JP2000266113A - Base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation device free to miniaturize by efficiently absorbing vibrational energy by sliding between a resin layer and a plate. SOLUTION: A base isolation device is constituted by accumulating a resin layer 10 made of urethane, etc., and plates 8, 9, 11 having smooth sliding surfaces 8b, 9b, 22b to make contact with this resin layer 10, and it is devised to absorb displacement force by sliding between the plates 8, 9 on which displacement force from a side pole and a floor 2a as structural materials of a building and the resin layer 10 making contact with these plates 8, 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration control device applied to a building such as a building or a bridge.

[0002]

2. Description of the Related Art For example, various types of vibration control devices, such as those using an oil damper and those using a laminated rubber, have been provided as vibration damping devices for suppressing the shaking of a building due to an earthquake, a strong wind or the like. The laminated rubber type vibration damping device converts the vibration energy of a building caused by an earthquake into elastic deformation of rubber and absorbs it. In addition, there is also provided one in which a metal plate such as a steel plate is embedded in a laminated rubber, or a rubber layer and a metal plate such as a steel plate are alternately laminated to increase the absorption efficiency of vibration energy.

[0003]

However, since all of the above-mentioned vibration control devices are large-scale, there is a problem that the building in which the vibration control device is installed becomes large. For example, in the laminated rubber type vibration damping device, it is necessary to secure the elastic deformation amount of the rubber so as not to destroy the building, but if a sufficient elastic deformation amount is secured in the rubber, it is possible to adopt a large-sized one. There was a problem that it could not be avoided. For this reason, for example, buildings, such as houses, which are smaller than buildings, are not suitable for installation of a laminated rubber type vibration damping device, causing the installation to not spread. Also, the vibration control device
Although structural members such as pillars and beams of buildings are allowed to displace and do not break, structural materials such as pillars and beams of general houses have lower strength than structural materials of buildings, etc. Conventionally, there has been no suitable vibration damping device capable of efficiently absorbing vibration energy without destroying such a low-strength structural material. In addition, the said problem is not limited to the vibration control device applied to a building, For example, it is common also about various vibration control devices applied to various structures, such as a bridge and a tower.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and provides a vibration control device capable of efficiently absorbing vibration energy by sliding between a resin layer and a plate, so that the vibration control device can be downsized. It is intended for.

[0005]

According to the present invention, a resin layer made of urethane or the like and a plate having a smooth sliding surface in contact with the resin layer are laminated, and the plates laminated on both ends are provided. Structural members such as building foundations, columns and beams, and bridge girder of a bridge are connected to each other, and when a displacement force from the structural material acts on the plate, a force is generated between one or more plates and the resin layer. The vibration control device is characterized in that the displacement force is absorbed by sliding. According to the present invention, when vibration energy acts on a building such as a building or a bridge, a plate connected to a structural material constituting the building is displaced and slides with respect to the resin layer. A similar structure is configured to absorb vibration energy by sliding resistance. When a specific plate is suddenly displaced by vibration energy from a structural material, another plate adjacent thereto may be displaced via a resin layer in accordance with the sudden displacement, and in this case, a plurality of stacked plates may be displaced. Sliding occurs between the two plates and the resin layer, and each absorbs vibration energy.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG.
This will be described with reference to FIG. First, a building 2 to which the vibration damping device 1 of the present embodiment is applied will be described. As shown in FIGS. 1 and 2, four pillars 3 are erected in the center of the building 2, and a plurality of vertical portions of the pillars 3 are erected so as to bridge between the pillars 3. They are connected by beams 4. A square or rectangular space 5 (see FIG. 2) surrounded by the beams 4 is formed in the center of the building 2, and the pillars 3 and the beams 4 constitute a strong central frame 6. I do. As shown in FIG. 1, each beam 4 projects outward from the central frame 6, and the floor 2 a of each floor of the building 2 is constructed using the projecting portion. In addition, a small beam (not shown) connected to each beam 4 and a floor 2a
The wall is constructed using the side columns 7 provided so as to be suspended from the like. Pillar 3, beam 4, side pillar 7, floor 2a, etc.
Each is a structural material constituting the building 2.

Reference numeral 16 in FIG. 1 denotes a rotating mechanism.
The building 2 is rotated around the vertical axis at the center of the center frame 6 by being constructed on the rotating mechanism 16. In the building 2, by the rotation of the rotation mechanism 16, for example, it is possible to appropriately secure the sunshine of all the rooms around the central frame 6 or to follow the movement of the sun so that a specific room always faces the sun. Is possible. As a result, solar energy can be effectively used, and livability can be improved. For example, it can be effectively used for recreation such as sunbathing. The space 5 inside the central frame 6 is used for installing stairs, elevators, and the like.

[0008] The lower end of each side pillar 7 and the floor 2a and the small beam below it are connected via the vibration damping device 1 of the present embodiment. FIG. 3 is a perspective view showing the vibration damping device 1, and FIG. 4 is a front sectional view showing the vibration damping device 1. 3 and 4, urethane is provided between a fixing plate 8 fixed to the lower end of the side pillar 7 and a fixing plate 9 fixed on the floor 2a by fasteners 15 (bolts in FIGS. 3 and 4). The resin layers 10 and the plates 11 are alternately stacked. Each plate 8, 9, 11 has a smooth sliding surface 8b,
9b, 11b and the resin layer 10 make it possible to smoothly slide each other. In the present embodiment, the resin layer 10 is a single sheet (for example, a cloth base material provided with urethane or the like as a resin constituting the resin layer). 11 may be attached. As the resin constituting the resin layer 10, a resin such as urethane, which can be slid, is used. The thickness of the resin layer 10 may be about several mm. Each of the fixed plates 8 and 9 functions as a plate that slides on the plate 11.

As shown in FIG. 4, both fixing plates 8 and 9
The bolts 12 connecting between the two fixed plates 8, 9 and,
Through holes 8 opened in each resin layer 10, plate 11, etc.
a, 9a, 10a, and 11a are freely inserted in a floating manner and are fastened between the fixed plates 8 and 9 by tightening a nut 13 at a tip protruding outside the fixed plate 9.
As a result, the resin layer 10 and the plate 11 are sandwiched between the fixed plates 8 and 9. However, the fastening force of the bolt 12 and the nut 13 is such that the sliding between the fixing plates 8, 9, 11 and the resin layer 10 is enabled.

The movable range of sliding of the fixed plates 8 and 9, the resin layer 10 and the plate 11 is limited to the through holes 8 a, 9 a and 1.
It is set by the movable range of the bolt 12 within 0a and 11a. The inner diameter of the through holes 8a, 9a, 10a, and 11a is set to, for example, about two to three times the outer diameter of the bolt 12, and the fixing plates 8, 9, the resin layer 10, and the plate 11
The inner surfaces a, 9a, 10a, and 11a can be freely displaced independently to positions where the inner surfaces abut on the bolt 12. The head 12a and the nut 13 of the bolt 12 and the fixing plates 8 and 9
Since the washer 14 having an outer diameter sufficiently larger than the through holes 8a and 9a is interposed between the head holes 12a and 9a, the head 12a and the nut 13 are provided with the through holes 8a, 9a, 10a,
The fall into 11a is prevented.

[0011] The building 2 is given vibrational energy of roll due to an earthquake, strong wind, or the like. For example, a displacement force acts between the side pillar 7 and the floor 2a connected via the vibration damping device 1 to fix the building. When relative horizontal displacement occurs between the plates 8, 9, the sliding energy between the fixed plates 8, 9 and the resin layer 10 absorbs and attenuates the vibration energy. Since the resin layer 10 and the plate 11 can be moved independently, the fixing plate 8,
When the resin layer 10 is displaced to some extent following the displacement of 9, the resin layer 10 slides between the plate 11 and the vibration energy is absorbed and attenuated. Plural side pillars 7 and floor 2a on each floor of building 2
In the meantime, the vibration energy is similarly absorbed by the vibration damping device 1, so that the vibration of the entire building 2 is attenuated in a short time.
Even if a strong earthquake acts, the building 2 is hardly destroyed, and the earthquake resistance is improved.

In the sliding operation between the plates 8, 9, 11 and the resin layer 10, the frictional resistance between the sliding members becomes a sliding resistance, and the sliding is forcibly performed against the sliding resistance. By that
Vibration energy is absorbed. As the plate 11, a material having excellent corrosion resistance, such as a stainless steel plate, is used. When rust occurs on the metal plate, the sliding resistance between the metal plate and the resin layer 10 becomes extremely large due to the unevenness of the surface, and consequently, quick response (sliding) to vibration energy becomes difficult, and sliding starts. Until the vibration energy is absorbed, it becomes difficult to protect the side pillars 7 and the like from destruction. However, if the plate 11 made of a material having excellent corrosion resistance such as stainless steel is applied, excessive sliding resistance due to rust can be prevented, and smooth sliding with the resin layer 10 can be performed for a long period of time. There is an advantage that energy can be absorbed smoothly at all times and breakage of the side pillars 7 can be prevented.
Even when a general steel material is used as the plate, if the sliding surface is covered with the resin layer, a large increase in the sliding resistance due to rust can be avoided, and the cost can be reduced. The formation of the resin layer is also easy. However, in order to obtain a large number of sliding surfaces with a small number of plates and to increase the ability to absorb vibration energy, it is advantageous to use a single resin layer 10.

As for the fixing plates 8 and 9, it is preferable to use one that is hardly rusted, like the plate 11. However, in this vibration damping device 1, even if the sliding resistance between the fixing plates 8, 9 and the resin layer 10 becomes very large,
If sliding between the plate 11 and the resin layer 10 is possible, vibration energy can be absorbed. That is, in the vibration damping device according to the present invention, if sliding occurs between any one of the plurality of laminated plates and the resin layer, vibration energy can be absorbed, and the pair of the sliding plate and the resin layer can be absorbed. Is more than one, the amount of vibration energy absorbed further increases.

The plates 8, 9, 11 and the resin layer 10
If a Teflon layer is applied to the surfaces that are in sliding contact with each other, or if a lubricant such as grease is provided, the sliding resistance can be reduced, so that an appropriate sliding resistance can be obtained. is there. In particular, when the strength of the side pillars 7 is weak, it is preferable that the sliding resistance is sufficiently reduced, sliding is easily caused, and the side pillars 7 are protected from destruction. Thereby, a relatively low strength can be adopted as the side pillar 7, and a reduction in size and weight can be achieved. When the small side pillars 7 are employed, it is possible to widen the living space in the building 2.

The vibration damping device 1 can absorb vibration energy if sliding occurs between each of the plates 8, 9, 11 and the resin layer 10, while the vibration damping device of the laminated rubber type can absorb vibration energy. Since the absorption depends on the amount of elastic deformation of the rubber itself, the vibration damping device 1 can be reduced in size as compared with a laminated rubber vibration damping device. This also makes it possible to widen the living space in the building 2.

The vibration damping device 1 according to the present invention has a structure in which each plate 8,
When the vibration energy reaches a critical value at which sliding occurs between each of the plates 8, 9, 11 and the resin layer 10, no sliding occurs between the plates 9, 9, 11 and the resin layer 10. Sliding between 8, 9, 11 and the resin layer 10 progresses at a stretch. At this time, since the vibration damping device 1 is superior in terms of response speed as compared with the elastic deformation of the laminated rubber, each of the plates 8, 9,
By adjusting the sliding resistance between the resin layer 11 and the resin layer 10 to prevent the vibration energy of such a degree as to destroy the structural material from acting on the structural material in accordance with the strength of the structural material, etc. Destruction can be reliably prevented.

In the building 2 shown in FIG. 1, vibration energy, particularly in the horizontal direction (horizontal direction) due to an earthquake or a strong wind (including a tornado) is provided between each side pillar 7 and a floor 2a therebelow. The vibration can be efficiently absorbed by the vibration control device 1 provided. In the building 2 rolled by the vibration energy in the lateral direction, first, the vibration energy appearing as a relative displacement force between the side pillar 7 and the floor 2a is applied to the resin layer 10 and the plate 11 by each vibration control device 1. , And the curved central frame 6 rolls in the opposite direction due to a force or the like that attempts to return to the original shape.
Occurs, the vibration energy is absorbed by the sliding between the resin layer 10 and the plate 11, whereby the vibration energy is attenuated every time the vehicle rolls.
The shaking of the entire building 2 is eliminated. Each side pillar 7 separated from the central frame 6 is allowed to be displaced from the floor 2a by the vibration damping device 1, and is prevented from being subjected to a bending force or a shear force exceeding a breaking limit, and is broken. Is prevented.
Moreover, since the vibration damping device 1 is attached to all the side columns 7, it is possible to avoid a situation in which lateral vibration energy acts intensively on a specific side column 7 to cause partial destruction. Therefore, even if the building 2 rolls, the side columns 7 and the floor 2
Since a and the like are less susceptible to deformation such as bending, and the center frame 6 repeats shaking (bending) only within a range where the center frame 6 can return to the original shape, the vibration energy is gradually attenuated, and the shaking stops. Is hard to break during rolling, and the seismic strength is improved. Further, in the building 2 that rotates as in the present embodiment, the vibration due to the rotational drive always acts on the building 2, but the sliding resistance between each plate and the resin layer in the vibration damping device 1 is greatly reduced, By making it possible to absorb even small vibrations, the vibrations can be greatly reduced, and excellent livability can be obtained.

The present invention is not limited to the above-described embodiment, and various changes can be made. For example, the application target of the vibration control device of the present invention is not limited to a building, but may be a bridge, an artificial ground, or the like.
It is applicable to various structures. In FIG.
Although the configuration in which the vibration damping device 1 is installed between the vibration control device 1 and the floor 2a below the above is exemplified, the installation position of the vibration damping device 1 is not limited to this, and can be appropriately selected. Mechanism 1
6 or between the rotation mechanism 16 and the foundation 17. Various types of structures can be adopted as the vibration damping device. For example, instead of the bolts 12 that are used to connect a pair of fixed plates sandwiching a resin layer or a plate, elastically deformable components such as lead columns and rubber columns are used. It is also possible to change to In this case, in addition to the sliding resistance between the resin layer and the plate, the vibration energy can be absorbed by the deformation of the connecting member, and the vibration energy absorbing ability is improved. The number of plates is not limited to the above embodiment, and may be larger.

[0019]

As described above, according to the vibration control device of the present invention, the vibration energy (displacement force) acting from the structural material such as the foundation of the building, columns and beams, and the bridge girder of the bridge is reduced by one or more. By sliding between the sliding surface of the plate and the resin layer, displacement force such as vibration energy is efficiently absorbed and attenuated, so that there is no need to increase the size as in a laminated rubber type vibration damping device, for example. Moreover, cost reduction is possible. Also, since the sliding between the resin layer and the plate progresses rapidly after starting,
An excellent effect is obtained in that deformation forces such as bending and shear acting between the structural members connected to the plate are quickly eliminated, and the structural materials can be prevented from being broken.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of the present invention, and is a front view showing a building to which a vibration damping device is applied.

FIG. 2 is a plan sectional view showing the building of FIG. 1;

FIG. 3 is a perspective view showing a vibration damping device applied to the building of FIG. 1;

FIG. 4 is a sectional view showing an internal structure of the vibration damping device of FIG. 3;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vibration control device, 2a ... Structural material (floor), 7 ... Structural material (side pillar), 8, 9 ... Plate (fixed plate), 8b, 9
b, 11b: sliding surface, 10: resin layer, 11: plate.

Claims (1)

[Claims] 1. A resin layer made of urethane or the like, and a plate having a smooth sliding surface in contact with the resin layer are laminated. Structural materials such as beams and bridge girders are connected,
When displacement force from the structural material acts on the plate, the displacement force is absorbed by sliding generated between one or more plates and the resin layer. Quake device.