CN113338468A - Double-stage shearing damper and design method thereof - Google Patents
Double-stage shearing damper and design method thereof Download PDFInfo
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- CN113338468A CN113338468A CN202110758604.2A CN202110758604A CN113338468A CN 113338468 A CN113338468 A CN 113338468A CN 202110758604 A CN202110758604 A CN 202110758604A CN 113338468 A CN113338468 A CN 113338468A
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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
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Abstract
The invention discloses a double-stage shearing damper and a design method with the same, wherein the double-stage shearing damper comprises: the first energy consumption unit and the second energy consumption unit. The second power consumption unit is established ties with first power consumption unit in axial direction, and axial direction is the length direction of two-stage shearing type attenuator, and the second power consumption unit includes: the second core plate, the outer cover plate, the viscoelastic material layer and the axial limiting part are arranged on at least one side of the second core plate in the thickness direction, the viscoelastic material layer is arranged between the second core plate and the outer cover plate, the axial limiting part is connected with the second core plate and is perpendicular to the outer cover plate to axially limit the second energy dissipation unit, and the shearing limiting parts are located on two sides of the outer cover plate in the width direction and are spaced from the outer cover plate to limit the deformation range of the second energy dissipation unit. According to the double-stage shearing damper, the two energy consumption units are switched under different deformation conditions through the shearing limiting piece, the performance is stable, and the deformation capacity is high.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a double-stage shearing damper and a design method of the double-stage shearing damper.
Background
In the related art, the effect of dissipating seismic energy and reducing the response of the structure can be achieved by installing the shear-type damper at a proper position in a frame or shear wall structure. However, the traditional shearing damper only has one yield point, and a floor with large deformation enters the yield point firstly under the action of an earthquake, so that the deformation is concentrated, a weak layer is formed, and the deformation capacity and the collapse resistance of the structure are greatly reduced. On the other hand, under the action of small earthquake, the damper usually does not enter plasticity, the structural damping is difficult to increase, and the structural acceleration response is controlled, so that under the action of small earthquake, the acceleration response is too large especially for a shear wall structure, acceleration sensitivity non-structural components are seriously damaged, and the quick recovery of the functions of the building after the earthquake is difficult to realize.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to provide a dual stage shear-type damper, which has corresponding energy dissipation capability and additional damping effect under different deformation conditions.
Another objective of the present invention is to provide a design method of a dual stage shear-type damper.
The dual stage shear-type damper according to an embodiment of the present invention includes: the damper comprises a first energy consumption unit and a second energy consumption unit, wherein the second energy consumption unit is connected with the first energy consumption unit in series in the axial direction, the axial direction is the length direction of the double-stage shearing damper, and the second energy consumption unit comprises: the outer cover plate is arranged on at least one side of the second core plate in the thickness direction; the viscoelastic material layer is arranged between the second core plate and the outer cover plate; the axial limiting piece is connected with the second core plate and is perpendicular to the outer cover plate so as to axially limit the second energy consumption unit; and the shearing limiting parts are positioned on two sides of the outer cover plate in the width direction and are spaced from the outer cover plate to limit the deformation range of the second energy consumption unit.
According to the dual-stage shearing damper provided by the embodiment of the invention, the second energy consumption unit is connected with the first energy consumption unit in a series connection mode, the axial limiting piece can ensure the axial tensile capacity of the connecting beam, and the shearing limiting piece can limit the deformation range of the viscoelastic energy consumption unit. Thereby, the hysteresis effect of the two-stage shear type damper is realized. The double-stage shearing damper is applied to a frame or shear wall structure, the second energy consumption unit consumes energy under small deformation, and the first energy consumption unit consumes energy under large deformation, so that the structural deformation mode can be effectively controlled, and the seismic response of the structure is reduced.
In addition, the dual stage shear-type damper according to the above embodiment of the present invention has the following additional technical features:
in some embodiments of the present invention, the second energy consuming unit is disposed on at least one side of the first energy consuming unit along the axial direction, or the second energy consuming unit is disposed in the first energy consuming unit.
In some embodiments of the invention, the viscoelastic material layer is adhesively connected to the second core plate and the outer cover plate, respectively.
In some embodiments of the present invention, the viscoelastic material layer is a high damping material layer, and both ends of the viscoelastic material layer in the axial direction do not exceed the outer cover plate.
In some embodiments of the present invention, the outer cover plate is formed with a fitting groove provided through the outer cover plate in the thickness direction, and the axial stopper is welded to the second core plate and is movable at the fitting groove.
In some embodiments of the present invention, the second core plate includes at least one, and when the second core plate includes a plurality of second core plates, the viscoelastic material layer is disposed between two adjacent second core plates, and the second energy dissipation unit further includes: and the second connecting plate is arranged on one side of the second energy consumption unit along the axial direction and is connected with the outer cover plate.
In some embodiments of the invention, the first dissipative unit is a metal dissipative unit or a friction dissipative unit, the first dissipative unit comprising: the first core plate is connected with the second core plate in a welding mode; the stiffening rib is arranged on at least one side of the first core plate along the thickness direction; the flanges are arranged on the edge of at least one side of the first core plate in the width direction and are connected with the stiffening ribs; and the first connecting plate is respectively connected with the first core plate and the flange.
In some embodiments of the invention, the shear limiter comprises a limiting plate, and the limiting plate is welded to the flange; or the limiting plate and the flange are integrated structural parts.
In some embodiments of the present invention, the dual stage shear-type damper is configured in a structure symmetrical in a thickness direction.
The invention also provides a design method of the double-stage shearing damper with the embodiment.
According to the design method of the embodiment of the second aspect of the present invention, the simplified mechanical model of the dual-stage shear-type damper and the hysteresis curve under the reciprocating load are designed, and the stiffness K1, K2, K3 of each stage of the dual-stage shear-type damper and the damper output corresponding to each stage can be obtained from the following formulas (1) to (5):
F1＝δstK1 (3)
F2＝δstK1+K2(δse-δst) (4)
F3＝δstK1+K2(δse-δst)+K3(δsd-δse) (5)
kve is the equivalent stiffness of the second energy consumption unit, Ksy is the elastic stiffness of the first energy consumption unit, Ksyy is the secondary stiffness of the first energy consumption unit, δ st is the allowable deformation range of the second energy consumption unit, namely the design displacement of the structure under the action of frequent earthquakes is considered, Kst is the elastic stiffness of the shear limiting part, δ se is the deformation amount corresponding to the yielding of the first energy consumption unit, and δ sd is the design displacement of the damper under the action of rare earthquakes considered.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a perspective view of a first configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 2 is an elevation view of a first configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 3 is a top view of a first configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 4 is a side view of a first configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 5 is a first angled perspective view of a second configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 6 is a second angled perspective view of a second configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 7 is a third angular perspective view of a second configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 8 is an elevation view of a second configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 9 is a top view of a second configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 10 is a side view of a second configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 11 is an angled perspective view of a third configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 12 is another angular perspective view of a third configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 13 is an elevation view of a third configuration of a dual stage shear-type damper according to an embodiment of the present invention.
FIG. 14 is a top view of a third configuration of a dual stage shear-type damper, according to an embodiment of the present invention.
FIG. 15 is a side view of a third configuration of a dual stage shear-type damper, according to an embodiment of the present invention.
FIG. 16 is an elevation view of a fourth configuration of a dual stage shear-type damper, according to an embodiment of the present invention.
Fig. 17 is a schematic view of a dual stage shear-type damper according to an embodiment of the present invention installed on a coupled shear wall.
Fig. 18 is a schematic view of a dual stage shear-type damper according to an embodiment of the present invention mounted on a frame.
Fig. 19 is a simplified mechanical model diagram of a two-stage shear-type damper constructed in a method of designing a two-stage shear-type damper according to an embodiment of the present invention.
Fig. 20 is a graph showing hysteresis curves of the dual stage shear-type damper under reciprocating loads in the method of designing the dual stage shear-type damper of fig. 19 in accordance with the embodiment of the present invention.
Reference numerals:
a two-stage shear type damper 100,
The first energy consumption unit 101, the first core plate 1, the stiffening rib 2, the flange 3, the shear limiting part 4, the limiting plate 41, the first connecting plate 11,
A second energy consumption unit 102, a second core plate 6, a viscoelastic material layer 7, an outer cover plate 8, an axial limiting piece 9, a matching groove 10, a second connecting plate 5,
Coupled shear wall 12, frame 13.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.
A dual stage shear-type damper 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.
The dual stage shear-type damper 100 according to the embodiment of the first aspect of the present invention includes: a first energy consuming unit 101 and a second energy consuming unit 102. Here, the first dissipative unit 101 may be, for example, a metal dissipative unit or a friction dissipative unit, and the first dissipative unit 101 may be, for example, a metal yielding or a friction damper; the second energy consuming unit 102 may be a viscoelastic energy consuming unit.
Specifically, the second dissipative unit 102 is connected in series with the first dissipative unit 101 in an axial direction, which is the longitudinal direction of the dual stage shear-type damper 100 (e.g., the direction a1 shown in fig. 1). The second energy consuming unit 102 and the first energy consuming unit 101 may be connected by welding, and the series connection of the second energy consuming unit 102 and the first energy consuming unit 101 may be understood as the series connection of forces after the connection.
The second energy consuming unit 102 includes: the second core plate 6, the outer cover plate 8, the viscoelastic material layer 7, the axial limiting piece 9 and the shear limiting piece 4. Specifically, the outer cover plate 8 is provided on at least one side of the second core plate 6 in the thickness direction; the thickness direction may refer to the a3 direction shown in fig. 1. In some embodiments, the outer cover plate 8 may be provided on one side of the second core plate 6 in the thickness direction; in some embodiments, the outer cover plates 8 may be respectively disposed on both sides of the second core plate 6 in the thickness direction, and the like, and in this case, the outer cover plates 8 may be respectively disposed on both sides of the second core plate 6 and spaced apart from the second core plate 6 with the second core plate 6 as a symmetry plane.
The viscoelastic material layer 7 is arranged between the second core plate 6 and the outer cover plate 8; the layer 7 of viscoelastic material can be connected to the second core plate 6 and the outer cover plate 8, respectively. The axial limiting member 9 is connected to the second core plate 6, and the axial limiting member 9 may be disposed perpendicular to the outer cover plate 8, so that the second energy consuming unit 102 may be axially limited by the axial limiting member 9.
The shear stoppers 4 are located on both sides of the outer cover 8 in the width direction (e.g., a2 direction shown in fig. 1), and the shear stoppers 4 may be spaced apart from the outer cover 8, so that the deformation range of the second energy consuming unit 102 may be limited by the shear stoppers 4.
For example, in the a2 direction shown in fig. 1, the shear limiter 4 is not in contact with the outer lid plate 8, but is disposed at a predetermined distance from the outer lid plate 8. The shear limiting member 4 limits the shear deformation of the second energy consuming unit 102 (e.g., viscoelastic energy consuming unit) within a certain range, and if the shear deformation exceeds the certain range, the shear limiting member 4 will act to transmit the deformation to the first energy consuming unit 101 (e.g., metal energy consuming unit).
The viscoelastic energy dissipation material layer 7, the axial limiting piece 9, the second core plate 6 and the shearing limiting piece 4 are used as stress components of the viscoelastic energy dissipation unit. According to the energy-saving device, the second energy-consuming unit 102 (such as a viscoelastic energy-consuming unit) is connected with the first energy-consuming unit 101 (such as a metal energy-consuming unit or a friction energy-consuming unit) in a series connection mode, the axial limiting part 9 can ensure the axial tensile and pressure resistance of the connecting beam, and the shear limiting part 4 can limit the deformation range of the viscoelastic energy-consuming unit. This configuration achieves the hysteresis effect of the two-stage shear-type damper 100. The double-stage shearing damper 100 is applied to a frame 13 or a shear wall structure, energy consumption of the viscoelastic energy dissipation unit is achieved under small deformation, energy consumption of the metal energy dissipation unit or energy consumption of the friction energy dissipation unit is achieved under large deformation, and therefore the structural deformation mode is effectively controlled, and structural seismic response is reduced.
The dual-stage shear damper 100 according to the embodiment of the invention has corresponding energy consumption capability and additional damping effect under different deformation conditions. Under the action of small shock, the viscoelastic energy consumption unit consumes energy firstly, adds damping, reduces the structural acceleration response and protects the non-structural component. Under the action of large shock, the structural deformation is increased, and at the moment, the metal energy consumption unit enters plasticity, so that the energy consumption capacity is stronger. And under different deformations, different energy consumption units of the damper are excited to consume energy.
According to the dual-stage shearing damper 100 of the embodiment of the invention, the second energy consumption unit 102 is connected with the first energy consumption unit 101 in series, the axial limiting part 9 can ensure the axial tensile capacity of the connecting beam, and the shearing limiting part 4 can limit the deformation range of the viscoelastic energy consumption unit. Thereby, the hysteresis effect of the two-stage shear type damper 100 is achieved. The double-stage shearing damper 100 is applied to a frame 13 or a shear wall structure, the second energy consumption unit 102 consumes energy under small deformation, and the first energy consumption unit 101 consumes energy under large deformation, so that the structural deformation mode can be effectively controlled, and the structural seismic response is reduced.
The dual-stage shearing damper 100 according to the embodiment of the invention has the advantages of stable performance, high rigidity, high deformation capability, high energy consumption capability, simple structure and the like.
According to some embodiments of the present invention, the second energy consuming unit 102 is disposed on at least one side of the first energy consuming unit 101 along the axial direction, or the second energy consuming unit 102 is disposed in the first energy consuming unit 101. That is to say, the dual-stage shearing damper 100 in the present application includes various embodiments, and the viscoelastic energy dissipating unit may be independently disposed on one side of the dual-stage shearing damper, or disposed on both sides or the middle of the dual-stage shearing damper, so as to exert the dual-stage energy dissipating effect.
Specifically, in some embodiments, referring to fig. 1 to 4, the second energy consuming unit 102 may be disposed on one side of the first energy consuming unit 101 along the axial direction (e.g., on the left or right side of the direction a 1); in some embodiments, referring to fig. 5 to 10, the second energy consuming units 102 may be respectively disposed at both sides of the first energy consuming unit 101 in the axial direction (e.g., left and right sides of the direction a 1). Of course, in some embodiments, referring to fig. 11 to 15, the second energy consuming unit 102 may also be disposed in the first energy consuming unit 101. The relative positions of the second energy consuming unit 102 and the first energy consuming unit 101 can be adaptively set according to actual needs.
According to some embodiments of the invention, the layer of viscoelastic material 7 is adhesively connected to the second core plate 6 and to the outer cover plate 8, respectively. The viscoelastic material layer 7 and the second core plate 6 can be connected in a bonding mode, and the viscoelastic material layer 7 and the outer cover plate 8 can also be connected in a bonding mode. The connection between the viscoelastic material layer 7 and the second core plate 6 and the outer cover plate 8 is convenient to realize through a bonding mode, and the operation is convenient.
Further, the viscoelastic material layer 7 is a high damping material layer, and both ends of the viscoelastic material layer 7 in the axial direction do not exceed the outer cover plate 8. For example, the viscoelastic material layer 7 may be, for example, a rubber member, and the like, and in this application, the viscoelastic material is made of a high damping material, so that the deformation range of the second energy consuming unit 102 is large, the viscoelasticity is strong, and the damping performance of the second energy consuming unit 102 is improved.
Both ends of the viscoelastic material layer 7 in the direction a1 shown in fig. 1 do not extend beyond the outer cover plate 8, and the area of the viscoelastic material layer 7 may be smaller than the smaller area of the outer cover plate 8 and the second core plate 6, for example, the viscoelastic material layer 7 is placed between the second core plate 6 and the outer cover plate 8 and is completely covered by the outer cover plate 8, so that the outer cover plate 8 plays a role of protecting the viscoelastic material layer 7 during the movement of the viscoelastic material layer 7 in the width direction (the up-down direction shown in fig. 1).
According to some embodiments of the present invention, the outer cover plate 8 is formed with a fitting groove 10 provided through the outer cover plate 8 in the thickness direction (the up-down direction shown in fig. 1), and the axial stopper 9 is weld-connected to the second core plate 6 and movable at the fitting groove 10. For example, the outer cover plate 8 may be provided with a fitting groove 10, the fitting groove 10 may be provided through the outer cover plate 8 in the thickness direction of the outer cover plate 8, the layer 7 of viscoelastic material may be provided with a through hole corresponding to the fitting groove 10, the axial stopper 9 may be welded to the second core plate 6 on the left side in the length direction (the left side in the a1 direction shown in fig. 1), and the axial stopper 9 may be movable at the fitting groove 10 through the through hole. The axial limiting member 9 may be a pin structure, and the axial limiting member 9 and the viscoelastic material layer 7 may be formed into a T-shaped structure (see fig. 9), so that the axial deformation of the viscoelastic energy dissipating unit can be limited by connecting the axial limiting member 9 with the pin groove of the outer cover plate 8 of the viscoelastic energy dissipating unit.
According to the dual-stage shearing damper 100 of the embodiment of the invention, in a small deformation state, the second energy consumption unit 102 consumes energy, the outer cover plate 8 drives the viscoelastic material layer 7 to rock, the second core plate 6 moves along with the viscoelastic material layer 7, and the axial limiting piece 9 is welded with the second core plate 6 and can move at the matching groove 10, so that the axial limiting piece 9 rocks within a small range in the matching groove 10, the rocking amplitude of the second core plate 6 can be reduced, and the damping effect can be achieved.
According to some embodiments of the present invention, the second core plate 6 includes at least one, and when the second core plate 6 includes a plurality of second core plates 6, the viscoelastic material layer 7 is disposed between two adjacent second core plates 6, and the second dissipative unit 102 further includes: and the second connecting plate 5 is arranged on one side of the second energy consumption unit 102 along the axial direction, and the second connecting plate 5 is connected with the outer cover plate 8. For example, the second connection plate 5 may be provided at one side of the second energy consuming unit 102 in the axial direction, and the second connection plate 5 may be connected to the outer cap plate 8. The assembly connection between the two-stage shear type damper 100 and a wall surface or the like is facilitated by the second connecting plate 5. Here, the second connecting plate 5 is fixed to the wall surface by welding a conventional embedded plate or replacing a bolt.
In some embodiments, there may be one or more second core plates 6. When the number of the second core plates 6 is one, the second core plates 6 are disposed between the viscoelastic material layer 7 and the outer cover plate 8, when the number of the second core plates 6 is multiple, the viscoelastic material layer 7 is disposed between two adjacent second core plates 6, the number of the viscoelastic material layers 7 is increased with the increase of the number of the second core plates 6, each second core plate 6 is disposed on the inner side of the outer cover plate 8 along the thickness direction (direction a3 in fig. 1), the number of the second core plates 6 is increased, and the bearing capacity of the second energy consumption unit 102 is correspondingly increased.
In some embodiments, one end of the second connecting plate 5 in the axial direction is connected to the second connecting plate 5, and the other end is connected to the building, and the connection mode can be a bolt connection, so that the assembly is simple, and the quick replacement is convenient.
The projections of the first energy consumption unit 101 and the second energy consumption unit 102 on the plane of the second connecting plate 5 are located on the inner side of the second connecting plate 5, so that the stress area can be increased, the pressure on the surface of the pressed object per unit area is small, the surface of a building connected with the second connecting plate 5 is not easy to damage, and the structure of the dual-stage shearing damper 100 tends to be stable.
Referring to fig. 1, according to some embodiments of the present invention, the first energy consuming unit 101 includes: a first core plate 1, a stiffener 2, a flange 3, and a first connecting plate 11.
Specifically, the first core plate 1 is connected with the second core plate 6 in a welding manner; the stiffening ribs 2 are arranged on at least one side of the first core plate 1 along the A3 direction; the flange 3 is provided on at least one side edge of the first core plate 1 in the a2 direction, and the flange 3 is connected to the stiffener 2; the first connection plate 11 is connected to the first core plate 1 and the flange 3, respectively.
For example, the stiffener 2 may be provided on one side or both sides of the first core 1 in the a3 direction; the flange 3 is provided at an edge of one side or both sides of the first core plate 1 in the a2 direction, and the first connecting plate 11 may be provided at least one side of the first core plate 1 in the axial direction. The first core plates 1, the stiffening ribs 2, and the flanges 3 are stress components of the metal energy dissipation units, optionally, the number of the second core plates 6 may be one or more, the first energy dissipation units 101 and the second energy dissipation units 102 are in a one-to-one correspondence relationship at the joints, the first energy dissipation units 101 are in the above-mentioned assembly relationship, and fig. 16 further illustrates a schematic structural diagram of the dual-stage shear damper 100 when the first energy dissipation units 101 are friction energy dissipation units.
The connected mode of stiffening rib 2 and first core plate 1 is the welding, prescribes a limit to the deformation space between each stiffening rib 2, provides the space of warping and replying for the range of rocking of first core plate 1 simultaneously, makes first core plate 1 take place the difficult fracture of deformation in-process, and the deformation range of two-stage shear type attenuator 100 in width direction has been prescribed a limit to in the setting of edge of a wing 3, plays the reinforced effect. The flange 3 is connected with the first core plate 1, so that the deformation degree of the first core plate 1 in the thickness direction can be limited, and the phenomenon of fracture caused by overlarge bending angle of the first core plate 1 in the thickness direction is avoided. The flange 3 is connected with the stiffening rib 2, plays a reinforcing role for the stiffening rib 2 deforms in the left-right direction, avoids the phenomenon that the stiffening rib 2 falls off from the first core plate 1, can prevent the stiffening rib 2 from shaking in the left-right direction, and limits the deformation range of the stiffening rib 2.
The dual-stage shear damper 100 according to the embodiment of the invention has corresponding energy consumption capability and additional damping effect under different deformation conditions. Under the action of small shock, the viscoelastic energy consumption unit consumes energy firstly, adds damping, reduces the structural acceleration response and protects the non-structural component. Under the action of large shock, the structural deformation is increased, and at the moment, the metal energy consumption unit enters plasticity, so that the energy consumption capacity is stronger. And under different deformations, different energy consumption units of the damper are excited to consume energy.
Further, the shearing limiting part 4 comprises a limiting plate 41, and the limiting plate 41 is connected with the flange 3 in a welding mode; alternatively, the limiting plate 41 and the flange 3 are an integral structure. In short, the shear stop 4 and the flange 3 in the present application may be separate or integral pieces. For example, in some embodiments, the shear limiting member 4 may include a limiting plate 41, and the limiting plate 41 is welded to the flange 3; in some embodiments, it is also possible that the shear limiting member 4 includes a limiting plate 41, and the limiting plate 41 is an integral structural member with the flange 3.
In some embodiments, the limiting plate 41 is disposed on at least one side of the second dissipative unit 102 in the width direction, and the second dissipative unit 102 is spaced apart from the limiting plate 41, so as to define a deformation space for the second dissipative unit 102, and the limiting plate 41 has the characteristics of strong rigidity, large deformation capability, and the like. Limiting plate 41 and edge of a wing 3 can link to each other for the welding or integral type structure, reach the purpose that limiting plate 41 and edge of a wing 3 link to each other, the stress point of dispersible limiting plate 41, limiting plate 41 can effectively control second power consumption unit 102 and consume energy in little deformation range, when taking place great deformation, surpass the limit value of second power consumption unit 102, can embody through limiting plate 41, limiting plate 41 can be through this characteristic of linking to each other with edge of a wing 3, transmit the power of the big deformation of receiving for first power consumption unit 101, make first power consumption unit 101 consume energy under the big deformation degree.
According to the dual-stage shearing damper 100 of the embodiment of the invention, the shearing limiting member 4 does not limit the shearing deformation of the viscoelastic energy dissipating unit within a certain range, and when the shearing deformation exceeds a certain range, the shearing deformation of the viscoelastic energy dissipating unit is limited by the limiting plate 41, and the deformation is transmitted to the metal energy dissipating unit or the friction energy dissipating unit.
The dual-stage shearing damper 100 according to the embodiment of the invention has the advantages of simple structure and convenience in processing, can be industrially produced, and can realize the quick recovery function after earthquake while greatly improving the earthquake-resistant performance of the structure and reducing the structural damage.
In some embodiments of the present invention, the dual stage shear-type damper 100 is constructed in a structure symmetrical in the a3 direction. The first energy consumption unit 101 takes the first core plate 1 as a symmetrical plane, the second energy consumption unit 102 takes the second core plate 6 as a symmetrical plane, and the double-stage shearing damper 100 is constructed into a symmetrical structure, so that the double-stage shearing damper 100 is uniformly stressed and uniformly shaken in the shaking process, and better shock insulation and absorption effects are achieved.
Fig. 17 shows a schematic view of a dual stage shear-type damper 100 according to an embodiment of the present invention mounted on a coupled shear wall 12. Fig. 18 shows a schematic view of a two-stage shear-type damper 100 according to an embodiment of the present invention mounted on a frame 13. The dual-stage shearing damper 100 and the wall (or the frame 13) may be connected by conventional pre-embedded plate welding or replaceable bolt connection. Under the action of an earthquake, the frame 13 and the shear wall structure deform, and the dual-stage shear damper 100 can function.
According to the dual-stage shearing damper 100 of the embodiment of the invention, through an innovative structure, particularly, the viscoelastic energy dissipation unit is connected in series with the metal energy dissipation unit or the friction energy dissipation unit, so that the defect that the traditional shearing damper only has one yield point and can not dissipate energy under a small earthquake is overcome. When the structure deforms under the action of an earthquake, the viscoelastic energy consumption unit is firstly excited to consume energy, so that the damping ratio is effectively added, and the response of the structure is controlled. When the structural deformation develops to be within the limit value of the viscoelastic energy consumption unit, the shearing limiting part 4 is excited, so that the metal energy consumption unit or the friction energy consumption unit enters a working state, and a larger energy consumption capacity is provided. Therefore, the effects of controlling the structural acceleration and displacement response under small vibration and effectively homogenizing the structural interlayer deformation under large vibration are achieved.
The dual stage shear-type damper 100 according to the embodiment of the present invention has the following advantages: firstly, the earthquake can be quickly replaced. The traditional concrete coupling beam is sheared and damaged under the earthquake, and is difficult to repair after the earthquake, and the dual-stage shearing damper 100 disclosed by the invention can realize quick replacement after the earthquake by connecting through an assembly structure. The assembling herein means that the dual stage shear type damper 100 can be assembled to a wall or the like. Secondly, the industrial production efficiency is high. The dual stage shear-type damper 100 is simple in construction and cost-controllable. Thirdly, the performance of the two stages is obvious. The two-stage shear type damper 100 is connected in series with a metal yielding or friction energy dissipation unit through a viscoelastic energy dissipation unit, and the two-stage rigidity can realize effective design. Fourthly, the control effect is good. The method can effectively coordinate the overall deformation of the structure to be uniform and provide considerable additional damping ratio under small earthquake, thereby controlling the acceleration response of the structure and ensuring the damage of non-structural members under small earthquake.
Referring to fig. 19 and 20, a method of designing a dual stage shear-type damper 100 according to an embodiment of the second aspect of the present invention includes: designing a simplified mechanical model of the dual-stage shearing damper 100 and a hysteresis curve under the action of reciprocating loads, the stiffness K of each stage of the dual-stage shearing damper 1001,K2,K3And the damper output corresponding to each stage can be obtained by the following formulas (1) to (5):
F1＝δstK1 (3)
F2＝δstK1+K2(δse-δst) (4)
F3＝δstK1+K2(δse-δst)+K3(δsd-δse) (5)
wherein, KveIs the equivalent stiffness, K, of the second dissipative element 102 (e.g. viscoelastic dissipative element)syIs the elastic stiffness, K, of the first dissipative element 101 (e.g. a metal yielding element)syyIs the secondary stiffness, δ, of the first dissipative element 101 (e.g. a metal yielding element)stFor the allowable deformation range of the second dissipative element 102 (e.g. viscoelastic dissipative element), i.e. taking into account the design displacement of the structure under the effect of frequent earthquakes, KstFor the elastic stiffness of the shear limiters 4, deltaseA deformation, δ, corresponding to the yielding of the first energy dissipating unit 101 (e.g. a metal yielding energy dissipating unit)sdThe damper is designed to move under the influence of rarely encountered earthquakes in consideration of the structure.
The double-stage shearing damper 100 designed by the design method of the double-stage shearing damper 100 overcomes the defect that the traditional shearing damper only has one yield point and cannot dissipate energy under small earthquakes by an innovative structure, particularly by connecting the viscoelastic energy dissipation unit with the metal energy dissipation unit or the friction energy dissipation unit in series. When the structure deforms under the action of an earthquake, the viscoelastic energy consumption unit is firstly excited to consume energy, so that the damping ratio is effectively added, and the response of the structure is controlled. When the structural deformation develops to be within the limit value of the viscoelastic energy consumption unit, the shearing limiting part 4 is excited, so that the metal energy consumption unit or the friction energy consumption unit enters a working state, and a larger energy consumption capacity is provided. Therefore, the effects of controlling the structural acceleration and displacement response under small vibration and effectively homogenizing the structural interlayer deformation under large vibration are achieved.
Other constructions and operations of the dual stage shear-type damper 100 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A dual stage shear-type damper, comprising:
a first energy consuming unit;
a second energy dissipating unit connected in series with the first energy dissipating unit in an axial direction, the axial direction being a length direction of the dual stage shear-type damper, the second energy dissipating unit comprising:
a second core board;
the outer cover plate is arranged on at least one side of the second core plate in the thickness direction;
the viscoelastic material layer is arranged between the second core plate and the outer cover plate;
the axial limiting piece is connected with the second core plate and is perpendicular to the outer cover plate so as to axially limit the second energy consumption unit;
and the shearing limiting parts are positioned on two sides of the outer cover plate in the width direction and are spaced from the outer cover plate to limit the deformation range of the second energy consumption unit.
2. The dual stage shear-type damper of claim 1, wherein the second dissipative unit is disposed on at least one side of the first dissipative unit in the axial direction, or wherein the second dissipative unit is disposed within the first dissipative unit.
3. A dual stage shear-type damper according to claim 1, wherein said layer of viscoelastic material is adhesively bonded to said second core plate and said outer cover plate, respectively.
4. A dual stage shear-type damper according to claim 3, wherein said layer of viscoelastic material is a layer of high damping material, neither end of said layer of viscoelastic material in the axial direction extending beyond said outer cover plate.
5. The dual stage shear-type damper according to claim 1, wherein said outer cover plate is formed with a fitting groove provided through said outer cover plate in the thickness direction, and said axial retainer is welded to said second core plate and is movable at said fitting groove.
6. The dual stage shear-type damper of claim 1, wherein said second core plates comprise at least one, and when said second core plates comprise a plurality, said layer of viscoelastic material is disposed between two adjacent second core plates, and the second dissipative unit further comprises: and the second connecting plate is arranged on one side of the second energy consumption unit along the axial direction and is connected with the outer cover plate.
7. A dual stage shear-type damper according to any one of claims 1-6, wherein said first dissipative unit is a metallic dissipative unit or a frictional dissipative unit, said first dissipative unit comprising:
the first core plate is connected with the second core plate in a welding mode;
the stiffening rib is arranged on at least one side of the first core plate along the thickness direction;
the flanges are arranged on the edge of at least one side of the first core plate in the width direction and are connected with the stiffening ribs;
and the first connecting plate is respectively connected with the first core plate and the flange.
8. The dual stage shear-type damper of claim 7, wherein said shear limiter comprises a limiting plate, said limiting plate being welded to said flange; or the limiting plate and the flange are integrated structural parts.
9. The dual stage shear-type damper of claim 7, wherein the dual stage shear-type damper is configured in a structure that is symmetrical in the thickness direction.
10. A method of designing a dual stage shear-type damper according to any one of claims 1-9, comprising: designing a simplified mechanical model of the dual-stage shearing damper and a hysteresis curve under the action of reciprocating load, so that the rigidity K of each stage of the dual-stage shearing damper1,K2,K3And the damper output corresponding to each stage can be obtained by the following formulas (1) to (5):
F1＝δstK1 (3)
F2＝δstK1+K2(δse-δst) (4)
F3＝δstK1+K2(δse-δst)+K3(δsd-δse) (5)
kve is the equivalent stiffness of the second energy consumption unit, Ksy is the elastic stiffness of the first energy consumption unit, Ksyy is the secondary stiffness of the first energy consumption unit, δ st is the allowable deformation range of the second energy consumption unit, namely the design displacement of the structure under the action of frequent earthquakes is considered, Kst is the elastic stiffness of the shear limiting part, δ se is the deformation amount corresponding to the yielding of the first energy consumption unit, and δ sd is the design displacement of the damper under the action of rare earthquakes considered.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387489A (en) * | 2022-08-23 | 2022-11-25 | 震安科技股份有限公司 | Multi-order multi-type combination metal damper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387489A (en) * | 2022-08-23 | 2022-11-25 | 震安科技股份有限公司 | Multi-order multi-type combination metal damper |
| CN115387489B (en) * | 2022-08-23 | 2024-01-02 | 震安科技股份有限公司 | Multi-order multi-type combined metal damper |
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