JP6054914B2 - Elastic-plastic hysteretic damper - Google Patents

Elastic-plastic hysteretic damper Download PDF

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JP6054914B2
JP6054914B2 JP2014124688A JP2014124688A JP6054914B2 JP 6054914 B2 JP6054914 B2 JP 6054914B2 JP 2014124688 A JP2014124688 A JP 2014124688A JP 2014124688 A JP2014124688 A JP 2014124688A JP 6054914 B2 JP6054914 B2 JP 6054914B2
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shearing
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幸宏 倉田
幸宏 倉田
哲央 早野
哲央 早野
岡田 誠司
誠司 岡田
裕紀 田中
裕紀 田中
裕 道脇
裕 道脇
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株式会社Ihiインフラシステム
Next Innovation合同会社
Next Innovation合同会社
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本発明は、建築物や橋梁等において上部構造物と下部構造物との間に設置され、常時や所定レベルまでの地震に対しては上部構造の変位を拘束するストッパとして機能し、所定レベル以上の地震に対しては剪断塑性変形することによりダンパとして機能する弾塑性履歴型ダンパに関する。   The present invention is installed between an upper structure and a lower structure in a building, a bridge, etc., and functions as a stopper for restraining the displacement of the upper structure at all times or for earthquakes up to a predetermined level. The present invention relates to an elasto-plastic hysteretic damper that functions as a damper by shear plastic deformation against earthquakes.
下記特許文献1−3には、橋梁の支承構造に用いられる低降伏点鋼を用いた剪断パネル型ダンパが記載されている。この剪断パネル型ダンパは、建築物や橋梁等において上部構造物と下部構造物との間において、下部構造物に固定設置され、常時や所定レベルまでの地震に対しては上部構造の変位を拘束するストッパとして機能し、所定レベル以上の地震に対しては剪断塑性変形することによりダンパとして機能する。具体的に、この剪断パネル型ダンパは、水平変位に対し剪断変形が生じるとき、剪断部の履歴減衰を利用して地震時の振動を低減させる。   Patent Documents 1 to 3 below describe a shear panel type damper using a low yield point steel used for a bridge support structure. This shear panel type damper is fixedly installed in the lower structure between the upper structure and the lower structure in buildings and bridges, etc., and restrains the displacement of the upper structure at all times or for earthquakes up to a predetermined level. It functions as a stopper, and functions as a damper by shear plastic deformation for earthquakes above a predetermined level. Specifically, this shear panel type damper reduces the vibration at the time of earthquake using the hysteresis damping of the shearing part when shear deformation occurs with respect to the horizontal displacement.
特許第3755886号公報Japanese Patent No. 3755886 特許第4192225号公報Japanese Patent No. 4192225 特開2007−198002号公報JP 2007-198002 A
しかしながら、何れの特許文献の剪断パネル型ダンパにおいても、剪断部を一つしか有しておらず、所定レベル以上の地震に対して、一方向からの水平力に対してしかダンパとして機能しない。したがって、例えば、橋軸方向の水平力に対してダンパとして機能するように剪断パネル型ダンパを設置した場合に、橋軸方向以外の方向からの水平力が加わると、剪断パネル型ダンパは、入力のあった水平力を十分に減衰させることが出来ない。地震の際に何れの方向から所定レベル以上の水平力の入力があるのかは、予測困難である。   However, any of the shear panel type dampers of any patent document has only one shearing portion and functions as a damper only against a horizontal force from one direction against an earthquake of a predetermined level or higher. Therefore, for example, when a shear panel type damper is installed to function as a damper against the horizontal force in the bridge axis direction, if a horizontal force from a direction other than the bridge axis direction is applied, the shear panel type damper is input. It is not possible to sufficiently attenuate the horizontal force. It is difficult to predict from which direction a horizontal force of a predetermined level or more is input in the event of an earthquake.
また、剪断パネル型ダンパの設置に際しては、想定される入力方向に対して高精度にダンパの剪断変形方向を合わせる設置角度設定が必要とされる。   Further, when installing the shear panel type damper, it is necessary to set an installation angle that matches the shear deformation direction of the damper with high accuracy with respect to an assumed input direction.
本発明は、所定レベル以上の地震の際に、複数の方向からの入力に対してダンパとして機能し得る弾塑性履歴型ダンパを提供することを目的とする。   An object of the present invention is to provide an elastic-plastic hysteretic damper that can function as a damper with respect to inputs from a plurality of directions during an earthquake of a predetermined level or higher.
本発明に係る弾塑性履歴型ダンパは、建物及び/又は建造物に適用可能な弾塑性履歴型ダンパであって、一対の第一補強部と、前記一対の第一補強部を連結した板状の剪断部と、前記一対の第一補強部の両端間にそれぞれ接続した一対のプレートとを備え、前記剪断部は、前記第一補強部に対して傾斜を成し、前記剪断部は、前記剪断部が前記一対の第一補強部の一方から他方へ向かって延在する方向の一部と他部とで中心線の接線の方向が異なり、前記剪断部は、入力により荷重を受けたときに、変形してエネルギー吸収を行う。 The elastic-plastic hysteresis type damper according to the present invention is an elastic-plastic hysteresis type damper applicable to a building and / or a building, and is a plate-like shape in which a pair of first reinforcing portions and the pair of first reinforcing portions are connected. And a pair of plates respectively connected between both ends of the pair of first reinforcing portions, the shearing portion is inclined with respect to the first reinforcing portion, and the shearing portion is The direction of the tangent of the center line is different between a part of the direction in which the shearing part extends from one of the pair of first reinforcing parts toward the other and the other part, and the shearing part receives a load by an input In addition, it is deformed to absorb energy.
また、前記第一補強部は、互いに平行に配置されているようにしても良い。更に、前記一対のプレートは、入力により互いに異なる方向に変位する第一構造物と第二構造物とにそれぞれ接合されているようにしても良い。更に、剪断部を一対の板状の部材が連結部を介して一連に設けられているようにしても良い。例えば、前記剪断部は、平面状を成す。また、前記連結部は、前記剪断部と一体、別体の何れであっても良い。 The first reinforcing portions may be arranged in parallel to each other. Furthermore, the pair of plates may be joined to a first structure and a second structure that are displaced in different directions by input. Further, the shearing part may be provided with a pair of plate-like members in series via the connecting part. For example, the shearing portion has a planar shape. Further, the connecting portion may be either integral with the shearing portion or separate.
連結部により一体化された一対板状の部材の形状は、前記一対板状の部材の間隔を、前記連結部側に比し、前記連結部とは反対側の端部の方を狭くした、所謂馬蹄型であっても良い。更に、前記一対板状の部材の間隔を前記連結部を鋭角又は鈍角として、前記連結部と反対側の端部に向かって漸次広がるようにした、略V字状としても良い。 The shape of the pair of plate-like members integrated by the connecting portion is such that the distance between the pair of plate-like members is narrower at the end opposite to the connecting portion than the connecting portion side. The so-called horseshoe type may also be used. Furthermore, the interval between the pair of plate-like members may be substantially V-shaped so that the connecting portion has an acute angle or an obtuse angle and gradually widens toward the end opposite to the connecting portion.
前記剪断部は、前記連結部と反対側の端部に第一補強部を設けるようにしても良い。この場合、前記第一補強部は、前記剪断部と一体(例えば曲げ加工)又は別体(例えば溶接接合)であっても良い。 You may make it the said shearing part provide a 1st reinforcement part in the edge part on the opposite side to the said connection part. In this case, the first reinforcing portion may be integral with front Symbol shearing unit (e.g. bending) or separately (e.g., welded).
更に、前記連結部は、第二補強部によって補強されていても良い。   Furthermore, the connecting part may be reinforced by a second reinforcing part.
本発明では、一対の第一補強部を連結した板状の剪断部が設けられているので、所定レベル以上の地震の際に、剪断部が直接又は間接に上部構造物のストッパに突き当たり、突き当たったときの衝撃を剪断部が剪断弾塑性変形することにより減衰させることが出来る。また、剪断部の中心線の接線の方向を異ならせることで、一方向だけでなく複数の方向からの地震時の振動を吸収することが出来る。 In the present invention, since a plate-like shearing portion is provided by connecting a pair of first reinforcing portions , the shearing portion directly or indirectly hits the stopper of the superstructure in the event of an earthquake of a predetermined level or higher. The impact at the time can be attenuated by the shearing elastic-plastic deformation of the shearing portion. In addition, by changing the direction of the tangent to the center line of the shearing portion, it is possible to absorb vibration during an earthquake from not only one direction but also from a plurality of directions.
本発明を適用した弾塑性履歴型ダンパが用いられる橋梁を示す図であり、(A)は橋軸方向の模式的な断面図、(B)は橋軸直角方向の斜視図である。It is a figure which shows the bridge in which the elastic-plastic hysteresis type damper to which this invention is applied is used, (A) is typical sectional drawing of a bridge axis direction, (B) is a perspective view of a bridge axis orthogonal direction. 本発明を適用した弾塑性履歴型ダンパの斜視図である。It is a perspective view of the elastic-plastic hysteresis type damper to which this invention is applied. 上記弾塑性履歴型ダンパに中心軸線方向から所定レベル以上の入力があったときの状態を示す図であり、(A)は入力方向を示す平面図であり、(B)は斜視図である。It is a figure which shows a state when the input more than a predetermined level is given to the said elastoplastic hysteresis type damper from the center axis direction, (A) is a top view which shows an input direction, (B) is a perspective view. 上記弾塑性履歴型ダンパに中心軸線方向に対して斜めの方向から所定レベル以上の入力があったときの状態を示す図であり、(A)は入力方向を示す平面図であり、(B)は斜視図である。It is a figure which shows a state when there exists an input more than a predetermined level from the direction slanting with respect to the central-axis direction to the said elastoplastic hysteresis type damper, (A) is a top view which shows an input direction, (B) FIG. 馬蹄型の弾塑性履歴型ダンパを示す図であり、(A)は、(B)の高さ方向中間部の横断面図であり、(B)は斜視図である。It is a figure which shows a horseshoe-type elastic-plastic hysteresis type | mold damper, (A) is a cross-sectional view of the height direction intermediate part of (B), (B) is a perspective view. U字型の弾塑性履歴型ダンパを示す図であり、(A)は、(B)の高さ方向中間部の横断面図であり、(B)は斜視図である。It is a figure which shows a U-shaped elastic-plastic hysteresis type damper, (A) is a cross-sectional view of the intermediate part of the height direction of (B), (B) is a perspective view. 連結部が鋭角のV字型の弾塑性履歴型ダンパを示す図であり、(A)は、(B)の高さ方向中間部の横断面図であり、(B)は斜視図である。It is a figure which shows the V-shaped elastic-plastic hysteresis type damper whose connection part is an acute angle, (A) is a cross-sectional view of the intermediate part of the height direction of (B), (B) is a perspective view. 連結部が鈍角のV字型の弾塑性履歴型ダンパを示す図であり、(A)は、(B)の高さ方向中間部の横断面図であり、(B)は斜視図である。It is a figure which shows the V-shaped elastic-plastic hysteresis type damper with an obtuse angle | corner, (A) is a cross-sectional view of the intermediate part of the height direction of (B), (B) is a perspective view. 剪断部の先端部に形成された補強部が円筒状に形成された例を示す図であり、(A)は断面図、(B)は斜視図である。It is a figure which shows the example in which the reinforcement part formed in the front-end | tip part of a shearing part was formed in the cylindrical shape, (A) is sectional drawing, (B) is a perspective view. 剪断部の先端部に形成された補強部が十字状に形成された例を示す図であり、(A)は断面図、(B)は斜視図である。It is a figure which shows the example in which the reinforcement part formed in the front-end | tip part of a shearing part was formed in the cross shape, (A) is sectional drawing, (B) is a perspective view. (A)−(E)は、剪断部の先端部に形成された補強部の更なる変形例である。(A)-(E) is the further modification of the reinforcement part formed in the front-end | tip part of a shearing part. 直角の連結部を示す図であり、(A)は断面図、(B)は斜視図である。It is a figure which shows a right-angled connection part, (A) is sectional drawing, (B) is a perspective view. 連結部の外側に補強部を設けた図であり、(A)は断面図、(B)は斜視図である。It is the figure which provided the reinforcement part in the outer side of the connection part, (A) is sectional drawing, (B) is a perspective view. 連結部の内側に補強部を設けた図であり、(A)は断面図、(B)は斜視図である。It is the figure which provided the reinforcement part inside the connection part, (A) is sectional drawing, (B) is a perspective view. 剪断部の基端部を離間させ連結片で連結した図であり、(A)は断面図、(B)は斜視図である。It is the figure which spaced apart the base end part of the shearing part, and connected with the connection piece, (A) is sectional drawing, (B) is a perspective view. 連結部を円筒状にした図であり、(A)は断面図、(B)は斜視図である。It is the figure which made the connection part cylindrical, (A) is sectional drawing, (B) is a perspective view. 連結部の外側に二つの補強片を設けた図であり、(A)は断面図、(B)は斜視図である。It is the figure which provided the two reinforcement pieces on the outer side of the connection part, (A) is sectional drawing, (B) is a perspective view. 矩形状を成す連結部を示す図であり、(A)は断面図、(B)は斜視図である。It is a figure which shows the connection part which comprises rectangular shape, (A) is sectional drawing, (B) is a perspective view. 剪断部の基端部を離間させ連結片で連結した図であり、(A)は断面図、(B)は斜視図である。It is the figure which spaced apart the base end part of the shearing part, and connected with the connection piece, (A) is sectional drawing, (B) is a perspective view. 馬蹄型の弾塑性履歴型ダンパの剪断部に補強部を形成した図であり、(A)は横断面図、(B)は斜視図である。It is the figure which formed the reinforcement part in the shearing part of a horseshoe-type elastic-plastic hysteresis type damper, (A) is a cross-sectional view, (B) is a perspective view. Π型の弾塑性履歴型ダンパの剪断部に補強部を形成した図であり、(A)は横断面図、(B)は斜視図である。It is the figure which formed the reinforcement part in the shearing part of a saddle type elastic-plastic hysteresis type damper, (A) is a cross-sectional view, (B) is a perspective view. 連結部が鋭角のV字型の弾塑性履歴型ダンパの剪断部に補強部を形成した図であり、(A)は、横断面図であり、(B)は斜視図である。It is the figure which formed the reinforcement part in the shearing part of the V-shaped elastic-plastic hysteresis type damper whose connection part is an acute angle, (A) is a cross-sectional view, (B) is a perspective view. 連結部を鈍角とし、更に、剪断部と補強部との成す角も鈍角とした弾塑性履歴型ダンパを示す図であり、(A)は、断面図であり、(B)は斜視図である。It is a figure which shows the elastic-plastic hysteresis type damper which made the connection part the obtuse angle, and also made the angle which the shearing part and the reinforcement part made an obtuse angle, (A) is sectional drawing, (B) is a perspective view. . 連結部を円筒状とし、剪断部の先端部にも円筒状の補強部を設けた弾塑性履歴型ダンパを示す図であり、(A)は、断面図であり、(B)は斜視図である。It is a figure which shows the elastoplastic hysteresis type damper which made the connection part cylindrical and provided the cylindrical reinforcement part also in the front-end | tip part of the shear part, (A) is sectional drawing, (B) is a perspective view. is there. 剪断部に貫通した凹字型の孔部を形成した例を示す図であり、(A)は側面図、(B)は正面図である。It is a figure which shows the example which formed the concave-shaped hole part penetrated in the shearing part, (A) is a side view, (B) is a front view. 剪断部に貫通したスリット状の孔部を形成した例を示す図であり、(A)は側面図、(B)は正面図である。It is a figure which shows the example which formed the slit-shaped hole part penetrated in the shearing part, (A) is a side view, (B) is a front view. 剪断部のコーナ部に貫通した孔部を形成した例を示す図であり、(A)は側面図、(B)は正面図である。It is a figure which shows the example which formed the hole penetrated in the corner part of a shearing part, (A) is a side view, (B) is a front view. 剪断部の中央部に貫通した孔部を形成した例を示す図であり、(A)は側面図、(B)は正面図である。It is a figure which shows the example which formed the hole penetrated in the center part of the shearing part, (A) is a side view, (B) is a front view. 剪断部の全体に複数の貫通した孔部を形成した例を示す図であり、(A)は側面図、(B)は正面図である。It is a figure which shows the example which formed the several through-hole part in the whole shearing part, (A) is a side view, (B) is a front view. 連結部を設けずに、二つの剪断部を鋭角のハ字型に配置するとともに、補強部によって剪断部の両端形状をT字状に設けた弾塑性履歴型ダンパを示す図であり、(A)は、横断面図であり、(B)は斜視図である。It is a figure which shows the elastoplastic hysteresis type damper which provided two shearing parts in acute angle C shape without providing a connection part, and provided both ends shape of the shearing part in the T shape by the reinforcement part. ) Is a cross-sectional view, and (B) is a perspective view. 連結部を設けずに、二つの剪断部を鈍角のハ字型に配置するとともに、補強部によって剪断部の両端形状をT字状に設けた弾塑性履歴型ダンパを示す横断面図である。It is a cross-sectional view showing an elastic-plastic hysteretic damper in which two shearing parts are arranged in an obtuse C-shape without providing a connecting part, and both ends of the shearing part are provided in a T shape by a reinforcing part. 連結部を設けずに、二つの剪断部をT字型に配置するとともに、補強部によって剪断部の両端形状をT字状に設けた弾塑性履歴型ダンパを示す横断面図である。It is a cross-sectional view showing an elastic-plastic hysteretic damper in which two shearing portions are arranged in a T shape without providing a connecting portion, and both ends of the shearing portion are provided in a T shape by a reinforcing portion. 連結部を設けずに、二つの剪断部を略平行に配置するとともに、補強部によって剪断部の両端形状をT字状に設けた弾塑性履歴型ダンパを示す横断面図である。It is a cross-sectional view showing an elastic-plastic hysteretic damper in which two shearing portions are arranged substantially in parallel without providing a connecting portion, and both ends of the shearing portion are provided in a T shape by a reinforcing portion. 連結部を設けずに、二つの剪断部を馬蹄状に配置するとともに、補強部によって剪断部の両端形状をT字状に設けた弾塑性履歴型ダンパを示す横断面図である。It is a cross-sectional view showing an elastic-plastic hysteretic damper in which two shearing portions are arranged in a horseshoe shape without providing a connecting portion, and both ends of the shearing portion are provided in a T shape by a reinforcing portion. 連結部を設けずに、二つの剪断部をU字状に配置するとともに、補強部によって剪断部の両端形状をT字状に設けた弾塑性履歴型ダンパを示す横断面図である。It is a cross-sectional view showing an elastic-plastic hysteretic damper in which two shearing portions are arranged in a U shape without providing a connecting portion, and both end shapes of the shearing portion are provided in a T shape by a reinforcing portion. 連結部を設けずに、二つの剪断部を鋭角又は鈍角のハ字型に配置するとともに、補強部によって各剪断部をクランク状に設けた弾塑性履歴型ダンパを示す横断面図である。It is a cross-sectional view showing an elastic-plastic hysteretic damper in which two shearing portions are arranged in an acute or obtuse C shape without providing a connecting portion, and each shearing portion is provided in a crank shape by a reinforcing portion. 連結部を設けずに、二つの剪断部を略平行に配置するとともに、補強部によって各剪断部をクランク状に設けた弾塑性履歴型ダンパを示す横断面図である。It is a cross-sectional view showing an elastic-plastic hysteretic damper in which two shearing portions are arranged substantially in parallel without providing a connecting portion, and each shearing portion is provided in a crank shape by a reinforcing portion. 連結部を設けずに、二つの剪断部を鋭角又は鈍角のハ字型に配置するとともに、補強部によって各剪断部をコ字状に設けた弾塑性履歴型ダンパを示す横断面図である。It is a cross-sectional view showing an elastic-plastic hysteretic damper in which two shearing portions are arranged in an acute or obtuse C shape without providing a connecting portion, and each shearing portion is provided in a U shape by a reinforcing portion. 連結部を設けずに、二つの剪断部を略平行に配置するとともに、補強部によって各剪断部をコ字状に設けた弾塑性履歴型ダンパを示す横断面図である。It is a cross-sectional view showing an elastic-plastic hysteretic damper in which two shearing portions are arranged substantially in parallel without providing a connecting portion, and each shearing portion is provided in a U shape by a reinforcing portion. 一方の剪断部が第一のベースプレートと第一のプレート間に固設され、他方の剪断部が第二のベースプレートと第二のプレート間に固設された弾塑性履歴型ダンパを示す横断面図であり、(A)は、一方の剪断部の長手方向が第一のベースプレートの長手方向と異なるように設けるとともに、他方の剪断部の長手方向が第二のベースプレートや第二のプレートの長手方向と異なるように設けた横断面図であり、(B)は、略一致するように設けた横断面図である。Cross-sectional view showing an elastic-plastic hysteretic damper in which one shearing portion is fixed between the first base plate and the first plate and the other shearing portion is fixed between the second base plate and the second plate (A) is provided so that the longitudinal direction of one shearing portion is different from the longitudinal direction of the first base plate, and the longitudinal direction of the other shearing portion is the longitudinal direction of the second base plate or the second plate. FIG. 5B is a cross-sectional view provided so as to be different from FIG. 第一のベースプレートと第二のベースプレートがベースプレートに固設され、第一のプレートと第二のプレートがプレートに固設された弾塑性履歴型ダンパを示す横断面図であり、(A)は、一方の剪断部の長手方向が第一のベースプレートの長手方向と異なるように設けるとともに、他方の剪断部の長手方向が第二のベースプレートや第二のプレートの長手方向と異なるように設けた横断面図であり、(B)は、略一致するように設けた横断面図である。It is a cross-sectional view showing an elastic-plastic hysteretic damper in which a first base plate and a second base plate are fixed to the base plate, and the first plate and the second plate are fixed to the plate. Cross section provided so that the longitudinal direction of one shearing part is different from the longitudinal direction of the first base plate and the longitudinal direction of the other shearing part is different from the longitudinal direction of the second base plate or the second plate It is a figure and (B) is the cross-sectional view provided so that it might correspond substantially. 弾塑性履歴型ダンパの設置例を示す図であり、(A)は、側面図であり、(B)は斜視図である。It is a figure which shows the example of installation of an elastic-plastic hysteresis type damper, (A) is a side view, (B) is a perspective view.
以下、本発明に係る弾塑性履歴型ダンパについて図面を参照して説明する。なお、以下、弾塑性履歴型ダンパについて、以下の順に沿って説明する。   Hereinafter, an elastic-plastic hysteretic damper according to the present invention will be described with reference to the drawings. Hereinafter, the elastic-plastic hysteresis type damper will be described in the following order.
1.橋梁の説明
2.弾塑性履歴型ダンパの説明
3.弾塑性履歴型ダンパの変形例1の説明(馬蹄状)
4.弾塑性履歴型ダンパの変形例2の説明(U字状)
5.弾塑性履歴型ダンパの変形例3の説明(鋭角V字状)
6.弾塑性履歴型ダンパの変形例4の説明(鈍角V字状)
7.弾塑性履歴型ダンパの変形例5の説明(剪断部先端の補強部の変形例)
8.弾塑性履歴型ダンパの変形例6の説明(連結部の変形例)
9.弾塑性履歴型ダンパの具体的な構成例の説明
10.剪断部に貫通した孔部及び/又はスリットを設けた変形例の説明
11.弾塑性履歴型ダンパの変形例7の説明(連結部の省略)
12.弾塑性履歴型ダンパの設置例の説明
1. Explanation of the bridge 2. Explanation of elastoplastic hysteresis damper Explanation of Modified Example 1 of Elastic-Plastic Hysteretic Damper (Horse-Shoe)
4). Explanation of Variation 2 of Elastic-Plastic Hysteretic Damper (U-shaped)
5. Explanation of Modification 3 of Elastic-Plastic Hysteresis Damper (Acute Angle V Shape)
6). Explanation of Variation 4 of Elastic-Plastic Hysteresis Damper (Oblique V-shape)
7). Explanation of Modification 5 of Elastic-Plastic Hysteresis Damper (Modification of Reinforcement at the Tip of Shear Part)
8). Explanation of Modification 6 of Elastic-Plastic Hysteresis Damper (Modification of Connecting Portion)
9. 10. Description of specific configuration example of elastoplastic hysteresis type damper 10. Description of modification in which hole and / or slit penetrating through sheared portion is provided. Explanation of Modification 7 of Elasto-Plastic Hysteresis Damper (Omission of connecting part)
12 Explanation of installation example of elastic-plastic hysteretic damper
[1.橋梁の説明]
図1(A)及び(B)に示すように、一般に、橋桁等の上部構造物1は、橋脚や橋台といった下部構造物2上に設置された支承装置3に支承されている。図1に示すように、支承装置3には、一般に、固定支承装置3aと可動支承装置3bとがあり、固定支承装置3aは、一般に、上部構造物1の回転変形に対応して鉛直荷重を支持しつつ、水平・鉛直方向の変位を拘束して制限する。可動支承装置3bは、一般に、上部構造の回転変形と水平変位に対応している。ところで、新設橋梁では、橋脚等の下部構造物2の耐震性能が高められ、また、反力分散構造や免震構造の採用などが図られている。既設橋梁においても、下部構造物2の補強や支承取り替えや落橋防止システムの付加などの耐震補強工事が行われている。
[1. Description of bridge]
As shown in FIGS. 1A and 1B, generally, an upper structure 1 such as a bridge girder is supported by a support device 3 installed on a lower structure 2 such as a bridge pier or an abutment. As shown in FIG. 1, the support device 3 generally includes a fixed support device 3 a and a movable support device 3 b, and the fixed support device 3 a generally applies a vertical load corresponding to the rotational deformation of the upper structure 1. While supporting, the displacement in the horizontal and vertical directions is restricted and limited. The movable bearing device 3b generally corresponds to the rotational deformation and horizontal displacement of the superstructure. By the way, in the new bridge, the seismic performance of the lower structure 2 such as a bridge pier is enhanced, and a reaction force dispersion structure or a seismic isolation structure is adopted. The existing bridges are also undergoing seismic reinforcement work such as reinforcement of the substructure 2 and replacement of bearings and addition of a fall prevention system.
例えば、耐震補強工事では、例えば下部構造物2の水平反力を分散するため、固定支承装置3aを、積層ゴム支承や、支承板支承やローラ支承といった金属支承等の可動支承装置3bに交換する作業が行われる。しかし、固定支承装置3aを可動支承装置3bに交換したときには、上部構造物1の移動量が増大する等の問題が生じ、移動量を制限する必要がある。本発明に係る弾塑性履歴型ダンパ10は、例えば、可動支承装置3bとの組で、建築物や橋梁等において、上部構造物1と下部構造物2との間に設置され、下部構造物2に対する上部構造物1の移動量を制限するようにしている。   For example, in the seismic reinforcement work, for example, in order to disperse the horizontal reaction force of the lower structure 2, the fixed bearing device 3a is replaced with a movable rubber bearing device 3b such as a laminated rubber bearing, a metal bearing such as a bearing plate bearing or a roller bearing. Work is done. However, when the fixed bearing device 3a is replaced with the movable bearing device 3b, there arises a problem that the amount of movement of the upper structure 1 increases, and it is necessary to limit the amount of movement. The elastic-plastic hysteretic damper 10 according to the present invention is installed between the upper structure 1 and the lower structure 2 in a building, a bridge, or the like, for example, in combination with the movable support device 3b. The amount of movement of the superstructure 1 with respect to is limited.
例えば、上部構造物1となる桁は、一対の主桁1a,1aと横桁1bとを有している。そして、既設橋梁において、固定支承装置3aの下部工耐力が不足している際には、主桁1a,1aの下部フランジ4と下部構造物2である橋脚との間に、それまで上部構造物1の鉛直荷重を支持するために設置されていた固定支承装置3aに替えて可動支承装置3bが設置される。この際、下部構造物2には、可動支承装置3bと組で弾塑性履歴型ダンパ10が設置される。主として橋軸方向の所定レベル以上の水平力に対して弾塑性履歴型ダンパ10を設置するときには、弾塑性履歴型ダンパ10を上部構造物1の横桁1bに設けられるストッパ16,16で囲むように下部構造物2に設置される。これにより、弾塑性履歴型ダンパ10は、大きな減衰性能により所定レベル以上の水平力を低減する他、高い剛性によりゴム支承や免震支承のみの弾性支持に比べ水平変位を小さく抑えることが出来る。これにより、弾塑性履歴型ダンパ10は、下部構造物2を縮小出来、また、下部工耐震補強の縮小が可能となる。また、水平変位が小さくなることで桁遊間を小さくすることが可能となり、伸縮装置などの形状も小型化出来る。   For example, the girder which becomes the upper structure 1 has a pair of main girder 1a, 1a and a horizontal girder 1b. And in the existing bridge, when the substructure strength of the fixed support device 3a is insufficient, the upper structure is between the lower flange 4 of the main girders 1a and 1a and the bridge pier which is the lower structure 2. A movable bearing device 3b is installed instead of the stationary bearing device 3a that has been installed to support the vertical load of 1. At this time, an elastic-plastic hysteretic damper 10 is installed in the lower structure 2 in combination with the movable support device 3b. When the elastic-plastic hysteretic damper 10 is installed mainly against a horizontal force of a predetermined level or more in the bridge axis direction, the elastic-plastic hysteretic damper 10 is surrounded by stoppers 16, 16 provided on the cross beam 1 b of the upper structure 1. Is installed in the lower structure 2. As a result, the elastic-plastic hysteretic damper 10 can reduce horizontal force of a predetermined level or more due to large damping performance, and also can suppress horizontal displacement to a small level as compared with elastic support using only rubber bearings or seismic isolation bearings due to high rigidity. Thereby, the elastoplastic hysteresis type damper 10 can reduce the lower structure 2 and can reduce the seismic reinforcement of the substructure. In addition, since the horizontal displacement is reduced, it is possible to reduce the gap between the girders, and the size of the telescopic device can be reduced.
なお、詳細は後述するが、弾塑性履歴型ダンパ10は、必ずしも、可動支承装置3bとの組で用いる必要があるものではない。また、図1のような桁形式の橋梁だけでなく、アーチ橋、トラス橋などの特殊な構造を有する橋梁の端支点、ブレース材の端部や中間部等にも適用することが出来る。   In addition, although mentioned later for details, the elastic-plastic hysteresis type damper 10 does not necessarily need to be used in a pair with the movable support device 3b. Further, the present invention can be applied not only to a girder type bridge as shown in FIG. 1 but also to an end fulcrum of a bridge having a special structure such as an arch bridge or a truss bridge, an end portion or an intermediate portion of a brace material.
[2.弾塑性履歴型ダンパの説明]
図2に示すように、本発明が適用された弾塑性履歴型ダンパ10は、二つの剪断部11,11を連結部12で連結して全体が一連となるように形成されている。このような弾塑性履歴型ダンパ10には、剪断部11,11に、一般構造用鋼材に比べ延性に富み、降伏点に対して上下限の規格値を有するため性能安定性に優れた構造用鋼材である低降伏点鋼を用いることが出来る。また、弾塑性履歴型ダンパ10には、地震エネルギを塑性歪エネルギによって吸収させるものであるため、地震時には確実に塑性化し、履歴挙動のバラツキが小さく、降伏点の許容範囲が狭い低降伏点鋼が好適である。
[2. Explanation of elastic-plastic hysteretic damper]
As shown in FIG. 2, the elastic-plastic hysteretic damper 10 to which the present invention is applied is formed such that two shearing portions 11 and 11 are connected by a connecting portion 12 so that the whole is a series. Such an elasto-plastic hysteretic damper 10 is structurally superior in performance stability because the shearing portions 11 and 11 are more ductile than general structural steel materials and have upper and lower limit values for the yield point. A low yield point steel, which is a steel material, can be used. The elastic-plastic hysteretic damper 10 absorbs seismic energy by plastic strain energy, so that it is reliably plasticized in the event of an earthquake, has low hysteresis behavior variation, and has a low yield point tolerance. Is preferred.
低降伏点鋼で形成される剪断部11,11は、例えば矩形板状を成し、平面状を成している。そして、一端部は、平面板状の連結部12に溶接接合等で固定されている。なお、連結部12も、低降伏点鋼が用いることが可能である。また、剪断部11,11と連結部12とは、一連の低降伏点鋼板を曲げ加工で形成するようにしても良い。剪断部11,11の他端部は、剪断部11,11の端部を外側に広げるようにコーナ部を介して補強部13,13が曲げ加工によって形成されている。勿論、補強部13,13は、剪断部11,11に対して溶接接合でも良い。補強部13,13は、ここでは外側にほぼ90度折曲されているが、剪断部11,11に対して外側に広がっていれば、剪断部11,11と成す角が鋭角であっても鈍角であっても良い。このように、平面板状の連結部12と一体化された二つの剪断部11,11は、連結部12の側から補強部13,13側に向かって漸次広がり、略V字状を成し、ここでは、剪断部11,11の延長線の交点が鋭角となるように形成されている。なお、剪断部11及び連結部12に、低降伏点鋼を用いることに限定されるものではなく、一般構造用鋼材等を用いるようにしても良い。   The shearing portions 11 and 11 formed of low yield point steel have, for example, a rectangular plate shape and a planar shape. The one end is fixed to the flat plate-like connecting portion 12 by welding or the like. The connecting portion 12 can also be made of low yield point steel. Moreover, you may make it the shear parts 11 and 11 and the connection part 12 form a series of low yield point steel plates by a bending process. The other ends of the shearing portions 11 and 11 are formed by bending the reinforcing portions 13 and 13 via the corner portions so that the end portions of the shearing portions 11 and 11 are spread outward. Of course, the reinforcing portions 13 and 13 may be welded to the shearing portions 11 and 11. The reinforcing portions 13 and 13 are bent almost 90 degrees on the outer side here. However, if the reinforcing portions 13 and 13 are spread outward with respect to the shearing portions 11 and 11, even if the angle formed with the shearing portions 11 and 11 is an acute angle. It may be obtuse. As described above, the two shearing portions 11 and 11 integrated with the planar plate-like connecting portion 12 gradually spread from the connecting portion 12 side toward the reinforcing portions 13 and 13 and have a substantially V shape. Here, the intersection of the extension lines of the shearing portions 11 and 11 is formed to be an acute angle. In addition, it is not limited to using low yield point steel for the shear part 11 and the connection part 12, You may make it use general structural steel materials.
一体化された剪断部11,11と連結部12は、下部構造物2との取付部の基盤となるベースプレート14に溶接接合等で固設される。このベースプレート14は、一体化された剪断部11,11と連結部12より大きな鋼板であり、矩形状を成す。そして、略V字状を成す一体化された剪断部11,11と連結部12は、ベースプレート14の幅方向中心線と剪断部11,11間の中心線とがほぼ一致する位置に固定される。また、このベースプレート14は、下部構造物2に対してアンカーボルト等で固定される。   The integrated shearing portions 11 and 11 and the connecting portion 12 are fixed to the base plate 14 serving as a base of the attachment portion with the lower structure 2 by welding or the like. The base plate 14 is a steel plate larger than the integrated shearing portions 11 and 11 and the coupling portion 12 and has a rectangular shape. The integrated shearing portions 11 and 11 and the connecting portion 12 that are substantially V-shaped are fixed at positions where the center line in the width direction of the base plate 14 and the centerline between the shearing portions 11 and 11 substantially coincide. . The base plate 14 is fixed to the lower structure 2 with anchor bolts or the like.
更に、一体化された剪断部11,11と連結部12を挟んでベースプレート14の反対側にも、プレート15が設けられ、プレート15には、一体化された剪断部11,11と連結部12が溶接接合等で固定される。このプレート15は、上部構造物1側に位置するものであり、ベースプレート14と同様なものであっても、異なるものであっても良い。ここでは、ベースプレート14と同じものが用いられる。そして、プレート15には、一体化された剪断部11,11と連結部12が剪断部11,11間の中心線とプレート15の幅方向中心線とがほぼ一致する位置に固定される。このプレート15の短辺側端面、すなわち橋軸直角方向と平行な端面15a,15aは、上部構造物1のストッパと突き当たる部分となる。   Further, a plate 15 is provided on the opposite side of the base plate 14 across the integrated shearing portions 11 and 11 and the connecting portion 12, and the integrated shearing portions 11 and 11 and the connecting portion 12 are provided on the plate 15. Is fixed by welding or the like. The plate 15 is located on the upper structure 1 side and may be the same as or different from the base plate 14. Here, the same thing as the base plate 14 is used. Then, the integrated shearing portions 11 and 11 and the connecting portion 12 are fixed to the plate 15 at a position where the center line between the shearing portions 11 and 11 and the center line in the width direction of the plate 15 substantially coincide. The short-side end surfaces of the plate 15, that is, the end surfaces 15 a and 15 a parallel to the direction perpendicular to the bridge axis, are portions that abut against the stopper of the upper structure 1.
一方、上部構造物1側は、図1(B)及び図2に示すように、上部構造物1の横桁1bにストッパ16,16が設けられている。ストッパ16,16は、橋軸方向に離間して設けられ、これらストッパ16,16の間に、下部構造物2に固定された弾塑性履歴型ダンパ10が配設される。弾塑性履歴型ダンパ10は、剪断部11,11間の中心線を橋軸方向にして、下部構造物2にアンカーボルト等で固定される。かくして、弾塑性履歴型ダンパ10は、主として橋軸方向の所定レベル以上の水平力の入力があったとき、上部構造物1のストッパ16,16とプレート15の橋軸直角方向と平行な端面15a,15aとが突き当たり、突き当たったときの衝撃を剪断部11,11や連結部12が剪断塑性変形することにより減衰させる。   On the other hand, on the upper structure 1 side, as shown in FIGS. 1B and 2, stoppers 16, 16 are provided on the cross beam 1 b of the upper structure 1. The stoppers 16 and 16 are provided apart from each other in the bridge axis direction, and an elastic-plastic hysteretic damper 10 fixed to the lower structure 2 is disposed between the stoppers 16 and 16. The elastoplastic hysteresis type damper 10 is fixed to the lower structure 2 with anchor bolts or the like with the center line between the shearing portions 11 and 11 as the bridge axis direction. Thus, the elastic-plastic hysteretic damper 10 has an end face 15a parallel to the stoppers 16 and 16 of the upper structure 1 and the direction perpendicular to the bridge axis of the plate 15 when a horizontal force exceeding a predetermined level mainly in the bridge axis direction is input. , 15a, and the impact at the time of abutting is attenuated by shear plastic deformation of the shearing portions 11, 11 and the connecting portion 12.
具体的に、図3(A)に示すように、弾塑性履歴型ダンパ10は、橋軸方向の入力があったとき、図3(B)に示すように、連結部12のベースプレート14側の角近傍の剪断部11,11及び連結部12が塑性変形して振動を減衰させる。なお、連結部12のベースプレート14側の角近傍の剪断部11,11及び連結部12の変形の程度は、橋軸方向の入力の場合、入力の大きさによって異なることになる。   Specifically, as shown in FIG. 3 (A), the elastoplastic hysteresis type damper 10 has an input in the bridge axis direction, as shown in FIG. 3 (B), on the base plate 14 side of the connecting portion 12. The shearing portions 11 and 11 and the connecting portion 12 near the corner are plastically deformed to attenuate the vibration. Note that the degree of deformation of the shearing portions 11 and 11 near the corner of the connecting portion 12 on the base plate 14 side and the connecting portion 12 varies depending on the magnitude of the input in the case of the input in the bridge axis direction.
また、図4(A)に示すように、橋軸に対して斜めの方向から所定レベル以上の入力があったときには、図4(B)に示すように、入力のあった方向と近い剪断部11が大きく塑性変形し振動を減衰させる。なお、図4の例では、橋軸に対して10°傾いた方向から入力があった状態を示している。連結部12のベースプレート14側の角近傍の剪断部11,11及び連結部12の変形の程度は、入力の角度や入力の大きさによって異なることになる。   Further, as shown in FIG. 4A, when there is an input of a predetermined level or more from a direction oblique to the bridge axis, as shown in FIG. 11 is greatly plastically deformed to attenuate the vibration. In addition, in the example of FIG. 4, the state which had the input from the direction inclined 10 degrees with respect to the bridge axis is shown. The degree of deformation of the shearing portions 11, 11 near the corner of the connecting portion 12 on the base plate 14 side and the connecting portion 12 varies depending on the input angle and the input size.
以上のような弾塑性履歴型ダンパ10は、二つの剪断部11,11を有しているので、剪断部が一つの場合に比べ、より大きな振動を吸収することが出来る。また、剪断部11,11がV字状に開くように形成されているので、例えば、剪断部11,11間の中心線が橋軸方向となるように設置されたときにも、橋軸方向からの入力だけでなく、橋軸に対して斜めの方向からの振動も減衰させることが出来る。   Since the elastoplastic hysteresis type damper 10 as described above has the two shearing portions 11, 11, it can absorb a larger vibration than the case where there is one shearing portion. Further, since the shearing portions 11 and 11 are formed to open in a V shape, for example, when the center line between the shearing portions 11 and 11 is installed in the bridge axis direction, the bridge axis direction is also provided. In addition to the input from the bridge, vibration from a direction oblique to the bridge axis can be attenuated.
更に、弾塑性履歴型ダンパ10は、二つの剪断部11,11を有し、剪断部11,11間の中心線(橋軸方向)に対して斜めの方向からの振動も減衰させることが出来、剪断部が一つの場合に比べ、入力の許容範囲及び許容角度が広く、入力に対して尤度があるので、弾塑性履歴型ダンパ10を橋梁に取り付ける際に、例えば、剪断部11,11間の中心線が橋軸方向に対してずれ及び/又は傾いていても、振動を減衰させることが出来る。したがって、弾塑性履歴型ダンパ10は、剪断部が一つの場合に比べ、据付誤差を吸収することが出来、施工性が良い。よって、弾塑性履歴型ダンパ10は、剪断部が一つの場合に比べ、例えば、既設橋梁に後付けする場合や、斜角のついた桁や曲線桁や支点部に斜角の付いた桁等に用いる場合に有効である。   Further, the elastoplastic hysteresis type damper 10 has two shearing portions 11, 11, and can also attenuate vibrations from an oblique direction with respect to the center line between the shearing portions 11, 11 (bridge axis direction). Compared with the case where there is one shearing portion, the allowable range and angle of input are wide and the input has a high likelihood. Therefore, when the elastic-plastic hysteretic damper 10 is attached to the bridge, for example, the shearing portions 11, 11 Even if the center line between them is shifted and / or inclined with respect to the bridge axis direction, the vibration can be attenuated. Therefore, the elasto-plastic hysteresis type damper 10 can absorb the installation error and has good workability as compared with the case where there is one shearing portion. Therefore, the elasto-plastic hysteretic damper 10 can be used, for example, when retrofitted to an existing bridge, or with a beveled girder, a curved girder, or a fulcrum girder, etc. It is effective when used.
更に、弾塑性履歴型ダンパ10は、二つの剪断部11,11を有しているので、剪断部が一つの場合に比べ、剪断部11の高さを低くすることが出来る。更に、剪断部11の高さを低くすることが出来るので、基部に生じる曲げモーメントを少なくすることが出来、ベースプレート14、プレート15及びアンカーボルト等に対する負荷を低減することが出来る。したがって、弾塑性履歴型ダンパ10は、ベースプレート14及びプレート15の厚さを薄くすることが出来、アンカーボルトの径を小さくすることが出来る。更に、弾塑性履歴型ダンパ10は、剪断部11の高さを低くすることが出来、ベースプレート14及びプレート15の厚さを薄くすることが出来るので、剪断部が一つの場合に比べ、全高を低くすることが出来る。これにより、弾塑性履歴型ダンパ10は、上部構造物1や下部構造物2等の狭い隙間にも配置することが出来、狭隘部での作業性が良く、施工性が良い。更に、下部構造物2に例えばブラケット等を配置する場合も、下部構造物2の付近に設けることが出来る。   Furthermore, since the elastic-plastic hysteretic damper 10 has the two shearing portions 11, 11, the height of the shearing portion 11 can be reduced as compared with the case where there is one shearing portion. Furthermore, since the height of the shearing portion 11 can be reduced, the bending moment generated at the base portion can be reduced, and the load on the base plate 14, the plate 15 and the anchor bolt can be reduced. Therefore, the elastic-plastic hysteretic damper 10 can reduce the thickness of the base plate 14 and the plate 15 and reduce the diameter of the anchor bolt. Furthermore, the elastic-plastic hysteretic damper 10 can reduce the height of the shearing portion 11 and can reduce the thickness of the base plate 14 and the plate 15. Can be lowered. Thereby, the elastic-plastic hysteresis type damper 10 can be arrange | positioned also in narrow gaps, such as the upper structure 1 and the lower structure 2, and workability | operativity in a narrow part is good and workability | operativity is good. Further, when a bracket or the like is disposed on the lower structure 2, it can be provided near the lower structure 2.
なお、以上の例では、主として橋軸方向の振動を減衰させる弾塑性履歴型ダンパ10の設置例を説明したが、弾塑性履歴型ダンパ10は、橋軸直角方向の振動を減衰させるためにも使用することが出来る。この場合、弾塑性履歴型ダンパ10は、橋軸直角方向に上部構造物1に離間して設けられたストッパ16,16間に、剪断部11,11間の中心線が橋軸直角方向となるように設置される。これにより、弾塑性履歴型ダンパ10は、橋軸直角方向の振動を減衰させることが出来る他に、橋軸直角方向に対して斜めの方向の振動も減衰させることが出来る。更に、弾塑性履歴型ダンパ10の設置に際しては、想定される入力方向に対して高精度に弾塑性履歴型ダンパ10の剪断変形方向を合わせる設置角度に自由度を持たせることが出来る。   In the above example, the installation example of the elastic-plastic hysteretic damper 10 that mainly attenuates the vibration in the bridge axis direction has been described. However, the elastic-plastic hysteretic damper 10 is also used to attenuate the vibration in the direction perpendicular to the bridge axis. Can be used. In this case, in the elastoplastic hysteresis type damper 10, the center line between the shearing portions 11, 11 is perpendicular to the bridge axis between the stoppers 16, 16 provided apart from the upper structure 1 in the direction perpendicular to the bridge axis. Installed. Thereby, the elastic-plastic hysteretic damper 10 can attenuate vibrations in a direction perpendicular to the bridge axis, and can also attenuate vibrations in a direction oblique to the direction perpendicular to the bridge axis. Furthermore, when installing the elastoplastic hysteresis type damper 10, it is possible to give a degree of freedom to the installation angle for matching the shear deformation direction of the elastoplastic history type damper 10 with high accuracy with respect to the assumed input direction.
更に、弾塑性履歴型ダンパ10としては、ベースプレート14やプレート15を省略しても良い。ベースプレート14を省略したときには、下部構造物2に一体化された剪断部11,11と連結部12を固定するようにすれば良い。また、プレート15を省略したときには、剪断部11,11の先端部や補強部13,13が直接ストッパ16,16に突き当たるようにすれば良い。このようにすることで、弾塑性履歴型ダンパ10の部品点数の削減を図ることが出来る。勿論、ベースプレート14やプレート15を用いた方が、性能の安定性が向上する点で好ましい。   Further, the base plate 14 and the plate 15 may be omitted as the elastic-plastic hysteresis type damper 10. When the base plate 14 is omitted, the shearing portions 11 and 11 and the connecting portion 12 integrated with the lower structure 2 may be fixed. Further, when the plate 15 is omitted, the distal end portions of the shearing portions 11 and 11 and the reinforcing portions 13 and 13 may be directly brought into contact with the stoppers 16 and 16. By doing in this way, the number of parts of the elastic-plastic hysteresis type damper 10 can be reduced. Of course, the use of the base plate 14 or the plate 15 is preferable in terms of improving the stability of performance.
[3.弾塑性履歴型ダンパの変形例1の説明(馬蹄状)]
図2−図4に示す例では、剪断部11,11と連結部12とがV字状を成す場合を説明したが、図5に示すように、弾塑性履歴型ダンパ10は、剪断部11,11と連結部12とが馬蹄状を成していても同様な効果を得ることが出来る。すなわち、図5の例では、剪断部11,11の間隔が連結部12側に比し、連結部12とは反対側の端部の間隔の方が短くなるように形成されている。この場合、二つの剪断部11,11は、平面板状であっても良いし、曲面板状を成していても良い。また、この例では、一枚の低降伏点鋼板を曲げ加工して、馬蹄状に形成するようにしても良い。曲げ加工の場合には、剪断部11,11と連結部12とを溶接する必要がなくなり、生産効率の向上を図ることが出来る。また、連結部12は、ここでは、湾曲しているが、図2−図4のように平板状であっても良い。
[3. Description of Modification 1 of Elastic-Plastic Hysteretic Damper (Horse-Shoe)]
In the example illustrated in FIGS. 2 to 4, the case where the shearing portions 11 and 11 and the connecting portion 12 are V-shaped has been described. However, as illustrated in FIG. 5, the elastic-plastic hysteretic damper 10 includes the shearing portion 11. , 11 and the connecting portion 12 have a horseshoe shape, the same effect can be obtained. That is, in the example of FIG. 5, the interval between the shearing portions 11, 11 is formed so that the interval between the end portions on the side opposite to the connecting portion 12 is shorter than that on the connecting portion 12 side. In this case, the two shearing portions 11 and 11 may have a flat plate shape or a curved plate shape. In this example, one low yield point steel plate may be bent and formed into a horseshoe shape. In the case of bending, it is not necessary to weld the shearing parts 11, 11 and the connecting part 12, and the production efficiency can be improved. Moreover, although the connection part 12 is curving here, flat form may be sufficient like FIGS. 2-4.
[4.弾塑性履歴型ダンパの変形例2の説明(U字状)]
図6(A)及び(B)に示すように、弾塑性履歴型ダンパ10は、剪断部11,11と連結部12とがU字状を成していても同様な効果を得ることが出来る。すなわち、図6(A)及び(B)の例では、二つの剪断部11,11の間隔が一定となっており、連結部12が湾曲して形成されている。特に、U字状の場合には、剪断部11,11が二つ設けられているので、より大きな振動吸収することができる。また、橋軸方向に対して斜めの入力に対しても、剪断部11,11と連結部12とで減衰させることが出来る。勿論、連結部12は平板状であっても良い。このような図6(A)及び(B)の例にあっても、U字状の剪断部11,11と連結部12は、曲げ加工によって形成することが出来る。
[5.弾塑性履歴型ダンパの変形例3の説明(鋭角V字状)]
[4. Description of Modification 2 of Elastic-Plastic Hysteretic Damper (U-shaped)]
As shown in FIGS. 6A and 6B, the elastoplastic hysteresis type damper 10 can obtain the same effect even if the shearing portions 11 and 11 and the connecting portion 12 are U-shaped. . That is, in the example of FIGS. 6A and 6B, the interval between the two shearing portions 11 and 11 is constant, and the connecting portion 12 is formed to be curved. In particular, in the case of a U-shape, since two shearing portions 11 are provided, a larger vibration can be absorbed. Further, it is possible to attenuate the shearing portions 11 and 11 and the connecting portion 12 with respect to an input oblique to the bridge axis direction. Of course, the connecting portion 12 may be flat. Even in the example of FIGS. 6A and 6B, the U-shaped shearing portions 11 and 11 and the connecting portion 12 can be formed by bending.
[5. Explanation of Modification 3 of Elastic-Plastic Hysteresis Damper (Acute Angle V Shape)]
図7(A)及び(B)に示すように、弾塑性履歴型ダンパ10は、全体を略V字状に形成し、剪断部11,11を連結する連結部12を鋭角としても同様な効果を得ることが出来る。すなわち、剪断部11,11は、連結部12から先端部に向かって漸次広がるように形成される。このような図7の例にあっても、剪断部11,11と連結部12は、曲げ加工によって形成することが出来る。特に、剪断部11,11を略V字状としたときには、橋軸に対して斜めの方向からの入力を効果的に減衰させることが出来る。なお、この例では、連結部12が鋭角を成していれば、剪断部11,11は、平面でなく曲面であっても良い。   As shown in FIGS. 7A and 7B, the elastic-plastic hysteretic damper 10 is formed in a substantially V shape as a whole, and the same effect can be obtained even if the connecting portion 12 that connects the shearing portions 11 and 11 has an acute angle. Can be obtained. That is, the shearing portions 11 and 11 are formed so as to gradually spread from the connecting portion 12 toward the tip portion. Even in the example of FIG. 7, the shearing portions 11 and 11 and the connecting portion 12 can be formed by bending. In particular, when the shearing portions 11 and 11 are substantially V-shaped, input from an oblique direction with respect to the bridge axis can be effectively attenuated. In this example, as long as the connecting portion 12 forms an acute angle, the shearing portions 11 and 11 may be curved surfaces instead of flat surfaces.
[6.弾塑性履歴型ダンパの変形例4の説明(鈍角V字状)]
図8(A)及び(B)に示すように、弾塑性履歴型ダンパ10は、全体を略V字状に形成し、剪断部11,11を連結する連結部12を鈍角としても同様な効果を得ることが出来る。すなわち、剪断部11,11は、連結部12から先端部に向かって漸次広がるように形成される。このような図8(A)及び(B)の例にあっても、剪断部11,11と連結部12は、曲げ加工によって形成することが出来る。特に、剪断部11,11を略V字状としたときには、橋軸に対して斜めの方向からの入力を効果的に減衰させることが出来る。そして、連結部12の角度の設定によって、効果的に減衰出来る入力の方向を設定することが出来る。なお、この例では、連結部12が鈍角を成していれば、剪断部11,11は、平面でなく曲面であっても良い。
[6. Description of Modification 4 of Elastic-Plastic Hysteresis Damper (Oblique V-shape)]
As shown in FIGS. 8A and 8B, the elastic-plastic hysteretic damper 10 is formed in a substantially V shape as a whole, and the same effect can be obtained even if the connecting portion 12 that connects the shearing portions 11 and 11 is obtuse. Can be obtained. That is, the shearing portions 11 and 11 are formed so as to gradually spread from the connecting portion 12 toward the tip portion. Even in the example of FIGS. 8A and 8B, the shearing portions 11 and 11 and the connecting portion 12 can be formed by bending. In particular, when the shearing portions 11 and 11 are substantially V-shaped, input from an oblique direction with respect to the bridge axis can be effectively attenuated. The direction of input that can be effectively attenuated can be set by setting the angle of the connecting portion 12. In this example, as long as the connecting portion 12 forms an obtuse angle, the shearing portions 11 and 11 may be curved surfaces instead of flat surfaces.
[7.弾塑性履歴型ダンパの変形例5の説明(剪断部先端の補強部の変形例)]
ところで、図2−図4に示す弾塑性履歴型ダンパ10は、剪断部11,11の先端部の補強部13,13が略90度外側に開いた場合を説明したが、この補強部13,13は、図9(A)及び(B)に示すように、円筒状であっても良い。また、図10(A)及び(B)に示すように、補強部13,13は、剪断部11,11の先端部とほぼ直角に交差する補強片13aで形成し、十字状としても良い。この場合、補強片17,17は、剪断部11,11の先端部の相対する面のそれぞれに溶接接合される。勿論、前述の交差部は、必ずしも直角である必要はなく、剪断部が剪断変形する際に、剪断部の先端部が面外変形を来したり、座屈することを防止することが出来るように構成されていれば特に限定されるものではない。
[7. Description of Modification 5 of Elastic-Plastic Hysteresis Damper (Modification of Reinforcement Part at Shear Part Tip)]
The elastic-plastic hysteretic damper 10 shown in FIGS. 2 to 4 has been described with respect to the case where the reinforcing portions 13 and 13 at the distal ends of the shearing portions 11 and 11 are opened approximately 90 degrees outward. As shown in FIGS. 9A and 9B, 13 may be cylindrical. Further, as shown in FIGS. 10A and 10B, the reinforcing portions 13 and 13 may be formed by reinforcing pieces 13a that intersect the tip portions of the shearing portions 11 and 11 substantially at right angles, and may have a cross shape. In this case, the reinforcing pieces 17 and 17 are welded to the opposing surfaces of the front ends of the shearing portions 11 and 11, respectively. Of course, the above-mentioned intersecting portion does not necessarily have to be a right angle, and when the shearing portion undergoes shear deformation, the tip of the shearing portion can be prevented from causing out-of-plane deformation or buckling. If it is comprised, it will not specifically limit.
更に、図11(A)に示すように、補強部13,13は、剪断部11,11の先端部に、剪断部11,11の厚さ方向の両側に張り出すように、補強部13,13を構成する平板状の補強板を溶接接合し、先端形状がT字状を成すようにしても良い。また、図11(B)に示すように、補強部13,13は、平板状の補強板を外側にのみ張り出すように溶接接合し、先端形状がL字状を成すようにしても良い。なお、図11(B)の補強部13,13は、剪断部11,11の先端部を折り曲げて形成するようにしても良い。更に、図11(C)に示すように、剪断部11,11の先端部よりやや基端側に、補強部13,13を構成する補強板を外側に張り出すように溶接接合するようにしても良い。更に、図11(D)に示すように、補強部13,13は、外側に張り出すように形成される際、剪断部11,11と成す角が、図11(A)−()の直角の場合と異なり、鋭角となるようにしても良い。勿論、この例の変形例として、補強部13,13と剪断部11,11とが成す角を鈍角とすることもできる。更に、図11(E)に示すように、補強部13,13と剪断部11,11とが成す角を円弧面で構成するようにしても良い。 Further, as shown in FIG. 11 (A), the reinforcing portions 13, 13 are reinforced at the distal end portions of the shearing portions 11, 11 so as to protrude on both sides in the thickness direction of the shearing portions 11, 11. 13 may be welded and joined so that the tip shape is T-shaped. Further, as shown in FIG. 11 (B), the reinforcing portions 13 and 13 may be joined by welding so that a flat reinforcing plate projects only outward, and the tip shape may be L-shaped. In addition, you may make it form the reinforcement parts 13 and 13 of FIG.11 (B) by bending the front-end | tip part of the shearing parts 11 and 11. FIG. Further, as shown in FIG. 11 (C), the reinforcing plates constituting the reinforcing portions 13 and 13 are welded and joined so as to project outward from the distal ends of the shearing portions 11 and 11 slightly to the proximal end side. Also good. Further, as shown in FIG. 11 (D), when the reinforcing portions 13 and 13 are formed so as to project outward, the angle formed with the shearing portions 11 and 11 is as shown in FIGS. 11 (A) to 11 ( C ). Unlike the case of a right angle, it may be an acute angle. Of course, as a modification of this example, the angle formed by the reinforcing portions 13 and 13 and the shearing portions 11 and 11 may be an obtuse angle. Furthermore, as shown in FIG. 11 (E), the angle formed by the reinforcing portions 13 and 13 and the shearing portions 11 and 11 may be configured by an arc surface.
[8.弾塑性履歴型ダンパの変形例6の説明(連結部の変形例)]
図2−図4に示す弾塑性履歴型ダンパ10は、剪断部11,11を連結する連結部12が平板状に形成されているが、図12(A)及び(B)に示すように、連結部12を略直角に形成するようにしても良い。すなわち、連結部12は、平板状に形成しても良いし、曲面で形成しても良いし、更に、図7(A)及び(B)に示すように、鋭角を成すように形成しても良いし、図8(A)及び(B)に示すように、鈍角を成すように形成しても良い。
[8. Description of Modification 6 of Elastic-Plastic Hysteresis Damper (Modification of Connecting Portion)]
The elastic-plastic hysteretic damper 10 shown in FIG. 2 to FIG. 4 has a connecting portion 12 that connects the shearing portions 11 and 11 formed in a flat plate shape, but as shown in FIGS. 12 (A) and (B), The connecting portion 12 may be formed at a substantially right angle. That is, the connecting portion 12 may be formed in a flat plate shape, a curved surface, or an acute angle as shown in FIGS. 7A and 7B. Alternatively, as shown in FIGS. 8A and 8B, it may be formed to have an obtuse angle.
更に、剪断部11,11を連結する連結部12にも、補強部17を形成するようにしても良い。図13(A)及び(B)に示す例では、連結部12の外側に補強部17となる補強片17aを形成している。この場合、補強片17aは、剪断部11,11間の中心線の延長線上となるように形成すると良い。この補強片17aは、例えば、剪断部11,11で構成される連結部12に対して溶接接合等で固定される。この例において、剪断部11,11を連結する連結部12は、鋭角、直角、鈍角の何れであっても良い。また、図14(A)及び(B)に示すように、補強部17は、連結部12の内側に、二つの剪断部11,11の基端部に架け渡すように形成しても良い。すなわち、補強片17bは、二つの剪断部11,11の連結部12側に補強片17bを架け渡すように溶接接合される。   Furthermore, you may make it form the reinforcement part 17 also in the connection part 12 which connects the shearing parts 11 and 11. FIG. In the example shown in FIGS. 13A and 13B, a reinforcing piece 17 a serving as the reinforcing portion 17 is formed outside the connecting portion 12. In this case, the reinforcing piece 17a is preferably formed so as to be on an extension line of the center line between the shearing portions 11 and 11. For example, the reinforcing piece 17a is fixed to the connecting portion 12 including the shearing portions 11 and 11 by welding or the like. In this example, the connecting portion 12 that connects the shearing portions 11 and 11 may be any of an acute angle, a right angle, and an obtuse angle. Further, as shown in FIGS. 14A and 14B, the reinforcing portion 17 may be formed inside the connecting portion 12 so as to span the base end portions of the two shearing portions 11 and 11. That is, the reinforcing piece 17b is welded so as to bridge the reinforcing piece 17b on the connecting portion 12 side of the two shearing portions 11 and 11.
更に、図15(A)及び(B)に示すように、連結部12は、剪断部11,11の互いの基端部を離間させて、連結片12aで連結するようにしても良い。この場合、連結片12aは、各端部が各剪断部11,11の内側の面に溶接接合される。更に、連結部12は、図16(A)及び(B)に示すように、円筒体12bで構成し、円筒体12bの外周面に、剪断部11,11の基端部を溶接接合するようにしても良い。更に、連結部12は、図17(A)及び(B)に示すように、一方の剪断部11の基端部と他方の剪断部11の基端部とが交差するように十字状に形成するようにしても良い。この場合、例えば、一方の剪断部11aの基端部に、他方の剪断部11bの基端部を溶接接合する。この際、一方の剪断部11aの端面よりやや内側に他方の剪断部11bの基端部を溶接接合し、ここを連結部12とする。そして、一方の剪断部11aの先端に形成され補強片12cと同じ長さの補強片12dを、一方の剪断部11aに溶接接合して他方の剪断部11の延長線上に形成する。更に、図18(A)及び(B)に示すように、連結部12は、連結部12を平板状に形成し、また、互いの剪断部11,11が平行になるようにして、連結部12が矩形状を成すようにしても良い。すなわち、この場合、一体化された剪断部11,11と連結部12は、矩形状を成すことになる。更に、図19(A)及び(B)に示すように、剪断部11,11は、基端部を平板状の連結部12に離間させて、外側に開くように溶接接合しても良い。この場合、連結部12に形成された剪断部11,11の基端部より外側が補強部17,17として機能する。   Furthermore, as shown to FIG. 15 (A) and (B), the connection part 12 may space apart the mutual base end part of the shearing parts 11 and 11, and may make it connect with the connection piece 12a. In this case, each end of the connecting piece 12 a is welded to the inner surface of each shearing portion 11, 11. Further, as shown in FIGS. 16A and 16B, the connecting portion 12 is formed of a cylindrical body 12b, and the base end portions of the shearing portions 11 and 11 are welded to the outer peripheral surface of the cylindrical body 12b. Anyway. Further, as shown in FIGS. 17A and 17B, the connecting portion 12 is formed in a cross shape so that the base end portion of one shearing portion 11 and the base end portion of the other shearing portion 11 intersect. You may make it do. In this case, for example, the base end portion of the other shearing portion 11b is welded to the base end portion of the one shearing portion 11a. At this time, the base end portion of the other shearing portion 11 b is welded and joined slightly inside the end surface of one shearing portion 11 a, and this is used as the connecting portion 12. Then, a reinforcing piece 12d formed at the tip of one shearing portion 11a and having the same length as the reinforcing piece 12c is welded to one shearing portion 11a and formed on an extension line of the other shearing portion 11. Further, as shown in FIGS. 18A and 18B, the connecting portion 12 is formed so that the connecting portion 12 is formed in a flat plate shape, and the shearing portions 11 and 11 are parallel to each other. 12 may form a rectangular shape. That is, in this case, the integrated shearing portions 11 and 11 and the connecting portion 12 form a rectangular shape. Furthermore, as shown to FIG. 19 (A) and (B), the shearing parts 11 and 11 may be weld-joined so that a base end part may be spaced apart from the flat connection part 12, and it may open outside. In this case, the outer side of the base ends of the shearing portions 11 and 11 formed in the connecting portion 12 functions as the reinforcing portions 17 and 17.
[9.弾塑性履歴型ダンパの具体的な構成例の説明]
図20(A)及び(B)の例は、図5に示した馬蹄型の弾塑性履歴型ダンパ10の剪断部11,11の先端部に、先端よりやや基端側に、外側に張り出すように平板状の補強板を形成し、補強部13,13としても良い(図11()参照)。図21(A)及び(B)の例は、平板状の連結部12に、剪断部11,11を略平行に形成し、剪断部11,11の基端部から先端部に亘って間隔を一定にしても良い。この際、剪断部11,11の先端部には、外側に張り出す補強部13,13を溶接接合によって形成しても良い。勿論、補強部13,13は、溶接ではなく、剪断部11,11の先端部を折り曲げて形成しても良い。また、連結部12は、剪断部11,11の基端部より外側にはみ出した部分が補強部17,17となる。なお、補強部13,13と剪断部11,11とが成す角は、直角だけでなく、鋭角でも鈍角でも良い。図22(A)及び(B)の例は、全体を略V字状に形成し、剪断部11,11を連結する連結部12を鋭角とし、剪断部11,11の先端部に、外側に張り出すように補強部13,13を形成している。ここでの補強部13,13は、溶接接合でも良いが、曲げ加工によって形成されている。
[9. Description of specific configuration example of elastic-plastic hysteretic damper]
20 (A) and 20 (B) is projected outward from the distal ends of the shearing portions 11 and 11 of the horseshoe-type elastic-plastic hysteresis damper 10 shown in FIG. a flat reinforcing plate is formed as, may be as a reinforcing portion 13 (see FIG. 11 (C)). In the example of FIGS. 21A and 21B, the shearing portions 11 and 11 are formed substantially parallel to the flat plate-like connecting portion 12, and the interval is extended from the base end portion to the distal end portion of the shearing portions 11 and 11. It may be constant. At this time, reinforcing portions 13 and 13 projecting outward may be formed at the front ends of the shearing portions 11 and 11 by welding. Of course, the reinforcing portions 13 and 13 may be formed by bending the tip portions of the shearing portions 11 and 11 instead of welding. Further, in the connecting portion 12, portions that protrude outward from the base end portions of the shearing portions 11 and 11 become reinforcing portions 17 and 17. Note that the angle formed by the reinforcing portions 13 and 13 and the shearing portions 11 and 11 may be not only a right angle but also an acute angle or an obtuse angle. In the example of FIGS. 22A and 22B, the whole is formed in a substantially V shape, the connecting portion 12 that connects the shearing portions 11 and 11 has an acute angle, and the tip of the shearing portions 11 and 11 is outward. Reinforcing portions 13, 13 are formed so as to overhang. Although the reinforcement parts 13 and 13 here may be welding joining, they are formed by the bending process.
図23(A)及び(B)の例は、剪断部11,11が連結される連結部12を曲面で形成し、剪断部11,11が成す連結部12の角を鈍角にしている。更に、剪断部11,11の先端部の補強部13,13は、外側に、剪断部11,11に対して一連の弧状の曲面を成すように形成されている。更に、図24(A)及び(B)の例に示すように、本発明の弾塑性履歴型ダンパは、連結部12を円筒状に形成し(図16参照)、剪断部11,11が成す角が鈍角となるようにし、更に、剪断部11,11の先端部に円筒状の補強部13,13を形成するようにしても良い(図9参照)。   In the example of FIGS. 23A and 23B, the connecting portion 12 to which the shearing portions 11 and 11 are connected is formed with a curved surface, and the angle of the connecting portion 12 formed by the shearing portions 11 and 11 is an obtuse angle. Further, the reinforcing portions 13 and 13 at the tip portions of the shearing portions 11 and 11 are formed on the outside so as to form a series of arcuate curved surfaces with respect to the shearing portions 11 and 11. Furthermore, as shown in the examples of FIGS. 24A and 24B, the elastic-plastic hysteretic damper of the present invention has the connecting portion 12 formed in a cylindrical shape (see FIG. 16), and the shearing portions 11 and 11 are formed. The corners may be obtuse, and cylindrical reinforcing portions 13 and 13 may be formed at the distal ends of the shearing portions 11 and 11 (see FIG. 9).
[10.剪断部に貫通した孔及び/又はスリットを設けた変形例の説明]
ここでは、剪断部11,11に貫通した孔部を設けた変形例を、図2−図4で示した弾塑性履歴型ダンパ10を例に説明する。一つ又は複数の孔部を設けたときには、低降伏点鋼を用いなくても、通常の鋼材で同様な低降伏点を実現することが出来る。勿論、低降伏点鋼に前記孔部を形成して、降伏点や座屈点を調整するようにしても良い。
[10. Description of Modified Example Provided with Hole and / or Slit Penetrating Shear Part]
Here, a modified example in which a hole portion penetrating the shearing portions 11 and 11 will be described by taking the elastic-plastic hysteretic damper 10 shown in FIGS. 2 to 4 as an example. When one or a plurality of holes are provided, a similar low yield point can be realized with a normal steel material without using low yield point steel. Of course, the hole may be formed in the low yield point steel to adjust the yield point and the buckling point.
図25(A)及び(B)の例では、二つの剪断部11,11に、剪断部11,11とベースプレート14との接合部及び/又は剪断部11とプレート15との接合部となる側縁部を切り欠いた孔部21が断続して複数形成されている。孔部21は、ベースプレート14との接合部及び/又はプレート15との接合部に形成されることで、ベースプレート14との接合部及び/又はプレート15との溶接部分を減らすことが出来る。また、剪断部11,11は、複数の孔部21が形成されることによって、例えば剪断部11,11に低降伏点鋼を用いなくても、通常の鋼材で低降伏点鋼のような剪断変形をさせることが出来る。なお、孔部21の形状は、凹字型、半円型等どの様な形状であっても良い。また、孔部21の数や大きさは、用途に応じて適宜決定すればよい。また、孔部21は、剪断部11,11の連結部12及び/又は補強部13との境界の部分に形成するようにしても良い。 In the example of FIGS. 25A and 25B, the two shearing portions 11, 11 are connected to the shearing portions 11, 11 and the base plate 14 and / or the shearing portion 11 and the plate 15. A plurality of hole portions 21 having a cut-out edge portion are formed intermittently. The hole 21 is formed at the joint with the base plate 14 and / or the joint with the plate 15, thereby reducing the joint with the base plate 14 and / or the welded portion with the plate 15. Further, since the plurality of hole portions 21 are formed in the shearing portions 11 and 11, for example, even if the low yield point steel is not used for the shearing portions 11 and 11, the shearing portions 11 and 11 are made of a normal steel material like a low yield point steel. It can be deformed. The shape of the hole 21 may be any shape such as a concave shape or a semicircular shape. Moreover, what is necessary is just to determine suitably the number and magnitude | size of the hole part 21 according to a use. Further, the hole 21 may be formed at a boundary portion between the shearing portions 11 and 11 and the connecting portion 12 and / or the reinforcing portion 13.
図26(A)及び(B)は、図25の変形例であり、剪断部11,11とベースプレート14との接合部及び/又は剪断部11とプレート15との接合部となる側縁部に、スリット状の孔部22を形成するようにしている。また、剪断部11,11は、連結部12及び補強部13との境界の部分にもスリット状の孔部22を形成することも出来る。このような図26の例によっても、ベースプレート14との接合部及び/又はプレート15との溶接部分を減らすことが出来、また、剪断部11,11に低降伏点鋼を用いなくても、通常の鋼材で低降伏点鋼のような剪断変形をさせることが出来る。なお、孔部22を設ける位置は、これら四カ所の内少なくとも一カ所に設けるようにすれば、特に限定されるものではない。例えば、スリット状の孔部22は、縦二本でも良いし、横二本でも良い。また、各スリット状の孔部22は、長手方向の両側が円弧状を成していても良い。   FIGS. 26A and 26B are modifications of FIG. 25, and are provided at the side edge portion that becomes the joint portion between the shearing portions 11 and 11 and the base plate 14 and / or the joint portion between the shearing portion 11 and the plate 15. The slit-shaped hole 22 is formed. In addition, the shearing portions 11 and 11 can also form slit-like hole portions 22 at the boundary portions between the connecting portion 12 and the reinforcing portion 13. 26, it is possible to reduce the joint portion with the base plate 14 and / or the welded portion with the plate 15, and it is normal to use the low yield point steel for the shear portions 11 and 11. It is possible to cause shear deformation like low yield point steel. The position where the hole 22 is provided is not particularly limited as long as it is provided in at least one of these four places. For example, the slit-shaped hole 22 may be two vertically long or two horizontally wide. In addition, each slit-like hole 22 may have an arc shape on both sides in the longitudinal direction.
図27(A)及び(B)も、図25及び図26の変形例であり、剪断部11,11とベースプレート14との接合部及び/又は剪断部11とプレート15との接合部の一部となるコーナ部に、孔部23を形成するようにしている。このような図27の例によっても、ベースプレート14との接合部及び/又はプレート15との溶接部分を減らすことが出来、また、剪断部11,11に低降伏点鋼を用いなくても、通常の鋼材で低降伏点鋼のような剪断変形をさせることが出来る。なお、孔部23を設ける位置は、これら四カ所のうち少なくとも一カ所に設けるようにすれば、特に限定されるものではない。例えば、上二個でも良いし、下二個であっても良いし、前面側二個でも良いし、背面側二個でも良い。また、孔部23の形状は、扇状に限定されるものではなく、例えば矩形状であっても良い。 FIGS. 27A and 27B are also modifications of FIGS. 25 and 26, and are a part of the joint between the shearing portions 11 and 11 and the base plate 14 and / or the joint between the shearing portion 11 and the plate 15. The hole 23 is formed in the corner portion. 27, the joint portion with the base plate 14 and / or the welded portion with the plate 15 can be reduced, and even if the low yield point steel is not used for the shear portions 11 and 11, it is normal. It is possible to cause shear deformation like low yield point steel. The position where the hole 23 is provided is not particularly limited as long as it is provided in at least one of these four places. For example, the upper two pieces, the lower two pieces, the front side two pieces, or the back side two pieces may be used. Moreover, the shape of the hole part 23 is not limited to a fan shape, For example, a rectangular shape may be sufficient.
図28(A)及び(B)は、剪断部11,11の略中央部に、貫通した孔部24を形成することも出来る。このような図28の例によっても、剪断部11,11に低降伏点鋼を用いなくても、通常の鋼材で低降伏点鋼のような剪断変形をさせることが出来る。なお、孔部24の形状としては、円形の他、三角形、四角形、五角形等の多角形であっても良いし、十字状、×字状のスリットであっても良い。   In FIGS. 28A and 28B, a through hole 24 can be formed in the approximate center of the shearing portions 11 and 11. In the example of FIG. 28 as well, even if a low yield point steel is not used for the shearing portions 11 and 11, shear deformation like a low yield point steel can be performed with a normal steel material. The shape of the hole 24 may be a circle, a polygon such as a triangle, a quadrangle, or a pentagon, or a cross-shaped or X-shaped slit.
図29(A)及び(B)は、剪断部11,11の全体に、貫通した孔部25を形成する。このような図29の例によっても、剪断部11,11に低降伏点鋼を用いなくても、通常の鋼材で低降伏点鋼のような剪断変形をさせることが出来る。特に、剪断部11,11の全体に複数の孔部25を形成したときには、剪断変形に伴う座屈屈曲によるクロスクラックの発生を防止することが出来る。なお、孔部25のそれぞれの形状としては、円形の他、三角形、四角形、五角形等の多角形であっても良いし、十字状、X字状等のスリットであっても良いし、これらの組み合わせであっても良い。   29 (A) and 29 (B), a through hole 25 is formed in the entire shearing portion 11, 11. Even in the example of FIG. 29 as described above, even if the low yield point steel is not used for the shearing portions 11 and 11, shear deformation like the low yield point steel can be performed with a normal steel material. In particular, when a plurality of hole portions 25 are formed in the entire shearing portions 11, 11, it is possible to prevent the occurrence of cross cracks due to buckling and bending accompanying shear deformation. The shape of each hole 25 may be a circle, a polygon such as a triangle, a quadrangle, or a pentagon, or a slit such as a cross or an X, It may be a combination.
更に、図25や図26に示すように、剪断部11とベースプレート14との接合部及び/又は剪断部11とプレート15との接合部となる側縁部に、孔部21,22を設けた上で、更に、図28のような孔部24を中央部に設けても良いし、図29に示すように、剪断部11,11の全体に亘って複数の孔部25を設けるようにしても良い。   Further, as shown in FIG. 25 and FIG. 26, holes 21 and 22 are provided in the side edge portion that becomes the joint portion between the shearing portion 11 and the base plate 14 and / or the joint portion between the shearing portion 11 and the plate 15. In addition, a hole 24 as shown in FIG. 28 may be provided in the central part, or as shown in FIG. 29, a plurality of holes 25 may be provided over the entire shearing parts 11 and 11. Also good.
[11.弾塑性履歴型ダンパの変形例7の説明(連結部の省略)]
図2−図29に示した弾塑性履歴型ダンパ10は、二つの剪断部11,11を連結部12で連結して全体が一連となるように形成されているが、図30〜図39に示すように、連結部12を省略して、剪断部11,11の基端部を離間させるようにしても良い。
[11. Explanation of Modification 7 of Elastic-Plastic Hysteretic Damper (Omission of Connecting Portion)]
The elastic-plastic hysteretic damper 10 shown in FIGS. 2 to 29 is formed so that the two shearing portions 11 and 11 are connected by the connecting portion 12 to form a series, but FIGS. As shown, the connecting portion 12 may be omitted and the base end portions of the shearing portions 11 and 11 may be separated.
具体的に、図30に示す弾塑性履歴型ダンパ10は、剪断部11,11が二つ設けられており、二つの剪断部11,11の間隔が基端部側から先端部側に向かって鋭角状に漸次広がるように形成されている。すなわち、図30に示す弾塑性履歴型ダンパ10は、二つの剪断部11,11が向きを異ならせて設けられている。更に、図30に示す弾塑性履歴型ダンパ10は、剪断部11,11の先端部及び基端部に、剪断部11,11の厚さ方向の両側に張り出すように、補強部13,13を構成する平板状の補強板が溶接接合されて、剪断部11,11の両端形状がT字状を成すように形成されている。更に、図30に示す弾塑性履歴型ダンパ10は、剪断部11,11が相対するベースプレート14とプレート15間に固設されている。   Specifically, the elastic-plastic hysteretic damper 10 shown in FIG. 30 is provided with two shearing portions 11, 11, and the distance between the two shearing portions 11, 11 is from the proximal end side toward the distal end side. It is formed so as to gradually spread in an acute angle shape. That is, the elastoplastic hysteresis type damper 10 shown in FIG. 30 is provided with two shearing portions 11 and 11 in different directions. Furthermore, the elastic-plastic hysteretic damper 10 shown in FIG. 30 is provided with reinforcing portions 13 and 13 so as to protrude from both the ends of the shearing portions 11 and 11 in the thickness direction of the shearing portions 11 and 11. Are formed so that both end shapes of the shearing portions 11 and 11 form a T shape. Furthermore, the elastic-plastic hysteresis type damper 10 shown in FIG. 30 is fixed between the base plate 14 and the plate 15 with the shearing portions 11 and 11 facing each other.
以上のような図30に示す弾塑性履歴型ダンパ10であっても、剪断部11,11が二つ設けられているので、より大きな振動を吸収することができる。また、図30に示す弾塑性履歴型ダンパ10では、二つの剪断部11,11が向きを異ならせて設けられているので、橋軸方向に対して斜めの入力に対しても、剪断部11,11で減衰させることが出来る。   Even in the elastoplastic hysteresis type damper 10 shown in FIG. 30 as described above, since the two shearing portions 11 and 11 are provided, a larger vibration can be absorbed. In the elastic-plastic hysteretic damper 10 shown in FIG. 30, since the two shearing portions 11 and 11 are provided in different directions, the shearing portion 11 is also applied to an input oblique to the bridge axis direction. 11 can be attenuated.
なお、図31に示すように、弾塑性履歴型ダンパ10は、二つの剪断部11,11の間隔が基端部側から先端部側に向かって鈍角状に漸次広がるように形成しても良い。更に、図32に示すように、弾塑性履歴型ダンパ10は、二つの剪断部11,11が略直交してT字状を成すように形成しても良い。   As shown in FIG. 31, the elastic-plastic hysteretic damper 10 may be formed so that the distance between the two shearing portions 11 and 11 gradually increases in an obtuse shape from the proximal end side toward the distal end side. . Furthermore, as shown in FIG. 32, the elastic-plastic hysteretic damper 10 may be formed so that the two shearing portions 11 and 11 are substantially orthogonal to form a T shape.
更に、図33に示すように、弾塑性履歴型ダンパ10は、二つの剪断部11,11が向きを異ならせて設けられることに限定されるものではなく、二つの剪断部11,11の基端部から先端部に亘って平行で間隔が一定となるように形成しても良い。   Further, as shown in FIG. 33, the elastic-plastic hysteresis type damper 10 is not limited to the two shearing portions 11, 11 provided in different directions, and the base of the two shearing portions 11, 11 is not limited. You may form so that a space | interval may be fixed in parallel from an edge part to a front-end | tip part.
また、図34に示す弾塑性履歴型ダンパ10は、剪断部11,11が二つ設けられており、二つの剪断部11,11の間隔が基端部側に比して先端部側の方が狭くなるとともに、先端部側が内側に湾曲して、剪断部11,11が馬蹄状を成すように形成されている。すなわち、図34に示す弾塑性履歴型ダンパ10は、二つの剪断部11,11が向きを異ならせて設けられている。更に、図34に示す弾塑性履歴型ダンパ10は、剪断部11,11の先端部及び基端部に、剪断部11,11の厚さ方向の両側に張り出すように、補強部13,13を構成する平板状の補強板が溶接接合されて、剪断部11,11の両端形状がT字状を成すように形成されている。更に、図34に示す弾塑性履歴型ダンパ10は、剪断部11,11が相対するベースプレート14とプレート15間に固設されている。   Also, the elastic-plastic hysteretic damper 10 shown in FIG. 34 is provided with two shearing portions 11, 11, and the distance between the two shearing portions 11, 11 is closer to the distal end side than the proximal end side. Is narrowed, the tip side is curved inward, and the shearing portions 11, 11 are formed in a horseshoe shape. That is, the elastic-plastic hysteresis type damper 10 shown in FIG. 34 is provided with two shearing portions 11 and 11 having different directions. Further, the elastic-plastic hysteretic damper 10 shown in FIG. 34 is provided with reinforcing portions 13 and 13 so as to protrude from the distal end portion and the proximal end portion of the shearing portions 11 and 11 to both sides in the thickness direction of the shearing portions 11 and 11. Are formed so that both end shapes of the shearing portions 11 and 11 form a T shape. Furthermore, the elastic-plastic hysteresis type damper 10 shown in FIG. 34 is fixed between the base plate 14 and the plate 15 with the shearing portions 11 and 11 facing each other.
以上のような図34に示す弾塑性履歴型ダンパ10であっても、剪断部11,11が二つ設けられているので、より大きな振動を吸収することができる。また、図34に示す弾塑性履歴型ダンパ10では、二つの剪断部11,11が向きを異ならせて設けられているので、橋軸方向に対して斜めの入力に対しても、剪断部11,11で減衰させることが出来る。   Even the elasto-plastic hysteresis type damper 10 shown in FIG. 34 as described above is provided with two shearing portions 11 and 11, and therefore can absorb a larger vibration. In the elastic-plastic hysteretic damper 10 shown in FIG. 34, since the two shearing portions 11 and 11 are provided in different directions, the shearing portion 11 is also applied to an input oblique to the bridge axis direction. 11 can be attenuated.
なお、図35に示すように、弾塑性履歴型ダンパ10は、二つの剪断部11,11の基端部側の平行で間隔が一定となっているとともに、先端部側が内側に湾曲して、剪断部11,11がU字状を成すように形成しても良い。   In addition, as shown in FIG. 35, the elastic-plastic hysteresis type damper 10 is parallel to the base end portion side of the two shearing portions 11, 11, and has a constant interval, and the distal end portion is curved inward, You may form so that the shear parts 11 and 11 may comprise U shape.
また、図36に示す弾塑性履歴型ダンパ10は、剪断部11,11が二つ設けられており、二つの剪断部11,11の間隔が基端部側から先端部側に向かって鋭角状又は鈍角状に漸次広がるように形成されている。すなわち、図36に示す弾塑性履歴型ダンパ10は、二つの剪断部11,11が向きを異ならせて設けられている。更に、図36に示す弾塑性履歴型ダンパ10は、剪断部11,11の先端部に、外側にのみ張り出すように、補強部13b,13bを構成する平板状の補強板が溶接接合されて、剪断部11,11の先端形状がL字状を成すように形成されている。更に、図36に示す弾塑性履歴型ダンパ10は、剪断部11,11の基端部に、内側にのみ張り出すように、補強部13c,13cを構成する平板状の補強板が溶接接合されて、剪断部11,11の基端形状がL字状を成すように形成されている。更に、図36に示す弾塑性履歴型ダンパ10は、剪断部11,11が相対するベースプレート14とプレート15間に固設されている。   In addition, the elastic-plastic hysteretic damper 10 shown in FIG. 36 is provided with two shearing portions 11, 11, and the interval between the two shearing portions 11, 11 is an acute angle from the proximal end side toward the distal end side. Alternatively, it is formed so as to gradually spread in an obtuse angle. That is, the elastic-plastic hysteresis type damper 10 shown in FIG. 36 is provided with two shearing portions 11 and 11 having different directions. Furthermore, in the elastoplastic hysteresis type damper 10 shown in FIG. 36, flat reinforcing plates constituting the reinforcing portions 13b and 13b are welded and joined to the tip portions of the shearing portions 11 and 11 so as to project only outward. The tip of the shearing portions 11 and 11 is formed in an L shape. Furthermore, in the elastoplastic hysteresis type damper 10 shown in FIG. 36, flat reinforcing plates constituting the reinforcing portions 13c and 13c are welded to the base end portions of the shearing portions 11 and 11 so as to protrude only inward. The base ends of the shearing portions 11 and 11 are formed in an L shape. Furthermore, the elastic-plastic hysteretic damper 10 shown in FIG. 36 is fixed between the base plate 14 and the plate 15 facing the shearing portions 11 and 11.
以上のような図36に示す弾塑性履歴型ダンパ10であっても、剪断部11,11が二つ設けられているので、より大きな振動を吸収することができる。また、図36に示す弾塑性履歴型ダンパ10では、二つの剪断部11,11が向きを異ならせて設けられているので、橋軸方向に対して斜めの入力に対しても、剪断部11,11で減衰させることが出来る。   Even the elasto-plastic hysteresis type damper 10 shown in FIG. 36 as described above is provided with two shearing portions 11 and 11, and therefore can absorb a larger vibration. In the elastic-plastic hysteretic damper 10 shown in FIG. 36, since the two shearing portions 11 and 11 are provided in different directions, the shearing portion 11 is also applied to an input oblique to the bridge axis direction. 11 can be attenuated.
なお、弾塑性履歴型ダンパ10は、二つの剪断部11,11が向きを異ならせて設けられることに限定されるものではなく、図37に示すように、二つの剪断部11,11の基端部から先端部に亘って平行で間隔が一定となるように形成しても良い。   The elastic-plastic hysteretic damper 10 is not limited to the two shearing portions 11 and 11 provided in different directions. As shown in FIG. 37, the base of the two shearing portions 11 and 11 is provided. You may form so that a space | interval may be fixed in parallel from an edge part to a front-end | tip part.
また、図38に示す弾塑性履歴型ダンパ10は、剪断部11,11が二つ設けられており、二つの剪断部11,11の間隔が基端部側から先端部側に向かって鋭角状又は鈍角状に漸次広がるように形成されている。すなわち、図38に示す弾塑性履歴型ダンパ10は、二つの剪断部11,11が向きを異ならせて設けられている。更に、図38に示す弾塑性履歴型ダンパ10は、剪断部11,11の先端部及び基端部に、外側にのみ張り出すように、補強部13,13を構成する平板状の補強板が溶接接合されて、剪断部11,11がコ字状を成すように形成されている。更に、図38に示す弾塑性履歴型ダンパ10は、剪断部11,11が相対するベースプレート14とプレート15間に固設されている。   Further, the elastic-plastic hysteretic damper 10 shown in FIG. 38 is provided with two shearing portions 11, 11, and the interval between the two shearing portions 11, 11 is an acute angle shape from the proximal end side toward the distal end side. Alternatively, it is formed so as to gradually spread in an obtuse angle. That is, the elastic-plastic hysteresis type damper 10 shown in FIG. 38 is provided with two shearing portions 11 and 11 in different directions. Furthermore, the elastic-plastic hysteretic damper 10 shown in FIG. 38 has flat reinforcing plates constituting the reinforcing portions 13 and 13 so as to project only outward from the distal ends and the proximal ends of the shearing portions 11 and 11. By being welded, the shearing portions 11, 11 are formed in a U-shape. Further, the elastic-plastic hysteresis type damper 10 shown in FIG. 38 is fixed between the base plate 14 and the plate 15 with the shearing portions 11 and 11 facing each other.
以上のような図38に示す弾塑性履歴型ダンパ10であっても、剪断部11,11が二つ設けられているので、より大きな振動を吸収することができる。また、図38に示す弾塑性履歴型ダンパ10では、二つの剪断部11,11が向きを異ならせて設けられているので、橋軸方向に対して斜めの入力に対しても、剪断部11,11で減衰させることが出来る。   Even in the elasto-plastic hysteresis type damper 10 shown in FIG. 38 as described above, since the two shearing portions 11 and 11 are provided, a larger vibration can be absorbed. In the elastic-plastic hysteretic damper 10 shown in FIG. 38, since the two shearing portions 11 and 11 are provided in different directions, the shearing portion 11 is also applied to an input oblique to the bridge axis direction. 11 can be attenuated.
なお、弾塑性履歴型ダンパ10は、二つの剪断部11,11が向きを異ならせて設けられることに限定されるものではなく、図39に示すように、二つの剪断部11,11の基端部から先端部に亘って平行で間隔が一定となるように形成しても良い。   Note that the elastoplastic hysteresis damper 10 is not limited to the two shearing portions 11 and 11 being provided in different directions, and as shown in FIG. 39, the base of the two shearing portions 11 and 11 is provided. You may form so that a space | interval may be fixed in parallel from an edge part to a front-end | tip part.
なお、図30〜図39に示した弾塑性履歴型ダンパ10は、剪断部11,11が同一のベースプレート14とプレート15間に固設されることに限定されるものではなく、例えば、図40(A)及び図40(B)に示すように、一方の剪断部11が相対する第一のベースプレート14bと第一のプレート15b間に固設され、他方の剪断部11が相対する第二のベースプレート14cと第二のプレート15c間に固設されるようにしても良い。   The elastic-plastic hysteretic damper 10 shown in FIGS. 30 to 39 is not limited to the shearing portions 11 and 11 being fixed between the same base plate 14 and the plate 15. For example, FIG. As shown in FIG. 40A and FIG. 40B, one shearing portion 11 is fixed between the first base plate 14b and the first plate 15b facing each other, and the other shearing portion 11 is opposed to the second base plate 14b. It may be fixed between the base plate 14c and the second plate 15c.
この際、図40(A)に示すように、一方の剪断部11の長手方向が第一のベースプレート14bや第一のプレート15bの長手方向と異なるように設けるとともに、他方の剪断部11の長手方向が第二のベースプレート14cや第二のプレート15cの長手方向と異なるように設けるようにしても良く、図40(B)に示すように、略一致するように設けるようにしても良い。   At this time, as shown in FIG. 40A, the longitudinal direction of one shearing portion 11 is provided different from the longitudinal direction of the first base plate 14b or the first plate 15b, and the longitudinal direction of the other shearing portion 11 is provided. The direction may be provided so as to be different from the longitudinal direction of the second base plate 14c or the second plate 15c, or as shown in FIG. 40 (B).
更に、図41(A)及び図41(B)に示すように、図40(A)及び図40(B)に示した弾塑性履歴型ダンパ10は、更に、第一のベースプレート14bと第二のベースプレート14cがベースプレート14に固設され、第一のプレート15bと第二のプレート15cがプレート15に固設されるようにしても良い。   Furthermore, as shown in FIGS. 41A and 41B, the elastic-plastic hysteretic damper 10 shown in FIGS. 40A and 40B further includes a first base plate 14b and a second base plate 14b. The base plate 14 c may be fixed to the base plate 14, and the first plate 15 b and the second plate 15 c may be fixed to the plate 15.
更に、図30〜図41に示す弾塑性履歴型ダンパ10は、剪断部11,11の先端部及び基端部がT字状やL字状を成すように形成されることに限定されるものではなく、例えば、図9(A)及び図9(B)、図10(A)及び図10(B)、図11(A)〜図11(E)に示すように、他の形状及び形成方法で形成するようにしても良い。   Furthermore, the elastic-plastic hysteretic damper 10 shown in FIGS. 30 to 41 is limited to be formed such that the distal end and the proximal end of the shearing portions 11 and 11 are formed in a T shape or an L shape. Instead, for example, as shown in FIGS. 9 (A) and 9 (B), FIG. 10 (A) and FIG. 10 (B), and FIGS. 11 (A) to 11 (E), other shapes and formations are possible. It may be formed by a method.
[12.弾塑性履歴型ダンパの設置例の説明]
弾塑性履歴型ダンパ10は、図1及び図2に示した桁橋の他に、ビル鉄骨、橋梁、鉄道橋等にも用いることが出来る。例えば、図42(A)及び(B)に示すように、構造物のフレーム横梁や橋梁の横支材等51と、ブレース材53の一端が取り付けられ、鉄骨構造の節点に集まる部材相互の接合に用いるガセットプレート52との間(ダンパー配置箇所)に弾塑性履歴型ダンパ10を取り付けることが出来る。この場合、弾塑性履歴型ダンパ10は、剪断部11,11の間の方向からの水平力を、剪断部11,11が剪断塑性変形することにより減衰させることが出来る。
[12. Explanation of installation example of elastic-plastic hysteretic damper]
In addition to the girder bridge shown in FIGS. 1 and 2, the elastoplastic hysteresis type damper 10 can be used for building steel frames, bridges, railway bridges, and the like. For example, as shown in FIGS. 42 (A) and (B), the frame lateral beam of the structure, the lateral support member 51 of the bridge, and one end of the brace material 53 are attached, and the members gathered at the nodes of the steel structure are joined together. The elastic-plastic hysteretic damper 10 can be attached between the gusset plate 52 used for the above (damper-arranged portion). In this case, the elastic-plastic hysteretic damper 10 can attenuate the horizontal force from the direction between the shearing portions 11 and 11 by the shearing plastic deformation of the shearing portions 11 and 11.
1 上部構造物、1a 主桁、1b 横桁、2 下部構造物、3 支承装置、3a 固定支承装置、3b 可動支承装置、4 下部フランジ、10 弾塑性履歴型ダンパ、11(11a,11b) 剪断部、12 連結部、12a 連結片、12b 円筒体、12c 補強片、12d 補強片、13 補強部、13a 補強片、13b 補強部、13c 補強部、14 ベースプレート、15 プレート、15a 端面、16 ストッパ、17 補強部、17a 補強片、17b 補強片、21−25 孔部、51 構造物のフレーム横梁や橋梁の横支材等(横フレーム)、52 ガセットプレート、53 ブレース材、54 縦フレーム 1 upper structure, 1a main beam, 1b cross beams, 2 lower structure 3 bearing device 3a fixing bearing device, 3b mobile bearing device, 4 the lower flange, 10 Elastoplastic history damper, 11 (11a, 11b) Shearing part, 12 connecting part, 12a connecting piece, 12b cylindrical body, 12c reinforcing piece, 12d reinforcing piece, 13 reinforcing part, 13a reinforcing piece, 13b reinforcing part, 13c reinforcing part, 14 base plate, 15 plate, 15a end face, 16 stopper , 17 Reinforcement part, 17a Reinforcement piece, 17b Reinforcement piece, 21-25 Hole part, 51 Structure frame horizontal beam, bridge horizontal support material, etc. (horizontal frame), 52 Gusset plate, 53 Brace material, 54 Vertical frame

Claims (12)

  1. 建物及び/又は建造物に適用可能な弾塑性履歴型ダンパであって、
    一対の第一補強部と、
    前記一対の第一補強部を連結した板状の剪断部と、
    前記一対の第一補強部の両端間にそれぞれ接続した一対のプレートとを備え、
    前記剪断部は、前記第一補強部に対して傾斜を成し、
    前記剪断部は、前記剪断部が前記一対の第一補強部の一方から他方へ向かって延在する方向の一部と他部とで中心線の接線の方向が異なり、
    前記剪断部は、入力により荷重を受けたときに、変形してエネルギー吸収を行うことを特徴とする弾塑性履歴型ダンパ。
    An elastoplastic hysteretic damper applicable to buildings and / or buildings,
    A pair of first reinforcing portions;
    A plate-like shearing part connecting the pair of first reinforcing parts;
    A pair of plates respectively connected between both ends of the pair of first reinforcing portions,
    The shearing portion is inclined with respect to the first reinforcing portion,
    The shearing portion is different in the direction of the tangent line of the center line between a part of the direction in which the shearing part extends from one of the pair of first reinforcing parts toward the other and the other part,
    An elastic-plastic hysteretic damper, wherein the shearing part is deformed and absorbs energy when a load is received by input.
  2. 前記第一補強部は、互いに平行に配置されていることを特徴とする請求項1記載の弾塑性履歴型ダンパ。   The elastic-plastic hysteretic damper according to claim 1, wherein the first reinforcing portions are arranged in parallel to each other.
  3. 前記一対のプレートは、入力により互いに異なる方向に変位する第一構造物と第二構造物とにそれぞれ接合されていることを特徴とする請求項1又は2記載の弾塑性履歴型ダンパ。   3. The elastic-plastic hysteretic damper according to claim 1, wherein the pair of plates are respectively joined to a first structure and a second structure that are displaced in different directions by an input. 4.
  4. 前記剪断部は、平面状を成すことを特徴とする請求項1−3の何れかに記載の弾塑性履歴型ダンパ。   The elastic-plastic hysteretic damper according to any one of claims 1 to 3, wherein the shearing portion has a planar shape.
  5. 前記剪断部は、一対の板状の部材が連結部を介して一連に設けられていることを特徴とする請求項1−4の何れかに記載の弾塑性履歴型ダンパ。   The elastic-plastic hysteretic damper according to any one of claims 1 to 4, wherein the shearing portion includes a pair of plate-like members arranged in series via a connecting portion.
  6. 前記連結部は、前記剪断部と一体又は別体であることを特徴とする請求項5記載の弾塑性履歴型ダンパ。   6. The elastic-plastic hysteretic damper according to claim 5, wherein the connecting portion is integral with or separate from the shearing portion.
  7. 前記一対の板状の部材の間隔は、前記連結部側に比し、前記連結部とは反対側の端部の方が狭いことを特徴とする請求項5又は6記載の弾塑性履歴型ダンパ。   The elastic-plastic hysteretic damper according to claim 5 or 6, wherein an interval between the pair of plate-like members is narrower at an end opposite to the connecting portion than at the connecting portion side. .
  8. 前記一対の板状の部材の間隔は、前記連結部側から反対側の端部に向かって鋭角状に漸次広がるように形成されていることを特徴とする請求項5又は6記載の弾塑性履歴型ダンパ。   The elastoplastic history according to claim 5 or 6, wherein an interval between the pair of plate-like members is formed so as to gradually widen in an acute angle from the connecting portion side toward the opposite end portion. Type damper.
  9. 前記一対の板状の部材の間隔は、前記連結部側から反対側の端部に向かって鈍角状に漸次広がるように形成されていることを特徴とする請求項5又は6記載の弾塑性履歴型ダンパ。   7. The elastic-plastic history according to claim 5, wherein an interval between the pair of plate-like members is formed so as to gradually increase in an obtuse angle from the connecting portion side toward the opposite end portion. Type damper.
  10. 前記剪断部は、前記連結部と反対側の端部に前記第一補強部を有することを特徴とする請求項5−9の何れかに記載の弾塑性履歴型ダンパ。   10. The elastic-plastic hysteretic damper according to claim 5, wherein the shearing portion includes the first reinforcing portion at an end opposite to the connecting portion.
  11. 前記第一補強部は、前記剪断部と一体又は別体であることを特徴とする請求項10記載の弾塑性履歴型ダンパ。   The elastic-plastic hysteretic damper according to claim 10, wherein the first reinforcing portion is integrated with or separate from the shearing portion.
  12. 前記連結部は、第二補強部によって補強されていることを特徴とする請求項5−11の何れかに記載の弾塑性履歴型ダンパ。   The elastic-plastic hysteretic damper according to claim 5, wherein the connecting portion is reinforced by a second reinforcing portion.
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