KR101564362B1 - Hybrid Damping Device for Mitigation of Building Vibration - Google Patents

Abstract

The present invention relates to a complex damping device capable of absorbing and damping earthquake energy and the like by operating to correspond to various levels of transverse loads by separating initial rigidity and yield strength and controlling the same using a disc spring and a friction bolt, and of restoring residual displacement due to yield of the friction bolt by being combined with lead bearing rubber. The complex damping device comprises: a first housing comprising a first upper board, a first lower board, and a front board; a second housing comprising a second upper board, a second lower board, and a rear board; a first damping unit comprising a bolt connected to and passing through a through hole of the front board of the first housing to be able to reciprocate, a disc spring fastened to the outer circumference of the bolt in the front and the rear of the front board, respectively, and a pair of nuts fastened to the bolt to be connected to the disc spring on the outer surface of the disc spring; and a second damping unit comprising a friction pad, the friction bolt, and the nut. The friction pad is installed between the first upper board and the second upper board and a first lower board and the second lower board, respectively and has a bolt hole penetrating the friction pad at a position corresponding to the bolt hole of the first upper board and the first lower board. The friction bolt and the nut penetrate into and are fastened to the fist upper board, the second upper board, and the friction pad and the first lower board, the second lower board, and the friction pad, respectively. One of the bolt holes on the first upper board and the second upper board and one of the bolt holes on the first lower board and the second lower board are a long hole.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hybrid damping device,

In the present invention, the initial stiffness and the yield strength are separated and adjusted by using the disk spring and the friction bolt, so that the stiffness and energy can be absorbed and attenuated by the stepwise operation of various lateral loads, The present invention relates to a composite damping device capable of restoring the residual displacement due to yielding of the composite damping device.

Recently, the construction of high-rise buildings, long-span bridges, various power plants, and other large structures have been increasing, and the frequency of typhoons and earthquakes has increased, and interest in the safety and usability of the structures is increasing.

Especially, earthquake is one of the biggest damages among various natural disasters. As the frequency of occurrence increases and the area in which the earthquake occurs spreads, there is a growing concern about earthquake disasters. In addition, the damage caused by typhoons is soaring that it is necessary to prevent the deterioration of usability of various structural and non-structural elements due to excessive horizontal displacement caused by wind loads.

On the other hand, metal breakdown type damping devices, friction damping devices, lead-inserted rubber damping devices, and the like have been used in the domestic and overseas seismic retrofit technologies.

The double metal yielding damping system dissipates the energy applied to the structure by using the elasticity and yielding plastic behavior of the steel during deformation of the structure. However, there is a disadvantage that the damping device undergoes permanent deformation after the breakage due to an external force such as an earthquake, and further maintenance is required accordingly. In addition, the damping device stays in the elastic region until a predetermined earthquake energy intensity is reached. If the design is made in accordance with the strong earthquake, the energy absorption force is small when a wind load or a weak point is generated, leading to a partial destruction of the structure.

The friction damping device dissipates the energy applied to the structure by using the friction generated on the friction surface during deformation of the structure. This is because there is no change in the yielding load after yielding and it is possible to dissipate more energy than the other damping devices at the same yield strength. However, there is a disadvantage that after the yielding, residual displacement occurs and additional maintenance is required. When the earthquake energy is designed for earthquake, it does not have the effect of earthquake energy damping and it causes partial destruction of the structure.

In addition, the lead-inserted rubber damping device is a structure in which lead padding is inserted at the center of the laminated rubber, which combines the elastic behavior of the lead padding before yielding and the restoring force of the laminated rubber after the yielding. Previous studies are insufficient.

The conventional damping device as described above is developed in a single material and a shape. Since the yield strength and the initial stiffness are changed in the same way, the degree of freedom in designing the damping device is greatly reduced.

Therefore, it is necessary to study the composite type damping device which can selectively design according to necessity by separating the control of the yield strength and the initial stiffness so as to complement the performance of the existing damping device and to have the damping ability against various seismic loads and wind loads Do.

Accordingly, a technique for a multi-stage reciprocating friction damper (Patent Application No. 10-2011-0022652) has been proposed, which can operate step by step according to the intensity of seismic energy to absorb seismic energy of various strengths.

However, in the case of the above technology, there is a disadvantage that the structure is complicated and residual displacement occurs after the yielding and still requires additional maintenance

The present invention is to provide a composite damping device capable of stable energy absorption and attenuation by making it possible to cope with the disadvantages of the existing damping device step by step according to the seismic load or the strength of the wind load.

The present invention provides a composite damping device that can be easily manufactured and installed with a simple structure, and maintenance is not required due to the occurrence of residual displacement, thereby facilitating maintenance.

According to a preferred embodiment of the present invention, there is provided a method of manufacturing a bolt hole, comprising: a first upper plate member having a plurality of bolt holes penetrating therethrough; a first lower plate member spaced apart from the first upper plate member by a predetermined distance, A first housing formed of a front plate member having a through hole formed by interconnecting the front surfaces of the first bottom plate members; A second upper plate disposed at one side of the first upper plate and having a bolt hole penetrating the bolt hole at a position corresponding to the bolt hole of the first upper plate and a second upper plate positioned at one side of the first lower plate, A second lower plate member having a bolt hole formed at a position corresponding to the bolt hole and a rear plate member interconnecting the rear surfaces of the second upper plate member and the second lower plate member; A disk spring coupled to the outer circumferential surface of the bolt at the front and rear of the front plate member, and a bolt fixed to the outer circumference of the disk spring so as to be in tight contact with the disk spring, A first attenuating portion formed of a pair of nuts coupled to the first damper; And a friction plate which is provided between the first and second upper plate members and between the first and second lower plate members and between the first and second upper plate members and the first and second lower plate members, A second damping portion formed of a friction bolt and a nut which are inserted into the first upper plate member, the second upper plate member, the friction pad and the first lower plate member, the second lower plate member and the friction pad, respectively, Wherein any one of the bolt holes of the first and second upper plate members and the bolt hole of the first and second lower plate members is an elongated hole.

According to another preferred embodiment of the present invention, the bolt hole of the friction pad is a long hole.

According to another preferred embodiment of the present invention, the first housing further comprises a first side plate for connecting one side of the first top plate and one side of the first bottom plate, and the second housing includes a second top plate and a second And a second side plate for connecting the other side surface of the lower plate to the second side plate, wherein a third attenuator is provided between the first side plate and the second side plate, to provide.

According to another preferred embodiment of the present invention, the second housing comprises an upper housing and a lower housing separated from each other by a rear plate member and a second side plate member, And the two side plate members are coupled to each other.

According to another preferred embodiment of the present invention, the second upper plate is provided on the first upper plate and the second lower plate is provided on the lower part of the first lower plate.

According to another preferred embodiment of the present invention, the friction pad is adhered to one of the first and second upper plate members and the first and second bottom plate members with an adhesive. Lt; / RTI >

According to another preferred embodiment of the present invention, the surface to which the friction pad is adhered with an adhesive is knurled.

The present invention has the following effects.

First, it compensates for the disadvantages of the existing damping device, and it is possible to respond step by step according to the seismic load or the intensity of the wind load, so that stable energy absorption and attenuation are possible.

Second, since the initial stiffness can be controlled by using the disk spring, the hysteresis behavior of the damping device occurs from the time of small deformation, thereby dissipating more energy.

Third, it is possible to control the yield strength using the number of friction bolts and tightening force by connecting friction bolts and nuts in series to disk springs. Therefore, the control range of the yield strength can be broadened by a simple method.

Fourth, since the residual displacement can be restored by using the lead-insertion rubber, there is no need to maintain the plastic deformation, fracture, and residual displacement of the material against external force.

Fifth, it can be applied both to seismic design of new structure and seismic reinforcement of existing structure, and its application range is wide.

1 is a schematic view of a composite damping device of the present invention.
2 is a perspective view showing an embodiment of a composite damping device of the present invention.
3 is a sectional view showing an embodiment of the composite damping device of the present invention.
4 is a sectional view showing a first attenuator coupled to a front plate member;
5 is an exploded perspective view showing a coupling relationship between the first housing and the first damping portion;
6 is an exploded perspective view showing a composite damping device according to an embodiment;
7 is an exploded perspective view showing a composite damping device according to another embodiment;
8 is a perspective view showing an embodiment of a composite damping device of the present invention provided with a third attenuation portion;
9 is an exploded perspective view showing still another embodiment of the composite damping device of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

FIG. 1 is a schematic view of a composite damping device of the present invention, FIG. 2 is a perspective view showing an embodiment of the composite damping device of the present invention, and FIG. 3 is a sectional view showing an embodiment of the composite damping device of the present invention.

And FIG. 4 is a cross-sectional view showing a first attenuator coupled to the front plate, and FIG. 5 is an exploded perspective view showing a coupling relationship between the first housing and the first attenuator.

The composite damping device of the present invention includes a first upper plate member 11 having a plurality of bolt holes H formed therein and a plurality of bolt holes H disposed below the first upper plate member 11, And a front plate member 13 having a through hole 15 formed by interconnecting the front surface of the first upper plate member 11 and the front surface of the first lower plate member 12, A housing (10); A second upper plate member 21 located at one side of the first upper plate member 11 and having a bolt hole H formed in a position corresponding to the bolt hole H of the first upper plate member 11, A second lower plate member 22 which is located at one side of the first lower plate member 12 and in which a bolt hole H penetrates at a position corresponding to the bolt hole H of the first lower plate member 12, 2 a second housing 20 composed of a rear plate member 23 interconnecting the top plate member 21 and the rear side of the second bottom plate member 22; A bolt 31 which is reciprocably coupled to the through hole 15 of the front plate member 13 of the first housing 10 so as to be reciprocated, And a pair of nuts 33 coupled to the bolts 31 so as to be in tight contact with the disc springs 32 at the outer sides of the disc springs 32. The first damping portions 30, ; And the first upper plate 11 and the second upper plate 21 and between the first lower plate 12 and the second lower plate 22, A friction pad 41 having a bolt hole H formed at a position corresponding to the bolt hole H of the lower plate member 12 and a friction pad 41 formed of the first upper plate 11, A second damping portion 40 composed of a friction bolt 42 and a nut 43 which are respectively in contact with the first lower plate member 12 and the second lower plate member 22 and the friction pad 41, ); And one of the bolt holes H of the first upper plate 11 and the second upper plate 21 and the bolt hole H of the first lower plate 12 and the second lower plate 22, Is a long hole (S).

1, the composite damping device of the present invention includes a first damping portion 30 and a second damping portion 40 connected in series, a disk spring 32 as a first damping portion 30, The initial stiffness is controlled by the elastoplastic behavior of the second damping portion 40 and the tightening force and the number of the second damping portion 40 are controlled to control the yield strength.

Therefore, it can be applied to both deformation due to various loads, from small deformation due to wind loads to large deformation due to earthquake loads, etc., so that energy absorption and attenuation by external force are possible.

The first housing 10 and the second housing 20 form the outer frame of the composite damping device of the present invention.

The second housing 20 may be coupled to the outside or inside of the first housing 10.

Of course, it is also possible that the first and second housings 10 and 20 are mutually staggered, but they are preferably coupled to each other outward or inward to coincide with the axis on which the load acts.

The left and right open spaces when the first and second housings 10 and 20 are coupled can be used as a work space for assembling and inserting the first and second dampers 30 and 40.

The first housing 10 includes a first upper plate 11, a first lower plate 12 and a front plate 13. The first upper plate 11 and the first lower plate 12 are provided with a bolt hole A plurality of through holes 15 are formed in the front plate 13 so that the first damping portions 30 are coupled.

The second housing 20 includes a second upper plate member 21, a second lower plate member 22 and a rear plate member 23. The second upper plate member 21 and the second lower plate member 22, A plurality of holes (H) are formed.

The bolt hole H of the first and second upper plate members 11 and 21 and the bolt hole H of the first and second lower plate members 12 and 22 are formed at positions corresponding to each other, Either one of the bolt holes H of the two upper plate members 11 and 21 and one of the bolt holes H of the first and second lower plate members 12 and 22 is constituted by the elongated hole S, , So that the relative displacement of the two housings (10, 20) can be absorbed and behaved.

2 to 5, the first damping portion 30 includes a bolt 31 (see FIG. 2) that is inserted into the through hole 15 of the front plate member 13 of the first housing 10 so as to reciprocate A disc spring 32 coupled to the outer circumferential surface of the bolt 31 on the front and rear sides of the front plate member 13 and a bolt 31 to be tightly engaged with the disc spring 32 on the outer side of the disc spring 32, And a pair of nuts 33 that are coupled to each other.

The disc spring 32 determines a time point at which the damping device moves with respect to the lateral force, and the initial stiffness of the composite damping device is controlled by the elasto-plastic behavior of the disc spring 32.

As shown in FIG. 4, the disc springs 32 form a predetermined inclined surface with respect to the center of the disc, and the disc is pressed against the external force to absorb seismic energy.

Stiffness and displacement can be freely adjusted through various serial or parallel combinations of the disc springs 32, and thus designing with the required initial rigidity is possible.

The disk spring 32 and the bolt 31 are disposed on the front and rear surfaces of the front plate member 13, respectively.

2 to 3 and 6 to 7, the second attenuator 40 is disposed between the first upper plate 11 and the second upper plate 21 and the first lower plate 12 And a bolt hole H is formed at a position corresponding to the bolt hole H of the first upper plate 11 and the first lower plate 12 The frictional pad 41 and the friction plate 41 and the first and second lower plate members 22 and 22 and the first and second upper plate members 11 and 21 and the friction pad 41 and the first and second lower plate members 12 and 22, A friction bolt 42 and a nut 43 which are in close contact with each other and are in close contact with each other.

The second damping portion 40 is a portion for adjusting the yield strength of the composite damping device, and the yield strength can be adjusted by the tightening force and the number of the friction bolts 42. Therefore, it is easy to control the separation of the yield strength separately from the initial stiffness.

That is, until the composite damping device reaches the yield strength, only the first damping portion 30 operates, and the second damping portion 40 does not cause displacement. After reaching the yield strength, the energy is dissipated by the frictional force of the second damping portion 40. In this case, the displacement remains after the external force is generated. Such displacement can be compensated for by the combination of the disc spring 32 and the lead-insertion rubber 51 described later.

The friction pad 41 is installed between the first and second upper plate members 11 and 21 and between the first and second lower plate members 12 and 22 to increase frictional force. Therefore, the displacement resistance due to the frictional force can be increased.

When both surfaces of the friction pad 41 are separated from the first and second upper plate members 11 and 21 and the first and second lower plate members 12 and 22, friction occurs on both sides of the friction pad 41 It is difficult for stable energy dissipation to occur due to the complicated behavior, so that one surface of the friction pad 41 is preferably fixed to the plate member.

The friction pad 41 is bonded to either the first upper plate 11 or the second upper plate 21 and the first lower plate 12 and the second lower plate 22 with an adhesive .

That is, the friction pad 41 is fixed to either one of the first and second upper plate members 11 and 21, and friction movement occurs only on the other side of the friction pad 41, so that a clear and stable friction behavior can be expected. This is the same for the first and second lower plate members 12 and 22. [

Further, the surface to which the friction pad 41 is adhered with an adhesive may be knurled so as not to cause slippage by increasing the adhesive force.

2, the through holes formed in the front end of the first damping portion 30 and the plurality of coupling holes formed in the rear plate member 23 of the second housing 20 are connection holes for bolt-fastening both ends of the composite damping device to the structure . Of course, the composite damping device may be welded to the structure.

As described above, in the present invention, the initial stiffness and the yield strength of the damping device are separated from each other so that they can be selectively designed as needed.

In other words, the disc spring 32 and the friction bolt 42 are connected in series to adjust the initial stiffness through the disc spring 32. The yield strength is controlled by the number and tightening force of the friction bolts 42, The strength was separated and adjusted.

Thus, by stagedly acting on lateral loads of various sizes, energy can be absorbed and attenuated effectively.

FIG. 6 is an exploded perspective view showing a composite damping device according to an embodiment, and FIG. 7 is an exploded perspective view showing a composite damping device according to another embodiment.

6 to 7, the bolt hole H of the friction pad 41 may be formed as a long hole S. As shown in FIG.

The frictional pad 41 has a large brittleness so that it is likely to be broken if it is used only by the diameter of the friction bolt 42. [ The bolt hole H of the friction pad 41 is formed as a long hole S so that the force of the friction bolt 42 is not transmitted directly to the friction pad 41 to protect the friction pad 41.

In addition, in order to prevent the frictional bolt 42 from being released and the frictional force of the frictional bolt 42 to be reduced when the frictional force is repeated, the frictional force of the frictional bolt 42 can be maintained by tightening the disc spring with the frictional bolt 42.

6, the bolt holes H of the first upper plate 11 and the first lower plate 12 of the first housing 10 are elongated, and in the embodiment of FIG. 7, the second housing 20, And the bolt hole (H) of the second upper plate member (21) and the second lower plate member (22) are formed as elongated holes.

It is possible to position the elongated hole S in any one of the first and second upper plate members 11 and 21 and the first and second lower plate members 12 and 22. In order to prevent eccentricity between the upper plate member and the lower plate member, It is preferable to form the slot S at positions as symmetrical as possible as in the embodiment of Fig.

8 is a perspective view showing an embodiment of a composite damping device of the present invention provided with a third attenuation portion.

8, the first housing 10 further includes a first side plate 14 connecting one side of the first top plate 11 and one side of the first bottom plate 12, The housing 20 further includes a second side plate 24 connecting the second top plate 21 and the other side of the second bottom plate 22 and the second side plate 24 between the first side plate and the second side plate A third damping portion 50 may be provided to which the lead insertion rubber 51 is coupled.

As shown in FIGS. 1 and 8, the lead insertion rubber 51 is connected in parallel with the friction bolt 42 to increase the damping of the damping device, and after the external force such as an earthquake acts, And restoring the displacement.

The lead insertion rubber 51 is joined to the bolts 52 with the first and second side plate members 14 and 24.

The first side plate member 14 and the second side plate member 24 serve as stiffeners for the first housing 10 and the second housing 20. The first and second side plate members 14, The first lower plate member 12 and the second lower plate member 22 are bonded to each other while ensuring sufficient rigidity.

The first side plate member 14 and the second side plate member 24 may be formed at positions symmetrical to each other so as to be positioned on one side of the first housing 10 and the other side of the second housing 20, respectively.

At this time, the open space formed in the other side of the first housing 10 and the other side of the second housing 20 allows the operator to assemble the bolt located inside the complex damping device or utilize it as a work space for maintenance, etc. .

9 is an exploded perspective view showing still another embodiment of the composite damping device of the present invention.

9, the second housing 20 includes an upper housing 20a and a lower housing 20b separated from each other by a rear plate 23 and a second side plate 24, The second housing 20a and the lower housing 20b may be configured such that the second side plate 24 is coupled to the side of the lead insertion rubber 51, respectively.

At this time, the second upper plate member 21 may be provided on the first upper plate member 11, and the second lower plate member 22 may be provided on the lower portion of the first lower plate member 12.

When the second housing 20 is divided into the upper housing 20a and the lower housing 20b and the second housing 20 is coupled to the outer side of the first housing 10, The second housing 20 can be easily coupled.

10: first housing 11: first upper plate member
12: first bottom plate member 13: front plate member
14: first side plate member 15: through-hole
20: second housing 20a: upper housing
20b: lower housing 21: second upper plate member
22: second bottom plate member 23: rear plate member
24: second side plate member 30: first attenuation portion
31: bolt 32: disk spring
33: nut 40: second attenuator
41: Friction pad 42: Friction bolt
43: nut 50: third attenuator
51: lead insertion rubber 52: bolt
B: Bolt H: Bolt hole
S: Slots

Claims (7)

A first upper plate member 11 formed with a plurality of bolt holes H through which a plurality of bolt holes H are inserted and a first lower plate member And a front plate 13 having a through hole 15 connecting the front surfaces of the first upper plate 11 and the first lower plate 12 to each other.
A second upper plate member 21 located at one side of the first upper plate member 11 and having a bolt hole H formed in a position corresponding to the bolt hole H of the first upper plate member 11, A second lower plate member 22 which is located at one side of the first lower plate member 12 and in which a bolt hole H penetrates at a position corresponding to the bolt hole H of the first lower plate member 12, 2 a second housing 20 composed of a rear plate member 23 interconnecting the top plate member 21 and the rear side of the second bottom plate member 22;
A bolt 31 which is reciprocably coupled to the through hole 15 of the front plate member 13 of the first housing 10 so as to be capable of reciprocating movement and a front plate member 13 which is coupled to the outer circumferential surface of the bolt 31 before and after the front plate member 13, And a pair of nuts 33 coupled to the bolts 31 so as to be in tight contact with the disc springs 32 at the outer sides of the disc springs 32. The first damping portions 30, ; And
The first upper plate 11 and the second lower plate 22 are disposed between the first upper plate 11 and the second upper plate 21 and between the first lower plate 12 and the second lower plate 22, A friction pad 41 having a bolt hole H formed at a position corresponding to the bolt hole H of the plate member 12 and a friction pad 41 having the first upper plate 11, And a second damping portion 40 constituted by a friction bolt 42 and a nut 43 that are in close contact with the first lower plate member 12 and the second lower plate member 22 and the friction pad 41, ; Respectively,
Any one of the bolt hole H of the first upper plate 11 and the bolt hole H of the second upper plate 21 and the bolt hole H of the first lower plate 12 and the second lower plate 22 Is a long hole (S).
The method of claim 1,
Wherein the bolt holes (H) of the friction pad (41) are elongated holes (S).
The method of claim 1,
The first housing 10 further includes a first side plate 14 connecting the first top plate 11 and one side of the first bottom plate 12,
The second housing 20 further includes a second side plate 24 connecting the second top plate 21 and the other side of the second bottom plate 22,
Wherein a third damping portion (50) is provided between the first side plate and the second side plate, the lead damping rubber (51) being coupled with the third damping portion (50).
4. The method of claim 3,
The second housing 20 includes an upper housing 20a and a lower housing 20b separated from each other by a rear plate member 23 and a second side plate member 24,
Wherein the upper housing (20a) and the lower housing (20b) are respectively coupled to the side surfaces of the lead-insertion rubber (51) by a second side plate (24).
5. The method of claim 4,
Characterized in that the second upper plate member (21) is provided on the first upper plate member (11) and the second lower plate member (22) is provided on the lower part of the first lower plate member (12).
The method of claim 1,
The friction pad 41 may be attached to any one of the first and second upper plate members 11 and 21 and the first and second lower plate members 12 and 22 with an adhesive Characterized by a composite damping device.
The method of claim 6,
Wherein a surface to which the friction pad (41) is adhered with an adhesive is knurled.

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