JP3343336B2 - Sway control device and base-isolated structure in base-isolated structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a restraint device for preventing a building having a seismic isolation device from shaking, and more particularly to a restraint device.
Seismic isolation device has a seismic isolation effect against horizontal external forces due to large earthquakes, and a seismic isolation structure with a vibration suppression device that does not shake against small earthquakes or strong winds About.

[0002]

2. Description of the Related Art Conventionally, seismic isolation structures having seismic isolation devices are:
A seismic isolation device is installed between the foundation of the structure and the ground, so that in the case of a large earthquake, vibration is not directly applied to the structure between the ground and the ground.

On the other hand, when the structure is relatively light, the structure is not fixed under certain conditions in order to prevent the structure from shaking due to a small earthquake or strong wind and to improve the livability of the structure. It is known that a means for preventing movement in the horizontal direction is provided.

For example, as a conventional example, as shown in FIG. 7, a seismic isolation device 4 and a movement prevention device 20 are provided between a foundation 2b of a structure 2 and a surface of a ground 3 below the foundation 2b. One is known (JP-A-9-310532). With this structure, the swing of the structure 2 is prevented against the minute external force by the frictional force between the foundation and the upper surface of the movement preventing device.

As a conventional example, as shown in FIG. 8, between a foundation 2b of a structure 2 and a ground 3 underneath,
A device provided with a seismic isolation device 4 and a roll prevention device 21 is known (JP-A-11-30217). This structure prevents the structure from swaying against a small external force due to the frictional force between the upper sliding plate 21a and the lower sliding plate 21b of the anti-rolling device. It comes off and does not come into contact, so that no frictional force is generated, and only the seismic isolation device works.

[0006]

However, in the above-mentioned prior arts, a means for preventing lateral movement is provided between the foundation of the structure and the ground surface under the structure.
It is a means of resisting external force due to frictional force. Therefore,
In addition to the need to replace parts due to wear due to use, there is a lack of certainty that the structure is surely prevented from moving in the horizontal direction. Also, since the lateral movement preventing means is provided under the structure, even if the work space under the structure can be entered by a human, it is not sufficient as a human working environment, and many lateral movement preventing means are installed. In such a case, it takes time and effort, and it is inevitable that a heavy burden is imposed on the operator. . The vibration suppression device and the seismic isolation structure in the seismic isolation structure according to the present invention are proposed to solve such a problem.

[0007]

The gist of the present invention for solving the above-mentioned problems of the shake suppressing device in the seismic isolation structure according to the present invention is as follows: the side wall of the structure having the seismic isolation device, and the ground side wall around the structure. substantially a removable sway suppression device which is horizontally laid, rocking Re suppression device, around the other end between the
It is rotatable in a substantially vertical plane and has one end attached.
Locked detachably engaged, when the structure is moved to a predetermined value or more in the horizontal direction, the locked state of at least the one end portion, the relative free movement in the horizontal direction with respect to the surrounding ground of the structure It is to be released in a state where it can be done.

[0008] Further, according to the present invention, there is provided a vibration suppressing device for a seismic isolation structure, comprising: a side wall of a structure having the seismic isolation device;
Removable that is installed almost horizontally between the ground and the side wall of the ground
A sway suppressing device, wherein the sway suppressing device has the structure described above.
If an object moves more than a predetermined amount in the horizontal direction, at least
The state of locking at one end is the surrounding ground of the structure.
Can move freely in the horizontal direction relative to
Together is released by, the body portion thereof is constituted by divided bodies are connected via a coupler, that the entire length of the body portion is in retractable by said coupler
is there.

[0009] The gist of the seismic isolation structure according to the present invention is that a required number of the vibration suppression devices according to the present invention are provided between the side wall of the structure having the seismic isolation device and the ground side wall around the structure. It is installed.

[0010] According to the vibration control device and the seismic isolation structure of the seismic isolation structure of the present invention, the horizontal vibration of the structure can be reliably prevented by the horizontal vibration control device. Further, since the sway suppressing device is installed between the side wall of the structure and the side wall of the ground, the working space for the mounting work and the like is not restricted, and the working environment of the worker is improved.

[0011] In the event of a horizontal movement of a predetermined amount or more in the event of a large earthquake, the sway suppressing device naturally falls down due to gravity, and the locked state is released. There is no need to provide it, and it can be configured at a low cost with a simple structure, and the work of erection of the swing suppression device horizontally again is easy and hassle-free. In addition, since the swing suppressing device has means for expanding and contracting the entire length, the work of horizontally laying the device can be further facilitated. In the present invention, the horizontal movement of the building body is, for example, as shown in FIG.
Since the steel material or the like does not work effectively up to about 0 mm to 30 mm, the building is held down by the shaking suppressing device, and for further horizontal movement, the shaking suppressing device is disengaged and the seismic isolator for the building operates. Conversely, a horizontal movement of about 10 mm to 30 mm does not operate the building seismic isolation device.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a vibration suppression device and a seismic isolation structure in a seismic isolation structure according to the present invention will be described with reference to the drawings. To facilitate understanding of the invention, portions corresponding to the conventional example will be described with the same reference numerals as in the conventional example.

FIG. 1 is a perspective view showing a vibration suppression device 1 in a seismic isolation structure.
As shown in FIG. 3 to FIG. 3, a substantially horizontal bridge is provided between a side wall 2a of a structure provided with a seismic isolation device 4 between the foundation of the structure 2 and the upper surface of the ground 3, and a side wall 3a of the ground 3. It is provided as.

As a first embodiment of the structure, the sway suppressing device 1 is made of a metal having a predetermined length (for example, L = 1 m to 1.2 m), which is buried in a skeleton by exposing the surface side to the side wall 2a of the structure. ) Slide plate 5 is provided. The surface side of the slide plate 5
A curved surface shape 5a is formed with a desired radius of curvature in the vertical direction. At its center, a recess 5b is formed in a required range in the left-right direction as shown in FIG. This is to deal with the movement of the structure 2 in the left-right direction.

A projection 6 is provided so as to engage with the concave portion 5b of the sliding plate 5, and a curved portion 7 along the curved shape 5a.
A tip 7 having a is provided.

Behind the tip 7, there is provided a laminated rubber body 8 in which an elastic body of natural rubber or high-damping rubber is laminated, and behind it is a connecting body 11 in which metal plates 9, 10 are fastened with bolts and nuts. is there.

Behind the connection plate 11, a steel pipe 12 fixed to the metal plate 10 is provided, and a screw portion is engraved at the rear end of the steel pipe 12, and the screw portion is provided on the inner peripheral wall surface of the cylindrical body. A metal coupler 13 in which a thread groove is engraved is screwed into a required portion.

A steel pipe 14 is screwed and connected to the rear end of the coupler 13 similarly to the steel pipe 12. At the rear end of the steel pipe 14, a support plate 15 and the support plate 15
And a rotation support plate 16 integrated in a T-shape.

The rotation support plate 16 is provided with a through hole at the rear end thereof, and is pinched by a mounting base 17 fixed to the ground side wall 3a and connected to a pin 18.

The sway suppressing device 1 according to the first embodiment having the above-described structure can be used even in the event of a small earthquake or strong wind.
Rolling of the structure 2 directly in the horizontal direction is prevented.
In this way, by resisting the lateral movement of the structure 2 in the axial direction of the swing suppressing device 1, the lateral movement preventing effect is reliably exhibited.

In the case of a large earthquake, for example, FIG.
(B) As shown in FIG.
1, the laminated rubber body 8 in the one-side sway suppressing device 1 is compressed by the structure 2, the structure 2 moves relatively largely in the horizontal direction relative to the ground 3, and the other-side sway suppressing device 1 Is released from the locking state between the projection 6 of the tip 7 and the recess 5b of the slide plate 5, and falls naturally by gravity. Thus, the structure 2 is supported only by the seismic isolation device 4, and the seismic isolation effect is exhibited.

After the earthquake has subsided, the side walls 2a and 3a
When the worker enters the space, the coupler 13 is rotated in a predetermined direction to temporarily reduce the length of the main body portion of the shake suppressing device 1, lifted it horizontally, and rotated the coupler 13 in a predetermined direction to rotate the main body. The portion is extended, the concave portion 5b and the projection 6 are engaged with each other, and the swing suppressing device 1 is installed in a substantially horizontal state between the side wall 2 and the side wall 3a. Since the worker can work in a work space without any restrictions in the upward direction, the work is less burdensome on the physical body than in the conventional example and the work is easy.
In addition, the installation work and the removal work of the swing suppression device 1 are also facilitated.

The sway suppressor according to the second embodiment is configured such that the sway suppressor 1 shown in FIG. 1 is reversed, the mounting base 17 is provided on the side wall 2a, and the slide plate 5 is provided on the side wall 3a. It is. According to the second embodiment, the same operation and effect as those of the first embodiment can be obtained.

The sway suppressing device according to the third embodiment has a structure in which the steel pipes 12 and 14 are integrated, omitting the coupler 13 in the sway suppressing device 1 of the first embodiment. Even with this, although the main body of the shake suppressing device cannot be expanded or contracted, the same operation and effect as in the first embodiment can be obtained in other cases.

As a fourth embodiment, for example, the laminated rubber body 8 in the sway suppressing device 1 of the first embodiment is replaced with another synthetic resin member, or an oil damper device is used instead of the laminated rubber body. It is something that can be done.

As described above, the sway suppressing device of the present invention is essentially provided with a resistance member having its axis aligned in parallel with the horizontal direction in which the structure moves laterally. It is only necessary to prevent the movement and the movement of the structure beyond a certain level, so that the structure is naturally released and only the seismic isolation device operates.

In addition, in each of the above embodiments, a device for rotating the control device, the main body of the earthquake measuring device and the main body of the shake suppressing device upward or downward from the horizontal state, for example, as shown in FIG.
As shown in (1), the drive device is operated by the control device, and the swing suppressing device 1 is forcibly pulled up by the turning device 19 such as an air cylinder, or the entire swing suppressing device is moved downward. Although it is also proposed to provide an additional device for sliding the device, it is unavoidable that the cost is increased, and the above embodiments are the best ones.

Furthermore, by installing the required number of the above-mentioned sway suppressing devices between the side wall 2a of the structure 2 having the seismic isolation device and the ground side wall 3a around the structure 2, excellent livability can be obtained. This is the seismic isolation structure according to the present invention.

[0029]

As described above, the sway suppressing device in the seismic isolation structure according to the present invention is provided substantially horizontally between the side wall of the structure having the seismic isolation device and the ground side wall around the structure. A detachable swing suppressing device that is installed, the swing suppressing device being rotatable in a substantially vertical plane about the other end.
And one end is detachably locked, and when the structure is moved in a horizontal direction by a predetermined amount or more, at least
Since the locked state at the one end is released in a state in which the structure can be relatively freely moved in the horizontal direction with respect to the surrounding ground, the structure can be surely secured by the swing suppressing device installed in the horizontal direction. Rolling can be prevented. Further, since the sway suppressing device is installed between the side wall of the structure and the ground side wall, the work space is not restricted, and an excellent effect that the work environment of the worker is improved is provided. To play. Furthermore, while being rotatable in a substantially vertical plane around the other end , the one end
Since the portion is detachably locked, no special releasing means is required, and the device naturally falls due to gravity, thereby achieving an excellent effect that the object can be achieved at low cost.

[0030]

The main body portion of the vibration suppressing device is constituted by a divided body connected via a coupler, and the entire length of the main body portion can be expanded and contracted by the coupler. After that, there is an excellent effect that the work of erection horizontally is facilitated again.

The seismic isolation structure of the present invention is provided between a side wall of a structure having a seismic isolation device and a ground side wall around the structure.
Since the required number of the sway suppressing devices are installed, an excellent effect of enhancing the livability without lateral sway due to an external force due to a small earthquake or a strong wind is provided.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a use state of a swing suppression device 1 according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged front view of the swing suppression device 1 according to the present invention.

FIG. 3 is a plan view of the swing suppression device 1 according to the present invention.

FIG. 4 is a plan view (a) and a cross-sectional view (b) showing the arrangement of the swing suppression device 1 according to the present invention.

FIG. 5 is a schematic explanatory view showing the configuration of a rotation device 19, a drive device, and a control device as an embodiment in which the swing suppression device 1 according to the present invention is forcibly removed.

FIG. 6 is an explanatory diagram showing a change in an equivalent damping constant for each response amplitude.

FIG. 7 is a schematic explanatory view of a conventional example.

FIG. 8 is a schematic explanatory view of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Sway suppressing device, 2 structure, 2a side wall, 3 ground, 3a side wall 4 Seismic isolation device, 5 slide plate, 5b recess, 6 protrusion, 7
Tip, 8 laminated rubber body, 9, 10 metal plate, 11
Connection, 12 steel pipe, 13 coupler, 14 steel pipe, 1
5 Support plate, 16 rotation support plate, 17 mounting base, 18 pins.

Claims (3)

(57) [Claims] 1. A detachable swing suppressing device which is installed substantially horizontally between a side wall of a structure having a seismic isolation device and a ground side wall around the structure, wherein the shake suppressing device comprises: Turn in a substantially vertical plane around the other end
One end with a freely moving is engaged detachably, in the case where the structure is moved to a predetermined value or more in the horizontal direction, the locked state of at least the one end, a horizontal direction with respect to the surrounding ground of the structure A vibration-reducing device in a seismic isolation structure, characterized in that the vibration-reducing device is released in a state where relative free movement is possible. 2. A detachable swing suppression device which is installed substantially horizontally between a side wall of a structure having a seismic isolation device and a ground side wall around the structure, wherein the shake suppression device comprises: When the structure moves more than a predetermined amount in the horizontal direction, the locked state at least at one end is released in a state where the structure is allowed to relatively freely move in the horizontal direction with respect to the surrounding ground, and A vibration suppression device in the seismic isolation structure , characterized in that the main body portion is constituted by a divided body connected via a coupler, and the entire length of the main body portion is made expandable and contractable by the coupler. 3. The required number of sway suppressing devices according to claim 1, 2 is installed between a side wall of a structure having a seismic isolation device and a ground side wall around the structure. A seismic isolation structure characterized by the following.