CN113482166B - Shear wall connecting assembly and shear wall structure - Google Patents
Shear wall connecting assembly and shear wall structure Download PDFInfo
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- CN113482166B CN113482166B CN202110813931.3A CN202110813931A CN113482166B CN 113482166 B CN113482166 B CN 113482166B CN 202110813931 A CN202110813931 A CN 202110813931A CN 113482166 B CN113482166 B CN 113482166B
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- 239000004033 plastic Substances 0.000 claims abstract description 7
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- 238000005452 bending Methods 0.000 abstract description 4
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- 230000000149 penetrating effect Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
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- 238000006073 displacement reaction Methods 0.000 description 4
- 230000009970 fire resistant effect Effects 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
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- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000009439 industrial construction Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
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- 239000011490 mineral wool Substances 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/388—Separate connecting elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention provides a shear wall connecting assembly and a shear wall structure, and relates to the technical field of building structures. The first fastener is provided with a through hole, the first connecting plate is used for being erected at the edge of the through hole, and the first connecting piece is used for penetrating through the through hole and being detachably connected with the first connecting plate. The first connecting piece and the first fastener are respectively connected with the first concrete member and the second concrete member. In the earthquake process, the first connecting piece pulls the first connecting plate, and simultaneously under the supporting force effect of the edge of the through hole, the first connecting plate is subjected to plastic bending deformation, so that the effect of protecting the first connecting piece to keep elasticity is achieved, and the concrete member is ensured to be damaged at a low level or not damaged. And can make the junction closure of post-earthquake first concrete member and second concrete member under the pulling force effect of first connecting piece, first connecting plate can conveniently change after the shake.
Description
Technical Field
The invention relates to the technical field of building structures, in particular to a shear wall connecting assembly and a shear wall structure.
Background
In the field of construction, the bolt connection is a common 'dry connection' mode, has the characteristics of high standardization degree and high construction speed, and is one of important ways for popularizing the industrial production and construction of the fabricated concrete construction.
The bolted connection between concrete members is typically made by joining two concrete members together by bolts that pass through a splice between the two concrete members. And load is transferred between the concrete members by the bolt being pulled and sheared. Concrete elements include, but are not limited to, foundations, shear walls. When bolting is used, it is often designed according to the principle of "strong connection", i.e. the bolts remain elastic under the action of an earthquake without yielding, so that plastic failure usually occurs in the concrete member.
Specifically, when two concrete members are connected by bolts, plastic damage usually does not occur at the joints of the bolts due to the high strength of the bolts, but easily occurs in the concrete members, so that the concrete members are not easily repaired after earthquake. Therefore, how to solve the problem that the bolt connection mode in the prior art is easy to cause damage to occur in the concrete member, so that the concrete member is not easy to repair after earthquake is a technical problem which needs to be solved by the person in the art.
Disclosure of Invention
The invention provides a shear wall connecting assembly and a shear wall structure, which can prevent or reduce the damage of a prefabricated part, and are used for solving the defect that the prefabricated part is difficult to repair after earthquake due to the fact that the damage is easy to occur in the prefabricated part in a bolt connection mode in the prior art, so that the effect of facilitating maintenance and replacement is achieved.
The invention provides a shear wall connection assembly, which comprises a first connection structure, wherein the first connection structure comprises a first connection piece, a first fastener and a first connection plate;
wherein the first connecting piece and the first fastener are used for being connected with a first concrete member and a second concrete member respectively;
the first fastener is provided with a through hole, the first connecting plate is erected at the edge of the through hole, and the first connecting piece is used for penetrating through the through hole and detachably connecting with the first connecting plate.
According to the shear wall connection assembly provided by the invention, the first connection structure further comprises the backing plate, the size of the backing plate is smaller than that of the through hole and is arranged in the through hole, and the backing plate is provided with the first through hole for the first connection piece to pass through.
According to the shear wall connection assembly provided by the invention, the first connection structure further comprises a first nut, the first connection plate is provided with a second through hole for the first connection piece to pass through, and the first connection piece passes through the second through hole and is in threaded connection with the first nut.
According to the shear wall connection assembly provided by the invention, the first fastener is provided with the first box body structure with the opening at one side, the through hole is formed in the box wall at the bottom of the first box body structure, and the first connection plate is used for being arranged in the first box body structure.
The shear wall connection assembly provided by the invention further comprises a second connection structure, wherein the second connection structure comprises a second connection piece, a second fastener and a second connection plate;
wherein the second connecting piece and the second fastener are used for being connected with the first concrete member and the third concrete member respectively;
the second fastener is provided with a chute which is communicated with the second fastener, the second connecting plate is used for being erected at the edge of the chute, and the second connecting piece is used for penetrating through the chute to be detachably connected with the second connecting plate.
According to the shear wall connection assembly provided by the invention, the friction plate is arranged between the second fastener and the second connecting plate, and the friction plate is provided with the third through hole for the second connecting piece to pass through.
According to the shear wall connection assembly provided by the invention, the second connection structure further comprises a second nut, a fourth through hole for the second connection piece to pass through is formed in the second connection plate, and the second connection piece passes through the fourth through hole and is in threaded fit with the second nut.
According to the shear wall connection assembly provided by the invention, the number of the second connection pieces is at least two, and the at least two second connection pieces are distributed along the length direction of the sliding groove.
According to the shear wall connection assembly provided by the invention, the second fastener is a second box structure with an opening at one side, the sliding groove is arranged on the box wall at the bottom of the second box structure, and the second connecting plate is used for being arranged in the second box structure.
The invention also provides a shear wall structure, which comprises a plurality of shear wall units connected with each other and a plurality of shear wall connecting assemblies as described in any one of the above, wherein the shear wall connecting assemblies are arranged between two adjacent shear wall units.
The shear wall connecting assembly is connected with a first concrete member and a second concrete respectively through the first connecting piece and the first fastener. The first connecting plate is arranged at the through hole of the first fastener, and the first connecting piece penetrates through the through hole to be connected with the first connecting plate. In the earthquake process, the joint of the first concrete member and the second concrete member is continuously opened and closed, so that the first connecting piece pulls the first connecting plate. And under the simultaneous action of the tensile force of the first connecting piece and the supporting force of the edge of the through hole, the first connecting plate is subjected to plastic bending deformation so as to achieve the effect of protecting the first connecting piece and keeping the first connecting piece elastic, and the damage is caused at the first connecting plate, so that the concrete member is ensured to be damaged with low or no damage. And the connection part of the first concrete member and the second concrete member can be closed after the earthquake under the action of the tensile force of the first connecting piece, namely the building structure can be self-reset, so that the building structure has good toughness. The first connecting plate with damage can be replaced very conveniently after earthquake.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a shear wall structure provided by the present invention;
FIG. 2 is a schematic structural view of a first connection structure of the shear wall connection assembly provided by the present invention;
FIG. 3 is a schematic view of a connection structure between a first connecting member and a first connecting plate according to the present invention;
FIG. 4 is a schematic structural view of a first case structure according to the present invention;
FIG. 5 is a schematic structural view of a second connection structure of the shear wall connection assembly provided by the present invention;
FIG. 6 is a schematic structural view of a second connecting plate according to the present invention;
FIG. 7 is a schematic view of a friction plate according to the present invention;
reference numerals:
1: a first connection structure; 102: a first connector; 104: a first connection plate;
106: a through hole; 108: a backing plate; 110: a first nut;
112: a first box structure; 2: a second connection structure; 202: a second connector;
204: second box structure 206: a second connecting plate; 208: a chute;
210: friction plate 212: a third through hole; 214: a fourth through hole;
216: a second nut; 3: u-shaped ribs; 4: a shear wall;
5: a foundation.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A shear wall connection assembly in accordance with an embodiment of the present invention is described below in connection with fig. 1-7.
Specifically, the shear wall connection assembly comprises a first connection structure 1. The first connecting structure 1 includes a first connecting member 102, a first fastener, and a first connecting plate 104. Wherein the first connector 102 and the first fastener are for connecting with a first concrete element and a second concrete element, respectively. The first fastener is provided with a through hole 106. The first connection plate 104 is erected at the edge of the through hole 106, and is capable of plastic deformation at the through hole 106. Further, the first connection plate 104 is a first connection plate 104 that is plastically deformable. For example, the first connection plate 104 may be a bendable metal plate. The metal plate includes, but is not limited to, a steel plate. The first connector 102 is detachably connected to the first connector board 104 through the through hole 106.
So configured, the first and second concrete elements are connected by the first connector 102 and the first fastener, respectively. For example, as shown in fig. 1, the first concrete member may be a shear wall 4 and the second concrete member may be a foundation 5. Alternatively, the second concrete member may be a shear wall 4 disposed above or below the shear wall 4. The first connection plate 104 is disposed at the through hole 106 of the first fastener, and the first connection member 102 is connected to the first connection plate 104 through the through hole 106. During the earthquake, the connection parts of the first concrete member and the second concrete member are continuously opened and closed, so that the first connecting piece 102 pulls the first connecting plate 104. And under the simultaneous action of the tensile force of the first connecting piece 102 and the supporting force of the edge of the through hole 106, the first connecting plate 104 is subjected to plastic bending deformation, so as to achieve the effect of protecting the first connecting piece, keeping the first connecting piece elastic, and enabling the damage to occur at the first connecting plate 104, thereby ensuring the low damage or no damage of the concrete member. And, can make the junction of first concrete member and second concrete member close after the shake under the pulling force of first connecting piece 102, namely the building structure can be from restoring to the throne to make the building structure have good "toughness". The damaged first connecting plate 104 can be replaced very conveniently after the earthquake so as to quickly restore the functions of the building structure.
In some embodiments provided by the present invention, the first connection structure 1 further comprises a backing plate 108. The size of the pad 108 is smaller than the size of the through-hole 106, and the pad 108 is disposed within the through-hole 106. The pad 108 is provided with a first through hole for the first connector 102 to pass through. By providing the pad 108, the first connecting member 102 can abut against the wall of the first through hole on the pad 108, and the pad 108 abuts against the wall of the through hole 106. Thereby avoiding the first concrete member and the second concrete member from generating relative horizontal displacement. For example, as shown with reference to fig. 1, it is possible to prevent relative horizontal displacement between the shear wall 4 and the foundation 5, or between two upper and lower adjacent shear walls 4.
In some embodiments provided by the present invention, the first connection structure 1 further comprises a first nut 110. The first connecting plate 104 is provided with a second through hole for the first connecting piece 102 to pass through. The first coupling member 102 is threaded through the second through-hole with the first nut 110. The first connection member 102 is detachably connected to the first connection plate 104 by screwing the first nut 110 to the first connection member 102, so that the first connection plate 104 can be replaced conveniently. In addition, the connection by the first nut 110 can improve the connection efficiency between concrete members and shorten the construction period.
Alternatively, the first connector 102 may be a high strength bolt. The first end of the first connector 102 may be embedded within a concrete member such as the shear wall 4 or foundation 5. The second end of the first connector 102 may be adapted to threadedly mate with the first nut 110.
In some embodiments of the present invention, the first fastener is configured as a first box structure 112 with an opening on one side. The through hole 106 is provided in a box wall at the bottom of the first box structure 112. The first connection plate 104 is configured to be disposed inside the first box structure 112. So configured, the first box structure 112 may be embedded in the concrete member and provide an installation space for the first nut 110, and the opening on the first side of the first box structure 112 may allow a constructor to screw the nut and disassemble the first connecting plate 104.
Optionally, the first box structure 112 is filled with a high strength grouting material. The high strength grouting material is filled in the first box structure 112 to improve the supporting capability of the first box structure 112 and protect the first connecting piece 102 and the first nut 110 from being corroded.
Alternatively, the first box structure 112 may be integrally formed by stamping using low carbon steel or low alloy steel, so that the first box structure 112 has better structural strength.
Optionally, the first box structure 112 is further provided with a U-shaped rib 3. By providing the U-shaped ribs 3, the bonding area with the concrete member can be increased, thereby increasing the connection strength of the first box structure 112 with the concrete member.
In some embodiments provided by the present invention, the shear wall connection assembly further comprises a second connection structure 2. The second connection structure 2 includes a second connection member 202, a second fastener, and a second connection plate 206. Wherein the second connector 202 and the second fastener are for connecting with the first concrete element and the third concrete element, respectively. The second fastener is provided with a chute 208 which is arranged in a penetrating way. The second connection plate 206 is configured to be disposed at the chute 208. The second connector 202 is configured to detachably connect to the second connecting plate 206 through the chute 208.
So configured, the second connector 202 and the second fastener are connected to the first concrete element and the third concrete element, respectively. For example, the first concrete member may be a shear wall 4 and the third concrete member may be a shear wall 4 horizontally adjacent to the shear wall 4. The second connecting plate 206 is disposed at a chute 208 of the second fastener, and the second connecting member 202 passes through the through hole 106 and is connected to the second connecting plate 206. In the earthquake process, the first concrete member and the third concrete member generate relative translation at the joint, so that the second connecting piece 202 slides along the chute 208, and the second connecting piece 202 drives the second connecting plate 206 and the second fastener to generate friction in a relative displacement manner, so that earthquake energy is dissipated, the shaking or swinging amplitude of the building structure is reduced, and the effect of reducing the damage degree of the building structure is achieved.
In some embodiments of the present invention, a friction plate 210 is disposed between the second fastening member and the second connecting plate 206, and a third through hole 212 is formed in the friction plate 210 for the second connecting member 202 to pass through. The second connector 202 is connected to the second connecting plate 206 through the friction plate 210. The friction plate 210 has better energy consumption effect, and can be conveniently replaced after the friction plate 210 is worn out and cannot be used. Alternatively, friction plate 210 includes, but is not limited to, a brass or polypropylene plate.
In some embodiments provided by the present invention, the second connection structure 2 further comprises a second nut 216. The second connecting plate 206 is provided with a fourth through hole 214 for the second connecting member 202 to pass through, and the second connecting member 202 passes through the fourth through hole 214 to be in threaded engagement with a second nut 216. The second connection plate 206 can be easily installed and removed by screwing the second nut 216 to the second connection member 202 so that the second connection member 202 is detachably connected to the second connection plate 206. In addition, the connection by the second nut 216 can improve the connection efficiency between concrete members and shorten the construction period.
Alternatively, the second connector 202 may be a high strength bolt. The first end of the second connector 202 may be embedded within a concrete member such as the shear wall 4. A second end of the second connector 202 may be adapted to threadably mate with a second nut 216.
Optionally, a spacer is provided between the second nut 216 and the second connection plate 206. For example, the gasket includes, but is not limited to, a check gasket.
In some embodiments provided by the present invention, the number of second connectors 202 is at least two. At least two second connectors 202 are distributed along the length of the chute 208. Through setting up two first connecting pieces 102, can fix a position friction disc 210 and second connecting plate 206, prevent to appear rotating at friction in-process friction disc 210 and second connecting plate 206 to guarantee that second connection structure 2 can play better friction power consumption effect.
In some embodiments of the present invention, the second fastener is configured as a second box structure 204 with an opening on the first side. The chute 208 is provided on the box wall at the end of the second box structure 204. The second connection plate 206 is disposed inside the first box structure 112. So configured, the second box structure 204 may be pre-buried in the concrete member and provide an installation space for the second nut 216, and the opening on the first side of the second box structure 204 may allow a constructor to screw the nut, disassemble the second connecting plate 206, or disassemble the friction plate 210.
Optionally, the second box structure 204 is filled with a flexible fire resistant material. By filling the second box structure 204 with a flexible fire-resistant material, the second connector 202 and the second nut 216 can be protected from corrosion on the one hand, and fire resistance can be improved on the other hand. For example, the flexible fire-resistant material includes, but is not limited to, rock wool or fiberglass wool.
Alternatively, the second box structure 204 may be integrally formed by stamping using low carbon steel or low alloy steel, so that the second box structure 204 has better structural strength.
Optionally, the second box structure 204 is further provided with a U-shaped rib 3. By providing the U-shaped ribs 3, the bonding area with the concrete member can be increased, thereby increasing the connection strength of the second box structure 204 with the concrete member.
There is also provided in an embodiment of the invention a shear wall structure comprising a plurality of shear wall units connected to each other and a plurality of shear wall connection assemblies as mentioned in any of the above. The shear wall connection assembly is arranged between two adjacent shear wall units. Further, the first connection structure 1 is disposed between two shear wall units adjacent to each other. For example, the first connector 102 and the first fastener are connected to two shear wall units adjacent to each other up and down, respectively. The second connection structure 2 is arranged between two horizontally adjacent shear wall units. For example, the second connector 202 and the second fastener are respectively connected to two shear wall units horizontally adjacent.
So set up, during the earthquake, the first connecting plate 104 of first connection structure 1 between two adjacent shear wall units about can yielding bending deformation, makes the damage take place in first connection structure 1 to avoid two adjacent shear wall units about by the damage. And under the action of the first connecting piece 102, the two shear wall units can be automatically reset after an earthquake, so that the shear wall structure has good toughness. Moreover, the first connecting plate 104 can be conveniently replaced after the earthquake, so that the shear wall structure can quickly recover the structure function.
The two shear wall units which are horizontally adjacent are connected through the second connecting structure 2, and the second connecting structure 2 can be used for consuming seismic energy through friction by utilizing the relative displacement of the two shear wall units which are horizontally adjacent, so that the effect of reducing the seismic response and damage degree of the shear wall structure is achieved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A shear wall connection assembly, comprising:
the first connecting structure comprises a first connecting piece, a first fastener and a first connecting plate, wherein the first connecting piece and the first fastener are used for being connected with a first concrete member and a second concrete member respectively, the second concrete member is adjacent to the first concrete member up and down, the first fastener is provided with a through hole, the first connecting plate is erected at the edge of the through hole and is used for generating plastic deformation at the through hole, and the first connecting piece passes through the through hole and is detachably connected with the first connecting plate;
the second connection structure comprises a second connection piece, a second fastener and a second connection plate, wherein the second connection piece and the second fastener are used for being connected with the first concrete member and the third concrete member respectively, the third concrete member is horizontally adjacent to the first concrete member, a chute which is communicated with the second fastener is arranged on the second fastener, the second connection plate is erected at the edge of the chute, the second connection piece penetrates through the chute and is detachably connected with the second connection plate, and the second connection piece can slide along the chute.
2. The shear wall connection assembly of claim 1, wherein the first connection structure further comprises a spacer plate having a size smaller than the through-hole and disposed within the through-hole, the spacer plate having a first through-hole through which the first connection member passes.
3. The shear wall connection assembly of claim 1, wherein the first connection structure further comprises a first nut, the first connection plate is provided with a second through hole through which the first connection member passes, and the first connection member passes through the second through hole and is in threaded connection with the first nut.
4. The shear wall connection assembly of claim 1, wherein the first fastener is provided as a first box structure having an opening on one side, the through hole is provided on a box wall at a bottom of the first box structure, and the first connection plate is provided inside the first box structure.
5. The shear wall connection assembly of claim 1, wherein a friction plate is disposed between the second fastener and the second connection plate, and a third through hole is disposed on the friction plate for the second connection member to pass through.
6. The shear wall connection assembly of claim 1, wherein the second connection structure further comprises a second nut, a fourth through hole is formed in the second connection plate for the second connection member to pass through, and the second connection member passes through the fourth through hole to be in threaded engagement with the second nut.
7. The shear wall connection assembly of claim 1, wherein the number of second connectors is at least two, the at least two second connectors being distributed along the length of the runner.
8. The shear wall connection assembly of claim 1, wherein the second fastener is provided as a second box structure with an opening on one side, the chute is provided on a box wall at the bottom of the second box structure, and the second connection plate is provided inside the second box structure.
9. A shear wall structure, comprising a plurality of shear wall units connected with each other and a plurality of shear wall connection assemblies according to any one of claims 1-8, wherein two adjacent upper and lower shear wall units are connected by the first connection structure, and two horizontally adjacent shear wall units are connected by the second connection structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110813931.3A CN113482166B (en) | 2021-07-19 | 2021-07-19 | Shear wall connecting assembly and shear wall structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110813931.3A CN113482166B (en) | 2021-07-19 | 2021-07-19 | Shear wall connecting assembly and shear wall structure |
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| CN113482166A CN113482166A (en) | 2021-10-08 |
| CN113482166B true CN113482166B (en) | 2023-08-11 |
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