CN113323176A - Anti-buckling double-yield-point shearing type mild steel damper with limiting function - Google Patents

Anti-buckling double-yield-point shearing type mild steel damper with limiting function Download PDF

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Publication number
CN113323176A
CN113323176A CN202110431543.9A CN202110431543A CN113323176A CN 113323176 A CN113323176 A CN 113323176A CN 202110431543 A CN202110431543 A CN 202110431543A CN 113323176 A CN113323176 A CN 113323176A
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CN
China
Prior art keywords
buckling
yield
restrained
energy dissipation
mild steel
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Pending
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CN202110431543.9A
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Chinese (zh)
Inventor
甄伟
閤东东
程俊飞
赵帆
张磊
余方程
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Beijing Institute of Architectural Design Group Co Ltd
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Beijing Institute of Architectural Design Group Co Ltd
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Priority to CN202110431543.9A priority Critical patent/CN113323176A/en
Publication of CN113323176A publication Critical patent/CN113323176A/en
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/98Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04HBUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02Buildings, 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

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Environmental & Geological Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

The invention relates to the technical field of building shock absorption structures, in particular to a buckling-restrained double-yield-point shear type mild steel damper with a limiting function, which comprises: the energy dissipation device comprises an energy dissipation web plate, an anti-buckling clamping plate, an upper base and a lower base; the number of the energy dissipation webs can be two, and the two energy dissipation webs are arranged between the two layers of buckling-restrained clamping plates; the upper ends of the energy dissipation web plate and the buckling-restrained clamping plate are connected to the upper base; the lower ends of the energy dissipation web plate and the buckling-restrained clamping plate are connected to the lower base. The anti-collapse device has a simple structure, not only plays a role in restraining the core web plate in an earthquake, but also fully plays the role of rigidity and limiting function in the extreme state of a major earthquake, limits the shearing deformation of the damper in the major earthquake, fully plays the role of the anti-collapse plate and improves the anti-collapse capability of the structure.

Description

Anti-buckling double-yield-point shearing type mild steel damper with limiting function
Technical Field
The invention relates to the technical field of building shock absorption structures, in particular to a buckling-restrained double-yield-point shear type mild steel damper with a limiting function.
Background
Earthquake disasters have great influence on the life safety of people, and are mainly caused by excessive deformation, damage or collapse of building structures in the earthquake process. The energy dissipation and shock absorption structure is characterized in that an energy dissipation component or device is arranged, so that the structure consumes earthquake energy when deforming, and plays a role of a fuse, thereby effectively protecting the safety of a main body structure in a strong earthquake.
The metal shearing type mild steel damper has been widely used in recent years due to its excellent energy consumption capability. The damper enters a yielding state under a small earthquake, dissipates earthquake energy, provides an additional damping ratio for the whole structure, and simultaneously can provide certain lateral stiffness and reduce horizontal lateral displacement. The metal shearing type mild steel damper is arranged in a structure at a relative deformation position, is generally arranged among layers, has small floor area, can be arranged at a wall position between windows, and does not hinder the building function. The metal shearing type mild steel damper utilizes shearing deformation and plasticity accumulation of low-yield-point steel in a plane, obviously dissipates energy of the earthquake motion input structure through a reasonable structure, and has the advantages of stable performance, simple structure, lower maintenance cost and the like.
The metal shearing type mild steel damper is stiffened by reasonably constructing the web plate, selects special materials, ensures that the web plate of the damper is yielding and not buckling under the reciprocating load effect, has the characteristics of good fatigue performance and strong deformability, dissipates earthquake motion input energy, and reduces earthquake reaction. Metal dampers have found widespread use in recent years due to their excellent energy dissipation capabilities. The damper enters a yielding state under a small earthquake, dissipates earthquake energy, provides an additional damping ratio for the whole structure, and simultaneously can provide certain lateral stiffness to further reduce horizontal lateral displacement. The typical mild steel damper consists of an energy consumption plate, a connecting plate and a stiffening rib, mainly takes the shear yield energy consumption of the energy consumption plate as the main energy consumption, and has full energy consumption capability.
However, the prior art has the following disadvantages:
the conventional shear steel plate damper prevents the buckling phenomenon of the shear steel plate by welding stiffening ribs on the shear steel plate in a working state, but the welding process can influence the stability and the low-cycle fatigue resistance of the shear steel plate. In order to enhance the ultimate deformation and energy dissipation capability of the metal shearing damper, the buckling-restrained clamp plate can be arranged on the outer side of the energy dissipation web plate, the out-of-plane deformation of the shearing steel plate can be effectively prevented by the buckling-restrained clamp plate scheme, the distribution of the main tensile stress and the main compressive stress of the steel plate is changed, the out-of-plane buckling energy dissipation mechanism of the steel plate is changed into a plane shearing energy dissipation mechanism, and the mechanical property of the shearing steel plate is improved.
The shear type mild steel damper belongs to a displacement type damper, and the rigidity after yielding is far smaller than the initial rigidity. If the damper enters a working state under a small earthquake, the energy dissipation capability of the damper under a large earthquake is limited, and especially, the deformation between structural layers is overlarge at the moment, so that the residual deformation of the structure is easily overlarge; if the damper is expected to play a larger energy dissipation role under a large earthquake, the damper cannot flex and dissipate energy under a small earthquake due to overlarge rigidity and yield force, and an additional damping ratio is provided.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide an anti-buckling double-yield-point shearing type mild steel damper with a limiting function, which is used for solving the technical problems in the prior art. The first energy dissipation web plate with the low yield point can yield and dissipate energy under a small earthquake, the second energy dissipation web plate with the high yield point can yield and dissipate energy under a medium earthquake and a large earthquake, the rigidity and the energy dissipation capability of the structure under the medium earthquake and the large earthquake are enhanced, the requirement of increasing earthquake action is met, the anti-buckling clamping plate not only plays a role in restraining the core web plate when an earthquake occurs, but also fully plays a role in rigidity and limiting under the extreme state of the large earthquake, limits the shearing deformation of the damper under the large earthquake, fully plays a role in preventing the buckling plate, and improves the collapse resistance of the structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an anti-buckling double-yield-point shearing type mild steel damper with a limiting function, which comprises: the energy dissipation device comprises an energy dissipation web plate, an anti-buckling clamping plate, an upper base and a lower base;
the energy dissipation web plate is arranged between the two layers of buckling-restrained clamp plates;
the upper ends of the energy dissipation web plate and the buckling-restrained clamping plate are connected to the upper base;
the lower ends of the energy dissipation web plate and the buckling-restrained clamping plate are connected to the lower base.
Preferably, the upper ends of the energy dissipation web plate and the buckling-restrained clamping plate are connected to the upper base through first bolts; the lower ends of the energy dissipation web plate and the buckling-restrained clamping plate are connected to the lower base through first bolts; and the side parts of the two layers of the buckling-restrained clamp plates are connected through a second bolt.
Preferably, the dissipater web has a first yield section;
the upper part of the first yielding section is provided with an upper connecting part for a first bolt to penetrate through;
the lower part of the first yielding section is provided with a lower connecting part for penetrating and installing a first bolt;
the width of the first yielding section gradually decreases from the upper part to the middle part and then gradually increases from the middle part to the lower part.
Preferably, circular bolt holes are formed in the upper connecting portion and the lower connecting portion of the first yielding section.
Preferably, the anti-buckling splint has a second yield section;
the upper part of the second yielding section is provided with an upper connecting part for penetrating and installing a first bolt;
the lower part of the second yielding section is provided with a lower connecting part for penetrating and installing a first bolt;
the side part of the second yielding section is provided with a side connecting part for penetrating and installing a second bolt;
the width of the second yielding section gradually decreases from the upper part to the middle part and then gradually increases from the middle part to the lower part.
Preferably, the upper connecting part of the second yielding segment is provided with an oblong bolt hole.
Preferably, circular bolt holes are formed in the lower connecting portion and the side connecting portion of the second yielding section.
Preferably, the width of the first yielding segment is less than the width of the second yielding segment.
By adopting the technical scheme, the invention has the following beneficial effects:
the buckling-preventing clamping plate is arranged on the outer side of the energy dissipation web plate, so that the ultimate deformation and energy dissipation capacity of the damper are improved, the effect of the buckling-preventing clamping plate is fully exerted, and the collapse resistance of the structure is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a cross-sectional view of a buckling restrained double-yield-point shear type mild steel damper provided by an embodiment of the invention;
figure 2 is a schematic structural view of a first energy dissipating web provided by an embodiment of the invention;
figure 3 is a schematic structural view of a second energy dissipating web provided by an embodiment of the invention;
FIG. 4 is a first structural view of an anti-buckling splint according to an embodiment of the present invention;
FIG. 5 is a second structural view of the anti-buckling splint according to the exemplary embodiment of the present invention;
fig. 6 is a perspective view of a buckling-restrained double-yield-point shear type mild steel damper provided by an embodiment of the invention.
Icon: 1-an upper base; 2-anti-buckling splints; 3-a second bolt; 4-energy dissipation web plate; 5-a first bolt; 6-lower base.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 1 to 6, the present embodiment provides a buckling restrained dual-yield-point shear type mild steel damper with a limiting function, including: the energy dissipation device comprises an energy dissipation web plate 4, an anti-buckling clamping plate 2, an upper base 1 and a lower base 6; the energy dissipation web plate 4 is arranged between the two layers of buckling-restrained clamping plates 2; the upper ends of the energy dissipation web plate 4 and the buckling-restrained clamp plate 2 are connected to the upper base 1; the lower ends of the energy dissipation web plate 4 and the buckling-restrained clamping plate 2 are connected to the lower base 6.
In this embodiment, the number of the energy dissipation webs may be two. It will of course be appreciated that the number of dissipater webs may be provided in other numbers, for example one, three, etc.
In this embodiment, the energy dissipation web 4, the buckling-restrained clamp plate 2, the upper base 1 and the lower base 6 may be connected by bolts. It should be noted that the type of the bolt and the position of the spiral hole can be flexibly set, and is not limited.
For example: the upper ends of the energy dissipation web plate 4 and the buckling-restrained clamping plate 2 are connected to the upper base 1 through first bolts 5; the lower ends of the energy dissipation web plate 4 and the buckling-restrained clamping plate 2 are connected to the lower base 6 through first bolts 5; the side parts of the two layers of the anti-buckling splints 2 are connected through second bolts 3.
In this embodiment, preferably, the energy dissipating web 4 has a first yielding segment; the upper part of the first yielding section is provided with an upper connecting part for a first bolt 5 to penetrate; the lower part of the first yielding section is provided with a lower connecting part for penetrating and installing a first bolt 5; the width of the first yielding section gradually decreases from the upper part to the middle part and then gradually increases from the middle part to the lower part. Specifically, circular bolt holes are formed in the upper connecting portion and the lower connecting portion of the first yielding section.
In the present embodiment, preferably, the anti-buckling splint 2 has a second yielding segment; the upper part of the second yielding section is provided with an upper connecting part for a first bolt 5 to penetrate; the lower part of the second yielding section is provided with a lower connecting part for penetrating and installing a first bolt 5; the side part of the second yielding section is provided with a side connecting part for penetrating and installing a second bolt 3; the width of the second yielding section gradually decreases from the upper part to the middle part and then gradually increases from the middle part to the lower part.
Preferably, the upper connecting part of the second yielding segment is provided with an oblong bolt hole.
Preferably, circular bolt holes are formed in the lower connecting portion and the side connecting portion of the second yielding section.
Preferably, the width of the first yielding segment is less than the width of the second yielding segment.
It should be noted that, as shown in fig. 3 to 5, the opening of the oblong bolt hole is not limited to the upper connecting portion of the second yielding segment, and may be formed in the lower connecting portion of the second yielding segment.
The specific working mechanism of this embodiment is as follows:
(1) under the action of small vibration: the energy dissipation web plate of the first yield section with the low yield point enters a working state, the energy dissipation web plate is in a yield energy consumption state, and due to the releasing action of the long round bolt hole, the energy dissipation web plate of the second yield section with the high yield point and the anti-buckling clamping plate do not enter the working state and are only used for limiting the out-of-plane deformation of the energy dissipation web plate.
(2) Under the action of the medium shock: the deformation ratio between the structural layers is remarkably increased under a small earthquake, the length released by the long round bolt holes at the two ends of the second yielding section energy dissipation web plate is reached or exceeded, the length threshold value of the long round bolt holes at the two ends of the anti-buckling clamping plate is not reached, the second yielding section energy dissipation web plate with a high yielding point enters a working state, and the anti-buckling clamping plate does not enter the working state and is only used for limiting the out-of-plane deformation of the first yielding section energy dissipation web plate and the second yielding section energy dissipation web plate.
(3) Under the action of a large earthquake: the interlaminar horizontal deformation of the structure is obviously larger than that of the interlaminar horizontal deformation of the structure under the condition of moderate shock, the interlaminar horizontal deformation reaches or exceeds the release length of the long round bolt holes at the two ends of the buckling-restrained clamp plate, the shearing rigidity of the buckling-restrained clamp plate plays a limiting role, and the interlaminar deformation of the structure is reduced.
(4) The buckling-restrained double-yield-point shear type mild steel damper with the limiting function well utilizes the energy dissipation mechanism and the product characteristics of the shear type mild steel damper, provides greater rigidity under the condition of heavy earthquake, improves the collapse resistance of the structure, and is a shock absorption product with excellent performance.
To sum up, the technical scheme has the following advantages:
the invention has simple structure and mainly comprises a buckling-restrained splint and two energy dissipation webs with different yield points. The first energy dissipation web plate with the low yield point and the second energy dissipation web plate with the high yield point are well suitable for the requirements of energy dissipation and rigidity of earthquake action increase, the buckling-proof clamping plate not only plays a role in restraining the core web plate during an earthquake, but also fully plays the rigidity and has a limiting function in a large earthquake limit state, so that the shearing deformation of the damper under a large earthquake is limited, the effect of the buckling-proof plate is fully played, and the collapse resistance of the structure is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. The utility model provides a take limit function's two yield point of buckling prevention shearing type mild steel attenuator which characterized in that includes: the energy dissipation device comprises an energy dissipation web plate, an anti-buckling clamping plate, an upper base and a lower base;
the energy dissipation web plate is arranged between the two layers of buckling-restrained clamp plates;
the upper ends of the energy dissipation web plate and the buckling-restrained clamping plate are connected to the upper base;
the lower ends of the energy dissipation web plate and the buckling-restrained clamping plate are connected to the lower base.
2. The buckling-restrained double-yield-point shear-type mild steel damper with the limiting function as claimed in claim 1, wherein the upper ends of the energy dissipation web plate and the buckling-restrained clamping plate are connected to the upper base through first bolts; the lower ends of the energy dissipation web plate and the buckling-restrained clamping plate are connected to the lower base through first bolts; and the side parts of the two layers of the buckling-restrained clamp plates are connected through a second bolt.
3. The buckling-restrained double-yield-point shear-type mild steel damper with a limiting function according to claim 2, wherein the energy-dissipating web has a first yield section;
the upper part of the first yielding section is provided with an upper connecting part for a first bolt to penetrate through;
the lower part of the first yielding section is provided with a lower connecting part for penetrating and installing a first bolt;
the width of the first yielding section gradually decreases from the upper part to the middle part and then gradually increases from the middle part to the lower part.
4. The buckling-restrained double-yield-point shear-type mild steel damper with the limiting function as claimed in claim 3, wherein the upper connecting portion and the lower connecting portion of the first yield section are both provided with circular bolt holes.
5. The buckling-restrained double-yield-point shear-type mild steel damper with a limiting function as claimed in claim 3, wherein the buckling-restrained clamp plate has a second yield section;
the upper part of the second yielding section is provided with an upper connecting part for penetrating and installing a first bolt;
the lower part of the second yielding section is provided with a lower connecting part for penetrating and installing a first bolt;
the side part of the second yielding section is provided with a side connecting part for penetrating and installing a second bolt;
the width of the second yielding section gradually decreases from the upper part to the middle part and then gradually increases from the middle part to the lower part.
6. The buckling-restrained double-yield-point shear-type mild steel damper with the limiting function according to claim 5, wherein the upper connecting portion of the second yield section is provided with an oblong bolt hole.
7. The buckling-restrained double-yield-point shear-type mild steel damper with the limiting function according to claim 5, wherein the lower connecting portion and the side connecting portion of the second yield section are both provided with circular bolt holes.
8. The buckling-restrained dual-yield-point shear-type mild steel damper with a limiting function according to claim 5, wherein the width of the first yield section is smaller than the width of the second yield section.
CN202110431543.9A 2021-04-21 2021-04-21 Anti-buckling double-yield-point shearing type mild steel damper with limiting function Pending CN113323176A (en)

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CN202110431543.9A CN113323176A (en) 2021-04-21 2021-04-21 Anti-buckling double-yield-point shearing type mild steel damper with limiting function

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Application Number Priority Date Filing Date Title
CN202110431543.9A CN113323176A (en) 2021-04-21 2021-04-21 Anti-buckling double-yield-point shearing type mild steel damper with limiting function

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113775073A (en) * 2021-09-24 2021-12-10 中衡设计集团股份有限公司 Assembled shear type damper with vertical constraint release

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113775073A (en) * 2021-09-24 2021-12-10 中衡设计集团股份有限公司 Assembled shear type damper with vertical constraint release

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