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JP2008121240A - Reinforcement structure of existing steel structural members - Google Patents

Reinforcement structure of existing steel structural members Download PDF

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JP2008121240A
JP2008121240A JP2006304886A JP2006304886A JP2008121240A JP 2008121240 A JP2008121240 A JP 2008121240A JP 2006304886 A JP2006304886 A JP 2006304886A JP 2006304886 A JP2006304886 A JP 2006304886A JP 2008121240 A JP2008121240 A JP 2008121240A
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existing
lattice
reinforcing
triangular
longitudinal direction
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JP4895284B2 (en
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Daisuke Katsura
大輔 桂
Shigeo Akiyama
茂雄 秋山
Takashi Miyama
剛史 三山
Satoshi Sasaki
聡 佐々木
Takashi Asano
孝 浅野
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Fujita Corp
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Fujita Corp
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Abstract

【課題】既存鋼構造物を構成している既存鋼構造部材を補強するに際し、有資格者による作業を減少して人員配置を迅速に行なえ、工期の短縮化、施工コストの低減化を図る上で有利な新規な補強構造を提供すること。
【解決手段】 ラチス柱１２を補強するに際して複数の補強用ラチス材２０が設けられる。補強用ラチス材２０の長手方向の両端にはスペーサ２２が取り付けられている。ラチス柱１２を補強するには、補強用ラチス材２０の長手方向の中央を各既存ラチス材１６の長手方向の中央に当て付け、鉛直方向に対して斜めで既存ラチス材１６と逆向きに補強用ラチス材２０を一対の既存弦材１４間に掛け渡し、その長手方向の両端のスペーサ２２を一対の既存弦材１４のフランジ１４０２にそれぞれ当て付け、ドリルねじＤまたは打ち込み鋲Ｂにより取り付ける。
【選択図】図２[PROBLEMS] To reinforce existing steel structural members that make up an existing steel structure, to reduce work by qualified personnel and to quickly allocate personnel, to shorten the construction period and to reduce construction costs. And providing a new reinforcing structure which is advantageous.
A plurality of reinforcing lattice members 20 are provided when reinforcing a lattice pillar 12. Spacers 22 are attached to both ends of the reinforcing lattice 20 in the longitudinal direction. In order to reinforce the lattice pillar 12, the center in the longitudinal direction of the reinforcing lattice material 20 is applied to the center in the longitudinal direction of each existing lattice material 16, and is reinforced diagonally with respect to the vertical direction and opposite to the existing lattice material 16. The lattice material 20 for use is spanned between a pair of existing string members 14, and the spacers 22 at both ends in the longitudinal direction are respectively applied to the flanges 1402 of the pair of existing string members 14, and attached with a drill screw D or a driving rod B.
[Selection] Figure 2

Description

本発明は既存鋼構造物を構成している既存鋼構造部材の補強構造に関する。   The present invention relates to a reinforcing structure for an existing steel structural member constituting an existing steel structure.

既存鋼構造物を構成するラチス柱やラチス梁などの既存鋼構造部材に補強を施すことが必要とされるのは、例えば、経年変化により強度が低下した既存鋼構造物に補強を施す場合や、耐震性能が不十分な既存鋼構造物に耐震補強を施す場合などである。また、補強が必要になる鋼構造物には、鉄骨造建物の骨組をはじめとする様々な鋼製の支持構造体などがある。
既存鋼構造物を構成している既存鋼構造部材を補強する場合、補強用鋼材を既存鋼構造部材に溶接により接合する技術は既に知られている（特許文献１）。
補強用鋼材を既存鋼構造部材に溶接により接合する場合、補強用鋼材の位置合わせをして仮付け溶接を行い、次に、本溶接が行なわれる。
しかしながら、溶接作業では仮付け溶接から本溶接までの間溶接養生が必要とされ、また溶接作業は高度の技能を有する有資格者しかできないため、施工コスト及び人員配置の手間がかかり、工期の短縮化を図る上で不利があった。
特開平８−２７６８８９ It is necessary to reinforce existing steel structural members such as lattice columns and lattice beams that make up existing steel structures, for example, when reinforcing existing steel structures whose strength has decreased due to secular change, This is the case when seismic reinforcement is applied to existing steel structures with insufficient seismic performance. In addition, steel structures that require reinforcement include various steel support structures such as the frameworks of steel buildings.
When reinforcing the existing steel structure member which comprises the existing steel structure, the technique which joins the steel material for reinforcement to the existing steel structure member by welding is already known (patent document 1).
When joining a reinforcing steel material to an existing steel structural member by welding, the reinforcing steel material is aligned and then tack welding is performed, and then main welding is performed.
However, welding work requires welding curing from tack welding to main welding, and welding work can only be performed by qualified personnel with a high level of skill. There was a disadvantage in making it easier.
JP-A-8-276889

本発明は、このような事情に鑑み成されたものであり、本発明の目的は、既存鋼構造物を構成している既存鋼構造部材を補強するに際し、有資格者による作業を減少して人員配置を迅速に行なえ、工期の短縮化、施工コストの低減化を図る上で有利な新規な補強構造を提供することにある。   The present invention has been made in view of such circumstances, and the object of the present invention is to reduce the work by qualified personnel when reinforcing an existing steel structure member constituting an existing steel structure. It is to provide a new reinforcing structure that is advantageous in that personnel can be arranged quickly, shortening the construction period and reducing the construction cost.

前記目的を達成するため本発明は、互いに対向して延在する一対の既存弦材と、それら既存弦材間にそれら既存弦材が延在する方向に対して斜めに掛け渡された複数の既存ラチス材とを有する既存鋼構造部材を補強する構造であって、前記既存ラチス材と同じ長さの複数の補強用ラチス材が設けられ、前記補強用ラチス材の長手方向の両端に、前記既存ラチス材と同じ厚さのスペーサが取り付けられ、前記補強用ラチス材の長手方向の中央が前記各既存ラチス材の長手方向の中央に当て付けられ前記既存弦材の延在方向に対して斜めで前記既存ラチス材と逆向きに前記補強用ラチス材が前記一対の弦材間に掛け渡わたされてその長手方向の両端のスペーサが前記一対の既存弦材にそれぞれ当て付けられ、前記補強用ラチス材の両端は前記スペーサと共に、ドリルねじまたは打ち込み鋲により前記一対の既存弦材に取り付けられ、前記補強用ラチス材の長手方向の中央は、ドリルねじまたは打ち込み鋲により前記既存ラチス材の長手方向の中央に取り付けられていることを特徴とする。
また、本発明は、互いに対向して延在する一対の既存弦材と、それら既存弦材間にそれら既存弦材が延在する方向に対して斜めに掛け渡された複数の既存ラチス材とを有し、前記一対の既存弦材間で隣り合う前記既存ラチス材の間に、それら隣り合う既存ラチス材を２辺とし、それら隣り合う既存ラチス材に挟まれた前記既存弦材部分を一辺とする三角形スペースが、隣り合う既存ラチス材で挟まれた頂点が逆向きとなるように複数並べられて配置されている既存鋼構造部材を補強する構造であって、前記三角形スペースに対応した形状の複数の三角形鋼板が設けられ、それら三角形鋼板が前記三角形スペースに装入され、前記三角形鋼板の一辺が前記三角形スペースの一辺を構成する前記既存弦材にドリルねじまたは打ち込み鋲により取り付けられると共に、前記三角形鋼板の一辺に対向する前記三角形鋼板の頂点が前記既存弦材に対向する他方の既存弦材にドリルねじまたは打ち込み鋲により取り付けられていることを特徴とする。 In order to achieve the above object, the present invention provides a pair of existing chord members that extend opposite to each other, and a plurality of existing chord members that are slanted with respect to the direction in which the existing chord members extend. A structure for reinforcing an existing steel structural member having an existing lattice material, wherein a plurality of reinforcing lattice materials having the same length as the existing lattice material are provided, and at both ends in the longitudinal direction of the reinforcing lattice material, A spacer having the same thickness as the existing lattice material is attached, and the center of the longitudinal direction of the reinforcing lattice material is applied to the center of the longitudinal direction of each of the existing lattice materials and is oblique to the extending direction of the existing string material The reinforcing lattice material is spanned between the pair of string members in a direction opposite to the existing lattice material, and spacers at both ends in the longitudinal direction are respectively applied to the pair of existing string materials, Both ends of the lattice material Along with the screw, it is attached to the pair of existing strings by a drill screw or a driving rod, and the longitudinal center of the reinforcing lattice material is attached to the center of the existing lattice material by a drill screw or a driving rod. It is characterized by being.
The present invention also includes a pair of existing string members that extend opposite to each other, and a plurality of existing lattice materials that are diagonally spanned between the existing string members in a direction in which the existing string members extend. Between the existing lattice materials adjacent to each other between the pair of existing string materials, the adjacent existing lattice materials are two sides, and the existing string material portion sandwiched between the adjacent existing lattice materials is one side The triangular space is a structure that reinforces existing steel structural members arranged side by side so that the apexes sandwiched between adjacent existing lattice materials are in opposite directions, and has a shape corresponding to the triangular space A plurality of triangular steel plates are provided, the triangular steel plates are inserted into the triangular space, and one side of the triangular steel plate is removed from the existing string material constituting one side of the triangular space with a drill screw or a driving rod. With kicked, characterized in that the apex of the triangle steel sheet opposite to one side of the triangular steel plate is mounted by the other existing chord to the drill screw or implant stud facing the existing chord.

本発明によれば、既存鋼構造部材の面内および面外剛性性能や耐力の向上を図ることが可能となる。
また、ドリルねじや打ち込み鋲を用いるので、有資格者による作業を減少して人員配置を迅速に行なえ、工期の短縮化、施工コストの低減化を図る上で有利となり、火気を使用することなく補強を行なえ、したがって、溶接の際の火気養生は不要となり、工期の短縮化および施工コストを低減化する上で有利となる。 According to the present invention, it is possible to improve in-plane and out-of-plane rigidity performance and proof stress of existing steel structural members.
In addition, since drill screws and driving rods are used, work by qualified personnel can be reduced and personnel can be allocated quickly, which is advantageous for shortening the construction period and reducing construction costs, without using fire. Reinforcement can be performed, and therefore, heat curing at the time of welding becomes unnecessary, which is advantageous in shortening the construction period and reducing the construction cost.

以下、本発明の実施の形態について図面にしたがって説明する。
図１（Ａ）は補強すべき既存のラチス柱の平面図、（Ｂ）は同正面図を示している。
補強すべき既存のラチス柱１２は、互いに対向して鉛直方向に延在する一対の既存弦材１４と、それら既存弦材１４間に鉛直方向に対して斜めに掛け渡された複数の既存ラチス材（斜材）１６とを含んで構成されている。
本実施の形態では、既存弦材１４として山形鋼が用いられ、既存弦材１４は矩形の頂点に位置するように配置され、それら４つの既存弦材１４により鉛直方向に延在する直方体の輪郭が形成され、その直方体の各側面を構成する一対の既存弦材１４間にそれぞれ複数の既存ラチス材１６が設けられている。
既存ラチス材１６は型鋼で構成され、型鋼として平鋼が用いられている。
既存ラチス材１６の長手方向の両端は、各既存弦材１４を構成する山形鋼のフランジ１４０２にリベットにより、あるいは、ボルト、ナットの締結により固定されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1A is a plan view of an existing lattice pillar to be reinforced, and FIG. 1B is a front view thereof.
The existing lattice pillar 12 to be reinforced includes a pair of existing string members 14 extending in the vertical direction so as to face each other, and a plurality of existing lattices spanned obliquely with respect to the vertical direction between the existing string members 14. And a material (diagonal material) 16.
In the present embodiment, angle steel is used as the existing chord material 14, the existing chord material 14 is disposed so as to be positioned at the apex of the rectangle, and the outline of the rectangular parallelepiped extending in the vertical direction by these four existing chord materials 14. A plurality of existing lattice members 16 are provided between a pair of existing string members 14 constituting each side surface of the rectangular parallelepiped.
The existing lattice material 16 is made of mold steel, and flat steel is used as the mold steel.
Both ends of the existing lattice material 16 in the longitudinal direction are fixed to angle flanges 1402 constituting the existing string materials 14 by rivets or by fastening bolts and nuts.

（第１の実施の形態）
図２は第１の実施の形態の補強構造の説明図で、（Ａ）はラチス柱の平面図、（Ｂ）は同正面図を示している。
第１の実施の形態では、このようなラチス柱１２を補強するに際して、複数の補強用ラチス材２０が設けられる。
本実施の形態では、補強用ラチス材２０は型鋼で構成され、型鋼として既存ラチス材１６と同じ厚さ、長さ、幅の平鋼が用いられている。
各補強用ラチス材２０の長手方向の両端には、既存ラチス材１６と同じ厚さのスペーサ（鋼板）２２が取り付けられている。 (First embodiment)
2A and 2B are explanatory views of the reinforcing structure of the first embodiment. FIG. 2A is a plan view of a lattice pillar, and FIG. 2B is a front view thereof.
In the first embodiment, when reinforcing such a lattice pillar 12, a plurality of reinforcing lattice materials 20 are provided.
In the present embodiment, the reinforcing lattice material 20 is made of die steel, and a flat steel having the same thickness, length and width as the existing lattice material 16 is used as the die steel.
Spacers (steel plates) 22 having the same thickness as the existing lattice material 16 are attached to both ends of each reinforcing lattice material 20 in the longitudinal direction.

ラチス柱１２を補強するには、まず、補強用ラチス材２０の長手方向の中央を各既存ラチス材１６の長手方向の中央に当て付け鉛直方向に対して斜めで既存ラチス材１６と逆向きに補強用ラチス材２０を一対の既存弦材１４間に掛け渡し、その長手方向の両端のスペーサ２２を一対の既存弦材１４のフランジ１４０２にそれぞれ当て付ける。
つぎに、補強用ラチス材２０の両端をスペーサ２２と共に、ドリルねじＤまたは打ち込み鋲Ｂにより一対の既存弦材１４に取り付ける。
また、補強用ラチス材２０の長手方向の中央を、ドリルねじＤまたは打ち込み鋲Ｂにより既存ラチス材１６の長手方向の中央に取り付ける。
これにより、補強用ラチス材２０の長手方向の中央が各既存ラチス材１６の長手方向の中央に当て付けられ、鉛直方向に対して斜めで既存ラチス材１６と逆向きに補強用ラチス材２０が一対の既存弦材１４間に掛け渡たされ、その長手方向の両端のスペーサ２２が一対の既存弦材１４のフランジ１４０２にそれぞれ当て付けられ、かつ、補強用ラチス材２０の両端がスペーサ２２と共に、ドリルねじＤまたは打ち込み鋲Ｂにより一対の既存弦材１４に取り付けられ、補強用ラチス材２０の長手方向の中央が、ドリルねじＤまたは打ち込み鋲Ｂにより既存ラチス材１６の長手方向の中央に取り付けられた補強構造が得られる。
なお、補強用ラチス材２０を設ける箇所は、直方体状の輪郭を呈するラチス柱１２の４つの側面の全てでもよく、あるいは、３つ、あるいは、２つ、あるいは、１つの側面でもよい。 In order to reinforce the lattice pillar 12, first, the center in the longitudinal direction of the reinforcing lattice material 20 is applied to the center in the longitudinal direction of each existing lattice material 16, and oblique to the vertical direction and opposite to the existing lattice material 16. The reinforcing lattice material 20 is spanned between the pair of existing string members 14, and the spacers 22 at both ends in the longitudinal direction are respectively applied to the flanges 1402 of the pair of existing string members 14.
Next, both ends of the reinforcing lattice material 20 are attached to the pair of existing chord members 14 together with the spacers 22 by a drill screw D or a driving rod B.
Further, the center in the longitudinal direction of the reinforcing lattice material 20 is attached to the center in the longitudinal direction of the existing lattice material 16 by the drill screw D or the driving rod B.
As a result, the center in the longitudinal direction of the reinforcing lattice material 20 is applied to the center in the longitudinal direction of each existing lattice material 16, and the reinforcing lattice material 20 is inclined with respect to the vertical direction and opposite to the existing lattice material 16. It spans between a pair of existing string members 14, the spacers 22 at both ends in the longitudinal direction are respectively applied to the flanges 1402 of the pair of existing string members 14, and both ends of the reinforcing lattice material 20 together with the spacers 22 The center of the longitudinal direction of the lattice material 20 for reinforcement is attached to the center of the longitudinal direction of the existing lattice material 16 with the drill screw D or the driving rod B. The obtained reinforcing structure is obtained.
Note that the place where the reinforcing lattice material 20 is provided may be all four side surfaces of the lattice pillar 12 exhibiting a rectangular parallelepiped shape, or may be three, two, or one side surface.

ドリルねじＤは、頭部と、頭部から突出するねじ部と、ねじ部の先端から突出するドリル刃とを備え、施工時にその先端のドリル刃が鋼板にタッピング用の下孔をあけ、続いてねじ部がその下孔にタッピングして締め付けを完了するものであり、電動式やエア式のドライバを用いることで、補強用ラチス材２０の端部およびスペーサ２２が既存弦材１４のフランジ１４０２に対してがたつくことなく密接した接合状態で簡単に確実に取り付けられ、また、補強用ラチス材２０の長手方向の中央が既存ラチス材１６の長手方向の中央に対してがたつくことなく密接した接合状態で簡単に確実に取り付けられる。
また、打ち込み鋲Ｂ２２は、頭部と軸部とを有し、軸部の先端が鋭く尖った鋲であり、エア式やガス式、火薬式などの打鋲機を用いて打ち込むことにより、下孔をあけていない鋼材にも、あたかも木材に釘を打ち込むように打ち込むことができる鋲であり、ドリルねじＤと同様に、補強用ラチス材２０の端部およびスペーサ２２が既存弦材１４のフランジ１４０２に対してがたつくことなく密接した接合状態で簡単に確実に取り付けられ、また、補強用ラチス材２０の長手方向の中央が既存ラチス材１６の長手方向の中央に対してがたつくことなく密接した接合状態で簡単に確実に取り付けられる。
なお、補強用ラチス材２０の端部およびスペーサ２２に、また、補強用ラチス材２０の長手方向の中央に、ドリルねじＤや打ち込み鋲Ｂ２２の挿通孔（下孔）を予め形成しておくと、施工効率を高める上で極めて有利となる。 The drill screw D includes a head, a screw portion protruding from the head, and a drill blade protruding from the tip of the screw portion, and the drill blade at the tip opens a tapping pilot hole in the steel plate during construction, The screw portion is tapped into the lower hole to complete the tightening, and the end of the reinforcing lattice material 20 and the spacer 22 are connected to the flange 1402 of the existing string material 14 by using an electric or pneumatic driver. It is easily and securely attached in a tightly joined state without rattling, and the longitudinally center of the reinforcing lattice material 20 is closely joined to the longitudinally center of the existing lattice material 16 without shaking. Can be easily and securely attached.
Further, the driving rod B22 has a head and a shaft portion, and the tip of the shaft portion is sharp and sharp, and can be lowered by driving it using an air-type, gas-type, or explosive-type driving device. It is a saddle that can be driven as if a nail is driven into wood, even in a steel material that is not perforated. Like the drill screw D, the end of the reinforcing lattice material 20 and the spacer 22 are flanges of the existing string material 14. 1402 can be easily and securely attached in a tightly joined state without rattling, and the longitudinal center of the reinforcing lattice 20 is intimately joined to the longitudinal center of the existing lattice 16 without rattling. Can be easily and securely installed in the state.
It is to be noted that an insertion hole (a lower hole) for the drill screw D or the driving rod B22 is formed in advance in the end portion of the reinforcing lattice material 20 and the spacer 22 and in the center in the longitudinal direction of the reinforcing lattice material 20. This is extremely advantageous in increasing construction efficiency.

本実施の形態によれば、ラチス柱１２を構成する複数の既存ラチス材１６と向きを逆にして複数の補強用ラチス材２０をそれぞれ交差させ、各補強用ラチス材２０の長手方向の両端と中央を、既存弦材１４と既存ラチス材１６とに取着するようにしたので、ラチス柱１２の面内および面外剛性性能や耐力の向上を図ることが可能となる。
また、ラチス柱１２を補強するに際し、ドリルねじＤや打ち込み鋲Ｂ２２を用いて複数の補強用ラチス材２０をそれぞれ既存ラチス材１６に取着するようにしており、この作業は、電動式やエア式のドライバや打鋲機などを用いて簡単に行なえるので、有資格者による作業を減少して人員配置を迅速に行なえ、工期の短縮化、施工コストの低減化を図る上で有利となる。
各補強用ラチス材２０の長手方向の両端に、既存ラチス材１６と同じ厚さのスペーサ２２が取り付けられているので、補強用ラチス材２０と既存ラチス材１６とがそれらの長手方向の中央で干渉することはなく、補強用ラチス材２０の配設も簡単になされる。
また、本実施の形態では、ドリルねじＤや打ち込み鋲Ｂ２２を用いているので、火気を使用することなくラチス柱１２の補強を行なえ、したがって、溶接の際の火気養生は不要となり、工期の短縮化および施工コストを低減化する上で有利となる。 According to the present embodiment, a plurality of reinforcing lattices 20 are crossed in opposite directions to a plurality of existing lattice materials 16 constituting the lattice pillars 12, and both longitudinal ends of each reinforcing lattice material 20 are Since the center is attached to the existing string material 14 and the existing lattice material 16, it is possible to improve the in-plane and out-of-plane rigidity performance and proof stress of the lattice column 12.
Further, when the lattice pillar 12 is reinforced, the plurality of reinforcing lattice materials 20 are respectively attached to the existing lattice material 16 by using the drill screw D or the driving rod B22. It is easy to use a driver or a hammering machine, so it is advantageous to reduce the work by qualified personnel and perform personnel assignment quickly, shortening the construction period and reducing the construction cost. .
Since the spacers 22 having the same thickness as the existing lattice material 16 are attached to both ends in the longitudinal direction of each reinforcing lattice material 20, the reinforcing lattice material 20 and the existing lattice material 16 are in the center in the longitudinal direction. There is no interference, and the reinforcing lattice material 20 can be easily arranged.
Further, in this embodiment, since the drill screw D and the driving rod B22 are used, the lattice column 12 can be reinforced without using fire, and therefore, the heat curing during welding is unnecessary, and the construction period is shortened. This is advantageous in reducing the cost and construction cost.

（第２の実施の形態）
図３は第２の実施の形態の補強構造の説明図で、（Ａ）はラチス柱の平面図、（Ｂ）は同正面図を示している。
第２の実施の形態では、図１に示すラチス柱１２を補強するに際して、複数の三角形鋼板３０が用いられる。
上述のように、図１に示すラチス柱１２の各側面は、互いに対向して鉛直に延在する一対の既存弦材１４と、それら既存弦材１４間に鉛直方向に対して斜めに掛け渡された複数の既存ラチス材１６とを有している。
そして、一対の既存弦材１４間で上下に隣り合う既存ラチス材１６の間に、それら上下の既存ラチス材１６を２辺とし、それら上下の既存ラチス材１６に挟まれた既存弦材１４部分を一辺とする三角形スペースＳが、上下に隣り合う既存ラチス材１６で挟まれた頂点が逆向きとなるように上下に複数並べられて配置されている。 (Second Embodiment)
3A and 3B are explanatory views of the reinforcing structure of the second embodiment. FIG. 3A is a plan view of a lattice pillar, and FIG. 3B is a front view thereof.
In the second embodiment, a plurality of triangular steel plates 30 are used when reinforcing the lattice pillar 12 shown in FIG.
As described above, each side surface of the lattice column 12 shown in FIG. 1 is paired with a pair of existing string members 14 that vertically extend opposite to each other, and the existing string members 14 are slanted with respect to the vertical direction. And a plurality of existing lattice materials 16.
And between the existing lattice material 16 adjacent up and down between a pair of existing string materials 14, the upper and lower existing lattice materials 16 are two sides, and the existing string material 14 portion sandwiched between the upper and lower existing lattice materials 16 A plurality of triangular spaces S having one side as a side are arranged vertically so that the apexes sandwiched between the existing lattice materials 16 adjacent to each other in the vertical direction are opposite to each other.

複数の三角形鋼板３０は三角形スペースＳに対応した形状の三角形で形成されている。より詳細には、三角形スペースＳに装入できる寸法で形成されている。   The plurality of triangular steel plates 30 are formed of triangles having a shape corresponding to the triangular space S. More specifically, it is formed with a size that can be inserted into the triangular space S.

ラチス柱１２を補強するには、三角形鋼板３０を三角形スペースＳに装入し、三角形鋼板の一辺を三角形スペースＳの一辺を構成する既存弦材１４（フランジ１４０２）に当て付けドリルねじＤまたは打ち込み鋲Ｂにより取り付けると共に、三角形鋼板３０の一辺に対向する三角形鋼板の頂点Ｔを既存弦材１４に対向する他方の既存弦材１４（フランジ１４０２）に当て付けドリルねじＤまたは打ち込み鋲Ｂにより取り付ける。
このようにして、上下に並べられた複数の三角形スペースＳにそれぞれ三角形鋼板３０を挿入し、取り付けていく。
これにより、三角形鋼板３０が三角形スペースＳに装入され、三角形鋼板の一辺が三角形スペースＳの一辺を構成する既存弦材１４（フランジ１４０２）に当て付けられ、ドリルねじＤまたは打ち込み鋲Ｂにより取り付けられると共に、三角形鋼板３０の一辺に対向する三角形鋼板の頂点Ｔが既存弦材１４に対向する他方の既存弦材１４（フランジ１４０２）に当て付けられ、ドリルねじＤまたは打ち込み鋲Ｂにより取り付けられた補強構造が得られる。
なお、三角形鋼板３０を設ける箇所は、直方体状の輪郭を呈するラチス柱１２の４つの側面の全てでもよく、あるいは、３つ、あるいは、２つ、あるいは、１つの側面でもよい。
また、三角形鋼板３０に、ドリルねじＤや打ち込み鋲Ｂ２２の挿通孔（下孔）を予め形成しておくと、施工効率を高める上で極めて有利となる。 In order to reinforce the lattice pillar 12, the triangular steel plate 30 is inserted into the triangular space S, one side of the triangular steel plate is applied to the existing chord material 14 (flange 1402) constituting one side of the triangular space S, and the drill screw D or driving in Attach with the ridge B, and apply the apex T of the triangular steel plate facing one side of the triangular steel plate 30 to the other existing chord material 14 (flange 1402) facing the existing chord material 14 with the drill screw D or the driving rod B.
In this manner, the triangular steel plates 30 are inserted and attached to the plurality of triangular spaces S arranged vertically.
Thereby, the triangular steel plate 30 is inserted into the triangular space S, and one side of the triangular steel plate is applied to the existing chord material 14 (flange 1402) constituting one side of the triangular space S, and is attached by the drill screw D or the driving rod B. At the same time, the apex T of the triangular steel plate facing one side of the triangular steel plate 30 is applied to the other existing chord material 14 (flange 1402) facing the existing chord material 14 and attached by the drill screw D or the driving rod B. A reinforcing structure is obtained.
Note that the triangular steel plate 30 may be provided on all four side surfaces of the lattice pillar 12 having a rectangular parallelepiped outline, or on three, two, or one side surface.
Moreover, it is very advantageous to increase the construction efficiency if the triangular steel plate 30 is previously formed with an insertion hole (a lower hole) for the drill screw D and the driving rod B22.

本実施の形態によれば、ラチス柱１２の側面の三角形スペースＳに三角形鋼板３０を装入し取り付けていくようにしたので、ラチス柱１２の面内および面外剛性性能や耐力の向上を図ることが可能となる。
特に、ラチス柱１２の４つの側面の全てに三角形鋼板３０を取り付けるようにすると、ラチス柱１２は箱型断面となり、ラチス柱１２の面内および面外剛性性能や耐力の向上を図る上でより一層有利となる。
また、ラチス柱１２を補強するに際し、ドリルねじＤや打ち込み鋲Ｂ２２を用いて複数の三角形鋼板３０をラチス柱１２に取着するようにしたので、第１の実施の形態と同様に、有資格者による作業を減少して人員配置を迅速に行なえ、工期の短縮化、施工コストの低減化を図る上で有利となり、また、溶接の際の火気養生は不要となり、工期の短縮化および施工コストを低減化する上で有利となる。 According to the present embodiment, since the triangular steel plate 30 is inserted and attached to the triangular space S on the side surface of the lattice column 12, the in-plane and out-of-plane rigidity performance and proof stress of the lattice column 12 are improved. It becomes possible.
In particular, when the triangular steel plate 30 is attached to all four side surfaces of the lattice column 12, the lattice column 12 has a box-shaped cross section, which is more effective in improving in-plane and out-of-plane rigidity performance and proof stress of the lattice column 12. It becomes even more advantageous.
In addition, since the plurality of triangular steel plates 30 are attached to the lattice column 12 using the drill screw D or the driving rod B22 when reinforcing the lattice column 12, the qualification is the same as in the first embodiment. This makes it possible to reduce the number of work performed by the worker and speed up the assignment of personnel, which is advantageous for shortening the construction period and reducing the construction cost. In addition, there is no need for thermal curing during welding, shortening the construction period and construction cost. This is advantageous in reducing the.

（第３の実施の形態）
図４は第３の実施の形態の補強構造の説明図で、（Ａ）はラチス柱の平面図、（Ｂ）は同正面図を示している。
第３の実施の形態は、第２の実施の形態に、さらに、つなぎ鋼鈑４０を用いたものである。すなわち、第３の実施の形態では、三角形鋼鈑３０とつなぎ鋼鈑４０を用いてラチス柱１２を補強している。
第３の実施の形態では、三角形鋼鈑３０はその厚さが既存ラチス材１６の厚さと同一のものを用い、第２の実施の形態の通りに複数の三角形鋼板３０を三角形スペースＳに装入し、ラチス柱１２に取り付ける。
この状態で、三角形鋼板が既存ラチス材１６に臨む縁と、この縁に臨む既存ラチス材１６の縁との間に隙間Мが存在している。
第３の実施の形態では、この隙間Мを閉塞する幅で、それら縁に沿って一対の既存弦材１４間に延在する長さの複数のつなぎ鋼板４０を設ける。 (Third embodiment)
4A and 4B are explanatory views of a reinforcing structure according to the third embodiment. FIG. 4A is a plan view of a lattice pillar, and FIG. 4B is a front view thereof.
In the third embodiment, a connecting steel plate 40 is further used in the second embodiment. That is, in the third embodiment, the lattice column 12 is reinforced using the triangular steel plate 30 and the connecting steel plate 40.
In the third embodiment, the triangular steel plate 30 has the same thickness as that of the existing lattice material 16, and a plurality of triangular steel plates 30 are mounted in the triangular space S as in the second embodiment. And attach to the lattice pillar 12.
In this state, there is a gap М between the edge of the triangular steel plate facing the existing lattice material 16 and the edge of the existing lattice material 16 facing this edge.
In the third embodiment, a plurality of connecting steel plates 40 having a width that closes the gap М and extending between the pair of existing chord members 14 along the edges are provided.

そして、三角形鋼板３０と既存ラチス材１６との隙間Мを閉塞するように複数のつなぎ鋼板４０を配置し、それらつなぎ鋼板４０の幅方向の両端で長手方向に沿った複数箇所を、三角形鋼板３０の長手方向に沿った複数箇所および既存ラチス材１６の長手方向に沿った複数箇所にドリルねじＤまたは打ち込み鋲Ｂにより取り付ける。
これにより三角形鋼板３０と既存ラチス材１６との隙間Мを閉塞するように複数のつなぎ鋼板４０が配置され、それらつなぎ鋼板４０の幅方向の両端で長手方向に沿った複数箇所が、三角形鋼板３０の長手方向に沿った複数箇所および既存ラチス材１６の長手方向に沿った複数箇所にドリルねじＤまたは打ち込み鋲Ｂにより取り付けられた補強構造が得られる。
この場合、つなぎ鋼板４０の幅方向の両端でその長手方向に沿った複数箇所に、ドリルねじＤまたは打ち込み鋲Ｂの挿通用の下孔を予め形成しておくと、施工効率を高める上で極めて有利となる。 Then, a plurality of connecting steel plates 40 are arranged so as to close the gap М between the triangular steel plate 30 and the existing lattice material 16, and the triangular steel plates 30 are arranged at a plurality of locations along the longitudinal direction at both ends in the width direction of the connecting steel plates 40. Are attached by drill screws D or driving rods B at a plurality of locations along the longitudinal direction of the material and at a plurality of locations along the longitudinal direction of the existing lattice material 16.
Thus, a plurality of connecting steel plates 40 are arranged so as to close the gap М between the triangular steel plate 30 and the existing lattice material 16, and a plurality of locations along the longitudinal direction at both ends in the width direction of the connecting steel plates 40 are triangular steel plates 30. The reinforcement structure attached by the drill screw D or the driving rod B is obtained at a plurality of locations along the longitudinal direction and at a plurality of locations along the longitudinal direction of the existing lattice material 16.
In this case, if the pilot holes for inserting the drill screw D or the driving rod B are formed in advance at a plurality of locations along the longitudinal direction at both ends in the width direction of the connecting steel plate 40, it is extremely effective for improving the construction efficiency. It will be advantageous.

第３の実施の形態によれば、第２の実施の形態と同様な効果が奏されるほか、三角形鋼板３０と既存ラチス材１６とが一体化されるので、力の伝達がスムーズになされラチス柱１２の耐力を増強する上で極めて有利となる。   According to the third embodiment, in addition to the same effects as those of the second embodiment, the triangular steel plate 30 and the existing lattice material 16 are integrated, so that the force is smoothly transmitted and the lattice is achieved. This is extremely advantageous in increasing the proof stress of the column 12.

なお、第１乃至第３の実施の形態では、ラチス柱を補強する場合について説明したが、本発明は、ラチス材を有する既存鋼構造部材に広く適用可能であり、したがって、既存構造部材はラチス材を有する柱に限定されず、ラチス材を有する梁などの各種の既存鋼構造部材に広く適用されるものである。   In the first to third embodiments, the case where the lattice pillar is reinforced has been described. However, the present invention is widely applicable to existing steel structural members having a lattice material, and therefore the existing structural members are latticed. The present invention is not limited to a pillar having a material, and is widely applied to various existing steel structural members such as a beam having a lattice material.

（Ａ）は補強すべき既存のラチス柱の平面図、（Ｂ）は補強すべき既存のラチス柱の正面図である。(A) is a top view of the existing lattice pillar which should be reinforced, (B) is a front view of the existing lattice pillar which should be reinforced. 第１の実施の形態の補強構造の説明図で、（Ａ）はラチス柱の平面図、（Ｂ）はラチス柱の正面図である。It is explanatory drawing of the reinforcement structure of 1st Embodiment, (A) is a top view of a lattice pillar, (B) is a front view of a lattice pillar. 第２の実施の形態の補強構造の説明図で、ラチス柱の正面図である。It is explanatory drawing of the reinforcement structure of 2nd Embodiment, and is a front view of a lattice pillar. 第３の実施の形態の補強構造の説明図で、（Ａ）はラチス柱の平面図、（Ｂ）はラチス柱の正面図である。It is explanatory drawing of the reinforcement structure of 3rd Embodiment, (A) is a top view of a lattice pillar, (B) is a front view of a lattice pillar.

符号の説明Explanation of symbols

１２……ラチス柱、１４……既存弦材、１６……既存ラチス材、２０……補強用ラチス材、３０……三角形鋼板、４０……つなぎ鋼板。   12 ... Lattice column, 14 ... Existing string material, 16 ... Existing lattice material, 20 ... Lattice material for reinforcement, 30 ... Triangle steel plate, 40 ... Connecting steel plate.

Claims (5)

互いに対向して延在する一対の既存弦材と、それら既存弦材間にそれら既存弦材が延在する方向に対して斜めに掛け渡された複数の既存ラチス材とを有する既存鋼構造部材を補強する構造であって、
前記既存ラチス材と同じ長さの複数の補強用ラチス材が設けられ、
前記補強用ラチス材の長手方向の両端に、前記既存ラチス材と同じ厚さのスペーサが取り付けられ、
前記補強用ラチス材の長手方向の中央が前記各既存ラチス材の長手方向の中央に当て付けられ前記既存弦材の延在方向に対して斜めで前記既存ラチス材と逆向きに前記補強用ラチス材が前記一対の弦材間に掛け渡わたされてその長手方向の両端のスペーサが前記一対の既存弦材にそれぞれ当て付けられ、
前記補強用ラチス材の両端は前記スペーサと共に、ドリルねじまたは打ち込み鋲により前記一対の既存弦材に取り付けられ、
前記補強用ラチス材の長手方向の中央は、ドリルねじまたは打ち込み鋲により前記既存ラチス材の長手方向の中央に取り付けられている、
ことを特徴とする既存鋼構造部材の補強構造。 An existing steel structural member having a pair of existing chord members extending opposite to each other and a plurality of existing lattice members that are slanted between the existing chord members in a direction in which the existing chord members extend. It is a structure that reinforces,
A plurality of reinforcing lattice materials having the same length as the existing lattice material are provided,
Spacers having the same thickness as the existing lattice material are attached to both ends in the longitudinal direction of the reinforcing lattice material,
The center of the reinforcing lattice material in the longitudinal direction is applied to the center of the longitudinal direction of each of the existing lattice materials, and the reinforcing lattice is inclined with respect to the extending direction of the existing string material and opposite to the existing lattice material. A material is stretched between the pair of string members, and spacers at both ends in the longitudinal direction are respectively applied to the pair of existing string members,
Both ends of the reinforcing lattice material are attached to the pair of existing string materials by a drill screw or a driving rod together with the spacer,
The longitudinal center of the reinforcing lattice material is attached to the longitudinal center of the existing lattice material by a drill screw or a driving rod.
Reinforcing structure of existing steel structural member characterized by the above. 前記補強用ラチス材の長手方向の両端と中央に、ドリルねじまたは打ち込み鋲の挿通用の下孔が形成されていることを特徴とする既存鋼構造部材の補強構造。   A reinforcing structure for an existing steel structural member, characterized in that a drill screw or a pilot hole for inserting a driving rod is formed at both ends and the center in the longitudinal direction of the reinforcing lattice material. 互いに対向して延在する一対の既存弦材と、それら既存弦材間にそれら既存弦材が延在する方向に対して斜めに掛け渡された複数の既存ラチス材とを有し、前記一対の既存弦材間で隣り合う前記既存ラチス材の間に、それら隣り合う既存ラチス材を２辺とし、それら隣り合う既存ラチス材に挟まれた前記既存弦材部分を一辺とする三角形スペースが、隣り合う既存ラチス材で挟まれた頂点が逆向きとなるように複数並べられて配置されている既存鋼構造部材を補強する構造であって、
前記三角形スペースに対応した形状の複数の三角形鋼板が設けられ、
それら三角形鋼板が前記三角形スペースに装入され、前記三角形鋼板の一辺が前記三角形スペースの一辺を構成する前記既存弦材にドリルねじまたは打ち込み鋲により取り付けられると共に、前記三角形鋼板の一辺に対向する前記三角形鋼板の頂点が前記既存弦材に対向する他方の既存弦材にドリルねじまたは打ち込み鋲により取り付けられている、
ことを特徴とする既存鋼構造部材の補強構造。 A pair of existing string members extending opposite to each other, and a plurality of existing lattice members that are slanted between the existing string members in a direction in which the existing string members extend. Between the existing lattice materials adjacent between the existing string materials, the adjacent existing lattice materials are two sides, and a triangular space having the existing string material portion sandwiched between the adjacent existing lattice materials as one side, It is a structure that reinforces existing steel structural members that are arranged side by side so that the apex sandwiched between adjacent existing lattice materials is in the opposite direction,
A plurality of triangular steel plates having a shape corresponding to the triangular space are provided,
The triangular steel plates are inserted into the triangular space, and one side of the triangular steel plate is attached to the existing string material constituting one side of the triangular space with a drill screw or a driving rod, and the one side of the triangular steel plate is opposed to the side. The apex of the triangular steel plate is attached to the other existing string material facing the existing string material by a drill screw or a driving rod,
Reinforcing structure of existing steel structural member characterized by the above. 前記三角形鋼鈑の厚さは前記既存ラチス材の厚さと同一であり、
前記三角形鋼板が前記既存ラチス材に臨む縁と、この縁に臨む前記既存ラチス材の縁との間の隙間を閉塞する幅で、それら縁に沿って前記一対の既存弦材間に延在する長さの複数のつなぎ鋼板が設けられ、
前記三角形鋼板と前記既存ラチス材との前記隙間を閉塞するように前記複数のつなぎ鋼板が配置され、それらつなぎ鋼板の幅方向の両端で長手方向に沿った複数箇所が、前記三角形鋼板の長手方向に沿った複数箇所および前記既存ラチス材の長手方向に沿った複数箇所にドリルねじまたは打ち込み鋲により取り付けられている、
ことを特徴とする請求項３記載の既存鋼構造部材の補強構造。 The thickness of the triangular steel plate is the same as the thickness of the existing lattice material,
The triangular steel plate has a width that closes a gap between an edge facing the existing lattice material and an edge of the existing lattice material facing the edge, and extends between the pair of existing string materials along the edges. A plurality of connecting steel plates of length are provided,
The plurality of connecting steel plates are disposed so as to close the gap between the triangular steel plate and the existing lattice material, and a plurality of locations along the longitudinal direction at both ends in the width direction of the connecting steel plates are in the longitudinal direction of the triangular steel plate. Are attached with a drill screw or a driving rod at a plurality of locations along the longitudinal direction of the existing lattice material,
The reinforcement structure of the existing steel structural member of Claim 3 characterized by the above-mentioned. 前記三角形鋼板および前記つなぎ鋼板に、ドリルねじまたは打ち込み鋲の挿通用の下孔が形成されていることを特徴とする請求項４記載の既存鋼構造部材の補強構造。   The reinforcing structure for an existing steel structural member according to claim 4, wherein a pilot hole for inserting a drill screw or a driving rod is formed in the triangular steel plate and the connecting steel plate.
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