JP6238076B2 - Slip isolation mechanism and construction method of slip isolation mechanism - Google Patents

Description

  The present invention relates to a sliding seismic isolation mechanism installed between a support portion such as a structural floor and a free access floor, and a construction method of the sliding seismic isolation mechanism.

Conventionally, a sliding plate (lower plate) is fixed on a structural floor, and a sliding plate (upper plate) is placed on the lower plate so that the upper plate can slide on the lower plate. In the seismic isolation mechanism, a sliding seismic isolation mechanism that reduces the displacement and residual displacement of the upper plate when an earthquake occurs is known by connecting the structural floor and the upper plate with a restoring spring such as a constant load spring. (For example, refer to Patent Document 1).
For example, when such a sliding seismic isolation mechanism is installed in an operating room of a hospital or the like, medical activities can be continued even if an earthquake occurs, and thus many applications are expected.

  In recent years, Internet data centers (IDCs), which are increasing in number, are adopting a seismic isolation structure so that servers can be protected even if an earthquake occurs. For example, in a large-scale rental IDC among IDCs, the building itself is often a seismic isolation building, and in a relatively small modular IDC, the cost increases when the building itself is a seismic isolation building. The building itself is a seismic building, and a sliding seismic isolation mechanism is often installed on the structural floor of the building.

JP 2013-064418 A

By the way, since many devices are installed in the IDC, the area is often as large as 100 m ² or more. Further, in the IDC, since a device or the like is placed on the free access floor, the loaded load is often very large, about 7 to 10 kN / m ² .
In such an IDC, the pillar of the free access floor is bonded and fixed to the upper part of the upper plate of the sliding seismic isolation mechanism, but the upper plate has a structure in which two thin plates of about 500 mm square are bonded. Therefore, there is a possibility that sufficient in-plane rigidity cannot be secured for a large load.
Further, if a large bending force or tensile force is applied to the support column, the upper plate may be deformed and the free access floor may be inclined, or the sliding seismic isolation mechanism may not function.
In addition, the restoring springs are installed on the outer peripheries of the upper and lower plates. However, if the area is large and the load is large, it is necessary to install many restoring springs. There is.

  Then, an object of this invention is to provide the construction method of the sliding seismic isolation mechanism which can be installed between support parts, such as a structure floor, and a free access floor, and a sliding seismic isolation mechanism.

In order to achieve the above object, a sliding seismic isolation mechanism according to the present invention includes a plate material supported by a support part,
A plurality of frames arranged at the top of the plate, a plurality of frames fixed to the bottom of the frame, and a slidable material that slidably supports the frame on the plate; the support or the plate; A restoring member made of an elastic body capable of connecting the frame body and restoring the displacement of the frame body with respect to the support portion; and a connecting material connecting the adjacent frame bodies; Is characterized in that a column of a free access floor is fixed at a position corresponding to the vertical direction of the sliding material, and a space in which the restoring material can be installed is provided between the adjacent frame bodies. .

  Further, in the method for constructing a slip isolation system according to the present invention, in the construction method for a slip isolation mechanism for constructing the above-mentioned slip isolation mechanism, plate material installation in which a plate material on which the slide material can slide is installed on the support portion. And a frame / restoration material installation step of arranging a plurality of the frame body on which the sliding material is fixed and arranging a plurality of the frame members on the plate material and connecting the support portion or the plate material and the frame body with the restoration material. And a frame connecting step for connecting the adjacent frames with the connecting member, and a free access floor laying step for laying the free access floor on the frame and the connecting member. In the body / restoration material installation step, the restoration material is installed in a space between the adjacent frame bodies.

In the present invention, the frame body supports the free access floor, and the frame body can sufficiently ensure in-plane rigidity even with a large load load as compared with a thin plate or the like, and the column can be bent to a large extent. Even when a force or a tensile force is applied, it is difficult to be deformed, so that the free access floor can be supported in a stable state even when the load is large.
In addition, a free access floor column is fixed to the upper part of the frame at a position corresponding to the vertical position of the sliding material, so that the sliding material can be placed on the free access floor and the free access floor. A load can be borne.

And by setting it as the structure with which the some frame was connected with the connection material, even when an installation area is large, it can respond by arranging multiple frames.
In addition, a space where a restoration material such as a restoration spring can be installed between adjacent frames, so that one large frame is installed at the installation location, and restoration is performed on the outer periphery of the frame. Compared with the case of installing materials, it can secure more space for installation of restoration materials, so it must be able to handle cases where the number of restoration materials is large due to large installation area and large loading load. Can do.
In addition, it is possible to easily cope with expansion.

In the sliding seismic isolation mechanism according to the present invention, it is preferable that the frame body is provided with a brace material.
Moreover, in the sliding seismic isolation mechanism according to the present invention, it is preferable that the frame body is composed of members in which shape steels are arranged in a lattice shape.
By setting it as such a structure, the in-plane rigidity of a frame can be improved more and a free access floor can be supported in the more stable state.

Moreover, in the sliding seismic isolation mechanism according to the present invention, it is preferable that the connecting member is configured to be capable of fixing a column of the free access floor to an upper portion.
By setting it as such a structure, the free access floor laid in the upper part between adjacent frames can also be supported reliably.

  In the present invention, even when the load is large, the frame can support the free access floor in a stable state, and even when the installation area is large, a plurality of frames are connected by a connecting material. Therefore, the sliding seismic isolation mechanism can be installed between the support portion and the free access floor even when the load is large or the installation area is large.

It is a side view which shows an example of the sliding seismic isolation mechanism by embodiment of this invention. FIG. 5 is an enlarged view of a portion C in FIG. 4 in a cross-sectional view taken along line AA in FIG. FIG. 6 is an enlarged view of a portion D in FIG. It is a figure which shows the whole of FIG. It is a figure which shows the whole of FIG. (A) is a figure explaining a sliding material and a frame, It is sectional drawing which shows the whole at the time of cut | disconnecting by the EE line of (b), (b) is the time at the time of cut | disconnecting by the FF line of (a). It is sectional drawing which shows the whole.

Hereinafter, a sliding seismic isolation mechanism according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 to 3, the sliding seismic isolation mechanism 1 according to the present embodiment is installed on a structural floor (supporting portion) 11 of a seismic structure where a modular IDC is installed. A plurality of steel plates (plate materials) 2 (see FIGS. 1 and 3) installed on the upper surface, a plurality of sliding materials 3 (see FIGS. 1 and 3) capable of sliding on the steel plate 2, and a plurality of sliding materials at the bottom Adjacent to a plurality of frame bodies 4 to which 3 is fixed, and a restoration material 5 (see FIGS. 1 and 3) that connects the structural floor 11 and the frame body 4 and restores the displacement of the frame body 4 with respect to the structural floor 11. And a connecting member 6 (see FIGS. 1 and 2) for connecting the frame bodies 4 to each other.

  In the present embodiment, as shown in FIGS. 4 and 5, the four frame bodies 4 are arranged in one direction in the horizontal plane (hereinafter referred to as the X direction) and in a direction orthogonal to the X direction in the horizontal plane (hereinafter referred to as the following). Two in the Y direction). And as shown in FIG. 5, the four steel plates 2 are arranged in the upper part of the structure floor 11 at intervals so that these four frames 4 may be corresponded.

Returning to FIG. 1, the sliding seismic isolation mechanism 1 has a free access floor 7 on which equipment such as a server (not shown) is placed.
The free access floor 7 includes a floor panel 71 on which devices and the like are placed, and a plurality of support columns 72 that support the floor panel 71 from below. It is fixed to the upper part of the connecting material 6.

As shown in FIGS. 1 and 3, the steel plate 2 is an embossed steel plate having a substantially rectangular shape in plan view that is embossed so that fine protrusions protrude upward, and the range in which the frame 4 to which the sliding material 3 is fixed slides. It is formed in the above size and is fixed to the structural floor 11.
The space | interval of the adjacent steel plates 2 and 2 is set to the dimension in which the case 51 of the restoring material 5 can be installed.

As shown in FIGS. 1 to 3, in the frame body 4, a plurality of first frame body steels 41 extending in the Y direction and a plurality of second frame body steels 42 extending in the X direction are arranged in a lattice shape. It consists of a substantially rectangular member in plan view. The first frame shape steel 41 and the second frame shape steel 42 are formed of, for example, an H-shaped steel.
Moreover, in this embodiment, the some 1st frame body steel 41 is formed in the same length as the whole length of the Y direction of the frame body 4, respectively, and the 1st frame body steel 41 adjacent to a X direction is the same. A plurality of second frame structural steels 42 are arranged at intervals in the Y direction. The first frame body steel 41 and the second frame body steel 42 are joined or welded with a fixture, for example, via a plate material or the like. The first frame body steel 41 and the second frame body steel 42 are set so that the height of the upper surface is substantially the same.
And in this embodiment, it sets so that the space | interval of the 1st frame body steel 41 and 41 adjacent to a X direction may become a dimension of about twice the space | interval of the 2nd frame body steel 42 and 42 adjacent to a Y direction. Has been.

The sliding member 3 is a plate-like member having a substantially square shape in plan view with the surface direction being the horizontal direction, and is configured to be slidable on the upper portion of the steel plate 2 with the lower surface in contact with the upper surface of the steel plate 2.
The sliding member 3 is fixed to the lower surface of the joint portion 43 to which the second frame body steel 42 of the first frame body steel 41 is joined and to the approximate center in the X direction on the lower surface of the second frame body steel 42. ing. As shown in FIG. 6, in this embodiment, the sliding member 3 and the lower flange 46 of the first frame body steel 41 or the second frame body steel 42 are fixed by a fixture 31 such as a bolt and a nut. Yes.

Further, the frame body 4 extends in an oblique direction with respect to the X direction and the Y direction in a horizontal plane, and is substantially centered in the X direction of the joint portion 43 of the first frame body steel 41 and the second frame body steel 42. A plurality of brace members 44 (see FIG. 2) are provided.
As shown in FIG. 1, such a frame body 4 can move relative to the structural floor 11 in the horizontal direction by sliding on the steel plate 2 with the lower surface of the sliding material 3 in contact with the upper surface of the steel plate 2. It is configured.

As shown in FIGS. 1 and 3, the restoration material 5 includes a restoration spring 52 such as a constant load spring housed in a case 51 installed on the structural floor 11 at the outer periphery of the frame body 4, and a restoration spring. 52 and the wire 53 which connects the frame 4 to each other. As shown in FIG. 5, a plurality of restoration materials 5 are arranged on each of the four sides of the frame body 4, and are also arranged between the frame bodies 4 adjacent in the X direction and the Y direction. In the present embodiment, between the adjacent frame bodies 4, 4, the restoration material 5 connected to one adjacent frame body 4 and the restoration material 5 connected to the other frame body 4 are alternately arranged. Has been.
The restoring member 5 is provided with a pre-tensioning force as a preload to the restoring spring 52, and can restrain an excessive displacement of the frame body 4 when an earthquake occurs, and the displaced frame body 4 is placed in the original position. It is configured to be recoverable.

As shown in FIG. 4, the connecting member 6 includes a first connecting member 61 that connects the frames 4 and 4 adjacent in the X direction and a second connection that connects the frames 4 and 4 adjacent in the Y direction. Material 62.
Returning to FIG. 1, the first connecting member 61 is an upper part of the first frame body steels 41, 41 arranged at the end 4 a on the other frame body 4 side in the two frame bodies 4, 4 adjacent in the X direction. A pair of first connecting section steels 63, 63 extending in the Y direction and a pair of first connecting section steels 63, 63 connected to each other and extending in the X direction and spaced apart in the Y direction. The second connecting section steel 64, 64. These 1st connection section steel 63 and the 2nd connection section steel 64 are constituted by H section steel, for example.

The first connection shape steel 63 and the second connection shape steel 64 are joined or welded with a fixing tool via a plate material or the like, for example. The 1st connection shape steel 63 and the 2nd connection shape steel 64 are set so that the height of an upper surface may become substantially the same height.
And in this embodiment, while the space | interval of a pair of 1st connection structural steel 63 and 63 becomes a dimension substantially the same as the space | interval of the 1st frame body steel 41 and 41 adjacent to the X direction of the frame 4, Y direction The second connecting structural steels 64, 64 adjacent to each other are configured to have substantially the same dimensions as the adjacent second frame structural steels 42, 42 of the frame body 4. Moreover, the 2nd connection structural steel 64 is arrange | positioned so that the position of the 2nd frame structural steel 42 of the frame 4 and the position of a Y direction may become a substantially the same position, respectively.

In addition, in the first connecting member 61, in a horizontal plane, extending in an oblique direction with respect to the X direction and the Y direction, a joint portion to which the second connecting section steel 64 of the first connecting section steel 63 is joined, A plurality of brace members 65 (see FIG. 4) are provided to connect the second connection section steel 64 to the approximate center in the X direction.
In addition, these 1st connection structural steel 63, the 2nd connection structural steel 64, and the brace material 65 are arrange | positioned in the position which does not interfere with the decompression | restoration material 5. FIG.

As shown in FIG. 4, the second connecting member 62 is an upper portion of the second frame body steel 52 arranged at the end 4 b on the other frame body 4 side in the two frame bodies 4 and 4 adjacent in the Y direction. A pair of first connecting section steels 66, 66 extending in the X direction and fixed to each other, and a plurality of first connecting section steels 66, 66 connected to each other and extending in the Y direction and arranged at intervals in the X direction. Of the second connecting section steels 67, 67 ... and third connecting section steels 68, 68 ... of connecting the second connecting section steels 67, 67 extending in the X direction and adjacent to each other in the X direction. .
These 1st connection section steel 66, the 2nd connection section steel 67, and the 3rd connection section steel 68 are constituted by H section steel, for example.

The first connection shape steel 66 and the second connection shape steel 67 are joined or welded to each other by a fixture, for example, via a plate material, and the second connection shape steel 67 and the third connection shape steel 68. For example, it is joined or welded with a fixture via a plate material or the like. The first connecting section steel 66, the second connecting section steel 67, and the third connecting section steel 68 are set so that the height of the upper surface is substantially the same.
And in this embodiment, the space | interval of the Y direction of a pair of 1st connection structural steel 66,66 and the space | interval of the 2nd connection structural steel 67,67 adjacent to a X direction are adjacent to the X direction of the frame 4. FIG. It is comprised so that it may become a dimension substantially the same as the space | interval of the 1st frame body steel 41 and 41. FIG. Moreover, 2nd connection structural steel 67,67 ... is arrange | positioned so that the position of the 1st frame body steel 41 of the frame 4 and a X direction position may become a substantially the same position.
Moreover, as for the 3rd connection section steel 68,68 ..., each edge part is being fixed to the approximate center of the Y direction of the 2nd connection section steel 67.

In addition, in the second connecting member 62, in a horizontal plane, extending in an oblique direction with respect to the X direction and the Y direction, a joint portion to which the second connecting section steel 67 of the first connecting section steel 66 is joined, A plurality of brace members 69 that connect the approximate center of the third connecting section steel 68 in the Y direction are provided.
The first connecting section steel 66, the second connecting section steel 67, the third connecting section steel 68, and the brace material 69 are arranged at positions that do not interfere with the restoring material 5.

  Returning to FIG. 1, when the free access floor 7 is laid on the upper part of the sliding seismic isolation mechanism 1, the support 72 of the free access floor 7 is second above the first frame body steel 41 of the frame 4. It is comprised so that it may fix to the position 42a corresponding to the approximate center of the X direction of the 2nd frame shape steel 42 in the junction part 43 to which the frame shape steel 42 is joined, and the 2nd frame shape steel 42 upper part. In addition, the column 72 of the free access floor 7 is joined to the second connecting section steels 64 and 67 at the upper part of the first connecting section steels 63 and 66 of the first connecting section 61 and the second connecting section 62 of the connecting section 6. A position corresponding to the approximate center in the extending direction of the second connecting section steel 64, 67 at the upper part of the second connecting section steel 64, 67 and the upper part of the third connecting section steel 68 of the second connecting member 62; It is configured to be fixed at a position corresponding to the approximate center in the X direction of the three-linked section steel 68.

By arranging the struts 72 in this way, the distance between the struts 72 adjacent in the X direction and the Y direction can be made to be approximately the same size.
Further, among the plurality of support columns 72, those other than those arranged on the upper part of the connecting material 6 are arranged at positions corresponding to the vertical direction of the sliding material 3.

Next, the construction method of the above-described sliding seismic isolation mechanism 1 will be described.
(Steel plate installation process)
First, a plurality of steel plates 2 are arranged and fixed on the structural floor 11. At this time, a space in which the case 51 of the restoring material 5 can be installed is secured between the adjacent steel plates 2.
(Frame / restoration material installation process)
Subsequently, the frames 4 having the sliding material 3 fixed to the lower part are respectively installed on the steel plate 2. Then, the case 51 in which the restoring spring 52 of the restoring material 5 is accommodated is fixed to the structural floor 11 at the outer periphery of each frame 4, and the restoring spring 52 and the frame 4 are connected by the wire 53.

(Frame body connection process)
Subsequently, the frame bodies 4 adjacent in the X direction are connected by the first connecting member 61, and the frame bodies 4 adjacent in the Y direction are connected by the second connecting member 62. In addition, you may perform a frame body connection process, before installing the restoring material 5 of a frame and restoring material installation process.
(Free access floor laying process)
Subsequently, the column 72 of the free access floor 7 is fixed to the upper part of the frame body 4 and the connecting member 6, and the floor panel 71 is laid on the column 72.
In this way, the sliding seismic isolation mechanism 1 is constructed between the structural floor 11 and the free accelerator floor 7.

Next, the operation and effect of the above-described sliding seismic isolation mechanism 1 will be described with reference to the drawings.
In the sliding seismic isolation mechanism 1 according to the present embodiment, the frame body 4 in which the first frame body steel 41 and the second frame body steel 42 are arranged in a grid pattern supports the free access floor 7, and the frame body 4 is a thin plate. Compared to the above, the in-plane rigidity can be sufficiently secured even for a large load load, and even when a large bending force or tensile force is applied to the column 72 of the free access floor 7, it is difficult to deform. Even when the load is large, the free access floor 7 can be supported in a stable state.
Further, the support member 72 of the free access floor 7 is fixed to the upper portion of the frame body 4 at a position corresponding to the vertical direction of the slide member 3, so that the slide member 3 is attached to the free access floor 7 and the free access floor 7. It can bear the load of the equipment to be placed.

And since it is the structure by which the some frame 4 is connected with the connection material 6, even when the installation area which installs the free access floor 7 is large, it can respond by arranging the frame 4 in multiple numbers. .
In addition, since a space in which the case 51 of the restoration material 5 can be installed is provided between the adjacent frame bodies 4, one large frame body is installed at the installation location, and in the outer peripheral portion of the frame body Compared with the case of installing the case 51 of the restoration material 5, it is possible to secure a larger space in which the case 51 of the restoration material 5 can be installed. Therefore, the restoration material 5 has a large installation area and a large load. It is possible to deal with cases where there are a large number of.
As described above, the frame 4 can support the free access floor 7 in a stable state even when the load is large, and the plurality of frames 4 are connected by the connecting members 6 even when the installation area is large. Therefore, the sliding seismic isolation mechanism 1 can be installed between the structural floor 11 and the free access floor 7 even when the load is large or the installation area is large.
Further, in the sliding seismic isolation mechanism 1 according to the present embodiment, since a plurality of frames 4 are connected, the shape of the installation place is easily deformed when there is a crank or the like, or it can be easily added. It can correspond to.

In addition, since the frame body 4 and the connecting material 6 are provided with the brace materials 44, 65, and 69, the in-plane rigidity of the frame body 4 and the connecting material 6 can be further increased, and the free access floor 7 is provided. It can be supported in a more stable state.
In addition, the frame body 4 can be made of a member in which the first frame body steel 41 and the second frame body steel 42 are arranged in a lattice shape, whereby the in-plane rigidity of the frame body 4 can be further increased. The free access floor 7 can be supported in a more stable state.
Further, since the connecting member 6 is configured so that the support 72 of the free access floor 7 can be fixed to the upper part, the free access floor 7 laid on the upper part between the adjacent frames 4 and 4 is also reliably supported. can do.

As mentioned above, although embodiment of the sliding seismic isolation mechanism by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the above embodiment, four steel plates 2 and two frames 4 are arranged in the X direction and two in the Y direction, but the shape and number of the steel plates 2 and the frames 4 arranged are as follows. It may be set appropriately. A plurality of frames 4 may be arranged on one steel plate 2.
Moreover, in said embodiment, although the restoration | restoration material 5 has connected the structural floor 11 and the frame 4, the steel plate 2 installed in the structural floor 11 and the frame 4 may be connected.
In the above embodiment, the sliding material 3 slides on the steel plate 2, but the sliding material 3 may slide on a plate material instead of the steel plate 2.

Moreover, in said embodiment, although the frame 4 is formed with the shape steel, you may be formed with steel materials other than a shape steel. In addition, the frame 4 has a shape in which the shape steel is arranged in a lattice shape. However, if the frame 4 can support the free access floor 7 and devices placed on the free access floor 7, for example, the shape steel is viewed in plan view. It may be arranged in a hollow square.
Moreover, in said embodiment, although the brace material 44 is provided in the frame 4, it does not need to be provided.

Moreover, in said embodiment, although the connection material 6 is comprised with the shape steel extended in a X direction and a Y direction, it can connect the adjacent frame bodies 4 and is a structure which does not interfere with the decompression | restoration material 5. FIG. If there is, it may be set appropriately. Moreover, it is good also as a form which the support | pillar 72 of the free access floor 7 is not fixed.
Moreover, in said embodiment, although the restoring spring 52 is utilized as a restoring force of the restoring material 5, you may utilize elastic bodies other than a restoring spring. Moreover, the form of the restoration material 5 may be set as appropriate.

1 Sliding seismic isolation mechanism 2 Steel plate (plate material)
3 Sliding material 4 Frame 5 Restoring material 6 Connecting material 7 Free access floor 11 Structure floor (supporting part)
72 Prop 44, 65, 69 Brace material

Claims (5)

A plate material supported by the support part;
A plurality of frames arranged on top of the plate,
A plurality of sliding members fixed to a lower portion of the frame body, and slidably supporting the frame body on the plate material;
Connecting the support part or the plate member and the frame, and a restoring material made of an elastic body capable of restoring displacement of the frame relative to the support part;
A connecting member that connects the adjacent frames, and
On the upper part of the frame body, a free access floor column is fixed at a position corresponding to the vertical direction of the sliding material,
A sliding seismic isolation mechanism, wherein a space in which the restoration material can be installed is provided between the adjacent frames.   The sliding seismic isolation mechanism according to claim 1, wherein the frame is provided with a brace material.   3. The sliding seismic isolation mechanism according to claim 1 or 2, wherein the frame body is configured by members in which shape steels are arranged in a grid pattern.   The sliding seismic isolation mechanism according to any one of claims 1 to 3, wherein the connecting member is configured to be capable of fixing a column of the free access floor to an upper portion. In the construction method of the sliding seismic isolation mechanism which constructs the sliding seismic isolation mechanism according to any one of claims 1 to 4,
A plate material installation step of installing a plate material on which the sliding material can slide on the support;
A frame body / restoration material installation step in which the frame body to which the sliding material is fixed is arranged on the upper portion of the plate material and is arranged in a plurality and the support portion or the plate material and the frame body are connected by the restoration material;
A frame connecting step of connecting adjacent frames with the connecting material;
A free access floor laying step of laying the free access floor on top of the frame and the connecting material,
In the frame / restoring material installing step, the restoring material is installed in a space between the adjacent frame bodies.

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