CN215052033U - Buckling restraint device for longitudinal bars in plastic hinge area of reinforced concrete pier - Google Patents
Buckling restraint device for longitudinal bars in plastic hinge area of reinforced concrete pier Download PDFInfo
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- CN215052033U CN215052033U CN202121232081.XU CN202121232081U CN215052033U CN 215052033 U CN215052033 U CN 215052033U CN 202121232081 U CN202121232081 U CN 202121232081U CN 215052033 U CN215052033 U CN 215052033U
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Abstract
The utility model relates to a bridge shockproof technical field especially relates to a reinforced concrete pier plasticity hinge district is indulged muscle bucking restraint device, include: the device comprises a metal pipe, longitudinal steel bars, a constraint sleeve, a sealing plug and an elastic energy dissipation assembly. Wherein: the metal tube is vertically fixed on a pier, the longitudinal steel bar is positioned in the metal tube, the lower end of the longitudinal steel bar is embedded in the pier, and the upper end of the longitudinal steel bar extends upwards after penetrating out of an upper port of the metal tube. The restraint sleeve is sleeved on the outer surface of the longitudinal steel bar, a gap is formed between the restraint sleeve and the longitudinal steel bar, and the sealing plugs are filled in the gaps at the two ends of the restraint sleeve. The two ends of the elastic energy dissipation assembly are respectively connected with the inner wall of the metal pipe and the outer wall of the constraint sleeve, and concrete is poured in the space between the metal pipe and the constraint sleeve. The buckling restraining device solves the problems that concrete in a plastic hinge area of a traditional reinforced concrete pier is crushed due to crushing and longitudinal steel bars in the plastic hinge area are easy to be subjected to local buckling failure and damage when being pressed.
Description
Technical Field
The utility model relates to a bridge shockproof technical field especially relates to a reinforced concrete pier plasticity hinge district is indulged muscle bucking restraint device.
Background
The information disclosed in the background of the invention is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information constitutes prior art that is already known to a person of ordinary skill in the art.
With the rapid development of economy in China and the rapid development of urban and highway high-speed railway traffic, the performance requirements of a bridge structure as a lifeline of traffic engineering are increasingly strict. China is at the junction of the European and Asian seismic zones and the Pacific seismic zone, and seismic disasters sometimes occur. At present, the ductile earthquake-proof design is widely adopted in China to design a reinforced concrete structure, namely, under the action of strong earthquake, a local plastic hinge area of a reinforced concrete structure member is allowed to be damaged and damaged, and meanwhile, the plastic hinge area is ensured to have enough ductility.
The bridge pier is used as a main stress component and a key component for supporting an upper structure of the bridge under the action of earthquake, and the earthquake resistance of the bridge pier determines the safety of the bridge to a great extent. The plastic hinge area of the concrete pier after the earthquake based on the conventional ductile earthquake-proof design has large plastic damage and permanent plastic displacement after the earthquake. And compared with the steel pipe with local design, the steel pipe with the whole pier design is not economical and the ductile deformation capability does not exceed the latter. In addition, the conventional method for improving the reinforcement allocation rate of the stirrups in the plastic hinge area of the pier cannot effectively solve the buckling phenomenon of the longitudinal reinforcements in the plastic hinge area.
SUMMERY OF THE UTILITY MODEL
The problem of take place local bucking inefficacy destruction easily when broken and the vertical reinforcing bar pressurized in plastics hinge district to the broken concrete crushing in plastics hinge district of traditional reinforced concrete pier, the utility model provides a reinforced concrete pier plastics hinge district is indulged muscle bucking restraint device, this restraint device can effectively improve the ductility performance of reinforced concrete pier under the reciprocal load effect, has promoted the anti-seismic performance of reinforced concrete pier. In order to achieve the above object, the technical solution of the present invention is as follows.
The utility model provides a reinforced concrete pier plasticity hinge district indulges muscle bucking restraint device, includes: the device comprises a metal pipe, longitudinal steel bars, a constraint sleeve, a sealing plug and an elastic energy dissipation assembly. Wherein: the metal tube is vertically fixed on a pier, the longitudinal steel bar is positioned in the metal tube, the lower end of the longitudinal steel bar is embedded in the pier, and the upper end of the longitudinal steel bar extends upwards after penetrating out of an upper port of the metal tube. The constraint sleeve is sleeved on the outer surface of the longitudinal steel bar, a gap is formed between the constraint sleeve and the longitudinal steel bar, and the sealing plugs are filled in the gaps at the two ends of the constraint sleeve, so that mortar is prevented from entering the gap to block the gap when concrete is poured. The two ends of the elastic energy dissipation assembly are respectively connected with the inner wall of the metal pipe and the outer wall of the constraint sleeve, and concrete is poured in the space between the metal pipe and the constraint sleeve.
Furthermore, a flexible buffer layer is connected to the outer surface of the side wall of the restraining sleeve. Optionally, the flexible buffer layer includes any one of foamed plastic, flexible plastic, rubber, silicone, and the like. The flexible buffer layer helps to allow the constraint sleeve to deform to a certain extent, and a shock insulation effect is achieved.
Furthermore, sealant layers are coated between the longitudinal steel bars and the sealing plug and between the constraint sleeve and the sealing plug, so that water or mortar is further prevented from flowing into the constraint sleeve in the concrete pouring process.
Furthermore, the restraining sleeve is a shape memory alloy sleeve with the inner diameter larger than the outer diameter of the longitudinal steel bar, the restraining sleeve can prevent the longitudinal steel bar in the plastic hinge area from being subjected to local buckling failure damage when being pressed, and the bearing capacity after yielding of the longitudinal steel bar in the reinforced concrete pier and the ductility performance of the member are improved.
Furthermore, the metal pipes comprise alloy pipes such as low-carbon steel soft steel pipes and the like which are low in yield strength, large in energy consumption and good in strength and rigidity, and the arrangement of the metal pipes can effectively improve the ductility of reinforced concrete under reciprocating load and overcome the seismic defect of insufficient ductility of a traditional reinforced concrete pier due to local crushing and breaking.
Further, the sealing plug is any one of a rubber plug, a flexible plastic plug and the like. The mortar can be prevented from entering gaps to block the gaps when concrete is poured, and the mortar has good corrosion resistance.
Further, the elastic energy dissipation component is a metal spring, such as a stainless steel spring, 60Si2Mn steel spring, 60Si2CrA steel spring, 60Si2CrVA steel spring, and the like. The elastic energy dissipation assembly is arranged to help dissipate energy input into the bridge pier by earthquake, and the earthquake resistance of the bridge pier is improved.
Furthermore, two ends of the elastic energy dissipation assembly are respectively welded on the inner wall of the metal pipe and the outer wall of the restraint sleeve, so that the metal pipe and the restraint sleeve are connected into a whole.
Compared with the prior art, the utility model discloses following beneficial effect has:
firstly, restraint device has set up the tubular metal resonator, and it can effectively improve reinforced concrete ductility under reciprocating load, overcomes the not enough antidetonation defect of ductility that traditional reinforced concrete pier leads to because local conquassation is broken.
Secondly, restraint device has set up the restraint sleeve in the outside of longitudinal reinforcement, and set up the clearance between restraint sleeve and longitudinal reinforcement, wherein, the restraint sleeve forms restraint and support to longitudinal reinforcement, do not take place local buckling failure when can effectively preventing the longitudinal reinforcement pressurized in plasticity hinge district and destroy, bearing capacity and the ductility performance of component after the yield of longitudinal reinforcement in the reinforced concrete pier, in addition, through the restraint sleeve that adopts shape memory alloy to make, even the restraint sleeve has produced the deformation, also can be along with uninstallation reconversion. And the gap can allow the longitudinal steel bar to freely deform to a certain degree in the constraint sleeve after the longitudinal steel bar is subjected to longitudinal pressure, so that the longitudinal steel bar can automatically dissipate a part of seismic energy.
Thirdly, restraint device has set up elasticity power consumption subassembly between restraint sleeve and vertical reinforcing bar to connect into a whole with tubular metal resonator and restraint sleeve, make the two atress warp jointly. Meanwhile, the elastic energy dissipation assembly can dissipate energy input into the bridge pier by earthquake, and the earthquake resistance of the bridge pier is improved.
To sum up, adopt restraint device's reinforced concrete pier is under the horizontal reciprocating action of accidental load such as earthquake, and the longitudinal reinforcement in plasticity hinge district can keep the power transmission performance of itself and does not take place the side direction bucking again and destroy, and the difficult conquassation of concrete in plasticity hinge district is broken simultaneously, has effectively improved the ductility performance and the anti-seismic performance of pier.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is the utility model discloses among the embodiment the plastic hinge district longitudinal bar bucking restraint device's of reinforced concrete pier structure sketch map.
Figure 2 is a cross-sectional view a-a of the flexion restraint device of figure 1.
Figure 3 is a cross-sectional view b-b of the buckling restraint apparatus of figure 1.
The scores in the above figures represent:
| 1-a metal tube, | 2-longitudinal reinforcing steel bar, | 3-a restraining sleeve, | 4-a sealing plug, |
| 5-elastic energy consumptionA component, | 6-bridge pier, | 7-clearance, | 8-concrete, |
| 9-a flexible buffer layer, | 10-sealant layer. |
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. Furthermore, it will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
For convenience of description, the words "upper", "lower", "left" and "right" in the present application, if any, merely indicate that the device or element referred to in the present application is constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention, since they are merely intended to be oriented in the upper, lower, left and right directions of the drawings themselves, and not to limit the structure, but merely to facilitate the description of the invention and to simplify the description.
Term interpretation section: the terms "mounted," "connected," "fixed," and the like in the present invention are to be understood in a broad sense, for example, they may be fixedly connected, detachably connected, or integrated; the two components can be connected mechanically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations.
As described above, the plastic hinge region of the concrete pier designed based on the ductility earthquake-proof design has large plastic damage and permanent plastic displacement after earthquake. And compared with the steel pipe with local design, the steel pipe with the whole pier design is not economical and the ductile deformation capability does not exceed the latter. In addition, the conventional method for improving the reinforcement allocation rate of the stirrups in the plastic hinge area of the pier cannot effectively solve the buckling phenomenon of the longitudinal reinforcements in the plastic hinge area.
Therefore, the utility model provides a reinforced concrete pier plasticity hinge district indulges muscle bucking restraint device, refer to fig. 1 to fig. 3, indulge muscle bucking restraint device to the reinforced concrete pier plasticity hinge district that this figure shows, it is the assembly that contains a plurality of parts formation including tubular metal resonator 1, longitudinal reinforcement 2, restraint sleeve 3, sealing plug 4 and elasticity power consumption subassembly 5 etc. wherein:
the metal pipe 1 can effectively improve the ductility of reinforced concrete under reciprocating load, and overcomes the seismic defect of insufficient ductility of the traditional reinforced concrete pier caused by local crushing. The restraining sleeve 3 can prevent the longitudinal steel bar 2 in the plastic hinge area from being damaged by local buckling failure when being pressed, and the bearing capacity after yielding of the longitudinal steel bar in the reinforced concrete pier and the ductility of the component are improved; the sealing plug 4 and the elastic energy dissipation assembly 5 dissipate energy input into the bridge pier by an earthquake, and finally improve the earthquake resistance of the reinforced concrete bridge pier.
It should be understood that the above components constitute the basic structure of the plastic hinge region longitudinal bar buckling constraint device of the reinforced concrete pier, but other components and structures are still required to be matched. Further, the use of the concepts should not be construed merely as a shorthand understanding of their utility in a particular application. Based on the above problems to be solved and the objects to be achieved, a detailed description will now be given by the following specific embodiments.
In the present embodiment, a steel pipe having good strength and rigidity is used as the metal pipe 1. Specifically, the metal pipe 1 is vertically arranged, the lower end of the metal pipe is fixed in a concrete pier, and in addition, the metal pipe 1 is a local steel pipe and is not a whole steel pipe, namely, the steel pipe only covers the lower part of the pier and is not covered on the whole pier. For the metal pipe 1, a mild steel pipe made of mild steel is taken as an example, and due to the characteristics of low yield strength and large energy consumption of mild steel, the ductility of reinforced concrete under horizontal reciprocating load can be improved, and the seismic defect of insufficient ductility of the traditional reinforced concrete pier caused by local crushing and breaking is overcome.
Further, the longitudinal steel bar 2 is located in the metal pipe 1, the lower end of the longitudinal steel bar 2 is embedded in the pier 6, and the upper end of the longitudinal steel bar extends upwards after penetrating through the upper port of the metal pipe 1. As shown in fig. 2 or 3, a plurality of longitudinal steel bars 2 are distributed in the metal pipe 1, and each of the longitudinal steel bars 2 has the following structure.
The outside cover of longitudinal reinforcement 2 has been put and has been had restraint sleeve 3, and for restraint sleeve 3, it is the alloy pipe that the internal diameter is greater than the external diameter of longitudinal reinforcement 2, restraint sleeve 3 cover has clearance 7 on the surface of longitudinal reinforcement 2 and between the two, and clearance 7 can allow longitudinal reinforcement 2 to carry out certain free deformation in restraint sleeve 3 after receiving the longitudinal pressure to the longitudinal reinforcement can independently dissipate some seismic energy. . Meanwhile, the constraint sleeve 3 forms constraint and support for the longitudinal steel bar 2, so that the longitudinal steel bar in the plastic hinge area can be effectively prevented from being damaged by local buckling failure when being pressed, and the bearing capacity after yielding of the longitudinal steel bar in the reinforced concrete pier and the ductility of the member are improved.
In addition, in order to further improve the function of the restraining sleeve 3 in improving the post-yielding load-bearing capacity of the longitudinal bars and the ductility properties of the member, in other embodiments the restraining sleeve 3 is made of a shape memory alloy (e.g., a shape memory alloy from the series ti-ni-cu, ti-ni-fe, ti-ni-cr, etc.), which will recover with unloading even if it is deformed.
Further, in order to prevent mortar from entering the gap to block the gap 7 when concrete is poured, the sealing plugs 4 made of rubber are filled in the gaps 7 at the two ends of the restraining sleeve 3, the sealing plugs are of an annular structure, and the longitudinal steel bar 2 continues to extend upwards after passing through the center of the sealing plug 4. In addition, the sealing plug 4 made of flexible plastic plug or the like can also be used, which can also play a role in sealing the gap 7 at the upper and lower ports of the restraining sleeve 3. In addition, the sealing plug 4 can also play a role in fixing the longitudinal reinforcement.
The elastic energy dissipation assembly 5 is a stainless steel spring, two ends of the elastic energy dissipation assembly 5 are welded to the inner wall of the metal pipe 1 and the outer wall of the restraint sleeve 3 respectively, referring to fig. 2 or fig. 3, the elastic energy dissipation assembly 5 in an exemplary embodiment is horizontally arranged, and three springs are arranged on each longitudinal steel bar 2 in a longitudinal arrangement manner. The metal tube 1 and the restraining sleeve 3 are connected into a whole through the spring, so that the metal tube and the restraining sleeve are stressed and deformed together. Meanwhile, the elastic energy dissipation assembly can dissipate energy input into the bridge pier under the horizontal reciprocating action of accidental loads such as earthquakes and the like, and the anti-seismic performance of the bridge pier is improved. It should be understood that, instead of using said spring of stainless steel, it is also possible to use a spring made of a conventional spring steel as said elastic dissipative element, such as 60Si2Mn、60Si2CrA、60Si2CrVA, and the like.
And after the components are installed, pouring concrete 8 in the space between the metal pipe 1 and the constraint sleeve 3 to form the plastic hinge area concrete. It can be seen that, in the process of construction of the reinforced concrete pier, after the buckling restraining device is adopted, under the horizontal reciprocating action of accidental loads such as earthquakes and the like, the longitudinal steel bars in the plastic hinge area can keep the force transmission performance of the longitudinal steel bars and cannot generate lateral buckling damage, meanwhile, the concrete in the plastic hinge area is not easy to crush and break, the ductility and the anti-seismic performance of the pier are effectively improved, and the problems that the concrete in the plastic hinge area of the traditional reinforced concrete pier is easy to crush and break due to local buckling failure when the longitudinal steel bars in the plastic hinge area are pressed under the strong earthquake condition are solved.
It will be appreciated that the height of the constraining sleeve 3, the height of the metal tube 1 and the number of elastic dissipative assemblies 5 depend on the specific actual plastic hinge length. The wall thickness of the restraint sleeve 3 is determined according to the diameter of the actually configured longitudinal steel bar 2; the specific number, distribution pattern, etc. of the longitudinal rebars 2 in the metal pipe 1.
Further, with continued reference to fig. 1 to 3, in other embodiments, a flexible buffer layer 9 is connected to an outer surface of a side wall of the constraining sleeve 3, and the flexible buffer layer 9 may be any one of foamed plastic, flexible plastic, rubber, silicone, and the like. Set up one deck flexible buffer layer 9 on restraint sleeve 3's outer wall, flexible buffer layer 9 has certain deformation space, helps allowing restraint sleeve 3 to take place certain deformation, plays the shock insulation effect.
Further, with continued reference to fig. 1 to 3, in other embodiments, sealant layers 10 are coated between the longitudinal steel bar 2 and the sealing plug 4, and between the constraining sleeve 3 and the sealing plug 4, so as to further prevent water or mortar from flowing into the constraining sleeve 3 to block the gap 7 during the concrete pouring process, so that the longitudinal steel bar 2 cannot freely deform to some extent in the constraining sleeve 3 after being subjected to longitudinal pressure.
Finally, it should be understood that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (10)
1. The utility model provides a reinforced concrete pier plasticity hinge district indulges muscle bucking restraint device, includes:
the metal pipe is vertically fixed on the bridge pier;
the longitudinal steel bar is positioned in the metal pipe, the lower end of the longitudinal steel bar is embedded in the pier, and the upper end of the longitudinal steel bar extends upwards after penetrating through the upper port of the metal pipe;
the restraining sleeve is sleeved on the outer surface of the longitudinal steel bar, and a gap is formed between the restraining sleeve and the longitudinal steel bar;
the gaps at the two ends of the constraint sleeve are filled with the sealing plugs; and
the elastic energy dissipation assembly is characterized in that two ends of the elastic energy dissipation assembly are respectively connected with the inner wall of the metal pipe and the outer wall of the constraint sleeve, and concrete is poured in a space between the metal pipe and the constraint sleeve.
2. The reinforced concrete pier plastic hinge area longitudinal bar buckling restraining device as claimed in claim 1, further comprising a flexible buffer layer disposed on an outer surface of the side wall of the restraining sleeve.
3. The reinforced concrete pier plastic hinge area longitudinal bar buckling constraint device according to claim 2, wherein the flexible buffer layer comprises any one of foamed plastics, flexible plastics, rubber and silica gel.
4. The buckling constraint device for the longitudinal bars of the plastic hinge area of the reinforced concrete pier as claimed in claim 1, further comprising a sealant layer, wherein the sealant layer is coated between the longitudinal bars and the sealing plug and between the constraint sleeve and the sealing plug.
5. The buckling constraint device for the longitudinal bars in the plastic hinge area of the reinforced concrete pier as claimed in claim 1, wherein the constraint sleeve is a shape memory alloy sleeve with an inner diameter larger than the outer diameter of the longitudinal bars.
6. The plastic hinge area longitudinal bar buckling constraint device for the reinforced concrete pier according to any one of claims 1 to 5, wherein the metal pipe is a mild steel pipe.
7. The reinforced concrete pier plastic hinge area longitudinal bar buckling constraint device according to any one of claims 1 to 5, wherein the sealing plug is any one of a rubber plug and a flexible plastic plug.
8. The plastic hinge area longitudinal bar buckling constraint device for the reinforced concrete pier according to any one of claims 1 to 5, wherein the elastic energy dissipation component is a metal spring.
9. The reinforced concrete pier plastic hinge area longitudinal bar buckling constraint device according to claim 8, wherein the metal spring comprises a stainless steel spring and 60Si2Mn steel spring, 60Si2CrA steel spring, 60Si2At least one of CrVA steel springs.
10. The reinforced concrete pier plastic hinge area longitudinal bar buckling constraint device according to any one of claims 1 to 5, wherein two ends of the elastic energy dissipation assembly are respectively welded on the inner wall of the metal pipe and the outer wall of the constraint sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121232081.XU CN215052033U (en) | 2021-06-03 | 2021-06-03 | Buckling restraint device for longitudinal bars in plastic hinge area of reinforced concrete pier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121232081.XU CN215052033U (en) | 2021-06-03 | 2021-06-03 | Buckling restraint device for longitudinal bars in plastic hinge area of reinforced concrete pier |
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| Publication Number | Publication Date |
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| CN215052033U true CN215052033U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121232081.XU Active CN215052033U (en) | 2021-06-03 | 2021-06-03 | Buckling restraint device for longitudinal bars in plastic hinge area of reinforced concrete pier |
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| CN (1) | CN215052033U (en) |
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- 2021-06-03 CN CN202121232081.XU patent/CN215052033U/en active Active
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