JP5356743B2 - Fireproof coating structure for seismic isolation devices - Google Patents

Fireproof coating structure for seismic isolation devices Download PDF

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JP5356743B2
JP5356743B2 JP2008183418A JP2008183418A JP5356743B2 JP 5356743 B2 JP5356743 B2 JP 5356743B2 JP 2008183418 A JP2008183418 A JP 2008183418A JP 2008183418 A JP2008183418 A JP 2008183418A JP 5356743 B2 JP5356743 B2 JP 5356743B2
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seismic isolation
sliding
isolation device
refractory material
sliding plate
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JP2010024617A (en
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信治 中田
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Asahi Kasei Homes Corp
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Description

本発明は、すべり材とすべり板とを有するすべり支承型の免震装置の耐火被覆構造に関するものである。   The present invention relates to a fireproof covering structure for a sliding support type seismic isolation device having a sliding material and a sliding plate.

一般にすべり支承型の免震装置は、すべり材がすべり板の上面を滑らかに摺動するように摩擦抵抗の小さな樹脂や金属で構成されている。免震装置を備えた免震建物を法令で定められた耐火建築物とする場合、この免震装置にも建物の構造体と同等の耐火性能が求められるので、耐火性を有する材料で被覆する必要がある。   In general, a sliding support type seismic isolation device is made of a resin or metal having a low frictional resistance so that the sliding material slides smoothly on the upper surface of the sliding plate. When a seismic isolation building equipped with a seismic isolation device is a fireproof building specified by law, this seismic isolation device is also required to have a fire resistance equivalent to the structure of the building, so it is covered with a fireproof material. There is a need.

免震建物は、地震時にはすべり材とすべり板との接触部分以外は非接触状態が維持されながらも、火災時には樹脂部分や金属部分が耐火材料で隙間なく被覆される必要がある。このような条件を満たす技術が特許文献１に記載されている。特許文献１に記載の免震装置によれば、支持柱の上部に珪酸カルシウム成形板等の耐火断熱成形体を取り付けて耐火被覆を構成し、耐火被覆と上部躯体との隙間に熱を受けて発泡する発泡型耐火断熱性材料の薄膜体を配置することによって、地震時には免震機能が発揮され、火災時には火炎の影響を受けない免震装置とすることが可能である。   In the case of an earthquake-isolated building, the non-contact state is maintained except for the contact portion between the sliding material and the sliding plate in the event of an earthquake, but in the event of a fire, the resin portion and the metal portion must be covered with a refractory material without gaps. A technique that satisfies such conditions is described in Patent Document 1. According to the seismic isolation apparatus described in Patent Document 1, a fireproof insulation molded body such as a calcium silicate molded plate is attached to the upper part of the support column to form a fireproof coating, and heat is received in the gap between the fireproof coating and the upper casing. By disposing a thin film body of foaming type fireproof and heat insulating material, it is possible to provide a seismic isolation device that exhibits a seismic isolation function during an earthquake and is not affected by a flame during a fire.

特許第４０４７９１５号公報Japanese Patent No. 4047915

しかしながら、この技術では、発泡型耐火断熱性材料をすべり板の周囲に沿って配置する必要があり、挙動範囲の大きなすべり支承型の免震装置に適用した場合、施工に手間がかかるという問題があった。また、すべり板全体を覆う耐火被覆についても、下地となる鉄骨フレームを含め複雑に材料を組み合わせて構成する必要があり、施工に手間がかかるという問題があった。   However, with this technology, it is necessary to place the foam-type fireproof and heat-insulating material along the periphery of the sliding plate, and when applied to a sliding support type seismic isolation device with a large behavior range, there is a problem that it takes a lot of work. there were. In addition, the fireproof coating covering the entire sliding plate also needs to be configured by combining materials in a complicated manner including the steel frame as a base, and there is a problem that it takes time and effort for construction.

本発明は、このような従来技術の課題を解決し、必要最小限度の材料と手間で効率よく免震装置の耐火被覆を構成することができる免震装置の耐火被覆構造を提供することを目的とするものである。   An object of the present invention is to solve such problems of the prior art and to provide a fireproof coating structure for a seismic isolation device that can efficiently constitute a fireproof coating for the seismic isolation device with a minimum amount of materials and labor. It is what.

上記従来技術の課題を解決する為の本発明に係る免震装置の耐火被覆構造の第１の構成は、下部構造体に取り付けられたすべり板と、上部構造体に形成されたすべり支承下面に前記すべり板の上面を摺動するように取り付けられた樹脂製あるいは金属製のすべり材と、を有するすべり支承型の免震装置において、前記すべり支承下面における前記すべり材の周囲に、火災時に膨張して前記すべり材を被覆する熱膨張耐火材が、前記すべり板と非接触状態を保って取り付けられたことを特徴とする。 The first configuration of the fire protection structure of seismic isolation device according to the present invention for solving the above problems of the prior art, a sliding plate mounted on the lower structure, the sliding bearing lower surface formed in the upper structure in sliding bearings type seismic isolation device having a resin or metal skids mounted to slide an upper surface of the sliding plate, around the skids in the sliding bearings lower surface, expands on fire thermal expansion refractory material that covers the sliding member and, characterized in that mounted maintained the sliding plate and the non-contact state.

本発明に係る免震装置の耐火被覆構造の第２の構成は、前記第１の構成において、前記すべり板は樹脂製あるいは金属製であり、その上面のうち前記熱膨張耐火材で囲まれた領域外の曝露領域が、シート状もしくはマット状の耐火材が載置されて覆われたことを特徴とする。本発明に係る免震装置の耐火被覆構造の第３の構成は、前記第１または第２の構成において、前記上部構造体は鉄骨造であり、前記熱膨張耐火材が、前記上部構造体を被覆する耐火被覆材と連続的に接着されたことを特徴とする。 According to a second configuration of the fireproof covering structure of the seismic isolation device according to the present invention, in the first configuration, the sliding plate is made of resin or metal, and is surrounded by the thermal expansion refractory material on the upper surface thereof. exposure area outside area, sheet or mat of refractory material, characterized in that we covered is placed. According to a third configuration of the fireproof covering structure of the seismic isolation device according to the present invention, in the first or second configuration, the upper structure is a steel structure, and the thermal expansion refractory material includes the upper structure. It is characterized by being continuously adhered to the fireproof coating material to be coated.

本発明に係る免震装置の耐火被覆構造の第１の構成によれば、建物の上部構造体の荷重を免震装置より下方の下部構造体に伝達するための樹脂製あるいは金属製のすべり材の周囲にすべり板と非接触状態を保って熱膨張耐火材を取り付けたので、地震時の摺動に影響を与えることなく火災時にはすべり材を効率よく被覆することができる。   According to the first configuration of the fireproof covering structure of the seismic isolation device according to the present invention, a resin or metal sliding material for transmitting the load of the upper structure of the building to the lower structure below the seismic isolation device Since the thermal expansion refractory material is attached to the periphery of the sliding plate in a non-contact state, the sliding material can be efficiently coated in the event of a fire without affecting the sliding during an earthquake.

本発明に係る免震装置の耐火被覆構造の第２の構成によれば、樹脂製あるいは金属製のすべり板の上面のうち熱膨張耐火材で囲まれた領域は火災時に熱膨張耐火材で被覆され、また、熱膨張耐火材で囲まれた領域以外の曝露領域はシート状もしくはマット状の耐火材を載置することで被覆される。このように、簡単な作業ですべり板上面の全面的な耐火被覆を行うことができ施工の手間を削減することができる。しかも、すべり板の上面に塵埃が堆積することも防止することができ免震装置の初期の性能を維持することができる。   According to the second configuration of the fireproof covering structure of the seismic isolation device according to the present invention, the region surrounded by the thermally expanded refractory material on the upper surface of the resin or metal sliding plate is covered with the thermally expanded refractory material in the event of a fire. In addition, the exposed area other than the area surrounded by the thermally expanded refractory material is covered by placing a sheet-like or mat-like refractory material. In this way, it is possible to perform the entire fireproof coating on the upper surface of the sliding plate with a simple work, and to reduce the labor of construction. In addition, dust can be prevented from accumulating on the upper surface of the sliding plate, and the initial performance of the seismic isolation device can be maintained.

本発明に係る免震構造の最も好ましい実施形態について図を用いて説明する。図１は本発明に係る免震構造を適用した免震建物の斜視図、図２は免震建物のうち主に下部構造体の断面図、図３は免震装置まわりの構成を示す図、図４は免震プレートまわりの構成を示す図、図５は免震装置を構成するすべり支承とすべり板に施された耐火被覆構造の構成を示す図である。   A most preferred embodiment of the seismic isolation structure according to the present invention will be described with reference to the drawings. 1 is a perspective view of a seismic isolation building to which the seismic isolation structure according to the present invention is applied, FIG. 2 is a sectional view mainly of a lower structure in the seismic isolation building, and FIG. 3 is a diagram showing a configuration around the seismic isolation device, FIG. 4 is a diagram showing a configuration around the seismic isolation plate, and FIG. 5 is a diagram showing a configuration of a sliding support and a fireproof coating structure applied to the sliding plate constituting the seismic isolation device.

先ず、図１を参照して免震建物Ａの全体構成を説明する。免震建物Ａは３層の住宅であり、１階は玄関、ホール及び階段室以外は外部空間であるピロティであり、２、３階に居室が構成されている。また構造種別としては、下部構造体Ｂを構成する基礎１及び円柱（１階柱）２が鉄筋コンクリート造、上部構造体Ｃを構成する２階及び３階の柱３、大梁４ａ〜４ｃからなる架構が鉄骨造であり、妻方向１スパン、桁行き方向２スパンで構成されている。   First, the whole structure of the seismic isolation building A is demonstrated with reference to FIG. The base-isolated building A is a three-layer house, the first floor is a piloti that is an external space except for the entrance, hall and staircase, and the second and third floors have living rooms. As the structure type, the foundation 1 and the column (first floor column) 2 constituting the lower structure B are reinforced concrete, the second and third columns 3 constituting the upper structure C, and the beams 4a to 4c. Is a steel structure, consisting of one span in the wife direction and two spans in the girder direction.

次に、図１及び図２を参照して下部構造体Ｂの構成について説明する。下部構造体Ｂは、ベタ基礎形式の基礎１を有し、基礎１から円柱２が立ち上がっている。円柱２の柱脚部２ｂは基礎梁１aと耐圧盤１ｂにより剛に固定されているが、柱頭部２ａは梁で連結されておらず、円柱２は片持ち状態で突出している。円柱２の直径は上部構造体Ｃから作用する荷重に基づき７００ｍｍに設定されている。なお、１ｃはピロティの床を構成する土間コンクリートである。   Next, the configuration of the lower structure B will be described with reference to FIGS. 1 and 2. The lower structure B has a solid foundation type foundation 1, and a column 2 rises from the foundation 1. The column base 2b of the column 2 is rigidly fixed by the foundation beam 1a and the pressure platen 1b, but the column head 2a is not connected by the beam, and the column 2 protrudes in a cantilever state. The diameter of the cylinder 2 is set to 700 mm based on the load acting from the upper structure C. In addition, 1c is the soil concrete which comprises the floor of a piloti.

次に、図１〜図３を参照して上部構造体Ｃの構成について説明する。上部構造体Ｃにおいて、柱３は１５０ｍｍ角のシームレス（水平断面内に継目を持たない）角形鋼管で構成されており、平面的に円柱２と同じ位置に配置されている。柱３の側面の所定の位置にはボルト孔が穿設され後述する大梁４ａ〜４ｃが接合される梁接合部３ａが形成されており、柱３の下端部には後述するすべり支承１２が柱３と一体で形成されている。   Next, the configuration of the upper structure C will be described with reference to FIGS. In the upper structure C, the pillar 3 is formed of a 150 mm square seamless (not having a seam in a horizontal cross section) rectangular steel pipe, and is arranged in the same position as the cylinder 2 in a plan view. A bolt hole is drilled at a predetermined position on the side surface of the column 3 to form a beam joint 3a to which large beams 4a to 4c, which will be described later, are bonded. A slide support 12 (described later) is formed at the lower end of the column 3. 3 is formed integrally.

隣接する柱３どうしを連結する大梁４ａ〜４ｃはＨ形鋼からなる。Ｈ形鋼の両端には柱３の梁接合部３ａに形成されたボルト孔に対応する位置にボルト孔が穿設された接合プレート４ａ１〜４ｃ１が溶接されている。そして、梁接合部３ａにメタルタッチされ高力ボルトで剛接合されている。   The large beams 4a to 4c connecting the adjacent columns 3 are made of H-section steel. Joined plates 4a1 to 4c1 having bolt holes drilled at positions corresponding to the bolt holes formed in the beam joint portion 3a of the column 3 are welded to both ends of the H-shaped steel. The beam joint 3a is metal touched and rigidly joined with a high strength bolt.

柱３の梁接合部３ａのうち大梁４ａ〜４ｃが接合されていない建物の外側方向の梁接合部３ａには、大梁４ａ〜４ｃと同一断面のＨ形鋼からなる片持ち梁５ａ〜５ｃが配置され、これらの片持ち梁５ａ〜５ｃの一端に大梁４ａ〜４ｃの接合プレート４ａ１〜４ｃ１と同様に構成された接合プレート５ａ１〜５ｃ１が溶接されている。そして、梁接合部３ａにメタルタッチされ高力ボルトで剛接合されている。片持ち梁５ａ〜５ｃの先端側には大梁４ａ〜４ｃと同一断面のＨ形鋼からなる鼻先梁６ａ〜６ｃが取り付けられている。   The cantilever beams 5a to 5c made of H-shaped steel having the same cross section as the large beams 4a to 4c are formed on the beam joint portion 3a in the outer direction of the building where the large beams 4a to 4c are not joined among the beam joint portions 3a of the column 3. The joining plates 5a1 to 5c1 that are arranged and configured similarly to the joining plates 4a1 to 4c1 of the large beams 4a to 4c are welded to one end of these cantilever beams 5a to 5c. The beam joint 3a is metal touched and rigidly joined with a high strength bolt. Nose tip beams 6a to 6c made of H-shaped steel having the same cross section as the large beams 4a to 4c are attached to the distal ends of the cantilevers 5a to 5c.

鼻先梁６ａ〜６ｃのフランジには外壁パネルの支持と位置決めの為の金物（不図示）が取り付けられ、該金物によってＡＬＣパネルからなる外壁パネル７が固定され外壁８が構成されている。また、対向する大梁４ａ〜４ｃの間にはＨ形鋼からなる小梁（不図示）が適宜架け渡された上で、ＡＬＣ（軽量気泡コンクリート）パネルからなる床パネル９が前記各種梁の上フランジに載置されて床１０が構成されている。   A hardware (not shown) for supporting and positioning the outer wall panel is attached to the flanges of the nose tip beams 6a to 6c, and the outer wall panel 7 made of an ALC panel is fixed by the hardware to constitute the outer wall 8. In addition, a small beam (not shown) made of H-shaped steel is appropriately bridged between the opposed large beams 4a to 4c, and a floor panel 9 made of an ALC (lightweight cellular concrete) panel is placed on the various beams. A floor 10 is configured by being placed on a flange.

上記片持ち梁５ａ〜５ｃや鼻先梁６ａ〜６ｃによって上部構造体Ｃの床１０は柱３よりもせり出した状態となり、後述する免震プレートＥや免震装置Ｄは床面の領域内に配置される。   The floor 10 of the upper structure C protrudes from the column 3 by the cantilever beams 5a to 5c and the nose tip beams 6a to 6c, and the seismic isolation plate E and the seismic isolation device D, which will be described later, are arranged in the area of the floor surface. Is done.

また、免震建物Ａを耐火建築物とする為に、上部構造体を構成する柱３や前記各種梁４、５、６等の鉄骨部材の、ＡＬＣパネルからなる床パネル９や外壁パネル７で覆われない部位には所定の耐火性を有するロックウール、繊維混入珪酸カルシウム耐火被覆板、石膏ボート、マット状耐火被覆材等にて耐火被覆が施される（不図示）。   In addition, in order to make the base-isolated building A a fire-resistant building, the floor panel 9 and the outer wall panel 7 made of ALC panels of steel members such as the columns 3 constituting the upper structure and the various beams 4, 5, 6 are used. The uncovered portion is fire-resistant coated with rock wool having a predetermined fire resistance, a fiber-mixed calcium silicate fire-resistant coating board, a gypsum boat, a mat-shaped fire resistant coating material, and the like (not shown).

次に、図２、図３を参照して免震装置Ｄの構成について説明する。本実施例で使用される免震装置Ｄはすべり支承型であり、支持機能を有するすべり支承１２とすべり板１３、復元機能を有する復元ゴム１４、減衰機能を有するオイルダンパー１５で構成されている。   Next, the structure of the seismic isolation apparatus D is demonstrated with reference to FIG. 2, FIG. The seismic isolation device D used in the present embodiment is of a sliding bearing type, and includes a sliding bearing 12 having a supporting function, a sliding plate 13, a restoring rubber 14 having a restoring function, and an oil damper 15 having a damping function. .

次に、図４を参照して免震プレートＥの構成について説明する。免震プレートＥは免震装置Ｄを載置あるいは固定する為の部材である。材質は表面に防錆塗装が施された鋼製である。なお、防錆塗装にかえて溶融亜鉛めっき等の防錆処理を施したものでもよい。形状は、外径１３７０ｍｍ、厚さ２９ｍｍの円盤状であり、上面にはすべり支承１２の移動範囲を規制する環状の突起部１１が溶接されて突起部１１の内部の面がすべり板載置部１６となっている。すべり板載置部１６の直径は、上部構造体Ｃに求められる免震効果から算定された相対的な最大変位に基づき８９０ｍｍに設定されており、また、上部構造体Ｃが最大限変位した際にも上部構造体Ｃからの鉛直荷重が免震プレートＥに対し圧縮力のみが作用し曲げが作用しないように設定されている。   Next, the configuration of the seismic isolation plate E will be described with reference to FIG. The seismic isolation plate E is a member for mounting or fixing the seismic isolation device D. The material is made of steel with a rust-proof coating on the surface. In addition, the thing which gave antirust processing, such as hot dip galvanizing, instead of antirust coating may be used. The shape is a disk shape having an outer diameter of 1370 mm and a thickness of 29 mm, and an annular protrusion 11 that regulates the moving range of the slide support 12 is welded to the upper surface, and the inner surface of the protrusion 11 is the slip plate mounting portion. It is 16. The diameter of the sliding plate mounting portion 16 is set to 890 mm based on the relative maximum displacement calculated from the seismic isolation effect required for the upper structure C, and when the upper structure C is displaced to the maximum extent. In addition, the vertical load from the upper structure C is set so that only the compressive force acts on the seismic isolation plate E and the bending does not act.

突起部１１よりも外側の周縁部１７には復元ゴム１４、オイルダンパー１５をボルト固定する為のボルト孔１７ａが形成されている。このボルト孔１７ａは等間隔で４個所（９０度間隔）穿設されており、夫々対応する機能部材（復元ゴム１４あるいはオイルダンパー１５）のボルト孔に対応させて４個、６個の孔が穿設されている。   Bolt holes 17 a for bolting the restoring rubber 14 and the oil damper 15 are formed in the peripheral edge 17 outside the protrusion 11. The bolt holes 17a are formed at four equal intervals (90 degree intervals), and there are four or six holes corresponding to the bolt holes of the corresponding functional members (the restoring rubber 14 or the oil damper 15). It has been drilled.

免震プレートＥのすべり板載置部１６及び円柱２との接触面以外の部分は吹き付けされたロックウールからなる湿式耐火被覆材１８にて被覆されている。   Portions of the seismic isolation plate E other than the sliding plate mounting portion 16 and the contact surface with the cylinder 2 are covered with a wet fireproof covering material 18 made of sprayed rock wool.

次に、図５を参照して免震装置Ｄを構成するすべり支承１２とすべり板１３、及びそれらに施された耐火被覆の詳細な構成について説明する。すべり支承１２は、円盤状のフランジ１２ａの下面中央の凹部にフランジ１２ａよりも小径の円盤状のすべり材保持片１２ｂを嵌め込んで固定し、更にすべり材保持片１２ｂ下面中央の凹部にすべり材保持片１２ｂよりも更に小径の円盤状のすべり材１２ｃを、その下端がすべり材保持片１２ｂの下面よりも突出するように嵌め込んで構成されている。そして、１階の大梁４ａの下フランジよりも下方に突出した柱３の下端部に溶接された円形の接合プレート３ｂの下面にボルト接合されている。すべり板１３は八角形の板状であり、免震プレートＥの突起部１１に頂点がほぼ内接するように、すべり板載置部１６に載置、固定されている。すべり支承１２及びすべり板１３は地震時に滑らかに変位するために表面にフッ素樹脂コーティングがなされている。   Next, with reference to FIG. 5, the detailed structure of the sliding bearing 12 and the sliding board 13 which comprise the seismic isolation apparatus D, and the fireproof coating applied to them is demonstrated. The sliding support 12 has a disc-shaped sliding material holding piece 12b having a diameter smaller than that of the flange 12a fitted in and fixed to a concave portion in the center of the lower surface of the disc-shaped flange 12a, and is further fixed to the concave portion in the lower surface center of the sliding material holding piece 12b. A disc-shaped sliding member 12c having a diameter smaller than that of the holding piece 12b is fitted so that its lower end protrudes from the lower surface of the sliding piece holding piece 12b. And it is bolt-joined to the lower surface of the circular joining plate 3b welded to the lower end part of the pillar 3 which protruded below rather than the lower flange of the first beam 4a. The slip plate 13 has an octagonal plate shape, and is mounted and fixed on the slide plate mounting portion 16 so that the apex is substantially inscribed in the protruding portion 11 of the seismic isolation plate E. The sliding bearing 12 and the sliding plate 13 are coated with a fluororesin on the surface in order to smoothly displace during an earthquake.

すべり支承１２のフランジ１２ａ下面におけるすべり材保持片１２ｂの周囲にはすべり支承１２を覆うようにドーナツ状の熱膨張耐火材１９が接着されている。熱膨張耐火材１９は平常時にすべり板１３と接触しないように厚みが設定されている。柱３の耐火被覆はすべり支承１２のフランジ１２ａ側面下端部に到達するように構成されている。   A doughnut-shaped thermal expansion refractory material 19 is bonded to the periphery of the sliding material holding piece 12 b on the lower surface of the flange 12 a of the sliding support 12 so as to cover the sliding support 12. The thickness of the thermally expanded refractory material 19 is set so that it does not come into contact with the sliding plate 13 in normal times. The fireproof coating of the pillar 3 is configured to reach the lower end of the side surface of the flange 12a of the sliding support 12.

本実施例のドーナツ状の熱膨張耐火材１９は、ブチルゴム、水添石油樹脂、ポリブデン、ポリ燐酸アンモニウム、水酸化アンモニウム、熱膨張性黒鉛、炭酸カルシウムを、ニーダーを用いて溶解混錬して得られた樹脂組成物を、カレンダー成形によって、アルミ箔とガラスクロスからなる積層シートを積層させながらシート状に成形したもの（商品名：フィブロック、積水化学工業株式会社製）である。そして、２００度以上に熱せられた際に体積が２０倍以上に膨張するように設定されている。   The doughnut-like thermally expandable refractory material 19 of this example is obtained by dissolving and kneading butyl rubber, hydrogenated petroleum resin, polybutene, ammonium polyphosphate, ammonium hydroxide, thermally expandable graphite, and calcium carbonate using a kneader. The obtained resin composition is formed into a sheet shape by laminating a laminated sheet made of aluminum foil and glass cloth by calendar molding (trade name: Fiblok, manufactured by Sekisui Chemical Co., Ltd.). And it is set so that when heated to 200 degrees or more, the volume expands 20 times or more.

熱膨張耐火材１９は、地震時に上部構造体Ｃが相対的に変位した際には上部構造体Ｃの変位に追従して変位し、変位が収束するとともに当初の位置に復帰する。そして、火災時には、熱膨張耐火材１９は熱によって膨張しすべり材１２ｃ及びすべり板１３の上面のうち上部構造体の荷重が伝達されるすべり支承１２下部の領域を火炎から効率よく保護することができる。   The thermal expansion refractory material 19 is displaced following the displacement of the upper structure C when the upper structure C is relatively displaced during the earthquake, and the displacement converges and returns to the initial position. In the event of a fire, the thermal expansion refractory material 19 expands due to heat and can efficiently protect the area below the sliding bearing 12 to which the load of the upper structure is transmitted among the sliding material 12c and the sliding plate 13 from the flame. it can.

なお、熱膨張耐火材１９は、上記のようにフランジ１２ａの下面以外に、柱３下端の接合プレート３ｂもしくはフランジ１２ａの側端面に巻きつけるように接着してもよい。   In addition, you may adhere | attach the thermal expansion refractory material 19 so that it may wind around the joining plate 3b of the pillar 3 lower end or the side end surface of the flange 12a other than the lower surface of the flange 12a as mentioned above.

すべり板１３の上面のうち、すべり支承１２下部の熱膨張耐火材１９で覆われた領域以外の曝露領域にはシート状の耐火材２０が載置されている。耐火材２０は、上記熱膨張耐火材１９と同一の材料で構成されており、平常時はすべり板１３上面に塵埃が堆積することを防止し、火災時には、すべり板１３上面を火炎から保護する。耐火材２０は、加工が容易ですべり板１３の上面に載置するだけであるので施工に手間を要しない。また、軽量かつ柔軟性を有するので地震時には容易に移動あるいは変形し上部構造体Ｃの変位（すべり支承の摺動）に影響を与えることがない。なお、地震時の上部構造体Ｃの変位によって位置ずれが生じる可能性があるが、すべり板１３上面に載置しているだけであるので容易に所定の位置に復帰させることができる。   A sheet-like refractory material 20 is placed in an exposed area of the upper surface of the sliding plate 13 other than the area covered with the thermal expansion refractory material 19 below the sliding support 12. The refractory material 20 is made of the same material as the thermal expansion refractory material 19, and prevents dust from accumulating on the upper surface of the sliding plate 13 during normal times, and protects the upper surface of the sliding plate 13 from flames in the event of a fire. . Since the refractory material 20 is easy to process and is merely placed on the upper surface of the sliding plate 13, it does not require labor. Further, since it is lightweight and flexible, it is easily moved or deformed during an earthquake and does not affect the displacement of the upper structure C (sliding of the sliding bearing). Although there is a possibility that a displacement occurs due to the displacement of the upper structure C at the time of an earthquake, it can be easily returned to a predetermined position because it is only placed on the upper surface of the sliding plate 13.

耐火材２０としてはこのような所定の温度で熱膨張するシート状の材料に限らず、マット状のロックウールからなる耐火被覆材（商品名：マキベエ、ニチアス株式会社製等）などを適用することができ、同様の作用効果を発揮することができる。   The refractory material 20 is not limited to such a sheet-like material that thermally expands at a predetermined temperature, and a refractory coating material (trade name: Makibee, manufactured by Nichias Co., Ltd.) made of mat-like rock wool or the like is applied. And the same effects can be achieved.

本発明は、中間階における免震装置に限らず、一般的な地盤面付近に設けられる免震装置にも適用することが可能である。   The present invention can be applied not only to seismic isolation devices on intermediate floors but also to seismic isolation devices provided near a general ground surface.

本発明に係る免震構造を適用した免震建物の斜視図である。It is a perspective view of a base isolation building to which the base isolation structure according to the present invention is applied. 免震建物の主に下部構造体の断面図である。It is sectional drawing of a lower structure mainly of a seismic isolation building. 免震装置まわりの構成を示す図である。It is a figure which shows the structure around a seismic isolation apparatus. 免震プレートまわりの構成を示す図である。It is a figure which shows the structure around a seismic isolation plate. 免震装置を構成するすべり支承とすべり板に施された耐火被覆構造の構成を示す図である。It is a figure which shows the structure of the fireproof coating | cover structure given to the sliding bearing and sliding board which comprise a seismic isolation apparatus.

Ａ…免震建物
Ｂ…下部構造体
Ｃ…上部構造体
Ｄ…免震装置
Ｅ…免震プレート
１…基礎
１ａ…基礎梁
１ｂ…耐圧盤
１ｃ…土間コンクリート
２…円柱（１階柱）
２ａ…柱頭部
３…柱
３ａ…梁接合部
３ｂ…接合プレート
４ａ〜４ｃ…大梁
４ａ１〜４ｃ１…接合プレート
５ａ〜５ｃ…片持ち梁
５ａ１〜５ｃ１…接合プレート
６ａ〜６ｃ…鼻先梁
７…外壁パネル
８…外壁
９…床パネル
１０…床
１１…突起部
１２…すべり支承
１２ａ…フランジ
１２ｂ…すべり材保持片
１２ｃ…すべり材
１３…すべり板
１４…復元ゴム
１５…オイルダンパー
１６…受け板載置部
１７…周縁部
１７ａ…ボルト孔
１８…湿式耐火被覆材
１９…熱膨張耐火材
２０…耐火材 A ... Seismic isolation building B ... Lower structure C ... Upper structure D ... Seismic isolation device E ... Seismic isolation plate 1 ... Foundation 1a ... Base beam 1b ... Pressure panel 1c ... Soil concrete 2 ... Cylinder (1st floor pillar)
2a ... Column head 3 ... Column 3a ... Beam joint 3b ... Joint plate 4a-4c ... Large beam 4a1-4c1 ... Joint plate 5a-5c ... Cantilever 5a1-5c1 ... Joint plate 6a-6c ... Nose tip beam 7 ... Outer wall panel DESCRIPTION OF SYMBOLS 8 ... Outer wall 9 ... Floor panel 10 ... Floor 11 ... Protruding part 12 ... Sliding support 12a ... Flange 12b ... Sliding material holding piece 12c ... Sliding material 13 ... Sliding plate 14 ... Restoring rubber 15 ... Oil damper 16 ... Receiving plate mounting part DESCRIPTION OF SYMBOLS 17 ... Peripheral part 17a ... Bolt hole 18 ... Wet fireproof coating material 19 ... Thermal expansion fireproof material 20 ... Fireproof material

Claims (3)

下部構造体に取り付けられたすべり板と、上部構造体に形成されたすべり支承下面に前記すべり板の上面を摺動するように取り付けられた樹脂製あるいは金属製のすべり材と、を有するすべり支承型の免震装置において、
前記すべり支承下面における前記すべり材の周囲に、火災時に膨張して前記すべり材を被覆する熱膨張耐火材が、前記すべり板と非接触状態を保って取り付けられたことを特徴とする免震装置の耐火被覆構造。 Sliding bearing having a sliding plate which is attached to the lower structure, and a resin or a metal skids mounted to slide an upper surface of the sliding bearing lower surface formed in the upper structure said sliding plate In the type of seismic isolation device,
A seismic isolation device, characterized in that a thermal expansion refractory material that expands in the event of a fire and covers the sliding material is attached in a non-contact state with the sliding plate around the sliding material on the lower surface of the sliding bearing. Fireproof coating structure. 前記すべり板は樹脂製あるいは金属製であり、その上面のうち前記熱膨張耐火材で覆われた領域以外の曝露領域が、シート状もしくはマット状の耐火材が載置されて覆われたことを特徴とする請求項１に記載した免震装置の耐火被覆構造。 The sliding plate is made of plastic or metal, that the exposure area other than the area covered by the thermal expansion refractory material of the upper surface, sheet or mat of refractory material is crack covered is placed The fireproof covering structure for a seismic isolation device according to claim 1, wherein 前記上部構造体は鉄骨造であり、前記熱膨張耐火材が、前記上部構造体を被覆する耐火被覆材と連続的に接着されたことを特徴とする請求項１又は２に記載した免震装置の耐火被覆構造。3. The seismic isolation device according to claim 1, wherein the upper structure is a steel structure, and the thermal expansion refractory material is continuously bonded to a refractory coating material that covers the upper structure. Fireproof coating structure.
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