CN210712520U - Assembled buckling-restrained brace device for improving anti-seismic performance of bridge - Google Patents

Assembled buckling-restrained brace device for improving anti-seismic performance of bridge Download PDF

Info

Publication number
CN210712520U
CN210712520U CN201921102419.2U CN201921102419U CN210712520U CN 210712520 U CN210712520 U CN 210712520U CN 201921102419 U CN201921102419 U CN 201921102419U CN 210712520 U CN210712520 U CN 210712520U
Authority
CN
China
Prior art keywords
cross
unit
shaped
inner core
bridge
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
Application number
CN201921102419.2U
Other languages
Chinese (zh)
Inventor
程浩
王永刚
黄凤华
段海娟
滕念管
李彬瑜
黄全成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Jiaotong University
CRRC Tangshan Co Ltd
Original Assignee
Shanghai Jiaotong University
CRRC Tangshan Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Jiaotong University, CRRC Tangshan Co Ltd filed Critical Shanghai Jiaotong University
Priority to CN201921102419.2U priority Critical patent/CN210712520U/en
Application granted granted Critical
Publication of CN210712520U publication Critical patent/CN210712520U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The utility model relates to an assembled buckling restrained brace device for improving bridge anti-seismic performance, include: the energy consumption unit, external restraint unit, end connection unit. The energy consumption unit is made of cross mild steel; the outer constraint unit comprises a U-shaped steel groove, transverse partition plates, lateral constraint plates and cover plates, the lateral constraint plates are welded in the steel groove, the transverse partition plates are longitudinally arranged in the U-shaped steel groove, the two cover plates cover the upper part of the U-shaped steel groove to form outer constraint parts, the two outer constraint parts are bolted at an angle of 180 degrees to each other to form the outer constraint unit, and the outer constraint unit clamps the cross-shaped soft steel inner core; the end connecting unit comprises ear plates, connecting plates, a pin shaft, an upper structure anchorage plate and a lower structure anchorage plate and is used for connecting the supporting device with a pier and a bridge respectively. The utility model discloses be convenient for the power consumption inner core is changed, and outer restraint unit lateral rigidity is big, is showing the power consumption ability that improves the inner core. The device can improve the seismic performance of the bridge structure.

Description

Assembled buckling-restrained brace device for improving anti-seismic performance of bridge
Technical Field
The utility model relates to an energy dissipation brace of bridge structures specifically relates to an assembled buckling restrained brace device for improving bridge anti-seismic performance.
Background
The buckling-restrained brace has a full hysteresis curve and a good energy consumption effect, effectively absorbs external vibration energy through tension-compression deformation, and is widely applied to the field of civil engineering to improve the anti-seismic performance of buildings and structures. In recent years, buckling restrained braces are gradually applied to the field of bridge engineering as damping and energy dissipation devices.
At present, traditional buckling restrained brace packs the concrete between inner core and sleeve pipe, and the inner core surface covers on the unbonded layer, and the concrete prevents inner core pressurized lateral buckling unstability as restraint unit, but traditional strutting arrangement mainly has following problem: the workload of concrete wet operation is large; concrete as a constraint unit is easy to crush and cannot achieve the constraint purpose, so that the elastic deformation of the energy-consuming inner core is small when the energy-consuming inner core is pressed, buckling instability is easy to occur, and the energy-consuming function of the support is seriously degraded; the inner core is not easy to disassemble, the replacement frequency is high and the maintenance cost is high; the non-constrained overhanging section of the inner core is easy to damage the end part and cannot fully consume energy.
SUMMERY OF THE UTILITY MODEL
In order to overcome the difficult problems such as the existing buckling restrained brace that the inner core is inconvenient to change, the restraint ability of restraint unit is poor, anti-seismic performance is not enough, the wet operation work load of concrete is big, the utility model provides a better all-steel assembled buckling restrained brace of power consumption performance has avoided the wet operation of concrete, very big change dismantlement that has made things convenient for the power consumption inner core, and outer restraint unit lateral rigidity is great, prevents the lateral buckling unstability of inner core, the power consumption ability of full play steel. The supporting device is convenient to install, small in installation space, excellent in energy consumption performance and good in durability, and is suitable for improving the seismic performance of the bridge engineering structure.
In order to realize the above functions, the utility model provides a technical scheme does:
the fabricated buckling-restrained brace device for improving the seismic performance of the bridge comprises an energy consumption unit, an outer constraint unit and an end connection unit; the outer constraint unit is provided with an inner wall with a cross-shaped cross section, the energy consumption unit is a cross-shaped soft steel inner core made of Q235 steel and clamped in the cross-shaped inner wall of the assembled outer constraint unit, and bolt holes are formed in two ends of the cross-shaped soft steel inner core and connected with the end part connecting unit through bolts.
The external restraint unit comprises a U-shaped steel groove, a diaphragm plate, a lateral restraint plate, a cover plate, a cushion block and a high-strength bolt. The lateral restraint plate is welded in the steel groove, the transverse partition plate is longitudinally arranged in the U-shaped steel groove to increase the lateral rigidity of the restraint plate, the two cover plates cover the upper part of the U-shaped steel groove to form a closed external restraint part, the two external restraint parts are mutually turned into 180 degrees and are bolted to form an external restraint unit, the assembled assembly of the external restraint unit is realized, and the cross-shaped soft steel inner core is convenient to replace and disassemble.
The end connecting unit comprises a cross connecting piece, a connecting plate, lug plates, a pin shaft, an upper structure anchorage plate and a lower structure anchorage plate, the cross connecting piece is welded on one side of the connecting plate, the lug plates are welded on one side of the connecting plate, the two lug plates are respectively welded on the upper structure anchorage plate and the lower structure anchorage plate, and the gap between the two lug plates is slightly larger than the thickness of the lug plates on the connecting plate.
Further, the height-thickness ratio of the U-shaped steel groove should meet the requirement of local stability, the slenderness ratio should meet the requirement of overall stability, and specifically, the relevant regulations of the design Specification of Steel Structure (GB 50017-2017) should be met.
Preferably, a cushion block is arranged between the two outer constraint parts, the thickness of the cushion block is slightly larger than that of the cross-shaped mild steel inner core limb, and a gap is reserved between the cross-shaped mild steel inner core and the inner wall of the outer constraint unit.
Furthermore, a gap between the cross-shaped mild steel inner core and the inner wall of the outer constraint unit is filled with an unbonded material layer.
Preferably, the cross-shaped mild steel inner core is smaller in section of the constrained section than the unconstrained overhanging section, so that the unconstrained overhanging section of the cross-shaped mild steel inner core is not damaged before the constrained section under the action of seismic force.
Preferably, the lug plates are provided with bolt holes, and the lug plates on the connecting plate are connected with the lug plates on the anchor plates of the upper and lower structures through pin shafts, so that the free rotation of the end parts of the supporting device is ensured.
Preferably, the cross-shaped connecting piece is provided with bolt holes corresponding to the bolt holes in the end part of the cross-shaped mild steel inner core, and the cross-shaped connecting piece and the end part of the cross-shaped mild steel inner core are connected through the over-friction high-strength bolts, so that on one hand, the cross-shaped mild steel inner core is convenient to replace and disassemble, on the other hand, the non-constrained overhanging section of the cross-shaped mild steel inner core is reinforced, and the premature buckling damage of the non-constrained overhanging section is avoided.
Furthermore, a certain distance is kept between the end part of the cross-shaped connecting piece and the end part of the U-shaped steel groove, so that the cross-shaped soft steel inner core can be freely stretched and compressed under the action of an earthquake, and the energy consumption effect is achieved.
Preferably, the upper structure anchorage plate is connected with the lower surface of the bridge; the lower structure anchorage plate is connected with the bridge pier.
Compared with the prior art, the utility model discloses following beneficial effect has:
1) the transverse partition plates are welded in the U-shaped steel grooves at certain intervals along the longitudinal direction, so that the lateral restraining capacity of the outer restraining unit is improved; under the action of earthquake load, the cross-shaped mild steel inner core is difficult to laterally buckle and destabilize, the tension-compression deformation of the inner core is fully exerted, the earthquake energy borne by the structure is dissipated, the replacement frequency of the inner core is reduced, and the maintenance cost is reduced;
2) the assembled external restraint units are connected by bolts, so that the replacement work of the energy-consuming inner core after the earthquake is greatly facilitated, and the assembled external restraint units can be used for multiple times, so that the construction cost is reduced;
3) the device has simple manufacturing process and flow, avoids concrete wet operation and improves the durability of the supporting device.
Drawings
The invention will be described in greater detail hereinafter on the basis of embodiments and with reference to the accompanying drawings, making its features, functions and advantages more intuitive, in which:
FIG. 1 is a general schematic view of the fabricated buckling restrained brace apparatus for improving seismic performance of a bridge according to the present invention;
FIG. 2 is an exploded view of the assembled buckling restrained brace apparatus for improving seismic performance of a bridge according to the present invention;
FIG. 3 is an exploded view of the outer constraint component of the fabricated buckling restrained brace apparatus for improving seismic performance of a bridge according to the present invention;
FIG. 4 is a front view of the fabricated buckling restrained brace apparatus for improving seismic performance of a bridge according to the present invention;
FIG. 5 is a cross-sectional view of the fabricated buckling restrained brace apparatus for improving seismic performance of a bridge according to the present invention;
FIG. 6 is a schematic view of the installation layout of the fabricated buckling restrained brace apparatus for improving the seismic performance of a bridge according to the present invention;
the scores in the figure are indicated as: 101 is a U-shaped steel groove, 102 is a diaphragm plate, 103 is a lateral restraint plate, 104 is a cover plate, 105 is a cushion block, 106 is a high-strength bolt, 201 is a cross-shaped soft steel inner core, 301 is a cross-shaped connecting piece, 302 is a connecting plate, 303 is an ear plate, 304 is a pin shaft, 305 is an upper structure anchor plate, 306 is a lower structure anchor plate, 1 is an assembled type buckling-restrained supporting device, 2 is a bridge, and 3 is a bridge pier.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.
As shown in fig. 1 to 6, the fabricated buckling restrained brace apparatus for improving seismic performance of a bridge of the present example includes an energy dissipation unit, an outer constraint unit, and an end connection unit. The energy consumption unit is a cross-shaped mild steel inner core 201, and the cross-shaped mild steel inner core 201 is made of Q235 steel; the external constraint unit comprises a U-shaped steel groove 101, a diaphragm plate 102, a lateral constraint plate 103, a cover plate 104, a cushion block 105 and a high-strength bolt 106; the end part connecting unit comprises a cross-shaped connecting piece 301, a connecting plate 302, an ear plate 303, a pin shaft 304, an upper structure anchor plate 305 and a lower structure anchor plate 306. Two lateral restraint plates 103 are longitudinally welded in a U-shaped steel groove 101, the distance between the two lateral restraint plates 103 is larger than the thickness of a cross-shaped soft steel inner core 201, a diaphragm plate 102 is longitudinally arranged between a side plate of the U-shaped steel groove 101 and the lateral restraint plates 103 to increase the lateral rigidity of the lateral restraint plates 103, two cover plates 104 cover the upper part of the U-shaped steel groove 101 to form a closed external restraint part, the two external restraint parts are mutually bolted into 180 degrees to form an external restraint unit through a high-strength bolt 106, the assembled assembly of the external restraint unit is realized, the cross-shaped soft steel inner core 201 is convenient to replace and disassemble, and the inner wall of a cross section is formed inside the external restraint unit. The cross-shaped mild steel inner core 201 is clamped in the inner wall of the cross-shaped section of the outer constraint unit, and bolt holes are formed in two ends of the cross-shaped mild steel inner core 201 and connected with the end part connecting unit through bolts. One side of the connecting plate 302 is welded with the cross-shaped connecting piece 301, the other side of the connecting plate is welded with one lug plate 303, the upper structure anchor plate 305 and the lower structure anchor plate 306 are respectively welded with two lug plates 303, and gaps between the two lug plates 303 on the upper structure anchor plate 305 and the lower structure anchor plate 306 are slightly larger than the thickness of the lug plates 303 on the connecting plate 302.
In this embodiment, the height-thickness ratio of the U-shaped steel groove 101 should meet the requirement of local stability, and the slenderness ratio should meet the requirement of overall stability, and specifically, the relevant regulations in the steel structure design specification (GB 50017-2017) should be met.
In this embodiment, a cushion block 105 is arranged between the two external constraint components, and the thickness of the cushion block 105 is slightly larger than the thickness of the cross-shaped mild steel inner core 201, so as to ensure that a gap is left between the cross-shaped mild steel inner core 201 and the inner wall of the external constraint unit.
Furthermore, in this embodiment, the gap between the cross-shaped mild steel inner core 201 and the inner wall of the outer constraint unit is filled with the non-adhesive material layer 202, so that the frictional resistance between the cross-shaped mild steel inner core 201 and the lateral constraint plate 103 and the cover plate 104 is reduced, and the tension-compression deformation energy consumption of the cross-shaped mild steel inner core 201 under the earthquake action is realized.
Preferably, in this embodiment, the cross-shaped mild steel inner core 201 has a smaller cross-section of the constrained section than that of the unconstrained overhanging section, so as to ensure that the unconstrained overhanging section of the cross-shaped mild steel inner core is not destroyed before the constrained section under the action of seismic force.
In this embodiment, the lug plate 303 is provided with a bolt hole, and the lug plate 303 on the connecting plate 302 is connected with the lug plates 303 on the anchor plate 305 of the upper structure and the anchor plate 306 of the lower structure through a pin 304, so that the free rotation of the end part of the supporting device is ensured.
In this embodiment, the cross-shaped connecting piece 301 is provided with bolt holes corresponding to the bolt holes at the end portion of the cross-shaped mild steel inner core 201, and the cross-shaped connecting piece 301 and the end portion of the cross-shaped mild steel inner core 201 are connected through the friction-type high-strength bolts, so that the cross-shaped mild steel inner core 201 is convenient to replace and disassemble, the non-constrained overhanging section of the cross-shaped mild steel inner core 201 is reinforced, and premature buckling damage of the non-constrained overhanging section is avoided.
Furthermore, in this embodiment, a certain distance is kept between the end of the cross-shaped connector 301 and the end of the U-shaped steel groove 101, so that the cross-shaped soft steel inner core 201 can be freely stretched and compressed under the action of an earthquake, and the energy consumption effect is achieved.
In this embodiment, the upper structure anchor plate 305 of the fabricated buckling restrained brace 1 is connected to the lower surface of the bridge 2, and the lower structure anchor plate 306 is connected to the surface of the pier 3.
The assembled buckling restrained brace device for improving bridge seismic performance provided by the specific embodiment has the following main working processes:
under the action of earthquake load, longitudinal relative displacement occurs between the bridge 2 and the bridge pier 3, the cross soft steel inner core 201 is deformed by the load from a bridge system, the cross soft steel inner core 201 can only be subjected to axial tension-compression deformation due to the constraint of the assembled external constraint unit, and earthquake energy is dissipated through the hysteretic performance of the soft steel, so that the earthquake resistant performance of the bridge is improved. After the earthquake, the high-strength bolt 106 on the cover plate 104 and the bolt at the end part of the cross-shaped mild steel inner core 201 are disassembled, so that the cross-shaped mild steel inner core 201 can be conveniently disassembled and replaced, and the assembled assembling mode is favorable for repairing and daily maintenance of the anti-buckling support after the earthquake. It should be noted that, in the present embodiment, the device layout diagram shown in fig. 6 is horizontally arranged along the longitudinal direction of the bridge, so as to improve the longitudinal seismic performance of the bridge, and similarly, if the device is horizontally arranged along the transverse direction of the bridge, the transverse seismic performance of the bridge can also be improved.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. The utility model provides a fabricated buckling restrained brace device for improving bridge anti-seismic performance which characterized in that: the energy-saving device comprises an energy consumption unit, an external constraint unit and an end part connecting unit;
the external restraint unit is provided with an inner wall with a cross-shaped cross section, the energy dissipation unit is a cross-shaped soft steel inner core (201), the energy dissipation unit is clamped in the inner wall with the cross-shaped cross section of the external restraint unit, bolt holes are formed in two ends of the cross-shaped soft steel inner core (201), and the energy dissipation unit is connected with the end part connecting unit through bolts.
2. The fabricated buckling-restrained brace device for improving seismic performance of a bridge as claimed in claim 1, wherein: the external constraint unit comprises a U-shaped steel groove (101), a diaphragm plate (102), a lateral constraint plate (103) and a cover plate (104); the lateral restraint plate (103) is welded in the U-shaped steel groove (101), the diaphragm plate (102) is longitudinally arranged in the U-shaped steel groove (101) to increase the lateral rigidity of the lateral restraint plate (103), the two cover plates (104) cover the upper part of the U-shaped steel groove (101) to form an external restraint part, and the two external restraint parts are bolted at an angle of 180 degrees to each other to form an external restraint unit.
3. The fabricated buckling-restrained brace device for improving seismic performance of a bridge as claimed in claim 2, wherein: the height-thickness ratio and the slenderness ratio of the U-shaped steel groove (101) should meet the relevant regulations of 'steel structure design specifications' (GB 50017-2017).
4. The fabricated buckling-restrained brace device for improving seismic performance of a bridge as claimed in claim 2, wherein: the cushion blocks (105) are arranged between the external constraint components, the thickness of the cushion blocks (105) is slightly larger than that of the cross-shaped mild steel inner core (201), and a gap is reserved between the cross-shaped mild steel inner core (201) and the inner wall of the external constraint unit.
5. The fabricated buckling-restrained brace device for improving seismic performance of a bridge as claimed in claim 4, wherein: and a non-adhesive material layer (202) is filled in a gap between the cross-shaped mild steel inner core (201) and the inner wall of the outer constraint unit.
6. The fabricated buckling-restrained brace device for improving seismic performance of a bridge as claimed in claim 1, wherein: the cross-shaped mild steel inner core (201) is smaller in section of a constrained section than an unconstrained extended section, and the unconstrained extended section of the cross-shaped mild steel inner core (201) is not damaged before the constrained section under the action of seismic force.
7. The fabricated buckling-restrained brace device for improving seismic performance of a bridge as claimed in claim 1, wherein: the end connecting unit comprises a cross connecting piece (301), a connecting plate (302), lug plates (303), a pin shaft (304), an upper structure anchor plate (305) and a lower structure anchor plate (306), wherein the cross connecting piece (301) is welded on one side of the connecting plate (302), the lug plates (303) are welded on the other side of the connecting plate, the two lug plates (303) are respectively welded on the upper structure anchor plate (305) and the lower structure anchor plate (306), and gaps between the two lug plates (303) on the upper structure anchor plate (305) and the lower structure anchor plate (306) are slightly larger than the thickness of the lug plates (303) on the connecting plate (302).
8. The fabricated buckling-restrained brace device for improving seismic performance of a bridge as claimed in claim 7, wherein: bolt holes are formed in the ear plates (303), the ear plates (303) on the connecting plate (302) are connected with the ear plates (303) on the upper structure anchor plate (305) and the lower structure anchor plate (306) through pin shafts (304), and free rotation of the end connecting unit is guaranteed.
9. The fabricated buckling-restrained brace device for improving seismic performance of a bridge as claimed in claim 7, wherein: bolt holes corresponding to the bolt holes at the end part of the cross mild steel inner core (201) are formed in the cross connecting piece (301), and the cross connecting piece (301) is connected with the end part of the cross mild steel inner core (201) through friction type high-strength bolts.
10. The fabricated buckling-restrained brace device for improving seismic performance of a bridge as claimed in claim 7, wherein: the end part of the cross-shaped connecting piece (301) keeps a certain distance from the end part of the U-shaped steel groove (101), so that the cross-shaped soft steel inner core can be freely stretched and compressed under the action of an earthquake, and the energy consumption effect is achieved.
CN201921102419.2U 2019-07-15 2019-07-15 Assembled buckling-restrained brace device for improving anti-seismic performance of bridge Expired - Fee Related CN210712520U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921102419.2U CN210712520U (en) 2019-07-15 2019-07-15 Assembled buckling-restrained brace device for improving anti-seismic performance of bridge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921102419.2U CN210712520U (en) 2019-07-15 2019-07-15 Assembled buckling-restrained brace device for improving anti-seismic performance of bridge

Publications (1)

Publication Number Publication Date
CN210712520U true CN210712520U (en) 2020-06-09

Family

ID=70933581

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921102419.2U Expired - Fee Related CN210712520U (en) 2019-07-15 2019-07-15 Assembled buckling-restrained brace device for improving anti-seismic performance of bridge

Country Status (1)

Country Link
CN (1) CN210712520U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110258301A (en) * 2019-07-15 2019-09-20 上海交通大学 A kind of anti-buckling support device of assembled for improving anti-seismic performance of beam bridge
CN113152711A (en) * 2021-03-17 2021-07-23 河北工业大学 Buckling restrained brace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110258301A (en) * 2019-07-15 2019-09-20 上海交通大学 A kind of anti-buckling support device of assembled for improving anti-seismic performance of beam bridge
CN113152711A (en) * 2021-03-17 2021-07-23 河北工业大学 Buckling restrained brace

Similar Documents

Publication Publication Date Title
CN107675800B (en) Self-resetting deformation coordination floor slab node structure
CN103122662B (en) A kind of buckling restrained brace containing viscoelastic material
CN210712520U (en) Assembled buckling-restrained brace device for improving anti-seismic performance of bridge
CN108532794B (en) Assembled steel tube concrete diagonal bracing steel plate shear wall
CN202672400U (en) Novel bamboo type steel tube buckling restricting energy consumption support
CN108952288B (en) Installation method of double-torsion anti-buckling device of buckling-restrained brace
CN203188399U (en) Metal damper utilizing steel plate surface internal deformation to consume energy
CN103206029B (en) Micro-vibration energy-consumption viscoelastic buckling restrained brace
CN110258301A (en) A kind of anti-buckling support device of assembled for improving anti-seismic performance of beam bridge
CN2900658Y (en) Accentric support
CN207620154U (en) A kind of replaceable folded plate mild steel damper and shear wall structure
CN207211420U (en) A kind of steel reinforced concrete shear walls with replaceable cross mild steel damper
CN200989013Y (en) Lead restrained buckling support composite energy-consumption device
CN111270898A (en) Cross-shaped cross-section full-assembly type buckling-restrained supporting component
CN201056770Y (en) Node energy-consumption device
WO2020252835A1 (en) Shear-type steel truss coupling beam having friction dampers for fast post-earthquake recovery
CN203230060U (en) Micro-vibration energy-dissipation viscoelastic buckling restrained brace
CN113338469B (en) Assembled composite graded energy dissipation buckling restrained brace component
CN103590505A (en) Honeycomb-type steel plate damper
CN209854964U (en) Bearing-energy dissipation structure with double-order yield characteristic
CN114046078A (en) Assembly type shear wall with replaceable edge component
CN210369407U (en) Building shock attenuation power consumption structure
CN109296102B (en) Shear key damping support capable of realizing rigidity degradation and energy consumption
CN111173155B (en) Shearing-bending parallel connection type graded energy dissipation damper
CN209742120U (en) Buckling-restrained shear type damper with strong energy consumption performance under three-dimensional stress condition

Legal Events

Date Code Title Description
GR01 Patent grant
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: 20200609