JP2008280718A - Base isolation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliding bearing having protecting performance to fire, which can be applied to a middle-storied base-isolation building by capital base isolation or the like. <P>SOLUTION: A slide plate of the sliding bearing is divided to a flat central part with which a slider ordinarily contacts, and a flat outer circumferential part on the outside thereof, and the flat outer circumferential part is further divided to two or more parts. The divided slide plates are mounted on a common fixing frame, whereby the surfaces of the slide plates are flushed to each other. A fire resisting coating is applied onto the slider and the flat central part of the sliding plate, and the flat outer circumferential part is exposed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a slip-type seismic isolation device among seismic isolation devices that can safely protect a structure from an earthquake.

  The seismic isolation structure can reduce the shaking of the structure itself against strong earthquake motion during a large earthquake, so that not only the structural structure of the building but also the earthquake resistance of the entire building, including the internal housing such as furniture and equipment Can be increased.

  The seismic isolation structure was made possible due to the practical use of seismic isolation devices that can be displaced horizontally while supporting the weight of the structure. To date, laminated rubber-based seismic isolation devices, sliding seismic isolation devices, rolling Various seismic isolation devices have been developed, such as type seismic isolation devices.

  With the spread of seismic isolation structures, the types of seismic isolation structures have also diversified.At first, only the `` basic seismic isolation '' type in which seismic isolation devices were placed between the foundation and the structure, There are seismic isolation structures that place seismic isolation layers between the ground floors, those that place seismic isolation layers in the middle of the ground floor, or those that place seismic isolation devices in the middle of the pillars or on the heads of the middle floors of buildings. Has appeared. In the following, seismically isolated building types other than basic seismic isolation will be referred to as “middle floor seismic isolation”.

When adopting middle-floor seismic isolation in buildings, it is necessary to protect the seismic isolation device against the occurrence of a fire in the building. As seen in the patent literature shown below, laminated rubber has been used so far. Several fireproof coating methods have been developed (see Patent Documents 1 to 5).
JP-A-10-227152 Japanese Patent Laid-Open No. 11-071938 JP 2000-336799 A JP 2001-262735 A JP 2005-320744 A

  If the seismic isolation layer is composed only of laminated rubber, it is often difficult to extend the seismic isolation cycle to 4 seconds or more. Especially, as the weight of the seismic isolation building becomes lighter, such as middle and low-rise buildings, only the laminated rubber is used. Then, it becomes difficult to construct an effective seismic isolation structure.

  In addition to laminated rubber, this problem may be expressed by a slip-type seismic isolation device (hereinafter sometimes referred to as “sliding bearing”, both of which mean the same) or a rolling-type seismic isolation device (hereinafter “rolling bearing”). In some cases, hybrid-type seismic isolation systems that use a mixture of laminated rubber-based seismic isolation devices and sliding bearings are generally used. It is becoming.

  If this hybrid type seismic isolation system is applied to an intermediate floor seismic isolation building, the seismic isolation device requires a fireproof coating. A fireproof coating method for laminated rubber has already been developed, and there is no great difficulty, but the fireproof coating method for a sliding bearing is accompanied by a great difficulty.

The problems and problems of the fireproof coating method for sliding bearings are as follows.
(1) Since the slider and the sliding plate cause a large horizontal relative displacement, the fireproof coating should allow the displacement.
(2) Since the plane size of the slide plate is very large, it is necessary to cover a very large area with fireproof coating, and the slider moves while contacting the surface of the slide plate in the event of an earthquake. It is necessary to cover the surface of the sliding plate with fireproofing.
(3) If the fireproof coating covering the entire surface of the sliding plate is formed of a molded plate such as a silicate calcium plate, the fireproof coating moves with the movement of the slider, so that a very large space is required around it.
(4) Since there is a high possibility of encountering a fire after an earthquake, it is necessary to keep the fireproof coating properly even after an earthquake so that the fireproof coating does not fall off or break due to the vibration during the earthquake and the movement of the slider. There is.
(5) If the sliding plate or slider is damaged by a fire, it is necessary to replace the seismic isolation device (slider or sliding plate) while supporting the weight of the building.

  Since it is technically difficult to eliminate the above problems, an effective fireproof coating method for sliding bearings has not been developed so far.

  Therefore, the present invention intends to provide a rational “slip type seismic isolation device” that can be applied to an intermediate floor seismic isolation building and has fire resistance performance that can be used continuously as a seismic isolation structure even after encountering a fire. It is.

The present invention adopts the following configuration in order to solve the above points.
<Configuration 1>
A slip-type seismic isolation device comprising a sliding plate having a smooth surface and a slider that can move in a horizontal direction relative to the sliding plate, the sliding plate being in contact with the slider in normal times The sliding plate is divided into a flat central portion and a flat outer peripheral portion on the outside thereof, and the flat outer peripheral portion is divided into at least two portions, and the flat central portion and the flat outer peripheral portion of the sliding plate A seismic isolation device characterized by not touching.

  The sliding bearing is usually composed of two parts, “slip plate” and “slider”, but the present invention divides the slide plate into “plane central part” and “plane outer peripheral part”, and two or more plane outer peripheral parts. The basic principle for solving this problem is to divide into two.

  In the sliding bearing, since the first condition is that the slider can slide smoothly on the sliding plate, until now, it was considered that the sliding plate was a single large flat plate without any joints. The problem can be solved by denying this common sense.

  In the present invention, the sliding plate is divided into three or more parts (two or more divisions in the plane center portion and the outer peripheral portion). However, it is necessary to align the divided sliding plate surfaces at the same level. In order to satisfy this condition, configuration 2 is introduced.

<Configuration 2>
In the seismic isolation device of Configuration 1, a fixing member including an undivided fixing plate or an anchor frame for receiving the sliding plate divided into three or more parts is provided, and the fixing member is an upper structure or a lower structure It is driven in a state where the surface is exposed in the concrete housing of the body, and the surface of each of the divided sliding plates is adjusted to the same level by attaching the divided sliding plates to the fixing member. A seismic isolation device.

  That is, a “fixing frame” is prepared to fix the divided slide plates. Although the fixing frame may be a single fixing anchor plate, the anchor frame that receives the anchor bolt of the sliding plate mounting portion is basically used as a base. Here, both the anchor plate for anchoring and the anchor frame are referred to as a “fixing member”.

The fixing member is driven into the housing concrete of the upper structure or the lower structure with the surface of the attachment portion exposed. Since the fixing member is integrally formed without division, the level of the surface of the sliding plate can be made uniform by attaching the sliding plate divided to the fixing member with an anchor bolt.
In addition, at the time of the first new construction work, the fixing member and the slide plate can be driven into the concrete frame at the same time in a state in which the fixing member and the sliding plate are assembled together in advance with anchor bolts.

<Configuration 3>
In the seismic isolation device according to Configuration 1 or Configuration 2, a chamfering or taper is provided at a corner portion of the cross section of the sliding plate facing a dividing gap between the divided sliding plates. Seismic isolation device.

  In order for the sliding material of the slider to smoothly slide on the divided sliding plate, it is important that the sliding material does not get caught at the portion of the dividing gap. Therefore, by chamfering the cross-sectional corner of the dividing gap or by providing an oblique taper toward the dividing gap, the sliding material can easily overcome the dividing gap and pass through the dividing gap. Do not hurt.

<Configuration 4>
4. The seismic isolation device according to any one of configurations 1 to 3, wherein a fireproof heat insulating material is filled in a gap between the sliding plates.

  As shown in Configuration 1, the gap between the sliding plates at the center of the plane and the outer periphery of the plane is separated, and the two are not in contact with each other. The heat of the sliding plate is blocked by the existence of the dividing gap, and is not easily transmitted to the sliding plate at the center of the plane.

  Configuration 4 is a measure for further ensuring the heat insulating effect, and the dividing gap is filled with a heat insulating material having high fireproof and heat resistant performance. The presence of this refractory heat insulating material blocks the heat at the outer periphery of the plane from being transmitted to the slide plate at the center of the plane, so the slide plate at the center of the plane that is fireproof coated by the method shown in the following configuration 5 And it will surely protect the slider from fire and its heat.

<Configuration 5>
The seismic isolation device according to any one of Configurations 1 to 4, wherein a planar central portion of the slider and the sliding plate is covered with a fireproof coating.

  The fireproof coating of the sliding bearing according to the present invention is characterized in that only the flat central portion of the slider body and the sliding plate need be covered. Normally, the slider body is a single lump for both rigid and elastic sliding bearings, so it is easy to cover the surrounding side with fireproof coating, and the flat central part of the sliding plate is almost covered by the slider. Therefore, the flat central portion of the slide plate can be easily covered with the fireproof coating by extending the fireproof coating on the peripheral side surface of the slider until it contacts the slide plate.

  In order to reliably protect the flat central portion of the slip plate with the fireproof coating, it is desirable to cover the split gap portion between the flat central portion and the flat outer peripheral portion of the slip plate with the fireproof coating. Therefore, the fireproof coating of the slider reaches the flat outer peripheral portion of the sliding plate beyond the division gap.

  The present invention has a great feature and merit that the flat outer peripheral portion of the sliding plate having a large area need not be fireproof coated. In the event of a fire, the planar outer periphery of the sliding plate is directly exposed to the flame and is likely to be damaged by heat, but only the planar outer peripheral portion of the sliding plate needs to be replaced after the fire. Since the building weight is supported by the slider, the work of removing the fixing bolt of the flat outer peripheral slide plate and replacing it with a new flat outer peripheral slide plate can be easily performed.

<Configuration 6>
In the seismic isolation device according to Configuration 5, a fire-resistant and heat-insulated molded body is disposed on the side surface of the slider of the fire-resistant coating, and a boundary portion contacting the sliding plate at the tip thereof is made of a fiber-type heat insulating material. A fireproof thermal insulation pad forms a fireproof coating that is in close contact with the sliding plate and is movable, or foams when heated in the gap between the sliding plate at the tip of the fireproof thermal insulating molded body on the side of the slider. A foam-type fire-resistant and heat-insulating material that forms a fire-resistant and heat-insulating layer seal is disposed.

  In order to cover the slider with fireproofing, the side surface of the slider may be surrounded by a fireproof coating material. However, it is important to treat the portion of the slider side surface where the tip of the fireproof coating material contacts the sliding plate. That is, since the slider and the sliding plate move horizontally during an earthquake, it is necessary to allow this horizontal movement and to exhibit fireproof performance in the event of a fire.

  Therefore, in the present invention, an elastic fiber-type heat insulating material such as ceramic fiber is applied to a pad-shaped fire-resistant coating against a slight gap formed at a boundary portion contacting the sliding plate at the tip of the fire-resistant coating material on the side surface of the slider. A foaming refractory heat insulating material that foams and expands to form a seal of the refractory heat insulation layer when heated in a slight gap with the sliding plate at the tip of the material, or in a normal state is a slight gap. Thus, the fireproof coating is formed on the flat central portion of the slider and the sliding plate by the method of forming the fireproof coating seal part by heating and foaming in the event of a fire without disturbing the movement during an earthquake.

  Next, configurations 7 to 10 are shown as methods for protecting the entire sliding plate having a large area with a fireproof coating.

<Configuration 7>
In a slip-type seismic isolation device composed of a slide plate having a smooth surface and a slider that can move relative to the slide plate in a horizontal direction in contact with the slide plate, the slide plate is placed under the floor under the floor of the floor other than the foundation of the structure. The slider is attached to the upper part of the projecting structural frame (hereinafter referred to as “supporting column etc.”) instead of the column head of the column directly below the column, the upper part of the support column etc. directly below the slider, A seismic isolation device, characterized in that a fireproof and heat insulating member is disposed across a structural housing outside the outer peripheral portion of the sliding plate to cover the slider and the entire sliding plate with a fireproof coating.

  Configuration 7 shows the basic strategy for fireproof coating of the slider and the entire large area sliding plate. In other words, since the shape of the refractory coating attachment part becomes complicated when attempting to cover the slider itself with the refractory coating, the slider side is attached with the refractory coating on the lower structure itself such as the support pillar directly below the slider, and the sliding plate side is also attached. It is characterized by attaching a fireproof coating to the superstructure housing outside the sliding plate.

<Configuration 8>
In the seismic isolation device according to Configuration 7, a steel frame is fixed to an upper part of the support column and the like, and a fire-resistant and heat-insulated molded body such as a calcium silicate molded plate is attached to the outside of the steel frame, and the slip on the upper part thereof A fire-resistant coating that is in close contact with the sliding plate and is slidable by an elastic fire-resistant heat-insulating pad made of a fiber-type heat insulating material such as ceramic fiber is disposed at the boundary portion that contacts the plate, or is disposed on the steel frame. The fire-resistant coating is configured by placing a foam-type fire-resistant and heat-insulating material that is foamed by heating and forming a seal portion of the fire-resistant and heat-insulating layer in the gap between the fixed fire-resistant and heat-insulating molded body and the sliding plate. A seismic isolation device.

<Configuration 9>
In the seismic isolation device according to Configuration 7, a fire-resistant and heat-insulated molded body such as a calcium silicate molded plate, an ALC plate, or a reinforced concrete molded plate is attached to an upper portion of the support column or the like, and a boundary that contacts the sliding plate on the upper portion The portion is provided with a fire-resistant coating that is in close contact with the sliding plate by a resilient fire-resistant heat-insulating pad made of a fiber-type heat insulating material such as ceramic fiber, or is slidably movable, or the upper portion of the fire-resistant and heat-insulating molded body A seismic isolation device characterized in that a fireproof coating is formed by disposing a foam-type fire-resistant and heat-insulating material that foams by heating to form a seal portion of a fire-resistant and heat-insulating layer in a gap with a sliding plate.

<Configuration 10>
In the seismic isolation device according to Configuration 7, a fireproof material that is bent and stretchable by a fiber-type heat insulating material such as a ceramic fiber blanket over an upper portion of the support column and the structural casing outside the outer peripheral portion of the sliding plate. A seismic isolation device characterized in that a fireproof coating is formed of a heat insulating material.

  Configuration 8, Configuration 9, and Configuration 10 show features that specifically realize the fireproof coating of Configuration 7. In the configurations 8 and 9, since the fireproof coating material on the slider side surface and the bottom surface of the slide plate is solid, a slight gap is allowed to allow horizontal relative movement between the fireproof coating material and the upper slide plate or the lower surface of the upper structure. In order to seal the gap with a fireproof coating, a fireproof seal pad molded body made of ceramic fiber or the like is made, and the foam is formed by heating in the gap between the slide board or the method of sticking it to the slide board. A foam-type refractory heat insulating material that forms a seal portion of the refractory heat insulation layer is disposed, and a method of forming a refractory covering seal portion when receiving heat during a fire is adopted.

  In the configuration 10, the entire slider and the sliding plate can be completely wrapped by the fire-resistant and heat-insulating material having flexibility and elasticity, so that the fire-resistant coating for the gaps as in the above-described configurations 8 and 9 is unnecessary.

In configurations 7 to 10, the entire sliding bearing is covered with fireproof coating, so there is no problem if the entire sliding material is successfully protected from fire, but in the unlikely event that the sliding bearing is partially damaged, If the sliding plate is deformed due to the above, or if the sliding friction performance is changed, the apparatus needs to be replaced. In this case, it is not impossible to replace the apparatus, but a large-scale construction is required, and there remains a problem that it involves considerable difficulty.
Configurations 11 to 15 are methods that completely solve this problem.

<Configuration 11>
In a slip-type seismic isolation device composed of a slide plate having a smooth surface and a slider that can move relative to the slide plate in a horizontal direction in contact with the slide plate, the slider is a support column directly below, and the slide plate is It is attached to the upper structure, and the sliding plate is configured as a combination of a “surface sliding plate” that constitutes the sliding surface of the surface and a “back plate” that receives the surface sliding plate, and the surface sliding plate is Removably fixed to the back plate with a countersunk bolt or countersunk screw whose head does not protrude on the surface slip surface, and the surface slip plate is in contact with the slider in the normal state and on the outside The outer peripheral portion of the surface slip plate is divided into at least two portions, and the entire slip plate is entirely connected to the reinforcing bar component of the upper structure. Ried skeleton are implanted in the body, sliding-type isolator, which is characterized in that the outer peripheral portion surface and the surface slip plate surface of the outer upper structure of the sliding plate is finished at the same level.

  In configuration 11, the sliding plate is configured as a combination of a “surface sliding plate” and a “back plate” that constitutes the sliding surface, and the bolt head protrudes from the sliding surface by a countersunk bolt or countersunk screw on the back plate. Do not fix. The surface slip plate is divided into a flat central portion and two or more flat outer peripheral portions. The back plate is not divided, but is a common attachment member for fixing the surface slip plate and serves as a reinforcing plate. The entire sliding plate is driven into the upper concrete housing so that the surface of the sliding plate and the surface of the surrounding upper structural concrete housing are in the same plane.

  Accordingly, the entire sliding plate is protected by the concrete of the upper frame, and if a fireproof coating is applied to the surface of the sliding plate by the method of constitution 12 to constitution 15 shown below, it becomes a perfect protective measure against fire. Moreover, in the unlikely event that the surface of the slip plate is affected by the heat of the fire, it is possible to replace the surface slide plate on the outer periphery of the flat surface, making it a perfect fire countermeasure for the slide support. .

<Configuration 12>
In the seismic isolation device according to Configuration 11, a refractory heat insulating member is disposed across an upper portion of the support column or the like directly below the slider and a structural housing outside the outer peripheral portion of the sliding plate, and the slider and the entire sliding plate are disposed over the entire surface. Seismic isolation device characterized by fireproof coating.

<Configuration 13>
In the seismic isolation device according to Configuration 12, a steel frame is fixed to an upper portion of the support pillar and the like, and a fireproof and heat insulating molded body such as a calcium silicate molded plate is attached to the outside of the steel frame, and the slip on the upper portion thereof A fire-resistant coating that is in close contact with the sliding plate and is slidable by an elastic fire-resistant heat-insulating pad made of a fiber-type heat insulating material such as ceramic fiber is disposed at the boundary portion that contacts the plate, or is disposed on the steel frame. The fire-resistant coating is configured by placing a foam-type fire-resistant and heat-insulating material that foams by heating to form a seal portion of the fire-resistant and heat-insulating layer in the gap between the fixed fire-resistant and heat-insulating molded body and the sliding plate. A seismic isolation device.

<Configuration 14>
The seismic isolation device according to Configuration 12, wherein a fire-resistant and heat-insulating molded body such as a calcium silicate molded plate, an ALC plate, or a reinforced concrete molded plate is attached to an upper portion of the support column or the like, and a boundary in contact with the sliding plate on the upper portion The portion is provided with a fire-resistant coating that adheres to the sliding plate and is movable by a fire-resistant and heat-insulating molded body having elasticity such as a fiber type heat insulating material of ceramic fiber, or on the top of the fire-resistant and heat-insulating molded body. A seismic isolation device, wherein a fireproof coating is formed by disposing a foamed fireproof heat insulating material that foams by heating to form a seal portion of a fireproof heat insulating layer in a gap with the sliding plate.

<Configuration 15>
In the seismic isolation device according to Configuration 12, a fire-resistant and heat-insulating material that is bent and stretchable by a fiber-type heat insulating material such as a ceramic fiber blanket across the upper portion of the support column and the structural casing outside the outer periphery of the sliding plate A seismic isolation device comprising a fireproof coating.

  The configuration 12 shows the basic strategy of the fireproof coating for the sliding bearing of the configuration 11, and the configurations 13 to 15 show a specific method for realizing the fireproof coating. The construction method of the fireproof coating is basically the same as the configuration 8, the configuration 14 is the configuration 9, the configuration 15 is the same as the configuration 10, but the sliding plate surface and the surrounding upper structure surface are the same. Since it is configured at the same level, a more reasonable fit can be configured.

<Configuration 16>
The seismic isolation device according to Configuration 11, wherein a fireproof and heat insulating material is raised from an upper part of the support column or the like, and a flat central portion of the slider and the surface slip plate is fireproofed.

  Configuration 16 is a simplification of the fireproof coating shown in Configurations 12 to 15, and applies the same method as in Configurations 5 to 6. Thereby, the fire protection method with respect to the seismic isolation device of the structure 11 is made more realistic.

  Hereinafter, the present invention will be described with reference to the drawings illustrating embodiments. In addition, the same code | symbol is attached | subjected to the common part.

FIG. 1 is a diagram showing an embodiment in which the configuration 1 of the present invention is applied to an elastic sliding bearing. FIG. 1 (1) is a plan view (looking up) of the sliding plate, and FIG. 1 (2) is a sectional view. is there.
FIG. 1 shows a case where the sliding plate 4 is located on the upper side of the slider 3 for the stigma isolation. An elastic sliding support slider 3 is mounted on a column head or a supporting column, and a sliding plate 4 is placed downward on the slider 3 and fixed to the upper concrete footing 2.

The sliding plate 4 is composed of a circular flat central portion 41 and two flat outer peripheral portions 42 on the outside thereof, and the sliding plate 4 is divided into three parts as a whole. A slight gap 5 is provided between the three sliding plates. In particular, in the divided gap 5 between the flat central portion and the flat outer peripheral portion, the flat central portion sliding plate from the flat outer peripheral sliding plate 42 in the event of a fire. In order to block the heat transfer to 41, a gap larger than the division gap between the outer peripheral portions of the plane is secured.
The “elastic sliding bearing” is a sliding bearing having an elastic body portion that can horizontally deform the slider, and reference numeral 32 in FIG. 1 (2) constitutes a laminated rubber portion, which is elastic. It is the part responsible for deformation. On the other hand, a sliding bearing that does not have an elastic bearing portion and is composed of a rigid body in which the slider is not elastically deformed is called a “rigid sliding bearing”.

FIG. 2 is a diagram showing an embodiment in which the configuration 1 of the present invention is applied to a sliding bearing with a rotation mechanism, which is a representative of a rigid sliding bearing, and FIG. 2 (1) is a plan view (looking up) of the sliding plate. FIG. 2B is a cross-sectional view. FIG. 2 shows the case of the stigma isolation etc. in which the sliding plate 4 is arranged on the upper side of the slider, as in the first embodiment.
A slider 33 of a sliding bearing with a rotation mechanism is embedded in the pillar head concrete, and the sliding plate 4 is placed downward on the concrete and fixed to the upper concrete footing 2.

  The sliding plate 4 is divided into three parts, that is, a flat central part 41 and two flat outer peripheral parts 42 on the outside thereof. The flat central part 41 has a square shape. In the dividing gap 5 between the flat central portion 41 and the flat outer peripheral portion 42, a gap is secured to block heat transfer from the flat outer peripheral slide plate 42 to the flat central slide plate 41 during a fire. . The dividing gap 5 between the plane outer peripheral portions 42 does not have to be large, but a clearance for the clearance allowance is secured in consideration of expansion deformation due to heating during a fire.

  FIG. 3 is a view showing an embodiment of the configuration 2 that explains how to attach and fix the sliding plate. FIG. 3 (1) is a plan view (looking up) of the sliding plate, and FIG. 3 (2) is a sectional view. It is. In the right shoulder of FIG. 3 (2), an enlarged view of a part of (2) is shown.

The fixing frame 43 is driven into the concrete of the upper structure 2. The sliding plate 4 divided into the flat central portion 41 and the flat outer peripheral portion 42 is attached to the fixing frame 43 by a flat bolt 44.
A cap nut 45 is attached to the fixing frame 43. By removing the cap nut 45, the flat outer peripheral portion 42 of the sliding plate can be replaced even after the building is completed.
In this figure, only the fixing frame 43 is driven into the concrete housing, and the sliding plate 4 is exposed, but the sliding plate 4 may be driven into the concrete housing.

FIG. 4 is a diagram showing an example of configurations 3 and 4 of the present invention, and FIGS. 4A to 4D are cross-sectional views showing an enlarged part of the sliding plate.
Since the divided sliding plates 4 are fixed to the common fixing frame 43, the surfaces of the sliding surfaces are at the same level.
4A and 4B show an embodiment of Configuration 3. FIG. Configuration 3 is a measure in which the sliding material fixed to the slider can smoothly move on the sliding plate. 4A shows a case where a “taper” 52 is provided at the boundary portion facing the dividing gap 5 at the end of the sliding plate, and FIG. Each case is shown. By providing the taper 52 or the chamfer 51, the sliding material can pass smoothly without damaging the boundary portion of the sliding plate.

  4 (C) and 4 (D) show an embodiment of Configuration 4. FIG. In order to block heat transfer from the flat outer peripheral portion 42 of the sliding plate separated by the divided gap 5 to the flat central portion 41 in the event of a fire, the divided gap 5 is filled with a refractory heat insulating material 53.

FIG. 5 is a diagram showing an embodiment of the configuration 5 of the present invention, and FIG. 5 (1) is a cross-sectional view showing the configuration 5 of the present invention applied to an elastic sliding bearing. In this embodiment, the slider 3 and the flat central portion 41 of the sliding plate are covered with fireproof, and the flat outer peripheral portion 42 of the sliding plate is exposed without applying fireproof coating.
Since the slider 3 of the elastic sliding bearing undergoes horizontal shear deformation during an earthquake, a clearance 54 for absorbing the deformation of the slider is secured between the fireproof coating on the side of the slider and the slider 3.

FIG. 5 (2) is a cross-sectional view showing a configuration in which the configuration 5 of the present invention is applied to a rigid sliding bearing (in this example, a sliding bearing with a rotation mechanism). Since most of the slider body 33 is embedded in the support column concrete of the lower structure, the slider side surface and the flat central portion 41 of the sliding plate are surrounded by a fireproof coating.
According to the present invention, as can be seen from FIGS. 5 (1) and (2), it is possible to protect the sliding bearing with a small amount of fireproof coating. It has become. In the unlikely event of a fire, the flat outer peripheral portion 42 of the sliding plate and the fireproof coating can be easily replaced with new ones after the fire.

FIG. 6 is a diagram showing an example of the configuration 6 of the present invention, and shows a specific configuration method of the fireproof coating. FIG. 6A is a cross-sectional view showing the configuration of the fireproof coating for the elastic sliding bearing, and FIG. 6B is a cross-sectional view showing the configuration of the fireproof coating for the rigid sliding bearing. In either case, the side surface of the slider is made of a fireproof coated side surface made of a solid fireproof heat insulating molded plate 61 such as a calcium silicate plate, and a stretchable fireproof seal pad 62 is arranged at the contact portion with the sliding plate 4 on the upper side. Yes.
With this fireproof seal pad 62, it is possible to move horizontally with respect to the slip plate in the event of an earthquake while maintaining a fireproof covering function in close contact with the slip plate.

  (1)-(3) of FIG. 7 is sectional drawing which shows the Example of the structure 7-10 which protects the whole slide support including a large area slip board with a fireproof coating.

  FIG. 7 (1) shows an embodiment of Configuration 8. In this embodiment, a steel frame 63a is fixed to the upper part of a support column or the like, and a fireproof heat insulating molded body 63b such as a calcium silicate molded plate is attached to the outside thereof to constitute a fireproof coating 63. The structure of the coating itself is protected from being destroyed by a fire.

  FIG. 7B shows an embodiment of configuration 9. In this embodiment, a fireproof coating 64 is formed by attaching a fireproof and heat insulating molded body such as a calcium silicate molded plate, an ALC plate, or a reinforced concrete molded plate to the upper part of a support column or the like.

  In the configuration 8 and the configuration 9, since the fireproof coating material on the slider side surface and the bottom surface of the slide plate is solid, a slight amount of horizontal relative movement is allowed between the fireproof coating material and the upper slide plate or the lower surface of the upper structure. In order to provide a gap and to cover this gap with fireproofing, either a method in which an elastic fireproof seal pad molded body made of ceramic fiber or the like is interposed and adhered to the sliding plate, or heat-foamed in the gap between the sliding plate and fireproofing. A foam-type fire-resistant and heat-insulating material that forms a heat-insulating layer is disposed, and a fire-resistant seal is formed by foaming by heating in the event of a fire.

  FIG. 7 (3) shows an example of the configuration 10. In this embodiment, the refractory coating 65 is made of a fire-resistant and heat-insulating material that is bent and stretched by a fiber-type heat-insulating material such as a ceramic fiber blanket.

FIGS. 8A and 8B are views showing an embodiment of the structure 11 of the present invention. FIG. 8A is a plan view (looking up) of the sliding plate, and FIG. 8B is a cross-sectional view thereof.
In the embodiment of the structure 11, the sliding surface of the sliding plate 4 is configured as a combination of the “surface sliding plate 4a” and the “back plate 4b”. A plurality of cap nuts 45 are welded to the back plate 4b, and the surface slip plate 4a can be fixed to the back plate 4b by screwing a flat head bolt 44 from above (outside) the surface slide plate 4a. A stat bolt 46 is welded to the back plate 4b, and the back plate 4b is fixed in the concrete 2 of the upper structure by the stud bolt. As a result, the entire slide plate 4 is fixed to the upper structure 2.

  The surface slip plate 4a is divided into a plane central portion 41 and two or more plane outer peripheral portions 42, but the back plate 4b is not divided, so that the surface level of the surface slip plate 4a is the same, and the slip It is driven into the upper concrete housing so that the surface of the plate surface and the surrounding upper structural concrete housing 21 are flush with each other.

The seismic isolation device of this example is advantageous from the viewpoint of fire resistance because the entire sliding plate is driven into the concrete frame, and since the sliding plate surface and the surrounding concrete surface are at the same level, Even if a slip displacement exceeding the slip plate range occurs due to an earthquake input exceeding the design assumption, no abnormality occurs, and the seismic isolation device has high safety performance from the viewpoint of seismic safety performance.
Further, the planar outer peripheral portion 42 of the surface slip plate can be replaced as it is without jacking up, and is an excellent seismic isolation device from the viewpoint of fire resistance, durability performance and maintenance.

  (1) to (3) in FIG. 9 are cross-sectional views showing examples of configurations 12 to 15 that protect the entire sliding bearing including the sliding plate with a fireproof coating for the seismic isolation device of configuration 11. .

FIG. 9 (1) shows an example of the configuration 13. In this embodiment, a steel frame is fixed to an upper portion of a support column or the like, and a fireproof and heat insulating molded body such as a calcium silicate molded plate is attached to the outside thereof to constitute a fireproof coating 63.
In the gap between the upper end of the fireproof coating 63 and the bottom surface (the same level as the sliding surface) of the upper housing 21, a thin film body 67 of a foam-type fireproof heat insulating material is disposed to constitute a fireproof seal portion. The thin film body 67 of the foam-type fire-resistant and heat-insulating material can be moved horizontally without contact in the event of an earthquake, and forms a fire-resistant seal by foaming by receiving heat in the event of a fire, thereby completing the fire-resistant coating of the entire device. .

FIG. 9 (2) shows an example of the configuration 14. In this embodiment, a fireproof coating 64 is configured by attaching a fireproof and heat insulating molded body such as a calcium silicate molded plate, an ALC plate, or a reinforced concrete molded plate to the upper portion of a support column or the like.
In the gap between the upper end of the fireproof coating 64 and the bottom surface of the upper housing 21 (the same level as the sliding surface), a resilient fireproof seal pad 62 made of ceramic fiber or the like is disposed. The fireproof seal pad 62 employs a fireproof coating method that allows horizontal sliding movement while in contact with the slide plate during an earthquake.

  FIG. 9 (3) shows an example of the configuration 15. In this embodiment, the refractory coating 65 is made of a fire-resistant and heat-insulating material that is bent and stretched by a fiber-type heat-insulating material such as a ceramic fiber blanket. This fireproof coating 65 can allow horizontal relative movement between the support column and the upper structure due to deformation of the fireproof coating material during an earthquake.

  As described above, the sliding type seismic isolation devices having the configurations 11 to 15 shown in FIGS. 9 (1) to 9 (3) have extremely high protection performance against fire, and at the same time, damage and influence are caused by the fire. It can be replaced without jacking up, and has achieved unprecedented performance and characteristics in terms of both fire and safety performance.

  Although the fireproof coatings of the structures 12 to 15 are complete with respect to the seismic isolation device of the structure 11, the structure 16 is simple because this fire protection measure is simple because it is quite heavy equipment. Although the embodiment is omitted, it can be considered that the sliding plate 4 in FIGS. 5 and 6 is similar to the state in which the sliding plate 4 is driven into the upper casing so that the surface becomes the same level.

  In conventional seismic isolation structures, only laminated rubber can be used as a seismic isolation device in the middle floor seismic isolation structure and the stigma isolation structure due to fireproof protection restrictions. A practical fireproof protection method is now possible. Therefore, by freely using both laminated rubber bearings and sliding bearings, in the future, the degree of design freedom for middle-floor seismic isolation buildings and stigma-isolated buildings will increase dramatically, greatly increasing the spread and development of seismic isolation structures. It can be expected to contribute.

The figure which shows Example 1 shows the structure at the time of applying the structure 1 of this invention to an elastic sliding bearing, (1) The top view (looking up figure) of the divided | segmented sliding board, (2) Attachment of a seismic isolation device It is sectional drawing which shows a state and a structure. The figure which shows Example 2 shows the structure at the time of applying the structure 1 of this invention to a rigid sliding bearing, (1) The top view (looking up figure) of the divided | segmented sliding board, (2) Attachment of a seismic isolation device It is sectional drawing which shows a state and a structure. Example 3 shows the configuration 2 of the present invention, and shows a mounting method that maintains the same surface level of the divided sliding plate and enables the sliding plate to be attached and detached. (1) The divided sliding plate and (2) It is sectional drawing which shows the attachment method of the seismic isolation device, especially a sliding board, and the attachment / detachment method. Example 4, sectional views showing Configuration 3 and Configuration 4 of the present invention and partial enlarged views of each part are shown. (A) is a partial enlarged sectional view in which a taper is provided at a sliding plate corner facing the dividing gap of Configuration 3. (B) is a partially enlarged cross-sectional view in which a chamfer is provided at a sliding plate corner facing the dividing gap of configuration 3, (C) is a partially enlarged cross-sectional view in which a dividing gap having a taper of configuration 4 is filled with a refractory heat insulating material, (D) is the elements on larger scale which filled the division clearance which has the chamfer of the structure 4 with the fireproof heat insulation material. 5 is a cross-sectional view showing a configuration 5 of the present invention, (1) a cross-sectional view when a fireproof coating is applied to an elastic sliding bearing, and (2) a cross-sectional view when a fireproof coating is applied to a rigid slide support. . EXAMPLE 6 It is sectional drawing which shows the structure 6 of this invention, (1) Cross-sectional view which shows the cross-sectional structure of the fireproof coating performed on an elastic sliding bearing, (2) Cross-sectional view which shows the cross-sectional structure of the fireproof coating performed on a rigid sliding bearing It is. FIG. 7 is a cross-sectional view showing a method for fireproof covering the entire sliding bearing of the seventh embodiment and the seventh to tenth embodiments of the present invention, and shows the case where the slider is an elastic sliding bearing, but the same applies to the case of a rigid sliding bearing. Yes, (1) A cross-sectional view showing an example of a case where a fireproof coating is constituted by a steel frame + solid molded plate type fireproof coating, (2) a case where a fireproof coating is constituted by a solid fireproof insulating material such as an ALC plate or an RC plate Sectional drawing which shows an example, (3) It is sectional drawing which shows the example in the case of comprising a fireproof coating with the fiber-type heat insulation material which can be bent. FIG. 8 is a diagram showing the configuration 11 of the eighth embodiment of the present invention, in which the sliding plate is configured by a combination of a surface sliding plate and a back plate, and the sliding surface of the surface sliding plate and the surrounding concrete frame surface are configured at the same level. (1) A plan view (look-up view) showing a divided slide plate and its surroundings, (2) A cross-sectional view showing a cross-sectional configuration of the seismic isolation device, particularly a positional relationship with a surrounding casing. It is sectional drawing which shows the method of carrying out the fireproof coating of the whole sliding bearing of the structure 12-the structure 15 with respect to the seismic isolation apparatus of Example 9, the structure 11 of this invention, (1) Solid molded board type fireproof coating to a steel frame A cross-sectional view showing an example in which a fireproof coating is constructed by combining the above and a fireproof insulation seal made of foam-type material is combined in the gap between the upper casing of the fireproof coating and (2) solid fireproof such as an ALC plate or RC plate A cross-sectional view showing an example in which a fireproof coating is formed of a heat insulating material, and an elastic fireproof heat insulating seal pad made of a ceramic fiber or the like is combined with a gap between the upper end of the fireproof coating and an upper housing. (3) Bendable fiber It is sectional drawing which shows the example in the case of comprising a fireproof coating with a type | mold heat insulation material.

Explanation of symbols

1: Support column, etc. (lower column or support structure housing for mounting slide support slider)
2: Upper structure (basic footing frame of the upper structure that fixes the sliding plate)
21: Basic footing housing of the upper structure surrounding the slide plate at the same level as the surface of the slide plate 3: Slide slider of the slide bearing 31: Slide material 32: Elastic support portion of the elastic slide support slider 33: Rigid slide bearing (in this example Support part of slide support with rotation mechanism 4: Slide plate 4a: Surface slip plate 4b: Back plate 41: Plane center portion of slide plate 42: Plane outer peripheral portion of slide plate 43: Fixing frame (attach slide support material) Plate for fixing or anchor frame for fixing)
44: Countersunk screw or countersunk bolt (fixing bolt that integrates the sliding plate and the back plate. The bolt head does not protrude from the sliding plate surface.)
45: Cap nut 46: Stud bolt 5: Dividing gap 51: Chamfering at the boundary with the dividing gap of the sliding plate 52: Taper at the boundary with the dividing gap of the sliding plate 53: Refractory heat insulating material filled in the dividing gap 54 : Clearance between fireproof coating and elastic sliding bearing slider 6: Fireproof coating 61: Fireproof coating body around the slider (calcium silicate plate, etc.)
62: Fireproof seal pad: Fireproof seal material with flexibility (stretch elasticity) to be placed in contact with the sliding plate of the fireproof coating 63: Fireproof coating (1) (steel frame receiving fireproof coating material) surrounding the entire sliding support + Fireproof coated molded board (calcium silicate board, etc.)
64: Fireproof coating that surrounds the entire sliding bearing (2) (Single fireproof coating material (ALC plate, concrete plate, etc.) + Fireproof seal pad in contact with the sliding plate)
65: Fireproof coating that surrounds the entire sliding bearing (3) (stretchable and flexible fireproof coating material (when using ceramic fiber blankets, etc.)
66: Range when the entire sliding plate is surrounded by fireproof coating 67: Thin film body of foam-type fireproof heat insulating material

Claims (16)

A sliding plate having a smooth surface;
A slip-type seismic isolation device including a slider that can move in a horizontal direction relative to the sliding plate,
The sliding plate is divided into a flat central portion of the sliding plate that is in contact with the slider in normal times and a flat outer peripheral portion on the outside thereof.
The planar perimeter is divided into at least two parts;
The seismic isolation device, wherein the flat central portion of the sliding plate and the flat outer peripheral portion are not in contact with each other. In the seismic isolation device of claim 1,
Providing a fixing member including a non-divided fixing plate or a fixing anchor frame for receiving the sliding plate divided into three or more parts;
The fixing member is driven in a state where the surface is exposed in the concrete casing of the upper structure or the lower structure,
A seismic isolation device characterized in that the surface of each of the divided sliding plates is adjusted to the same level by attaching the divided sliding plates to the fixing member. In the seismic isolation device according to claim 1 or 2,
A seismic isolation device, wherein a chamfer or a taper is provided in a cross-sectional corner portion of the sliding plate facing a gap between the divided sliding plates (hereinafter referred to as “divided gap”). In the seismic isolation apparatus in any one of Claim 1 thru | or 3,
A seismic isolation device, characterized in that a fireproof and heat insulating material is filled in the gap between the sliding plates. In the seismic isolation apparatus according to any one of claims 1 to 4,
A seismic isolation device characterized in that a flat central portion of the slider and the sliding plate is fireproof coated. In the seismic isolation device according to claim 5,
A fire-resistant and heat-insulating molded body is disposed on the slider side surface of the fire-resistant coating,
The boundary portion that contacts the sliding plate at the tip thereof constitutes a fire-resistant coating that is in close contact with the sliding plate and is capable of sliding movement by an elastic fire-resistant heat-insulating pad made of a fiber type heat insulating material,
Alternatively, a foam-type fire-resistant and heat-insulating material that foams to form a fire-resistant and heat-insulating layer seal when heated is disposed in a gap between the slider and the slide plate at the tip of the fire-resistant and heat-insulated molded body. Seismic device. In a slip-type seismic isolation device composed of a slide plate having a smooth surface and a slider that can move relative to the slide plate in a horizontal direction in contact with the slide plate,
Attach the sliding plate downward to the bottom floor of the middle floor other than the foundation of the structure,
Attach the slider to the top of the column head immediately below it or the upper part of the protruding structural frame that replaces the column (hereinafter referred to as “support column etc.”)
A fire-resistant and heat-insulating member is disposed across the upper part of the support column and the like directly below the slider and a structural housing outside the outer peripheral portion of the sliding plate to cover the entire surface of the slider and the sliding plate. Seismic isolation device. In the seismic isolation device according to claim 7,
Fix the steel frame to the upper part of the support pillar etc.,
A fireproof and heat-resistant molded body is attached to the outside of the steel frame,
The boundary part that contacts the sliding plate on the upper part is arranged with a fireproof coating that is in close contact with the sliding plate by a resilient fireproof thermal insulating pad made of fiber-type heat insulating material and is capable of sliding.
Alternatively, a fire-resistant coating is provided by placing a foam-type fire-resistant and heat-insulating material that forms a seal portion of the fire-resistant and heat-insulating layer by foaming by heating in a gap between the upper part of the fire-resistant and heat-insulated molded body fixed to the steel frame. A seismic isolation device characterized by comprising. In the seismic isolation device according to claim 7,
A fireproof and heat-insulated molded body of either a calcium silicate molded plate, an ALC plate, or a reinforced concrete molded plate is attached to the upper portion of the support pillar, etc.
The boundary part that contacts the sliding plate on the upper part is arranged with a fireproof coating that is in close contact with the sliding plate by a resilient fireproof thermal insulating pad made of fiber-type heat insulating material and is capable of sliding.
Alternatively, a fire-resistant coating is formed by placing a foam-type fire-resistant and heat-insulating material that foams by heating to form a seal portion of the fire-resistant and heat-insulating layer in a gap between the upper part of the fire-resistant and heat-insulated molded body and the sliding plate. A seismic isolation device. In the seismic isolation device according to claim 7,
A fire-resistant coating is formed of a fire-resistant and heat-insulating material that is bent and stretched by a fiber-type heat-insulating material or the like across the upper part of the support column and the structural casing outside the outer peripheral portion of the sliding plate. Seismic isolation device. In a slip-type seismic isolation device composed of a slide plate having a smooth surface and a slider that can move relative to the slide plate in a horizontal direction in contact with the slide plate,
The sliding plate is attached to the upper structure, and the slider is attached to the support pillar directly below it,
The sliding plate is configured as a combination of a “surface sliding plate” that constitutes the sliding surface of the surface and a “back plate” that receives the surface sliding plate,
The surface slip plate is detachably fixed to the back plate with a countersunk bolt or countersunk head whose head does not protrude on the surface slip surface,
The surface slip plate is divided so as to be divided into a flat central portion that is in contact with the slider in a normal state and a flat outer peripheral portion on the outside thereof and not to come into contact with the slider,
And the plane outer peripheral part of the said surface slip board is divided | segmented into at least 2 parts or more,
The entire sliding plate is driven into the reinforced concrete housing of the upper structure,
The seismic isolation device characterized in that the surface of the upper structure outside the outer peripheral portion of the sliding plate and the surface of the surface sliding plate are finished at the same level. The seismic isolation device according to claim 11,
A fire-resistant and heat-insulating member is disposed across the upper part of the support column and the like directly below the slider and a structural housing outside the outer peripheral portion of the sliding plate to cover the entire surface of the slider and the sliding plate. Seismic isolation device. The seismic isolation device according to claim 12,
Fix the steel frame to the upper part of the support pillar etc.,
A fireproof and heat-resistant molded body is attached to the outside of the steel frame,
The boundary part that contacts the sliding plate on the upper part is arranged with a fireproof coating that is in close contact with the sliding plate by a resilient fireproof thermal insulating pad made of fiber-type heat insulating material and is capable of sliding.
Alternatively, a fire-resistant coating is provided by placing a foam-type fire-resistant and heat-insulating material that forms a seal portion of the fire-resistant and heat-insulating layer by foaming by heating in a gap between the upper part of the fire-resistant and heat-insulated molded body fixed to the steel frame. A seismic isolation device characterized by comprising. The seismic isolation device according to claim 12,
A fireproof and heat-insulated molded body of either a calcium silicate molded plate, an ALC plate, or a reinforced concrete molded plate is attached to the upper portion of the support pillar, etc.
Whether or not the upper part of the boundary contacting the sliding plate is provided with a fire-resistant coating that is in close contact with the sliding plate by a resilient fire-resistant and heat-insulating pad and is movable.
Alternatively, a fire-resistant coating is formed by placing a foam-type fire-resistant and heat-insulating material that foams by heating to form a seal portion of the fire-resistant and heat-insulating layer in a gap between the upper part of the fire-resistant and heat-insulated molded body and the sliding plate. A seismic isolation device. The seismic isolation device according to claim 12,
A seismic isolation device characterized in that a fireproof coating is formed of a fire-resistant and heat-insulating material that is bent and stretched by a fiber-type heat-insulating material, straddling the upper part of the support pillar and the like and a structural housing outside the outer periphery of the sliding plate . The seismic isolation device according to claim 11,
Fire-resistant and heat-insulating material is launched from the upper part of the support pillar, etc.
A seismic isolation device characterized in that a flat central portion of the slider and the surface slip plate is fireproof coated.

Images