JP5990425B2 - Bonding structure of structural members - Google Patents

Bonding structure of structural members Download PDF

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JP5990425B2
JP5990425B2 JP2012170540A JP2012170540A JP5990425B2 JP 5990425 B2 JP5990425 B2 JP 5990425B2 JP 2012170540 A JP2012170540 A JP 2012170540A JP 2012170540 A JP2012170540 A JP 2012170540A JP 5990425 B2 JP5990425 B2 JP 5990425B2
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structural member
core material
layer
column
joining
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JP2014029093A (en
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宏和 大橋
宏和 大橋
智仁 岡崎
智仁 岡崎
長岡　勉
勉 長岡
洋樹 永盛
洋樹 永盛
信哉 五十嵐
信哉 五十嵐
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Takenaka Corp
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Description

本発明は、鋼製の構造部材と、木製の構造部材とを接合した構造部材の接合構造に関する。   The present invention relates to a joining structure of a structural member obtained by joining a steel structural member and a wooden structural member.

木製柱に鋼製梁を接合して建物を構築する技術が提案されている。例えば、特許文献１では、接続用金具を用いて鋼製梁を木製柱に接合している。   A technique for constructing a building by joining steel beams to wooden columns has been proposed. For example, in patent document 1, the steel beam is joined to the wooden pillar using the connection metal fitting.

しかし、火災時に鋼製梁が加熱され、この熱が木製柱に伝達されて木製柱の燃焼開始温度以上になってしまうと、木製柱が燃焼して構造部材としての健全性を維持できなくなってしまう。一般に、木製柱の燃焼開始温度は鋼製梁の耐火温度（鋼製梁が殆ど耐力低下せずに構造部材としての健全性を維持できる温度）よりも低いので、一般的な耐火被覆が鋼製梁に施されていても、鋼製梁から伝達された熱によって木製柱が燃焼してしまうことが懸念される。   However, if the steel beam is heated in the event of a fire and this heat is transferred to the wooden column and exceeds the combustion start temperature of the wooden column, the wooden column will burn and it will not be possible to maintain the soundness of the structural member. End up. In general, the combustion start temperature of a wooden column is lower than the fireproof temperature of a steel beam (the temperature at which a steel beam can maintain its soundness as a structural member with almost no decrease in yield strength). Even if it is applied to the beam, there is a concern that the wooden pillar will burn due to the heat transferred from the steel beam.

特開２００９−１７４２７１号公報JP 2009-174271 A

本発明は係る事実を考慮し、鋼製の構造部材から木製の構造部材へ伝えられる熱を抑制することができる構造部材の接合構造を提供することを課題とする。   This invention considers the fact which concerns, and makes it a subject to provide the joining structure of the structural member which can suppress the heat transmitted from the steel structural member to the wooden structural member.

第１態様の発明は、鋼製の第１構造部材と、荷重を支持する木製の心材と前記心材の周囲を取り囲む燃え止まり層とを備えた第２構造部材と、前記第１構造部材と前記第２構造部材とを接合し、前記第１構造部材から前記心材へ及び前記心材から前記第１構造部材へ力を伝える接合部材と、前記第１構造部材を覆い、該第１構造部材から前記心材へ伝達される熱を前記心材が燃焼しない温度にする被覆層と、を有する構造部材の接合構造である。 The invention according to the first aspect includes a first structural member made of steel, a second structural member comprising a wooden core material supporting a load, and a flame stop layer surrounding the periphery of the core material, the first structural member, Joining a second structural member, covering the first structural member with a joining member for transmitting force from the first structural member to the core material and from the core material to the first structural member; And a covering layer that brings the heat transferred to the core material to a temperature at which the core material does not burn.

第１態様の発明では、被覆層によって、火災により加熱された第１構造部材から第２構造部材の心材へ伝達される熱を心材が燃焼しない温度（燃焼開始温度未満の温度）にすることにより、第２構造部材の心材が燃焼するのを防ぐことができる。これにより、火災時において第２構造部材の耐火性が確保され、構造部材としての第２構造部材の健全性を維持することができる。 In the first aspect of the invention, by the cover layer, the heat transmitted from the first structural member heated by the fire to the core material of the second structural member is set to a temperature at which the core material does not burn (temperature less than the combustion start temperature). The core material of the second structural member can be prevented from burning. Thereby, the fire resistance of a 2nd structural member is ensured at the time of a fire, and the soundness of the 2nd structural member as a structural member can be maintained.

また、接合部材により第１構造部材から心材へ、及び心材から第１構造部材へ力が伝えられることによって、第１構造部材と第２構造部材との接合強度を確実に確保することができる。   In addition, since the force is transmitted from the first structural member to the core material and from the core material to the first structural member by the bonding member, the bonding strength between the first structural member and the second structural member can be reliably ensured.

さらに、第２構造部材の耐火性は、第１構造部材に設ける耐火被覆（被覆層）により得られるので、第１構造部材と第２構造部材とを一般的な接合方法で接合することができる。   Furthermore, since the fire resistance of the second structural member is obtained by a fireproof coating (coating layer) provided on the first structural member, the first structural member and the second structural member can be joined by a general joining method. .

第２態様の発明は、第１態様の構造部材の接合構造において、前記被覆層は、前記第１構造部材の周囲を取り囲む板状の耐火部材であり、該耐火部材の端部と前記燃え止まり層とが、直接又は耐火シールを介して繋がっている。 According to a second aspect of the present invention, in the joining structure of structural members according to the first aspect , the covering layer is a plate-like fireproof member surrounding the first structural member, and an end portion of the fireproof member and the flame stop The layers are connected directly or through a refractory seal.

第２態様の発明では、被覆層を板状の耐火部材とすることにより、吹き付けにより被覆層を形成するよりも簡単に被覆層を形成することができる。 In the second aspect of the invention, the cover layer can be formed more simply than by forming the cover layer by spraying by using the cover layer as a plate-like fireproof member.

また、耐火部材の端部と燃え止まり層とが、直接又は耐火シールを介して繋がっているので、耐火部材の端部と燃え止まり層との間から第２構造部材の心材へ熱が伝わるのを抑制することができる。   In addition, since the end of the refractory member and the flame stop layer are connected directly or via a fireproof seal, heat is transferred from the end of the refractory member and the flame stop layer to the core of the second structural member. Can be suppressed.

第３態様の発明は、第１態様又は第２態様の構造部材の接合構造において、前記第１構造部材の接合端部を覆う前記被覆層の厚さよりも、前記接合端部以外の前記第１構造部材の部位を覆う前記被覆層の厚さを薄くする。 According to a third aspect of the present invention, in the joining structure for structural members according to the first aspect or the second aspect , the first portion other than the joining end portion is thicker than the thickness of the covering layer covering the joining end portion of the first structural member. The thickness of the coating layer covering the part of the structural member is reduced.

第３態様の発明では、第２構造部材の耐火性能を大きく低下させることなく、第１構造部材全体に対する耐火被覆の被覆量を抑えることができる。これにより、耐火被覆を含めた第１構造部材の軽量化を図ることができる。 In the invention of the third aspect , it is possible to suppress the coating amount of the fireproof coating on the entire first structural member without greatly reducing the fireproof performance of the second structural member. Thereby, the weight reduction of the 1st structural member including a fireproof coating can be achieved.

本発明は上記構成としたので、鋼製の構造部材から木製の構造部材へ伝えられる熱を抑制することができる。   Since this invention was set as the said structure, the heat transmitted from the steel structural member to a wooden structural member can be suppressed.

本発明の実施形態に係る構造部材の接合構造を示す斜視図である。It is a perspective view which shows the joining structure of the structural member which concerns on embodiment of this invention. 本発明の実施形態に係る構造部材の接合構造を示す側断面図である。It is a sectional side view which shows the joining structure of the structural member which concerns on embodiment of this invention. 図２のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 本発明の実施形態に係る構造部材の接合構造の変形例を示す平断面図である。It is a plane sectional view showing the modification of the joining structure of the structural member concerning the embodiment of the present invention. 本発明の実施形態に係る構造部材の接合構造の変形例を示す斜視図である。It is a perspective view which shows the modification of the joining structure of the structural member which concerns on embodiment of this invention. 本発明の実施形態に係る構造部材の接合構造の変形例を示す斜視図である。It is a perspective view which shows the modification of the joining structure of the structural member which concerns on embodiment of this invention. 本発明の実施形態に係る構造部材の接合構造の変形例を示す横断面図である。It is a cross-sectional view which shows the modification of the joining structure of the structural member which concerns on embodiment of this invention.

図を参照しながら、本発明の実施形態を説明する。まず、本発明の実施形態に係る構造部材の接合構造について説明する。   Embodiments of the present invention will be described with reference to the drawings. First, a structure for joining structural members according to an embodiment of the present invention will be described.

図１の斜視図、及び図２の側断面図に示すように、本実施形態の構造部材の接合構造１０（以下、「接合構造１０」とする）は、第１構造部材としての梁１２、第２構造部材としての柱１４、接合部材としてのガセットプレート２４、及び耐火被覆としての被覆層１６を有している。   As shown in the perspective view of FIG. 1 and the side sectional view of FIG. 2, the structural member joining structure 10 (hereinafter referred to as “joining structure 10”) of the present embodiment includes a beam 12 as a first structural member, It has the pillar 14 as a 2nd structural member, the gusset plate 24 as a joining member, and the coating layer 16 as a fireproof coating.

梁１２は、Ｈ形鋼によって構成されている。柱１４は、荷重を支持する木製の心材としての柱心材１８と、柱心材１８の周囲を取り囲む燃え止まり層２０と、燃え止まり層２０の周囲を取り囲む木製の燃え代層２２とを備えている。ガセットプレート２４は、鋼板からなり、端部に板状のベースプレート２６が設けられている。   The beam 12 is made of H-shaped steel. The column 14 includes a column core 18 as a wooden core that supports a load, a flame stop layer 20 that surrounds the periphery of the column core 18, and a wooden burn allowance layer 22 that surrounds the periphery of the flame stop layer 20. . The gusset plate 24 is made of a steel plate, and a plate-like base plate 26 is provided at the end.

ガセットプレート２４の端部（ベースプレート２６）は、柱１４の梁１２側の側面（燃え止まり層２０及び燃え代層２２）に形成された切り欠き部４２に挿入されており、これによって、柱心材１８の側面にベースプレート２６の背面３６を接触させた状態で、柱１４に梁１２が接合されている。   The end portion (base plate 26) of the gusset plate 24 is inserted into a notch portion 42 formed on the side surface (burning stop layer 20 and burning allowance layer 22) of the column 14 on the beam 12 side. The beam 12 is joined to the column 14 with the back surface 36 of the base plate 26 in contact with the side surface 18.

ガセットプレート２４は、柱心材１８に略水平に形成された貫通孔３８へアンカーボルト２８を貫通させ、このアンカーボルト２８の両端部にナット３０、３２を捩じ込み締め付けることによって、柱心材１８の側面に背面３６を接触させて柱心材１８に固定されている。これにより、ガセットプレート２４は、柱１４の外側へ張り出すようにして設けられている。なお、例えば、図２に示すように、柱心材１８（後に説明する切り欠き部３４の底面）とナット３０との間にプレート１５０を介在させてもよい。このようにすれば、ナット３０を締め付けたときに、このナット３０が柱心材１８にめり込むのを防ぐことができる。   The gusset plate 24 allows the anchor bolts 28 to pass through through holes 38 formed substantially horizontally in the column core material 18, and nuts 30 and 32 are screwed and tightened to both ends of the anchor bolt 28, whereby the column core material 18. The back surface 36 is brought into contact with the side surface and fixed to the column core material 18. Thereby, the gusset plate 24 is provided so as to protrude to the outside of the column 14. For example, as shown in FIG. 2, a plate 150 may be interposed between the column core material 18 (the bottom surface of a notch portion 34 described later) and the nut 30. In this way, when the nut 30 is tightened, the nut 30 can be prevented from sinking into the column core material 18.

図２に示すように、柱心材１８の梁１２と逆側の側面には、ナット３０、アンカーボルト２８の左端部、及びプレート１５０が収容される切り欠き部３４が形成され、この切り欠き部３４を覆うように燃え止まり層２０及び燃え代層２２が設けられている。切り欠き部３４には、ロックウール、モルタル等の断熱材Ｍが充填されて耐火処理が施されており、切り欠き部３４から柱心材１８へ熱が進入することを防いでいる。なお、切り欠き部３４を形成しないで、例えば、ナット３０、アンカーボルト２８の左端部、及びプレート１５０を収容する切り欠き部を、柱１４の梁１２と逆側の側面（燃え止まり層２０及び燃え代層２２）に形成し、この切り欠き部に断熱材Ｍを充填するようにしてもよい。   As shown in FIG. 2, a notch 34 in which the nut 30, the left end of the anchor bolt 28, and the plate 150 are accommodated is formed on the side surface opposite to the beam 12 of the column core 18. A flame stop layer 20 and a burn allowance layer 22 are provided so as to cover 34. The notch 34 is filled with a heat insulating material M such as rock wool or mortar and is subjected to a fireproofing treatment to prevent heat from entering the column core material 18 from the notch 34. In addition, without forming the notch portion 34, for example, the nut 30, the left end portion of the anchor bolt 28, and the notch portion that accommodates the plate 150 are disposed on the side surface opposite to the beam 12 of the column 14 (the flame stop layer 20 and It may be formed in the burning allowance layer 22) and the notch may be filled with the heat insulating material M.

梁１２は、高力ボルト４４及びナット４６によってガセットプレート２４にボルト接合されることにより、ガセットプレート２４にピン接合されている。これによって、ガセットプレート２４は、梁１２を柱１４にピン接合し、梁１２から柱心材１８へ、及び柱心材１８から梁１２へ力を伝える。   The beam 12 is pin-connected to the gusset plate 24 by being bolted to the gusset plate 24 by high strength bolts 44 and nuts 46. Thus, the gusset plate 24 pins the beam 12 to the column 14 and transmits a force from the beam 12 to the column core 18 and from the column core 18 to the beam 12.

また、被覆層１６は、梁１２に箱貼りで取り付けられて梁１２の側面と下面とを覆う、けい酸カルシウム板により構成された板状の耐火部材４０Ａ〜Ｃによって形成されており、梁１２の周囲を取り囲むことによって梁１２から柱心材１８へ伝達される熱を柱心材１８が燃焼しない温度にする。柱心材１８が燃焼しない温度とは、柱１４を構成する柱心材１８が火災時に燃焼することなく、殆ど耐力低下せずに構造部材としての健全性を維持できる柱１４の耐火温度、すなわち、柱心材１８の燃焼開始温度未満の温度（例えば、２６０°Ｃ）を意味する。   The covering layer 16 is formed by plate-like fire-resistant members 40A to 40C made of calcium silicate plates that are attached to the beam 12 by box attachment and cover the side and lower surfaces of the beam 12. The heat transferred from the beam 12 to the column core member 18 is set to a temperature at which the column core member 18 does not burn. The temperature at which the column core material 18 does not burn is the flame resistance temperature of the column 14 that can maintain the soundness as a structural member without burning down the column core material 18 that constitutes the column 14 at the time of fire, that is, the column. It means a temperature (for example, 260 ° C.) lower than the combustion start temperature of the core material 18.

図２のＡ−Ａ断面図である図３に示すように、被覆層１６の側壁を構成する耐火部材４０Ａ、４０Ｂの端部（端面）と、燃え止まり層２０の側面とが、直接又は耐火シールを介して繋がっている。図３では、燃え止まり層２０の側面に耐火部材４０Ａ、４０Ｂの端部（端面）を接触させて、耐火部材４０Ａ、４０Ｂの端部（端面）と燃え止まり層２０の側面とが直接繋がっている例が示されている。また、図２に示すように、被覆層１６の底壁を構成する耐火部材４０Ｃの端部（端面）と、柱心材１８の側面とが、直接又は耐火シールを介して繋がっている。図２では、柱心材１８の側面に耐火部材４０Ｃの端部（端面）を接触させて、耐火部材４０Ｃの端部（端面）と柱心材１８の側面とが直接繋がっている例が示されている。なお、耐火部材４０Ａ、４０Ｂの端部（端面）を柱心材１８の側面に、直接又は耐火シールを介して繋げてもよいし、耐火部材４０Ｃの端部（端面）を燃え止まり層２０の側面に、直接又は耐火シールを介して繋げてもよい。   As shown in FIG. 3 which is an AA cross-sectional view of FIG. 2, the end portions (end surfaces) of the refractory members 40A and 40B constituting the side wall of the covering layer 16 and the side surface of the flame stop layer 20 are directly or fireproof. It is connected through a seal. In FIG. 3, the end portions (end surfaces) of the refractory members 40 </ b> A and 40 </ b> B are brought into contact with the side surfaces of the flame stop layer 20, and the end portions (end surfaces) of the refractory members 40 </ b> A and 40 </ b> B and the side surfaces of the flame stop layer 20 are directly connected. An example is shown. Moreover, as shown in FIG. 2, the edge part (end surface) of the refractory member 40C which comprises the bottom wall of the coating layer 16, and the side surface of the column core material 18 are connected directly or through the refractory seal. FIG. 2 shows an example in which the end portion (end surface) of the refractory member 40C is brought into contact with the side surface of the column core member 18 and the end portion (end surface) of the refractory member 40C and the side surface of the column core member 18 are directly connected. Yes. The end portions (end surfaces) of the refractory members 40A and 40B may be connected to the side surfaces of the column core 18 directly or through a refractory seal, or the end portions (end surfaces) of the refractory members 40C may be connected to the side surfaces of the flame stop layer 20. Further, they may be connected directly or through a fireproof seal.

図２に示すように、梁１２の上面には、鉄筋コンクリート製の床版４８が設けられている。また、切り欠き部４２は、柱心材１８の側面にガセットプレート２４が固定された状態で、ベースプレート２６の上面と、燃え止まり層２０及び燃え代層２２の下面との間、及びベースプレート２６の下面と、燃え止まり層２０及び燃え代層２２の上面との間に１０〜２０ｍｍ程度の隙間を有するように形成されている（以下、ベースプレート２６の上面に形成されている隙間を「上目地」、ベースプレート２６の下面に形成されている隙間を「下目地」とする）。このようにすれば、切り欠き部４２の開口面積を大きくすることができるので、ガセットプレート２４（ベースプレート２６）、梁１２、及び耐火部材４０Ａ〜Ｃが挿入し易くなる。   As shown in FIG. 2, a floor slab 48 made of reinforced concrete is provided on the upper surface of the beam 12. Further, the notch portion 42 is formed between the upper surface of the base plate 26, the lower surfaces of the non-burning layer 20 and the burning allowance layer 22, and the lower surface of the base plate 26 with the gusset plate 24 fixed to the side surface of the column core material 18. And a gap of about 10 to 20 mm between the upper surface of the flame stop layer 20 and the burn allowance layer 22 (hereinafter, the gap formed on the upper surface of the base plate 26 is referred to as “upper joint”, The gap formed on the lower surface of the base plate 26 is referred to as “lower joint”). In this way, since the opening area of the notch 42 can be increased, the gusset plate 24 (base plate 26), the beam 12, and the refractory members 40A to 40C can be easily inserted.

上目地及び下目地には、ロックウール、モルタル等の断熱材Ｗが充填されて耐火処理が施されており、上目地及び下目地から熱が進入することを防いでいる。なお、上目地及び下目地に、断熱性を有する可撓性材料を充填することにより、燃え止まり層２０及び燃え代層２２が乾燥等により上下方向へ収縮した場合においても、上目地及び下目地が閉塞された状態を維持することができる。   The upper joint and the lower joint are filled with a heat insulating material W such as rock wool and mortar, and are subjected to a fireproofing treatment, thereby preventing heat from entering from the upper joint and the lower joint. In addition, when the upper joint and the lower joint are filled with a heat-insulating flexible material, the upper joint and the lower joint can be obtained even when the flame-stopping layer 20 and the burning allowance layer 22 contract in the vertical direction due to drying or the like. Can be kept closed.

接合構造１０を構築する施工方法は、まず、柱心材１８の側面にガセットプレート２４の背面３６を接触させてガセットプレート２４を配置した状態で、柱１４の柱心材１８に形成された貫通孔３８と、ベースプレート２６に形成された固定孔５４とへ、アンカーボルト２８を挿入する。   In the construction method for constructing the joint structure 10, first, the through-hole 38 formed in the column core 18 of the column 14 in a state in which the back surface 36 of the gusset plate 24 is brought into contact with the side surface of the column core 18 and the gusset plate 24 is disposed. Then, the anchor bolt 28 is inserted into the fixing hole 54 formed in the base plate 26.

次に、アンカーボルト２８の両端部にナット３０、３２を捩じ込み締め付けることによって、柱心材１８の側面にガセットプレート２４を固定する。   Next, the gusset plate 24 is fixed to the side surface of the column core member 18 by screwing and tightening the nuts 30 and 32 to both ends of the anchor bolt 28.

次に、高力ボルト４４及びナット４６により、ガセットプレート２４に梁１２をボルト接合する。   Next, the beam 12 is bolted to the gusset plate 24 by the high strength bolt 44 and the nut 46.

次に、切り欠き部３４に断熱材Ｍを充填し、上目地及び下目地に断熱材Ｗを充填した後に、梁１２の上面にコンクリートを打設して床版４８を形成する。   Next, the notch 34 is filled with the heat insulating material M, and the upper joint and the lower joint are filled with the heat insulating material W, and then concrete is placed on the upper surface of the beam 12 to form the floor slab 48.

なお、柱心材１８及び燃え代層２２は、木材によって形成されていればよい。例えば、柱心材１８及び燃え代層２２は、米松、唐松、檜、杉、あすなろ等の一般の木造建築に用いられる木材（以下、「一般木材」とする）によって形成してもよいし、これらの一般木材を板状や角柱状等の単材に加工し、この単材を複数集成し単材同士を接着剤により接着して一体化することによって形成してもよい。   In addition, the column core material 18 and the burning allowance layer 22 should just be formed with the timber. For example, the pillar core material 18 and the burning margin layer 22 may be formed of wood (hereinafter referred to as “general wood”) used in general wooden construction such as Yonematsu, Karamatsu, firewood, cedar, and Asunaro. The general wood may be processed into a single material such as a plate or a prism, and a plurality of such single materials may be assembled and bonded together with an adhesive to be integrated.

また、燃え止まり層２０は、火炎及び熱の進入を抑えて燃え止まり効果を発揮できる層であればよい。例えば、燃え止まり層２０は、難燃性を有する層や熱の吸収が可能な層であればよい。   Moreover, the flame stop layer 20 should just be a layer which can suppress a flame and the entrance | invasion of a heat | fever, and can exhibit a flame stop effect. For example, the flame stop layer 20 may be a layer having flame retardancy or a layer capable of absorbing heat.

難燃性を有する層としては、木材に難燃薬剤を注入して不燃化処理した難燃薬剤注入層が挙げられる。熱の吸収が可能な層は、一般木材よりも熱容量が大きな材料、一般木材よりも断熱性が高い材料、又は一般木材よりも熱慣性が高い材料によって形成してもよいし、これらの材料と一般木材とを組み合わせて形成してもよい（図３には、一般木材よりも熱容量が大きな材料であるモルタルによって形成された板部材５０と、一般木材によって形成された板部材５２とを交互に配置して、燃え止まり層２０を形成している例が示されている）。また、難燃性を有する層と、熱の吸収が可能な層とを組み合わせて（例えば、難燃性を有する層と、熱の吸収が可能な層とを交互に配置して）燃え止まり層２０を形成してもよい。   Examples of the flame retardant layer include a flame retardant chemical injection layer obtained by injecting a flame retardant chemical into wood and making it incombustible. The layer capable of absorbing heat may be formed of a material having a larger heat capacity than general wood, a material having higher thermal insulation than general wood, or a material having higher thermal inertia than general wood. It may be formed by combining with general wood (in FIG. 3, plate members 50 formed of mortar which is a material having a larger heat capacity than general wood and plate members 52 formed of general wood are alternately arranged. An example is shown in which it is arranged to form a flame stop layer 20). In addition, a flame-retardant layer is formed by combining a layer having flame retardancy and a layer capable of absorbing heat (for example, alternately arranging layers having flame retardancy and layers capable of absorbing heat). 20 may be formed.

一般木材よりも熱容量が大きな材料としては、モルタル、石材、ガラス、繊維補強セメント、石膏等の無機質材料、各種の金属材料などが挙げられる。一般木材よりも断熱性が高い材料としては、けい酸カルシウム板、ロックウール、グラスウールなどが挙げられる。一般木材よりも熱慣性が高い材料としては、セランガンバツ、ジャラ、ボンゴシ等の木材が挙げられる。   Examples of materials having a larger heat capacity than general wood include inorganic materials such as mortar, stone, glass, fiber reinforced cement, and plaster, and various metal materials. Examples of the material having higher heat insulation than general wood include calcium silicate board, rock wool, and glass wool. Examples of the material having higher thermal inertia than general wood include wood such as Selangan Batu, Jara, and Bongoshi.

次に、本発明の実施形態に係る構造部材の接合構造の作用と効果について説明する。   Next, the operation and effect of the joint structure for structural members according to the embodiment of the present invention will be described.

本発明の実施形態の接合構造１０では、図１〜３に示すように、高力ボルト４４及びナット４６によってガセットプレート２４に梁１２をボルト接合することにより、梁１２がガセットプレート２４にピン接合される。これによって、梁１２は柱１４にピン接合される。また、ガセットプレート２４により梁１２から柱心材１８へ、及び柱心材１８から梁１２へ力が伝えられることによって、梁１２と柱１４との接合強度を確実に確保することができる。   In the joint structure 10 according to the embodiment of the present invention, the beam 12 is pin-joined to the gusset plate 24 by bolting the beam 12 to the gusset plate 24 with high-strength bolts 44 and nuts 46 as shown in FIGS. Is done. As a result, the beam 12 is pin-joined to the column 14. In addition, since the force is transmitted from the beam 12 to the column core member 18 and from the column core member 18 to the beam 12 by the gusset plate 24, the bonding strength between the beam 12 and the column 14 can be reliably ensured.

また、図３に示すように、柱１４において、火災が発生したときに火炎が燃え代層２２に着火し、燃え代層２２が燃焼する。そして、燃焼した燃え代層２２は炭化する。これにより、柱１４の外部から柱心材１８への熱伝達と酸素供給とを炭化した燃え代層２２が遮断し、燃え止まり層２０が吸熱するので、火災（加熱）時及び火災（加熱）終了後における柱心材１８の温度上昇を抑制することができる。   Further, as shown in FIG. 3, in the pillar 14, when a fire occurs, a flame ignites the burning allowance layer 22 and the burning allowance layer 22 burns. The burned combustion allowance layer 22 is carbonized. As a result, the burning allowance layer 22 that carbonizes heat transfer from the outside of the pillar 14 to the pillar core material 18 and the oxygen supply is cut off, and the burning stop layer 20 absorbs heat, so at the time of fire (heating) and the end of fire (heating) The temperature rise of the column core material 18 afterwards can be suppressed.

よって、火災（加熱）時及び火災（加熱）終了後において、所定時間（例えば、１時間耐火の場合には、１時間）の間、柱１４の柱心材１８を燃焼開始温度未満に抑え、柱心材１８を燃焼させずに燃え止まらせることができる。   Therefore, during the fire (heating) and after the end of the fire (heating), the column core material 18 of the column 14 is kept below the combustion start temperature for a predetermined time (for example, 1 hour in the case of fire resistance for 1 hour). The core material 18 can be burned off without burning.

さらに、被覆層１６によって、火災により加熱された梁１２から柱１４の柱心材１８へ伝達される熱を柱心材１８が燃焼しない温度（燃焼開始温度未満の温度）にすることにより、柱１４の柱心材１８が燃焼するのを防ぐことができる。これにより、火災時において柱１４の耐火性が確保され、構造部材としての柱１４の健全性を維持することができる。   Further, the covering layer 16 changes the heat transferred from the beam 12 heated by the fire to the column core material 18 of the column 14 to a temperature at which the column core material 18 does not burn (temperature lower than the combustion start temperature). It is possible to prevent the column core material 18 from burning. Thereby, the fire resistance of the pillar 14 is ensured at the time of a fire, and the soundness of the pillar 14 as a structural member can be maintained.

また、柱１４の耐火性は、梁１２に設ける耐火被覆（被覆層１６）により得られるので、梁１２と柱１４とを一般的な接合方法で接合することができる。   Moreover, since the fire resistance of the column 14 is obtained by the fireproof coating (coating layer 16) provided on the beam 12, the beam 12 and the column 14 can be joined by a general joining method.

また、図２、３に示すように、被覆層１６を板状の耐火部材４０Ａ〜Ｃとすることにより、吹き付けにより被覆層を形成するよりも簡単に被覆層を形成することができる。   As shown in FIGS. 2 and 3, the cover layer 16 can be formed into plate-like fireproof members 40 </ b> A to 40 </ b> C, so that the cover layer can be formed more easily than when the cover layer is formed by spraying.

さらに、耐火部材４０Ａ、４０Ｂの端部（端面）と、燃え止まり層２０の側面とが、直接又は耐火シールを介して繋がっているので、耐火部材４０Ａ、４０Ｂの端部と、燃え止まり層２０との間から柱１４の柱心材１８へ熱が伝わるのを抑制することができる。   Furthermore, since the edge part (end surface) of the refractory members 40A and 40B and the side surface of the flame stop layer 20 are connected directly or via a fireproof seal, the end part of the fire resistant members 40A and 40B and the flame stop layer 20 are connected. It is possible to suppress the heat from being transmitted to the column core material 18 of the column 14.

以上、本発明の実施形態について説明した。   The embodiment of the present invention has been described above.

なお、本実施形態では、図２に示すように、柱心材１８の側面にガセットプレート２４を固定した例を示したが、梁１２から柱心材１８へ、及び柱心材１８から梁１２へ力を伝えることができれば、燃え止まり層２０や燃え代層２２へガセットプレート２４を固定してもよい。   In the present embodiment, as shown in FIG. 2, an example in which the gusset plate 24 is fixed to the side surface of the column core member 18 is shown, but force is applied from the beam 12 to the column core member 18 and from the column core member 18 to the beam 12. If it can be communicated, the gusset plate 24 may be fixed to the flame stop layer 20 or the burn allowance layer 22.

また、本実施形態では、図２に示すように、アンカーボルト２８を用いて柱１４の柱心材１８にガセットプレート２４を固定した例を示したが、ガセットプレート２４を柱心材１８に確実に固定できれば、他の固定方法を用いてもよい。例えば、ラグスクリューで柱心材１８にガセットプレート２４を固定してもよい。   Further, in the present embodiment, as shown in FIG. 2, the example in which the gusset plate 24 is fixed to the column core 18 of the column 14 using the anchor bolt 28 is shown, but the gusset plate 24 is securely fixed to the column core 18. If possible, other fixing methods may be used. For example, the gusset plate 24 may be fixed to the column core 18 with a lag screw.

さらに、本実施形態では、耐火部材４０Ａ、４０Ｂの端部（端面）と、燃え止まり層２０の側面とを、直接又は耐火シールを介して繋げた例を示したが、例えば、図４の平断面図に示す構造部材の接合構造７４の構成にしてもよい。図４では、燃え止まり層２０の梁１２側コーナー部に位置する板部材５０を、柱１４の梁１２側の側面へ達するように設け、このコーナー部に位置する板部材５０の側面５６と、耐火部材４０Ａ、４０Ｂの端部（端面）とを、直接又は耐火シールを介して繋げている。   Furthermore, in this embodiment, although the example which connected the edge part (end surface) of the fireproof members 40A and 40B and the side surface of the flame stop layer 20 directly or through the fireproof seal was shown, for example, the plane of FIG. You may make it the structure of the joining structure 74 of the structural member shown in sectional drawing. In FIG. 4, the plate member 50 located at the beam 12 side corner portion of the flame stop layer 20 is provided so as to reach the side surface of the column 14 on the beam 12 side, and the side surface 56 of the plate member 50 located at this corner portion; The ends (end surfaces) of the fireproof members 40A and 40B are connected directly or via a fireproof seal.

また、本実施形態では、耐火被覆としての被覆層１６を、けい酸カルシウム板により構成された板状の耐火部材４０Ａ〜Ｃによって形成した例を示したが、この耐火被覆（被覆層１６）は、火災時に梁１２が耐火温度（梁１２を構成するＨ形鋼が殆ど耐力低下せずに構造部材としての健全性を維持できる温度であり、例えば、３５０°Ｃ）よりも高い温度にならないように被覆でき、且つ、火災により加熱された梁１２から柱１４の柱心材１８へ伝達される熱を柱心材１８が燃焼しない温度（柱心材１８の燃焼開始温度未満の温度であり、例えば、２６０°Ｃ）よりも高い温度にならないように被覆できれば、けい酸カルシウム板以外のものを用いて形成してもよい。例えば、湿式の耐火塗料、吹き付けロックウール、乾式のロックウールシート、高耐熱ロックウールシート、熱膨張シート、けい酸カルシウム板、石膏ボード、木製ボード、コンクリート部材によって耐火被覆を形成してもよい。   Moreover, in this embodiment, although the example which formed the coating layer 16 as fireproof coating by the plate-shaped fireproof members 40A-C comprised by the calcium silicate board was shown, this fireproof coating (coating layer 16) is shown. In the event of a fire, the beam 12 does not reach a temperature higher than the fireproof temperature (the temperature at which the H-shaped steel constituting the beam 12 can maintain its soundness as a structural member with almost no decrease in yield strength, eg, 350 ° C.) The temperature at which the column core 18 does not burn the heat transmitted from the beam 12 heated by the fire to the column core 18 of the column 14 (a temperature lower than the combustion start temperature of the column core 18; for example, 260 As long as it can be coated so as not to reach a temperature higher than ° C), it may be formed using a material other than the calcium silicate plate. For example, the fireproof coating may be formed of wet fireproof paint, sprayed rock wool, dry rock wool sheet, high heat resistant rock wool sheet, thermal expansion sheet, calcium silicate board, gypsum board, wooden board, concrete member.

乾式の耐火被覆材は、梁１２を構成するＨ形鋼に、直貼りで取り付けてもよいし、箱貼りで取り付けてもよい。また、仕上げ材の木製ボードを、耐火被覆材として用いれば、美観を良くして意匠性を向上させることができる。木製ボードは、火災時に燃焼して炭化することにより、木製ボードの外部から梁１２への熱伝達と酸素供給とを遮断し、梁１２の温度上昇を抑制することができる。一般に、木材は１分間に０．６ｍｍ程度燃え進むので、木製ボードを１時間耐火の耐火被覆材として用いる場合には、３６ｍｍ（＝０．６ｍｍ×６０分）以上の厚さにすればよい。   The dry fireproof coating material may be attached directly to the H-shaped steel constituting the beam 12 or may be attached by box attachment. Moreover, if the wooden board of a finishing material is used as a fireproof coating material, it can improve aesthetics and can improve design. By burning and carbonizing the wooden board in the event of a fire, heat transfer from the outside of the wooden board to the beam 12 and oxygen supply can be blocked, and the temperature rise of the beam 12 can be suppressed. In general, wood burns about 0.6 mm per minute. Therefore, when a wooden board is used as a fireproof coating material that is fireproof for 1 hour, the thickness may be 36 mm (= 0.6 mm × 60 minutes) or more.

図５の斜視図には、梁１２を覆う耐火被覆としての被覆層５８を、吹き付けロックウール６０によって形成した構造部材の接合構造７６の例が示され、図６の斜視図には、梁１２を覆う耐火被覆としての被覆層６２を、コンクリート６４を打設して形成した構造部材の接合構造７８の例が示されている。   The perspective view of FIG. 5 shows an example of a joining structure 76 of structural members in which a coating layer 58 as a fireproof coating covering the beam 12 is formed by spraying rock wool 60, and the perspective view of FIG. The example of the joining structure 78 of the structural member which formed the covering layer 62 as a fireproof covering which covers the concrete 64 from the concrete is shown.

さらに、鋼材が埋設された木質ハイブリッド部材を梁１２として用いてもよい。木質ハイブリッド部材では、鋼材を覆う木材が耐火被覆の役割りを果たす。   Furthermore, a wood hybrid member in which steel material is embedded may be used as the beam 12. In the wood hybrid member, the wood covering the steel material serves as a fireproof coating.

また、同種又は異種の耐火被覆材を複数重ねて設けるようにしてもよい。図７の横断面図には、梁１２を覆う被覆層６６を吹き付けロックウール６０によって形成し、被覆層６６を覆う被覆層６８を耐火部材４０Ａ〜Ｃによって形成した構造部材の接合構造８０の例が示されている。すなわち、図７では、複数の耐火被覆材（被覆層６６、６８）が重ねて設けられている。   Moreover, you may make it provide the same kind or different kind of fireproof coating material in piles. In the cross-sectional view of FIG. 7, an example of a joining structure 80 of structural members in which a covering layer 66 covering the beam 12 is formed by spraying rock wool 60 and the covering layer 68 covering the covering layer 66 is formed by the refractory members 40A to 40C. It is shown. That is, in FIG. 7, a plurality of fireproof covering materials (covering layers 66 and 68) are provided in an overlapping manner.

また、本実施形態では、梁１２を被覆層１６で覆う例を示したが、梁１２の接合端部７０（図１を参照のこと）を覆う被覆層１６の被覆厚さよりも、接合端部７０以外の梁１２の部位（例えば、梁１２の中央部）を覆う被覆層１６の被覆厚さを薄くしてもよい。例えば、梁１２の接合端部７０を覆う被覆層１６の被覆厚さを、梁１２の温度を２６０°Ｃ以下に抑える被覆厚さにし、梁１２の中央部を覆う被覆層１６の被覆厚さを、梁１２の温度を３５０°Ｃ以下に抑える被覆厚さにする。   Moreover, in this embodiment, although the example which covers the beam 12 with the coating layer 16 was shown, joining edge part rather than the coating thickness of the coating layer 16 which covers the joining edge part 70 (refer FIG. 1) of the beam 12 is shown. The covering thickness of the covering layer 16 that covers a portion of the beam 12 other than 70 (for example, the central portion of the beam 12) may be reduced. For example, the coating thickness of the coating layer 16 that covers the joint end portion 70 of the beam 12 is set to a coating thickness that suppresses the temperature of the beam 12 to 260 ° C. or less, and the coating thickness of the coating layer 16 that covers the central portion of the beam 12. Is set to a coating thickness that suppresses the temperature of the beam 12 to 350 ° C. or less.

このようにすれば、柱１４の耐火性能を大きく低下させることなく、梁１２全体に対する耐火被覆の被覆量を抑えることができる。これにより、耐火被覆を含めた梁１２の軽量化を図ることができる。   If it does in this way, the covering amount of the fireproof covering with respect to the whole beam 12 can be suppressed, without reducing the fireproof performance of the pillar 14 significantly. Thereby, the weight reduction of the beam 12 including a fireproof coating can be achieved.

さらに、本実施形態では、第１構造部材をＨ形鋼によって構成された鋼製梁（梁１２）とし、第２構造部材を柱心材１８、燃え止まり層２０、及び燃え代層２２によって構成された木製柱（柱１４）とした例を示したが、第１構造部材をＨ形鋼によって構成された鋼製柱とし、第２構造部材を心材、燃え止まり層、及び燃え代層によって構成された木製梁としてもよい。また、本実施形態の接合構造１０を他の構造部材同士の接合（鋼製の構造部材と木製の構造部材との接合）に用いてもよい。   Furthermore, in the present embodiment, the first structural member is a steel beam (beam 12) made of H-shaped steel, and the second structural member is made up of the column core material 18, the dead end layer 20, and the burning allowance layer 22. In this example, the first structural member is a steel column composed of H-shaped steel, and the second structural member is composed of a core material, a dead end layer, and a burning allowance layer. It may be a wooden beam. Moreover, you may use the joining structure 10 of this embodiment for joining of other structural members (joining of a steel structural member and a wooden structural member).

また、本実施形態では、図２に示すように、梁１２をガセットプレート２４にボルト接合することにより、柱１４に梁１２をピン接合した例を示したが、柱１４に梁１２を剛接合してもよい。   Further, in the present embodiment, as shown in FIG. 2, an example in which the beam 12 is pin-bonded to the column 14 by bolting the beam 12 to the gusset plate 24 is shown, but the beam 12 is rigidly bonded to the column 14. May be.

さらに、本実施形態では、図１に示すように、柱１４に１つの梁１２を接合した例を示したが、柱１４に接合する梁１２はいくつでもよい。例えば、１つの梁１２のみを柱１４に接合してもよいし、平面視にて一直線状、Ｌ字状又はＴ字状に配置されるように２つ又は３つの梁１２を柱１４に接合してもよいし、平面視にて放射状に配置されるように４つの梁１２を柱１４に接合してもよい。   Further, in the present embodiment, as shown in FIG. 1, an example in which one beam 12 is joined to the column 14 is shown, but any number of beams 12 to be joined to the column 14 may be used. For example, only one beam 12 may be joined to the column 14, or two or three beams 12 may be joined to the column 14 so as to be arranged in a straight line, an L shape, or a T shape in plan view. Alternatively, the four beams 12 may be joined to the columns 14 so as to be radially arranged in a plan view.

さらに、本実施形態では、図１に示すように、第２構造部材としての柱１４が、荷重を支持する木製の心材としての柱心材１８と、柱心材１８の周囲を取り囲む燃え止まり層２０と、燃え止まり層２０の周囲を取り囲む木製の燃え代層２２とを備えている例を示したが、第２構造部材は、荷重を支持する木製の心材と、この心材の周囲を取り囲む燃え止まり層とを有していればよい。すなわち、燃え代層２２は適宜設ければよく、また、燃え止まり層２０の周囲を燃え代層２２以外の層（例えば、薄い木製の仕上げ材）で取り囲むようにしてもよい。   Further, in the present embodiment, as shown in FIG. 1, the column 14 as the second structural member includes a column core 18 as a wooden core that supports a load, and a flame stop layer 20 surrounding the column core 18. Although the example provided with the wood burning allowance layer 22 surrounding the periphery of the flame stop layer 20 is shown, the second structural member includes the wood core material supporting the load and the flame stop layer surrounding the periphery of the heart material. As long as it has. That is, the burn allowance layer 22 may be provided as appropriate, and the periphery of the flame stop layer 20 may be surrounded by a layer other than the burn allowance layer 22 (for example, a thin wooden finish).

以上、本発明の実施形態について説明したが、本発明はこうした実施形態に何等限定されるものでなく、本発明の要旨を逸脱しない範囲において、種々なる態様で実施し得ることは勿論である。   As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment at all, Of course, in the range which does not deviate from the summary of this invention, it can implement in a various aspect.

１０、７４、７６、７８、８０ 構造部材の接合構造
１２ 梁（第１構造部材）
１４ 柱（第２構造部材）
１６、５８、６２、６６、６８ 被覆層
１８ 柱心材（心材）
２０ 燃え止まり層
２４ ガセットプレート（接合部材）
７０ 接合端部 10, 74, 76, 78, 80 Structural member joint structure 12 Beam (first structural member)
14 Pillar (second structural member)
16, 58, 62, 66, 68 Coating layer 18 Column core material (core material)
20 Flame stop layer 24 Gusset plate (joining member)
70 Joint end

Claims (3)

鋼製の第１構造部材と、
荷重を支持する木製の心材と前記心材の周囲を取り囲む燃え止まり層とを備えた第２構造部材と、
前記燃え止まり層を介さずに前記心材に固定され、前記第１構造部材と前記第２構造部材とを接合し、前記第１構造部材から前記心材へ及び前記心材から前記第１構造部材へ力を伝える接合部材と、
前記第１構造部材を覆い、該第１構造部材から前記心材へ伝達される熱を前記心材が燃焼しない温度にする被覆層と、
を有する構造部材の接合構造。 A first structural member made of steel;
A second structural member comprising a wooden core material supporting a load and a dead end layer surrounding the core material;
It is fixed to the core material without going through the flame stop layer, and joins the first structural member and the second structural member, and forces force from the first structural member to the core material and from the core material to the first structural member. A joining member that conveys
A coating layer that covers the first structural member and sets the heat transferred from the first structural member to the core material so that the core material does not burn;
Bonding structure of structural members having 鋼製の第１構造部材と、
荷重を支持する木製の心材と前記心材の周囲を取り囲む燃え止まり層とを備えた第２構造部材と、
前記第１構造部材と前記第２構造部材とを接合し、前記第１構造部材から前記心材へ及び前記心材から前記第１構造部材へ力を伝える接合部材と、
前記第１構造部材を覆い、該第１構造部材から前記心材へ伝達される熱を前記心材が燃焼しない温度にする被覆層と、
を有し、
前記被覆層は、前記第１構造部材の周囲を取り囲む板状の耐火部材であり、
該耐火部材の端部と前記燃え止まり層とが、直接又は耐火シールを介して繋がっている構造部材の接合構造。 A first structural member made of steel;
A second structural member comprising a wooden core material supporting a load and a dead end layer surrounding the core material;
A joining member that joins the first structural member and the second structural member and transmits a force from the first structural member to the core material and from the core material to the first structural member;
A coating layer that covers the first structural member and sets the heat transferred from the first structural member to the core material so that the core material does not burn;
Have
The covering layer is a plate-like fireproof member that surrounds the periphery of the first structural member,
Structure for joining refractory end portion and the burning blind layer member and is, directly or structural member that has led through the refractory seal. 前記第１構造部材の接合端部を覆う前記被覆層の厚さよりも、前記接合端部以外の前記第１構造部材の部位を覆う前記被覆層の厚さを薄くする請求項１又は２に記載の構造部材の接合構造。   The thickness of the said coating layer which covers the site | parts of the said 1st structural member other than the said joining edge part is made thinner than the thickness of the said coating layer which covers the joining edge part of the said 1st structural member. Bonding structure of structural members.
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