JP2009097301A - Rolling base isolation bearing device with damping function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable vibration damping while enabling rolling base isolation support, and to facilitate construction, maintenance, and basic design. <P>SOLUTION: One end of a telescopic damper 5 is connected to the peripheral edge of one of upper and lower pans 2 through a ball joint 6, and the other end of the telescopic damper 5 is connected to the peripheral edge of the other of upper and lower pans 3 through a ball joint 6. The telescopic motion of the telescopic damper 5 is performed so as to follow a horizontal relative displacement of the upper and lower pans 2, 3 due to base isolation, thereby damping vibration. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rolling seismic isolation device having a damping function.

  Rolling-isolated bearing device provided with upper and lower dishes and a sphere arranged between the dishes, and designed to perform seismic isolation by the relative displacement of the upper and lower dishes in the horizontal direction and the following rolling movement of the sphere. By using this, the base-isolated building that is designed to isolate the upper structural part in the event of an earthquake by interposing it between the foundation as the lower structural part and the upper structural part has been conventionally provided. Yes.

Further, in this base-isolated building, it has been conventionally practiced to provide a damping device for attenuating the vibration caused by the earthquake separately from the above-mentioned rolling base-isolated bearing device.
JP 2003-97621 A

  However, in the structure where the seismic isolation bearing device and the damping device are individually installed in different positions, the construction and maintenance are troublesome, and the foundation for securing the arrangement space of each device is difficult. There is a problem that the design is also troublesome.

  In view of the above-mentioned problems, the present invention is capable of damping vibrations while being able to make a rolling base-isolation support, and yet to facilitate construction, maintenance, and basic design. The task is to do.

The above-described problem is provided with upper and lower dishes and a sphere disposed between the dishes, and is designed to perform seismic isolation by the relative displacement of the upper and lower dishes in the horizontal direction and the accompanying rolling movement of the sphere. In rolling seismic isolation equipment,
One end of the telescopic telescopic damper is connected to the peripheral edge of the upper and lower dishes via a universal joint means, and the other end of the telescopic telescopic damper is connected to the peripheral edge of the other upper and lower dishes. One end is connected via a universal joint means, and the telescopic telescopic damper performs an expansion / contraction operation following the horizontal displacement of the upper and lower plates due to seismic isolation so as to attenuate the vibration. The invention is solved by a rolling seismic isolation device having a damping function (first invention).

  This device is equipped with a telescopic telescopic damper with the upper and lower dishes constituting the rolling seismic isolation device as a connecting part, so that it can perform rolling seismic isolation and can also be attenuated. In the construction, if a rolling seismic isolation device is installed, a damper is installed and the construction can be performed easily. In addition, the maintenance can be facilitated because the position where the rolling seismic isolation bearing is maintained is the same as the position where the damper is maintained. In the basic design, it is only necessary to perform the design in consideration of the installation position of the rolling seismic isolation device, and it is not necessary to consider the installation position of the damping mechanism portion, and the basic design can be facilitated.

  In the first invention, a plurality of the telescopic telescopic dampers may be provided, and these telescopic dampers may be provided at predetermined intervals in the circumferential direction on the peripheral portions of the upper and lower dishes (second invention). In this case, the vibration at the time of base isolation can be effectively attenuated by a plurality of dampers, and the mechanical stability with respect to the damping force can be increased.

  In the second invention, all or part of the telescopic telescopic damper may be detachable from both or one of the upper and lower dishes (third invention). In this case, the number of telescopic expansion / contraction dampers can be selected, and the damping force can be adjusted.

  In the first to third aspects of the invention, the telescopic expansion / contraction damper comprises a friction damper that attenuates vibration by friction (fourth aspect), or the telescopic expansion / contraction damper generates vibration energy by deformation of a viscoelastic body. In the case of the absorbing viscoelastic damper (the fifth invention), the damping mechanism can be advantageously incorporated with a simple mechanism in terms of cost, and an effective damping action can be exhibited.

  Since the present invention is as described above, the vibration can be attenuated while being able to make a rolling base isolation bearing, and construction, maintenance, and basic design can be facilitated.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  The rolling seismic isolation device 1 according to the embodiment shown in FIGS. 1 and 2 has a structure in which a sphere 4 is arranged between upper and lower dishes 2 and 3 as shown in FIGS. As shown in FIGS. 1 (a) to 1 (c), when the upper and lower dishes 2 and 3 are displaced relative to each other in the horizontal direction due to an earthquake, the sphere 4 rolls along with it and performs seismic isolation support. It is made like that.

  As shown in FIGS. 2 (a) and 2 (b), a telescopic telescopic damper 5 is vertically arranged between the peripheral portions of the upper and lower dishes 2 and 3, and one end thereof is a universal joint. The upper and lower plates 2 are detachably connected via a ball joint 6 as means, and the other end is also detachably connected to the upper and lower plates 3 via the ball joint 6. As shown in 1 (a) to (c), when the upper and lower dishes 2 and 3 are relatively displaced in the horizontal direction, the telescopic telescopic damper 5 is in a vertical state or in an inclined state following the relative displacement. The vibration is attenuated by the expansion and contraction.

  In this embodiment, as shown in FIGS. 2 (a) and 2 (b), a plurality of telescopic telescopic dampers 5 are provided, and these telescopic dampers 5 are circumferentially disposed between the peripheral portions of the upper and lower dishes 2 and 3. Are provided at predetermined intervals.

  As shown in FIGS. 3A and 3B, each telescopic telescopic damper 5 is vibrated by friction between the inner peripheral portion of the outer cylinder 5a and the outer peripheral portion of the inner cylinder 5b via a friction pad 5c. It is also possible to use a friction damper that dampens, or as shown in FIGS. 3 (c) and 3 (d), there is a viscosity between the inner periphery of the outer cylinder 5a and the outer periphery of the inner cylinder 5b. The elastic body 5d may be interposed between both peripheral surfaces, and may be composed of a viscoelastic damper that attenuates vibration by shearing and deforming the viscoelastic body 5d as the damper 5 expands and contracts.

  For example, the telescopic telescopic dampers 5 are assembled to the upper and lower dishes 2 and 3, and the spherical body 4 is arranged at the center position between the upper and lower dishes 2 and 3. , 3 and the sphere 4 are integrated in advance in a factory or the like, installed on the foundation 7 as the lower structure of the building, and the lower plate 2 is connected to the foundation 7, The upper structure portion 8 of the building is installed on the upper plate 3, the upper structure portion 8 and the upper plate 3 are connected, and then the integration of the upper and lower plates 2, 3 and the sphere 4 is released. This is done.

  In the rolling seismic isolation device 1 having the above-described damping function, when a seismic vibration occurs in a building incorporating this, the sphere 4 rolls as shown in FIGS. While the structure part 8 is seismically isolated, the telescopic telescopic dampers 5 are expanded and contracted to attenuate the vibration. In particular, in the present embodiment, a single rolling seismic isolation device 1 is provided with a plurality of telescopic telescopic dampers 5... Spaced apart in the circumferential direction between the peripheral portions of the upper and lower dishes 2 and 3. In addition, the vibration at the time of base isolation can be effectively attenuated by the plurality of dampers 5 and the damping force can be made excellent in mechanical stability with little eccentricity.

  In the construction, as described above, if the integrated rolling seismic isolation device is installed, the damper 5 can be installed and the construction can be easily performed. 1 is the same as the position where the maintenance of the dampers 5 is performed, so that the maintenance can be easily performed. Further, in the foundation design, it is only necessary to design in consideration of the installation position of the rolling seismic isolation device 1, and it is not necessary to consider the installation position of the damping mechanism portion, and the design of the foundation 7 can be facilitated.

  In the above-described rolling seismic isolation device 1, the telescopic telescopic dampers 5 can be attached to and detached from the upper and lower dishes 2 and 3, so that the damping force can be adjusted by selecting the number to be used. Can do.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, the ball joint is used as the universal joint means. However, the telescopic telescopic damper is connected to the plate by the universal joint means using a rubber joint or a cross universal joint, and the same operation is performed. It may be made to be able to be performed.

FIGS. 1A to 1B are front views showing an operating state of the rolling seismic isolation device of the embodiment in which the telescopic telescopic damper on the near side is omitted in the drawing. FIG. 1A is a front view of the rolling seismic isolation device of the embodiment, and FIG. Fig. (A) is a longitudinal sectional view showing an example of a telescopic telescopic damper, Fig. (B) is a longitudinal sectional view showing its operating state, and Fig. (C) is a longitudinal sectional view showing another example of a telescopic telescopic damper. The figure and the figure (b) are longitudinal sectional views showing the operating state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Rolling seismic isolation device 2 ... Lower plate 3 ... Upper plate 4 ... Sphere 5 ... Telescopic expansion-contraction damper 6 ... Ball joint (universal joint means)

Claims (5)

Rolling-isolated bearing device provided with upper and lower dishes and a sphere arranged between the dishes, and designed to perform seismic isolation by the relative displacement of the upper and lower dishes in the horizontal direction and the following rolling movement of the sphere. In
One end of the telescopic telescopic damper is connected to the peripheral edge of the upper and lower dishes via a universal joint means, and the other end of the telescopic telescopic damper is connected to the peripheral edge of the other upper and lower dishes. One end is connected via a universal joint means, and the telescopic telescopic damper performs an expansion / contraction operation following the horizontal displacement of the upper and lower plates due to seismic isolation so as to attenuate the vibration. A rolling seismic isolation device with a damping function, characterized by being made.   2. A rolling seismic isolation bearing having a damping function according to claim 1, wherein a plurality of telescopic telescopic dampers are provided, and the telescopic dampers are provided at predetermined intervals in the circumferential direction at the peripheral edges of the upper and lower dishes. apparatus.   The rolling seismic isolation device having a damping function according to claim 2, wherein all or part of the telescopic telescopic damper is detachable from both or one of the upper and lower dishes.   4. The rolling seismic isolation device having a damping function according to claim 1, wherein the telescopic telescopic damper comprises a friction damper that attenuates vibrations by friction. 5.   4. The rolling seismic isolation bearing device having a damping function according to claim 1, wherein the telescopic telescopic damper comprises a viscoelastic damper that absorbs vibration energy by deformation of a viscoelastic body. 5.

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