JP2017115500A - Column joint structure - Google Patents

Column joint structure Download PDF

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JP2017115500A
JP2017115500A JP2015254019A JP2015254019A JP2017115500A JP 2017115500 A JP2017115500 A JP 2017115500A JP 2015254019 A JP2015254019 A JP 2015254019A JP 2015254019 A JP2015254019 A JP 2015254019A JP 2017115500 A JP2017115500 A JP 2017115500A
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column
pillar
taper member
cross
taper
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JP6688069B2 (en
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桂太 田原
Keita Tahara
桂太 田原
西村　章
Akira Nishimura
章 西村
陽二郎 門司
Yojiro Moji
陽二郎 門司
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Takenaka Komuten Co Ltd
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Takenaka Komuten Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a column joint structure capable of efficiently transferring a load from an upper column side to a lower column.SOLUTION: In a column joint structure for joining lower and upper columns 1 and 2 different in cross-sectional size, a taper member 5 for joining outer peripheral parts of the upper and lower columns 2 and 1 is provided, and an internal-side transfer member 8 is arranged within the taper member 5.SELECTED DRAWING: Figure 1

Description

本発明は、横断面での大きさが異なる下柱と上柱とを接合する柱の接合構造に関する。   The present invention relates to a column joining structure that joins a lower column and an upper column having different cross-sectional sizes.

このような横断面での大きさが異なる上下の柱どうしを接合する場合、従来、上柱と下柱の外周部を接合する特殊な部材、具体的には、鋼板製の中空角錐台形状や中空円錐台形状に形成した中空のテーパー部材を使用し、その中空のテーパー部材を介在して上柱と下柱を接合する構造が知られている（例えば、特許文献１参照）。   When joining upper and lower pillars having different cross-sectional sizes, conventionally, a special member that joins the outer peripheries of the upper and lower pillars, specifically, a hollow pyramid shape made of steel A structure is known in which a hollow tapered member formed in a hollow truncated cone shape is used, and an upper column and a lower column are joined via the hollow tapered member (see, for example, Patent Document 1).

実公平７−５１５２４号公報（特に、第１５図参照）Japanese Utility Model Publication No. 7-51524 (refer to FIG. 15 in particular)

しかしながら、上記特許文献に記載の従来技術では、上下の柱を接合するためのテーパー部材が、鋼板により構成された完全な中空構造であるため、上柱側からの全荷重が、テーパー部材を介して下柱の外周部に集中的に伝達されることになる。
そのため、下柱の外周部に応力が集中し、上柱側からの荷重を下柱へ効率よく伝達することができないという問題があった。 However, in the prior art described in the above-mentioned patent document, since the taper member for joining the upper and lower columns is a complete hollow structure made of steel plates, the total load from the upper column side is passed through the taper member. Thus, it is transmitted intensively to the outer periphery of the lower pillar.
For this reason, there is a problem that stress concentrates on the outer peripheral portion of the lower column and the load from the upper column cannot be efficiently transmitted to the lower column.

本発明は、このような従来の問題点に着目したもので、その目的は、上柱側からの荷重を下柱へ効率よく伝達することが可能な柱の接合構造を提供することにある。   The present invention pays attention to such a conventional problem, and an object thereof is to provide a column connecting structure capable of efficiently transmitting a load from the upper column side to the lower column.

本発明の第１特徴構成は、横断面での大きさが異なる下柱と上柱とを接合する柱の接合構造であって、
前記上柱と前記下柱の外周部を接合するテーパー部材を備え、そのテーパー部材の内部には、内部側伝達部材が配設されている点にある。 A first characteristic configuration of the present invention is a joining structure of a pillar that joins a lower pillar and an upper pillar having different sizes in a cross section,
The taper member which joins the outer peripheral part of the said upper pillar and the said lower pillar is provided, and it exists in the point by which the internal side transmission member is arrange | positioned inside the taper member.

上記構成によれば、上柱と下柱の外周部を接合するテーパー部材を備えているので、上柱側からの荷重は、テーパー部材を介して下柱の外周部に伝達される。それに加えて、テーパー部材の内部に内部側伝達部材が配設されているので、上柱側からの荷重は、その内部側伝達部材を介して下柱の内部側にも伝達される。
すなわち、上柱側からの荷重は、下柱の外周部のみならず内部側にも伝達されることになり、下柱の一部に応力が集中するのを回避して、上柱側からの荷重を下柱へ効率よく伝達することができる。 According to the above configuration, since the taper member that joins the outer periphery of the upper column and the lower column is provided, the load from the upper column side is transmitted to the outer periphery of the lower column via the taper member. In addition, since the internal transmission member is disposed inside the taper member, the load from the upper column side is also transmitted to the internal side of the lower column via the internal transmission member.
In other words, the load from the upper column side is transmitted not only to the outer peripheral part of the lower column but also to the inner side, avoiding stress concentration on a part of the lower column, The load can be efficiently transmitted to the lower column.

本発明の第２特徴構成は、前記内部側伝達部材は、前記テーパー部材の対向する内壁部に亘って配設されている点にある。   According to a second characteristic configuration of the present invention, the inner transmission member is disposed across the opposing inner wall portions of the taper member.

上記構成によれば、内部側伝達部材がテーパー部材の対向する内壁部に亘って配設されているので、この内部側伝達部材が、テーパー部材の補強機能を有するとともに、上柱側からの荷重を下柱の内部側へ一層確実に伝達することができる。   According to the above configuration, since the internal transmission member is disposed over the opposing inner wall portions of the taper member, the internal transmission member has a function of reinforcing the taper member and has a load from the upper column side. Can be more reliably transmitted to the inner side of the lower pillar.

本発明の第３特徴構成は、前記テーパー部材の内部には、硬化性充填材が充填され、前記下柱の外周と前記テーパー部材の外周とに亘って鉄筋コンクリートが配設されている点にある。   A third characteristic configuration of the present invention is that the inside of the tapered member is filled with a curable filler, and reinforced concrete is disposed across the outer periphery of the lower column and the outer periphery of the tapered member. .

上記構成によれば、テーパー部材の内部に硬化性充填材が充填されているので、上柱側からの荷重は、この硬化性充填材をも介して下柱側へ伝達され、更に、下柱の外周とテーパー部材の外周とに亘って鉄筋コンクリートが配設されているので、上柱側からの荷重は、この鉄筋コンクリートをも介して下柱側へ伝達される。
このように、上柱側からの荷重は、上述したテーパー部材や内部側伝達部材のみならず、硬化性充填材や鉄筋コンクリートによっても下柱側へ伝達されるので、上柱側からの荷重を下柱側へきわめて効率よく伝達することが可能となる。 According to the above configuration, since the inside of the taper member is filled with the curable filler, the load from the upper column side is transmitted to the lower column side through the curable filler, and further, the lower column Since the reinforced concrete is disposed over the outer periphery of the taper member and the outer periphery of the tapered member, the load from the upper column side is transmitted to the lower column side also through the reinforced concrete.
Thus, the load from the upper column side is transmitted to the lower column side not only by the taper member and the internal transmission member described above, but also by the curable filler and reinforced concrete. It becomes possible to transmit to the pillar side very efficiently.

柱の接合構造を示す縦断正面図Longitudinal front view showing the column structure 柱の接合構造を示す分解斜視図Exploded perspective view showing the column connection structure 柱の接合手順を示す縦断正面図Longitudinal front view showing the column joining procedure 柱の接合手順を示す縦断正面図Longitudinal front view showing the column joining procedure 柱の接合手順を示す縦断正面図Longitudinal front view showing the column joining procedure

本発明による柱の接合構造の実施形態を図面に基づいて説明する。
本発明は、例えば、既存の建造物において、各柱の下方部分を残して上方部分を切断して除去し、図１及び図５に示すように、残存する既存の下柱１上に、その下柱１の横断面より小さな横断面を有する新たな上柱２を接合し、既存の下柱１上に新たな建造物を構築する場合などに適用される。
この実施形態では、図１及び図２に示すように、下柱１が、横断面視において、一辺の長さをＬ１とし中心部にクロスＨ型鋼３を備え、周囲に多数の鉄筋４を備えたほぼ正方形の中実の鉄骨鉄筋コンクリート造（ＳＲＣ造）の柱である。上柱２は、横断面視において、一辺の長さをＬ２とし下柱１の横断面の面積より小さな面積を有するほぼ正方形の鋼管からなる鉄骨造（Ｓ造）の柱である。そして、この下柱１と上柱２とが、両柱１、２の外周部を接合するテーパー部材５を介在し、必要に応じて鋼板製の下板６と上板７を介在させた状態で接合される。 An embodiment of a column joining structure according to the present invention will be described based on the drawings.
The present invention, for example, in an existing building, cuts and removes the upper part leaving the lower part of each pillar, and on the remaining existing lower pillar 1 as shown in FIGS. This is applied to a case where a new upper pillar 2 having a smaller cross section than that of the lower pillar 1 is joined and a new building is constructed on the existing lower pillar 1.
In this embodiment, as shown in FIG. 1 and FIG. 2, the lower pillar 1 is provided with a cross H-shaped steel 3 at the center with a length of one side L1 in the cross-sectional view, and a number of reinforcing bars 4 around it. It is a solid square steel reinforced concrete (SRC) pillar. The upper pillar 2 is a steel-framed (S-structured) pillar made of a substantially square steel pipe having a side length L2 and a smaller area than the transverse section of the lower pillar 1 in a cross-sectional view. And this lower pillar 1 and upper pillar 2 interpose the taper member 5 which joins the outer peripheral part of both pillars 1 and 2, and the state which made the steel plate lower board 6 and upper board 7 intervene as needed Are joined together.

テーパー部材５は、図２に示すように、その形状が下方ほど大きく、上方ほど小さなテーパー状の中空体、つまり、中空の四角錐台形状で、例えば、鋼材などで形成される。テーパー部材５の下柱１側の端面５ａは、下柱１のクロスＨ型鋼３の横幅方向の長さＬ３と一致する一辺長さＬ３を有する正方形に形成されて、クロスＨ型鋼３のフランジ３ａ上に配置可能に構成され、上柱２側の端面５ｂは、上柱２の一辺長さＬ２とほぼ一致する一辺長さＬ２を有する正方形に形成される。
このテーパー部材５の内部には、上柱２側からの荷重を下柱１側へ伝達するための内部側伝達部材８が、例えば、鋼材などで形成されて配設されている。この内部側伝達部材８は、下柱１のクロスＨ型鋼３のウェブ３ｂ上に配置可能なように、横断面視でウェブ３ｂとほぼ同一形状の十字状に形成されるとともに、図４から明確なように、正面視において、その上端がテーパー部材５の上柱２側の端面５ｂより下方に位置するように形成され、互いに対向するテーパー部材５の内壁部に亘って、かつ、互いに対向する内壁部に溶接されて配設されている。 As shown in FIG. 2, the tapered member 5 has a tapered hollow body whose shape is larger toward the lower side and smaller toward the upper side, that is, a hollow quadrangular frustum shape, and is formed of, for example, a steel material. The end face 5a on the lower pillar 1 side of the taper member 5 is formed in a square having a side length L3 that coincides with the length L3 of the cross H-shaped steel 3 of the lower pillar 1 and the flange 3a of the cross H-shaped steel 3 The upper pillar 2 side end face 5b is formed in a square shape having a side length L2 that substantially matches the side length L2 of the upper pillar 2.
Inside the taper member 5, an inner side transmission member 8 for transmitting a load from the upper column 2 side to the lower column 1 side is formed, for example, by a steel material. The internal transmission member 8 is formed in a cross shape having substantially the same shape as the web 3b in a cross-sectional view so that the inner transmission member 8 can be disposed on the web 3b of the cross H-shaped steel 3 of the lower pillar 1 and clearly shown in FIG. As seen from the front, the upper end of the tapered member 5 is formed so as to be located below the end surface 5b on the upper pillar 2 side, over the inner wall portions of the tapered members 5 facing each other, and opposed to each other. It is welded to the inner wall.

次に、この柱の接合構造についての施工手順を説明するが、あくまでも基本的な施工手順であり、したがって、実際の実施に際して手順が相前後することはあり得る。
まず、図３に示すように、所定のフロアラインＦＬ（図１参照）から上方に立設された既存の柱において、必要な下方部分を残して上方部分（図３において仮想線で示す）を切断除去し、残った下方部分を下柱１として、その下柱１の上方部分のコンクリートを必要な量だけ剥離除去し、クロスＨ型鋼３と鉄筋４の一部を露出させ、必要な場合には、鉄筋４の上方部分を切断除去する。
次に、図４に示すように、下柱１の上面（実際には、クロスＨ型鋼３の上端面）の上に下板６を載置し、その下板６とクロスＨ型鋼３とを溶接して接合し、下板６の上にテーパー部材５を載置する。テーパー部材５の載置に際しては、テーパー部材５の下柱１側の端面５ａが、クロスＨ型鋼３のフランジ３ａ上に位置し、内部側伝達部材８が、クロスＨ型鋼３のウェブ３ｂ上に位置するように載置して、テーパー部材５と下板６とを溶接して接合する。 Next, although the construction procedure about this column joining structure will be described, it is a basic construction procedure to the last, and therefore, the procedure may be mixed in the actual implementation.
First, as shown in FIG. 3, in an existing pillar standing upward from a predetermined floor line FL (see FIG. 1), an upper portion (indicated by a virtual line in FIG. 3) is left, leaving a necessary lower portion. Cut and remove the remaining lower part as the lower pillar 1 and peel off and remove the necessary amount of concrete in the upper part of the lower pillar 1 to expose a part of the cross H-shaped steel 3 and the reinforcing bar 4 when necessary. Cuts and removes the upper part of the reinforcing bar 4.
Next, as shown in FIG. 4, the lower plate 6 is placed on the upper surface of the lower pillar 1 (in practice, the upper end surface of the cross H-shaped steel 3), and the lower plate 6 and the cross H-shaped steel 3 are attached to each other. The taper member 5 is placed on the lower plate 6 by welding and joining. When the taper member 5 is placed, the end face 5a on the lower pillar 1 side of the taper member 5 is positioned on the flange 3a of the cross H-shaped steel 3, and the internal transmission member 8 is placed on the web 3b of the cross H-shaped steel 3. It mounts so that it may be located, and the taper member 5 and the lower board 6 are welded and joined.

その後、図５に示すように、テーパー部材５内に硬化性充填材の一例である無収縮モルタル９を充填し、テーパー部材５の上柱２側の端面５ｂの上に上板７を載置し、テーパー部材５と上板７とを溶接して接合する。この無収縮モルタル９の充填に際しては、テーパー部材５の内部空間が、十字状の内部側伝達部材８によって複数の空間に区画されているが、内部側伝達部材８の上端が、テーパー部材５の上柱２側の端面５ｂより下方に位置しているので、区画された複数の空間内に無収縮モルタル９を万遍なく容易に充填することができる。
次に、上柱２がテーパー部材５の上柱２側の端面５ｂ上に位置するように、上柱２を上板７の上に載置し、上板７と上柱２を溶接して接合する。そして、図１に示すように、下柱１の鉄筋４の上方に新たな鉄筋１０を接続するとともに、新たな鉄筋１０を配筋し、テーパー部材５が完全に隠れるように、下柱１の上方部分のコンクリート除去部分を含めて上板７の上方までコンクリートを打設し、下柱１の外周とテーパー部材５の外周とに亘って鉄筋コンクリートを配設した状態で接合を完了する。 Thereafter, as shown in FIG. 5, the taper member 5 is filled with non-shrink mortar 9 which is an example of a curable filler, and the upper plate 7 is placed on the end surface 5 b on the upper column 2 side of the taper member 5. Then, the taper member 5 and the upper plate 7 are welded and joined. When filling the non-shrink mortar 9, the internal space of the taper member 5 is partitioned into a plurality of spaces by the cross-shaped internal transmission member 8. The upper end of the internal transmission member 8 is Since it is located below the end face 5b on the upper pillar 2 side, the non-shrinkable mortar 9 can be easily and uniformly filled into the partitioned spaces.
Next, the upper column 2 is placed on the upper plate 7 so that the upper column 2 is positioned on the end surface 5b on the upper column 2 side of the taper member 5, and the upper plate 7 and the upper column 2 are welded. Join. And as shown in FIG. 1, while connecting the new reinforcing bar 10 above the reinforcing bar 4 of the lower pillar 1 and arranging the new reinforcing bar 10, the taper member 5 is completely hidden so that the taper member 5 is completely hidden. The concrete is cast up to the upper portion of the upper plate 7 including the concrete removed portion of the upper portion, and the joining is completed in a state where the reinforced concrete is disposed over the outer periphery of the lower column 1 and the outer periphery of the tapered member 5.

〔別実施形態〕
（１）先の実施形態では、下柱１としてクロスＨ型鋼３からなる鉄骨を備えたＳＲＣ造の柱を示したが、クロスＨ型鋼３以外にも、例えば、Ｈ型鋼、溝型鋼、山形鋼等の各種の型鋼やラチスで補強したものなど、各種形状の鉄骨を備えたＳＲＣ造の柱にも適用可能である。更に、ＳＲＣ造の柱以外にも、例えば、鉄筋コンクリート造（ＲＣ造）の柱やコンクリート充填鋼管構造（ＣＦＴ造）の柱などにも適用可能である。
同様に、上柱２に関しても、先の実施形態で示したＳ造の柱に限るものではなく、ＲＣ造、ＳＲＣ造、ＣＦＴ造の柱などでも適用可能である。 [Another embodiment]
(1) In the previous embodiment, an SRC column having a steel frame made of a cross H-shaped steel 3 was shown as the lower column 1, but other than the cross H-shaped steel 3, for example, an H-shaped steel, a grooved steel, and an angle steel The present invention can also be applied to SRC columns having various shapes of steel such as various steel shapes and reinforced with lattices. Further, in addition to the SRC column, for example, a reinforced concrete column (RC) column or a concrete-filled steel pipe structure (CFT column) can be applied.
Similarly, the upper column 2 is not limited to the S column shown in the previous embodiment, but can be applied to an RC column, an SRC column, a CFT column, or the like.

（２）先の実施形態では、テーパー部材５として四角錐台形状のものを示したが、テーパー部材５の形状は、下柱１と上柱２の横断面形状によって適宜変更される。例えば、両柱１、２の横断面形状が共に円形であれば、円錐台形状となり、下柱１が円形で上柱２が四角であれば、下柱１側の端面５ａが円形で上柱２側の端面５ｂが四角、逆の場合には、下柱１側の端面５ａが四角で上柱２側の端面５ｂが円形の錐台形状となる。
テーパー部材５に配設する内部側伝達部材８に関しては、先の実施形態のように、テーパー部材５の対向する内壁部に亘って配設するのが好ましいが、内壁部から中心部に向かって突出する状態で配設することも可能である。 (2) In the previous embodiment, the tapered member 5 has a quadrangular pyramid shape, but the shape of the tapered member 5 is appropriately changed depending on the cross-sectional shapes of the lower pillar 1 and the upper pillar 2. For example, if both the cross-sectional shapes of both pillars 1 and 2 are circular, it becomes a truncated cone shape, and if the lower pillar 1 is circular and the upper pillar 2 is square, the end face 5a on the lower pillar 1 side is circular and the upper pillar When the end surface 5b on the 2 side is a square and the other way around, the end surface 5a on the lower column 1 side is a square and the end surface 5b on the upper column 2 side is a circular frustum shape.
The inner transmission member 8 disposed on the taper member 5 is preferably disposed over the opposing inner wall portions of the taper member 5 as in the previous embodiment, but from the inner wall portion toward the center portion. It is also possible to arrange in a protruding state.

（３）先の実施形態では、下柱１とテーパー部材５との間に下板６を介在させ、テーパー部材５と上柱２との間に上板７を介在させた例を示したが、例えば、テーパー部材５を有底にすることで下板６をなくすことができ、また、テーパー部材５の上柱２側の端面５ｂに上柱２を直接接合することもできるので、これら下板６と上板７については必要不可欠なものではない。 (3) In the previous embodiment, an example in which the lower plate 6 is interposed between the lower column 1 and the taper member 5 and the upper plate 7 is interposed between the taper member 5 and the upper column 2 has been described. For example, the lower plate 6 can be eliminated by making the taper member 5 bottomed, and the upper column 2 can be directly joined to the end surface 5b on the upper column 2 side of the taper member 5; The plate 6 and the upper plate 7 are not indispensable.

１ 下柱
２ 上柱
５ テーパー部材
８ 内部側伝達部材
９ 硬化性充填材


1 Lower pillar 2 Upper pillar 5 Tapered member 8 Internal transmission member 9 Curable filler


Claims (3)

横断面での大きさが異なる下柱と上柱とを接合する柱の接合構造であって、
前記上柱と前記下柱の外周部を接合するテーパー部材を備え、そのテーパー部材の内部には、内部側伝達部材が配設されている柱の接合構造。 A column joining structure that joins a lower column and an upper column having different cross-sectional sizes,
A column joining structure comprising a taper member that joins the outer peripheries of the upper column and the lower column, and an internal transmission member is disposed inside the taper member. 前記内部側伝達部材は、前記テーパー部材の対向する内壁部に亘って配設されている請求項１に記載の柱の接合構造。   2. The column joining structure according to claim 1, wherein the inner transmission member is disposed across opposing inner wall portions of the taper member. 前記テーパー部材の内部には、硬化性充填材が充填され、前記下柱の外周と前記テーパー部材の外周とに亘って鉄筋コンクリートが配設されている請求項１または２に記載の柱の接合構造。


The column joining structure according to claim 1 or 2, wherein the taper member is filled with a curable filler, and reinforced concrete is disposed over the outer periphery of the lower column and the outer periphery of the taper member. .


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