JPH0660538B2 - Dynamic vibration control method and apparatus using weight of building body - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dynamic vibration damping method and apparatus that utilizes the weight of a building body to prevent middle- and high-rise buildings from being damaged by an earthquake or a strong wind.

2. Description of the Related Art At present, as a vibration isolation technology for buildings, for example, as shown in FIG. 4, the whole building 5 is separated from a foundation 6 and floated, and a vibration isolator 7 such as laminated rubber or a spring is interposed therebetween. At the same time, an oil damper 8 is provided between the foundation 6 and the foundation 6 to minimize the natural frequency of the system consisting of the building and the vibration isolator so as to suppress the magnitude of the input of seismic energy into the building. Shaking methods have been developed.

Problems to be Solved by the Invention However, the above conventional vibration isolation method has the following problems.

(1) Since the entire building must be supported by vibration-isolating bodies such as laminated rubber and springs, a very large vibration-isolating body is required. Costly.

(2) Not only is it necessary to provide a space around the building for the entire building to move laterally in the event of an earthquake, but the connection structure between gas, water, and other piping equipment and external equipment becomes complicated and large-scale.

(3) Thin and tall buildings such as 10th floor and above, which cannot be used due to the risk of falling.

(4) For long-period earthquakes, the conventional isolation method may cause a resonance phenomenon. Therefore, it was not possible to isolate the vibration on the soft ground of the third type.

Means for Solving the Problems The dynamic vibration damping method using the weight of the building body of the present invention is intended to solve the above conventional problems,
Its structure is characterized in that the weight of the main body of the building located at an arbitrary height of the building is used as the weight of the pendulum so that it can independently swing during an earthquake to suppress the shaking of the other main body of the building. Yes, and the structure of the dynamic damping device is that the building main body part located at an arbitrary height of the building is configured independently of the other building main body parts, and the vibration isolator is interposed between them. It is a feature.

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

In FIG. 1, reference numeral 1 denotes a middle-high-rise building such as a reinforced concrete structure, a steel-framed reinforced concrete structure, or a steel frame structure, in which the uppermost floor portion 1a is separated from the lower floor portion 1b, and a laminated rubber / spring structure is provided therebetween The pendulum 2 is inserted and constitutes a pendulum system.

The top floor portion 1a and the lower floor portion 1b are separated from each other by
It is enough to be structurally separated, and at least when the structure is such that the uppermost floor portion 1a independently swings as a pendulum with respect to the lower floor portion 1b at the time of an earthquake, it is not necessary to completely separate it. It may be weak or slidable and integrally configured. Therefore, it is preferable that at least the outer wall portion has a continuous appearance.

In addition, the stairs, elevators, escalators, ducts, pipes, etc. arranged vertically connecting the uppermost floor portion 1a and the lower floor portion 1b include the uppermost floor portion 1a and the lower floor portion 1
It is necessary to devise to allow mutual movement with b.

The lower floor portion 1b of course means a plurality of floors, but the uppermost floor portion 1a is not limited to the uppermost floor, but 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 3.

Further, a damper mechanism 4 such as an oil damper is installed between the uppermost floor portion 1a and the lower floor portion 1b so as not to cause excessive shaking. The damper mechanism 4 is arranged so as to work in any direction.

Since the present embodiment is configured as described above, as shown in FIG. 2, at the time of an earthquake or strong wind, the weight of the uppermost floor portion 1a sways greatly as a weight of a pendulum for vibration during an earthquake or strong wind. On the other hand, on the contrary, the lower floor portion 1b is not so much shaken and is damped.

According to an experiment conducted by the present inventor, the shaking of the top floor portion 1a is 20
%, But the lower floor portion 1b decreases by about 20-40%.

Therefore, by using the uppermost floor portion 1a as a layer that can be shaken greatly, 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 layer portion 1c of the building 1 and the upper floor portion 1d integrally formed with each other by a structure such as a pillar and / or a wall. The lower floor portion 1e is configured independently, and the vibration isolator 2 and a damper mechanism (not shown) are interposed between the lower floor portion 1e and the middle floor portion 1c to positively increase the vibration, thereby lowering the upper and lower floor portions 1e.
Try to suppress the shaking of d and 1e.

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

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

EFFECTS OF THE INVENTION (1) Since the top floor part or middle floor part used as a pendulum swings largely and suppresses the swinging of other floor parts, not only the safety of the building during an earthquake or strong wind but also the building is improved. It can be economically configured by simplifying its own member and structure.

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

(3) Vibration can be isolated even in a building where twisting is likely to occur.

(4) The size of the vibration isolator is small.

(5) No special space is required around the building.

(6) Anti-vibration work can be performed by adding the top floor to the existing building.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention, FIG. 2 is an explanatory view showing a vibration damping function at the time of an earthquake, FIG. 3 is an explanatory view showing another embodiment of the present invention, and FIG. It is explanatory drawing which shows the conventional isolation structure. 1 ... Building, 1a ... Top floor portion, 1b ... Lower floor portion, 1c ... Middle floor portion, 1d ... Upper floor portion, 1e ...
... Lower floor part, 2 ... isolator, 3 ... ground, 4 ... damper mechanism.

Claims (5)

[Claims] 1. A structure in which the weight of a main body portion of a building located at an arbitrary height of the building is used as a weight of a pendulum so that the main body portion independently swings during an earthquake or a strong wind to prevent the other main body portion of the building from swinging. Dynamic damping method using the weight of the building body. 2. The dynamic damping method using the weight of the building body according to claim 1, wherein the weight of the top floor of the building is the weight of the pendulum. 3. The weight of a building body, characterized in that a building body portion located at an arbitrary height of a building is formed independently of other building body portions, and a vibration isolator is interposed between the building body portions. Dynamic damping device used. 4. The building main body portion located at an arbitrary height of the building is the uppermost floor portion.
A dynamic vibration damping device using the weight of the building body according to the item. 5. A damper mechanism is interposed between a building main body portion located at an arbitrary height of the building and another building main body portion, and a damper mechanism is provided.
A dynamic vibration damping device using the weight of the building body according to the item.