JP2020029734A - Steel stairway, and construction method of steel stairway - Google Patents
Steel stairway, and construction method of steel stairway Download PDFInfo
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Abstract
Description
本発明は、鉄骨階段及び鉄骨階段の施工方法に関する。 The present invention relates to a steel staircase and a method for constructing a steel staircase.
建物の風居住性や耐震性を向上させるために、建物の柱梁躯体の左右の柱と上下の梁で囲まれたフレーム内において、一端が上下の梁の一方に支持され他端が他方の梁方向に伸びるブレースを設け、 該ブレースの他端と他方の梁との間にダンパーを介在させて上下の梁の相対水平 変位によってダンパーを作動させて制振する構造が知られている（例えば、特許文献１参照）。 In order to improve the wind habitability and seismic resistance of the building, one end is supported by one of the upper and lower beams and the other end is in the frame surrounded by the left and right columns and the upper and lower beams of the column-beam frame of the building. There is known a structure in which a brace extending in the beam direction is provided, and a damper is interposed between the other end of the brace and the other beam to actuate the damper by the relative horizontal displacement of the upper and lower beams (for example, a vibration damping structure). And Patent Document 1).
上記のような制振構造では、柱と上下の梁で囲まれたフレーム内に、ダンパーと軸剛性が高いブレースとを直列に繋いだ部材を設ける必要がある。このため、ダンパーを設ける位置は、平面計画と調整する必要があり、設計において意匠的、設備的な制約が生じ、制約が厳しい場合には、十分な制振部材を設けることができないという課題がある。 In such a vibration damping structure, it is necessary to provide a member in which a damper and a brace having high axial rigidity are connected in series in a frame surrounded by columns and upper and lower beams. For this reason, it is necessary to adjust the position where the damper is provided in accordance with the plan of the plan, and there is a design and facility restriction in the design, and when the restriction is severe, there is a problem that a sufficient damping member cannot be provided. is there.
本発明は、このような事情に鑑みてなされたものであり、平面計画の自由度を確保しつつもより高い制振性能を備えることが可能な鉄骨階段及び鉄骨階段の施工方法を提供することを目的とする。 The present invention has been made in view of such circumstances, and provides a steel staircase and a method of constructing a steel staircase capable of providing higher vibration damping performance while securing a degree of freedom in floor plan. With the goal.
かかる目的を達成するために本発明の鉄骨階段は、
上階床と下階床との間に設けられた鉄骨階段であって、
前記上階床と前記下階床とのうちの一方に固定された一方階段部と、
前記一方階段部と、前記上階床と前記下階床とのうちの他方とを接続する制振ユニットと、
を備え、
前記制振ユニットは、
前記一方階段部に固定された第１接合部材と、
前記他方に固定された第２接合部材と、
前記第１接合部材と前記第２接合部材との間に設けられた制振部材と、
を備えていることを特徴とする鉄骨階段である。
In order to achieve such an object, the steel frame staircase of the present invention comprises:
It is a steel staircase provided between the upper floor and the lower floor,
One staircase portion fixed to one of the upper floor and the lower floor,
The one staircase, a vibration damping unit that connects the other of the upper floor and the lower floor,
With
The vibration damping unit includes:
A first joining member fixed to the one step portion;
A second joining member fixed to the other,
A vibration damping member provided between the first joining member and the second joining member;
A steel staircase comprising:
このような鉄骨階段によれば、上階床と下階床とのうちの一方に固定された一方階段部と、上階床と下階床とのうちの他方とが制振ユニットにより接続されているので、上階床と下階床とに生じる相対変位を制振ユニットにより吸収させて制振することが可能である。また、制振ユニットは、一方階段部の上階床側または下階床側に配置されているので、建物の構面に備える必要がなく、平面計画に対する制約が発生しない。このため、平面計画の自由度を確保しつつもより高い制振性能を備えることが可能である。 According to such a steel staircase, the one staircase portion fixed to one of the upper floor and the lower floor, and the other of the upper floor and the lower floor are connected by the vibration damping unit. Therefore, it is possible to absorb the relative displacement generated on the upper floor and the lower floor by the vibration damping unit and dampen the vibration. Further, since the vibration damping unit is arranged on the upper floor side or the lower floor side of the one staircase, there is no need to prepare for the building surface, and there is no restriction on the floor plan. For this reason, it is possible to provide higher vibration suppression performance while securing the degree of freedom of the plan.
また、制振ユニットは、階段部に固定される第１接合部材と、上階床と下階床とのうちの他方に固定される第２接合部材との間に制振部材が設けられている構成なので、一方階段部に第１接合部材を固定し、上階床と下階床とのうちの他方に第２接合部材を固定することにより、一方階段部の上階床側または下階床側に制振ユニットを容易に備えることが可能である。 In the vibration damping unit, a vibration damping member is provided between a first joint member fixed to the stair portion and a second joint member fixed to the other of the upper floor and the lower floor. The first connecting member is fixed to one of the stairs, and the second connecting member is fixed to the other of the upper floor and the lower floor. It is possible to easily provide a vibration suppression unit on the floor side.
かかる鉄骨階段であって、
前記第２接合部材は、前記一方階段部と異なる他方階段部を介して前記他方に固定されており、
前記制振ユニットは、前記一方階段部と、前記他方階段部との間に位置する踊り場に設けられていることを特徴とする。
Such a steel staircase,
The second joining member is fixed to the other through a step other than the one step,
The vibration damping unit is provided at a landing located between the one staircase and the other staircase.
このような鉄骨階段によれば、上階床と下階床とのうちの一方に固定された一方階段部と、上階床と下階床とのうちの他方に固定された他方階段部とが制振ユニットにより接続されているので、上階床と下階床とに生じる相対変位を制振ユニットにより吸収させて制振することが可能である。また、制振ユニットは踊り場に配置されているので、建物の構面に備える必要がなく、平面計画に対する制約が発生しない。このため、平面計画の自由度を確保しつつもより高い制振性能を備えることが可能である。 According to such a steel staircase, one staircase portion fixed to one of the upper floor and the lower floor, and the other staircase portion fixed to the other of the upper floor and the lower floor. Are connected by the vibration damping unit, it is possible to absorb the relative displacement generated on the upper floor and the lower floor by the vibration damping unit and dampen the vibration. Further, since the vibration damping unit is arranged on the landing, it is not necessary to prepare the building surface, and there is no restriction on the floor plan. For this reason, it is possible to provide higher vibration suppression performance while securing the degree of freedom of the plan.
また、制振ユニットは、一方階段部に固定される第１接合部材と、他方階段部に固定される第２接合部材との間に制振部材が設けられている構成なので、一方階段部に第１接合部材を固定し、他方階段部に第２接合部材を固定することにより、踊り場に容易に備えることが可能である。 Further, since the vibration damping unit has a configuration in which the vibration damping member is provided between the first joining member fixed to the one stair portion and the second joining member fixed to the other stair portion, By fixing the first joining member and fixing the second joining member to the other step, it is possible to easily prepare for a landing.
かかる鉄骨階段であって、
前記第１接合部材は、前記一方階段部が備える一方踏板材の下方に配置される第１制振部材支持部を備え、
前記第２接合部材は、前記一方踏板材の下方に配置され、前記第１制振部材支持部と対面する第２制振部材支持部を備え、
前記第１制振部材支持部と前記第２制振部材支持部との間に前記制振部材が設けられている。
Such a steel staircase,
The first joining member includes a first damping member supporting portion disposed below one tread plate member provided in the one step portion,
The second joining member includes a second vibration damping member supporting portion that is disposed below the one tread plate member and faces the first vibration damping member supporting portion,
The vibration damping member is provided between the first vibration damping member support and the second vibration damping member support.
このような鉄骨階段によれば、第１接合部材が備える第１制振部材支持部及び第２接合部材が備える第２制振部材支持部は、いずれも一方踏板材の下方にて対面して設けられているので、第１接合部材と第２接合部材とが単に隣接している場合よりも、互いに対面する領域を広く設けることが可能である。また、制振部材は、第１制振部材支持部と第２制振部材支持部との間に設けられているので、より広い領域において制振部材を作用させることが可能である。このため、より高い制振性能を備えることが可能である。 According to such a steel frame staircase, the first vibration damping member support provided in the first joint member and the second vibration damping member support provided in the second joint member both face below one tread plate. Since it is provided, it is possible to provide a wider area facing each other than when the first joining member and the second joining member are simply adjacent to each other. Further, since the vibration damping member is provided between the first vibration damping member support portion and the second vibration damping member support portion, the vibration damping member can act on a wider area. For this reason, it is possible to provide higher damping performance.
かかる鉄骨階段であって、
前記第１制振部材支持部と前記第２制振部材支持部とのうちの一方は、上下方向に間隔を隔てて対面する一対の外板をなし、
前記第１制振部材支持部と前記第２制振部材支持部とのうちの他方は、前記一対の外板の間に介在される中板をなし、
前記一対の外板の各々と前記中板との間に前記制振部材が設けられていることを特徴とする。
Such a steel staircase,
One of the first vibration damping member support portion and the second vibration damping member support portion forms a pair of outer plates facing each other at an interval in a vertical direction,
The other of the first vibration damping member support and the second vibration damping member support forms a middle plate interposed between the pair of outer plates,
The vibration damping member is provided between each of the pair of outer plates and the middle plate.
このような鉄骨階段によれば、第１制振部材支持部と第２制振部材支持部とのうちの一方がなす一対の外板の各々と、第１制振部材支持部と第２制振部材支持部とのうちの他方がなす中板との間にそれぞれ制振部材が設けられているので、中板の両面において制振部材を作用させることが可能である。このため、更に高い制振性能を備えることが可能である。 According to such a steel frame stair, each of the pair of outer plates formed by one of the first and second damping member support portions, the first and second damping member support portions, and the second damping member support portion. Since the vibration damping members are provided between the vibration member supporting portion and the middle plate formed by the other of the vibration member supporting portions, the vibration damping members can act on both surfaces of the middle plate. For this reason, it is possible to provide higher damping performance.
また、上記鉄骨階段の施工方法であって、
前記上階床及び前記下階床を施工する躯体施工ステップと、
前記一方階段部を製造する階段部製造ステップと、
前記第１接合部材と前記第２接合部材との間に前記制振部材を介在させて前記制振ユニットを製造する制振ユニット製造ステップと、
前記上階床と前記下階床とのうちの一方に前記一方階段部を固定する階段部固定ステップと、
前記一方階段部に前記第１接合部材を固定し、前記上階床と前記下階床とのうちの前記他方に前記第２接合部材を固定する制振ユニット固定ステップと、
を有することを特徴とする鉄骨階段の施工方法である。
In addition, the construction method of the steel frame stairs,
A skeleton construction step of constructing the upper floor and the lower floor,
A step manufacturing step of manufacturing the one step,
A vibration damping unit manufacturing step of manufacturing the vibration damping unit by interposing the vibration damping member between the first joint member and the second joint member;
A staircase fixing step of fixing the one staircase to one of the upper floor and the lower floor,
A vibration damping unit fixing step of fixing the first joining member to the one stair portion, and fixing the second joining member to the other of the upper floor and the lower floor,
It is a construction method of steel frame stairs characterized by having.
このような鉄骨階段の施工方法によれば、上階床及び下階床と、一方階段部と、制振ユニットと、は別々のステップにて各々製造されるので、各々専門の作業者等により精度良く製造することが可能である。また、制振ユニットを予め工場等で製造するため、施工現場において制振ユニットを製造する必要がない。このため、現場での作業を削減して工期を短縮することが可能である。また、上階床及び下階床を含む建物躯体のある施工現場に、一方階段部と、制振ユニットと、を搬入し、上階床と下階床とのうちの一方に一方階段部を固定するとともに一方階段部に第１接合部材を固定し、上階床と下階床とのうちの他方に第２接合部材を固定することにより、高い制振性能を備えた鉄骨階段を建物躯体に設けることが可能である。 According to such a construction method of the steel stairs, the upper floor and the lower floor, the one staircase, and the vibration damping unit are each manufactured in separate steps, so that each of them is manufactured by a specialized worker or the like. It can be manufactured with high accuracy. Further, since the vibration damping unit is manufactured in advance at a factory or the like, it is not necessary to manufacture the vibration damping unit at the construction site. For this reason, work on site can be reduced and the construction period can be shortened. In addition, a staircase and a vibration damping unit are carried into a construction site having a building frame including the upper floor and the lower floor, and the one staircase is placed on one of the upper floor and the lower floor. By fixing the first joint member to one of the stairs and fixing the second joint member to the other of the upper floor and the lower floor, a steel frame staircase having high vibration damping performance can be formed. Can be provided.
また、上記鉄骨階段の施工方法であって、
前記上階床及び前記下階床を施工する躯体施工ステップと、
前記一方階段部及び前記他方階段部を製造する階段部製造ステップと、
前記第１接合部材と前記第２接合部材との間に前記制振部材を介在させて前記制振ユニットを製造する制振ユニット製造ステップと、
前記上階床と前記下階床とのうちの一方に前記一方階段部を固定し、前記上階床と前記下階床とのうちの他方に前記他方階段部を固定する階段部固定ステップと、
前記一方階段部に前記第１接合部材を固定し、前記他方階段部に前記第２接合部材を固定する制振ユニット固定ステップと、
を有することを特徴とする鉄骨階段の施工方法である。
In addition, the construction method of the steel frame stairs,
A skeleton construction step of constructing the upper floor and the lower floor,
A staircase manufacturing step of manufacturing the one staircase and the other staircase,
A vibration damping unit manufacturing step of manufacturing the vibration damping unit by interposing the vibration damping member between the first joint member and the second joint member;
A staircase fixing step of fixing the one staircase to one of the upper floor and the lower floor, and fixing the other staircase to the other of the upper floor and the lower floor; ,
A vibration damping unit fixing step of fixing the first joining member to the one stair portion and fixing the second joining member to the other stair portion;
It is a construction method of steel frame stairs characterized by having.
このような鉄骨階段の施工方法によれば、上階床及び下階床と、一方階段部及び他方階段部と、制振ユニットと、は別々のステップにて各々製造されるので、各々専門の作業者等により精度良く製造することが可能である。また、制振ユニットを予め工場等で製造するため、施工現場において制振ユニットを製造する必要がない。このため、現場での作業を削減して工期を短縮することが可能である。また、上階床及び下階床を含む建物躯体のある施工現場に、一方階段部及び他方階段部と、制振ユニットと、を搬入し、上階床と下階床とのうちの一方に一方階段部を固定するとともに当該一方階段部に第１接合部材を固定し、上階床と下階床とのうちの他方に他方階段部を固定するとともに当該他方階段部に第２接合部材を固定することにより、高い制振性能を備えた鉄骨階段を建物躯体に設けることが可能である。 According to such a construction method of the steel stairs, the upper floor and the lower floor, the one stair part and the other stair part, and the vibration damping unit are manufactured in separate steps, respectively, so that each of It can be manufactured with high precision by workers and the like. Further, since the vibration damping unit is manufactured in advance at a factory or the like, it is not necessary to manufacture the vibration damping unit at the construction site. For this reason, work on site can be reduced and the construction period can be shortened. In addition, one staircase and the other staircase, and a vibration damping unit are carried into a construction site having a building frame including the upper floor and the lower floor, and are placed on one of the upper floor and the lower floor. The one stair portion is fixed, the first joining member is fixed to the one stair portion, the other stair portion is fixed to the other of the upper floor and the lower floor, and the second joining member is fixed to the other stair portion. By fixing, it is possible to provide a steel frame staircase with high damping performance in the building frame.
本発明によれば、平面計画の自由度を確保しつつもより高い制振性能を備えることが可能な鉄骨階段及び鉄骨階段の施工方法を提供することが可能である。 ADVANTAGE OF THE INVENTION According to this invention, it is possible to provide the steel-frame staircase and the construction method of the steel-frame staircase which can provide higher damping performance, ensuring the degree of freedom of a plane plan.
以下、本発明の鉄骨階段を、図を用いて説明する。
本実施形態では、複数の階床を備える鉄骨造の建物の階床間に設けられている鉄骨階段を例に挙げて説明する。
Hereinafter, a steel frame staircase of the present invention will be described with reference to the drawings.
In this embodiment, a steel staircase provided between floors of a steel frame building having a plurality of floors will be described as an example.
第１実施形態の鉄骨階段１は、図１〜図３に示すように、上下に位置する２つの階床１０ａ、１０ｂ間に設けられており、上に位置する上階床１０ａに固定されている上階床階段部２と、下に位置する下階床１０ｂに固定されている下階床階段部３と、踊り場４に設けられ上階床階段部２と下階床階段部３とを接続する制振ユニット５と、を有している。 As shown in FIGS. 1 to 3, the steel frame staircase 1 of the first embodiment is provided between two upper and lower floors 10 a and 10 b, and is fixed to the upper floor 10 a located above. Upper floor staircase 2 which is located below, lower floor staircase 3 fixed to lower floor 10b located below, and upper floor staircase 2 and lower floor staircase 3 provided in landing 4 And a vibration damping unit 5 to be connected.
鉄骨階段１は、上階床１０ａと下階床１０ｂとのうちの一方である上階床１０ａに固定された一方階段部としての上階床階段部２と、上階床１０ａと下階床１０ｂとのうちの他方である下階床１０ｂに固定された他方階段部としての下階床階段部３とが、それらの間に位置する踊り場４にて折り返す構造をなしており、踊り場４の下方にて上階床階段部２と下階床階段部３とが制振ユニット５により接続されている。すなわち、制振ユニット５は、上階床階段部２と異なる下階床階段部３を介して、上階床１０ａと下階床１０ｂとのうちの他方である下階床１０ｂに固定されている。 The steel-frame staircase 1 includes an upper-floor staircase 2 that is fixed to the upper-floor floor 10a, which is one of the upper-floor floor 10a and the lower-floor floor 10b, and an upper-floor floor 10a and a lower-floor floor. The lower floor staircase 3 as the other staircase fixed to the lower floor 10b which is the other of the floor 10b and the lower floor 10b has a structure that is folded back at a landing 4 located therebetween. Below, the upper floor staircase 2 and the lower floor staircase 3 are connected by a vibration damping unit 5. That is, the vibration damping unit 5 is fixed to the lower floor 10b which is the other of the upper floor 10a and the lower floor 10b via the lower floor stair 3 different from the upper floor stair 2. I have.
上階床階段部２は、複数の段板でなる踏み面を有する上階段本体２０と、上階段本体２０の幅方向における両端に設けられている上桁２１と、上階段本体２０が有する最下段の蹴上の下端と繋がった、一方踏板材としての上踊場踏板材２２と、を有している。上桁２１は、上階段本体２０の側部から上踊場踏板材２２の側部まで繋がっており、上踊場踏板材２２の側部では上踊場踏板材２２よりも下方に延出された上桁垂壁部２３を有している。 The upper-floor staircase 2 includes an upper staircase body 20 having a tread surface composed of a plurality of step boards, upper girders 21 provided at both ends in the width direction of the upper staircase main body 20, and an upper staircase main body 20. And an upper landing tread 22 as one tread connected to the lower end of the lower rise. The upper girder 21 is connected from the side of the upper staircase body 20 to the side of the upper landing tread 22, and the upper girder extends below the upper landing tread 22 at the side of the upper landing tread 22. It has a vertical wall portion 23.
下階床階段部３は、複数の段板でなる踏み面を有する下階段本体３０と、下階段本体３０の幅方向における両端に設けられている下桁３１と、下階段本体３０が有する最上段をなす踊り場４の下踊場踏板材３２と、を有している。下桁３１は、下階段本体３０の側部から下踊場踏板材３２の側部まで繋がっており、下踊場踏板材３２の側部では下踊場踏板材３２よりも下方に延出された下桁垂壁部３３を有している。 The lower floor staircase 3 includes a lower staircase main body 30 having a tread surface composed of a plurality of step boards, a lower girder 31 provided at both ends in the width direction of the lower staircase main body 30, and a lower staircase main body 30. And a lower landing tread 32 of the landing 4 forming the upper stage. The lower girder 31 is connected from the side of the lower staircase main body 30 to the side of the lower landing tread 32, and the lower girder extends below the lower landing tread 32 at the side of the lower landing tread 32. It has a vertical wall portion 33.
上踊場踏板材２２と下踊場踏板材３２とは、階段の往来方向と交差する階段の幅方向に並べられて踊り場４をなすように配置されている。すなわち、上階床階段部２を下ってきたときに踊り場４において上階床階段部２の先に広がる領域を上踊場踏板材２２が被い、下階床階段部３を上ってきたときに踊り場４において下階床階段部３の先に広がる領域を下踊場踏板材３２が被っている。上踊場踏板材２２と下踊場踏板材３２とは、直接繋がることなく、上階床階段部２及び下階床階段部３の幅方向（以下、単に幅方向という）に隣り合って並べられて踊り場４の床面をなしている。 The upper landing tread 22 and the lower landing tread 32 are arranged side by side in the width direction of the stairs that intersects the direction of the stairs to form the landing 4. That is, when descending on the upper floor staircase 2, the area extending beyond the upper floor staircase 2 in the landing 4 is covered by the upper landing tread material 22 and climbing up the lower floor staircase 3. In the landing 4, a region extending beyond the lower-floor staircase 3 is covered with a lower landing tread 32. The upper landing tread material 22 and the lower landing tread material 32 are arranged side by side in the width direction (hereinafter, simply referred to as width direction) of the upper floor staircase 2 and the lower floor staircase 3 without being directly connected. It forms the floor of landing 4.
踊り場４の下方には、建物躯体１０をなす柱梁架構において下階床１０ｂを構成する大梁１０ｃから繋がった受け梁１０ｄが、幅方向に沿って２本設けられている。受け梁１０ｄは、幅方向と直交する、上階床階段部２と下階床階段部３の往来方向（以下、単に往来方向という）に間隔を隔てて踊り場４の両端側に設けられている。 Below the landing 4, two receiving beams 10d are provided along the width direction in the column-beam frame forming the building frame 10 and connected to the large beams 10c forming the lower floor 10b. The receiving beams 10d are provided at both ends of the landing 4 at intervals in the traffic direction (hereinafter simply referred to as traffic direction) of the upper floor staircase 2 and the lower floor staircase 3 which are orthogonal to the width direction. .
各受け梁１０ｄの上面には、板状の踏板材支持部１１が上方に突出させて設けられている。踏板材支持部１１は、受け梁１０ｄと直交する方向に板面が沿い、上方に設けられている上踊場踏板材２２の上桁垂壁部２３または下踊場踏板材３２の下桁垂壁部３３と隣接して対面する位置に設けられている。上桁垂壁部２３または下桁垂壁部３３は、隣接する踏板材支持部１１と各々ボルト・ナットにより接合されている。 On the upper surface of each receiving beam 10d, a plate-like tread support member 11 is provided so as to protrude upward. The tread supporting member 11 has a plate surface extending in a direction orthogonal to the receiving beam 10d, and an upper girder vertical wall portion 23 or a lower girder vertical wall portion of an upper landing tread material 32 provided above. It is provided at a position adjacent to and facing 33. The upper spar vertical wall portion 23 or the lower spar vertical wall portion 33 is joined to the adjacent tread support member 11 by bolts and nuts.
踏板材支持部１１には、図１に示すように、ボルトが挿通され水平方向に長い長孔１１ａが設けられており、上桁垂壁部２３を備える上階床階段部２及び下桁垂壁部３３を備える下階床階段部３は、受け梁１０ｄが設けられている建物躯体１０と水平方向に相対移動可能に構成されている。 As shown in FIG. 1, the tread-plate supporting portion 11 is provided with a horizontally elongated slot 11 a through which a bolt is inserted, and the upper-floor staircase 2 having the upper-girder hanging wall portion 23 and the lower-girder hanging. The lower floor staircase 3 including the wall 33 is configured to be relatively movable in the horizontal direction with the building frame 10 provided with the receiving beam 10d.
制振ユニット５は、上踊場踏板材２２及び下踊場踏板材３２と受け梁１０ｄとの間に設けられている。
制振ユニット５は、図３〜図５に示すように、上階床階段部２の上踊場踏板材２２の側部から垂設されている上桁垂壁部２３と繋がる第１接合部材５０と、下階床階段部３の下踊場踏板材３２の側部から垂設されている下桁垂壁部３３と繋がる第２接合部材５１と、第１接合部材５０と第２接合部材５１との間に介在される制振部材としての粘弾性体５２と、を有している。
The vibration damping unit 5 is provided between the upper landing tread material 22 and the lower landing tread material 32 and the receiving beam 10d.
As shown in FIGS. 3 to 5, the vibration damping unit 5 includes a first joining member 50 that is connected to the upper girder wall portion 23 that is vertically provided from the side of the upper landing tread plate member 22 of the upper floor staircase 2. A second joining member 51 connected to the lower girder vertical wall portion 33 that is suspended from the side of the lower landing tread plate member 32 of the lower floor staircase portion 3, a first joining member 50, and a second joining member 51; And a viscoelastic body 52 as a vibration damping member interposed therebetween.
第１接合部材５０は、上踊場踏板材２２と下踊場踏板材３２とが並べられた踊り場４のほぼ全領域の広さを備える平板状の第１制振部材支持部５０ａと、第１制振部材支持部５０ａの幅方向における上階床階段部２側の端部と中央近傍とに設けられ、上方に延出されて上桁垂壁部２３と接合される第１端部接合片５０ｂ及び第１中央接合片５０ｃと、を有している。 The first joining member 50 includes a flat first damping member supporting portion 50a having a width of substantially the entire area of the landing 4 on which the upper landing tread material 22 and the lower landing tread material 32 are arranged, and a first damping member. A first end joint piece 50b which is provided at an end of the vibration member supporting portion 50a on the upper floor staircase portion 2 side in the width direction and near the center, extends upward and is joined to the upper spar vertical wall portion 23. And a first central joining piece 50c.
第１端部接合片５０ｂ及び第１中央接合片５０ｃは、上方に延出されている板状の部材であり、板面が往来方向に沿うように設けられている。第１制振部材支持部５０ａは、第１端部接合片５０ｂと第１中央接合片５０ｃとの間に位置する第１接合片間部位５０ｄと、第１中央接合片５０ｃよりも、第１端部接合片５０ｂとは反対側に張り出している第１張り出し部位５０ｅと、を有している。 The first end joining piece 50b and the first central joining piece 50c are plate-like members extending upward, and are provided such that the plate surfaces are along the traffic direction. The first vibration damping member supporting portion 50a is located between the first end joining piece 50b and the first center joining piece 50c and is located between the first joining piece 50d and the first center joining piece 50c. And a first projecting portion 50e projecting on the opposite side to the end joining piece 50b.
第２接合部材５１は、上踊場踏板材２２と下踊場踏板材３２とが並べられた踊り場４のほぼ全領域の広さを備える平板状をなす２枚の第２制振部材支持部５１ａと、第２制振部材支持部５１ａの幅方向における下階床階段部３側の端部と中央近傍とに設けられ上方に延出され下桁垂壁部３３と接合される第２端部接合片５１ｂ及び第２中央接合片５１ｃと、を有している。２枚の第２制振部材支持部５１ａは、上下方向に間隔を隔てて対面しており、第２端部接合片５１ｂ及び第２中央接合片５１ｃにより上下方向の間隔が隔てられている。図５において、上側の第２制振部材支持部５１ａに設けられている第２端部接合片５１ｂ及び第２中央接合片５１ｃと、下側の第２制振部材支持部５１ａに設けられている第２端部接合片５１ｂ及び第２中央接合片５１ｃとは、単一の部材である。 The second joining member 51 includes two flat second vibration-damping member supporting portions 51a having a width of almost the entire area of the landing 4 on which the upper landing tread 22 and the lower landing tread 32 are arranged. A second end joint provided at the end on the side of the lower floor staircase 3 in the width direction of the second damping member supporting portion 51a and in the vicinity of the center, extending upward and joined to the lower girder vertical wall portion 33 Piece 51b and a second central joining piece 51c. The two second vibration-damping member support portions 51a face each other at an interval in the vertical direction, and are separated from each other by the second end joining piece 51b and the second central joining piece 51c. In FIG. 5, the second end joining piece 51b and the second central joining piece 51c provided on the upper second vibration damping member supporting portion 51a and the lower second damping member supporting portion 51a are provided on the lower second damping member supporting portion 51a. The second end joining piece 51b and the second central joining piece 51c are a single member.
第２端部接合片５１ｂ及び第２中央接合片５１ｃは、上方に延出されている板状の部材であり、板面が往来方向に沿うように設けられている。第２制振部材支持部５１ａは、第２端部接合片５１ｂと第２中央接合片５１ｃとの間に位置する第２接合片間部位５１ｄと、第２中央接合片５１ｃよりも、第２端部接合片５１ｂとは反対側に張り出している第２張り出し部位５１ｅと、を有している。 The second end joining piece 51b and the second central joining piece 51c are plate-like members extending upward, and are provided so that the plate surfaces are along the traffic direction. The second damping member supporting portion 51a is located between the second end joining piece 51b and the second center joining piece 51c and between the second joining piece 51d and the second center joining piece 51c. A second projecting portion 51e projecting to the opposite side to the end joining piece 51b.
第１制振部材支持部５０ａは、第２接合部材５１が有する２枚の第２制振部材支持部５１ａ間に挿入されている。このとき、第１制振部材支持部５０ａ及び２枚の第２制振部材支持部５１ａには、受け梁１０ｄの上面に設けられた踏板材支持部１１、第１中央接合片５０ｃ、及び、第２中央接合片５１ｃが挿通され、往来方向に長いスリット５０ｆ、５１ｆが、設けられている。スリット５０ｆ、５１ｆは、幅方向における中央近傍であって、往来方向において上階床階段部２及び下階床階段部３側（以下、単に階段部側という）と、その反対側（以下、単に反階段部側という）とにそれぞれ２つずつ設けられている。 The first damping member supporting portion 50a is inserted between the two second damping member supporting portions 51a of the second joining member 51. At this time, the first vibration-damping member supporting portion 50a and the two second vibration-damping member supporting portions 51a have the tread plate material supporting portion 11 provided on the upper surface of the receiving beam 10d, the first central joining piece 50c, and The second central joining piece 51c is inserted, and slits 50f and 51f long in the traffic direction are provided. The slits 50f, 51f are located near the center in the width direction, and the upper floor staircase 2 and the lower floor staircase 3 side (hereinafter, simply referred to as “staircase side”) and the opposite side (hereinafter, simply “staircase”) in the traffic direction. And two on the opposite side.
階段部側と反階段部側とにそれぞれ設けられた２つのスリット５０ｆ、５１ｆは、幅方向に間隔を隔てて設けられており、制振ユニット５の状態では、幅方向において上階床階段部２側のスリット５０ｆ、５１ｆには、第１制振部材支持部５０ａと繋がった第１中央接合片５０ｃが挿通されており、下階床階段部３側のスリット５０ｆ、５１ｆには、２枚の第２制振部材支持部５１ａと繋がった第２中央接合片５１ｃが挿通されている。 The two slits 50f and 51f provided on the stair part side and the counter-stair part side are provided at intervals in the width direction, and in the state of the vibration damping unit 5, the upper floor stair part in the width direction. The first central joining piece 50c connected to the first damping member supporting portion 50a is inserted into the slits 50f and 51f on the second side, and two slits 50f and 51f on the side of the lower floor staircase 3 are inserted into the slits 50f and 51f. The second central joining piece 51c connected to the second vibration damping member supporting portion 51a is inserted.
第１制振部材支持部５０ａが２枚の第２制振部材支持部５１ａ間に挿入されている状態では、第１接合片間部位５０ｄの上下に２枚の第２制振部材支持部５１ａの第２張り出し部位５１ｅが位置し、第１張り出し部位５０ｅの上下に２枚の第２制振部材支持部５１ａの第２接合片間部位５１ｄが位置している。 In a state where the first damping member supporting portion 50a is inserted between the two second damping member supporting portions 51a, the two second damping member supporting portions 51a are provided above and below the first joint piece interposition portion 50d. The second overhang portion 51e is located above and below the first overhang portion 50e, and the second inter-joint piece portions 51d of the two second damping member support portions 51a are located above and below the first overhang portion 50e.
２枚の第２制振部材支持部５１ａ間に挿入された第１制振部材支持部５０ａの上面と、上側の第２制振部材支持部５１ａとは、板状の粘弾性体５２を介して接合されており、第１制振部材支持部５０ａの下面と、下側の第２制振部材支持部５１ａとは、板状の粘弾性体５２を介して接合されている。 The upper surface of the first damping member support portion 50a inserted between the two second damping member support portions 51a and the upper second damping member support portion 51a are interposed via a plate-shaped viscoelastic body 52. The lower surface of the first damping member support 50a and the lower second damping member support 51a are joined via a plate-shaped viscoelastic body 52.
制振ユニット５は、幅方向における上階床階段部２側の端部に、第１制振部材支持部５０ａと繋がった第１端部接合片５０ｂが位置しており、幅方向における下階床階段部３側の端部に、第２制振部材支持部５１ａと繋がった第２端部接合片５１ｂが位置している。また、中央近傍に設けられているスリット５０ｆ、５１ｆからは、第１中央接合片５０ｃ及び第２中央接合片５１ｃが上方に突出している。 The vibration damping unit 5 has a first end joining piece 50b connected to the first vibration damping member supporting portion 50a at an end on the upper floor staircase portion 2 side in the width direction, and the lower floor in the width direction. A second end joining piece 51b connected to the second damping member supporting portion 51a is located at the end on the floor stair portion 3 side. In addition, the first central joint piece 50c and the second central joint piece 51c protrude upward from the slits 50f, 51f provided near the center.
制振ユニット５は、幅方向において踊り場４の端部側に位置して上桁垂壁部２３及び下桁垂壁部３３と接合されている踏板材支持部１１の間に配置されている。このため、受け梁１０ｄの幅方向において中央側に設けられている４つの踏板材支持部１１は、第１制振部材支持部５０ａ及び第２制振部材支持部５１ａに設けられているスリット５０ｆ、５１ｆに挿通されている。 The vibration damping unit 5 is disposed between the tread support member 11 which is located on the end side of the landing 4 in the width direction and is joined to the upper spar vertical wall portion 23 and the lower spar vertical wall portion 33. For this reason, the four tread support members 11 provided on the center side in the width direction of the receiving beam 10d are provided with the slits 50f provided in the first damping member supporting portion 50a and the second damping member supporting portion 51a. , 51f.
内側に上階段本体２０が設けられている一対の上桁垂壁部２３は、外側に当接された踏板材支持部１１と水平方向に相対移動可能に接合されており、内側に制振ユニット５の第１端部接合片５０ｂと第１中央接合片５０ｃとが固定されている。内側に下階段本体３０が設けられている一対の下桁垂壁部３３は、外側に当接された踏板材支持部１１と水平方向に相対移動可能に接合されており、内側に制振ユニット５の第２端部接合片５１ｂと第２中央接合片５１ｃとが固定されている。 A pair of upper spar vertical wall portions 23 provided with the upper staircase main body 20 on the inside are joined to the tread plate support portion 11 abutted on the outside so as to be relatively movable in the horizontal direction, and the vibration damping unit is provided on the inside. 5, the first end joining piece 50b and the first center joining piece 50c are fixed. A pair of lower spar vertical wall portions 33 in which the lower staircase main body 30 is provided are joined to the tread plate support portion 11 abutted on the outside so as to be relatively movable in the horizontal direction, and a vibration damping unit is provided on the inside. 5 and the second end joining piece 51b and the second central joining piece 51c are fixed.
鉄骨階段１は、鉄骨階段１が備えられている階床１０ａ、１０ｂ間に、風や地震等により層間変位が生じると、上階床１０ａと繋がった上階床階段部２の上踊場踏板材２２、上桁垂壁部２３、第１端部接合片５０ｂ及び第１中央接合片５０ｃを介して繋がった第１制振部材支持部５０ａと、下階床１０ｂと繋がった下階床階段部３の下踊場踏板材３２、下桁垂壁部３３、第２端部接合片５１ｂ及び第２中央接合片５１ｃを介して繋がった第２制振部材支持部５１ａとが相対変位することにより、第１制振部材支持部５０ａと第２制振部材支持部５１ａの間に設けられている粘弾性体５２により振動エネルギーが吸収される。 The steel staircase 1 is an upper landing stair plate material connected to the upper floor 10a when an interlayer displacement occurs between the floors 10a and 10b provided with the steel stair 1 due to wind, earthquake, or the like. 22, the upper spar vertical wall portion 23, the first vibration damping member supporting portion 50a connected via the first end connecting piece 50b and the first central connecting piece 50c, and the lower floor stair portion connected to the lower floor 10b. 3, the lower landing tread material 32, the lower girder vertical wall 33, the second end joining piece 51b, and the second central damping piece 51c connected via the second center joining piece 51c are displaced relative to each other, Vibration energy is absorbed by the viscoelastic body 52 provided between the first vibration damping member support 50a and the second vibration damping member support 51a.
第１実施形態の鉄骨階段１によれば、上階床１０ａに固定された上階床階段部２と、下階床１０ｂに固定された下階床階段部３とが制振ユニット５により接続されているので、上階床１０ａと下階床１０ｂとに生じる相対変位を制振ユニット５により吸収させて制振することが可能である。また、制振ユニット５は踊り場４の下方に配置されているので、建物の構面に備える必要がなく、平面計画に対する制約が発生しない。このため、平面計画の自由度を確保しつつもより高い制振性能を備えることが可能である。 According to the steel frame staircase 1 of the first embodiment, the upper floor staircase 2 fixed to the upper floor 10a and the lower floor staircase 3 fixed to the lower floor 10b are connected by the vibration damping unit 5. Therefore, the relative displacement generated between the upper floor 10a and the lower floor 10b can be absorbed by the vibration damping unit 5 to control the vibration. Further, since the vibration damping unit 5 is disposed below the landing 4, there is no need to prepare the building surface, and there is no restriction on the floor plan. For this reason, it is possible to provide higher vibration suppression performance while securing the degree of freedom of the plan.
また、制振ユニット５は、上階床階段部２に固定される第１接合部材５０と、下階床階段部３に固定される第２接合部材５１との間に粘弾性体５２が設けられている構成なので、上階床階段部２に第１接合部材５０を固定し、下階床階段部３に第２接合部材５１を固定することにより、制振ユニット５を踊り場４に容易に備えることが可能である。 In the vibration damping unit 5, a viscoelastic body 52 is provided between a first joining member 50 fixed to the upper floor staircase 2 and a second joining member 51 fixed to the lower floor staircase 3. Since the first joint member 50 is fixed to the upper-floor staircase 2 and the second joint member 51 is fixed to the lower-floor staircase 3, the vibration damping unit 5 can be easily mounted on the landing 4. It is possible to provide.
また、第１接合部材５０が備える第１制振部材支持部５０ａ及び第２接合部材５１が備える第２制振部材支持部５１ａは、いずれも上踊場踏板材２２及び下踊場踏板材３２の下方にて上下方向に対面して設けられているので、第１接合部材５０と第２接合部材５１とが幅方向において単に隣接している場合よりも、互いに対面する領域を広く設けることが可能である。また、粘弾性体５２は、第１制振部材支持部５０ａと第２制振部材支持部５１ａとの間に設けられているので、より広い領域において粘弾性体５２を作用させることが可能である。このため、より高い制振性能を備えることが可能である。 The first damping member supporting portion 50a of the first joining member 50 and the second damping member supporting portion 51a of the second joining member 51 are both below the upper landing tread material 22 and the lower landing tread material 32. Since the first joint member 50 and the second joint member 51 are provided so as to face each other in the vertical direction, it is possible to provide a wider area facing each other than when the first joint member 50 and the second joint member 51 are simply adjacent to each other in the width direction. is there. In addition, since the viscoelastic body 52 is provided between the first vibration damping member support 50a and the second vibration damping member support 51a, the viscoelastic body 52 can act on a wider area. is there. For this reason, it is possible to provide higher damping performance.
また、２枚の第２制振部材支持部５１ａがなす一対の外板の各々と、第１制振部材支持部５０ａがなす中板との間にそれぞれ粘弾性体５２が設けられているので、中板の両面において粘弾性体５２を作用させることが可能である。このため、更に高い制振性能を備えることが可能である。 Further, since the viscoelastic body 52 is provided between each of the pair of outer plates formed by the two second damping member supporting portions 51a and the middle plate formed by the first damping member supporting portion 50a. It is possible to make the viscoelastic body 52 act on both surfaces of the middle plate. For this reason, it is possible to provide higher damping performance.
第１実施形態の鉄骨階段１が備える制振ユニット５は、第１制振部材支持部５０ａ及び第２制振部材支持部５１ａのほぼ全域が対面して粘弾性体５２が設けられている例について説明したが、これに限るものではない。例えば、上踊場踏板材２２または下踊場踏板材３２のいずれかの下方またはそれらの一部において、第１制振部材支持部５０ａ及び第２制振部材支持部５１ａが対面している部位に粘弾性体５２が設けられていてもよい。また、第１接合部材５０と第２接合部材５１とが対面する部位は、水平面に限らず、鉛直面であっても、上踊場踏板材２２または下踊場踏板材３２の下方に配置されていれば構わない。 The vibration damping unit 5 included in the steel frame staircase 1 according to the first embodiment has an example in which the viscoelastic body 52 is provided so that substantially the entire area of the first vibration damping member supporting portion 50a and the second vibration damping member supporting portion 51a face each other. However, the present invention is not limited to this. For example, below or in part of either the upper landing tread material 22 or the lower landing tread material 32, the portion where the first vibration damping member supporting portion 50a and the second vibration damping member supporting portion 51a face each other has a viscosity. An elastic body 52 may be provided. Further, the portion where the first joining member 50 and the second joining member 51 face each other is not limited to a horizontal plane, and may be disposed below the upper landing stepping plate member 22 or the lower landing point stepping plate member 32 even in a vertical plane. It does not matter.
第１実施形態の鉄骨階段１の施工方法は、図６に示すように、まず、上階床階段部２及び下階床階段部３を各々工場等により製造し（階段部製造ステップＳ１）、第１接合部材５０と第２接合部材５１との間に粘弾性体５２を備えた制振ユニット５を工場等により製造する（制振ユニット製造ステップＳ２）。 As shown in FIG. 6, the construction method of the steel staircase 1 of the first embodiment firstly manufactures an upper floor staircase 2 and a lower floor staircase 3 at a factory or the like (staircase manufacturing step S1). The vibration damping unit 5 including the viscoelastic body 52 between the first joint member 50 and the second joint member 51 is manufactured at a factory or the like (vibration damping unit manufacturing step S2).
次に、上階床階段部２、下階床階段部３、及び、制振ユニット５を、上階床１０ａ及び下階床１０ｂを備える建物躯体１０を施工した（躯体施工ステップＳ３）施工現場に搬入する。 Next, the construction site where the upper floor staircase 2, the lower floor staircase 3, and the vibration damping unit 5 are constructed on the building frame 10 including the upper floor 10a and the lower floor 10b (frame construction step S3). Carry in.
次に、搬入された上階床階段部２を上階床１０ａに、下階床階段部３を下階床１０ｂに、それぞれ固定するとともに、上桁垂壁部２３及び下桁垂壁部３３を建物躯体１０に固定されている踏板材支持部１１に水平方向に移動可能に接合する（階段部固定ステップＳ４）。 Next, the carried-in upper-floor staircase 2 is fixed to the upper-floor floor 10a, and the lower-floor staircase 3 is fixed to the lower-floor floor 10b, respectively. Is connected to the tread supporting member 11 fixed to the building frame 10 so as to be movable in the horizontal direction (step fixing step S4).
次に、制振ユニット５の第１端部接合片５０ｂ及び第１中央接合片５０ｃを上桁垂壁部２３に固定し、第２端部接合片５１ｂ及び第２中央接合片５１ｃを下桁垂壁部３３に固定して（制振ユニット固定ステップＳ５）、鉄骨階段１が完成する。 Next, the first end joining piece 50b and the first central joining piece 50c of the vibration damping unit 5 are fixed to the upper spar vertical wall portion 23, and the second end joining piece 51b and the second central joining piece 51c are attached to the lower spar. The steel staircase 1 is completed by fixing to the vertical wall portion 33 (damping unit fixing step S5).
第１実施形態の鉄骨階段１の施工方法によれば、上階床１０ａ及び下階床１０ｂを備える建物躯体１０と、上階床階段部２及び下階床階段部３と、第１接合部材５０と第２接合部材５１との間に粘弾性体５２が設けられている制振ユニット５と、は別々のステップにて各々製造されるので、各々専門の作業者等により精度良く製造することが可能である。また、建物躯体１０のある施工現場に上階床階段部２及び下階床階段部３と、制振ユニット５と、を搬入し、上階床１０ａに上階床階段部２を固定するとともに上階床階段部２に第１接合部材５０を固定し、下階床１０ｂに下階床階段部３を固定するとともに下階床階段部３に第２接合部材５１を固定することにより、高い制振性能を備えた鉄骨階段１を建物躯体に設けることが可能である。 According to the construction method of the steel frame staircase 1 of the first embodiment, the building frame 10 including the upper floor 10a and the lower floor 10b, the upper floor stair 2 and the lower floor stair 3, and the first joining member Since the vibration damping unit 5 in which the viscoelastic body 52 is provided between the 50 and the second joint member 51 is manufactured in separate steps, it is necessary to manufacture the vibration damping unit 5 with high precision by a specialized worker or the like. Is possible. In addition, the upper floor staircase 2 and the lower floor staircase 3 and the vibration damping unit 5 are carried into the construction site where the building frame 10 is located, and the upper floor staircase 2 is fixed to the upper floor 10a. The first joint member 50 is fixed to the upper floor staircase 2, the lower floor staircase 3 is fixed to the lower floor 10 b, and the second joint member 51 is fixed to the lower floor staircase 3. It is possible to provide a steel frame staircase 1 having vibration damping performance in a building frame.
上記第１実施形態においては、上階床階段部２と下階床階段部３とが踊り場４にて接続されて折り返す構造の鉄骨階段１を例に挙げて説明したが、これに限らず、図７に示すような、踊り場を備えない直線上に延びる鉄骨階段１００であっても構わない。 In the above-described first embodiment, the steel staircase 1 having a structure in which the upper-floor staircase 2 and the lower-floor staircase 3 are connected at the landing 4 and turned back is described as an example, but is not limited thereto. As shown in FIG. 7, a steel staircase 100 extending on a straight line without a landing may be used.
具体的には、上下方向に隣り合う２つの階床１０ａ、１０ｂ間に設けられている直線階段部１１０と、下階床１０ｂを構成する梁１０１との間に制振部材としての粘弾性体５２を備えた制振ユニット６が設けられている。基本的な構造は、第１実施形態の上階床階段部２と制振ユニット５を備えた踊り場４と同様である。 Specifically, a viscoelastic body as a vibration damping member is provided between a linear staircase 110 provided between two vertically adjacent floors 10a and 10b and a beam 101 constituting the lower floor 10b. The vibration damping unit 6 including the control unit 52 is provided. The basic structure is the same as the landing 4 including the upper floor staircase 2 and the vibration damping unit 5 in the first embodiment.
第２実施形態における鉄骨階段１００は、上階床１０ａと下階床１０ｂとのうちの一方である上階床１０ａに固定された一方階段部としての直線階段部１１０と、上階床１０ａと下階床１０ｂとのうちの他方である下階床１０ｂを構成する梁１０１とを接続する制振ユニット６と、を備えている。すなわち、第２実施形態の鉄骨階段１００は、制振ユニット６が設けられる位置が、第１実施形態のように踊り場４の上踊場踏板材２２及び下踊場踏板材３２の下方ではなく、直線階段部１１０が備える一方踏板材としての階段踏板材１１３の下方である。 The steel frame staircase 100 in the second embodiment includes a straight staircase 110 as one staircase fixed to the upper floor 10a which is one of the upper floor 10a and the lower floor 10b, and an upper floor 10a. And a vibration damping unit 6 for connecting the lower floor 10b to the beam 101 constituting the lower floor 10b which is the other of the lower floor 10b. That is, in the steel frame staircase 100 of the second embodiment, the position where the vibration damping unit 6 is provided is not a position below the upper landing tread material 22 and the lower landing tread material 32 of the landing 4 as in the first embodiment, but a straight staircase. The lower part of the step 110 is a stepped tread 113 as a one-step tread.
第２実施形態の直線階段部１１０は、複数の段板でなる踏み面を有する階段本体１１１と、階段本体１１１の幅方向における両端に設けられている桁１１２と、階段本体１１１が有する最下段の蹴上の下端と繋がった下階床１０ｂの階段踏板材１１３と、を有している。桁１１２は、階段本体１１１の側部から下階床１０ｂ側の階段踏板材１１３の側部まで繋がっており、階段踏板材１１３の側部では下方に延出された桁垂壁部１１４を有している。 The straight staircase portion 110 of the second embodiment includes a staircase body 111 having a tread surface composed of a plurality of step boards, girders 112 provided at both ends in the width direction of the staircase body 111, and a lowermost step included in the staircase body 111. And the stair tread 113 of the lower floor 10b connected to the lower end of the riser. The girder 112 is connected from the side of the staircase body 111 to the side of the stair tread 113 on the lower floor 10b side, and has a girder wall 114 extending downward at the side of the stair tread 113. are doing.
桁垂壁部１１４は、下階床１０ｂを構成する梁１０１の上面に、上方に突出させて設けられている踏板材支持部１１と、第１実施形態と同様に、ボルト・ナットにより水平方向に相対移動可能に接合されている。 The girder hanging wall portion 114 is provided on the upper surface of the beam 101 constituting the lower floor 10b so as to protrude upward from the tread plate supporting portion 11 and, similarly to the first embodiment, is bolted and nut-mounted in the horizontal direction. Are movably joined to each other.
制振ユニット６は、図８、図９に示すように、桁垂壁部１１４と繋がる第１接合部材１１５と、下階床１０ｂの梁１０１と繋がる第２接合部材１１６と、第１接合部材１１５と第２接合部材１１６との間に介在される粘弾性体５２と、を有している。 As shown in FIGS. 8 and 9, the vibration damping unit 6 includes a first joining member 115 connected to the girder hanging wall 114, a second joining member 116 connected to the beam 101 of the lower floor 10 b, and a first joining member. And a viscoelastic body 52 interposed between the second bonding member 116 and the second bonding member 116.
第１接合部材１１５は、桁１１２の幅にて直線階段部１１０から繋がる階段踏板材１１３のほぼ全領域の広さを備える平板状をなす２枚の第１制振部材支持部１１５ａと、第１制振部材支持部１１５ａの幅方向における両端に設けられ上方に延出され桁垂壁部１１４と接合される第１接合片１１５ｂと、を有している。２枚の第１制振部材支持部１１５ａは、上下方向に間隔を隔てて対面しており、四隅近傍に設けられた第１端部接合片１１５ｂにより上下方向の間隔が保たれている。 The first joining member 115 has two flat first damping member supporting portions 115a having a width of substantially the entire area of the stair treading member 113 connected to the straight stair portion 110 with the width of the spar 112, And a first joining piece 115b that is provided at both ends in the width direction of the first damping member supporting portion 115a, extends upward, and is joined to the girder hanging wall portion 114. The two first vibration-damping member supporting portions 115a face each other at an interval in the up-down direction, and the interval in the up-down direction is maintained by first end joining pieces 115b provided near four corners.
第２接合部材１１６は、第１制振部材支持部１１５ａのほぼ全領域の広さを備える平板状の第２制振部材支持部１１６ａと、第２制振部材支持部１１６ａの幅方向における両端部に設けられ下方に延出され下階床１０ｂの梁１０１と接合される第２接合片１１６ｂと、を有している。図９において、上側の第１制振部材支持部１１５ａに設けられている第１接合片１１５ｂと、下側の第１制振部材支持部１１５ａに設けられている第１接合片１１５ｂとは、単一の部材である。 The second joining member 116 has a flat plate-shaped second vibration-damping member supporting portion 116a having substantially the entire area of the first vibration-damping member supporting portion 115a, and both ends in the width direction of the second vibration-damping member supporting portion 116a. And a second joining piece 116b extending downward and joined to the beam 101 of the lower floor 10b. In FIG. 9, the first joint piece 115b provided on the upper first vibration damping member support 115a and the first joint piece 115b provided on the lower first vibration damper support 115a are: It is a single member.
第２制振部材支持部１１６ａは、２枚の第１制振部材支持部１１５ａ間に挿入されている。このとき、下側の第１制振部材支持部１１５ａには、第２制振部材支持部１１６ａから垂設された第２接合片１１６ｂが挿通されるスリット１１５ｃが設けられている。ここで、第１制振部材支持部１１５ａが外板に相当し、第２制振部材支持部１１６ａが中板に相当する。 The second damping member supporting portion 116a is inserted between the two first damping member supporting portions 115a. At this time, the lower first vibration damping member supporting portion 115a is provided with a slit 115c through which the second joining piece 116b suspended from the second vibration damping member supporting portion 116a is inserted. Here, the first damping member supporting portion 115a corresponds to an outer plate, and the second damping member supporting portion 116a corresponds to a middle plate.
第２制振部材支持部１１６ａが２枚の第１制振部材支持部１１５ａ間に挿入されている状態では、２枚の第１制振部材支持部１１５ａと第２制振部材支持部１１６ａとがほぼ全領域で対面している。２枚の第１制振部材支持部１１５ａ間に挿入された第２制振部材支持部１１６ａの上面と、上側の第１制振部材支持部１１５ａとは、板状の粘弾性体５２を介して接合されており、第２制振部材支持部１１６ａの下面と、下側の第１制振部材支持部１１５ａとは、板状の粘弾性体５２を介して接合されている。 When the second vibration damping member support 116a is inserted between the two first vibration damping member supports 115a, the two first vibration damping member supports 115a, the second vibration damping member support 116a, Are facing in almost all areas. The upper surface of the second vibration damping member support portion 116a inserted between the two first vibration damping member support portions 115a and the upper first vibration damping member support portion 115a are interposed via a plate-shaped viscoelastic body 52. The lower surface of the second vibration damping member support portion 116a and the lower first vibration damping member support portion 115a are joined via a plate-shaped viscoelastic body 52.
制振ユニット６は、図７、図８に示すように、幅方向において梁１０１上に設けられている踏板材支持部１１の間に配置されている。内側に階段本体１１１が設けられている一対の桁垂壁部１１４は、外側に当接された踏板材支持部１１と水平方向に相対移動可能に接合されており、内側に制振ユニット６の第１接合片１１５ｂと固定されている。第２接合部材１１６の第２接合片１１６ｂは、梁１０１に固定されている。 As shown in FIGS. 7 and 8, the vibration damping unit 6 is arranged between the tread support members 11 provided on the beam 101 in the width direction. A pair of girder vertical wall portions 114 provided with the stair body 111 on the inside are joined to the tread plate support portion 11 abutted on the outside so as to be relatively movable in the horizontal direction. It is fixed to the first joining piece 115b. The second joining piece 116b of the second joining member 116 is fixed to the beam 101.
鉄骨階段１００は、鉄骨階段１００が備えられている階床間に、風や地震等により層間変位が生じると、上階床１０ａと繋がった直線階段部１１０の階段踏板材１１３、桁垂壁部１１４、第１接合片１５ｂを介して繋がった第１制振部材支持部１１５ａと、下階床１０ｂの梁１０１と第２接合片１６ｂにより繋がった第２制振部材支持部１１６ａと、が相対変位することにより、第１制振部材支持部１１５ａと第２制振部材支持部１１６ａの間に設けられている粘弾性体５２により振動エネルギーが吸収される。 When an interlayer displacement occurs between the floors on which the steel stairs 100 are provided due to a wind, an earthquake, or the like, the steel stairs 100 include a stair tread plate member 113 of a straight stair portion 110 connected to the upper floor 10a, and a girder wall portion. 114, the first damping member supporting portion 115a connected via the first joining piece 15b, and the second damping member supporting portion 116a connected with the beam 101 of the lower floor 10b and the second joining piece 16b are relatively opposed to each other. Due to the displacement, the vibration energy is absorbed by the viscoelastic body 52 provided between the first damping member supporting portion 115a and the second damping member supporting portion 116a.
第２実施形態の鉄骨階段１００によれば、上階床１０ａに固定された直線階段部１１０と、下階床１０ｂとが制振ユニット６により接続されているので、上階床１０ａと下階床１０ｂとに生じる相対変位を制振ユニット６により吸収させて制振することが可能である。また、制振ユニット６は下階床１０ｂに配置されているので、建物の構面に備える必要がなく、平面計画に対する制約が発生しない。このため、平面計画の自由度を確保しつつもより高い制振性能を備えることが可能である。 According to the steel frame staircase 100 of the second embodiment, since the linear staircase 110 fixed to the upper floor 10a and the lower floor 10b are connected by the vibration damping unit 6, the upper floor 10a and the lower floor are connected. The relative displacement generated with respect to the floor 10b can be absorbed by the vibration damping unit 6 and damped. Further, since the vibration damping unit 6 is disposed on the lower floor 10b, it is not necessary to provide the vibration control unit 6 on the building surface, and there is no restriction on the floor plan. For this reason, it is possible to provide higher vibration suppression performance while securing the degree of freedom of the plan.
また、制振ユニット６は、直線階段部１１０に固定される第１接合部材１１５と、下階床１０ｂを構成する梁１０１に固定される第２接合部材１１６との間に粘弾性体５２が設けられている構成なので、直線階段部１１０に第１接合部材１１５を固定し、下階床１０ｂを構成する梁１０１に第２接合部材１１６を固定することにより、下階床１０ｂに容易に備えることが可能である。 Further, in the vibration damping unit 6, the viscoelastic body 52 is provided between the first joint member 115 fixed to the straight staircase 110 and the second joint member 116 fixed to the beam 101 constituting the lower floor 10b. Since it is provided, the first joining member 115 is fixed to the straight staircase 110, and the second joining member 116 is fixed to the beam 101 constituting the lower floor 10b, so that the lower floor 10b can be easily provided. It is possible.
第２実施形態の鉄骨階段１００の施工方法は、図６に示す第一実施形態の施工方法と同様に、まず、直線階段部１１０を工場等により製造し（階段部製造ステップＳ１）、第１接合部材１１５と第２接合部材１１６との間に粘弾性体５２を備えた制振ユニット６を工場等により製造する（制振ユニット製造ステップＳ２）。 The construction method of the steel frame staircase 100 of the second embodiment is similar to the construction method of the first embodiment shown in FIG. 6, in which a straight staircase 110 is first manufactured by a factory or the like (staircase manufacturing step S1), and the first step is performed. The damping unit 6 including the viscoelastic body 52 between the joining member 115 and the second joining member 116 is manufactured at a factory or the like (damping unit manufacturing step S2).
次に、直線階段部１１０、及び、制振ユニット６を、上階床１０ａ及び下階床１０ｂを備える建物躯体１０を施工した（躯体施工ステップＳ３）施工現場に搬入する。 Next, the straight staircase 110 and the vibration damping unit 6 are carried into the construction site where the building frame 10 including the upper floor 10a and the lower floor 10b has been constructed (frame construction step S3).
次に、搬入された直線階段部１１０を上階床１０ａに固定するとともに、桁垂壁部１１４を、建物躯体１０をなす梁１０１に固定されている踏板材支持部１１に水平方向に移動可能に接合する（階段部固定ステップＳ４）。 Next, the carried straight staircase 110 can be fixed to the upper floor 10a, and the girder hanging wall 114 can be moved in the horizontal direction to the tread supporting member 11 fixed to the beam 101 forming the building frame 10. (Stair portion fixing step S4).
次に、制振ユニット６の第１接合片１１５ｂを桁垂壁部１１４に固定し、第２接合片１１６ｂを梁１０１に固定して（制振ユニット固定ステップＳ５）、鉄骨階段１００が完成する。 Next, the first joint piece 115b of the vibration damping unit 6 is fixed to the girder hanging wall 114, and the second joint piece 116b is fixed to the beam 101 (damping unit fixing step S5), and the steel frame staircase 100 is completed. .
このような鉄骨階段１００の施工方法によれば、上階床１０ａ及び下階床１０ｂを備える建物躯体１０と、直線階段部１１０と、制振ユニット６と、は別々のステップにて各々製造されるので、各々専門の業者等により精度良く製造することが可能である。また、建物躯体１０のある施工現場に直線階段部１１０と、制振ユニット６と、を搬入し、上階床１０ａに階段部を固定するとともに直線階段部１１０に第１接合部材１１５を固定し、下階床１０ｂに第２接合部材１１６を固定することにより、高い制振性能を備えた鉄骨階段１００を建物躯体１０に設けることが可能である。 According to such a construction method of the steel frame stairs 100, the building frame 10 including the upper floor 10a and the lower floor 10b, the straight stair 110, and the vibration damping unit 6 are manufactured in separate steps. Therefore, each can be manufactured with high precision by a specialized trader or the like. Further, the straight staircase 110 and the vibration damping unit 6 are carried into the construction site where the building frame 10 is located, and the staircase is fixed to the upper floor 10a and the first joining member 115 is fixed to the straight staircase 110. By fixing the second joining member 116 to the lower floor 10b, it is possible to provide the steel frame staircase 100 having high vibration damping performance in the building frame 10.
第２実施形態の鉄骨階段１００は、上階床１０ａに固定された階段部１１０と下階床１０ｂとの間に制振ユニット６が設けられている例について説明したが、これに限らず、下階床に固定された階段部と上階床との間に粘弾性体が設けられていても構わない。 Although the steel frame staircase 100 of the second embodiment has been described with respect to an example in which the vibration damping unit 6 is provided between the staircase 110 fixed to the upper floor 10a and the lower floor 10b, the invention is not limited thereto. A viscoelastic body may be provided between the stairs fixed to the lower floor and the upper floor.
上記実施形態においては、第１接合部材５０、１１５が有する第１制振部材支持部５０ａ、１１５ａ及び第２接合部材５１、１１６が有する第２制振部材支持部５０ａ、１１６ａのいずれか一方が２枚設けられており、他方が間に介在されている例について説明したが、これに限らず、第１制振部材支持部及び第２制振部材支持部が各々１枚ずつであっても、また、その他の構成であっても、対面する第１制振部材支持部と第２制振部材支持部との間に制振部材が設けられていれば構わない。 In the above-described embodiment, one of the first vibration damping member supporting portions 50a and 115a of the first joining members 50 and 115 and the second vibration damping member supporting portions 50a and 116a of the second joining members 51 and 116 are provided. Although the example in which two sheets are provided and the other is interposed has been described, the present invention is not limited to this, and the first vibration damping member support portion and the second vibration damping member support portion may be one each. Also, other configurations may be used as long as a vibration damping member is provided between the facing first and second vibration damping member support portions.
また、上記実施形態においては、制振部材として粘弾性体５２を用いる例について説明したが、これに限るものではない。例えば、第１制振部材支持部と第２制振部材支持部との間に摩擦板と滑り板とを備えた摩擦ダンパーが設けられている構成であっても構わない。 Further, in the above embodiment, the example in which the viscoelastic body 52 is used as the vibration damping member has been described, but the present invention is not limited to this. For example, a configuration in which a friction damper having a friction plate and a sliding plate is provided between the first vibration damping member support and the second vibration damping member support may be employed.
以上、上記実施形態は、本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。本発明は、その趣旨を逸脱することなく、変更、改良され得ると共に、本発明にはその等価物が含まれることはいうまでもない。 As described above, the above embodiments are for facilitating the understanding of the present invention, and are not intended to limit and interpret the present invention. The present invention can be changed and improved without departing from the spirit thereof, and it goes without saying that the present invention includes equivalents thereof.
１ 鉄骨階段、２ 上階床階段部（一方階段部）、３ 下階床階段部(他方階段部)、
４ 踊り場、５ 制振ユニット、 ６ 制振ユニット、１０ａ 上階床(一方)、
１０ｂ 下階床（他方）、２２ 上踊場踏板材(一方踏板材)、３２ 下踊場踏板材、
５０ 第１接合部材、５０ａ 第１制振部材支持部材（中板）、５１ 第２接合部材、
５１ａ 第２制振部材支持部材(外板)、５２ 粘弾性体（制振部材）、
１００ 鉄骨階段、１１０ 直線階段部（一方階段部）、
１１３ 階段踏板材(一方踏板部)、１１５ 第１接合部材、
１１５ａ 第１制振部材支持部材（外板）、１１６ 第２接合部材、
１１６ａ 第２制振部材支持部材（中板）、
1 steel stairs, 2 upper floor stairs (one staircase), 3 lower floor stairs (other staircase),
4 landing, 5 damping unit, 6 damping unit, 10a upper floor (one side),
10b lower floor (other), 22 upper landing treads (one tread), 32 lower landing treads,
50 first joining member, 50a first damping member supporting member (middle plate), 51 second joining member,
51a second damping member supporting member (outer plate), 52 viscoelastic body (damping member),
100 steel stairs, 110 straight stairs (one staircase),
113 stair tread material (one tread portion), 115 first joining member,
115a first damping member supporting member (outer plate), 116 second joining member,
116a second damping member supporting member (middle plate);
Claims (6)
前記上階床と前記下階床とのうちの一方に固定された一方階段部、及び、
前記一方階段部と、前記上階床と前記下階床とのうちの他方と、を接続する制振ユニット、
を備え、
前記制振ユニットは、
前記一方階段部に固定された第１接合部材と、
前記他方に固定された第２接合部材と、
前記第１接合部材と前記第２接合部材との間に設けられた制振部材と、
を備えていることを特徴とする鉄骨階段。 It is a steel staircase provided between the upper floor and the lower floor,
One staircase portion fixed to one of the upper floor and the lower floor, and
A damping unit that connects the one staircase and the other of the upper floor and the lower floor,
With
The vibration damping unit includes:
A first joining member fixed to the one step portion;
A second joining member fixed to the other,
A vibration damping member provided between the first joining member and the second joining member,
A steel staircase comprising:
前記第２接合部材は、前記一方階段部と異なる他方階段部を介して前記他方に固定されており、
前記制振ユニットは、前記一方階段部と、前記他方階段部との間に位置する踊り場に設けられていることを特徴とする鉄骨階段。 The steel staircase according to claim 1,
The second joining member is fixed to the other through a step other than the one step,
The steel frame staircase, wherein the damping unit is provided on a landing located between the one staircase portion and the other staircase portion.
前記第１接合部材は、前記一方階段部が備える一方踏板材の下方に配置される第１制振部材支持部を備え、
前記第２接合部材は、前記一方踏板材の下方に配置され、前記第１制振部材支持部と対面する第２制振部材支持部を備え、
前記第１制振部材支持部と前記第２制振部材支持部との間に前記制振部材が設けられていることを特徴とする鉄骨階段。 It is a steel staircase according to claim 1 or claim 2,
The first joining member includes a first damping member supporting portion disposed below one tread plate member provided in the one step portion,
The second joining member includes a second vibration damping member supporting portion that is disposed below the one tread plate member and faces the first vibration damping member supporting portion,
A steel frame staircase wherein the damping member is provided between the first damping member support and the second damping member support.
前記第１制振部材支持部と前記第２制振部材支持部とのうちの一方は、間隔を隔てて対面する一対の外板をなし、
前記第１制振部材支持部と前記第２制振部材支持部とのうちの他方は、前記一対の外板の間に介在される中板をなし、
前記一対の外板の各々と前記中板との間に前記制振部材が設けられていることを特徴とする鉄骨階段。 The steel staircase according to claim 3,
One of the first vibration damping member support portion and the second vibration damping member support portion forms a pair of outer plates facing each other at an interval,
The other of the first vibration damping member support and the second vibration damping member support forms a middle plate interposed between the pair of outer plates,
A steel frame staircase wherein the vibration damping member is provided between each of the pair of outer plates and the middle plate.
前記上階床及び前記下階床を施工する躯体施工ステップと、
前記一方階段部を製造する階段部製造ステップと、
前記第１接合部材と前記第２接合部材との間に前記制振部材を介在させて前記制振ユニットを製造する制振ユニット製造ステップと、
前記上階床と前記下階床とのうちの一方に前記一方階段部を固定する階段部固定ステップと、
前記一方階段部に前記第１接合部材を固定し、前記上階床と前記下階床とのうちの前記他方に前記第２接合部材を固定する制振ユニット固定ステップと、
を有することを特徴とする鉄骨階段の施工方法。 It is a construction method of the steel frame stairs according to claim 1,
A skeleton construction step of constructing the upper floor and the lower floor,
A step manufacturing step of manufacturing the one step,
A vibration damping unit manufacturing step of manufacturing the vibration damping unit by interposing the vibration damping member between the first joint member and the second joint member;
A staircase fixing step of fixing the one staircase to one of the upper floor and the lower floor,
A vibration damping unit fixing step of fixing the first joining member to the one stair portion, and fixing the second joining member to the other of the upper floor and the lower floor,
A method for constructing a steel staircase, comprising:
前記上階床及び前記下階床を施工する躯体施工ステップと、
前記一方階段部及び前記他方階段部を製造する階段部製造ステップと、
前記第１接合部材と前記第２接合部材との間に前記制振部材を介在させて前記制振ユニットを製造する制振ユニット製造ステップと、
前記上階床と前記下階床とのうちの一方に前記一方階段部を固定し、前記上階床と前記下階床とのうちの他方に前記他方階段部を固定する階段部固定ステップと、
前記一方階段部に前記第１接合部材を固定し、前記他方階段部に前記第２接合部材を固定する制振ユニット固定ステップと、
を有することを特徴とする鉄骨階段の施工方法。
It is a construction method of the steel frame stairs according to claim 2,
A skeleton construction step of constructing the upper floor and the lower floor,
A staircase manufacturing step of manufacturing the one staircase and the other staircase,
A vibration damping unit manufacturing step of manufacturing the vibration damping unit by interposing the vibration damping member between the first joint member and the second joint member;
A staircase fixing step of fixing the one staircase to one of the upper floor and the lower floor, and fixing the other staircase to the other of the upper floor and the lower floor; ,
A vibration damping unit fixing step of fixing the first joining member to the one stair portion and fixing the second joining member to the other stair portion;
A method for constructing a steel staircase, comprising:
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