JP2008150842A - Buckling restricting brace - Google Patents

Buckling restricting brace Download PDF

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JP2008150842A
JP2008150842A JP2006339350A JP2006339350A JP2008150842A JP 2008150842 A JP2008150842 A JP 2008150842A JP 2006339350 A JP2006339350 A JP 2006339350A JP 2006339350 A JP2006339350 A JP 2006339350A JP 2008150842 A JP2008150842 A JP 2008150842A
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buckling
core material
brace
core
restraint
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JP4879723B2 (en
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Yuki Okamoto
勇紀 岡本
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Daiwa House Industry Co Ltd
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Daiwa House Industry Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a buckling restricting brace which can specify a restriction necessary location of a core by restriction members, achieves economical and rational buckling restriction, facilitates stiffening adjustment, optimizes a buckling mode, and exerts an excellent vibration control function that does not depend on the adhesiveness of a viscoelastic body. <P>SOLUTION: The buckling restricting brace 1 has the core 2 and the pairing restriction members 3 arranged on both sides of the core 2. The core 2 is formed of a corrugated steel plate that has wave ridges 2a arranged along a brace longitudinal direction. Then gaps between the core 2 and the restriction members 3 are filled with a viscoelastic material 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、鉄骨造建物等に制振構造等として使用される座屈拘束ブレースに関する。   The present invention relates to a buckling restrained brace used as a vibration damping structure or the like in a steel structure building or the like.

座屈拘束ブレースは、塑性化させる芯材を拘束材で座屈補強し、かつ芯材と拘束材を軸力方向には絶縁することによって、芯材の圧縮降伏を引っ張り降伏と同等の性状とする部材であり、座屈しないブレースとして、鉄骨造建物等において、柱や梁等の主構造材の間に接合される。従来の座屈拘束ブレースは、芯材に平鋼やＨ形鋼などを用いている（例えば、特許文献１）。なお、制振壁としては、波形鋼板を用いたものがある（例えば、特許文献２）。
特開平１０−３０６４９８号公報 実公平５−５１９号公報 A buckling-restrained brace reinforces the core material to be plastic by buckling with the restraining material and insulates the core material and the restraining material in the axial direction, thereby reducing the compressive yield of the core material to the same property as the tensile yield. As a brace that does not buckle, it is joined between main structural members such as columns and beams in a steel structure building or the like. Conventional buckling-restrained braces use flat steel, H-section steel, or the like as a core material (for example, Patent Document 1). In addition, there exists a thing using a corrugated steel plate as a damping wall (for example, patent document 2).
Japanese Patent Laid-Open No. 10-306498 Japanese Utility Model No. 5-519

従来の芯材に平鋼を用いた座屈拘束ブレースは、平鋼に高次の座屈モードを起こす場合に、その座屈モードの次数や波長などを予測することが難しいため、芯材全体を一様に拘束することが多く、経済性・合理性に欠ける。   Conventional buckling-restrained braces that use flat steel as the core material are difficult to predict the order and wavelength of the buckling mode when a higher-order buckling mode occurs in the flat steel. Are often restrained uniformly and lack economic efficiency and rationality.

この発明の目的は、芯材の拘束材による拘束必要箇所が特定できて、経済的・合理的な座屈拘束が可能となる座屈拘束ブレースを提供することである。
この発明の他の目的は、補剛調整が容易で、座屈モードを適正化できるものとすることである。
この発明のさらに他の目的は、粘弾性体のエネルギー吸収による制振機能を与える場合に、粘弾性体の接着性能に依存しない優れた制振機能が得られるものとすることである。 An object of the present invention is to provide a buckling-restrained brace that can specify a portion of the core member that needs to be restrained by a restraining material, and enables economical and rational buckling restraint.
Another object of the present invention is to enable easy stiffening adjustment and to optimize the buckling mode.
Still another object of the present invention is to provide an excellent vibration damping function that does not depend on the adhesion performance of the viscoelastic body when a vibration damping function by absorbing energy of the viscoelastic body is provided.

この発明の座屈拘束ブレースは、芯材と、この芯材の両面に沿って配置した一対の拘束材とを有する座屈拘束ブレースにおいて、前記芯材を、ブレース長さ方向に沿って波山が並ぶ波形鋼板としたことを特徴とする。
この構成によると、芯材を波形鋼板としたので、芯材に圧縮と引張の軸力が繰り返し入力されても、芯材から拘束材に入力される力の入力部位は、芯材の各波山部分と対応する箇所のみに特定される。したがって、拘束材は、波形鋼板からなる芯材の各波山部分に必要な拘束力を与えるものであれば良く、拘束材は全体に強い拘束力が得られるものとする必要がない。そのため、拘束材による経済的・合理的な座屈拘束が可能となる。 The buckling restraint brace of the present invention is a buckling restraint brace having a core material and a pair of restraint materials arranged along both surfaces of the core material. It is characterized by being a lined corrugated steel sheet.
According to this configuration, since the core material is a corrugated steel plate, even if the axial force of compression and tension is repeatedly input to the core material, the input portion of the force input from the core material to the restraint material is each wave peak of the core material. Only the part corresponding to the part is specified. Therefore, the constraining material only needs to give a necessary constraining force to each wave crest portion of the core made of corrugated steel, and the constraining material does not need to obtain a strong constraining force as a whole. Therefore, economical and rational buckling restraint by restraint material is possible.

この発明において、前記芯材となる波形鋼板に他の波形鋼板を重ねて互いに接合しても良い。例えば、前記芯材となる波形鋼板の端部に、他の波形鋼板を重ねても良い。芯材が波形鋼板であるため、部分的に他の波形鋼板を重ねて端部のみを補剛することができる。そのため、芯材の端部での局部座屈を防ぎ、理想的な座屈モードに近づけることができる。   In the present invention, another corrugated steel sheet may be stacked on the corrugated steel sheet serving as the core material and joined together. For example, another corrugated steel sheet may be stacked on the end of the corrugated steel sheet serving as the core material. Since the core material is a corrugated steel plate, other corrugated steel plates can be partially overlapped to stiffen only the end portion. Therefore, local buckling at the end of the core material can be prevented, and an ideal buckling mode can be achieved.

この発明において、前記芯材と拘束材との間に、粘弾性材を充填しても良い。粘弾性材を充填した場合、粘弾性材の変形によるエネルギー吸収作用が得られ、これにより制振効果が得られる。一般的な粘弾性材による制振機能では、粘弾性材のせん断抵抗によるエネルギー吸収に期待するものであるため、粘弾性材と拘束材等の母材との接着性能が悪いと、剥離が生じて十分なエネルギー吸収機能が得難いことがある。しかし、この発明は、芯材を波形鋼板としたため、芯材に圧縮と引張の軸力が繰り返し入力された場合、芯材の各波山の高さが変わるように芯材が変形し、粘弾性材は、芯材の各波部の箇所で波山高さが変化するように変形を生じる。この変形の抵抗でエネルギー吸収が得られる。そのため、粘弾性体の接着性能に依存しない優れた制振機能を得ることができる。   In the present invention, a viscoelastic material may be filled between the core material and the restraining material. When the viscoelastic material is filled, an energy absorbing action due to deformation of the viscoelastic material is obtained, thereby obtaining a vibration damping effect. The vibration damping function of a general viscoelastic material is expected to absorb energy due to the shear resistance of the viscoelastic material, so peeling occurs when the adhesion performance between the viscoelastic material and the base material such as a restraint material is poor. Therefore, it may be difficult to obtain a sufficient energy absorption function. However, in the present invention, since the core material is a corrugated steel plate, when the axial force of compression and tension is repeatedly input to the core material, the core material is deformed so that the height of each wave peak of the core material changes, and the viscoelasticity The material is deformed so that the wave height changes at each wave portion of the core material. Energy absorption is obtained by the resistance of this deformation. Therefore, an excellent vibration damping function that does not depend on the adhesion performance of the viscoelastic body can be obtained.

この発明の座屈拘束ブレースは、芯材と、この芯材の両面に沿って配置した一対の拘束材とを有する座屈拘束ブレースにおいて、前記芯材を、ブレース長さ方向に沿って波山が並ぶ波形鋼板としたため、芯材の拘束材による拘束必要箇所が特定できて、経済的・合理的な座屈拘束が可能となる。
前記芯材となる波形鋼板の端部に、他の波形鋼板を重ねて互いに接合した場合は、補剛調整が可能で、座屈モードを容易に適正化することができる。
前記芯材と拘束材との間に、粘弾性材を充填した場合は、粘弾性体のエネルギー吸収による制振機能が得れ、その場合に、芯材が波形鋼板であることから、粘弾性体の接着性能に依存しない優れた制振機能を得ることができる。 The buckling restraint brace of the present invention is a buckling restraint brace having a core material and a pair of restraint materials arranged along both surfaces of the core material. Since the corrugated steel sheets are arranged side by side, it is possible to specify the location where the core material is constrained by the constraining material, so that economical and rational buckling restraint is possible.
When another corrugated steel sheet is overlapped and joined to the end of the corrugated steel sheet as the core material, stiffening adjustment is possible and the buckling mode can be easily optimized.
When a viscoelastic material is filled between the core material and the constraining material, a vibration damping function by absorbing the energy of the viscoelastic body can be obtained, and in this case, the core material is a corrugated steel plate. An excellent vibration control function that does not depend on the bonding performance of the body can be obtained.

この発明の第１の実施形態を図１ないし図４と共に説明する。この座屈拘束ブレース１は、芯材２と、この芯材２の両面に沿って配置した一対の拘束材３，３と、これら芯材２と各拘束材３との間に充填した粘弾性体４とを有し、芯材２を、ブレース長さ方向に沿って波山２ａが並ぶ波形鋼板としたものである。   A first embodiment of the present invention will be described with reference to FIGS. The buckling restraint brace 1 includes a core material 2, a pair of restraint materials 3 and 3 disposed along both surfaces of the core material 2, and a viscoelasticity filled between the core material 2 and each restraint material 3. The core material 2 is a corrugated steel sheet in which the ridges 2a are arranged along the brace length direction.

芯材２は、拘束材３よりも幅狭であり、ブレース長さ方向に両端が突出している。芯材２の両側で、両拘束材３，３の間には、図２のようにスペーサ５が介在させてある。スペーサ４は、拘束材３の長さ方向に沿って全長にわたって連続して延びるものであっても、また拘束材３の長さ方向に並んで複数設けられてものであっても良い。スペーサ５の厚さは、例えば、両側の拘束材３の間に、芯材２が僅かな隙間を介して介在可能な程度の間隔を与える厚さとされる。   The core material 2 is narrower than the restraint material 3, and both ends protrude in the brace length direction. Spacers 5 are interposed on both sides of the core material 2 between the restraining materials 3 and 3 as shown in FIG. The spacer 4 may extend continuously over the entire length along the length direction of the restraining material 3, or a plurality of spacers 4 may be provided side by side in the length direction of the restraining material 3. The thickness of the spacer 5 is, for example, a thickness that provides an interval between the constraining materials 3 on both sides so that the core material 2 can be interposed through a slight gap.

芯材２となる波形鋼板は、図１（Ｂ）に示すように、各波山部分（ここでは波の谷となる部分も波山部分と称す）２ａが台形山形のものであるが、例えば図６に示すような円弧状の山形、つまりサイン波状の波形のものであっても良い。
拘束材３は、例えばコンクリート版製の拘束プレートからなる。拘束材３は、コンクリートに代えて、形鋼やその組み合わせ材等からなる鋼材を用いても良い。
粘弾性体４には、アスファルト等が用いられる。粘弾性体４の代わりに、コンクリートやセメント等の硬化性の充填材を充填しても良い。
スペーサ５の材質は、コンクリートまたは鋼材等である。 As shown in FIG. 1 (B), the corrugated steel sheet used as the core material 2 is a trapezoidal mountain shape in which each wave peak part (here, the part that becomes the wave valley is also referred to as the wave peak part) 2a. It may be an arc-shaped mountain shape as shown in FIG.
The restraining material 3 is made of a restraining plate made of a concrete plate, for example. The restraint material 3 may be a steel material made of a shape steel or a combination material thereof instead of concrete.
For the viscoelastic body 4, asphalt or the like is used. Instead of the viscoelastic body 4, a curable filler such as concrete or cement may be filled.
The material of the spacer 5 is concrete or steel.

この構成の座屈拘束ブレース１によると、図４（Ａ）に概念図で示すように、芯材２に軸力として圧縮力ＦＡが作用したときは、芯材２の各波山部分２ａが高くなるように芯材２が変形し、同図（Ｂ）のように引張力ＦＢが作用したときは、芯材２の各波山部分２ａが偏平化するように変形する。
同図（Ａ）のように、圧縮力ＦＡが作用したとき、芯材２から拘束材３に入力される力ｆ１の入力部位は、芯材２の各波山部分２ａと対応する箇所のみに特定される。したがって、その入力部位のみに拘束力ｆ２が与えられれば、力学的に成立する。このため、拘束材３は、芯材２の各波山部分２ａに必要な拘束力ｆ２を与えるものであれば良く、拘束材３は全体に強い拘束力が得られるものとする必要がない。そのため、拘束材３による経済的・合理的な座屈拘束が可能となる。 According to the buckling restrained brace 1 having this configuration, as shown in the conceptual diagram of FIG. 4A, when the compressive force FA acts on the core member 2 as an axial force, each wave crest portion 2a of the core member 2 is high. When the core material 2 is deformed and a tensile force FB is applied as shown in FIG. 5B, each wave crest portion 2a of the core material 2 is deformed so as to be flattened.
As shown in FIG. 6A, when the compressive force FA is applied, the input part of the force f1 input from the core material 2 to the restraint material 3 is specified only in the part corresponding to each wave crest portion 2a of the core material 2. Is done. Therefore, if the restraining force f2 is given only to the input part, it is established dynamically. For this reason, the restraint material 3 should just give the restraint force f2 required for each wave crest part 2a of the core material 2, and it is not necessary for the restraint material 3 to obtain a strong restraint force on the whole. Therefore, economical and rational buckling restraint by the restraining material 3 is possible.

また、芯材２と拘束材３との間に、粘弾性材４を充填したため、粘弾性材４の変形によるエネルギー吸収作用が得られ、しかも粘弾性材４の接着力に依存しない優れた制振機能を得ることができる。これにつき、従来の制振壁と対比して説明する。   In addition, since the viscoelastic material 4 is filled between the core material 2 and the restraining material 3, an energy absorbing action by deformation of the viscoelastic material 4 is obtained, and an excellent control that does not depend on the adhesive force of the viscoelastic material 4 is obtained. A vibration function can be obtained. This will be described in comparison with a conventional damping wall.

図８は、従来の制振壁を上から見た図であり、波形鋼板２１，２１間に粘弾性材２２を介在させたものである。このような制振壁において、同図（Ａ）に矢印で示すように、両側の波形鋼板２１，２１を互いにずらせる力Ｆが作用し、同図（Ｂ）のように波形鋼板２１，２１にずれを生じた場合、粘弾性材２２は、これら図８（Ａ），（Ｂ）の下部に示すように変形する。この場合、粘弾性材２２は、接着面Ｓで接着を維持し、せん断抵抗が生じることでエネルギー吸収の作用が生じる。このような抵抗機構の場合、粘弾性材２２と母材との接着性能が悪いと、その剥離で壊れてしまい、十分な制振能力が発揮できない場合がある。   FIG. 8 is a view of a conventional damping wall as viewed from above, in which a viscoelastic material 22 is interposed between the corrugated steel plates 21 and 21. In such a damping wall, as shown by an arrow in FIG. 6A, a force F that causes the corrugated steel sheets 21 and 21 on both sides to be displaced from each other acts, and the corrugated steel sheets 21 and 21 as shown in FIG. When the deviation occurs, the viscoelastic material 22 is deformed as shown in the lower part of FIGS. 8 (A) and 8 (B). In this case, the viscoelastic material 22 maintains the adhesion on the adhesion surface S, and a shear resistance is generated, so that an energy absorbing action is generated. In the case of such a resistance mechanism, if the adhesive performance between the viscoelastic material 22 and the base material is poor, the viscoelastic material 22 may be broken due to the peeling, and sufficient vibration damping capability may not be exhibited.

これに対して、この実施形態のものでは、図３に概念的に示すように、芯材２に軸力として圧縮力ＦＡが作用したときと、引張力ＦＢが作用したときとでは、芯材２の各波山部分２ａが高さ変わるように芯材２が変形する。このとき、粘弾性材４は、同図（Ａ），（Ｂ）の下部に示すように変形する。
このように、粘弾性材４は接着面Ｓに対して垂直方向に変形し、この変形の抵抗でエネルギーの吸収作用が得られる。したがって、粘弾性体４の接着性能に依存しない優れた制振機能を得ることができる。 On the other hand, in this embodiment, as shown conceptually in FIG. 3, the core material is divided between when the compressive force FA acts on the core material 2 as an axial force and when the tensile force FB acts. The core material 2 is deformed so that the heights of the wavy portions 2a of 2 change. At this time, the viscoelastic material 4 is deformed as shown in the lower part of FIGS.
In this way, the viscoelastic material 4 is deformed in the direction perpendicular to the bonding surface S, and an energy absorbing action is obtained by resistance to this deformation. Therefore, an excellent vibration damping function that does not depend on the adhesive performance of the viscoelastic body 4 can be obtained.

図５は、この発明の他の実施形態を示す。この実施形態は、芯材２となる波形鋼板の両側の端部に、他の波形鋼板２Ａを重ねて互いに接合したものである。この接合は例えば溶接またはボルト等により行う。その他の構成は、図１に示す第１の実施形態と同様である。   FIG. 5 shows another embodiment of the present invention. In this embodiment, another corrugated steel sheet 2A is overlapped and joined to the end portions on both sides of the corrugated steel sheet to be the core material 2. This joining is performed by welding or bolts, for example. Other configurations are the same as those of the first embodiment shown in FIG.

この実施形態の場合、端部に波形鋼板２Ａを重ねることで、芯材２の端部のみが補剛される。そのため、芯材２の端部での局部座屈が防止され、理想的な座屈モードに近づけることができる。   In the case of this embodiment, only the end portion of the core material 2 is stiffened by overlapping the corrugated steel plate 2A on the end portion. Therefore, local buckling at the end of the core material 2 is prevented, and an ideal buckling mode can be achieved.

図７（Ａ），（Ｂ）は、それぞれ座屈拘束ブレース１を筋かいとして用いた例であり、鋼製柱１２ａおよび鋼製梁１２ｂによって組まれた鉄骨構造物１２に、第１の実施形態（図１）にかかる座屈拘束ブレース１を接合している。図７（Ｃ）は、鉄骨構造物１２に上記座屈拘束ブレース１を方杖として接合した例を示す。
このように、鉄骨構造物１２に上記実施形態の座屈拘束ブレース１を組み込むことにより、鉄骨構造物１２の耐震性が強化される。なお、この座屈拘束ブレース１は、方杖に用いるような短いものから、例えば１０ｍを超えるような長尺のものまで適用することができる。 FIGS. 7A and 7B are examples in which the buckling-restrained brace 1 is used as a brace, respectively, and the steel structure 12 assembled by the steel column 12a and the steel beam 12b is used in the first implementation. The buckling restrained brace 1 according to the form (FIG. 1) is joined. FIG. 7C shows an example in which the buckling restrained brace 1 is joined to the steel structure 12 as a cane.
In this way, by incorporating the buckling restrained brace 1 of the above embodiment into the steel structure 12, the earthquake resistance of the steel structure 12 is enhanced. The buckling restrained brace 1 can be applied from a short one used for a cane to a long one exceeding 10 m, for example.

この発明の第１の実施形態に係る座屈拘束ブレースの平面図および縦断面図である。It is the top view and longitudinal cross-sectional view of the buckling restraint brace which concern on 1st Embodiment of this invention. 同座屈拘束ブレースの横断面図である。It is a cross-sectional view of the buckling restraint brace. 同座屈拘束ブレースの粘弾性材の変形を示す説明図である。It is explanatory drawing which shows a deformation | transformation of the viscoelastic material of the buckling restraint brace. 同座屈拘束ブレースの拘束力の作用箇所を示す説明図である。It is explanatory drawing which shows the action location of the restraint force of the buckling restraint brace. この発明の他の実施形態に係る座屈拘束ブレースの縦断面図である。It is a longitudinal cross-sectional view of the buckling restraint brace which concerns on other embodiment of this invention. この発明のさらに他の実施形態に係る座屈拘束ブレースの部分縦断面図である。It is a fragmentary longitudinal cross-sectional view of the buckling restraint brace which concerns on further another embodiment of this invention. この発明の座屈拘束ブレースを用いた鉄骨構造物の各例の骨組構式を示す部分正面図である。It is a partial front view which shows the frame composition of each example of the steel structure using the buckling restraint brace of this invention. 提案例の課題を示す断面図である。It is sectional drawing which shows the subject of a proposal example.

符号の説明Explanation of symbols

１…座屈拘束ブレース
２…芯材
２Ａ…他の波形鋼板
３…拘束材
４…粘弾性材
５…スペーサ DESCRIPTION OF SYMBOLS 1 ... Buckling restraint brace 2 ... Core material 2A ... Other corrugated steel plate 3 ... Restraint material 4 ... Viscoelastic material 5 ... Spacer

Claims (3)

芯材と、この芯材の両面に沿って配置した一対の拘束材とを有する座屈拘束ブレースにおいて、前記芯材を、ブレース長さ方向に沿って波山が並ぶ波形鋼板としたことを特徴とする座屈拘束ブレース。   In a buckling restrained brace having a core material and a pair of constraining materials arranged along both sides of the core material, the core material is a corrugated steel sheet in which wave peaks are arranged along the brace length direction. A buckling restraint brace. 請求項１において、前記芯材となる波形鋼板の端部に、他の波形鋼板を重ねて互いに接合した座屈拘束ブレース。   The buckling restrained brace according to claim 1, wherein another corrugated steel sheet is overlapped and joined to an end of the corrugated steel sheet as the core material. 請求項１または請求項２において、前記芯材と拘束材との間に、粘弾性材を充填した座屈拘束ブレース。   The buckling restraint brace according to claim 1 or 2, wherein a viscoelastic material is filled between the core member and the restraint member.
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Cited By (5)

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Publication number Priority date Publication date Assignee Title
JP2010018951A (en) * 2008-07-08 2010-01-28 Daiwa House Industry Co Ltd Vibration control stud concurrently using viscoelastic damper and buckling restraining brace
CN102926479A (en) * 2012-10-25 2013-02-13 沈阳建筑大学 Waveform mild steel energy dissipation support
WO2013096390A1 (en) * 2011-12-19 2013-06-27 Hinchman Andrew Buckling restrained brace
JP2014218797A (en) * 2013-05-02 2014-11-20 新日鉄住金エンジニアリング株式会社 Member for vibration control, and core material
CN115370213A (en) * 2022-10-07 2022-11-22 北京工业大学 Composite damper for amplifying knee-brace viscoelastic shape memory alloy corrugated plate

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Publication number Priority date Publication date Assignee Title
CN103758240B (en) * 2014-01-03 2016-05-11 清华大学 A kind of anti-buckling support of separate type connecting with wave webs
CN108385832B (en) * 2018-03-07 2020-10-20 上海毅匹玺建筑科技有限公司 Assembled beam column node structure
CN109235733B (en) * 2018-10-16 2020-11-27 北京工业大学 Assembled plate-column system adopting prestressed steel bars and inner core bending type buckling-restrained brace

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JPS5682218A (en) * 1979-12-10 1981-07-04 Fujitsu Ltd Continuous automatic mold molding apparatus
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JP2007107280A (en) * 2005-10-13 2007-04-26 Tokai Rubber Ind Ltd Brace type viscoelastic damper

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010018951A (en) * 2008-07-08 2010-01-28 Daiwa House Industry Co Ltd Vibration control stud concurrently using viscoelastic damper and buckling restraining brace
WO2013096390A1 (en) * 2011-12-19 2013-06-27 Hinchman Andrew Buckling restrained brace
CN102926479A (en) * 2012-10-25 2013-02-13 沈阳建筑大学 Waveform mild steel energy dissipation support
CN102926479B (en) * 2012-10-25 2016-01-06 沈阳建筑大学 Waveform mild steel energy dissipation support
JP2014218797A (en) * 2013-05-02 2014-11-20 新日鉄住金エンジニアリング株式会社 Member for vibration control, and core material
CN115370213A (en) * 2022-10-07 2022-11-22 北京工业大学 Composite damper for amplifying knee-brace viscoelastic shape memory alloy corrugated plate

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