JP6610932B2 - Seismic reinforcement method for buildings - Google Patents

Seismic reinforcement method for buildings Download PDF

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JP6610932B2
JP6610932B2 JP2015188063A JP2015188063A JP6610932B2 JP 6610932 B2 JP6610932 B2 JP 6610932B2 JP 2015188063 A JP2015188063 A JP 2015188063A JP 2015188063 A JP2015188063 A JP 2015188063A JP 6610932 B2 JP6610932 B2 JP 6610932B2
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秀宜 門脇
博孝 松森
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Shimizu Corp
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本発明は、建物の構面に設置されて建物の耐震性（耐振性）を高めるための耐震補強工法に関する。   The present invention relates to a seismic reinforcement method for increasing the earthquake resistance (vibration resistance) of a building that is installed on a building surface.

従来、建物の耐震強度を高めるための対策として、すなわち、建物に制振性能を付与するために、建物の架構内に補強ブレースを架設する手法が多用されている。   Conventionally, as a measure for increasing the seismic strength of a building, that is, in order to impart vibration control performance to the building, a method of installing a reinforcing brace in the building frame is often used.

また、並立する一対のコンクリート柱と上下一対のコンクリート梁で形成される架構空間に枠付きの補強ブレースを配設し、枠付き補強ブレースの枠体の外周面とコンクリート柱、上下のコンクリート梁との間にモルタルを充填し、硬化したモルタルを介して枠付き補強ブレースを架構内の所定位置に支持させて固定し、且つコンクリート躯体からの応力を効果的に補強ブレースに伝達するように構成したものがある（例えば、特許文献１参照）。   In addition, a reinforcing brace with a frame is disposed in a frame space formed by a pair of side-by-side concrete columns and a pair of upper and lower concrete beams, and the outer peripheral surface of the frame body of the reinforcing brace with frame, the concrete columns, and the upper and lower concrete beams The mortar is filled between the frames, the framed reinforcing brace is supported and fixed at a predetermined position in the frame through the hardened mortar, and the stress from the concrete frame is effectively transmitted to the reinforcing brace. There are some (see, for example, Patent Document 1).

特開２００４−２１１３１５号公報JP 2004-21113 A

しかしながら、上記従来の建物の耐震補強構造（建物の耐震補強工法）においては、ブレース材が大型化するほど、補強ブレース仕口のボルト本数及び列数が多くなり、現場ボルト接合前の建方時精度確保に多大な時間を要する。特に現場作業の削減を図る必要がある場合には建方時精度を確保することが工程計画上の問題点となる。   However, in the conventional building seismic strengthening structure (building seismic strengthening method), the larger the brace material, the greater the number of bolts and rows of the reinforcing brace joints. It takes a lot of time to ensure accuracy. In particular, when it is necessary to reduce work on site, it is a problem in process planning to ensure the accuracy of construction.

本発明は、上記事情に鑑み、現場作業を大幅に省力化することを可能にする建物の耐震補強工法を提供することを目的とする。   In view of the above circumstances, an object of the present invention is to provide a seismic reinforcement method for a building that can greatly reduce work on site.

上記の目的を達するために、この発明は以下の手段を提供している。   In order to achieve the above object, the present invention provides the following means.

また、本発明の建物の耐震補強工法は、逆Ｖ型に配設される一対の補強ブレースの上端部を上部鉄骨梁に接続するとともに、一対の縦材の下端部に横材を接続した枠体を、前記一対の縦材の上端部を前記上部鉄骨梁の両端部側にそれぞれ接続し、且つ前記一対の補強ブレースの下端部をそれぞれ前記枠体に接続してブレースユニットを形成するブレースユニット形成工程と、一対の柱と下部梁が施工された状態で、前記ブレースユニットを前記一対の柱の間の架構面内に配設し、前記上部鉄骨梁の両端部を前記柱にボルト接合して建物の大梁として構成するとともに、床コンクリートを打設することで、前記横材を前記下部梁と一体化させるブレースユニット接合工程とを備えることを特徴とする。 Moreover, the seismic reinforcement method for a building of the present invention is a frame in which the upper ends of a pair of reinforcing braces arranged in an inverted V shape are connected to the upper steel beam and a cross member is connected to the lower ends of the pair of vertical members. the body, and connected to the upper end of the pair of longitudinal members to the both ends of the upper steel beam, brace unit that forms a brace unit and to connect the lower ends of the pair of the reinforcing brace to each of the frame and forming step, in a state where the pair of columns and the lower beam is construction, the braces unit is disposed within the rack Plane between the pair of posts, and bolted the ends of the upper steel beam on said post together constituting a girder building Te, by pouring the floor concrete, characterized in that it comprises a brace unit bonding step of the cross member integral with the lower beam.

本発明の建物の耐震補強工法においては、上部鉄骨梁と補強ブレースを予め一体にユニット化したブレースユニットを建物の架構面内に配設し、上部鉄骨梁の両端部をそれぞれ柱にボルト接合することで、補強ブレースを所定位置に精度よく配設することが可能になる。   In the seismic reinforcement method for a building of the present invention, a brace unit in which an upper steel beam and a reinforcing brace are unitized in advance is arranged in the frame of the building, and both ends of the upper steel beam are respectively bolted to columns. Thus, the reinforcing brace can be accurately arranged at a predetermined position.

これにより、補強ブレースをそれぞれ所定位置に配設してボルト接合する従来と比較し、補強ブレースの建方精度の向上を図ることができ、ボルト孔合わせによるプレート変形等の不都合が生じることを回避できる。   As a result, it is possible to improve the construction accuracy of the reinforcing brace and prevent the occurrence of inconveniences such as deformation of the plate due to the bolt hole alignment, as compared with the conventional case where the reinforcing brace is arranged at a predetermined position and bolted. it can.

また、効率的に補強ブレースを設置できるため、現場労務費削減によるコストダウンを図ることができるとともに、補剛部材の数量の削減、補剛部材の省略を図ることも可能になる。   Further, since the reinforcing brace can be efficiently installed, it is possible to reduce the cost by reducing the labor cost at the site, and it is also possible to reduce the number of stiffening members and omit the stiffening members.

さらに、現場労務省力化による工期短縮を図ることができ、また、現場労務省力化による安全性向上を図ることも可能になる。   Furthermore, the construction period can be shortened by labor saving on-site labor, and safety can be improved by labor saving on-site labor.

本発明の一実施形態に係る建物の耐震補強構造（建物の耐震補強工法）を示す図である。It is a figure which shows the earthquake-proof reinforcement structure (the earthquake-proof reinforcement construction method of a building) of the building which concerns on one Embodiment of this invention.

以下、図１を参照し、本発明の一実施形態に係る建物の耐震補強工法について説明する。   Hereinafter, with reference to FIG. 1, the earthquake-proof reinforcement method of the building which concerns on one Embodiment of this invention is demonstrated.

はじめに、本実施形態は、建物の柱と梁の間の架構面内に補強ブレースを設置して建物の耐震性能を向上させるための耐震補強工法（耐震補強構造）に関するものである。   First, the present embodiment relates to a seismic strengthening method (seismic strengthening structure) for improving a seismic performance of a building by installing a reinforcing brace in a frame surface between columns and beams of the building.

具体的に、まず、本実施形態の建物の耐震補強構造Ａは、図１に示すように、略逆Ｖ字型の一対の補強ブレース（鉄骨ブレース／山形ブレース）１と、鉄骨材の上梁材（上部鉄骨梁）２と、Ｈ形鋼などの鉄骨材の枠体３とを備えて構成されている。
Specifically, first, seismic reinforcement structure A building of this embodiment, as shown in FIG. 1, a substantially inverted V-shaped pair of reinforcing braces (Steel Brace / Yamagata brace) 1, a beam on the steel material with product (upper steel beam) 2, is constituted by a frame 3 of the steel material such as H-shaped steel.

そして、本実施形態の建物の耐震補強工法（建物の耐震補強構造Ａ）では、一対の補強ブレース１の各上端部を鉄骨材の上梁材２の所定位置に予めボルト接合などによって接続し、上梁材２と一対の補強ブレース１を一体にユニット化する。   And in the earthquake-proof reinforcement method (building earthquake-proof reinforcement structure A) of the building of this embodiment, each upper end part of a pair of reinforcement braces 1 is connected to a predetermined position of the upper beam member 2 of the steel frame by bolting or the like in advance. The upper beam member 2 and the pair of reinforcing braces 1 are integrated into a unit.

さらに、本実施形態では、上梁材２の両端部側にそれぞれ上端部を溶接などによって接合し、一対の縦材３ａを設け、さらに一対の縦材３ａの下端部に溶接するなどして横材３ｂを一対の縦材３ａに連接する。これにより、一対の縦材３ａと横材３ｂからなる枠体３が上梁材２に一体に接合される。また、枠体３の各縦材３ａと横材３ｂの接合部分にガセットプレート４を設け、このガセットプレート４に各補強ブレース１の下端部側をボルト接合する。   Further, in the present embodiment, the upper ends are joined to the both ends of the upper beam member 2 by welding or the like, a pair of longitudinal members 3a are provided, and further welded to the lower end portions of the pair of longitudinal members 3a. The material 3b is connected to the pair of vertical members 3a. Thereby, the frame 3 which consists of a pair of vertical member 3a and cross member 3b is integrally joined to the upper beam member 2. Further, a gusset plate 4 is provided at a joint portion between the vertical members 3 a and the horizontal members 3 b of the frame 3, and the lower end side of each reinforcing brace 1 is bolted to the gusset plate 4.

このようにして、本実施形態では上梁材２と一対の補強ブレース１に加え、枠体３を一体に設けて予めブレースユニット５を形成する（ブレースユニット形成工程）。   Thus, in this embodiment, in addition to the upper beam member 2 and the pair of reinforcing braces 1, the frame body 3 is integrally provided to form the brace unit 5 in advance (brace unit forming step).

そして、上記のように形成したブレースユニット５を、クレーンなどの揚重機を用いて建物の架構面の所定位置に配設する。   Then, the brace unit 5 formed as described above is disposed at a predetermined position on the building surface of the building using a lifting machine such as a crane.

また、ブレースユニット５を所定位置に配置するとともに、上梁材２の両端部をそれぞれ柱６にボルト接合する。さらに、床コンクリート７を打設し、枠体３の横材３ｂを下梁材（下部梁）８と一体化させる（ブレースユニット接合工程）。
これにより、山形の補強ブレース１を建物の架構面内に設置することができる。 In addition, the brace unit 5 is disposed at a predetermined position, and both ends of the upper beam member 2 are bolted to the columns 6 respectively. Further, the floor concrete 7 is placed, and the cross member 3b of the frame 3 is integrated with the lower beam material (lower beam) 8 (brace unit joining step).
Thereby, the mountain-shaped reinforcement brace 1 can be installed in the frame of the building.

なお、上梁材２は両端で柱梁接合部と現場ボルト接合とし、軸力伝達を考慮した設計とする。また、枠鉄骨（横材３ｂ）は下部梁８上のスタッド９を弱軸で覆うように設置した後、床コンクリート７を打設する。このとき、横材３ｂのウェブに貫通孔を複数設けておくことにより、床コンクリート７と確実に一体化させ、せん断力を好適に伝達させるようにする。   In addition, the upper beam material 2 is made into a column beam joint part and a field bolt joint at both ends, and is designed in consideration of axial force transmission. Moreover, after installing the frame steel frame (cross member 3b) so that the stud 9 on the lower beam 8 may be covered with the weak shaft, the floor concrete 7 is placed. At this time, by providing a plurality of through holes in the web of the cross member 3b, it is surely integrated with the floor concrete 7 so that the shearing force is suitably transmitted.

また、枠鉄骨（縦材３ａ）は本体と直接の力の伝達をさせない。すなわち、この縦材３ａは、簡便のため、補強ブレース１の定規としての仮設的機能を有するものとしてもよい。したがって、この場合には、補強ブレース１からの水平力はすべて水平材で負担するため、ＲＣの鉛直スリット壁のような設計的な配慮が必要である。   Further, the frame steel frame (vertical member 3a) does not transmit force directly to the main body. In other words, the vertical member 3a may have a temporary function as a ruler of the reinforcing brace 1 for the sake of simplicity. Therefore, in this case, since all horizontal force from the reinforcing brace 1 is borne by the horizontal member, design considerations such as a vertical slit wall of RC are necessary.

したがって、本実施形態の建物の耐震補強工法（建物の耐震補強構造Ａ）においては、上梁材２と補強ブレース１を一体にユニット化したブレースユニット５を建物の架構面内に配設し、上梁材２の両端部をそれぞれ柱６にボルト接合することで、補強ブレース１を所定位置に精度よく配設することが可能になる。   Therefore, in the seismic reinforcement method (building seismic reinforcement structure A) of the building of this embodiment, the brace unit 5 in which the upper beam material 2 and the reinforcing brace 1 are unitized is disposed in the building frame. By bolting both ends of the upper beam member 2 to the pillars 6, the reinforcing brace 1 can be accurately arranged at a predetermined position.

これにより、補強ブレース１をそれぞれ所定位置に配設してボルト接合する従来と比較し、補強ブレース１の建方精度の向上を図ることができ、ボルト孔合わせによるプレート変形等の不都合が生じることを回避できる。   This makes it possible to improve the construction accuracy of the reinforcing brace 1 and to cause inconveniences such as plate deformation due to bolt hole alignment, as compared with the conventional case where the reinforcing brace 1 is disposed at a predetermined position and bolted. Can be avoided.

また、効率的に補強ブレース１を設置できるため、現場労務費削減によるコストダウンを図ることができるとともに、補剛部材１０の数量の削減、補剛部材の省略を図ることも可能になる。   In addition, since the reinforcing brace 1 can be installed efficiently, it is possible to reduce costs by reducing labor costs at the site, and it is possible to reduce the number of the stiffening members 10 and omit the stiffening members.

さらに、現場労務省力化による工期短縮を図ることができ、また、現場労務省力化による安全性向上を図ることも可能になる。   Furthermore, the construction period can be shortened by labor saving on-site labor, and safety can be improved by labor saving on-site labor.

また、補剛部材１０を設けることも工場製作で容易なため、補剛部材１０によるブレース断面の有効活用による鉄骨数量削減も期待できる。   In addition, since it is easy to provide the stiffening member 10 at the factory, a reduction in the number of steel frames can be expected by effectively utilizing the brace cross section of the stiffening member 10.

以上、本発明に係る建物の耐震補強工法の一実施形態について説明したが、本発明は上記の一実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。   As mentioned above, although one embodiment of the earthquake-proof reinforcement method of the building concerning the present invention was described, the present invention is not limited to the above-mentioned one embodiment, and can be suitably changed in the range which does not deviate from the meaning.

例えば、ブレースユニット５は、上部鉄骨梁２と一対の補強ブレース１で略Ｋ型にして構成してもよい。この場合には、ブレースユニット５を架構面内に設置し、上部鉄骨梁２の両端部を柱６にボルト接合した後、適宜手段を用いて補強ブレース１の下端部を下部梁８及び／又は柱６に接続すればよい。そして、このように構成しても本実施形態と同様の作用効果を得ることが可能である。   For example, the brace unit 5 may be formed in a substantially K shape by the upper steel beam 2 and the pair of reinforcing braces 1. In this case, the brace unit 5 is installed in the frame surface, both ends of the upper steel beam 2 are bolted to the column 6, and then the lower end of the reinforcing brace 1 is attached to the lower beam 8 and / or using appropriate means. What is necessary is just to connect to the pillar 6. And even if comprised in this way, it is possible to obtain the same effect as this embodiment.

１ 補強ブレース（鉄骨ブレース）
２ 上梁材（上部鉄骨梁）
３ 枠体
３ａ 縦材
３ｂ 横材
４ ガセットプレート
５ ブレースユニット
６ 柱
７ 床コンクリート
８ 下部梁
９ スタッド
１０ 補剛部材
Ａ 耐震補強構造 1 Reinforced brace (steel brace)
2 Upper beam material (upper steel beam)
3 Frame 3a Vertical member 3b Cross member 4 Gusset plate 5 Brace unit 6 Column 7 Floor concrete 8 Lower beam 9 Stud 10 Stiffening member A Seismic reinforcement structure

Claims (1)

逆Ｖ型に配設される一対の補強ブレースの上端部を上部鉄骨梁に接続するとともに、一対の縦材の下端部に横材を接続した枠体を、前記一対の縦材の上端部を前記上部鉄骨梁の両端部側にそれぞれ接続し、且つ前記一対の補強ブレースの下端部をそれぞれ前記枠体に接続してブレースユニットを形成するブレースユニット形成工程と、
一対の柱と下部梁が施工された状態で、前記ブレースユニットを前記一対の柱の間の架構面内に配設し、前記上部鉄骨梁の両端部を前記柱にボルト接合して建物の大梁として構成するとともに、床コンクリートを打設することで、前記横材を前記下部梁と一体化させるブレースユニット接合工程とを備えることを特徴とする建物の耐震補強工法。 The upper end of a pair of reinforcing braces arranged in an inverted V shape is connected to the upper steel beam, and a frame body in which a cross member is connected to the lower end of the pair of longitudinal members is connected to the upper end of the pair of longitudinal members. respectively connected to both ends of the upper steel beam, a brace unit forming step of forming a brace unit and to connect the lower ends of the pair of the reinforcing brace to each of the frame body,
In a state where the pair of columns and the lower beam is construction, arranged said brace unit in rack Plane between the pair of pillars, buildings both ends of the upper steel beams and bolted to the column girder together configured as, by pouring the floor concrete, seismic Retrofit for buildings, characterized in that it comprises a brace unit bonding step of the cross member integral with the lower beam.
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