 4 is and the structural representation of this utility model contrast reinforcement means two.
Detailed description of the invention
The utility model discloses a kind of device utilizing FRP reinforced concrete shear wall, to improve concrete shear force wall shock resistance and effectively to stop FRP and concrete to be peeled off.
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clear, complete description, it is clear that described embodiment is only a part of embodiment of the present utility model rather than whole embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are obtained every other embodiment under not making creative work premise, broadly fall into protection domain of the present utility model.
The embodiment one of the device utilizing FRP reinforced concrete shear wall that this utility model provides, as shown in Figure 1 and 2, including concrete shear force wall 1, smooth epoxy resin layer, laterally FRP band 2,1 two metopes of described concrete shear force wall all scribble epoxy resin layer, and it is from scribbling the scope that epoxy resin layer metope bottom at least 0.4 times wall is high that the height of pasting of a FRP band 2-1, a FRP band 2-1 is the most completely glued on the surface of the epoxy resin layer being positioned at the bottom of concrete shear force wall 1；Several the 2nd FRP band 2-2 are equidistantly the most laterally pasted on the top of a described FRP band 2-1, the bottom of concrete shear force wall 1 is evenly arranged with several through holes, the device of described FRP reinforced concrete shear wall also includes steel plate 3, screw rod 5 and nut 4, installing hole is offered on described steel plate 3, steel plate 3 uses Q235 steel, is shaped as square, and thickness is at least 8mm, its length of side is at least 0.8 times of FRP strip width, and installing hole diameter is at least above screw rod 5 major diameter of thread 2mm；The two ends of described through hole are all covered with steel plate 3 and make installing hole relative with through hole, and described screw rod 5 is also cross concrete shear force wall 1, epoxy resin layer, FRP band 2-1 and a steel plate 3, and the two ends of described steel plate 3 are provided with nut 4, and nut is applied moment of torsion.
Screw rod 5 is the carbon steel of more than 4.8 grades, major diameter of thread >=10mm, and reach is at least shear wall 1 thickness of wall body, steel plate 3 thickness and nut 4 thickness sum；First and second FRP band can be carbon cloth, glass fabric, basalt fiber cloth or aryl fiber cloth；Nut 4 is hex nut, and screw thread specification keeps consistent with described screw rod 5 specification.
In the present embodiment, shear wall 1 a size of b × h × t=700 mm × 1200 mm × 100 mm；FRP band 2 is carbon cloth (CFRP), and strip width is 100mm, and thickness is 0.111mm；Steel plate 3 length of side is 80mm, and thickness is 8mm, and center-hole diameter is 12mm；Nut 4 is the M10 hex nut that National Standard of the People's Republic of China " hex nut C level " (GB/T 41-2000) specifies；The a diameter of 10mm of screw rod 5, a length of 150mm；To in the range of wall height 540mm bottom described shear wall 1, the most completely gluing FRP band 2-1, FRP band 2-1 and pasting the number of plies is one layer, and between band, the lap of splice is 12mm；FRP band 2-2, far from bottom 540mm range above, is the most laterally pasted in described concrete shear force wall 1 wall height direction, and between FRP band 2-2, clear distance is 120mm, and it is two-layer that band pastes the number of plies.
The implementation of the device utilizing FRP reinforced concrete shear wall of the above-mentioned offer of this utility model, as shown in Fig. 1 ~ 4, comprises the following steps:
A () determines position and the anchorage point pasting first and second FRP band, and indicate FRP band sticking area and anchoring through hole center in the line of shear wall 1 metope.
B () utilizes boring machine determining that anchoring through hole center position drills through a diameter of 12mm through hole, utilize high pressure air rifle and high pressure water spray gun to be cleaned out by the dust in through hole.
C if the uneven situations such as honeycomb, pitted skin, depression occurs in () shear wall 1 surface, the repair materials using the cementitiousness such as epoxy resin mortar strong is repaired.Utilize polisher that shear wall corner angle are polished into fillet, and 1 two metopes of shear wall (b × h=700 mm × 1200 mm) stickup FRP strip face is polished flat, the concrete loose with steel brush desurfacing and impurity, until being completely exposed new aggregate, with acetone, concrete surface is cleaned up.
D () configures epoxy gluing agent according to mass ratio 4:1, need to paste FRP pillar location brush ring epoxy resins cementing agent in shear wall 1 both side surface, it is ensured that brush ring epoxy resins cementing agent thickness is uniform, and repeated multiple times levelling.Brush coating ensures epoxy gluing agent surface cleaning after completing.
(e) step (d) epoxy gluing agent with refer to viscous present wire drawing state time, the first and second FRP band 2 having utilized carbon fiber adhesive glue to impregnate is pasted onto shear wall metope, and note being pushed aside by the cellosilk of a FRP band 2-1 near the through hole of concrete shear force wall, reserve installation screw rod space, cylinder is utilized repeatedly to roll along machine direction, extrusion bubble, it is ensured that FRP band is intact with concrete binding.
F screw rod 5 after the hardening of carbon fiber adhesive glue, is inserted in boring, utilizes syringe to be injected in through hole by epoxy anchoring adhesive in step (e) by ().Note taking safeguard procedures when inserting screw rod 5, to ensure effective fastening of screw rod and bolt.
G steel plate 3, after step (f) epoxy anchoring adhesive solidifies, through screw rod 5 and is utilized epoxy anchoring adhesive by steel sticking in FRP strip face by ().
H (), after step (g) epoxy anchoring adhesive solidifies, utilizes spanner to be fastened with screw rod 5 by nut 4, and utilizes Digital Electronic Torque Wrench that nut 4 applies 30.0 Nm moments of torsion.
The method of a kind of FRP reinforced concrete shear wall described in the utility model is as follows with following two reinforcement means comparative analysis:
Method one: as it is shown on figure 3, the method and the identical reinforcement material of reinforcement means employing described in the utility model, identical material usage；The most do not use anchor, different bonding method, figure is identically numbered with embodiment and represents identical meaning, except for the difference that: the most laterally paste CFRP band 2-2 along concrete shear force wall 1 wall short transverse, CFRP strip width is 100mm, between band, clear distance is 120mm, pastes two-layer.
Method two: as shown in Figure 4, the method reinforcement material identical with reinforcement means described in the utility model, identical material usage, identical bonding method；The most do not use anchor.Referring specifically to Fig. 4, being identically numbered with embodiment and represent identical meaning in figure, difference is in figure not use screw rod, nut and steel plate.
First to former shear wall, being reinforced by shear wall after fire and method one, method two and reinforcement means described in the utility model and carried out Low-cycle Test by five kinds of situations of shear wall after fire, concrete test result is shown in Table 1:
Table 1 concrete shear force wall shock test test result
Note: all hysteretic loop sums of load-displacement curve circulation before the peak load that in table 1, power consumption drops to 85% for the ultimate load of component.
As can be seen from Table 1: this utility model reinforcement means can be effectively improved by shear wall shock resistance after fire.10.3% and 21.7% is have dropped respectively by the more former shear wall bearing capacity of shear wall after fire and power consumption；And shear wall can meet and exceed former shear wall bearing capacity and power consumption after CFRP reinforces: Application way one is reinforced and has relatively been respectively increased 11.5% and 138.7% by unguyed after fire by shear wall bearing capacity after fire and power consumption；Application way two is reinforced and has relatively been respectively increased 20.6% and 261.4% by unguyed after fire by shear wall bearing capacity after fire and power consumption；And utilize this utility model to reinforce and be relatively respectively increased 26.8% and 469.2% by unguyed after fire by shear wall bearing capacity after fire and power consumption.
In sum, technical method of the present utility model and device can be effectively improved the shock resistance of concrete shear force wall, can be that the appropriate design of shear-wall strengthening scheme provides reference, and engineering practicability is stronger.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this utility model.Multiple amendment to these embodiments, will be apparent to one skilled in the art, and generic principles defined herein can realize in the case of without departing from spirit or scope of the present utility model in other embodiments.Therefore, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (6)
- null1. the device of a FRP reinforced concrete shear wall，Including concrete shear force wall (1)、Smooth epoxy resin layer，Oneth FRP band (2-1) and the 2nd FRP band (2-2)，It is characterized in that: (1) two metope of described concrete shear force wall all scribbles epoxy resin layer，A FRP band (2-1) is the most completely glued on the surface of the epoxy resin layer being positioned at the bottom of concrete shear force wall (1)，Several the 2nd FRP bands (2-2) are equidistantly the most laterally pasted on the top of a described FRP band (2-1)，The bottom of concrete shear force wall (1) is evenly arranged with several through holes，The device of described FRP reinforced concrete shear wall also includes steel plate (3)、Screw rod (5) and nut (4)，Described steel plate offers installing hole on (3)，The two ends of described through hole are all covered with steel plate (3) and make installing hole relative with through hole，Described screw rod (5) is also cross concrete shear force wall (1)、Epoxy resin layer、Oneth FRP band (2-1) and steel plate (3)，The two ends of described steel plate (3) are provided with nut (4).
- The device of a kind of FRP reinforced concrete shear wall the most according to claim 1, it is characterised in that: the height of pasting of a described FRP band (2-1) is from scribbling the scope that epoxy resin layer metope bottom at least 0.4 times wall is high.
- The device of a kind of FRP reinforced concrete shear wall the most according to claim 1, it is characterized in that: described steel plate (3) is square, its length of side is at least 0.8 times of FRP strip width, and the diameter of installing hole is at least above the major diameter of thread 2mm of screw rod (5).
- The device of a kind of FRP reinforced concrete shear wall the most according to claim 1, it is characterised in that: described steel plate (3) uses Q235 steel, thickness >=8mm.
- The device of a kind of FRP reinforced concrete shear wall the most according to claim 1, it is characterized in that: described screw rod (5) is the carbon steel of more than 4.8 grades, screw flight external diameter >=10mm, the length of screw rod is more than or equal to concrete shear force wall (1) thickness of wall body, steel plate (3) thickness and nut (4) thickness sum.
- The device of a kind of FRP reinforced concrete shear wall the most according to claim 1, it is characterised in that: described FRP is carbon cloth, glass fabric, basalt fiber cloth or aryl fiber cloth.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620380462.5U CN205577465U (en) | 2016-04-29 | 2016-04-29 | Utilize device of FRP reinforcing concrete shear force wall |
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| CN201620380462.5U CN205577465U (en) | 2016-04-29 | 2016-04-29 | Utilize device of FRP reinforcing concrete shear force wall |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781143A (en) * | 2016-04-29 | 2016-07-20 | 华北水利水电大学 | Device and method for reinforcing concrete shear wall by FRP (fiber reinforced plastics) |
| CN107060363A (en) * | 2017-04-19 | 2017-08-18 | 辽宁工业大学 | The FRP cloth end anchorage device of shear strengthening of concrete beam |
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2016
- 2016-04-29 CN CN201620380462.5U patent/CN205577465U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781143A (en) * | 2016-04-29 | 2016-07-20 | 华北水利水电大学 | Device and method for reinforcing concrete shear wall by FRP (fiber reinforced plastics) |
| CN107060363A (en) * | 2017-04-19 | 2017-08-18 | 辽宁工业大学 | The FRP cloth end anchorage device of shear strengthening of concrete beam |
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