CN113389291B - Lever type self-resetting energy consumption amplification type node damper - Google Patents
Lever type self-resetting energy consumption amplification type node damper Download PDFInfo
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- CN113389291B CN113389291B CN202110626371.0A CN202110626371A CN113389291B CN 113389291 B CN113389291 B CN 113389291B CN 202110626371 A CN202110626371 A CN 202110626371A CN 113389291 B CN113389291 B CN 113389291B
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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
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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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- 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
- E04H9/023—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising rolling elements, e.g. balls, pins
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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
- E04H9/0237—Structural braces with damping devices
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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)
- Vibration Dampers (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides a lever type self-resetting energy-consumption amplification type node damper, which comprises a lever system, a resetting system and an energy consumption system, wherein the resetting system comprises a lever system, a lever system and a lever system; the lever system comprises a frame beam, a frame column, a force transmission guide rod and a deformation amplification lever; one end of the frame beam is connected with the top end of the frame column; the upper end of the deformation amplification lever is hinged with the frame column, the lower end of the deformation amplification lever is hinged with the upper end of the energy consumption system, the lower end of the energy consumption system is hinged with the frame column, the upper end of the force transmission guide rod is hinged with the frame beam, and the lower end of the force transmission guide rod is hinged with the deformation amplification lever; the lower end of the reset system is hinged with the frame column, and the upper end of the reset system is hinged with the deformation amplifying lever. Compared with the traditional node damper, the structure form is simpler, the reset system and the energy consumption system are relatively independent, the structure form and the complexity of the installation process are reduced, meanwhile, the energy absorbed by the support energy consumption system can be effectively increased through the amplification function of the deformation lever, and the position of the reset system can be adjusted according to the requirement so as to reduce the deformation of the reset system.
Description
Technical Field
The invention relates to the technical field of civil structures, in particular to a node damper, and particularly relates to a lever type self-resetting energy consumption amplification type node damper.
Background
Although casualties caused by a plurality of strong earthquakes are reduced in recent years, the aim of falling down by large earthquakes is achieved by the earthquake-proof design structure, the use function of the building is interrupted due to excessive residual deformation of the structure after the earthquake, and high maintenance cost is generated. Research shows that when the residual interlayer displacement angle after the structure earthquake exceeds 0.5%, the repair cost is higher than the reconstruction cost. The node is used as a main component of the structure, and the damage of the node is often preceded by the damage of other parts, so that the shock resistance of the node is extremely necessary to be improved. Self-reset node energy consumption devices have been studied at present, but the existing research cannot provide both reset force and energy consumption capability, and the energy consumption capability is very limited.
The conventional node damper is very limited in research, and meanwhile, the conventional node damper only has energy consumption capability and does not have resetting capability, or can be reset, but the energy consumption capability is obviously reduced;
the existing self-resetting supporting node damper is complex in structural form and low in energy consumption capacity, and cannot meet the actual anti-seismic requirement of a node.
Disclosure of Invention
According to the technical problem, a lever type self-resetting energy-consumption amplification type node damper is provided.
The technical means adopted by the invention are as follows:
a lever type self-reset energy consumption amplification type node damper comprises a lever system, a reset system and an energy consumption system;
the lever system comprises a frame beam, a frame column, a force transmission guide rod and a deformation amplification lever;
one end of the horizontally arranged frame beam is connected with the top end of the vertically arranged frame column in a hinged, rigid or semi-rigid connection mode;
the upper end of the obliquely arranged deformation amplification lever is hinged with the frame column, the lower end of the obliquely arranged deformation amplification lever is hinged with the upper end of the energy consumption system, the lower end of the energy consumption system is hinged with the frame column, and the lower end of the energy consumption system is lower than the upper end of the deformation amplification lever;
the upper end of the force transmission guide rod which is obliquely arranged is hinged with the frame beam, and the lower end of the force transmission guide rod is hinged with the deformation amplification lever;
the lower end of the resetting system is hinged with the frame column, the upper end of the resetting system is hinged with the deformation amplifying lever, and the lower end of the resetting system is positioned between the upper end of the deformation amplifying lever and the lower end of the energy consumption system;
the energy consumption system is used for absorbing energy input from the outside, and further plastic deformation between the frame beam and the frame column is avoided or reduced;
the resetting system is used for resetting the energy consumption system between the frame beam and the frame column, so that the residual deformation of the node is reduced.
Preferably, the lower end of the force transmission guide rod is located between the upper end of the resetting system and the upper end of the energy consumption system.
Preferably, the extending direction of the energy consumption system, the extending direction of the reset system and the extending direction of the force transmission guide rod are parallel and perpendicular to the extending direction of the deformation amplification lever.
Preferably, the resetting system comprises a loading shaft, two constraint side plates are arranged by taking the axis of the loading shaft as a symmetry line, one end of each constraint side plate is fixedly connected with a loading constraint end plate, the other end of each constraint side plate is fixedly connected with a fixed constraint end plate, and the two constraint side plates, the loading constraint end plate and the fixed constraint end plate enclose a cavity; one end of the loading shaft penetrates through the fixed constraint end plate and enters the cavity, shaft shoulder nuts are fixed at positions, close to one end of the loading shaft and the fixed constraint end plate, of the loading shaft, part of the loading shaft, located in the cavity and close to the fixed constraint end plate, is sleeved with two sliding blocks, each sliding block abuts against the corresponding shaft shoulder nut, a pre-tightening elastic piece is arranged between the two sliding blocks, the sliding blocks are in contact connection with the constraint side plate, and the two sliding blocks are respectively pressed against the end face of a stop processed on the constraint side plate by the pre-tightening elastic pieces;
the loading shaft is far away from one end of the loading constraint end plate is hinged to the deformation amplification lever, the loading constraint end plate is hinged to the frame column or one end of the loading shaft, far away from the loading constraint end plate, is hinged to the frame column, and the loading constraint end plate is hinged to the deformation amplification lever.
Preferably, the pre-tightening elastic element is a combination of one or more of a combined disc spring, a ring spring, a compression spring, a smart material SMA and a pre-stressing tendon, and only needs to be adjusted in form as required.
Preferably, the energy dissipation system is a combination of one or more of a friction energy dissipation system, a metal buckling-restrained brace energy dissipation system, a viscous damper, a viscoelastic damper and a metal.
The working principle is as follows: the reset system takes a combined disc spring as an example, the disc spring combination is in a compressed state no matter tension and compression loads through a sliding block and a loading control piece, and provides reset force for supporting; meanwhile, the initial pre-pressure of the reset system is set according to the yield force of the energy consumption system, so that the energy consumption system can be completely reset or partially reset, and the size of the deformation amplification lever and the design position of the hinge shaft determine the deformation amplification capacity of the energy consumption system and the deformation reduction capacity of the reset system.
Compared with the prior art, the invention has the following advantages:
1. compared with the traditional node damper, the structure form is simpler, the reset system and the energy consumption system are relatively independent, the structure form and the complexity of the installation process are reduced, meanwhile, the energy absorbed by the support energy consumption system can be effectively improved through the amplification function of the deformation lever, and the deformation of the reset system can be reduced according to the requirement;
2. the invention provides great convenience for selecting the energy consumption system and the reset system, can select the energy consumption mechanism of the energy consumption system according to the structural design requirement, can design the initial pre-pressure of the reset system according to the reset requirement, and can effectively improve the reset capability of the structure at a low displacement level and the energy consumption capability of the structure at a high displacement level.
Based on the reasons, the method can be widely popularized in the fields of node support and the like.
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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a lever-type self-resetting energy-consumption-amplifying node damper according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a resetting system according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a friction energy dissipation system according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an energy dissipation system of a metal buckling-restrained brace according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of an inner yield steel bar in the energy dissipation system of the metal buckling-restrained brace in the embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a viscous damper according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a loading steel rod of the viscous damper in the embodiment of the invention.
In the figure: 1. a frame beam; 2. a frame column; 3. a force transfer guide bar; 4. a deformation amplifying lever; 5. resetting the system; 501. a combined disc spring; 502. a shoulder nut; 503. fixing the restraint end plate; 504. the clamping jaw restrains the end plate; 505. a slider; 506. a loading shaft; 507. restraining the side plates; 6. an energy consuming system; 61. a friction energy dissipation system; 611. rubbing the inner plate; 612. rubbing the outer plate; 613. a slideway; 614. pre-tightening the bolts; 62. a metal yield prevention energy dissipation system; 621. internally bending a steel bar; 622. an outer high-strength steel pipe; 623. a radial projection; 63. a viscous damping energy dissipation system; 631. loading a steel bar; 632. a piston; 633. a damping hole; 634. and (5) coating a steel pipe externally.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1 to 7, a lever type self-resetting energy-consumption amplification type node damper comprises a frame beam 1, a frame column 2, a force transmission guide rod 3, a resetting system 5, an energy consumption system 6 and a deformation amplification lever 4;
one end of the horizontally arranged frame beam 1 is connected with the top end of the vertically arranged frame column 2;
the upper end of the obliquely arranged deformation amplification lever 4 is hinged with the frame column 2, the lower end of the obliquely arranged deformation amplification lever 4 is hinged with the upper end of the energy consumption system 6, the lower end of the energy consumption system 6 is hinged with the frame column 2, and the lower end of the energy consumption system 6 is lower than the upper end of the deformation amplification lever 4;
the upper end of the force transmission guide rod 3 which is obliquely arranged is hinged with the frame beam 1, and the lower end of the force transmission guide rod 3 is hinged with the deformation amplification lever 4;
the lower end of a resetting system 5 is hinged with the frame column 2, the upper end of the resetting system 5 is hinged with the deformation amplifying lever 4, and the lower end of the resetting system 5 is positioned between the upper end of the deformation amplifying lever 4 and the lower end of the energy consumption system 6;
the energy consumption system 6 is used for preventing the deformation between the frame beam 1 and the frame column 2;
the resetting system 5 is used for resetting the deformation between the frame beam 1 and the frame column 2.
The lower end of the force transmission guide rod 3 is positioned between the upper end of the resetting system 5 and the upper end of the energy consumption system 6.
The extending direction of the energy consumption system 6, the extending direction of the reset system 5 and the extending direction of the force transmission guide rod 3 are parallel and are perpendicular to the extending direction of the deformation amplification lever 4.
The resetting system 5 comprises a loading shaft 506, two constraint side plates 507 are arranged by taking the axis of the loading shaft 506 as a symmetrical line, one end of each constraint side plate 507 is fixedly connected with a loading constraint end plate 504, the other end of each constraint side plate 507 is fixedly connected with a fixed constraint end plate 503, and a cavity is defined by the two constraint side plates 507, the loading constraint end plates 504 and the fixed constraint end plates 503; one end of the loading shaft 506 penetrates through the fixed constraint end plate 503 and enters the cavity, a shoulder nut 502 is fixed at a position, close to the fixed constraint end plate 503, of the loading shaft 506 and a position, close to the fixed constraint end plate 503, of the loading shaft 506, two sliding blocks 505 are sleeved on a part, between the two shoulder nuts 502, of the loading shaft 506, each sliding block 505 abuts against the shoulder nut 502 close to the sliding block 505, a pre-tightening elastic piece is arranged between the two sliding blocks 505, the sliding blocks 505 are in contact connection with the constraint side plate 507, and the two sliding blocks 505 are respectively pressed against end faces of stoppers machined on the constraint side plate 507 by the pre-tightening elastic pieces;
the one end that loading axle 506 kept away from loading restraint end plate 504 with it is articulated to warp enlarged lever 4, loading restraint end plate 504 with frame post 2 is articulated or loading axle 506 keeps away from the one end of loading restraint end plate 504 is articulated with frame post 2, loading restraint end plate 504 with it is articulated to warp enlarged lever 4.
The pre-tightening elastic element is a combination of one or more of a combined disc spring 501, a ring spring, a compression spring, an intelligent material SMA and a pre-stressed tendon, and the combined disc spring 501 is adopted in the embodiment.
The energy dissipation system 6 is a combination of one or more of a friction energy dissipation system 61, a metal buckling-restrained brace energy dissipation system 62, a viscous damper 63, a viscoelastic damper and metal.
The friction energy dissipation system 61 comprises two friction outer plates 612 and a friction inner plate 611, wherein one end of the friction inner plate 611 is hinged to the frame column 2, one end of each of the two friction outer plates 612, which is far away from the frame column 2, is hinged to the deformation amplification lever 4, the friction inner plate 611 is clamped between the two friction outer plates 612, a plurality of vertically arranged slide ways 613 are arranged on the friction outer plates 612, and pre-tightening bolts 614 penetrate through the slide ways 613 and the friction inner plate 611.
The metal anti-yielding energy dissipation system 62 comprises an inner yielding steel bar 621, the upper end and the lower end of the inner yielding steel bar 621 are hinged to the frame column 2 and the deformation amplification lever 4 respectively, an outer high-strength steel pipe 622 is sleeved outside the inner yielding steel bar 621, a plurality of radial protrusions 623 are machined on the inner yielding steel bar 621, and the radial protrusions 623 are in contact connection with the inner wall of the outer high-strength steel pipe 621.
Viscous damping energy dissipation system 63 includes loading rod iron 631, piston 632, damping hole 633 and overcoat steel pipe 634, the one end of loading rod iron 633 with one of them the deformation amplification lever 4 articulates, the one end of overcoat steel pipe is articulated with frame post 2, just the loading rod iron 631 penetrates in the overcoat steel pipe 634, loading rod iron 633 is located partly in the overcoat steel pipe 634 with piston 632 fixed connection, just piston 632 with the damping of overcoat steel pipe 634 cooperates, piston 632 has a plurality ofly damping hole 633.
Of course, the energy consumption system 6 can also consume energy by a combination of the above energy consumption systems.
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 (6)
1. A lever type self-reset energy consumption amplification type node damper is characterized by comprising a lever system, a reset system and an energy consumption system;
the lever system comprises a frame beam, a frame column, a force transmission guide rod and a deformation amplification lever;
one end of the horizontally arranged frame beam is connected with the top end of the vertically arranged frame column;
the upper end of the obliquely arranged deformation amplification lever is hinged with the frame column, the lower end of the obliquely arranged deformation amplification lever is hinged with the upper end of the energy consumption system, the lower end of the energy consumption system is hinged with the frame column, and the lower end of the energy consumption system is lower than the upper end of the deformation amplification lever;
the upper end of the force transmission guide rod which is obliquely arranged is hinged with the frame beam, and the lower end of the force transmission guide rod is hinged with the deformation amplification lever;
the lower end of the resetting system is hinged with the frame column, the upper end of the resetting system is hinged with the deformation amplifying lever, and the lower end of the resetting system is positioned between the upper end of the deformation amplifying lever and the lower end of the energy consumption system;
the energy consumption system is used for absorbing energy input from the outside;
the resetting system is used for resetting the energy consumption system between the frame beam and the frame column.
2. The lever-type self-resetting power amplifying node damper as claimed in claim 1, wherein the lower end of the force transmission guide rod is located between the upper end of the resetting system and the upper end of the power consuming system.
3. A lever-type self-resetting power amplifying node damper as claimed in claim 1 or 2, wherein the extending direction of the power consuming system, the extending direction of the resetting system and the extending direction of the force transmission guide rod are parallel and perpendicular to the extending direction of the deformation amplifying lever.
4. The lever type self-resetting energy-consumption-amplifying node damper as claimed in claim 1, wherein the resetting system comprises a loading shaft, two constraining side plates are arranged with the axis of the loading shaft as a symmetry line, one end of each of the two constraining side plates is fixedly connected with a loading constraining end plate, the other end of each of the two constraining side plates is fixedly connected with a fixed constraining end plate, and the two constraining side plates, the loading constraining end plate and the fixed constraining end plate define a cavity; one end of the loading shaft penetrates through the fixed constraint end plate and enters the cavity, shaft shoulder nuts are fixed at the positions, close to one end of the loading constraint end plate and the fixed constraint end plate, of the loading shaft, two sliding blocks are sleeved on the part, located between the two shaft shoulder nuts, of the loading shaft, each sliding block abuts against the corresponding shaft shoulder nut, a pre-tightening elastic piece is arranged between the two sliding blocks, the sliding blocks are in contact connection with the constraint side plate, and the two sliding blocks are respectively pressed against the end face of a stop catch machined on the constraint side plate by the pre-tightening elastic pieces;
the loading shaft is far away from one end of the loading constraint end plate is hinged to the deformation amplification lever, the loading constraint end plate is hinged to the frame column or one end of the loading shaft, far away from the loading constraint end plate, is hinged to the frame column, and the loading constraint end plate is hinged to the deformation amplification lever.
5. The lever-type self-resetting energy-dissipating amplified node damper as claimed in claim 4, wherein the pre-tightening elastic member is one or more of a combination disc spring, a ring spring, a compression spring, an SMA (shape memory alloy) and a pre-stressed tendon.
6. The lever-type self-resetting energy-dissipating amplified node damper as claimed in claim 1, wherein the energy dissipating system is a combination of one or more of a friction energy dissipating system, a metal buckling restrained brace energy dissipating system, a viscous damper, a viscoelastic damper and a metal.
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| CN202110626371.0A CN113389291B (en) | 2021-06-04 | 2021-06-04 | Lever type self-resetting energy consumption amplification type node damper |
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| CN113756461B (en) * | 2021-08-20 | 2023-06-02 | 北京工业大学 | Base angle damper with displacement amplifying function and assembled shear wall with swing energy consumption function |
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| CN113389291A (en) | 2021-09-14 |
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