JP6716946B2 - Seismic isolation device - Google Patents

Description

The present invention relates to a seismic isolation device that is applied to a structure such as a three-dimensional warehouse, a boiler steel frame, a three-dimensional parking, a cargo handling facility, etc. to reduce the sway of the structure.

Generally, a three-dimensional warehouse has a configuration in which a plurality of racks (shelf) are three-dimensionally assembled by using a plurality of steel columns and a plurality of stages of steel beams. In the event of a large-scale earthquake, the three-dimensional warehouse may be damaged, and the earthquake may cause the load stored in the rack of the three-dimensional warehouse to drop and damage the load. It is considered that the warehouse will be equipped with seismic isolation devices to deal with the earthquake.

As a seismic isolation device for a pillar of a three-dimensional warehouse, there is one provided with a seismic isolation device made of laminated rubber between the lower ends of a plurality of pillars constituting the three-dimensional warehouse and the foundation (Patent Document 1). By the way, if a seismic isolation device using laminated rubber is provided at the lower end of each pillar of a three-dimensional warehouse in which a large number of pillars are provided as in Patent Document 1, it is necessary to add a foundation and the laminated rubber is relatively expensive. Therefore, there was a problem that the equipment cost of the three-dimensional warehouse increased. In addition, the pillar of the three-dimensional warehouse is cut in the middle of the upper and lower parts, the lower ends of the upper two pillars are connected by the horizontal first horizontal member, and the lower two pillars corresponding to the upper two pillars are connected. By connecting the upper end of the column with a horizontal second horizontal member engageable with the first horizontal member, the first horizontal member and the second horizontal member are slid in the longitudinal direction via a low friction member. In some cases, it is possible to connect the first horizontal member and the second horizontal member with a viscoelastic body (Patent Document 2).

JP, 2006-104883, A JP, 2013-039989, A

However, in Patent Document 2, since it is necessary to provide the first horizontal member and the second horizontal member, and further to provide a viscoelastic body that connects the first horizontal member and the second horizontal member, the structure is There was a problem that it became complicated and the equipment cost of the three-dimensional warehouse increased.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a seismic isolation device capable of isolating a sway acting on a structure with a simple configuration.

The present invention is a seismic isolation column that is tiltably disposed between an upper member and a lower member and has overhangs formed at upper and lower ends,
An upper restraint member that restrains an overhang formed at the upper end of the seismic isolation column so as not to move in the horizontal direction with respect to the upper member,
A lower restraint member that restrains the overhang formed at the lower end of the seismic isolation column so as not to move in the horizontal direction with respect to the lower member,
At least one of the functions of the damper element and the spring element, the damping element or spring element between the between the lower member and MenShinhashira or said upper member and MenShinhashira is interposed so as to be located The present invention relates to a seismic isolation device having a connecting body.

In the seismic isolation device, a fixed connecting member that extends and fixes a space between the seismic isolation columns in a direction orthogonal to a longitudinal direction of the seismic isolation column,
Inclination of the seismic isolation column is allowed in a direction orthogonal to a surface formed by the seismic isolation column and the fixed connecting member, and in a direction along a surface formed by the seismic isolation column and the fixed connecting member. May be configured such that the seismic isolation column is prevented from tilting.

In this case, a tapered surface having a downward slope from the center side to the width end side is provided at both width ends in the direction in which the inclination of the upper end surface of the overhang formed at the upper end of the seismic isolation column is allowed. Is formed, and both width end portions in the direction in which the inclination at the lower end surface of the overhanging portion formed at the lower end portion of the seismic isolation column is allowed have a taper that becomes an upward slope from the center side to the width end side. A surface may be formed.

In the seismic isolation device, the connecting body may be a fluid pressure damper.

In the seismic isolation device, the connecting body may be a coil spring.

According to the seismic isolation device of the present invention, it is possible to obtain an excellent effect that the vibration acting on the structure can be isolated with a simple structure.

It is a front sectional view showing an example of a seismic isolation device of the present invention. It is a sectional side view which shows the Example of the seismic isolation apparatus of this invention. It is a plane sectional view which shows the Example of the seismic isolation apparatus of this invention, Comprising: It is a III-III sectional view of FIG. It is a front sectional view showing a state at the time of a large-scale earthquake occurrence in an example of a seismic isolation device of the present invention. FIG. 6 is a front cross-sectional view showing an example in which a coil spring is used as a connecting body instead of a fluid pressure damper in the embodiment of the seismic isolation apparatus of the present invention. (A) is a front view of a three-dimensional warehouse which is an example of a structure to which the seismic isolation device of the present invention is applied, and (b) is a side view.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 6 show an embodiment of the seismic isolation device of the present invention.

6(a) and 6(b) show a three-dimensional warehouse that is an example of a structure to which the seismic isolation device of the present invention is applied. The three-dimensional warehouse 100 as the structure is composed of a plurality of steel pillars 1 By having a plurality of stages of steel beams 2, a plurality of racks 3 (shelves) are three-dimensionally assembled. The three-dimensional warehouse 100 is erected so as to sandwich the stacker crane 4, has a length extending along the traveling direction of the stacker crane 4, and is stored in a direction orthogonal to the traveling direction of the stacker crane 4. It has a width that corresponds to the size of the load and is shorter than the length. The plurality of pillars 1 forming the three-dimensional warehouse 100 have high strength to support the weight of the load stored in the rack 3.

Then, the seismic isolation device 5 of the present invention is provided on the plurality of pillars 1 constituting the three-dimensional warehouse 100 of FIG. As shown in FIG. 6, the seismic isolation device 5 is provided at the same height position of the pillar 1 provided in the three-dimensional warehouse 100. The seismic isolation device 5 is preferably installed at a height position of about 1/3 to 1/2 from the top in order to prevent the locking behavior of the entire three-dimensional warehouse 100 above the seismic isolation device 5. Thus, even if the seismic isolation device 5 is installed above the three-dimensional warehouse 100, the seismic isolation effect reduces the vibration above the seismic isolation device 5, resulting in the seismic isolation device 5 being below the seismic isolation device 5. The inventors of the present invention have found that the sway of the structure on the side is also reduced.

In the case of the present embodiment, the seismic isolation device 5 is provided with a seismic isolation column 6, an upper restraint member 7, a lower restraint member 8 and a connecting body 9, as shown in FIGS.

The seismic isolation column 6 is disposed between the horizontal flange 1A as an upper member and the horizontal flange 1B as a lower member so as to be tiltable via the upper restraining member 7 and the lower restraining member 8. There is. Flange 10 and flange 11 are formed at the upper and lower ends of the seismic isolation column 6 as overhangs. The horizontal flange 1A as the upper member is provided at the lower end of the column 1 located above the seismic isolation column 6, and the horizontal flange 1B as the lower member is the column 1 located below the seismic isolation column 6. Is provided at the upper end of the. The column 1 and the seismic isolation column 6 are hollow square steel materials having a rectangular horizontal cross section, but are not limited to the square steel materials, and H-shaped steel materials, I-shaped steel materials, and Z-shaped steel materials. It may be steel or cylindrical steel.

The upper restraint member 7 restrains the flange 10 as an overhang formed at the upper end of the seismic isolation column 6 from horizontally moving relative to the horizontal flange 1A as the upper member. Is. Further, the upper restraint member 7 has a stopper portion 7a for limiting an inclination angle of the seismic isolation column 6 formed at a lower end of the horizontal restraint portion 7b, so that the seismic isolation column 6 is tilted when the seismic isolation column 6 is inclined. The flange 10 is constrained at a position where the tilt angle is smaller than the limit tilt angle position where it can return to its original position by its own weight without falling.

The lower restraint member 8 restrains the flange 11 as an overhang formed at the lower end of the seismic isolation column 6 so as not to move horizontally with respect to the horizontal flange 1B as the lower member. belongs to. Further, the lower restraining member 8 has a stopper portion 8a for limiting the inclination angle of the seismic isolation column 6 formed at the upper end of the horizontal constraining portion 8b, so that the seismic isolation column 6 is tilted. The flange 11 is constrained at a position where the tilt angle is smaller than the limit tilt angle position where 6 can return to the original position by its own weight without falling.

The connecting body 9 is a fluid pressure damper 9a such as a hydraulic damper having a function of a damping element, and includes a beam 2 as a lower member extending so as to connect the lower surfaces of the horizontal flanges 1B and 1B and a seismic isolation column 6. It is interposed between. Instead of the fluid pressure damper 9a, the connecting body 9 may be a coil spring 9b having a function of a spring element as shown in FIG. As the connecting body 9, both the fluid pressure damper 9a shown in FIG. 1 and the coil spring 9b shown in FIG. 5 may be used. Further, instead of the beam 2 as the lower member, at least one of a damping element and a spring element is provided between the beam 2 as an upper member extending so as to connect the upper surfaces of the horizontal flanges 1A and 1A and the seismic isolation column 6. You may interpose the coupling body 9 which has the function of.

As shown in FIG. 2 and FIG. 3, the seismic isolation columns 6 are fixed to each other by a fixed connecting member 12 extending in a direction orthogonal to the longitudinal direction of the seismic isolation columns 6, and the seismic isolation columns 6 and the fixed connection. Inclination of the seismic isolation column 6 is allowed in a direction (width direction of the three-dimensional warehouse 100) orthogonal to the surface formed by the material 12 and a surface formed by the seismic isolation column 6 and the fixed connecting member 12. The seismic isolation column 6 is prevented from tilting in the direction along the (depth direction of the three-dimensional warehouse 100).

As shown in FIG. 1, from the center side to the width end side, both width ends in the direction in which the inclination of the upper end surface of the flange 10 as an overhang formed at the upper end of the seismic isolation column 6 is allowed. A tapered surface 10a having a downward slope is formed, and both width end portions in a direction in which the inclination at the lower end surface of the flange 11 as an overhanging portion formed at the lower end portion of the seismic isolation column 6 is allowed, The tapered surface 11a is formed so as to have an upward slope from the center side toward the width end side.

As shown in FIG. 3, the flange 10 and the flange 11 of the seismic isolation column 6 are rectangles having long sides and short sides, the long sides are arranged along the width direction of the three-dimensional warehouse 100, and the short sides are the depth of the three-dimensional warehouse 100. It is arranged along the direction.

In the case of the present embodiment, the three-dimensional warehouse is set in a direction in which the upper and lower end surfaces of the flanges 10 and 11 as the projecting portions formed on the upper and lower ends of the seismic isolation column 6 are allowed to tilt (the long side direction). The direction in which the inclination of the upper and lower end surfaces of the flanges 10 and 11 as protruding portions formed at the upper and lower ends of the seismic isolation column 6 is prevented (in the direction of the short side and the fixing The direction in which the connecting member 12 extends) is made to coincide with the depth direction of the three-dimensional warehouse 100.

Next, the operation of the above embodiment will be described.

During normal times when an earthquake does not occur, the seismic isolation column 6 is held vertically as shown in FIG. 1, and the load applied to the column 1 above the seismic isolation column 6 is from the horizontal flange 1A and the upper restraining member 7. It is transmitted to the lower pillar 1 via the seismic isolation pillar 6 having the flanges 10 and 11 provided at the upper and lower ends and the lower restraining member 8 and the horizontal flange 1B. However, in FIG. 1, the seismic isolation column 6 is held vertically even when the column 1 sways in the horizontal direction with a relatively small acceleration due to a small-to-medium-scale earthquake.

That is, due to the load applied to the column 1, the flanges 10 and 11 of the seismic isolation column 6 are pressed against the horizontal flange 1A and the horizontal flange 1B via the upper restraining member 7 and the lower restraining member 8. At this time, since the horizontal flange 1A and the horizontal flange 1B are provided with the upper restraint member 7 and the lower restraint member 8 surrounding the outer circumferences of the flanges 10 and 11 of the seismic isolation column 6, the seismic isolation column 6 is horizontal. Movement in the direction is prevented. Therefore, the seismic isolation column 6 is held vertically even if a shake of relatively small acceleration occurs in the horizontal direction due to a small-to-medium-scale earthquake. This is because the moment that tends to tilt the seismic isolation column 6 due to the acceleration in the horizontal direction does not exceed the moment that tends to hold the seismic isolation column 6 in the vertical state due to the vertical load supported by the seismic isolation column 6. As far as possible, the seismic isolation column 6 is based on a trigger function that cannot tilt.

On the other hand, when a large earthquake sways in the horizontal direction due to a large-scale earthquake, the upper pillar 1 tries to stay in place due to inertia, while the lower pillar 1 moves horizontally. It will be in the state of doing. At this time, the flange 11 of the seismic isolation column 6 is in contact with the lower restraint member 8 and cannot move in the horizontal direction. However, at both width ends of the lower end surface of the flange 11 in the width direction of the three-dimensional warehouse 100, tapered surfaces 11a having an upward slope from the center side to the width end side are formed. Therefore, when a load exceeding the trigger load range is applied to the flanges 10 and 11 of the seismic isolation column 6, the seismic isolation column 6 is provided with a lower end surface and a tapered surface of the flange 11 as shown in FIG. Inclination is started with a side of a portion serving as a boundary with 11a and a side of a portion serving as a boundary between the upper end surface of the flange 10 and the tapered surface 10a as fulcrums. Due to the effect of the seismic isolation in which the seismic isolation column 6 is tilted in this manner, transmission of a large seismic force in the horizontal direction is reduced.

Here, since the stopper portion 7a and the stopper portion 8a are formed in the horizontal restraint portion 7b of the upper restraint member 7 and the horizontal restraint portion 8b of the lower restraint member 8, the seismic isolation column 6 is excessively inclined. Even if an attempt is made, the flanges 10 and 11 contact the stopper portion 7a and the stopper portion 8a, thereby preventing the seismic isolation column 6 from tilting beyond the limit tilt angle position. As a result, there is no concern that the seismic isolation column 6 will fall over, and it will be possible to reliably return to the original position.

Moreover, a fluid pressure damper 9a as a connecting body 9 is interposed between the beam 2 as a lower member extending so as to connect the lower surfaces of the horizontal flanges 1B and 1B and the seismic isolation column 6. Therefore, when a large-scale earthquake occurs, it becomes possible to reduce the inclination speed of the seismic isolation column 6 and suppress the inclination angle of the seismic isolation column 6, and the seismic isolation column 6 changes from the inclined state to the upright state. When restored, it is possible to reduce the load with which the flanges 10 and 11 contact the upper restraining member 7 and the lower restraining member 8. Further, since the inclination angle of the seismic isolation column 6 is suppressed, the contact of the flanges 10 and 11 with the stopper portion 7a and the stopper portion 8a can be reduced.

Further, as shown in FIG. 5, a coil spring is used as a connecting body 9 instead of the fluid pressure damper 9a between the beam 2 as a lower member extending so as to connect the lower surfaces of the horizontal flanges 1B and 1B and the seismic isolation column 6. It is also possible to interpose 9b. Even if the coil spring 9b is used as the connecting body 9, when the large-scale earthquake occurs, the inclination speed of the seismic isolation column 6 can be reduced to suppress the inclination angle of the seismic isolation column 6, and the stopper portion can be provided. It is possible to reduce the contact of the flanges 10 and 11 with the 7a and the stopper portion 8a and positively restore the seismic isolation column 6 from the inclined state to the upright state.

On the other hand, as shown in FIGS. 2 and 3, the seismic isolation columns 6 are fixed to each other by fixed connecting members 12 extending in a direction orthogonal to the longitudinal direction of the seismic isolation columns 6, and the fixed connecting members 12 extend. Since the direction is aligned with the depth direction of the three-dimensional warehouse 100, the direction in which the seismic isolation column 6 tilts can be limited to only the width direction of the three-dimensional warehouse 100, and the seismic isolation column 6 is prevented from swinging around. The operation can be stabilized.

In addition, as shown in FIG. 1, at both width end portions in the direction in which the upper and lower end surfaces of the flanges 10 and 11 as protruding portions formed on the upper and lower end portions of the seismic isolation column 6 are allowed to have a center, as shown in FIG. Since the tapered surfaces 10a and 11a are formed from the side to the width end side, it is possible to more accurately limit the direction in which the seismic isolation column 6 is inclined only to the width direction of the three-dimensional warehouse 100. Seismic behavior can be further stabilized.

As is clear from FIG. 6(a), the three-dimensional warehouse 100 has a narrow width across the stacker crane 4 and extends high upward, and when a large-scale earthquake occurs, its width direction is increased. In the depth direction of the three-dimensional warehouse 100, as shown in FIG. 6( b ), it has a shape that extends horizontally long, and the shaking is less likely to occur as compared with the width direction. Therefore, by allowing the seismic isolation column 6 to tilt in the width direction of the three-dimensional warehouse 100 and preventing the seismic isolation column 6 from tilting in the depth direction of the three-dimensional warehouse 100, the seismic isolation direction is limited to the horizontal uniaxial direction. It will be effective to do so.

Further, the seismic isolation devices 5 may be arranged in a plurality of stages in the vertical direction of the three-dimensional warehouse 100 as a structure to be seismically isolated. By arranging in this way, it is possible to absorb a greater amount of shaking compared to the case where the seismic isolation is performed in a single step.

In this way, it is possible to isolate the sway acting on the three-dimensional warehouse 100 as a structure with a simple structure and surely prevent the seismic isolation column 6 from excessively tilting.

In the present embodiment, the seismic isolation column 6 is provided with a fixed connecting member 12 that extends and fixes the seismic isolation column 6 in a direction orthogonal to the longitudinal direction of the seismic isolation column 6, and the seismic isolation column 6 and the fixed connection. The seismic isolation column 6 is allowed to tilt in a direction orthogonal to the surface formed by the material 12, and the seismic isolation is formed in a direction along the surface formed by the seismic isolation column 6 and the fixed connecting member 12. The pillar 6 is designed so as to be prevented from tilting. With this configuration, the direction in which the seismic isolation column 6 is inclined can be limited to a specific direction (for example, the width direction of the three-dimensional warehouse 100), and the seismic isolation column 6 is prevented from swinging around. The operation can be stabilized.

Further, both width ends in the direction in which the upper end surface of the flange 10 as an overhanging portion formed on the upper end portion of the seismic isolation column 6 is allowed to incline, a downward slope from the center side toward the width end side. A tapered surface 10 a is formed, and both width end portions in the direction in which the inclination at the lower end surface of the flange 11 as an overhanging portion formed at the lower end portion of the seismic isolation column 6 is allowed have a width from the center side. A tapered surface 11a having an upward slope is formed toward the end side. With this configuration, it is possible to more accurately limit the direction in which the seismic isolation column 6 is inclined only to a specific direction (for example, the width direction of the three-dimensional warehouse 100), and further stabilize the seismic isolation behavior. be able to.

Furthermore, if the connecting body 9 is a fluid pressure damper 9a, the inclination speed of the seismic isolation column 6 can be reduced and the inclination angle of the seismic isolation column 6 can be suppressed when a large-scale earthquake occurs. When the seismic isolation column 6 is restored from the inclined state to the upright state, it is possible to reduce the load with which the flanges 10 and 11 contact the upper restraining member 7 and the lower restraining member 8.

Further, when the connecting body 9 is the coil spring 9b, when the large-scale earthquake occurs, the inclination speed of the seismic isolation column 6 can be reduced to suppress the inclination angle of the seismic isolation column 6, and the upper side of the seismic isolation column 6 can be suppressed. It is possible to reduce the contact of the flanges 10 and 11 with the restraint member 7 and the lower restraint member 8 and to positively restore the seismic isolation column 6 from the inclined state to the upright state.

The seismic isolation device of the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

1A Horizontal flange (upper member)
1B Horizontal flange (lower member)
2 beams (upper member, lower member)
5 Seismic Isolation Device 6 Seismic Isolation Column 7 Upper Restraint Member 8 Lower Restraint Member 9 Connected Body 9a Fluid Pressure Damper 9b Coil Spring 10 Flange (Overhang)
10a Tapered surface 11 Flange (overhang)
11a Tapered surface 12 Fixed connection material

Claims (6)

A seismic isolation column that is tiltably disposed between the upper member and the lower member and has overhangs formed at the upper and lower ends,
An upper restraint member that restrains an overhang formed at the upper end of the seismic isolation column so as not to move in the horizontal direction with respect to the upper member,
A lower restraint member that restrains the overhang formed at the lower end of the seismic isolation column so as not to move in the horizontal direction with respect to the lower member,
At least one of the functions of the damper element and the spring element, the damper element and the spring element between the between the lower member and MenShinhashira or said upper member and MenShinhashira is interposed so as to be located Seismic isolation device with a connecting body. A fixed connecting member that extends between and fixes the seismic isolation columns in a direction orthogonal to the longitudinal direction of the seismic isolation columns;
Inclination of the seismic isolation column is allowed in a direction orthogonal to a surface formed by the seismic isolation column and the fixed connecting member, and in a direction along a surface formed by the seismic isolation column and the fixed connecting member. The seismic isolation device according to claim 1, wherein the seismic isolation column is configured to prevent the inclination of the seismic isolation column. A tapered surface is formed on both upper and lower ends of the projecting portion formed on the upper end of the seismic isolation column in a direction in which the inclination is allowed, in a downward slope from the center side toward the width end side. A taper surface that has an upward slope from the center side to the width end side is formed at both width end portions in the direction in which the inclination of the lower end surface of the overhang portion formed at the lower end portion of the seismic isolation column is allowed. The seismic isolation device according to claim 2. The seismic isolation device according to claim 1, wherein the connecting body is a fluid pressure damper. The seismic isolation device according to claim 1, wherein the connecting body is a coil spring. A seismic isolation column that is tiltably disposed between the upper member and the lower member and has overhangs formed at the upper and lower ends,
An upper restraint member that restrains an overhang formed on the upper end of the seismic isolation column with respect to the upper member,
A lower restraint member that restrains the overhang formed at the lower end of the seismic isolation column with respect to the lower member,
It has at least one function of a damping element and a spring element, and is interposed so that the damping element and the spring element are located between the lower member and the seismic isolation column or between the upper member and the seismic isolation column. With connected body
Seismic isolation device.

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