JP2015161148A - Buckling restraining brace joint structure - Google Patents

Buckling restraining brace joint structure Download PDF

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JP2015161148A
JP2015161148A JP2014038333A JP2014038333A JP2015161148A JP 2015161148 A JP2015161148 A JP 2015161148A JP 2014038333 A JP2014038333 A JP 2014038333A JP 2014038333 A JP2014038333 A JP 2014038333A JP 2015161148 A JP2015161148 A JP 2015161148A
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brace
joint
buckling
column
core
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JP6359288B2 (en
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清香 辻井
Kiyoka Tsujii
清香 辻井
大藏 川村
Taizo Kawamura
大藏 川村
吉田　文久
Fumihisa Yoshida
文久 吉田
拓馬 西
Takuma Nishi
拓馬 西
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Daiwa House Industry Co Ltd
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Daiwa House Industry Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a buckling restraining brace joint structure that enables a brace core of a buckling restraining brace to correspond to a structural core of a structural skeleton, without complication of detailing of a column-beam-brace joint.SOLUTION: In a buckling restraining brace joint structure, a buckling restraining brace 20 is joined to a brace joint metal 3 that is joined to a steel column 1 and a steel beam 2. A joint between the steel column 1 and the steel beam 2, which is a corner part for joining the buckling restraining brace 20, is pin-joined in such a manner that the beam 2 is bolt-joined to a gusset plate 4 protruding from the column 1. An intersection point, at which a brace core of the buckling restraining brace 20 and a column core of the column 1 cross each other, corresponds to an intersection point at which the column core and a beam core cross each other.

Description

この発明は、住宅、集合住宅、その他の鉄骨造建物における座屈拘束ブレースの接合構造に関する。   The present invention relates to a joint structure of a buckling-restrained brace in a house, an apartment house, or other steel structure building.

従来、座屈拘束ブレースのように圧縮力と引張力を負担するブレースを構造躯体へ接合する場合、鉄骨製の柱と梁とのピン接合部に座屈拘束ブレースが交差するため、梁端部のボルト接合位置を、柱芯から大きく偏芯させている。また、座屈拘束ブレースは圧縮側にも作用するため、その構造躯体への接合部分は、補強のために複雑な構造となっている。   Conventionally, when a brace that bears compressive force and tensile force, such as a buckling-restrained brace, is joined to the structural frame, the buckling-restraining brace intersects the pin joint between the steel column and the beam. The bolt joint position is greatly decentered from the column core. Further, since the buckling-restraining brace also acts on the compression side, the joint portion to the structural housing has a complicated structure for reinforcement.

特許第０４０４４４８３号公報Japanese Patent No. 04044483 特開平１０−２６６３３７号公報Japanese Patent Laid-Open No. 10-266337 特開２０１０−２８１１６５号公報JP 2010-281165 A 特開２０１２−１７２４９０号公報JP 2012-172490 A

一般的に、構造躯体への影響を考慮すると、できるだけ構造芯から偏芯することなく各部材を接合することが望ましい。
また、座屈拘束ブレースは、引張力だけでなく圧縮力も負担するため、柱・梁への接合部に通常のガセットプレートで座屈拘束ブレースを接合すると、面外方向への座屈が生じる可能性がある。これを防止するためには、リブプレート等の補強プレートが必要になり、柱・梁・ブレース接合部の納まりが複雑になる。特に、両方向ブレース架構の場合、梁端部のボルト接合位置を大きく偏芯させる上記従来の技術では、柱サイズをアップする必要性が生じる場合がある。 In general, in consideration of the influence on the structural housing, it is desirable to join the members without decentering from the structural core as much as possible.
In addition, the buckling-restrained brace bears not only the tensile force but also the compressive force, so if a buckling-restraining brace is joined to the joint to the column / beam with a normal gusset plate, buckling may occur in the out-of-plane direction. There is sex. In order to prevent this, a reinforcing plate such as a rib plate is required, and the accommodation of the column / beam / brace joint is complicated. In particular, in the case of a bi-directional brace frame, there is a case where it is necessary to increase the column size in the above-described conventional technique in which the bolt joint position at the beam end is greatly decentered.

この発明の目的は、柱・梁・ブレースの接合部の納まりが複雑になることなく、座屈拘束ブレースのブレース芯を構造躯体の構造芯に一致させることができる座屈拘束ブレースの接合構造を提供することである。   An object of the present invention is to provide a buckling-restrained brace joint structure in which the brace core of the buckling-restrained brace can be matched with the structural core of the structure without complicating the fitting of the joints of the columns, beams, and braces. Is to provide.

この発明の座屈拘束ブレースの接合構造は、鉄骨製の柱および梁に接合されたブレース接合金物に座屈拘束ブレースを接合した座屈拘束ブレースの接合構造において、
前記座屈拘束ブレースを接合する角部となる鉄骨製の柱と梁との接合部を、前記柱から突出させたガセットプレートに前記梁をボルト接合するピン接合とし、前記座屈拘束ブレースのブレース芯と前記柱の柱芯とが交わる交点を、前記柱芯と前記梁の梁芯とが交わる交点に一致させたことを特徴とする。 The joint structure of the buckling restraint brace of the present invention is a joint structure of a buckling restraint brace in which a buckle restraint brace is joined to a brace joint hardware joined to a steel column and beam.
A brace of the buckling restrained brace is a joint between a steel column and a beam that serves as a corner for joining the buckling restrained brace and a pin joint that bolts the beam to a gusset plate protruding from the pillar. The intersection of the core and the column core of the column is made to coincide with the intersection of the column core and the beam core of the beam.

この構成では、座屈拘束ブレースを接合する角部となる柱と梁との接合部をピン接合としているが、柱からガセットプレートを持ち出して梁端部のボルト接合位置をずらせることにより、柱・梁のボルト接合部分に妨げられることなく、座屈拘束ブレースのブレース芯と柱の柱芯とが交わる交点を、柱芯と梁芯とが交わる交点に一致させることを可能としている。これにより、柱・梁・ブレース接合部の納まりが複雑になることなく、座屈拘束ブレースのブレース芯を構造躯体の構造芯に一致させることができる。   In this configuration, the junction between the column and the beam, which is the corner to join the buckling-restrained brace, is a pin connection, but by pulling the gusset plate out of the column and shifting the bolt connection position at the beam end, -It is possible to match the intersection where the brace core of the buckling restrained brace and the column core of the column intersect with the intersection where the column core and the beam core intersect without being obstructed by the bolt joint portion of the beam. This makes it possible to match the brace core of the buckling-restrained brace with the structural core of the structural frame without complicating the accommodation of the column / beam / brace joint.

この発明において、前記ガセットプレートに、前記座屈拘束ブレースの傾斜に沿って傾斜した補強プレートを設けても良い。
上記のように柱から突出させたガセットプレートに梁をボルト接合する接合構造では、梁端部のせん断力は柱芯から偏芯して作用することになり、その作用の影響は柱の断面算定において適切に評価する必要がある。しかし、前記ガセットプレートに、前記座屈拘束ブレースの傾斜に沿って傾斜した補強プレートを設けた場合、一般的な構成である垂直に補強プレートを設ける構成に比べて、ガセットプレートの突出量を少なくできる。つまり梁の接合部の柱からの距離をできるだけ小さくできる。そのため、前記偏芯に伴う付加曲げモーメントを極小化することができて、柱のサイズアップを回避することができる。 In the present invention, the gusset plate may be provided with a reinforcing plate inclined along the inclination of the buckling restraint brace.
In the joint structure in which the beam is bolted to the gusset plate protruding from the column as described above, the shearing force at the beam end acts eccentrically from the column core, and the effect of this effect is the calculation of the column cross section. It is necessary to evaluate appropriately. However, when a reinforcing plate inclined along the inclination of the buckling-restraining brace is provided on the gusset plate, the amount of protrusion of the gusset plate is smaller than that of a general configuration in which a reinforcing plate is provided vertically. it can. That is, the distance from the column of the joint portion of the beam can be made as small as possible. Therefore, the additional bending moment accompanying the eccentricity can be minimized, and an increase in the size of the column can be avoided.

この発明において、前記ブレース接合金物は、前記座屈拘束ブレースの傾斜方向に沿って延びかつウェブおよびフランジを有する断面形状の傾斜ブレース接合部を有し、前記座屈拘束ブレースは端部に断面がＨ形のＨ形接合部を有し、前記ブレース接合金物の傾斜ブレース接合部と前記座屈拘束ブレースのＨ形接合部との接合を、前記傾斜ブレース接合部のフランジとＨ形接合部のフランジとでは行わず両接合部のウェブのみでの接合とし、その接合に前記両ウェブに跨がって配置されるスプライスプレートを用い、このスプライスプレートが補強リブを有するものとしても良い。
この構成の場合、前記スプライスプレートが補強リブを有することで、座屈拘束ブレースの接合部における面外座屈に対する補強効果を上げることができる。 In this invention, the brace joint hardware has an inclined brace joint portion having a cross-sectional shape extending along the inclination direction of the buckling restraint brace and having a web and a flange, and the buckling restraint brace has a cross section at an end portion. An H-shaped H-shaped joint is provided, and the slanted brace joint of the brace joint hardware and the H-shaped joint of the buckling-restrained brace are joined together by a flange of the slanted brace joint and a flange of the H-shaped joint. It is also possible to use a splice plate disposed across the two webs for the joining, and this splice plate may have reinforcing ribs.
In the case of this configuration, since the splice plate has the reinforcing rib, it is possible to increase the reinforcing effect against the out-of-plane buckling at the joint portion of the buckling restrained brace.

この発明において、前記梁が前記柱よりも幅広であって、前記ガセットプレートが上下端に補強プレートを有する断面Ｈ形とされ、前記補強プレートの幅が前記梁の幅よりも狭いものとしても良い。
ブレースに圧縮方向および引張方向の両方向の荷重を負担させる両方向ブレース架構の場合、柱サイズよりも梁幅寸法が大きくなる箇所がある。このように梁幅寸法が大きい場合でも、通常ではガセットプレートの補強プレートを梁幅寸法と同幅とするため、ガセットプレートの柱への溶接が難しくなり、手間がかかる。しかし、上記のように梁が柱よりも幅広であって、前記ガセットプレートが上下端に補強プレートを有する断面Ｈ形とされていても、前記補強プレートの幅を前記梁の幅よりも狭く、例えば柱と同寸法とすることにより、ガセットプレートの柱への溶接を容易に行うことができる。 In this invention, the beam may be wider than the column, the gusset plate may have a cross-sectional H shape having reinforcing plates at upper and lower ends, and the width of the reinforcing plate may be narrower than the width of the beam. .
In the case of a bi-directional brace frame in which the brace bears loads in both the compressive direction and the tensile direction, there are places where the beam width dimension is larger than the column size. Even when the beam width dimension is large as described above, since the reinforcing plate of the gusset plate is usually set to the same width as the beam width dimension, it becomes difficult to weld the column of the gusset plate to the column. However, even if the beam is wider than the column as described above, and the gusset plate has a cross-sectional H shape having reinforcing plates at the upper and lower ends, the width of the reinforcing plate is narrower than the width of the beam, For example, by setting the same dimensions as the pillar, welding of the gusset plate to the pillar can be easily performed.

この発明の座屈拘束ブレースの接合構造は、鉄骨製の柱および梁に接合されたブレース接合金物に座屈拘束ブレースを接合した座屈拘束ブレースの接合構造において、前記座屈拘束ブレースを接合する角部となる鉄骨製の柱と梁との接合部を、前記柱から突出させたガセットプレートに前記梁をボルト接合するピン接合とし、前記座屈拘束ブレースのブレース芯と前記柱の柱芯とが交わる交点を、前記柱芯と前記梁の梁芯とが交わる交点に一致させたため、柱・梁・ブレース接合部の納まりが複雑になることなく、座屈拘束ブレースのブレース芯を構造躯体の構造芯に一致させることができる。   The buckling restrained brace joining structure of the present invention is the buckling restrained brace joining structure in which the buckling restrained brace is joined to the brace joint hardware joined to the steel column and beam. The joint between the steel column and the beam, which is a corner, is a pin joint that bolts the beam to a gusset plate protruding from the column, and the brace core of the buckling-restrained brace and the column core of the column Since the intersection point of the column and the beam core of the beam intersects with each other, the brace core of the buckling-restrained brace is attached to the structural frame without complicating the fitting of the column / beam / brace joint. Can match the structure core.

この発明の一実施形態に係る座屈拘束ブレースの接合構造の斜視図である。It is a perspective view of the junction structure of a buckling restraint brace concerning one embodiment of this invention. 図１における柱・梁接合部の水平断面図である。FIG. 2 is a horizontal sectional view of a column / beam joint in FIG. 1. （Ａ）は同接合構造を適用した構造躯体の部分正面図、（Ｂ）は同部分平面図である。(A) is the partial front view of the structural housing to which the joining structure is applied, (B) is the partial plan view. 同接合構造を適用した他の構造躯体の一例の部分正面図である。It is a partial front view of an example of the other structural housing to which the joint structure is applied. （Ａ）は同接合構造におけるブレース接合部の正面図、（Ｂ）は（Ａ）におけるａ−ａ’矢視平面図である。(A) is a front view of the brace joint part in the joint structure, and (B) is a plan view taken along the a-a ′ arrow in (A). （Ａ）は図５（Ａ）におけるｂ−ｂ’矢視断面図、（Ｂ）はｃ−ｃ’矢視断面図、（Ｃ）はｄ−ｄ’矢視断面図である。5A is a cross-sectional view taken along the line b-b ′ in FIG. 5A, FIG. 5B is a cross-sectional view taken along the line c-c ′, and FIG. 5C is a cross-sectional view taken along the line d-d ′. （Ａ）は座屈拘束ブレースにおける芯材の平面図、（Ｂ）は同芯材の側面図、（Ｃ）は同座屈拘束ブレースにおける幅方向補鋼材の平面図、（Ｄ）は同座屈拘束ブレースにおける拘束材の正面図、（Ｅ）は同拘束材の断面図である。(A) is a plan view of the core material in the buckling restraint brace, (B) is a side view of the core material, (C) is a plan view of the width direction reinforcing steel material in the buckling restraint brace, and (D) is the seat. The front view of the restraint material in a bending restraint brace, (E) is sectional drawing of the restraint material.

この発明の一実施形態を図１ないし図７と共に説明する。この座屈拘束ブレースの接合構造は、図１に斜視図で示すように、鉄骨製の柱１および梁２に接合されたブレース接合金物３に、傾斜した姿勢の座屈拘束ブレース２０を接合した接合構造である。   An embodiment of the present invention will be described with reference to FIGS. As shown in the perspective view of FIG. 1, the buckling-restrained brace joining structure is formed by joining a buckling-restraining brace 20 in an inclined posture to a brace joint hardware 3 joined to a steel column 1 and a beam 2. It is a junction structure.

図３（Ａ）は、この接合構造を適用した鉄骨造建物の構造躯体の部分正面図を示し、図３（Ｂ）はその平面図を示す。前記鉄骨造建物は、例えば低層の複数階の集合住宅である。この構造躯体では、一対の座屈拘束ブレース２０，２０がハ字形に配置され、各座屈拘束ブレース２０の下端が前記ブレース接合金物３に接合され、各座屈拘束ブレース２０の上端は梁２の中間部分に接合されている。なお、図４のように一対の座屈拘束ブレース２０，２０が逆ハ字形に配置され、各座屈拘束ブレース２０の上端が前記ブレース接合金物３に接合された構造躯体であっても、図１の実施形態とは上下逆向きの構成とすることで適用できる。   FIG. 3A shows a partial front view of a structural frame of a steel building to which this joining structure is applied, and FIG. 3B shows a plan view thereof. The steel structure building is, for example, a low-rise multi-storey apartment house. In this structural housing, a pair of buckling restraint braces 20 and 20 are arranged in a C shape, and the lower end of each buckling restraint brace 20 is joined to the brace fitting 3, and the upper end of each buckling restraint brace 20 is the beam 2. It is joined to the middle part. In addition, even if it is a structural housing | casing by which a pair of buckling restraint braces 20 and 20 are arrange | positioned in reverse C shape like FIG. 4, and the upper end of each buckling restraint brace 20 was joined to the said brace joining metal fitting 3, The first embodiment can be applied by adopting a configuration that is upside down.

図１において、座屈拘束ブレース２０を接合する角部となる鉄骨製の柱１と梁２との接合部は、柱１から突出させたガセットプレート４に梁２をボルト５で接合するピン接合とされている。ガセットプレート４は、柱１に対してはその側面に溶接で接合されている。前記ブレース接合金物３も、柱１に溶接で接合されている。なお、前記ガセットプレート４と前記ブレース接合金物３とは、製造過程では別部品であるが、互いに溶接された組合せ部品であり、その組合せ部品が前記柱１に溶接により接合される。   In FIG. 1, a joint portion between a steel column 1 and a beam 2 that serves as a corner portion for joining a buckling-restraining brace 20 is a pin joint in which the beam 2 is joined to a gusset plate 4 projecting from the column 1 with a bolt 5. It is said that. The gusset plate 4 is joined to the side of the column 1 by welding. The brace fitting 3 is also joined to the column 1 by welding. The gusset plate 4 and the brace fitting 3 are separate parts in the manufacturing process, but are combined parts welded to each other, and the combined parts are joined to the column 1 by welding.

座屈拘束ブレース２０のブレース芯と柱１の柱芯とが交わる交点は、前記柱芯と梁２の梁芯とが交わる交点に一致させてある。柱１は角形鋼管からなり、梁２はＨ形鋼を上下にフランジ部が位置するように設置している。また、図２に水平断面図で示すように、梁２は柱１よりも幅広とされている。   The intersection point where the brace core of the buckling restraint brace 20 and the column core of the column 1 intersect is made to coincide with the intersection point where the column core and the beam core of the beam 2 intersect. The column 1 is formed of a square steel pipe, and the beam 2 is installed with an H-shaped steel so that the flange portion is positioned up and down. As shown in a horizontal sectional view in FIG. 2, the beam 2 is wider than the column 1.

前記ガセットプレート４は、上下端に補強プレート４ａ，４ａを有する断面Ｈ形とされ、図２のように補強プレート４ａの幅は前記梁２の幅よりも狭く設定されている。具体的には、補強プレート４ａの幅は前記柱１とほぼ同じ幅に設定されている。ガセットプレート４への梁２のボルト接合は、ガセットプレート４のウェブ４ｂから梁２のウェブ２ｂに跨がり、これら両ウェブ４ｂ，２ｂを両面側から挟み付ける一対のスプライスプレート６を配置し、これら両スプライスプレート６と前記各ウェブ４ｂ，２ｂとを貫通する複数のボルト５で両ウェブ４ｂ，２ｂを接合することでなされている。また、ガセットプレート４のウェブ４ｂの両面には、前記座屈拘束ブレース２０の傾斜に沿って傾斜した補強プレート７が溶接により設けられている。   The gusset plate 4 has an H-shaped cross section having reinforcing plates 4a and 4a at the upper and lower ends, and the width of the reinforcing plate 4a is set narrower than the width of the beam 2 as shown in FIG. Specifically, the width of the reinforcing plate 4a is set to be substantially the same as that of the pillar 1. The bolt 2 of the beam 2 to the gusset plate 4 extends from the web 4b of the gusset plate 4 to the web 2b of the beam 2, and a pair of splice plates 6 that sandwich the webs 4b and 2b from both sides are disposed. The two webs 4b and 2b are joined by a plurality of bolts 5 penetrating both the splice plates 6 and the webs 4b and 2b. Further, on both surfaces of the web 4 b of the gusset plate 4, reinforcing plates 7 inclined along the inclination of the buckling restrained brace 20 are provided by welding.

前記ブレース接合金物３は、前記座屈拘束ブレース２０の傾斜方向に沿って延びる傾斜ブレース接合部８を有する。傾斜ブレース接合部８は、図１ではウェブ８ａとその下側のフランジ８ａとでなる逆Ｔ形断面とされているが、図５（Ａ）のようにウェブ８ｂの上下にフランジ８ａを有するＨ形断面であっても良い。   The brace joint hardware 3 has an inclined brace joint portion 8 extending along the inclination direction of the buckling restrained brace 20. In FIG. 1, the inclined brace joint 8 has an inverted T-shaped cross section composed of a web 8a and a flange 8a below the web 8a. However, as shown in FIG. It may have a cross section.

図５（Ａ）は、前記傾斜ブレース接合部８と前記座屈拘束ブレース２０との接合部の正面図を示し、図５（Ｂ）は図５（Ａ）におけるａ−ａ’矢視平面図を示す。座屈拘束ブレース２０の端部には、断面形状Ｈ形のＨ形接合部２５が形成されている。ブレース接合金物３側の傾斜ブレース接合部８と座屈拘束ブレース２０との接合は、ブレース接合金物３側の傾斜ブレース接合部８のフランジ８ａと、座屈拘束ブレース２０側のＨ形接合部２５のフランジとは接合せず、前記傾斜ブレース接合部８のウェブ８ｂと、前記Ｈ形接合部２５のウェブ２５ｂとの間でのみの接合とされている。   5A shows a front view of the joint between the inclined brace joint 8 and the buckling restrained brace 20, and FIG. 5B is a plan view taken along the line aa ′ in FIG. 5A. Indicates. At the end of the buckling restrained brace 20, an H-shaped joint 25 having an H-shaped cross section is formed. The inclined brace joint 8 on the side of the brace joint 3 and the buckling restrained brace 20 are joined to the flange 8a of the inclined brace joint 8 on the brace joint 3 side and the H-shaped joint 25 on the buckling restraint brace 20 side. The flange 8 is not joined, and is joined only between the web 8b of the inclined brace joint 8 and the web 25b of the H-shaped joint 25.

すなわち、傾斜ブレース接合部８のウェブ８ｂからＨ形接合部２５のウェブ２５ｂに跨がり、これら両ウェブ８ｂ，２５ｂを両面側から挟み付ける一対のスプライスプレート９，９を配置し、これら両スプライスプレート９と前記各ウェブ８ｂ，２５ｂとを貫通する複数のボルト１０で両ウェブ８ｂ，２５ｂを接合することで、前記傾斜ブレース接合部８のウェブ８ｂと、前記Ｈ形接合部２５のウェブ２５ｂとが接合されている。前記スプライスプレート９は、座屈拘束ブレース２０の傾斜方向に延びる補強リブ９ａを有し、全体の断面がＴ形とされている。このように、ブレース接合金物３側の傾斜ブレース接合部８と座屈拘束ブレース２０とを接合するスプライスプレート９に、座屈拘束ブレース２０の傾斜方向に延びる補強リブ９ａを設けることで、座屈拘束ブレース２０の座屈に対する補強効果を上げることができる。   That is, a pair of splice plates 9 and 9 are disposed to extend from the web 8b of the inclined brace joint 8 to the web 25b of the H-shaped joint 25 and sandwich the webs 8b and 25b from both sides. 9 and the webs 8b and 25b are joined to each other with a plurality of bolts 10 passing through the webs 8b and 25b, whereby the web 8b of the inclined brace joint 8 and the web 25b of the H-shaped joint 25 are obtained. It is joined. The splice plate 9 has reinforcing ribs 9a extending in the inclination direction of the buckling restrained brace 20, and the entire cross section is T-shaped. As described above, the reinforcing rib 9a extending in the inclination direction of the buckling restrained brace 20 is provided on the splice plate 9 that joins the inclined brace joint 8 and the buckling restraining brace 20 on the brace joint metal 3 side, thereby buckling. The reinforcement effect with respect to the buckling of the restraining brace 20 can be increased.

図６（Ａ），（Ｂ），（Ｃ）は、図５（Ａ）におけるｂ−ｂ’矢視断面図、ｃ−ｃ’矢視断面図、およびｄ−ｄ’矢視断面図を示す。座屈拘束ブレース２０は、図７（Ａ），（Ｂ），（Ｃ），（Ｄ），（Ｅ）に示すように、板状の芯材２１と、この芯材２１の両面に沿って対向配置した一対の拘束材２２，２２とを有する。拘束材２２は角形鋼管で構成される。拘束材２２の角形鋼管内にはコンクリート等の硬化性の充填材が充填されていても良い。芯材２１の両端部は前記Ｈ形接合部２５のウェブ２５ｂとなる拡幅部とされ、その拡幅部の両辺に前記Ｈ形接合部２５のフランジとなる補強プレート２６が設けられている。芯材２１の両面の長手方向中間部には拘束材ずれ止め用の突起２４が設けられ、拘束材２２の長手方向中間部には前記突起２４に係合する係合孔２８が設けられる。一対の拘束材２２，２２の上下端間は、図６（Ｃ）のようにブレース長手方向に延びる幅方向補鋼材２３で連結されている。その幅方向補鋼材２３の平面図を図７（Ｃ）に示す。座屈拘束ブレース２０のＨ形接合部２５には、図６（Ｂ）のように、フランジとなる両補強プレート２６間に跨がる別の補強プレート２７が接合されている。   6A, 6B, and 6C show a cross-sectional view taken along the line bb ′, a cross-sectional view taken along the line cc ′, and a cross-sectional view taken along the line dd ′ in FIG. . As shown in FIGS. 7A, 7B, 7C, 7D, the buckling-restraining brace 20 is formed along a plate-shaped core material 21 and both surfaces of the core material 21. It has a pair of constraining materials 22 and 22 arranged opposite to each other. The restraining material 22 is composed of a square steel pipe. The rectangular steel pipe of the restraining material 22 may be filled with a curable filler such as concrete. Both end portions of the core material 21 are widened portions that become the webs 25b of the H-shaped joint portion 25, and reinforcing plates 26 that serve as flanges of the H-shaped joint portion 25 are provided on both sides of the widened portion. Protrusions 24 for restraining displacement of the restraining material 22 are provided in the longitudinal intermediate portions of both surfaces of the core material 21, and engaging holes 28 for engaging the projections 24 are provided in the longitudinal intermediate portion of the restraining material 22. The upper and lower ends of the pair of restraining materials 22, 22 are connected by a width direction reinforcing steel material 23 extending in the brace longitudinal direction as shown in FIG. 6C. A plan view of the width direction reinforcing steel member 23 is shown in FIG. As shown in FIG. 6B, another reinforcing plate 27 straddling between both reinforcing plates 26 serving as a flange is joined to the H-shaped joint portion 25 of the buckling restrained brace 20.

この構成の座屈拘束ブレースの接合構造によると、座屈拘束ブレース２０を接合する角部となる鉄骨製の柱１と梁２とをボルト接合によるピン接合としているが、柱１からガセットプレート４を持ち出し、このガセットプレート４に梁２をボルト接合することで、梁端部のボルト接合位置を柱芯から離している。これにより、柱・梁のボルト接合部分に妨げられることなく、座屈拘束ブレース２０のブレース芯と柱１の柱芯とが交わる交点を、柱芯と梁芯とが交わる交点に一致させている。このため、柱１・梁２・ブレース接合金物３の納まりが複雑になることなく、座屈拘束ブレース２０のブレース芯を構造躯体の構造芯に一致させることができる。   According to the joining structure of the buckling restrained brace having this configuration, the steel column 1 and the beam 2 which are the corners to join the buckling restrained brace 20 are pin joined by bolt joining. , And the beam 2 is bolted to the gusset plate 4 so that the bolted position at the beam end is separated from the column core. Thereby, the intersection where the brace core of the buckling restraint brace 20 and the column core of the column 1 intersect is made coincident with the intersection where the column core and the beam core intersect without being hindered by the bolt joint portion of the column / beam. . For this reason, the brace core of the buckling-restraining brace 20 can be made to coincide with the structural core of the structural frame without complicating the accommodation of the column 1, the beam 2, and the brace joint hardware 3.

この発明の接合構造では、梁端部のせん断力は柱芯から偏芯して作用することになるが、その作用の影響は柱１の断面に左右される。この実施形態では、ガセットプレート４に、座屈拘束ブレース２０の傾斜に沿って傾斜した補強プレート７を設けているので、ガセットプレート４の突出量を少なくして、つまり梁２の接合部の柱１からの距離をできるだけ小さくして、前記偏芯に伴う付加曲げモーメントを極小化することができ、柱１のサイズアップを回避することができる。   In the joint structure according to the present invention, the shearing force at the beam end acts eccentrically from the column core, but the effect of the effect depends on the cross section of the column 1. In this embodiment, the gusset plate 4 is provided with the reinforcing plate 7 that is inclined along the inclination of the buckling-restraining brace 20, so that the protruding amount of the gusset plate 4 is reduced, that is, the column of the joint portion of the beam 2. By reducing the distance from 1 as much as possible, the additional bending moment accompanying the eccentricity can be minimized, and an increase in the size of the column 1 can be avoided.

圧縮方向および引張方向の両方向の荷重をブレースに負担させる両方向ブレース架構の場合、柱サイズよりも梁幅寸法が大きくなる箇所があるが、この実施形態では上記したように梁２が柱１よりも幅広であって、ガセットプレート４が上下端に補強プレート４ａを有する断面Ｈ形とされ、補強プレート４ａの幅が梁２の幅よりも狭く、例えば柱１とほぼ同寸法とされているので、ガセットプレート４の柱１への溶接を容易に行うことができる。   In the case of a two-way braced frame in which a load in both the compression direction and the tensile direction is applied to the brace, there are places where the beam width dimension is larger than the column size. In this embodiment, the beam 2 is larger than the column 1 as described above. Since it is wide and the gusset plate 4 has a cross-sectional H shape with reinforcing plates 4a at the upper and lower ends, the width of the reinforcing plate 4a is narrower than the width of the beam 2, for example, approximately the same dimensions as the pillar 1, It is possible to easily weld the gusset plate 4 to the column 1.

１…柱
２…梁
３…ブレース接合金物
４…ガセットプレート
４ａ…補強プレート
４ｂ…ウェブ
５…ボルト
７…傾斜した補強プレート
８…傾斜ブレース接合部
８ｂ…ウェブ
９…スプライスプレート
９ａ…補強リブ
２０…座屈拘束ブレース
２５…Ｈ形接合部
２５ｂ…ウェブ DESCRIPTION OF SYMBOLS 1 ... Column 2 ... Beam 3 ... Brace metal fitting 4 ... Gusset plate 4a ... Reinforcement plate 4b ... Web 5 ... Bolt 7 ... Inclined reinforcement plate 8 ... Inclined brace junction 8b ... Web 9 ... Splice plate 9a ... Reinforcement rib 20 ... Buckling restrained brace 25 ... H-shaped joint 25b ... Web

Claims (4)

鉄骨製の柱および梁に接合されたブレース接合金物に座屈拘束ブレースを接合した座屈拘束ブレースの接合構造において、
前記座屈拘束ブレースを接合する角部となる鉄骨製の柱と梁との接合部を、前記柱から突出させたガセットプレートに前記梁をボルト接合するピン接合とし、前記座屈拘束ブレースのブレース芯と前記柱の柱芯とが交わる交点を、前記柱芯と前記梁の梁芯とが交わる交点に一致させたことを特徴とする座屈拘束ブレースの接合構造。 In the junction structure of buckling-restrained braces where a brace-restraining brace is joined to a brace joint hardware joined to a steel column and beam,
A brace of the buckling restrained brace is a joint between a steel column and a beam that serves as a corner for joining the buckling restrained brace and a pin joint that bolts the beam to a gusset plate protruding from the pillar. A junction structure for a buckling-restrained brace, characterized in that an intersection point between a core and a column core of the column is made to coincide with an intersection point between the column core and a beam core of the beam. 請求項１に記載の座屈拘束ブレースの接合構造において、前記ガセットプレートに、前記座屈拘束ブレースの傾斜に沿って傾斜した補強プレートを設けた座屈拘束ブレースの接合構造。   The joint structure of the buckling restraint brace according to claim 1, wherein the gusset plate is provided with a reinforcing plate that is inclined along the slope of the buckle restraint brace. 請求項１または請求項２に記載の座屈拘束ブレースの接合構造において、前記ブレース接合金物は、前記座屈拘束ブレースの傾斜方向に沿って延びかつウェブおよびフランジを有する断面形状の傾斜ブレース接合部を有し、前記座屈拘束ブレースは端部に断面がＨ形のＨ形接合部を有し、前記ブレース接合金物の傾斜ブレース接合部と前記座屈拘束ブレースのＨ形接合部との接合を、前記傾斜ブレース接合部のフランジとＨ形接合部のフランジとでは行わず両接合部のウェブのみでの接合とし、その接合に前記両ウェブに跨がって配置されるスプライスプレートを用い、このスプライスプレートが補強リブを有するものとした座屈拘束ブレースの接合構造。   3. The buckling constrained brace joint structure according to claim 1, wherein the brace joint hardware extends along an inclination direction of the buckling constrained brace and has a cross-sectional shape having a web and a flange. The buckling-restraining brace has an H-shaped joint having an H-shaped cross section at an end, and joins the inclined brace joint of the brace joint hardware and the H-joint of the buckling-restrained brace. The flange of the inclined brace joint and the flange of the H-shaped joint are not joined with only the webs of both joints, and a splice plate disposed across the two webs is used for the joint. Bonding structure of buckling restrained brace in which splice plate has reinforcing ribs. 請求項１ないし請求項３のいずれか１項に記載の座屈拘束ブレースの接合構造において、前記梁が前記柱よりも幅広であって、前記ガセットプレートが上下端に補強プレートを有する断面Ｈ形とされ、前記補強プレートの幅が前記梁の幅よりも狭い座屈拘束ブレースの接合構造。   The junction structure of the buckling restrained brace according to any one of claims 1 to 3, wherein the beam is wider than the column, and the gusset plate has reinforcing plates at upper and lower ends. And a buckling-restrained brace joint structure in which the width of the reinforcing plate is narrower than the width of the beam.
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CN107338870A (en) * 2017-08-28 2017-11-10 北京堡瑞思减震科技有限公司 A kind of function with the support of Self-resetting armpit can recover steel-frame structure
CN109339224A (en) * 2018-12-05 2019-02-15 北京中外建建筑设计有限公司 A kind of support node
CN111794521A (en) * 2020-06-11 2020-10-20 中国华冶科工集团有限公司 Method for mounting beam steel bars at embedded part of buckling restrained brace

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CN111794521A (en) * 2020-06-11 2020-10-20 中国华冶科工集团有限公司 Method for mounting beam steel bars at embedded part of buckling restrained brace

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