JPH0784817B2 - Dynamic damping method and device for building - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic vibration damping method and device for preventing middle- and high-rise buildings from being damaged by vibrations such as earthquakes and strong winds.

2. Description of the Related Art Currently, as a vibration isolation technology for buildings, as shown in FIG. 6, for example, a building 1 is separated from a foundation 2 and floated, and a vibration isolator 3 such as laminated rubber or a spring is inserted between them. With
There is a vibration isolation method in which an oil damper 4 is installed laterally between the foundation 2 and the natural frequency of the system consisting of the building and the vibration isolator to be as small as possible to suppress the magnitude of seismic energy input to the building. Being developed.

Problems to be Solved by the Invention However, although the above-described conventional vibration isolation method has a vibration damping effect against a short-period earthquake, etc., a resonance phenomenon may occur on the contrary against a long-period earthquake. There is a nature. Therefore, there is a problem that vibration isolation cannot be performed on the soft ground of the third type.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to effectively suppress vibrations against either long-period or short-period earthquakes. It is to provide a method and an apparatus capable of doing so.

Means for Solving the Problems A method for dynamically damping a building according to the present invention is to separate a middle-high-rise building from a foundation and to provide a vibration isolator such as a laminated rubber / spring and an oil damper between the building and the foundation. In the one provided with the damper mechanism, the weight of the building main body portion located at an arbitrary height of the above-mentioned building, as the weight of the pendulum at the time of vibration due to an earthquake, strong wind, etc. It is characterized by suppressing the shaking of the building, and the dynamic vibration control system of the building separates the middle and high-rise building from the foundation, and the rubber laminated between the building and the foundation.
In addition to inserting a vibration-isolating body such as a spring and installing an oil damper between the building and the foundation on the side of the building, the building body located at any height of the building should be It is characterized in that it is configured to independently sway, and a vibration-isolating body is interposed between the building body portion and another building body.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a middle-high-rise building such as a reinforced concrete structure, a steel-framed reinforced concrete structure, or a steel frame structure. An oil damper 4 is provided between the foundation 2 and the base 2 while being inserted.

Further, the uppermost floor portion 1a of the building 1 is separated from the lower floor portion 1b, and a vibration isolator 5 made of laminated rubber, a spring or the like is interposed therebetween to form a pendulum system.

Incidentally, the top floor portion 1a and the lower floor portion 1b are separated from each other in terms of structural strength, and at the time of an earthquake, the top floor portion 1a independently acts as a pendulum with respect to the lower floor portion 1b. If it has a swaying structure, it is not necessary to completely separate it, and a weak member or a slide type may be integrally formed. Therefore, it is preferable that at least the outer wall portion has a continuous appearance.

In addition, the stairs connecting the top floor part 1a and the lower floor part 1b
Elevators, escalators, vertically arranged ducts, pipes, etc. must be devised to allow mutual movement between the top floor 1a and the lower floor 1b.

It should be noted that the lower floor portion 1b means a plurality of floors, but the uppermost floor portion 1a is not limited to the uppermost floor, and may be a plurality of floors.

The natural frequency of the pendulum in the case of using the uppermost floor portion 1a as the pendulum is determined by investigating the natural frequency of the system including the lower floor portion 1b and the ground.

Further, a damper mechanism 6 such as an oil damper is installed between the upper floor portion 1a and the lower floor portion 1b so as not to cause excessive shaking. The damper mechanism 6 is arranged so as to work in any direction.

Since this embodiment is configured as described above, for short-period earthquakes or strong winds, as shown in FIG. 2A,
It is possible to prevent energy such as earthquakes from entering the building 1,
The whole building 1 shakes slowly.

Also, for long-period earthquakes, etc., as shown in FIG. 2B, the weight of the uppermost floor portion 1a sways significantly as a pendulum weight for vibration during an earthquake or strong wind, while the lower floor portion 1b On the other hand, it does not shake so much and is controlled.

According to an experiment conducted by the present inventor, the vibration of the uppermost floor portion 1a is increased by about 20%, while the lower floor portion 1b is decreased by about 20 to 40%.

Therefore, by using the uppermost floor portion 1a as a floor that can be shaken largely, such as a machine room, it is possible to prevent the entire building from being substantially damaged.

FIG. 3 shows another embodiment of the present invention, in which the middle-floor portion 1c of the building 1 and the upper-floor portion 1d which are integrally formed with each other by a structure such as pillars and / or walls It is configured independently from the lower floor portion 1e, and the vibration isolator 7 and damper mechanism (not shown) are interposed between them to positively increase the shaking of the middle floor portion 1c during a long-period earthquake. , The upper and lower floors 1d and 1e should be suppressed.

As for the position of the middle floor portion 1c, it is desirable that the building 1 is provided at a position where the damping effect is highest as a whole.

Also in the present embodiment, the middle floor portion 1c is not limited to the first floor but may be a plurality of floors.

FIG. 4 shows yet another embodiment, in which the roof 1a 'of the uppermost floor portion 1a of the building 1 is cut off, and a vibration isolator 8 made of laminated rubber, springs, etc. is interposed therebetween. It forms the pendulum system.

It is sufficient that the roof 1a 'on the top floor 1a is separated in structural strength, and at least if the roof 1a' swings independently as a pendulum during an earthquake, it must be completely separated. Instead, it may be weak in strength or integrally formed in a sliding manner.

Further, a damper mechanism 9 such as an oil damper is installed between the pillar and the wall 1a ″ of the uppermost floor portion 1a so that the roof 1a ′ of the uppermost floor portion 1a does not shake excessively.

FIG. 5 shows still another embodiment of the present invention, in which the pillar and wall 1 of the uppermost floor portion 1a including the roof 1a 'are included.
a ″ is also integrally configured and separated from the floor of the uppermost floor portion 1a, and independently configured, and the vibration isolator 10 and the damper mechanism 11 are interposed between them, and the uppermost floor portion 1a roof 1a ′ and pillars / walls 1a ″ The swing of the floor is actively increased to suppress the swing below the floor of the top floor portion 1a.

Advantages of the Invention (1) When the vibration such as an earthquake has a short cycle, the entire building is greatly shaken by the vibration isolator of the foundation part to prevent the building from being destroyed. In the case of a long cycle, it is used as a pendulum. As the top floor, middle floor, roof, etc. are greatly shaken and other floors are prevented from shaking, not only the safety of the building is increased, but also the members and structure of the building itself are simplified, making it economical. Can be configured to.

(2) Since the weight of the weight can be made large, not only is the vibration damping effect great, but since no special weight is required, the weight of the building is lighter, and it is inserted between the building and the foundation. There is an advantage that the load of the vibration isolator becomes light.

(3) Since the vibration isolator is inserted in the lower part of the building to separate it from the foundation, the natural frequency of the building becomes clear, and the pendulum design becomes easy.

(4) It can also be used for high-rise buildings with 10 or more floors, which is difficult with conventional vibration isolation.

(5) Anti-vibration can be performed even in a building that is easily twisted.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention, FIGS. 2A and 2B are explanatory views showing a vibration damping action during an earthquake, and FIGS. 3 to 5 are other embodiments of the present invention. FIG. 6 is an explanatory diagram showing a conventional vibration isolation structure. 1 ... Building, 1a ... Top floor, 1a '... Roof, 1a "...
… Wall, 1b …… Lower floor, 1c …… Middle floor, 1d …… Upper floor, 1e …… Lower floor, 2 …… Basic, 3,5,7,8,10
…… Vibration-isolator, 4, 6, 9, 11 …… Damper mechanism.

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Kunio Nakamura 4-29-23 Takadanobaba, Shinjuku-ku, Tokyo (56) References JP-A-59-97341 (JP, A)

Claims (9)

[Claims] 1. A structure in which a middle- and high-rise building is separated from a foundation and a vibration isolator such as laminated rubber and springs and a damper mechanism such as an oil damper are provided between the building and the foundation, and the building has an arbitrary height. The weight of the building main part located is used as the weight of the pendulum at the time of vibration due to an earthquake or strong wind, so that it can be swayed independently of other building main parts to suppress the sway of the building. Dynamic damping method. 2. The dynamic damping method for a building according to claim 1, wherein the building body is the uppermost floor. 3. The dynamic damping method for a building according to claim 1, wherein the building body is a middle floor of the building. 4. The dynamic damping method for a building according to claim 1, wherein the building body is a roof or a pillar / wall on the top floor and a roof. 5. A high-rise building is separated from a foundation, a vibration-isolating body such as laminated rubber or a spring is interposed between the building and the foundation, and an oil damper is provided between the foundation and the side of the building. In which the building body located at an arbitrary height of the building is configured to independently swing with respect to the other building body, and the vibration isolator is provided between the building body portion and the other building body. A dynamic vibration control system for buildings, characterized by the inclusion of 6. The dynamic vibration damping device for a building according to claim 5, wherein the building body is a top floor part. 7. The dynamic vibration damping device for a building according to claim 5, wherein the building body is a middle layer. 8. The dynamic vibration control system for a building according to claim 5, wherein the building body is a roof or a pillar / wall and a roof on the uppermost floor. 9. A damper mechanism is interposed between a building body located at an arbitrary height of the building and another building body, and any one of claims 5 to 8 is claimed. The dynamic vibration damping device for a building according to the paragraph.