JP2021173074A - Intermediate floor seismic isolation structure - Google Patents

Abstract

To provide an intermediate floor seismic isolation structure that can reliably prevent the amount of horizontal relative displacement between a substructure and a superstructure from becoming larger than a certain level and prevent damage such as falling of a seismic isolation device itself without installing a shock absorber such as a damper in an intermediate seismic isolation structure in which the seismic isolation device is provided between a lower column, which is the substructure, and an upper column, which is the superstructure.SOLUTION: In an intermediate seismic isolation structure in which a seismic isolation device 11 is provided between a lower column which is a substructure 5 and an upper column which is a superstructure 3 and a movable wall 7 is interposed in one of the superstructure 3 and the substructure 5 via rotatable means, a protruding beam 126 as displacement limiting means is hung down from the superstructure 3, and the protruding beam 126 surrounds the upper part of the lower column.SELECTED DRAWING: Figure 2

Description

The present invention relates to an intermediate floor seismic isolation structure.

The vibration propagated from the ground to the substructure due to the seismic motion is transmitted to the upper structure above the substructure by the seismic isolation device by interposing a seismic isolation device in the pillar part of the middle floor of the structure. Intermediate floor seismic isolation structures that reduce propagation are known.

12 to 14 show an example thereof. In the intermediate floor seismic isolation structure, the seismic isolation device 11 made of laminated rubber or the like has an upper structure 3 having at least one upper wall 2 and at least one lower wall. It is arranged between the lower structure 5 and the lower structure 5 having the 4.

Further, as a wall structure 110 for improving the design adapted to the seismic isolation structure, a movable wall 7 is interposed in either the upper structure 3 or the lower structure 5 via a rotatable means.

For example, the following patent document shows an example in which a movable wall is provided on a lower structure so as to be rotatable and movable. (See FIG. 13)
Japanese Unexamined Patent Publication No. 2004-176483

In Patent Document 1, the rotatably movable means is a hinge 117, which is fixed to an upper structure 3 by a base plate 113 to support a movable wall 7 and guide the movable wall 7 in a vertically rotatably movable manner. Reference numerals 111 in the figure are corner pillars provided at the four corners of the pillar.

By the way, at the time of an earthquake, as shown in FIG. 14, if the amount of horizontal relative displacement between the lower structure 5 and the upper structure 3 exceeds the permissible value, the seismic isolation device 11 is damaged and the restoring force is lost. Destruction can occur.

Then, when the seismic isolation device 11 is displaced beyond the permissible value, the superstructure 3 itself is damaged such as falling.

Therefore, as described in the patent document below, a damper is provided to reduce the horizontal displacement acting on the seismic isolation device during an earthquake.
Japanese Unexamined Patent Publication No. 2008-274622

As shown in FIG. 15, this patent document 2 is formed below a seismic isolation bearing device 54 inserted into a pillar 53 to support seismic isolation of an upper structure 51 of a building and a seismic isolation bearing device 54. A vertical reaction force portion 56 provided from the lower structure 52 toward the upper structure 51, and a lateral reaction force portion 57 connecting the vertical reaction force portion 56 and the portion of the pillar 53 below the seismic isolation bearing device 54. It has a viscous damper 58 that connects the vertical reaction force portion 56 and the superstructure 51 in the lateral direction in order to attenuate the vibration of the superstructure 51 at the time of an earthquake.

A damping force is generated in the viscous damper 58 due to the inertial force from the superstructure 51 due to the earthquake. The damping force acts from the viscous damper 58 to the longitudinal reaction force portion 56 in the horizontal direction. The reaction force portion of the lower structure 52 formed by the vertical reaction force portion 56, the lateral reaction force portion 57, and the column lower portion 53b resists this damping force.

Mainly, the lateral reaction force portion 57 connected to the vertical reaction force portion 56 resists the damping force by compression and pulling, and the horizontal force is also borne by the connection portion of the vertical reaction force portion 56 with the lower beam 55.

In the method of providing a damper as described above and reducing the tensile force acting on the seismic isolation device in the event of an earthquake to cause damage such as the seismic isolation device itself falling, a structure for installing the damper is secured in a large space. There must be.

In particular, it is difficult to dispose of dampers in a seismic isolation structure on the middle floor where a seismic isolation device is installed in the middle of the columns.

In addition, the damper may not function properly depending on the direction of the tensile force acting on the seismic isolation device during an earthquake.

An object of the present invention is to solve the above-mentioned inconvenience of the conventional example, and to provide a shock absorber such as a damper in an intermediate seismic isolation structure in which a seismic isolation device is provided between a lower pillar which is a lower structure and an upper pillar which is an upper structure. An intermediate floor that can prevent the relative displacement amount of the lower structure and the upper structure from becoming larger than a certain level and prevent damage such as the upper structure itself from falling without being provided. It is to provide seismic isolation structures.

In order to achieve the above object, the present invention according to claim 1 provides a seismic isolation device between a lower pillar which is a lower structure and an upper pillar which is an upper structure, and an upper part of a movable wall is provided via a rotatable means. In the intermediate seismic isolation structure interposed in either the structure or the lower structure, a protruding beam as a displacement limiting means is provided by hanging the protruding beam on the upper structure, and the protruding beam is used to surround the upper part of the lower column. The gist is that it surrounds.

According to the first aspect of the present invention, when the protruding beam of the upper structure is displaced in the direction of the column of the lower structure, the side surface of the protruding beam and the upper part of the lower column of the lower structure come into contact with each other, and the protruding beam is formed. It becomes a barrier and regulates displacement, and it is possible to prevent the risk of the seismic isolation device falling off due to excessive displacement of the superstructure.

The gist of the present invention according to claim 2 is that the gap between the protruding beam and the lower column of the lower structure is closed by a movable horizontal plate as a fireproof coating.

According to the second aspect of the present invention, the projecting beam has a fireproof coating, and the space between the projecting beam and the column of the substructure is closed by a movable horizontal plate to provide fire protection. Can be improved.

The gist of the present invention according to claim 3 is that the movable horizontal plate is a ceiling plate and is detachably joined to the ceiling plate inside the adjacent building frame.

According to the third aspect of the present invention, in normal times, the movable horizontal plate is combined with the ceiling plate inside the adjacent building skeleton as a ceiling plate to form a series of ceilings, and in the event of an earthquake, the movable horizontal plate is a ceiling plate of the building skeleton. By removing it from the inner ceiling plate, it is possible to prevent the ceiling from collapsing.

The gist of the present invention according to claim 4 is that the protruding beam is integrally formed with the superstructure as a part of the superstructure.

According to the fourth aspect of the present invention, the protruding beam can be provided at the time of construction by being integrally formed as a part of the superstructure such as being formed of a reinforced concrete (RC) structure. It is also possible to retrofit as a PC member. Further, the protruding beam in RC has a fireproof structure, and this can be used as a fireproof coating.

The gist of the present invention according to claim 5 is that the protruding beam is a steel beam to be attached to the superstructure.

According to the fifth aspect of the present invention, by using the protruding beam as a steel frame beam, it can be easily attached to the superstructure by retrofitting.

As described above, the intermediate floor seismic isolation structure of the present invention is an intermediate seismic isolation structure in which a seismic isolation device is provided between a lower pillar which is a lower structure and an upper pillar which is an upper structure, and a buffer such as a damper is provided. Without providing a device, it is possible to reliably prevent the relative displacement amount of the lower structure and the upper structure in the horizontal direction from becoming larger than a certain level, and prevent damage such as the seismic isolation device itself falling. It is a thing.

It is a cross-sectional plan view which shows the 1st Embodiment of the intermediate floor seismic isolation structure of this invention. It is a vertical cross-sectional view of line VII-VII of FIG. 1, and is a state diagram in normal times. It is a vertical sectional view of line VII-VII of FIG. 1, and is a state diagram of an earthquake at all times. It is a side view of the main part which shows 1 Embodiment of the intermediate floor seismic isolation structure of this invention. It is a vertical sectional side view which shows the 2nd Embodiment of the intermediate floor seismic isolation structure of this invention. FIG. 5 is a vertical cross-sectional view taken along the line IX-IX of FIG. It is a vertical sectional side view which shows the 3rd Embodiment of the intermediate floor seismic isolation structure of this invention, and is the state diagram in the normal state. It is a vertical sectional side view which shows the 3rd Embodiment of the intermediate floor seismic isolation structure of this invention, and is the state diagram at the time of an earthquake. It is a cross-sectional plan view which shows the 4th Embodiment of the intermediate floor seismic isolation structure of this invention. FIG. 9 is a vertical cross-sectional view taken along line VIII-VIII of FIG. 9, which is a state diagram in normal times. FIG. 9 is a vertical cross-sectional view taken along the line VIII-VIII of FIG. 9, which is a state diagram at the time of an earthquake. It is a cross-sectional plan view of the seismic isolation structure on the middle floor. FIG. 12 is a vertical sectional view taken along line VV of FIG. 12, which is a state diagram in normal times. FIG. 12 is a vertical cross-sectional view taken along line VV of FIG. 12, which is a state diagram at the time of an earthquake. It is a vertical sectional side view which shows the conventional example.

Hereinafter, embodiments of the present invention will be described in detail with respect to the drawings. FIG. 1 is a cross-sectional plan view showing a first embodiment of the intermediate floor seismic isolation structure of the present invention of the present invention, FIG. 2 is a vertical sectional view of lines VII-VII of FIG. In the same state diagram at all times of the earthquake, the seismic isolation device 11 made of laminated rubber is installed between the lower pillar which is the lower structure 5 and the upper pillar which is the upper structure 3 in the same manner as described in FIGS. Also, the movable wall 7 is interposed in either the upper structure or the lower structure via the rotatable means.

Although detailed illustration of the movable wall 7 is not shown, the movable wall 7 is a hinge, which is fixed to the upper structure 3 by a base plate to support the movable wall 7 and can rotate and move the movable wall 7 in the vertical direction. I'm guiding you. (See FIGS. 12-14)

In the present invention, a protruding beam 126 as a displacement limiting means is hung down from the upper structure 3, and the protruding beam 126 surrounds the upper part of the lower column of the lower structure 5 with a gap.

The example of FIG. 1 is a case where the pillar is located at a corner, and the movable wall 7 is provided so as to be orthogonal to each other as an outer wall, and the protruding beam 126 is orthogonal to the movable wall 7 inside the building frame. To be provided.

Assuming that the superstructure 3 is made of reinforced concrete (RC), the protruding beam 126 is integrally formed of reinforced concrete (RC) as a part of the superstructure 3.

Further, as another embodiment of the protruding beam 126, as shown in FIGS. 5 and 6, the protruding beam 126 can be configured as a steel frame beam 171 attached to the superstructure 3.

The steel beam 171 is a steel frame having a stiffener 172, and an embedded plate 174 is provided as a bottom portion of a channel material connected to a vertical base plate 175 that sandwiches the skeleton beam, and the steel beam 171 is fastened to the embedded plate 174 with vertical bolts 176. do. In the figure, 177 is a through horizontal bolt that locks the vertical base plate 175 to the skeleton beam, and 178 is a cushioning material when the side surface of the beam 126 and the lower column of the lower structure 5 come into contact with each other.

If the protruding beam 126 is composed of a steel frame beam 171 so that it can be retrofitted.

In both the case of the beam integrally provided with the upper structure 3 and the case of the steel beam, the height of the lower surface of the protruding beam 126 is located below the upper surface of the lower column of the lower structure 5, and the upper structure 3 protrudes. When the beam 126 is displaced in the direction of the column of the lower structure 5, the side surface of the protruding beam 126 and the lower column of the lower structure 5 come into contact with each other. Therefore, further displacement is prevented, and the seismic isolation device 11 is prevented from falling off.

Further, in the present invention, the space between the projecting beam 126 and the column of the lower structure 5 can be closed by the movable horizontal plate 125 that moves in the lateral direction. The movable horizontal plate 125 is formed of a board having heat insulating performance as a fireproof coating.

FIG. 4 shows the details of mounting the movable horizontal plate 125. In the figure, 121 is a mounting plate made of a steel material, a mounting plate 121 is provided under the protruding beam 126 with bolts 127, and the rail 123 is mounted on the mounting plate 121. By bearing horizontally, the movable horizontal plate 125 moves along the rail 123.

A heat insulating material or a heat-expandable heat insulating material 124 is attached to the end portion of the movable horizontal plate 125 and the side surface of the lower pillar of the lower structure 5 with which the movable horizontal plate 125 abuts.

The movable horizontal plate 125 is engaged with the rail 123 by providing a slide groove and a guide roller, but the movable horizontal plate 125 is given a restoring force by the Conston spring 100 and is in the original position by the amount of movement. Restore to.

The presence of the movable horizontal plate 125 provides a fireproof coating structure, which utilizes the fact that the protruding beam 126 is a fireproof coating, and the space between the protruding beam 126 and the column of the substructure is movable. Fire protection performance can be improved by blocking with a horizontal plate 125.

7 and 8 show a second embodiment of the present invention, in which the movable horizontal plate 125 exists as a ceiling slab in addition to the above configuration, and is connected to the inner ceiling slab.

In the figure, 164 is a bearing ceiling slab as an inner ceiling slab. A support member 163 is hung on the upper structure 3, and the support member 163 is rotatably attached to the tip of the support member 163 via a hinge 162, held horizontally by a spring 161 and held on the ceiling. It was placed on the same plane as the plate 164.

The end of the bearing ceiling slab 164 is formed as an upward hook-shaped engaging portion, and the end of the movable horizontal plate 125 is formed as a downward hook-shaped engaging portion that engages with the upward hook-shaped engaging portion. By connecting these two hook-shaped engaging portions, as shown in FIG. 7, they are integrally connected to form a ceiling in normal times.

On the other hand, in the event of an earthquake, as shown in FIG. 8, the movable horizontal plate 125 is extruded by the displacement of the lower structure 5, and is separated from the bearing ceiling slab 164 to prevent the ceiling from collapsing.

9 to 11 show a fourth embodiment of the intermediate floor seismic isolation structure of the present invention, in which a movable wall 141 is provided at a corner portion in a direction of approximately 45 ° with respect to an orthogonal outer wall. ..

An upper eave 128 is formed in the upper structure 3, and the movable wall 141 is suspended from the upper eave 128 by a hinge 117. 129 is the lower eaves, and the movable wall 141 closes between the upper eaves 128 and the lower eaves 129.

A detachable protruding beam 130 is fixed to the protruding beam 126 by a bolt 127, and can be removed at the time of internal inspection or maintenance.

According to this embodiment, even when the outer walls are orthogonal to each other at the inside corner, a wall structure that does not hinder deformation during an earthquake is possible. Further, since the periphery of the seismic isolation device 11 is blocked by the movable wall 141 at the entrance corner and the protruding beam 126 of the previous period and the movable horizontal plate 125 interposed therein, fire resistance can be imparted.

In the figure, 118 is an oblique sliding material having an arrowhead shape with a cross section protruding from the lower eaves 129, and 115 is for latching the corner pillar 111 and releasing the latch (not shown) for fixing the movement of the movable wall 141 in normal times. A rod tip diagonal member having an arrowhead-shaped cross section formed at the tip of the rod, and both the diagonal sliding member 118 and the rod tip diagonal member 115 are brought into contact with each other.

The movable wall 141 hangs down from the upper eaves 128 at the hinge 117 and becomes a vertical state, but is further locked by the latch and does not move due to strong wind or the like.

In the event of an earthquake, the diagonal sliding member 118 and the diagonal rod tip diagonal member 115 come into contact with each other and push up the rod tip diagonal member 115, the rod moves upward and the latch is released, enabling the rotary movement of the movable wall 141. Prevent damage to the wall.

2 ... Upper wall 3 ... Upper structure 4 ... Lower wall 5 ... Lower structure 7 ... Movable wall 11 ... Seismic isolation device 51 ... Upper structure 52 ... Lower structure 53 ... Pillar 53b ... Pillar lower part 54 ... Seismic bearing Device 55 ... Lower beam 56 ... Vertical reaction force 57 ... Lateral reaction force 58 ... Viscous damper 100 ... Conston spring 101 ... Locking material 110 ... Wall structure 111 ... Corner pillar 113 ... Base plate 115 ... Rod tip diagonal member 117 ... Hinge 118 ... Diagonal sliding material 120 ... Wall structure 121 ... Mounting plate 123 ... Rail 124 ... Insulation 125 ... Movable horizontal 126 ... Protruding beam 127 ... Bolt 128 ... Upper ceiling 129 ... Lower ceiling 130 ... Detachable protruding beam 141 ... Movable wall 161 ... Spring 162 ... Hinge 163 ... Support material 164 ... Ceiling plate 171 ... Steel beam 172 ... Stiffener 174 ... Embedded plate 175 ... Vertical base plate 176 ... Vertical bolt 177 ... Through horizontal bolt 178 ... Buffer material

The present invention relates to an intermediate floor seismic isolation structure.

The vibration propagated from the ground to the substructure due to the seismic motion is transmitted to the upper structure above the substructure by the seismic isolation device by interposing a seismic isolation device in the pillar part of the middle floor of the structure. Intermediate floor seismic isolation structures that reduce propagation are known.

12 to 14 show an example thereof. In the intermediate floor seismic isolation structure, the seismic isolation device 11 made of laminated rubber or the like has an upper structure 3 having at least one upper wall 2 and at least one lower wall. It is arranged between the lower structure 5 and the lower structure 5 having the 4.

Further, as a wall structure 110 for improving the design adapted to the seismic isolation structure, a movable wall 7 is interposed in either the upper structure 3 or the lower structure 5 via a rotatable means.

For example, the following patent document shows an example in which a movable wall is provided on a lower structure so as to be rotatable and movable. (See FIG. 13)
Japanese Unexamined Patent Publication No. 2004-176483

In Patent Document 1, the rotatably movable means is a hinge 117, which is fixed to an upper structure 3 by a base plate 113 to support a movable wall 7 and guide the movable wall 7 in a vertically rotatably movable manner. Reference numerals 111 in the figure are corner pillars provided at the four corners of the pillar.

By the way, at the time of an earthquake, as shown in FIG. 14, if the amount of horizontal relative displacement between the lower structure 5 and the upper structure 3 exceeds the permissible value, the seismic isolation device 11 is damaged and the restoring force is lost. Destruction can occur.

Then, when the seismic isolation device 11 is displaced beyond the permissible value, the superstructure 3 itself is damaged such as falling.

Therefore, as described in the patent document below, a damper is provided to reduce the horizontal displacement acting on the seismic isolation device during an earthquake.
Japanese Unexamined Patent Publication No. 2008-274622

As shown in FIG. 15, this patent document 2 is formed below a seismic isolation bearing device 54 inserted into a pillar 53 to support seismic isolation of an upper structure 51 of a building and a seismic isolation bearing device 54. A vertical reaction force portion 56 provided from the lower structure 52 toward the upper structure 51, and a lateral reaction force portion 57 connecting the vertical reaction force portion 56 and the portion of the pillar 53 below the seismic isolation bearing device 54. It has a viscous damper 58 that connects the vertical reaction force portion 56 and the superstructure 51 in the lateral direction in order to attenuate the vibration of the superstructure 51 at the time of an earthquake.

A damping force is generated in the viscous damper 58 due to the inertial force from the superstructure 51 due to the earthquake. The damping force acts from the viscous damper 58 to the longitudinal reaction force portion 56 in the horizontal direction. The reaction force portion of the lower structure 52 formed by the vertical reaction force portion 56, the lateral reaction force portion 57, and the column lower portion 53b resists this damping force.

Mainly, the lateral reaction force portion 57 connected to the vertical reaction force portion 56 resists the damping force by compression and pulling, and the horizontal force is also borne by the connection portion of the vertical reaction force portion 56 with the lower beam 55.

In the method of providing a damper as described above and reducing the tensile force acting on the seismic isolation device in the event of an earthquake to cause damage such as the seismic isolation device itself falling, a structure for installing the damper is secured in a large space. There must be.

In particular, it is difficult to dispose of dampers in a seismic isolation structure on the middle floor where a seismic isolation device is installed in the middle of the columns.

In addition, the damper may not function properly depending on the direction of the tensile force acting on the seismic isolation device during an earthquake.

An object of the present invention is to solve the above-mentioned inconvenience of the conventional example, and to provide a shock absorber such as a damper in an intermediate seismic isolation structure in which a seismic isolation device is provided between a lower pillar which is a lower structure and an upper pillar which is an upper structure. An intermediate floor that can prevent the relative displacement amount of the lower structure and the upper structure from becoming larger than a certain level and prevent damage such as the upper structure itself from falling without being provided. It is to provide seismic isolation structures.

In order to achieve the above object, the present invention according to claim 1 is provided with a seismic isolation device between a lower pillar which is a lower structure and an upper pillar which is an upper structure, and an upper part of a movable wall is provided via a rotatable means. In the intermediate seismic isolation structure interposed in either the structure or the substructure, a projecting beam as a displacement limiting means is provided by hanging the projecting beam on the upper structure, and the projecting beam is used to surround the upper part of the lower column. The gist is that the gap between the protruding beam and the lower column of the substructure is closed by a movable horizontal plate as a fireproof coating.

According to the first aspect of the present invention, when the protruding beam of the upper structure is displaced in the direction of the column of the lower structure, the side surface of the protruding beam and the upper part of the lower column of the lower structure come into contact with each other, and the protruding beam is formed. It becomes a barrier and regulates displacement, and it is possible to prevent the risk of the seismic isolation device falling off due to excessive displacement of the superstructure.

Further, by utilizing the fact that the protruding beam has a fireproof coating, and further, the space between the protruding beam and the column of the substructure can be closed by a movable horizontal plate to improve the fire protection performance.

The gist of the present invention according to claim 2 is that the movable horizontal plate is a ceiling plate and is detachably joined to the ceiling plate inside the adjacent building frame.

According to the second aspect of the present invention, in normal times, the movable horizontal plate is combined with the ceiling plate inside the adjacent building skeleton as a ceiling plate to form a series of ceilings, and in the event of an earthquake, the movable horizontal plate is a ceiling plate of the building skeleton. By removing it from the inner ceiling plate, it is possible to prevent the ceiling from collapsing.

The gist of the present invention according to claim 3 is that the protruding beam is integrally formed with the superstructure as a part of the superstructure.

According to the third aspect of the present invention, the protruding beam can be provided at the time of construction by being integrally formed as a part of the superstructure such as being formed of a reinforced concrete (RC) structure. It is also possible to retrofit as a PC member. Further, the protruding beam in RC has a fireproof structure, and this can be used as a fireproof coating.

The gist of the present invention according to claim 4 is that the protruding beam is a steel beam to be attached to the superstructure.

According to the fourth aspect of the present invention, by using the protruding beam as a steel frame beam, it can be easily attached to the superstructure by retrofitting.

As described above, the intermediate floor seismic isolation structure of the present invention is an intermediate seismic isolation structure in which a seismic isolation device is provided between a lower pillar which is a lower structure and an upper pillar which is an upper structure, and a buffer such as a damper is provided. Without providing a device, it is possible to reliably prevent the relative displacement amount of the lower structure and the upper structure in the horizontal direction from becoming larger than a certain level, and prevent damage such as the seismic isolation device itself falling. It is a thing.

It is a cross-sectional plan view which shows the 1st Embodiment of the intermediate floor seismic isolation structure of this invention. It is a vertical cross-sectional view of line VII-VII of FIG. 1, and is a state diagram in normal times. It is a vertical sectional view of line VII-VII of FIG. 1, and is a state diagram of an earthquake at all times. It is a side view of the main part which shows 1 Embodiment of the intermediate floor seismic isolation structure of this invention. It is a vertical sectional side view which shows the 2nd Embodiment of the intermediate floor seismic isolation structure of this invention. FIG. 5 is a vertical cross-sectional view taken along the line IX-IX of FIG. It is a vertical sectional side view which shows the 3rd Embodiment of the intermediate floor seismic isolation structure of this invention, and is the state diagram in the normal state. It is a vertical sectional side view which shows the 3rd Embodiment of the intermediate floor seismic isolation structure of this invention, and is the state diagram at the time of an earthquake. It is a cross-sectional plan view which shows the 4th Embodiment of the intermediate floor seismic isolation structure of this invention. FIG. 9 is a vertical cross-sectional view taken along line VIII-VIII of FIG. 9, which is a state diagram in normal times. FIG. 9 is a vertical cross-sectional view taken along the line VIII-VIII of FIG. 9, which is a state diagram at the time of an earthquake. It is a cross-sectional plan view of the seismic isolation structure on the middle floor. FIG. 12 is a vertical sectional view taken along line VV of FIG. 12, which is a state diagram in normal times. FIG. 12 is a vertical cross-sectional view taken along line VV of FIG. 12, which is a state diagram at the time of an earthquake. It is a vertical sectional side view which shows the conventional example.

Hereinafter, embodiments of the present invention will be described in detail with respect to the drawings. FIG. 1 is a cross-sectional plan view showing a first embodiment of the intermediate floor seismic isolation structure of the present invention of the present invention, FIG. 2 is a vertical sectional view of lines VII-VII of FIG. In the same state diagram at all times of the earthquake, the seismic isolation device 11 made of laminated rubber is installed between the lower pillar which is the lower structure 5 and the upper pillar which is the upper structure 3 in the same manner as described in FIGS. Also, the movable wall 7 is interposed in either the upper structure or the lower structure via the rotatable means.

Although detailed illustration of the movable wall 7 is not shown, the movable wall 7 is a hinge, which is fixed to the upper structure 3 by a base plate to support the movable wall 7 and can rotate and move the movable wall 7 in the vertical direction. I'm guiding you. (See FIGS. 12-14)

In the present invention, a protruding beam 126 as a displacement limiting means is hung down from the upper structure 3, and the protruding beam 126 surrounds the upper part of the lower column of the lower structure 5 with a gap.

The example of FIG. 1 is a case where the pillar is located at a corner, and the movable wall 7 is provided so as to be orthogonal to each other as an outer wall, and the protruding beam 126 is orthogonal to the movable wall 7 inside the building frame. To be provided.

Assuming that the superstructure 3 is made of reinforced concrete (RC), the protruding beam 126 is integrally formed of reinforced concrete (RC) as a part of the superstructure 3.

Further, as another embodiment of the protruding beam 126, as shown in FIGS. 5 and 6, the protruding beam 126 can be configured as a steel frame beam 171 attached to the superstructure 3.

The steel beam 171 is a steel frame having a stiffener 172, and an embedded plate 174 is provided as a bottom portion of a channel material connected to a vertical base plate 175 that sandwiches the skeleton beam, and the steel beam 171 is fastened to the embedded plate 174 with vertical bolts 176. do. In the figure, 177 is a through horizontal bolt that locks the vertical base plate 175 to the skeleton beam, and 178 is a cushioning material when the side surface of the beam 126 and the lower column of the lower structure 5 come into contact with each other.

If the protruding beam 126 is composed of a steel frame beam 171 so that it can be retrofitted.

In both the case of the beam integrally provided with the upper structure 3 and the case of the steel beam, the height of the lower surface of the protruding beam 126 is located below the upper surface of the lower column of the lower structure 5, and the upper structure 3 protrudes. When the beam 126 is displaced in the direction of the column of the lower structure 5, the side surface of the protruding beam 126 and the lower column of the lower structure 5 come into contact with each other. Therefore, further displacement is prevented, and the seismic isolation device 11 is prevented from falling off.

Further, in the present invention, the space between the projecting beam 126 and the column of the lower structure 5 can be closed by the movable horizontal plate 125 that moves in the lateral direction. The movable horizontal plate 125 is formed of a board having heat insulating performance as a fireproof coating.

FIG. 4 shows the details of mounting the movable horizontal plate 125. In the figure, 121 is a mounting plate made of a steel material, a mounting plate 121 is provided under the protruding beam 126 with bolts 127, and the rail 123 is mounted on the mounting plate 121. By bearing horizontally, the movable horizontal plate 125 moves along the rail 123.

A heat insulating material or a heat-expandable heat insulating material 124 is attached to the end portion of the movable horizontal plate 125 and the side surface of the lower pillar of the lower structure 5 with which the movable horizontal plate 125 abuts.

The movable horizontal plate 125 is engaged with the rail 123 by providing a slide groove and a guide roller, but the movable horizontal plate 125 is given a restoring force by the Conston spring 100 and is in the original position by the amount of movement. Restore to.

The presence of the movable horizontal plate 125 provides a fireproof coating structure, which utilizes the fact that the protruding beam 126 is a fireproof coating, and the space between the protruding beam 126 and the column of the substructure is movable. Fire protection performance can be improved by blocking with a horizontal plate 125.

7 and 8 show a second embodiment of the present invention, in which the movable horizontal plate 125 exists as a ceiling slab in addition to the above configuration, and is connected to the inner ceiling slab.

In the figure, 164 is a bearing ceiling slab as an inner ceiling slab. A support member 163 is hung on the upper structure 3, and the support member 163 is rotatably attached to the tip of the support member 163 via a hinge 162, held horizontally by a spring 161 and held on the ceiling. It was placed on the same plane as the plate 164.

The end of the bearing ceiling slab 164 is formed as an upward hook-shaped engaging portion, and the end of the movable horizontal plate 125 is formed as a downward hook-shaped engaging portion that engages with the upward hook-shaped engaging portion. By connecting these two hook-shaped engaging portions, as shown in FIG. 7, they are integrally connected to form a ceiling in normal times.

On the other hand, in the event of an earthquake, as shown in FIG. 8, the movable horizontal plate 125 is extruded by the displacement of the lower structure 5, and is separated from the bearing ceiling slab 164 to prevent the ceiling from collapsing.

9 to 11 show a fourth embodiment of the intermediate floor seismic isolation structure of the present invention, in which a movable wall 141 is provided at a corner portion in a direction of approximately 45 ° with respect to an orthogonal outer wall. ..

An upper eave 128 is formed in the upper structure 3, and the movable wall 141 is suspended from the upper eave 128 by a hinge 117. 129 is the lower eaves, and the movable wall 141 closes between the upper eaves 128 and the lower eaves 129.

A detachable protruding beam 130 is fixed to the protruding beam 126 by a bolt 127, and can be removed at the time of internal inspection or maintenance.

According to this embodiment, even when the outer walls are orthogonal to each other at the inside corner, a wall structure that does not hinder deformation during an earthquake is possible. Further, since the periphery of the seismic isolation device 11 is blocked by the movable wall 141 at the entrance corner and the protruding beam 126 of the previous period and the movable horizontal plate 125 interposed therein, fire resistance can be imparted.

In the figure, 118 is an oblique sliding material having an arrowhead shape with a cross section protruding from the lower eaves 129, and 115 is for latching the corner pillar 111 and releasing the latch (not shown) for fixing the movement of the movable wall 141 in normal times. A rod tip diagonal member having an arrowhead-shaped cross section formed at the tip of the rod, and both the diagonal sliding member 118 and the rod tip diagonal member 115 are brought into contact with each other.

The movable wall 141 hangs down from the upper eaves 128 at the hinge 117 and becomes a vertical state, but is further locked by the latch and does not move due to strong wind or the like.

In the event of an earthquake, the diagonal sliding member 118 and the diagonal rod tip diagonal member 115 come into contact with each other and push up the rod tip diagonal member 115, the rod moves upward and the latch is released, enabling the rotary movement of the movable wall 141. Prevent damage to the wall.

2 ... Upper wall 3 ... Upper structure 4 ... Lower wall 5 ... Lower structure 7 ... Movable wall 11 ... Seismic isolation device 51 ... Upper structure 52 ... Lower structure 53 ... Pillar 53b ... Pillar lower part 54 ... Seismic bearing Device 55 ... Lower beam 56 ... Vertical reaction force 57 ... Lateral reaction force 58 ... Viscous damper 100 ... Conston spring 101 ... Locking material 110 ... Wall structure 111 ... Corner pillar 113 ... Base plate 115 ... Rod tip diagonal member 117 ... Hinge 118 ... Diagonal sliding material 120 ... Wall structure 121 ... Mounting plate 123 ... Rail 124 ... Insulation 125 ... Movable horizontal 126 ... Protruding beam 127 ... Bolt 128 ... Upper ceiling 129 ... Lower ceiling 130 ... Detachable protruding beam 141 ... Movable wall 161 ... Spring 162 ... Hinge 163 ... Support material 164 ... Ceiling plate 171 ... Steel beam 172 ... Stiffener 174 ... Embedded plate 175 ... Vertical base plate 176 ... Vertical bolt 177 ... Through horizontal bolt 178 ... Buffer material

Claims (5)

A seismic isolation device is provided between the lower column, which is the lower structure, and the upper column, which is the upper structure, and the movable wall is interposed in either the upper structure or the lower structure via a rotatable means. In the intermediate seismic isolation structure, the intermediate floor seismic isolation structure is characterized in that a projecting beam as a displacement limiting means is hung down from the upper structure, and the projecting beam surrounds the upper part of the lower column. The intermediate floor seismic isolation structure according to claim 1, wherein the gap between the protruding beam and the lower column of the lower structure is closed by a movable horizontal plate as a fireproof coating. The intermediate floor seismic isolation structure according to claim 2, wherein the movable horizontal plate is a ceiling plate and is detachably joined to the ceiling plate inside the adjacent building frame. The intermediate floor seismic isolation structure according to any one of claims 1 to 3, wherein the protruding beam is integrally formed with the superstructure as a part of the superstructure. The intermediate floor seismic isolation structure according to any one of claims 1 to 3, wherein the protruding beam is a steel beam to be attached to the superstructure.

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