JP3207767B2 - Seismic isolation windproof structure of 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 seismic isolation and windproof structure for a structure.

[0002]

2. Description of the Related Art In a seismic isolation structure for a structure, a vibration of the structure caused by an earthquake is interposed between a foundation and the structure by interposing a seismic isolation support for movably supporting the structure in a horizontal direction. Reduced. Various devices are known as the seismic isolation support, such as a seismic isolation laminated rubber in which rubber and a steel plate are alternately laminated, and a combination of bearings, springs and dampers.

Generally, in this type of seismic isolation structure, the horizontal rigidity of the seismic isolation support is reduced, and the natural period of the vibration system including the structure and the seismic isolation support is made longer than the period of the horizontal vibration of the earthquake. This suppresses the vibration of the structure caused by the earthquake.

[0004] Generally, setting the horizontal rigidity of the seismic isolation support to be low means that the structure is easily displaced in the horizontal direction by wind force. For this reason, when the wind speed increases, the structure may vibrate and give occupants or the like discomfort.

For example, the seismic force acting on a building having a weight of 20 (ton) is 0.2 × 20 = 4 (ton) when the base shear coefficient is 0.2. On the other hand, the wind power is obtained by multiplying the wind receiving area by the wind pressure. For example, the wind receiving area of the building is 60 (m ² ), and the wind pressure is 0.147 (t).
on / m ² ), it is about 8.8 (ton), which is more than twice the seismic force. Therefore, it is understood that the displacement during the typhoon may be larger than the horizontal displacement of the building during the earthquake. The wind pressure was calculated from a formula determined by the Building Standards Law: wind pressure = 60 × h ^1/2 (h: height of the building).

In the conventional seismic isolation structure, in order to solve the problem caused by the strong wind, a lower hole and an upper hole which are vertically opposed to each other are provided on the foundation and the building, respectively. Stopping rods are inserted into the upper and lower holes to fix the foundation and the building in the horizontal direction, thereby preventing the building from swaying in a strong wind.

[0007]

However, in the above-described conventional wind-resistant structure, a person must insert a stop rod each time a strong wind occurs, so that the responsiveness to the occurrence of a strong wind is poor. In addition, when the strong wind ends, it is necessary to pull out the stop rod from the two holes, and it is troublesome to put the stop rod in and out.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and automatically stops the swaying of a structure in a strong wind to enhance the responsiveness to the generation of a strong wind, and reliably eliminates the responsiveness in the event of an earthquake. It is an object of the present invention to provide a seismic isolation and wind-resistant structure for a structure capable of obtaining an earthquake effect.

[0009]

The present invention has the following configuration to achieve the above object. That is, the invention of claim 1 detects a wind speed in a seismic isolation structure of a structure including a seismic isolation support interposed between a foundation and a structure to support the structure movably in a horizontal direction. Wind speed detecting means, earthquake detecting means for detecting an earthquake,
Displacement stopping means for restricting horizontal displacement of the structure
Wherein the displacement stopping means, when the wind speed detecting means detects the wind speed above a predetermined value, forcibly automatically stopping the horizontal displacement of the structure relative to the foundation, one
If the earthquake detection means detects an earthquake,
A seismic isolation and windproof structure of the structure, wherein the stop state is released .

According to a second aspect of the present invention, when the wind speed detecting means detects a wind speed equal to or more than a predetermined value, the displacement stopping means is maintained in an operating state for a time equal to or longer than a breathing interval of the wind. Or a seismic isolation windproof structure of the structure described in 2.

The displacement stopping means may include a lower hole and an upper hole which are provided on the foundation and the structure, respectively, and which are vertically opposed to each other, and the wind speed detecting means detects a wind speed of a predetermined value or more. A stop member that is inserted into both the lower hole and the upper hole to forcibly stop the horizontal displacement of the structure with respect to the foundation. .

Further, the displacement stopping means includes a solenoid disposed substantially coaxially with a central axis of the lower hole and the upper hole, and the stop member is provided with the solenoid by the solenoid. The upper hole may be inserted and removed.

Further, the displacement stopping means includes a plunger type solenoid disposed substantially coaxially with a central axis of the lower hole portion and the upper hole portion, and the stop member comprises a plunger of the plunger type solenoid. You may make it attach to a front-end | tip part and insert / remove the said lower hole part and the said upper hole part.

It is preferable that the solenoid is disposed below a structure. In the lower hole and the upper hole, the inner diameter of the hole on the front side of the stop member may be set to be sufficiently larger than the outer diameter of the stop member. Further, the tip of the stop member or the hole may be formed in a tapered shape. Further, the solenoid may be attached via an elastic body. In addition, the displacement stopping means can be set to a released state when a power failure occurs.

The wind speed detecting means can be selected from a rotary anemometer, a hot wire anemometer, a thermistor anemometer, an ultrasonic anemometer, and a means for detecting wind speed from wind noise.

According to the present invention, when a wind speed equal to or higher than a predetermined value is detected by the wind speed detecting means, the displacement stopping means automatically forcibly stops the horizontal displacement of the structure. Shaking of things can be stopped reliably and quickly, for example, when the structure is a building,
A comfortable living environment can be provided to residents and the like.

Further, since the displacement stopping means is released in the event of an earthquake, the structure can be displaced in the horizontal direction even during a normal earthquake and also when an earthquake and a strong wind occur at the same time. The seismic isolation effect can be reliably obtained by giving priority.

Further, since the displacement stopping means is kept in a state where the horizontal displacement of the structure is stopped for more than the breath of the wind (interval with the next wind), the displacement is kept constant until the strong wind completely stops. During the time, the swinging of the structure is stopped by the displacement stopping means.

Further, if the stop member is attached to the tip of the plunger of the plunger type solenoid,
Since the existing plunger type solenoid can be used with a minimum change, the displacement stopping means can be configured at low cost.

Further, if the solenoid is disposed below the structure, it is possible to prevent the solenoid from being exposed to rain, thereby improving the corrosion resistance of the displacement stopping means.

Further, the inner diameter of the hole on the front side of the stop member of the lower hole and the upper hole may be set to be sufficiently large, or the tip of the stop member or the shape of the hole may be tapered. The stop member can be smoothly inserted into the hole.

If the solenoid is mounted via an elastic body, a shear force is applied to the stop member from the lower hole and the upper hole in a strong wind or the like, and the stop member is tilted, so that an external force is applied inside the solenoid. However, since the external force is absorbed by the elastic body, it is possible to prevent the solenoid from being damaged.

Even if a power failure occurs, the displacement stopping means is in the released state, so that the structure can be horizontally displaced, the seismic isolation effect can be reliably obtained, and fail-safe is realized.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. In the present embodiment, the present invention is applied to the seismic isolation structure having the seismic isolation laminated rubber. However, the present invention is not limited to the application to the seismic isolation structure using the seismic isolation laminated rubber. Widely applicable to other seismic isolation structures such as those using a combination of bearings, springs and dampers, rolling bearings, sliding bearings or composite bearings with these and seismic isolation laminated rubber It is.

FIG. 1 is a side view schematically showing a seismic isolation windproof structure of the present embodiment, and is a view showing a normal state. FIG.
FIG. 3 is a side view schematically showing the seismic isolation wind-resistant structure, showing a state in a strong wind.

As shown in FIG. 1, the seismic isolation structure of this embodiment supports the building 4 so as to be movable in the horizontal direction by being interposed between the foundation 2 and the building (an example of the structure) 4. A seismic isolation laminated rubber (an example of a seismic isolation support) 6, a wind speed detecting means 8 for detecting a wind speed, and a building 4 for the foundation 2 when the wind speed detecting means 8 detects a wind speed equal to or more than a predetermined value. Stopping means 1 for forcibly and automatically stopping horizontal displacement of
0.

The seismic isolation laminated rubber 6 is disposed, for example, at each of the four corners of the bottom surface of the building 4 and is formed by alternately laminating an elastic layer 6a made of rubber or the like and a rigid plate layer 6b made of a steel plate or the like. It is. An upper flange 6c and a lower flange 6d, which are fixed to the bottom surface of the building 4 and the foundation 2, respectively, are provided at upper and lower ends of the seismic isolation laminated rubber 6, respectively.

The wind speed detecting means 8 is installed on the roof of the building 4 as shown in FIG. 1, for example, and comprises a rotary anemometer, a hot wire anemometer, a thermistor anemometer, an ultrasonic anemometer, or a wind anemometer. It comprises means for detecting wind speed from noise. Examples of the rotary anemometer include a bowl (cup) type or windmill type anemometer, an impeller current meter, and the like. Further, as a specific example of the means for detecting the wind speed from the wind noise, there is a device for detecting a wind speed by detecting a whistle sound generated by a stretched line vibrating due to wind.

The displacement stopping means 10 includes a lower hole 12a and an upper hole 14a which are provided on the foundation 2 and the building 4 and which are vertically opposed to each other, and a wind speed detecting means 8 has a predetermined value (for example, a wind speed of 10 m / s). A stop rod (an example of a stop member) that is inserted into both the lower hole 12a and the upper hole 14a to forcibly stop the horizontal displacement of the building 4 with respect to the foundation 2 when the above wind speed is detected. 16.

In the present embodiment, the lower hole 12a is a through hole provided in the lower horizontal plate 12 provided on the foundation 2 and penetrating in the vertical direction, and the upper hole 14a is formed in the lower horizontal plate 12a.
Are through holes provided in the upper horizontal plate 14 protruding from the side surface of the building 4 so as to face the building.

The stop rod 16 functions as a plunger which is inserted into and removed from the lower hole 12a and the upper hole 14a by a solenoid 18 arranged substantially coaxially with the central axis of the lower hole 12a and the upper hole 14a. I do. The stop rod 16 is supported by the foundation 2 via a tension spring 20 and is located below the upper surface of the lower horizontal plate 12 in a normal state (no wind or a state of a wind speed equal to or lower than a predetermined value).

The solenoid 18 is disposed below the lower horizontal plate 12. When the wind speed detecting means 8 detects a wind speed equal to or higher than a predetermined value, the switch 22 is turned on by a signal from the wind speed detecting device 8. The stop bar 16 is repelled by a magnetic force and is pushed upward.
Further, once the switch 22 is turned on, the switch 22 is controlled so that the ON state of the switch 22 is maintained at least for an interval of wind breathing (for example, about 5 to 10 seconds). Further, when an earthquake and a strong wind occur simultaneously, a signal is received from an earthquake detecting means 24 for detecting an earthquake, the switch 22 is turned off regardless of a signal from the wind speed detecting means 8, and the stop rod 16 is connected to the lower hole. It is controlled to come off from the portion 12a and the upper hole portion 14a. Note that the solenoid 18 may be either an AC solenoid or a DC solenoid.

The operation of the embodiment having the above configuration will be described. First, when there is no wind or when the wind speed is less than a predetermined value, the switch 22 is in the OFF state, no current flows through the solenoid 18, and the stop rod 16 is located below the lower horizontal plate 12. When a strong wind blows from this state and a wind speed equal to or higher than a predetermined value is detected by the wind speed detecting means 8 and no earthquake is detected, the switch 22 is turned on, and current flows through the solenoid 18. As a result, the stop rod 16 is inserted into both the lower hole 12a and the upper hole 14a against the spring force of the tension spring 20 by the magnetic force received from the solenoid 18 as shown in FIG.
And the building 4 are fixed in the horizontal direction. This switch 22
Is set so as to be maintained for a time equal to or greater than the interval between the breaths of the wind, whereby the stop rod 16 keeps the lower hole 12a and the upper hole 14 until the strong wind completely stops.
The horizontal displacement of the building 4 with respect to the foundation 2 is stopped while being maintained in a state of being inserted through both of them.

When the state in which the strong wind stops and the wind speed is lower than the predetermined value continues sufficiently longer than the breathing interval of the wind, the switch 22 is controlled to be turned off, and the current to the solenoid 18 is cut off. Then, the stop rod 16 moves downward due to its own weight and the restoring force of the tension spring 20, and comes out of the lower hole portion 12a and the upper hole portion 14a to be moved downward.
Return to the original position below. As a result, the building 4 can be displaced in the horizontal direction with respect to the foundation 2, and the seismic isolation structure is in a normal state in which the seismic isolation effect can be obtained.

According to the present embodiment acting as described above,
Since the horizontal displacement of the building 4 is forcibly and automatically stopped by the insertion of the stop rod 16 by the solenoid 18, the shaking of the building 4 can be reliably and promptly prevented in a strong wind, so that the A comfortable living environment can be provided.

Even if an earthquake occurs when a strong wind is blowing, the switch
Since 2 is turned off, the stop rod 16 always comes off the lower hole 12a and the upper hole 14a during an earthquake. Therefore, even during strong winds, the building 4
Can be displaced in the horizontal direction, and the seismic isolation effect can be reliably obtained by giving priority to the seismic isolation function.

Further, since the stop rod 16 is inserted into the lower hole 12a and the upper hole 14a more than the breath of the wind, the stop rod 1 is kept for a certain period of time until the strong wind is completely stopped.
6, the shaking of the building 4 can be stopped.

When current does not flow through the solenoid 18, the stop rod 16 is always removed from the lower hole 12a and the upper hole 14a. Can be displaced. Therefore, even if an earthquake occurs during a power outage, the seismic isolation effect can be reliably obtained,
Fail safe can be realized.

This embodiment is a preferred embodiment of the present invention, and the technical scope of the present invention is not limited to this embodiment. For example, as in a modified example of the embodiment shown in FIGS. 3 and 4, in the basic configuration of the embodiment, the stop bar 16 suspended from the support plate 26 via the tension spring 20 is provided near the upper side of the upper horizontal plate 14. The stop rod 16 is installed and the solenoid 1 is placed above the lower hole 12a and the upper hole 14a.
8 may be used for suction. The operation and effect of this modified example are the same as those of the above-described embodiment, and a description thereof will be omitted.

Further, as in the modification shown in FIG. 5, the displacement stopping means 10 is disposed below the building 4 (between the bottom surface of the building 4 and the foundation 2), and the stop rod 16 is formed in a plunger shape. It can be provided at the tip of the plunger 28a of the solenoid 28.

The plunger-type solenoid 28 is a well-known solenoid such as a push-type tubular solenoid or a push / pull-type solenoid having a built-in round bar-shaped plunger 28a that can move up and down, as shown in FIG. The flange portion 28b on the outer periphery of the upper end is the lower support plate 1
2 is fastened to the back surface of the base 2 with a bolt 32 via a rubber washer (an example of an elastic body) 30. As shown in FIG. 5, the stop rod 16 has a cylindrical portion 16a at the lower portion which fits around the upper end of the plunger 28a, and operates integrally with the plunger 28a. It is inserted into and removed from the portion 12a and the upper hole portion 14a.

According to the modification shown in FIG. 5, the tip of the plunger 28a of the existing plunger type solenoid 28 only needs to be inserted into the cylindrical portion 16a of the stop rod 16, so that the existing plunger type solenoid 28 can be minimized. Therefore, a remarkable effect that the displacement stopping means 10 can be configured at a low cost can be obtained.
Also, since the solenoid 28 is arranged under the building 4,
Since the solenoid 28 can be prevented from being exposed to rain,
Corrosion resistance of the displacement stopping means 10 can be improved.
In addition, since the solenoid 28 is attached via the rubber washer 30, as shown in FIG. 7, when the strong wind is applied, a shear force is applied to the stop rod 16 from the lower hole 12a and the upper hole 14a, and the stop rod 16 tilts. Therefore, even if an external force is applied to the inside of the solenoid 28, the external force can be absorbed by the rubber washer 30 and damage to the solenoid 28 can be prevented.

Further, as shown in FIG.
If the inner diameter D1 of the upper hole 14a, which is the forward side of the stop rod 16 of the upper hole 14a and the upper hole 14a, is set to be sufficiently larger than the outer diameter D2 of the stop rod 16, the building can be constructed when a strong wind occurs. Even if the center of the upper hole 14a is slightly displaced from the center of the stop rod 16 with the horizontal displacement of 4, the stop rod 16 can be smoothly inserted into the upper hole 14a. Also, as shown in FIG. 9, by forming the distal end portion 16b of the stop rod 16 in a tapered shape, or by forming the shape of the upper hole portion 12a in a tapered shape, the stop rod 16 can be similarly smoothly moved.
Can be inserted.

[0044]

As described above, according to the present invention, in a seismic isolated windproof structure of a structure, the sway of the structure can be automatically stopped at the time of strong wind, and the responsiveness to the generation of strong wind can be improved. Moreover, even in the event of a strong wind or a power outage, a seismic isolation effect can be reliably obtained during an earthquake.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing a seismic isolation and windproof structure of the present embodiment, showing a normal state.

FIG. 2 is a side view schematically showing the seismic isolation wind-resistant structure of the present embodiment, showing a state in a strong wind.

FIG. 3 is a side view schematically showing a seismic isolation wind-resistant structure according to a modification of the present embodiment, showing a normal state.

FIG. 4 is a side view schematically showing a seismic isolation wind-resistant structure according to a modified example of the embodiment, and is a diagram showing a state at the time of strong wind.

FIG. 5 is a side view schematically showing a displacement stopping means according to a modification of the embodiment, and is a diagram showing a state at the time of strong wind.

FIG. 6 is an enlarged view of a portion A in FIG.

FIG. 7 is a side view showing a peripheral structure of a stop rod according to a modified example of the embodiment, and is a view showing a state in which the stop rod is inclined during strong wind.

FIG. 8 is a side view showing a peripheral structure of a lower hole and an upper hole according to a modification of the embodiment.

FIG. 9 is a side view showing a peripheral structure of a stop rod according to a modification of the embodiment.

[Explanation of symbols]

 2 foundation 4 building (example of structure) 6 seismic isolation laminated rubber (example of seismic isolation support) 8 wind speed detecting means 10 displacement stopping means 12a lower hole 14a upper hole 16 stop rod (example of stop member) 16a Tip 18 Solenoid 28 Plunger type solenoid 28a Plunger 30 Rubber washer D1 Inner diameter of upper hole D2 Outer diameter of stop rod

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-77232 (JP, A) JP-A-59-61662 (JP, A) JP-A 8-226253 (JP, A) (58) Survey Field (Int.Cl. ⁷ , DB name) E04B 1/34 E04H 9/02 331 F16F 15/04

Claims (2)

(57) [Claims] A wind speed detecting means for detecting a wind speed in a seismic isolation structure of a structure having a seismic isolation support interposed between a foundation and a structure to support the structure movably in a horizontal direction. And earthquake detection means for detecting an earthquake;
Displacement stopping means for restricting horizontal displacement of the structure
Wherein the displacement stopping means, when the wind speed detecting means detects the wind speed above a predetermined value, forcibly automatically stopping the horizontal displacement of the structure relative to the foundation, whereas, the ground
When the earthquake detection means detects an earthquake, the automatic stop state is released.
A seismic isolation wind-resistant structure of a structure characterized by being excluded . 2. The structure according to claim 1 , wherein said displacement stopping means is maintained in an operating state for a time equal to or greater than a breathing interval when said wind speed detecting means detects a wind speed equal to or greater than a predetermined value. Seismic isolation and windproof structure for objects.