JP2005200994A - Joining structure of closed cross-sectional member - Google Patents

Joining structure of closed cross-sectional member Download PDF

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JP2005200994A
JP2005200994A JP2004010121A JP2004010121A JP2005200994A JP 2005200994 A JP2005200994 A JP 2005200994A JP 2004010121 A JP2004010121 A JP 2004010121A JP 2004010121 A JP2004010121 A JP 2004010121A JP 2005200994 A JP2005200994 A JP 2005200994A
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column
joining
sleeve
closed cross
steel
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Kuniaki Sato
邦昭 佐藤
Koji Shimada
晃治 嶋田
Takuro Yaguchi
卓郎 矢口
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Artes Corp
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Artes Corp
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<P>PROBLEM TO BE SOLVED: To provide an aesthetic compact joining part without substantially anything outside the joining part, for extremely easily performing joining work at a job site, by providing sufficient joining strength by a relatively easy and inexpensive joining structure, in the joining structure such as a column base for joining a column and a column and joining the column and a concrete member. <P>SOLUTION: A plurality of sleeves 10 are fixed in advance by welding in a factory at an interval in the column peripheral direction in parallel to the column axis direction on an inside surface in a joining end part of an upper column 1 and a lower column 2 composed of a square steel pipe and a circular steel pipe of a closed cross-sectional steel frame. A lower part of deformed bar steel 11 is inserted into the lower sleeve 10, and is fixed by a grout material 12. The upper column 1 is suspended on the lower column 2. The upper column 1 is built up on the lower column 2 while inserting an upper part of the deformed bar steel 11 into the upper sleeve 10, and the upper sleeve 10 and the deformed bar steel 11 are fixed by filling the grout material 12 in the upper sleeve 10 or the lower part of the deformed bar steel 11 is temporarily fastened in the lower sleeve 10 by a positioning spacer, to be simultaneously grouted by the upper column and the lower column. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、建築や土木構造物における円形鋼管や角形鋼管等の閉鎖断面部材の接合、例えば、柱と柱の接合、柱と鉄筋コンクリート部材の接合、柱脚などに適用される閉鎖断面部材の接合構造に関するものである。   The present invention relates to the joining of closed cross-section members such as circular steel pipes and rectangular steel pipes in buildings and civil engineering structures, for example, joining of columns and columns, joining of columns and reinforced concrete members, joining of cross-sectional members applied to column bases, etc. Concerning structure.

従来、鉄骨柱と鉄骨柱の接合には、所謂エレクションピースが用いられている。図7は、工事現場において角形鋼管からなる上柱1と下柱2とを接合する例であり、上柱1と下柱2の接合端部における外側面にそれぞれ取付板50を予め溶接しておき(工場溶接)、上下の取付板50を継手板51を用いボルト接合して仮固定する。上柱1と下柱2の接合端面には溶接開先が予め形成されており(工場加工)、現場溶接により上柱1と下柱2とが接合一体化される。溶接完了後に取付板50が切断除去される。円形鋼管の場合も同様である。   Conventionally, a so-called erection piece is used for joining a steel column and a steel column. FIG. 7 is an example in which the upper column 1 and the lower column 2 made of a square steel pipe are joined at a construction site. The mounting plates 50 are respectively welded in advance to the outer surfaces at the joining end portions of the upper column 1 and the lower column 2. Every time (factory welding), the upper and lower mounting plates 50 are bolted using the joint plate 51 and temporarily fixed. A welding groove is formed in advance on the joining end face of the upper pillar 1 and the lower pillar 2 (factory processing), and the upper pillar 1 and the lower pillar 2 are joined and integrated by field welding. The attachment plate 50 is cut and removed after the welding is completed. The same applies to a round steel pipe.

図8は、従来の柱脚の例であり、角形鋼管からなる柱3の接合端面にベースプレート60が溶接で固定されており、基礎コンクリート4内に埋設固定されたアンカーボルト61の先端部をベースプレート60の取付穴に挿通し、ナット62を締め付けることでベースプレート60を基礎上に固定している。このような柱脚の曲げモーメントは、ベースプレート60の一端で圧縮力として基礎に伝達され、他端で引張力としてアンカーボルト61に伝達され、定着金物63により基礎に伝達される。なお、基礎には、アンカーボルト61の定着力を基礎に分布伝達させるため、アンカーボルト外周を囲むように主筋とフープ筋からなる鉄筋籠が埋設されている(図示省略) 。   FIG. 8 shows an example of a conventional column base, in which a base plate 60 is fixed to a joint end surface of a column 3 made of a square steel pipe by welding, and the tip of an anchor bolt 61 embedded and fixed in the foundation concrete 4 is attached to the base plate. The base plate 60 is fixed on the foundation by being inserted into the mounting holes 60 and tightening the nuts 62. Such a column base bending moment is transmitted to the foundation as a compressive force at one end of the base plate 60, transmitted to the anchor bolt 61 as a tensile force at the other end, and transmitted to the foundation by the fixing hardware 63. In addition, in order to distribute and transmit the fixing force of the anchor bolt 61 to the foundation, a reinforcing bar rod composed of a main bar and a hoop bar is embedded so as to surround the outer periphery of the anchor bolt (not shown).

また、本発明に関連する先行技術文献として、接合スリーブと異形棒鋼とグラウト材を用いた鉄骨構造物の柱・梁接合部構造(特許文献1参照)、接合金物と接合ボルトを用いた柱・梁の接合部構造(特許文献2参照)、内面に凹凸が設けられたスリーブ金物と異形棒鋼と高強度モルタルを用いた鉄骨柱と基礎コンクリートとの接合構造(特許文献3参照)、内面に凹凸が設けられた断面略U字状のスリーブ状接合金物と異形棒鋼とグラウト材を用いたアンカー筋の接合金物・接合構造・接合方法(特願2002ー256495)等がある。
特許第2954548号公報 特許第3129685号公報 特許第3189953号公報
Further, as prior art documents related to the present invention, a steel structure column / beam joint structure using a joining sleeve, a deformed steel bar and a grout material (see Patent Document 1), a joint using a joint hardware and a joint bolt / Beam joint structure (see patent document 2), sleeve metal structure with irregularities on the inner surface, deformed steel bar, steel column and basic concrete using high strength mortar (see patent document 3), irregularities on the inner surface There are a sleeve-shaped joint metal having a substantially U-shaped cross-section, an anchor bar joint metal / joint structure / joint method (Japanese Patent Application No. 2002-256495) using a deformed steel bar and a grout material.
Japanese Patent No. 2945548 Japanese Patent No. 3129685 Japanese Patent No. 3189953

従来の図7のエレクションピースによる鉄骨柱と鉄骨柱の接合の場合、取付板50の切断除去に際して、柱母材3を傷めるため、取付板50を完全に除去することができず、図7(b) に示すように、取付板50の基部が残る欠点がある。外観を損なうだけでなく、切削仕上をしても、取付板50の溶接部分が起点となって、地震時にぜい性破壊を起す危険性がある。さらに、鋼管内部にコンクリートを充填したPC柱の場合、現場溶接の熱の影響で内部コンクリートが劣化するため、これを避けるべく、熱影響が予想される部分を空洞化し、溶接後、柱の側面の穴からコンクリートを充填せざるを得ない。あるいは、下柱の途中までコンクリートを充填し、上柱は接合後に頂部からコンクリートを流し込み、もしくは柱側面に穴をあけコンクリートを圧入する。何れにせよ、現場での施工性が悪いという問題がある。   In the case of joining the steel column and the steel column by the conventional erection piece of FIG. 7, the column base material 3 is damaged when the mounting plate 50 is cut and removed, and therefore the mounting plate 50 cannot be completely removed. As shown in b), there is a drawback that the base of the mounting plate 50 remains. In addition to impairing the appearance, there is a risk of causing brittle fracture during an earthquake due to the welded portion of the mounting plate 50 as a starting point even if the finishing is performed. Furthermore, in the case of a PC column filled with concrete inside the steel pipe, the internal concrete deteriorates due to the effect of the heat of field welding. To avoid this, the part where the thermal effect is expected is hollowed out, and after welding, the side of the column It must be filled with concrete from the hole. Alternatively, concrete is filled up to the middle of the lower column, and the upper column is poured from the top after joining, or a hole is made in the side of the column and pressed into the concrete. In any case, there is a problem that workability on site is poor.

従来の図8のベースプレートとアンカーボルトによる柱脚の場合、アンカーボルト61がベースプレート60上でナット62で固定されているため、圧縮側ではアンカーボルト61が無効となる。また、ベースプレート60が大きく、基礎コンクリート4の立上がり幅aはベースプレート60の外側に余幅bが必要となり、柱の位置は隣地境界線より後退せざるを得ない。さらに、デザインの面でアンカーボルト61の先端部とナット62を隠すために増打コンクリート5が必要な場合が多い。   In the case of the column base using the base plate and the anchor bolt shown in FIG. 8, the anchor bolt 61 is fixed on the base plate 60 with the nut 62, so that the anchor bolt 61 becomes invalid on the compression side. Further, the base plate 60 is large, and the rising width a of the foundation concrete 4 requires an extra width b on the outside of the base plate 60, and the position of the column is forced to recede from the boundary line of the adjacent land. Furthermore, in order to conceal the tip end portion of the anchor bolt 61 and the nut 62 in terms of design, it is often necessary to use the additional concrete 5.

本発明は、建築や土木構造物における円形鋼管や角形鋼管等の閉鎖断面部材の接合、例えば、柱と柱の接合、柱と鉄筋コンクリート部材の接合、柱脚などの接合構造において、比較的簡易で低コストの接合構造により十分な接合強度が得られると共に、現場での接合作業が極めて容易となり、しかも接合部の外側に突起物が何もない美麗でコンパクトな接合部が得られる閉鎖断面部材の接合構造を提供することを目的としている。   The present invention is relatively simple in the joining of closed cross-section members such as circular steel pipes and rectangular steel pipes in buildings and civil engineering structures, for example, in joining structures of columns and columns, joining columns and reinforced concrete members, and column bases. A low-cost joint structure that provides sufficient joint strength and is extremely easy to perform on-site joining, and also provides a beautiful and compact joint with no protrusions on the outside of the joint. The object is to provide a joint structure.

本発明の請求項1は、閉鎖断面鉄骨柱と閉鎖断面鉄骨柱とを接合するための接合構造であり、上下の閉鎖断面鉄骨柱(角形鋼管や円形鋼管など) のそれぞれの接合端部における内側面に、柱軸方向に平行なスリーブ(内面に凹凸の付いたスリーブまたは内面に凹凸のないスリーブ) が柱周方向に間隔をおいて複数固着(突合せ溶接、すみ肉溶接、溝溶接など) され、上下の閉鎖断面鉄骨柱の上下のスリーブ内にそれぞれ異形棒鋼の上部と下部が挿入され、前記上下のスリーブ内にグラウト材(高強度モルタルや樹脂系接着剤など)が充填されていることを特徴とする閉鎖断面部材の接合構造である(図1参照、以下、第1発明という) 。   Claim 1 of the present invention is a joint structure for joining a closed cross-section steel column and a closed cross-section steel column to each other at the joint end of each of the upper and lower closed cross-section steel columns (such as a square steel pipe and a round steel pipe). A plurality of sleeves parallel to the column axis direction (sleeves with irregularities on the inner surface or sleeves without irregularities on the inner surface) are fixed on the side surface at intervals in the column circumferential direction (butt welding, fillet welding, groove welding, etc.) The upper and lower portions of deformed steel bars are inserted into the upper and lower sleeves of the upper and lower closed steel columns, respectively, and the upper and lower sleeves are filled with grout material (high-strength mortar, resin adhesive, etc.) This is a feature of a closed cross-section member joining structure (see FIG. 1, hereinafter referred to as a first invention).

この請求項1は、鋼管柱同士あるいはコンクリート充填鋼管柱同士などの接合に適用されるものである。接合作業は次のように行う。上柱の下部と下柱の上部の内部に、それぞれ上下のスリーブが予め工場等で溶接により固定されており、下柱の下スリーブに異形棒鋼の下部を挿入し、この下スリーブ内にグラウト材を充填し、異形棒鋼を所定のスリーブ定着長分だけ突出させて固定しておき、この下柱の上に上柱を吊り込み、異形棒鋼の上部を上スリーブ内に挿入しつつ下柱上に上柱を建て込み、上スリーブ内にグラウト材を注入し、異形棒鋼の上部を上スリーブに固定する。あるいは下スリーブに異形棒鋼をスペーサー等を用いて仮固定しておき、下スリーブと上スリーブ同時に工事現場でグラウトすることもできる。上柱と下柱とが、柱内部の上下のスリーブと異形棒鋼とグラウト材とにより接合一体化される。   The first aspect is applied to joining steel pipe columns or concrete-filled steel pipe columns. The joining operation is performed as follows. Upper and lower sleeves are fixed in advance by welding at the factory, etc., in the lower part of the upper pillar and the upper part of the lower pillar. The lower part of the deformed steel bar is inserted into the lower sleeve of the lower pillar, and the grout material is inserted into the lower sleeve. The deformed bar is protruded and fixed by the fixed length of the sleeve, and the upper column is suspended on the lower column, and the upper portion of the deformed bar is inserted into the upper sleeve and placed on the lower column. The upper pillar is built, grout material is poured into the upper sleeve, and the upper part of the deformed steel bar is fixed to the upper sleeve. Alternatively, a deformed steel bar is temporarily fixed to the lower sleeve using a spacer or the like, and the lower sleeve and the upper sleeve can be grouted simultaneously at the construction site. The upper column and the lower column are joined and integrated by the upper and lower sleeves inside the column, the deformed steel bar, and the grout material.

以上のような本発明の柱と柱の接合構造によれば、(a) 従来の柱と柱の接合における取付板及び継手板が不要となる、(b) 現場溶接が不要となる、(c) 現場溶接後の取付板の切断除去作業が不要となる、(d) 取付板を切断除去した箇所からのぜい性破壊の危険性が無くなる、(e) 接合時間が溶接の 1/3〜1/5 となり、現場での作業性が良い、(f) PC化した柱の場合、予め工場等で柱の端面までコンクリートを打設しておくことができ、従来のような現場でのコンクリート充填が不要となる、(g) 接合部の外面には何も無く、美麗であると共に、連続した平面が得られる。   According to the column-to-column joining structure of the present invention as described above, (a) the mounting plate and the joint plate in the conventional column-to-column joining are not required, (b) on-site welding is not required, (c ) Eliminates the need to cut and remove the mounting plate after on-site welding, (d) eliminates the risk of brittle fracture from the location where the mounting plate is cut and removed, (e) the joining time is 1/3 to (F) In the case of a PC column, concrete can be placed up to the end face of the column in advance at a factory, etc. (G) There is nothing on the outer surface of the joint, and it is beautiful and a continuous plane can be obtained.

本発明の請求項2は、閉鎖断面鉄骨柱をコンクリート部材に接合するための接合構造であり、閉鎖断面鉄骨柱(角形鋼管や円形鋼管など) の接合端部における内側面に、柱軸方向に平行なスリーブ(内面に凹凸の付いたスリーブまたは内面に凹凸のないスリーブ) が柱周方向に間隔をおいて複数固着(突合せ溶接、すみ肉溶接、柱外側からの溝溶接など) され、コンクリート部材内に基部が埋設固定された異形棒鋼の先端部が前記スリーブ内に挿入され、このスリーブ内にグラウト材(高強度モルタルや樹脂系接着剤など)が充填されていることを特徴とする閉鎖断面部材の接合構造である(図2参照、以下、第2発明という) 。   Claim 2 of the present invention is a joint structure for joining a closed cross-section steel column to a concrete member, on the inner side surface of the joint end of a closed cross-section steel column (such as a square steel pipe or a round steel pipe) in the direction of the column axis. Multiple parallel sleeves (sleeves with irregularities on the inner surface or sleeves without irregularities on the inner surface) are fixed at intervals in the circumferential direction of the column (butt welding, fillet welding, groove welding from the outside of the column, etc.). A closed cross section characterized in that the tip of a deformed steel bar whose base is embedded and fixed is inserted into the sleeve, and the sleeve is filled with grout material (high strength mortar, resin adhesive, etc.) This is a joining structure of members (see FIG. 2, hereinafter referred to as a second invention).

この請求項2は、鋼管柱と、下部コンクリート、基礎コンクリート(柱脚) あるいは鉄筋コンクリート柱などとの接合に適用されるものである。接合作業は次のように行う。下部のコンクリート部材内には異形棒鋼が所定のスリーブ定着長分だけ突出させて埋設されており、柱の下部の内部には、スリーブが予め工場等で溶接により固定されており、下部のコンクリート部材の上に柱を吊り込み、異形棒鋼の上部をスリーブ内に挿入しつつコンクリート部材上に柱を建て込み、柱のスリーブ内にグラウト材を注入し、異形棒鋼の上部をスリーブに固定する。柱とコンクリート部材とが、柱内部のスリーブと異形棒鋼とグラウト材とにより接合一体化される。   The second aspect of the present invention is applied to the joining of a steel pipe column and lower concrete, foundation concrete (column base), reinforced concrete column or the like. The joining operation is performed as follows. A deformed steel bar is embedded in the lower concrete member so as to protrude by a predetermined sleeve fixing length. Inside the lower part of the column, a sleeve is fixed in advance by welding at a factory or the like. A column is hung on the top of the concrete member, and the upper part of the deformed steel bar is inserted into the sleeve while the pillar is built on the concrete member. A grout material is injected into the sleeve of the pillar, and the upper part of the deformed steel bar is fixed to the sleeve. The column and the concrete member are joined and integrated by the sleeve inside the column, the deformed steel bar, and the grout material.

以上のような本発明の柱とコンクリート部材の接合構造によれば、(a) 基礎等に用いた場合、従来のベースプレートが不要となる、(b) 基礎等に用いた場合、地震時にアンカーボルトが引張力を受けたとき従来のようなアンカーボルトのナット下部のねじ部の伸び歪みの発生が無く、性能が劣化することがない、(c) 基礎等に用いた場合、異形棒鋼の外径とスリーブ内径のクリアランスが大きいため、従来のようにアンカーボルトをベースプレートのボルト孔に挿通するための厳しい精度管理が不要となる、(d) 基礎等に用いた場合、ベースプレートが無いため、隣地境界に接近して柱を建てることができ、敷地の有効利用が可能となる、(e) RCフレーム上にS造の柱を立設し易くなり、また接合部の固定度が確保でき、下部構造とラーメン構造を構成することができる、(f) 接合部の外側には何も無く、美麗であると共に、基礎等に用いた場合、足元に突出物がないため増打コンクリートが不要となる。   According to the joint structure of a pillar and a concrete member of the present invention as described above, (a) when used for a foundation, a conventional base plate is not required, and (b) when used for a foundation, an anchor bolt during an earthquake. When subjected to tensile force, there is no occurrence of elongation strain at the bottom of the nut of the anchor bolt and the performance does not deteriorate. (C) When used as a foundation, the outer diameter of the deformed steel bar Since the clearance between the sleeve and the inner diameter of the sleeve is large, there is no need for strict accuracy control for inserting the anchor bolt into the bolt hole of the base plate as in the conventional case. Columns can be built close to the building, enabling effective use of the site. (E) S columns can be easily erected on the RC frame. And ramen structure Can be constructed, (f) without any outside the joint, with a beautiful, when used in foundation or the like, is increasing droplet concrete since no projections at the foot becomes unnecessary.

請求項1及び2において、スリーブの柱内面への固着には溶接が用いられるが、欠陥の発生しやすいフレア溶接を避けるためには、スリーブの両側部に板状の突起を設け、この突起を裏当て材として突合せ溶接またはすみ肉溶接を行う。また、作業性が悪い場合には、柱側板にスリーブ長手方向のスリットを設けて溝溶接することもできる。   In Claims 1 and 2, welding is used to fix the sleeve to the inner surface of the column, but in order to avoid flare welding, which is likely to cause defects, plate-like protrusions are provided on both sides of the sleeve, and the protrusions are provided. Butt welding or fillet welding is performed as a backing material. Further, when workability is poor, it is possible to provide groove welding by providing a slit in the longitudinal direction of the sleeve on the column side plate.

本発明の閉鎖断面部材の接合構造は、以上のように構成されているので、次のような効果を有する。   Since the joint structure of the closed cross-section member of the present invention is configured as described above, it has the following effects.

(1) 柱と柱の接合あるいは柱とコンクリート部材の接合において、柱内部に固着したスリーブと異形棒鋼とグラウト材とを用いて接合するため、比較的簡易で低コストの接合構造により十分な接合強度が得られる。   (1) When joining columns and columns, or joining columns and concrete members, they are joined using a sleeve fixed to the inside of the column, deformed steel bar, and grout material. Strength is obtained.

(2) 予め工場等で柱内部にスリーブを固着しておき、現場では異形棒鋼をスリーブ内に挿入し、グラウト材で固定一体化するため、現場での接合作業が極めて容易となり、施工コストの低減が図られる。   (2) The sleeve is fixed inside the column in advance at the factory, and the deformed steel bar is inserted into the sleeve at the site and fixed and integrated with the grout material. Reduction is achieved.

(3) スリーブが柱内部に設けられているため、接合部の外側に突起物が何もなく、美麗であり、かつ、コンパクトな接合部が得られる。   (3) Since the sleeve is provided inside the column, there are no protrusions on the outside of the joint, and a beautiful and compact joint can be obtained.

(4) PC化した柱の場合、予め工場等で柱の端面までコンクリートを打設しておくことができ、従来のような現場でのコンクリート充填が不要となる。   (4) In the case of a PC column, concrete can be placed in advance up to the end face of the column at a factory or the like, so that it is not necessary to fill the concrete on-site as in the past.

以下、本発明を図示する実施形態に基づいて説明する。図1は本発明の閉鎖断面鉄骨柱と閉鎖断面鉄骨柱とを接合するための接合構造の一例を示したものである。図2は本発明の閉鎖断面鉄骨柱とコンクリート部材とを接合するための接合構造の一例を示したものである。図3は閉鎖断面鉄骨柱の例とスリーブ配置の例を示したものである。図4、図5は、2種類のスリーブ形状の例を示したものである。図6はスリーブの溶接の例を示したものである。   Hereinafter, the present invention will be described based on the illustrated embodiments. FIG. 1 shows an example of a joining structure for joining a closed section steel column and a closed section steel column of the present invention. FIG. 2 shows an example of a joining structure for joining the closed section steel column and the concrete member of the present invention. FIG. 3 shows an example of a closed section steel column and an example of sleeve arrangement. 4 and 5 show examples of two types of sleeve shapes. FIG. 6 shows an example of sleeve welding.

図1の実施形態において、本発明の接合構造は、閉鎖断面鉄骨である角形鋼管からなる上柱1と下柱2の接合端部における内側面にそれぞれ溶接で固着される柱軸方向に平行で柱周方向に間隔をおいて複数のスリーブ10と、丸鋼外面にふしが一体形成され、上下のスリーブ10に上部と下部がそれぞれ挿入される異形棒鋼11と、上下のスリーブ10の内部に充填される高強度モルタルやエポキシ樹脂系接着剤等からなるグラウト材12から構成されている。   In the embodiment of FIG. 1, the joint structure of the present invention is parallel to the direction of the column axis that is fixed by welding to the inner side surfaces at the joint ends of the upper column 1 and the lower column 2 made of a square steel pipe having a closed cross-section steel frame. A plurality of sleeves 10 spaced apart in the circumferential direction of the column, a deformed steel bar 11 in which a bar is integrally formed on the outer surface of the round steel, and an upper portion and a lower portion are respectively inserted into the upper and lower sleeves 10; It is comprised from the grout material 12 which consists of high-strength mortar, an epoxy resin adhesive, etc. which are made.

上下のスリーブ10は、横断面がU字状等のものでもよいが、横断面が円形リング状の円筒形スリーブが好ましい。また、この上下のスリーブ10は、上柱1と下柱2の内部に完全に収納し、外から見えないようにし、さらにスリーブ端面と柱端面とを面一とするのが好ましい。異形棒鋼11は、接合状態で連続した上下のスリーブ10の内部に完全に収納される長さとされている。   The upper and lower sleeves 10 may be U-shaped in cross section, but a cylindrical sleeve having a circular ring shape in cross section is preferable. Further, it is preferable that the upper and lower sleeves 10 are completely housed in the upper column 1 and the lower column 2 so that they cannot be seen from the outside, and the sleeve end surface and the column end surface are flush with each other. The deformed steel bar 11 has a length that is completely accommodated in the upper and lower sleeves 10 that are continuous in a joined state.

上柱1と下柱2は、円形鋼管、その他の閉鎖断面鉄骨柱でもよい。また、上柱1と下柱2は中空のままでもよいし、コンクリート13を充填してPC柱(コンクリート充填鋼管柱)としてもよい。スリーブ10は、底のある円筒形スリーブあるいは両端を漏れ止め部材で閉塞した円筒形スリーブとし、グラウト材が漏れ出ないようにし、PC柱の場合はコンクリートがスリーブ内に流入しないようにする。   The upper column 1 and the lower column 2 may be circular steel pipes or other closed section steel columns. Moreover, the upper pillar 1 and the lower pillar 2 may be left hollow, or may be filled with concrete 13 to be a PC pillar (concrete-filled steel pipe pillar). The sleeve 10 is a cylindrical sleeve with a bottom or a cylindrical sleeve closed at both ends with a leak-proofing member so that the grout material does not leak, and in the case of a PC column, concrete does not flow into the sleeve.

以上のような鉄骨柱と鉄骨柱の接合構造において、次のような手順で鉄骨柱と鉄骨柱の接合作業を行う(図1参照)。   In the joining structure of a steel column and a steel column as described above, the steel column and the steel column are joined in the following procedure (see FIG. 1).

(1) 図1(d) に示すように、上柱1の下部と下柱2の上部には、それぞれ上下のスリーブ10が予め工場等で溶接により固定されており、下スリーブ10に異形棒鋼11の下部を挿入し、この下スリーブ10内にグラウト材12を充填し、異形棒鋼11を固定しておく。PC柱の場合は、図1(e) に示すように、予め工場等でコンクリート13を上柱1及び下柱2の端面まで打設しておく。   (1) As shown in FIG. 1 (d), upper and lower sleeves 10 are fixed to a lower portion of the upper column 1 and an upper portion of the lower column 2 in advance by welding at a factory or the like, respectively. 11 is inserted, the lower sleeve 10 is filled with a grout material 12, and the deformed steel bar 11 is fixed. In the case of a PC pillar, as shown in FIG. 1 (e), concrete 13 is placed in advance to the end faces of the upper pillar 1 and the lower pillar 2 at a factory or the like.

(2) 下柱2の上に上柱1を吊り込み、異形棒鋼11の上部を上スリーブ10内に挿入しつつ下柱2上に上柱1を建て込む。   (2) The upper column 1 is suspended on the lower column 2, and the upper column 1 is built on the lower column 2 while the upper portion of the deformed steel bar 11 is inserted into the upper sleeve 10.

(3) 図1(a) に示すように、上スリーブ10及び上柱1には、スリーブ内と外部とを連通する注入口14と排出口15がそれぞれスリーブの下部位置と上部位置に設けられており、グラウト材12を注入口14から上スリーブ10内に注入し、排出口15から排出させてグラウト材12の充填を確認する。   (3) As shown in FIG. 1 (a), the upper sleeve 10 and the upper column 1 are provided with an inlet 14 and an outlet 15 for communicating the inside and outside of the sleeve at the lower position and the upper position of the sleeve, respectively. The grout material 12 is injected into the upper sleeve 10 from the inlet 14 and discharged from the outlet 15 to check the filling of the grout material 12.

ここで、PC柱の場合、上柱1と下柱2との当接面に若干の隙間を設け、その周辺をガムテープ等でシールして漏れ止めとし、その一部に形成した注入口からグラウト材12を注入すれば、グラウト材12が上スリーブ10だけではなく、当接面の隙間にも充填されるため、上柱1と下柱2とが確実に固定される。   Here, in the case of a PC column, a slight gap is provided on the contact surface between the upper column 1 and the lower column 2, the periphery thereof is sealed with gum tape or the like to prevent leakage, and a grout is formed from an injection port formed in a part thereof. When the material 12 is injected, the grout material 12 is filled not only in the upper sleeve 10 but also in the gap between the contact surfaces, so that the upper column 1 and the lower column 2 are securely fixed.

また、下柱のスリーブへのグラウト注入は、現場で上柱と同時に行うこともできる。この場合、例えば図1(f) に示すようなネオプレーン製の位置決めスペーサー19を用いて下スリーブ10内に異形棒鋼11を仮止めする。   In addition, the grout injection into the sleeve of the lower pillar can be performed at the same time as the upper pillar in the field. In this case, for example, the deformed steel bar 11 is temporarily fixed in the lower sleeve 10 using a neoprene positioning spacer 19 as shown in FIG.

次に、図2の実施形態において、本発明の接合構造は、角形鋼管からなる柱3の接合端部における内側面にそれぞれ溶接で固着される柱軸方向に平行で柱周方向に間隔をおいて複数のスリーブ10と、丸鋼外面にふしが一体形成され、下の基部が鉄筋コンクリート部材4内に埋設固定され、上の先端部がスリーブ10内に挿入される異形棒鋼11と、スリーブ10の内部に充填される高強度モルタルやエポキシ樹脂系接着剤等からなるグラウト材12から構成されている。   Next, in the embodiment of FIG. 2, the joining structure of the present invention is parallel to the column axis direction fixed to each inner side surface of the joining end portion of the column 3 made of a square steel pipe by welding and spaced in the column circumferential direction. A plurality of sleeves 10, a bar is integrally formed on the outer surface of the round steel, a lower base portion is embedded and fixed in the reinforced concrete member 4, and an upper end portion is inserted into the sleeve 10. It is composed of a grout material 12 made of a high-strength mortar or an epoxy resin adhesive filled inside.

柱3及びスリーブ10は、図1の上柱1及び上スリーブ10と同じである。柱3は円形鋼管、その他の閉鎖断面鉄骨柱でもよい。異形棒鋼11は、予め鉄筋コンクリート部材4内に埋設され、先端部が鉄筋コンクリート部材4の上面から所定のスリーブ定着長さ分だけ突出している。鉄筋コンクリート部材4内には鉄筋が配筋されている(図示省略) 。図示例の場合、異形棒鋼11の下端には定着金物16が設けられている。鉄筋コンクリート部材4が鉄筋コンクリート柱の場合には、その主筋が異形棒鋼11であり、この主筋を鉄筋コンクリート柱の上面から所定のスリーブ定着長さ分だけ突出させておけばよい。また、柱3がPC柱の場合のグラウト材の充填方法は、前述した図1のPC柱の充填方法に準ずる。   The pillar 3 and the sleeve 10 are the same as the upper pillar 1 and the upper sleeve 10 of FIG. The column 3 may be a circular steel pipe or other closed section steel column. The deformed steel bar 11 is embedded in the reinforced concrete member 4 in advance, and the tip protrudes from the upper surface of the reinforced concrete member 4 by a predetermined sleeve fixing length. Reinforcing bars are arranged in the reinforced concrete member 4 (not shown). In the illustrated example, a fixing hardware 16 is provided at the lower end of the deformed steel bar 11. When the reinforced concrete member 4 is a reinforced concrete column, the main reinforcing bar is a deformed steel bar 11, and the main reinforcing bar may be protruded from the upper surface of the reinforced concrete column by a predetermined sleeve fixing length. Further, the filling method of the grout material when the column 3 is a PC column is in accordance with the above-described PC column filling method of FIG.

この接合構造は、鉄筋コンクリートフレームから鉄骨フレームの鋼管柱を立設するときに適用できる。また、鉄筋コンクリート基礎との接合すなわち柱脚にも適用できる。柱脚等の場合、接合部は柱内部で行われるのでスマートであり、突出部がないので遮蔽するための増打コンクリートの必要がない。また、ベースプレートがないため、基礎の立上がりコンクリート部をコンパクトなものとすることができる。さらに、異形棒鋼11を立上がり主筋とし、これにフープ筋を結束線等で固定すれば、通常の鉄筋籠を外側に配置する場合と比べて鉄筋コンクリート部材4の平面視の形状を小さくすることができる。   This joint structure can be applied when standing a steel pipe column of a steel frame from a reinforced concrete frame. It can also be applied to joints with reinforced concrete foundations, ie column bases. In the case of a column base or the like, the joint is smart because it is performed inside the column, and there is no protrusion, so there is no need for additional concrete for shielding. Further, since there is no base plate, the rising concrete portion of the foundation can be made compact. Furthermore, if the deformed steel bar 11 is used as a rising main bar, and the hoop bar is fixed with a binding wire or the like, the shape of the reinforced concrete member 4 in plan view can be reduced as compared with a case where a normal reinforcing bar rod is disposed on the outside. .

以上のような鉄骨柱とコンクリート部材の接合構造において、次のような手順で鉄骨柱とコンクリート部材の接合作業を行う(図2参照)。   In the joining structure of a steel column and a concrete member as described above, the joining operation of the steel column and the concrete member is performed in the following procedure (see FIG. 2).

(1) 図2(c) に示すように、鉄筋コンクリート部材4内には異形棒鋼11が埋設されており、柱3の下部には、スリーブ10が予め工場等で溶接により固定されている。PC柱の場合は、図2(d) に示すように、予め工場等でコンクリート13を柱3の端面まで打設しておく。   (1) As shown in FIG.2 (c), the deformed steel bar 11 is embed | buried in the reinforced concrete member 4, and the sleeve 10 is previously fixed to the lower part of the pillar 3 by welding at the factory. In the case of a PC pillar, as shown in FIG. 2 (d), concrete 13 is placed in advance to the end face of the pillar 3 at a factory or the like.

(2) 鉄筋コンクリート部材4の上に柱3を吊り込み、異形棒鋼11の上部をスリーブ10内に挿入しつつ鉄筋コンクリート部材4上に柱3を建て込む。   (2) The column 3 is suspended on the reinforced concrete member 4 and the column 3 is built on the reinforced concrete member 4 while the upper portion of the deformed steel bar 11 is inserted into the sleeve 10.

(3) 異形棒鋼11の上部突出部はスリーブ10内に完全に収納されており、グラウト材12を注入口14からスリーブ10内に注入し、排出口15から排出させてグラウト材12の充填を確認する。PC柱の場合、図1と同様に、柱3と鉄筋コンクリート部材4との当接面に若干の隙間を設け、ガムテープ等でシールしてグラウトすれば、充填されるため、柱3と鉄筋コンクリート部材4とが確実に固定される。   (3) The upper protruding portion of the deformed steel bar 11 is completely stored in the sleeve 10, and the grout material 12 is injected into the sleeve 10 from the injection port 14 and discharged from the discharge port 15 to fill the grout material 12. Confirm. In the case of a PC column, as in FIG. 1, a slight gap is provided on the contact surface between the column 3 and the reinforced concrete member 4, and sealing is performed with gum tape or the like. And are securely fixed.

図3の(a) は円形鋼管に複数のスリーブを配置した例、(b) は角形鋼管に複数のスリーブを配置した例であり、スリーブ10の両側部を溶接で鋼管内面に固定する。この溶接は、後述するように鋼管内面に直接突合せ溶接するのが好ましい。また、作業性が悪い場合には、鋼管側板のスリーブ当接部分にスリーブ長手方向のスリットを設け、溝溶接(プラグ溶接やスロット溶接) などを用いることもできる。   3A is an example in which a plurality of sleeves are arranged on a circular steel pipe, and FIG. 3B is an example in which a plurality of sleeves are arranged on a square steel pipe, and both sides of the sleeve 10 are fixed to the inner surface of the steel pipe by welding. This welding is preferably butt welded directly to the inner surface of the steel pipe as will be described later. If workability is poor, a slit in the sleeve longitudinal direction can be provided in the sleeve contact portion of the steel pipe side plate, and groove welding (plug welding or slot welding) can be used.

スリーブ10は2種類用いることができる。図4に示すように、スリーブ10は内面に凹凸17のあるスリーブを用い、高強度モルタルまたはエポキシ樹脂系接着剤等のグラウト材12で異形棒鋼11と一体化する。スリーブ10内に異形棒鋼11を挿入し、スリーブ10の両端を図示しない漏れ止め部材で閉塞し、注入口14からスリーブ10内に注入し、排出口15から排出させる。このように内側に凹凸を有するスリーブに異形棒鋼を挿入しグラウトする場合、スリーブ内径と棒鋼外径のクリアランスが大きくても棒鋼の引張強さを十分に確保することができ、接合時の施工誤差の許容範囲が大きいという利点がある。   Two types of sleeves 10 can be used. As shown in FIG. 4, the sleeve 10 uses a sleeve having irregularities 17 on the inner surface, and is integrated with the deformed steel bar 11 with a grout material 12 such as high-strength mortar or epoxy resin adhesive. The deformed steel bar 11 is inserted into the sleeve 10, both ends of the sleeve 10 are closed with a leakage preventing member (not shown), injected into the sleeve 10 from the inlet 14, and discharged from the outlet 15. In this way, when a deformed steel bar is inserted into a sleeve with irregularities on the inner side and grouted, the tensile strength of the steel bar can be sufficiently secured even if the clearance between the sleeve inner diameter and the steel bar outer diameter is large, and construction errors during joining There is an advantage that the allowable range is large.

図5に示すように、エポキシ樹脂系接着剤を用いる場合には、スリーブ10は凹凸のないスリーブを用いることができ、スリーブ10の長さは棒鋼径の2.5倍以上とする。この場合、挿入精度は厳しくなるものの、スリーブ長は棒鋼直径の2.5倍以上あればよく、鋼管内への配置が容易となる。   As shown in FIG. 5, when an epoxy resin adhesive is used, the sleeve 10 can be a sleeve without irregularities, and the length of the sleeve 10 is 2.5 times or more the diameter of the steel bar. In this case, although the insertion accuracy becomes severe, the sleeve length only needs to be 2.5 times or more the diameter of the steel bar, and the arrangement in the steel pipe becomes easy.

図6は、欠陥が発生しやすいフレア溶接を避けるため、溶接性の良い鋳鋼品等のスリーブ10の側面にスリーブ長手方向に延在する突起18を設ける場合であり、この突起18を裏当てとして用いることにより、突合せ溶接やすみ肉溶接が可能となる。図6(a) は入隅部、図6(b) は平坦部の場合であり、開先角度が30〜45°の範囲となるように突起18を設けるのが好ましい。開先角度が30°程度でスリーブ径が比較的小さい場合には突合せ溶接とし、開先角度が45°程度でスリーブ径が比較的大きい場合にはすみ肉溶接が可能である。このような突起を設けることで、裏当て付きグルーブ溶接に準じた溶接を行うことができ、溶接欠陥のない健全な溶接部が得られる。   FIG. 6 shows a case in which a protrusion 18 extending in the longitudinal direction of the sleeve is provided on the side surface of the sleeve 10 such as a cast steel product having good weldability in order to avoid flare welding in which defects are likely to occur. By using it, butt welding and fillet welding can be performed. FIG. 6A shows the case of a corner and FIG. 6B shows the case of a flat part, and it is preferable to provide the protrusion 18 so that the groove angle is in the range of 30 to 45 °. Butt welding is possible when the groove angle is about 30 ° and the sleeve diameter is relatively small, and fillet welding is possible when the groove angle is about 45 ° and the sleeve diameter is relatively large. By providing such protrusions, welding according to the grooved welding with backing can be performed, and a sound welded portion having no welding defects can be obtained.

なお、本発明は以上のような図示例に限定されないことは言うまでもない。   Needless to say, the present invention is not limited to the illustrated examples.

本発明の閉鎖断面鉄骨柱と閉鎖断面鉄骨柱とを接合するための接合構造の一実施形態であり、(a) は接合後の正面図、(b) は柱が角形鋼管の場合の水平断面図、(c) は柱が円形鋼管の場合の水平断面図、(d) は接合前の鉛直断面図、(e) はPC柱の接合前の鉛直断面図、(f) は位置決めスペーサーの斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an embodiment of a joining structure for joining a closed section steel column and a closed section steel column of the present invention, (a) is a front view after joining, and (b) is a horizontal section when the column is a square steel pipe. Figure, (c) is a horizontal sectional view when the column is a circular steel pipe, (d) is a vertical sectional view before joining, (e) is a vertical sectional view before joining the PC column, and (f) is a perspective view of the positioning spacer. FIG. 本発明の閉鎖断面鉄骨柱とコンクリート部材とを接合するための接合構造の一実施形態であり、(a) は接合後の正面図、(b) は水平断面図、(c) は接合前の鉛直断面図、(d) はPC柱の接合前の鉛直断面図である。BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an embodiment of a joining structure for joining a closed cross-section steel column and a concrete member of the present invention, (a) is a front view after joining, (b) is a horizontal sectional view, and (c) is before joining. Vertical sectional view, (d) is a vertical sectional view before joining the PC columns. 本発明の閉鎖断面鉄骨柱の例とスリーブの配置の例を示す水平断面図である。It is a horizontal sectional view which shows the example of the closed cross-section steel column of this invention, and the example of arrangement | positioning of a sleeve. 本発明で用いるスリーブ形状の一例を示す異形棒鋼の正面図・側面図とスリーブの断面図である。It is the front view and side view of a deformed steel bar showing an example of the sleeve shape used in the present invention, and a sectional view of the sleeve. 本発明で用いるスリーブ形状の他の例を示す断面図である。It is sectional drawing which shows the other example of the sleeve shape used by this invention. 本発明で用いるスリーブの溶接の例を示す断面図である。It is sectional drawing which shows the example of welding of the sleeve used by this invention. 従来の柱と柱の接合構造を工程順に示す正面図と断面図である。It is the front view and sectional drawing which show the joining structure of the conventional pillar and the pillar in order of a process. 従来の柱脚構造を示す(a) は鉛直断面図、(b) は水平断面図である。(A) shows a conventional column base structure, and (b) is a horizontal sectional view.

符号の説明Explanation of symbols

1……上柱
2……下柱
3……柱
4……鉄筋コンクリート部材
10……スリーブ
11……異形棒鋼
12……グラウト材
13……コンクリート
14……注入口
15……排出口
16……定着金物
17……凹凸
18……突起
19……位置決めスペーサー
DESCRIPTION OF SYMBOLS 1 ... Upper pillar 2 ... Lower pillar 3 ... Pillar 4 ... Reinforced concrete member 10 ... Sleeve 11 ... Deformed bar 12 ... Grout material 13 ... Concrete 14 ... Injection port 15 ... Discharge port 16 ... Fixing hardware 17 ... uneven 18 ... projection 19 ... positioning spacer

Claims (2)

閉鎖断面鉄骨柱と閉鎖断面鉄骨柱とを接合するための接合構造であり、上下の閉鎖断面鉄骨柱のそれぞれの接合端部における内側面に、柱軸方向に平行なスリーブが柱周方向に間隔をおいて複数固着され、上下の閉鎖断面鉄骨柱の上下のスリーブ内にそれぞれ異形棒鋼の上部と下部が挿入され、前記上下のスリーブ内にグラウト材が充填されていることを特徴とする閉鎖断面部材の接合構造。   This is a joint structure for joining a closed cross-section steel column and a closed cross-section steel column. Sleeves parallel to the column axial direction are spaced in the column circumferential direction on the inner surface of each joint end of the upper and lower closed cross-section steel columns. A closed cross section characterized in that the upper and lower portions of deformed steel bars are respectively inserted into the upper and lower sleeves of the upper and lower closed cross-section steel columns, and the upper and lower sleeves are filled with grout material. Joining structure of members. 閉鎖断面鉄骨柱をコンクリート部材に接合するための接合構造であり、閉鎖断面鉄骨柱の接合端部における内側面に、柱軸方向に平行なスリーブが柱周方向に間隔をおいて複数固着され、コンクリート部材内に基部が埋設固定された異形棒鋼の先端部が前記スリーブ内に挿入され、このスリーブ内にグラウト材が充填されていることを特徴とする閉鎖断面部材の接合構造。
It is a joint structure for joining a closed cross-section steel column to a concrete member, and a plurality of sleeves parallel to the column axis direction are fixed to the inner side surface at the joint end of the closed cross-section steel column at intervals in the column circumferential direction, A closed cross-section member joining structure, wherein a tip end portion of a deformed steel bar whose base portion is embedded and fixed in a concrete member is inserted into the sleeve, and a grout material is filled in the sleeve.
JP2004010121A 2004-01-19 2004-01-19 Joining structure of closed cross-sectional member Pending JP2005200994A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2010219374B1 (en) * 2010-09-10 2011-05-19 O'Halloran, Michael Mr A Method of Supporting a Building or Other Structure
JP2012177292A (en) * 2011-01-31 2012-09-13 Taisei Corp Building structure
JP2013112972A (en) * 2011-11-28 2013-06-10 Taisei Corp Building structure
JP2013112973A (en) * 2011-11-28 2013-06-10 Taisei Corp Building structure
JP2016205054A (en) * 2015-04-27 2016-12-08 株式会社安藤・間 Steel reinforced concrete column and building using the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2010219374B1 (en) * 2010-09-10 2011-05-19 O'Halloran, Michael Mr A Method of Supporting a Building or Other Structure
JP2012177292A (en) * 2011-01-31 2012-09-13 Taisei Corp Building structure
JP2013112972A (en) * 2011-11-28 2013-06-10 Taisei Corp Building structure
JP2013112973A (en) * 2011-11-28 2013-06-10 Taisei Corp Building structure
JP2016205054A (en) * 2015-04-27 2016-12-08 株式会社安藤・間 Steel reinforced concrete column and building using the same

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