JP4282199B2 - Damping damper device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration damper device, and more particularly, in the field of civil engineering, architecture, and mechanical structures, vibration suppression of structures that vibrate under dynamic loads such as earthquakes, typhoons, machines, and traffic vibrations. The present invention relates to a damper device.
[0002]
[Prior art]
Conventionally, as this type of damping damper device, a hydraulic damper, a viscoelastic damper, a steel damper, a lead damper, and the like are known. Moreover, as a thing using laminated rubber, the seismic isolation apparatus by leaded laminated rubber and high damping laminated rubber is known.
[0003]
This seismic isolation device using lead-containing laminated rubber and high-damping laminated rubber is installed at the foundation of the building, supports the weight of the superstructure, and suppresses the vibration of the building by shearing horizontally in the event of an earthquake. . That is, the lead plug or the high damping rubber incorporated in the laminated rubber absorbs vibration energy and dissipates as heat due to shear deformation. Such a seismic isolation device has a large vibration energy absorption effect and has a lot of construction results as an effective device.
[0004]
However, when these seismic isolation devices are used as they are as damping dampers for buildings, there are the following problems.
(1) In the case of a seismic isolation device, since a large vertical load from the upper part constrains the device itself, the stability of the shape in the height direction of the device is high, and stability of performance against repeated shear deformation Is expensive.
However, when this seismic isolation device is used as a vibration control device on a wall surface of a building, it is difficult to obtain a large restraining force as described above. Therefore, the deformation proceeds in the height direction of the device. In particular, when a lead plug is used, since the binding force to lead is weakened, lead is not deformed, and the desired attenuation effect cannot be obtained.
[0005]
(2) If the structure is deformed unexpectedly and the safety device is not attached, the device itself will follow the deformation and break. As a result, the safety of the structure is lowered, and the importance of checking the device when deformation occurs is also increased.
(3) Normally, if the vibration control device of a building is placed within the beam width (200 to 300 mm) of the building, the effective floor area of the building is not reduced, and it is advantageous in terms of economy. The top is also preferred. Therefore, it is often a problem to increase the shape of the device by attaching a complicated accessory device.
[0006]
(4) The upper wall surface of the building undergoes deformation in the orthogonal direction to the wall surface in addition to in-plane deformation during an earthquake or the like. Therefore, since the apparatus is simultaneously subjected to in-plane and out-of-plane shear deformation and bending deformation, it is necessary to follow these deformations.
(8) In the case of laminated rubber, in the direction perpendicular to the rubber layer, the allowable compressive force is high, but the allowable tensile force is small and the reliability is lacking. Therefore, it is desirable to keep the tensile force applied to the laminated rubber to a minimum.
[0007]
[Problems to be solved by the invention]
The present invention has been made based on the technical background as described above, and achieves the following object.
An object of the present invention is to provide a vibration damper device that can solve various problems when a conventional seismic isolation device is used for vibration control.
[0008]
[Means for Solving the Problems]
The present invention employs the following means in order to achieve the above object.
That is, the present invention includes a cylindrical body fixed to one structure,
A bonding plate that is fixed to the other structure and extends into the cylindrical body, and is relatively displaceable in the axial direction between the cylindrical body;
Columnar rubber for absorbing vibration energy fixed between the surface of the joining plate and the inner surface of the cylindrical body, the axis of which is substantially orthogonal to each surface of the joining plate and the cylindrical body and a disposed columnar rubber to,
The columnar rubber has a central hard plate at a central portion in the axial direction thereof, and is fitted in a hole provided in the joining plate in the central hard plate portion .
[0009]
The columnar rubber is made of laminated rubber obtained by alternately laminating rubber layers and hard plates, and a lead plug is enclosed inside along the axial direction. The columnar rubber may be composed of a high damping rubber. The columnar rubber has a central hard plate at the center in the axial direction, and is fitted into a hole provided in the joining plate in the central hard plate portion. The vibration damper device of the present invention can also be incorporated into an unbonded brace material known as a buckling material for buckling prevention. In this case, the tubular body and the joining plate are respectively a steel pipe and a brace core of the unbonded brace material. Consists of steel plates.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. 3 is an enlarged sectional view taken along the line BB in FIG. The vibration damper 1 device according to the present invention includes a cylindrical body 3 fixed to the lower structure 2, a joining plate 5 fixed to the upper structure 4, and a laminated rubber containing lead plugs incorporated in the cylindrical body 3. 6 is provided.
[0011]
The cylindrical body 3 is made of a steel pipe having a rectangular cross section in this embodiment. A mounting plate 9 is fixed to the base plate 7 of the lower structure 2 by a joining bolt 8, and the cylindrical body 3 is fixed to the upper surface of the mounting plate 9 by welding. A mounting plate 12 is also fixed to the base plate 10 of the upper structure 4 by a bonding bolt 11, and the upper end of the bonding plate 5 is fixed to the mounting plate 12 by welding.
[0012]
The lower end of the joining plate 5 extends into the cylindrical body 3, and a gap of a predetermined size is formed between both side ends of the joining plate 5 and the inner side surface of the tubular body 3 and between the lower end and the mounting plate 9. C ₁ and C ₂ (see FIG. 2) are formed.
[0013]
The laminated rubber 6 has a cylindrical shape, and is formed by alternately laminating hard plates and rubber layers 16 each consisting of thick both-side steel plates 13 and 13, a central steel plate 14 and a thin intermediate steel plate 15. The lead plug 17 is enclosed along the axial direction. The laminated rubber 6 is fitted in a hole 18 formed in the joining plate 5 at the central steel plate 14 portion, and both side steel plates 13 and 13 are fixed to the inner surface of the cylindrical body 3 by a joining bolt 19. That is, the laminated rubber 6 is disposed so that the axis thereof is orthogonal to each surface of the joining plate 5 and the cylindrical body 3. The joining plate 5 and the central steel plate 14 are fixed with a locking bolt 20.
[0014]
The vibration damper device operates as follows. When the structure vibrates due to an earthquake or the like, displacement occurs between the lower structure 2 and the upper structure 4, and when the joining plate 5 is displaced in the axial direction between the tubular body 3, the laminated rubber 6 undergoes shear deformation in the vertical and horizontal directions within the same plane. Along with the shear deformation, the lead plug 17 is plastically deformed to absorb vibration energy and quickly attenuate the vibration.
[0015]
The lead plug 17 enclosed in the laminated rubber 6 is for absorbing vibration energy and damping vibration as described above. High damping rubber can also be used as the rubber material of the laminated rubber 6. In this case, since the rubber itself exhibits a damping effect, the lead plug does not necessarily have to be sealed. In this case, the intermediate steel plate 15 having a lead plug restraining function can also be omitted.
[0016]
According to the vibration damper device, the following effects can be obtained.
(1) Since the laminated rubber 6 is built into the cylindrical body 3, the cylindrical body 3 is restrained from being deformed by being pulled in the axial direction of the laminated rubber 6 (the height direction when used in a seismic isolation device). . Therefore, stable performance can be ensured for both the laminated rubber with lead plugs and the high damping rubber.
[0017]
(2) The gaps C ₁ and C ₂ between the cylindrical body 3 and the joining plate 5 are the operating range of the apparatus. Therefore, when the structure undergoes unexpected large deformation, the joining plate 5 comes into contact with the cylindrical body 3 and displacement is restricted, and the deformation of the laminated rubber 6 stops. The external force beyond this is transmitted as it is from the upper structure 4 to the lower structure 2, and the safety of the structure is ensured.
[0018]
(3) By arranging the laminated rubber 6 so that its axis is in the horizontal direction, the apparatus width can be reduced. During a Level 2 earthquake, the structure may be deformed by about 1/150 to 1/200 of the floor height. For example, when the floor height is 350 cm, the interlayer displacement is 1.75 to 2.3 cm. Therefore, if the deformation at level 2 of the laminated rubber is set to 100 to 150%, the total thickness of the rubber required for one side of the joining plate 5 is about 2.3 cm (= 2.3 / 1), and the steel plates 13, 14, 15 and the like Even if the thickness is added, it can be kept within 10cm. Further, by providing a thick central steel plate 14 at the central portion of the laminated rubber and fitting it to the joining plate 5, the thickness of the device can be further reduced.
[0019]
(4) The in-plane deformation of the structure can be followed up, down, left and right by deformation of the laminated rubber 6. Therefore, no tensile force is generated on the laminated rubber 6 even when it is subjected to in-plane bending. When the device is subjected to out-of-plane deformation, the cylindrical body 3 bears an external force. As a result, the out-of-plane deformation is absorbed by the deformation of the joining plate 5 and the upper and lower structures 2, 4, and no large deformation occurs in the laminated rubber portion. Therefore, the laminated rubber portion can be prevented from being damaged.
(5) With a simple mechanism, deformation of the laminated rubber in the axial direction (height direction) can be constrained, and the stability of the apparatus can be enhanced, and the cost is excellent.
[0020]
4 and 5 are front views showing application examples of the above-described vibration damper device, and the vibration damper device 1 is applied to a wall surface constituted by a structural column 21 and beams 22a and 22b. . In the example shown in FIG. 5, the damping damper device 1 is installed between the studs 23 and 23 (upper structure and lower structure) provided in the middle part of the upper and lower beams 22a and 22b. In the example shown in FIG. 5, the vibration damper device 1 is installed between the upper beam 22a and the brace 25 from the lower beam 22b.
[0021]
In each of the above application examples, when the upper and lower beams 22a and 22b are horizontally displaced, the laminated rubber 6 undergoes shear deformation, and the lead plug 17 yields and exhibits a damping effect. This shear deformation of the laminated rubber also corresponds to the vertical deformation and out-of-plane deformation between the beams. When the deformation further progresses, the joining plate 5 of the apparatus is restrained by the cylindrical body 3 and the deformation stops, and the proof strength of the upper and lower studs 23 or the braces 25 is exhibited. That is, the vibration control effect by the lead plug 17 can be expected at the time of medium and small deformation, and the earthquake resistance effect by the studs 23 or the braces 25 at the time of large deformation.
[0022]
The vibration damper device according to the present invention can be incorporated into a buckling-restrained unbonded brace material known as a structural element that resists horizontal force such as seismic force or wind force. 6 and below show the embodiment, FIG. 6 is an axial sectional view, FIG. 7 is a sectional view taken along the line CC in FIG. 6, FIG. 8 is an enlarged sectional view taken along the line DD in FIG. It is the EE line expanded sectional view of FIG.
[0023]
In the unbonded brace material 30, a brace core steel plate 32 is disposed in a steel pipe 31 having a rectangular cross section, and a filling mortar 33 is filled between the brace core steel plate 32 and the steel pipe 31. An unbonded material (adhesion prevention material) 34 is coated on the brace core steel plate 32 in the steel pipe 31, and the brace core steel plate 32 is freely affected by the steel pipe 31 and the filling mortar 33 that are buckling preventing members in the axial direction. As a result, the unbonded brace material 30 functions as an earthquake-resistant member.
[0024]
In this embodiment, each of the steel pipe 31 and the brace core steel plate 32 is used as a cylindrical body and a joining plate as referred to in the present invention. It is a thing. In this embodiment, the laminated rubber 6 is a quadrangular prism and is disposed on one end side of the steel pipe 31. The thick upper and lower steel plates 35, 35 of the laminated rubber 6 are respectively fixed to the steel pipe 31 and the brace core steel plate 32 by the joining bolts 36.
[0025]
On the other end side of the steel pipe 31, the brace core steel plate 32 is integrated with the filling mortar 33 via the stud 37. Instead of the filling mortar 33, foam material 38 is filled on both sides in the axial direction of the brace core steel plate 32 in the laminated rubber 6 (may be simply a gap). Thereby, when the brace core steel plate 32 is deformed in the axial direction, the laminated rubber 6 can be shear-deformed accordingly.
[0026]
FIG. 10 is an example in which the unbonded brace material 30 incorporating the vibration damper device 1 is applied to a wall surface constituted by a structural column 21 and beams 22a and 22b. When the structure receives seismic force or wind force and causes interlayer deformation, the brace core steel plate 32 expands and contracts by receiving axial force. That is, the brace core steel plate 32 has no energy absorption effect while in the elastic range of the steel material. Therefore, when the yield strength is set to be greater than or equal to the external force received by the structure at the time of the level 2 earthquake, the energy absorption effect of the brace core steel plate 32 cannot be expected at an earthquake or wind external force below that level.
[0027]
On the other hand, according to the above embodiment, the laminated rubber 6 undergoes shear deformation according to the amount of expansion / contraction as the brace core steel material 32 expands / contracts, and the lead plug 17 built in the laminated rubber 6 is provided. Plastically deforms and absorbs energy. The lead plug 17 has an energy absorption effect even in a relatively small shear deformation, and even when subjected to the shear deformation, the lead plug 17 can ensure its quality and durability by recrystallization in the case of high purity lead.
[0028]
Therefore, by combining the brace core steel material 32 and the lead plug 17, vibration energy is absorbed by the lead plug 17 built in the laminated rubber 6 to suppress the vibration of the structure against typhoons and small earthquakes. Can do. On the other hand, at the time of a large earthquake, the brace core steel material 32 having a large allowable proof stress yields to absorb vibration energy. In this way, a composite damping damper using a highly reliable steel material and a lead plug with good damping performance can be obtained.
[0029]
Also in this embodiment, it is possible to use a high-attenuation rubber or a high-attenuation laminated rubber instead of the laminated rubber containing lead plugs. In both the above-described embodiments, it is preferable to use a lead plug restrained by a coil spring as proposed by the applicant in Japanese Patent Application Laid-Open No. 10-176308 because the durability is improved.
[0030]
The above embodiment is merely an example, and various modifications can be made to the present invention. For example, in the above-described embodiment, the structure is such that one laminated rubber 6 is fitted into the hole 18 provided in the joining plate 5, but one laminated rubber is disposed on each side of the joining plate 5 without fitting. It is good also as a structure. However, from the viewpoint of making the apparatus compact, it is preferable to employ the structure shown in the above embodiment as described above. Further, the shape of the laminated rubber is not limited to the columnar shape or the quadrangular prism shape, but may be other polygonal column shapes.
[0031]
【The invention's effect】
As described above, according to the present invention, the columnar rubber for absorbing vibration energy is built in the cylindrical body, and the structure is constrained by the cylindrical body while allowing the shear deformation, and thus stable. A damping effect can be obtained, and safety can be ensured.
[Brief description of the drawings]
FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
FIG. 3 is an enlarged sectional view taken along line BB in FIG. 2;
FIG. 4 is a front view showing an application example of the vibration damper device according to the present invention.
FIG. 5 is a front view showing another application example.
FIG. 6 is a cross-sectional view showing an embodiment in which the vibration damper device according to the present invention is incorporated in a buckling-restrained unbonded brace material.
FIG. 7 is a cross-sectional view taken along the line CC of FIG.
8 is an enlarged sectional view taken along line DD of FIG.
FIG. 9 is an enlarged cross-sectional view taken along line EE of FIG.
FIG. 10 is a front view showing an application example of an unbonded brace material incorporating a vibration damper device.
[Explanation of symbols]
1: Damping damper device 2: Lower structure 3: Cylindrical body 4: Upper structure 5: Joining plate 6: Laminated rubber 13: Both side steel plates 14: Central steel plate 15: Intermediate steel plate 16: Rubber layer 17: Lead plug 18 :hole

Claims (3)

A cylindrical body fixed to one structure;
A bonding plate that is fixed to the other structure and extends into the cylindrical body, and is relatively displaceable in the axial direction between the cylindrical body;
Columnar rubber for absorbing vibration energy fixed between the surface of the joining plate and the inner surface of the cylindrical body, the axis of which is substantially orthogonal to each surface of the joining plate and the cylindrical body and a disposed columnar rubber to,
The said columnar rubber has a center hard plate in the center part of the axial direction, and is fitted in the hole provided in the said joint plate in this center hard plate part, The damping damper apparatus characterized by the above-mentioned . 2. The damping damper according to claim 1, wherein the columnar rubber is made of laminated rubber obtained by alternately laminating rubber layers and hard plates, and a lead plug is enclosed inside along the axial direction. apparatus. 2. The vibration damper device according to claim 1, wherein the columnar rubber is made of high damping rubber.

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