JPH086490B2 - Building damping device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vibration damping device that suppresses vibration generated in a building during an earthquake or strong wind.

[Conventional technology]

In high-rise buildings, the period of swaying during earthquakes and strong winds is long, and even after the earthquake or strong winds subsides, they continue to give a feeling of badness and fear, so in recent years, the swaying width of high-rise buildings is the largest. It is common practice to install a damping device in the upper part of the building, whose cycle matches the natural vibration cycle of the entire building.

Such a vibration damping device is disclosed, for example, in JP-A-63-17.
As described in Japanese Patent No. 1965, a tank containing a liquid is installed at the top of a high-rise building, and after the building starts to vibrate due to an external force vibrating due to an earthquake or strong wind, the liquid is removed with a phase delay of a predetermined period. There is known a structure in which the vibration energy of a building is absorbed by vibrating it to suppress the shaking of the building.

[Problems to be Solved by the Invention]

However, according to the vibration damping device including the liquid tank as described above, the vibration cycle of the liquid stored in the tank changes in accordance with the size and volume of the tank, the mass of the liquid, and the like, and thus vibrates in the horizontal direction. It is difficult to set the vibration cycle of the liquid so as to match the natural vibration cycle of the building in any direction.

In addition, it is preferable to design the damping device to have a weight that is about one-hundredth of the entire building. However, if liquid is used, the entire device becomes large and requires a large installation space, and the liquid deteriorates or evaporates. In that case, there is a problem that a predetermined natural vibration period cannot be obtained.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a vibration damping device for a building that can achieve a highly accurate vibration damping action with a simple structure.

[Means for solving the problem]

In order to achieve the above object, the vibration damping device for a building described in the claims of the present invention is a vibration damping device that is installed on a floor of a building that vibrates in a horizontal direction with respect to the ground surface to damp the vibration of the building. , A building of a lower damping mechanism in which a cylindrical roller member having a predetermined diameter which rolls in a state of being clamped by these circular arc surfaces is interposed between upper and lower clamping members having concave circular arc surfaces on opposite surfaces. The roller members are fixed to at least three places on the floor in the state that they are oriented in the same direction, and an upper damping mechanism having the same structure as this lower damping mechanism has a cylindrical roller member that is a roller member of the lower damping mechanism. It is characterized in that it is arranged in a direction orthogonal to the above and is fixed on each lower damping mechanism, and a weight member is placed and fixed on these upper damping mechanisms.

In addition, as such a vibration damping device, as described in the claims, the upper and lower clamping members having opposing surfaces formed in spherical concave portions are clamped by the spherical surfaces of these concave portions. It is also possible to have a structure in which a vibration damping mechanism including a ball rolling in a state is fixed to at least three places on the floor of the building, and weight members are placed and fixed on these vibration damping mechanisms.

[Action]

According to the vibration damping device of the claim, when the external vibrational force in the left-right direction acts on the building, the weight members start to vibrate in the same direction with a phase delay of a predetermined period, and the upper sandwiched member supporting the weight member is vibrated. The pressure member swings on the circular arc surface of the lower clamping member via the roller member to absorb the vibration energy of the building and suppress the vibration.

When a vibration external force in the front-rear direction orthogonal to the left-right direction is applied to the building, the roller members are arranged in a superposed state in a direction perpendicular to the vibration-damping mechanism composed of the upper and lower clamping members. The vibration damping action is performed in the same manner as above by another vibration damping mechanism having a structure.

Therefore, it is possible to suppress vibrations in any direction on the horizontal plane which acts on the building by the vertical damping mechanism.

In this case, racks having the same degree of curvature as the circular arc surface are formed on both edge portions of the circular arc surface of the upper and lower clamping members in the vibration damping mechanism, while pinions that mesh with the rack are formed on both end portions of the roller member. As a result, the weight member can be reliably swung without causing a slip between the pressing member and the member, and further, an arcuate groove is formed along the arc direction at the center of the arc surface of the upper and lower pressing members. By providing the ring-shaped protrusion on the outer peripheral surface of the roller member and fitting in the arc-shaped groove, the roller member can be accurately rolled in the bending direction of the arc surface of the upper and lower clamping members.

In this way, when the opposing surfaces of the upper and lower clamping members are formed into arcuate surfaces and the cylindrical roller members are interposed between the opposing arcuate surfaces to form the vibration damping mechanism, the vibration damping mechanism is paired up and down. It is necessary to stack and arrange the roller members vertically so that the roller members are orthogonal to each other, but as described in the claims, the opposing surfaces of the upper and lower clamping members are formed in spherical recesses,
When a damping mechanism is constructed by interposing a sphere between the recesses, this damping mechanism can suppress the vibrations acting on the building in any of the front, rear, left and right directions in the horizontal direction. .

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, (A) is a vibration damping device of the present invention installed in the center on a floor (C) on the uppermost floor of a building (B).

As shown in FIG. 2, the vibration damping device (A) has a floor (C).
Lower damping mechanism (A ₁ ) arranged in at least three places so as to be the top position of the upper triangular shape and the upper portion arranged in a superposed state on each lower damping mechanism (A ₁ ). a damping mechanism (a _2), and is configured from a placed on the weight member in a bridged state on these upper damper _{(a 2) (a 3)} .

The lower damping mechanism (A ₁ ) and the upper damping mechanism (A ₂ ) have the same structure, and as shown in FIG. 3, the opposing surfaces are curved in a concave shape and have the same circular arc surface (4). ), A columnar roller member (3) having a predetermined radius r is interposed between the upper and lower clamping members (1) and (2) in a clamped state.

It should be noted that, when the upper and lower clamping members (1) and (2) relatively swing in the direction of the circular arc through the roller members (3) during vibration, to reliably swing without slipping. In addition, the upper and lower pressing members (1) and (2) and the circular arc surface (4) and the peripheral surface of the member (3) are formed into rough uneven surfaces, or as shown in the figure, the upper and lower pressing members ( 1) A rack (5) having the same curvature as the circular arc surface (4) is integrally provided over the entire length at both end edges of the circular arc surface (4) and both ends of the roller member (3). The pinion (6) that meshes with these racks (5) is formed or integrally provided in the part.

Further, while forming an arcuate groove (7) in the center of the opposing arcuate surfaces (4) and (4) of the upper and lower clamping members (1) and (2),
A ring-shaped ridge (8) loosely fitted in the arcuate groove (7) is provided at the center of the roller member (3), and the upper and lower clamping members (1) are provided.
(2) However, the member (3) and the member (3) are configured to be accurately movable relative to each other in the direction of the circular arc surface (4).

In the vibration damping mechanism (A ₁ ) (A ₂ ) configured in this way, the lower vibration damping mechanism (A ₁ ) moves its roller member (3) in the same direction (the front-back direction of the building (B) in the figure). The lower clamping member (1) is fixed on the floor (C) so as to face the upper clamping member (2) of the lower damping mechanism (A ₁ ).
An intermediate plate (9) is placed and fixed on the upper plate, and an upper damping mechanism (A ₂ ) is mounted on the intermediate plate (9) and its roller member (3).
Are oriented in the direction perpendicular to the roller member (3) of the lower damping mechanism (A ₁ ) (in the figure, the left-right direction of the building (B)) and overlap each lower damping mechanism (A ₁ ). Thus, the lower clamping member (1) is fixed.

In this case, the intermediate plate (9) is not always necessary, and as shown in FIG. 4, the upper clamping member (2) of the lower damping mechanism (A ₁ ) and the lower side of the upper damping mechanism (A ₂ ) are A lower damping mechanism is provided with an intermediate pressing member (10) having an integrated shape with the pressing member (1), that is, an intermediate pressing member (10) having arcuate surfaces (4) (4) formed on the upper and lower surfaces of one member in directions orthogonal to each other. (a ₁₎ may be the upper press member (2) arranged structure between the lower press member (1) and the upper vibration damping mechanism (a ₂₎ of the.

Further, as the weight member (A ₃ ) placed and fixed on the upper vibration control mechanism (A ₂ ) in a erected state, equipment equipment such as an ice heat storage tank having a desired weight is used.

And, like this, the floor (C) on the top floor of the building (B)
The damping device installed in the upper center is 1 / 100th of the whole building
The weight member (A ₃ ) has a weight of about a certain degree, and the period in which the weight member (A ₃ ) oscillates during vibration is matched with the oscillation period of the vibration of the entire building.

The natural vibration period T of this vibration damping device is set by setting the radius R of the clamping member (1) (2) of the vibration damping mechanism (A ₁ ) (A ₂ ) and the radius R of the member (3). It is determined by r by the following equation.

When the width of the front side and the side width of the building (B) are different, such as a rectangular cross section, since the natural vibration period of the building swaying in these directions is different, it corresponds to each swaying direction. Clamping member (1) for the vertical damping mechanism (A ₁ ) (A ₂ )
The radius R of the arc surface (4) of (2) and the radius r of the member (3) are set to have the same vibration period as the natural vibration period of the building.

If the building (B) has an elongated cross-sectional shape, the building (B) sways only in the direction of the short side. Therefore, as the vibration damping device, only one vibration damping mechanism that absorbs the sway in that direction may be provided.

With this configuration, when an earthquake occurs or the building (B) vibrates in the left-right direction due to strong winds, the weight member (A ₃ ) also starts oscillating with a phase delay of a predetermined period, The vibration energy of (B) is converted into the vibration energy of the weight member (A ₃ ), and the shaking of the building (B) is suppressed.

Swinging of this weight member (A ₃₎ is carried out by building the upper damping mechanism in the rocking direction (B) having an arcuate surface (4) (A _2), the upper vibration damping mechanism (A ₂₎ The upper and lower clamping members (1) and (2) are engaged with the arcuate racks (5) of these members and the pinion (6) of the roller member (3) while being engaged in the roller member (3) in the horizontal direction. It swings to.

Similarly, when the building (B) swings in the front-rear direction, the building (B) is damped through the lower damping mechanism (A ₁ ) provided with the arcuate surface (4) in that direction.

Therefore, the building (B) is installed by the vertical damping mechanism (A ₁ ) (A ₂ ).
Vibrations acting in any direction in the horizontal plane can be damped.

In the above description, it is described that the vibration having the same period as the natural vibration period of the building (B) is damped by the vibration damping device (A), but an earthquake includes vibrations of various frequencies. The fluctuating vibration does not greatly shake the building (B), but it impairs habitability.

Therefore, both ends of the hydraulic cylinder are connected between the floor (C) on the top floor and the intermediate plate (9) of the control device (A) and between the weight member (A ₃ ) and the intermediate plate (9). The respective oil dampers (11) and (12) are arranged so that their operating directions are orthogonal to each other.
1) It is configured so as to absorb the fluctuation vibration as described above by (12).

Next, FIG. 5 shows another vibration damping device (A ') of the present invention. In the above embodiment, the upper and lower clamping members (1) are shown.
The control mechanism (A ₁ ) (A ₂ ) in which the opposing surface of (2) is formed into an arcuate surface (4) and the cylindrical roller member (3) is interposed between the opposing arcuate surfaces is arranged vertically. Although the structure is adopted, this vibration damping device (A ') is configured to be swingable in any of left, right, front, back and front directions by a set of members.

That is, in this vibration damping device (A '), the facing surfaces of the upper and lower clamping members (1a) (2a) are formed in spherical concave portions (4a), and a spherical body (4a) is formed between the concave portions (4a) (4a). 3a) is interposed.

Then, the vibration damping devices (A ') are arranged at least at three places on the floor (C) on the uppermost floor of the building (B), and the lower clamping members (1a) of the respective vibration damping devices (A') are arranged. Fixed on the floor (C),
Place a weight member (A ₃ ) consisting of equipment such as an ice storage tank in a erected state between the upper clamping members (2a) and solidify it so that it has the same vibration cycle as the natural vibration cycle of the building (B). It is composed of.

The natural vibration period is set by the upper and lower clamping members (1a) (2
It can be determined by the above formula by the curved surface radius R of the recess (4a) and the radius r of the sphere (3a) in a). In this case, if the building (B) has a square cross section, the sixth and seventh As shown in the figure, when the radius R of the curved surface is formed to have the same radius of curvature in any direction, and the front width dimension and the side width dimension are different when the building (B) has a rectangular cross section, As shown in FIGS. 8 and 9, it is formed in a flat elliptical shape so that the larger dimension has a gentle curved surface and the smaller dimension has a steeper curved surface.

With this configuration, when an earthquake occurs or the building (B) vibrates in the front-back, left-right direction due to strong wind,
The weight member (A ₃ ) also starts oscillating with a phase delay of a predetermined cycle, the vibration energy of the building (B) is converted into the vibration energy of the weight member (A ₃ ), and the shaking of the building (B) is suppressed. It is something.

At this time, the weight member (A ₃ ) is rocked by the upper and lower pressing members (1a) (2a) relatively moving in the front-rear and left-right directions via the spherical body (3a).

Incidentally, in this vibration damping device (A '), the upper and lower ends of the damper (11a) made of steel rod as a damping device for various cycle oscillations comprising seismic floor (C) and the weight member (A ₃₎ Is connected and fixed between the facing surfaces of.

〔The invention's effect〕

As described above, according to the vibration damping device of the present invention, the roller member or the sphere is clamped between the concave curved surfaces formed on the opposing surfaces of the upper and lower clamping members of the damping mechanism on which the weight member is mounted and fixed. Since the vibration damping device is placed in a state, when the building where the vibration damping device is installed on the roof or the like swings due to an earthquake or strong wind, the weight member swings through the concave curved surface of the upper and lower clamping members or the spherical member. The vibration of the building can be reliably damped by moving it, and the front and rear and left and right shaking of the building can be absorbed by making the roller member or the sphere rollable in that direction, and the concave curved surface of the upper and lower clamping members can be absorbed. However, by setting the radius of the member or the sphere appropriately, the natural vibration cycle of the vibration damping device can be easily matched with the natural vibration cycle of the front, rear, left, and right directions of the building, and a highly accurate vibration damping device can be easily designed. To do Can.

Furthermore, not only is it economical to use equipment such as an ice storage tank installed in a building as a weight member, but it is also economical because it is mounted on the pinching member in a three-dimensional structure to make space effective. It can be used.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a simplified front view of the entire building in which a vibration damping device is installed, FIG. 2 is a simplified front view of the vibration damping device, and FIG. Front view, FIG. 4 is a perspective view showing a modified example of the vertical damping mechanism, FIG. 5 is a simplified front view showing another damping device of the present invention, FIG. 6 is a plan view of a pressing member, and FIG. FIG. 8 is a partial vertical sectional front view, FIG. 8 is a plan view showing a modified example of the pinching member, and FIG. 9 is a partial vertical sectional front view thereof. (A) …… Vibration damping device, (A ₁ ) (A ₂ ) …… Vibration damping mechanism,
(A ₃ ) …… weight member, (C) …… floor, (1) (2)
...... Upper and lower clamping member, (3) ...... Roller member, (4) …… Arc surface, (5) …… Rack, (6) …… Pinion, (10)
…… Intermediate clamping member, (11) …… Oil damper, (1a)
(2a) …… Upper / lower pressure member, (3a) …… Sphere, (4a) ……
Recess.

Claims (7)

[Claims] 1. A vibration damping device, which is installed on a floor of a building vibrating in a horizontal direction with respect to the ground surface, for damping the vibration of the building,
A lower damping mechanism is constructed by interposing a cylindrical roller member having a predetermined diameter that rolls in a state of being clamped by these circular arc surfaces between upper and lower clamping members having concave circular arc surfaces on the opposite surfaces. The roller members are fixed to at least three locations on the floor in the same direction, and the upper damping mechanism having the same structure as this lower damping mechanism is replaced by the cylindrical roller member as the roller member of the lower damping mechanism. A vibration damping device for a building, characterized in that the vibration damping devices are arranged in a direction orthogonal to each other and fixed on respective lower vibration damping mechanisms, and weight members are placed and fixed on these upper vibration damping mechanisms. 2. The vertical vibration damping mechanism is arranged such that one natural vibration cycle of the vertical vibration damping mechanism matches the natural vibration cycle of the building in the front width direction and the other natural vibration cycle of the vertical vibration damping mechanism matches the natural vibration cycle of the building in the lateral width direction. The vibration damping device for a building according to claim 1, wherein a radius of an arc surface of the upper and lower clamping members and a radius of the member are set. 3. A rack having the same degree of curvature is formed at both edges of the arcuate surface of the upper and lower clamping members in the vertical damping mechanism, and pinions that mesh with the rack are formed at both ends of the roller member. The building vibration damping device according to any one of paragraphs. 4. An arc-shaped groove is provided along the arc direction at the center of the arc surface of the upper and lower clamping members in the vertical damping mechanism, and a ring-shaped projection is fitted on the outer peripheral surface of the roller member. The building vibration damping device according to claim 1, wherein the vibration damping device is provided. 5. A vibration damping device, which is installed on a floor of a building vibrating in a horizontal direction with respect to the ground surface, for damping the vibration of the building,
At least three control mechanisms are provided on the floor of the building by interposing spheres that roll in a state of being clamped by the spherical surfaces of these recesses between the upper and lower clamping members that have opposing surfaces formed in spherical recesses. A vibration damping device for a building, characterized in that a weight member is mounted and fixed on these vibration damping mechanisms. 6. The spherical surfaces of the facing recesses of the upper and lower clamping members are formed into an elliptical shape in plan view, and the major axis and the minor axis thereof are unique to the long side direction and the short side direction in the plan shape of the building. The vibration damping device for a building according to claim 1, wherein the vibration damping device is set so as to match the cycle. 7. The vibration damping device for a building according to claim 1, further comprising a damper for absorbing vibration energy provided between the floor of the building and the weight member.