JP2856035B2 - Laminated rubber bearings for lightweight structures, etc. - Google Patents
Laminated rubber bearings for lightweight structures, etc.Info
- Publication number
- JP2856035B2 JP2856035B2 JP5183857A JP18385793A JP2856035B2 JP 2856035 B2 JP2856035 B2 JP 2856035B2 JP 5183857 A JP5183857 A JP 5183857A JP 18385793 A JP18385793 A JP 18385793A JP 2856035 B2 JP2856035 B2 JP 2856035B2
- Authority
- JP
- Japan
- Prior art keywords
- laminated
- rubber
- steel plate
- bearing
- rubber bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、木造構造物や住宅あ
るいは精密機械等の軽量構造物の免震支持部材として使
用され、または高層建物等の振動制御用動吸振器もしく
はこれをアクティブに制御する装置の支持部材に使用さ
れる積層ゴム支承に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used as a seismic isolation support member for a light weight structure such as a wooden structure, a house, or a precision machine, or a dynamic vibration absorber for vibration control of a high-rise building or the like, or actively controlling the vibration absorber. The present invention relates to a laminated rubber bearing used for a support member of a device for performing the above.
【０００２】[0002]
【従来の技術】構造物の免震に使用される積層ゴム支承
は、図５に示すように、比較的薄いゴム層Ｒと鋼製の板
Ｐとを交互に積層して一体化した構造であり、従来にお
いては鋼板Ｐは積層ゴム支承本体の横断面全体を占める
大きさとされている。鉛直荷重に対しては硬く、支持構
造物を安定して支承でき、また水平方向には柔らかく、
支持構造物の固有周期を長周期とした支持が可能であ
る。2. Description of the Related Art A laminated rubber bearing used for seismic isolation of a structure has a structure in which a relatively thin rubber layer R and a steel plate P are alternately laminated and integrated as shown in FIG. Conventionally, the steel sheet P is sized to occupy the entire cross section of the laminated rubber bearing main body. It is hard against vertical loads, can stably support the supporting structure, and is soft in the horizontal direction,
It is possible to support the support structure with a long natural period.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前述の
ような従来の積層ゴム支承は、重量構造物の免震構造と
して使用されるため、比較的大きな鉛直支持能力があ
り、大きな水平方向せん断力に対向できるように設計さ
れていることから、小さな鉛直荷重（すなわち水平方向
せん断力）に対しては水平方向の剛性も高いのが普通で
ある。However, since the conventional laminated rubber bearing as described above is used as a seismic isolation structure for a heavy structure, it has a relatively large vertical support capacity and a large horizontal shear force. Because they are designed to be able to face each other, they generally have high horizontal rigidity for small vertical loads (ie, horizontal shear forces).
【０００４】従って、木造構造物のような軽量構造物の
場合、振動系を形成する質量が小さいため、従来の積層
ゴム支承では固有周期が短くなるため免震構造を構成す
ることが困難となる。また、高層建物の振動制御の目的
のために用いられる動吸振器やこれをアクティブに制御
する装置を支持する場合にも、従来の積層ゴム支承で
は、長周期（例えば2.0 〜5.0 秒) の系を構成すること
が困難となる。Accordingly, in the case of a lightweight structure such as a wooden structure, the mass forming the vibration system is small, and the natural period of the conventional laminated rubber bearing is short, so that it is difficult to form a seismic isolation structure. . Also, when supporting a dynamic vibration absorber used for the purpose of vibration control of a high-rise building or a device that actively controls the vibration absorber, the conventional laminated rubber bearing has a long cycle (for example, 2.0 to 5.0 seconds). Is difficult to configure.
【０００５】この発明は、前述のような事情に鑑みてな
されたもので、その目的は、軽量の鉛直荷重でも長周期
の固有周期を持つ系を構成することのできる積層ゴム支
承を提供することにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a laminated rubber bearing capable of forming a system having a long natural period even with a light vertical load. It is in.
【０００６】[0006]
【課題を解決するための手段】この発明は、ゴム層と鋼
板とを交互に積層して一体構造とした積層鋼板を有する
積層ゴム支承において、軽量の鉛直荷重で長周期の系を
構成すべく、積層鋼板をゴム体に部分的に配設し、一部
が積層鋼板で残りがゴム体のみで構成されるようにす
る。即ち、請求項１に係る積層ゴム支承は、上下フラン
ジ間に、ゴム層と鋼板とを交互に積層して一体構造とし
た積層鋼板と、ゴム体とを一体的に配設して構成され、
前記積層鋼板は、平面視で積層ゴム支承本体の中心部に
位置し（図１参照）、あるいは積層ゴム支承本体の中心
軸線の回りに等間隔をおいて位置するように（図２(i)
、図２(iii) 参照）、前記ゴム体内に埋設されている
ことを特徴とする。 また、請求項２に係る積層ゴム支承
は、上下フランジ間に、ゴム層と鋼板とを交互に積層し
て一体構造とした積層鋼板と、ゴム体とを一体的に配設
して構成され、前記積層鋼板は、前記ゴム体が平面視で
積層ゴム支承本体の中心部に位置し（積層鋼板の平面形
状がリング状の場合、図示省略）、あるいは積層ゴム支
承本体の中心軸線の回りに等間隔をおいて位置する（図
２(ii)参照）ような平面形状であることを特徴とする。 SUMMARY OF THE INVENTION The present invention relates to a laminated rubber bearing having a laminated steel plate having an integrated structure by alternately laminating a rubber layer and a steel plate. In this case, the laminated steel sheet is partially disposed on the rubber body, and a part thereof is constituted by the laminated steel sheet and the rest is constituted only by the rubber body. That is, the laminated rubber bearing according to claim 1 is a
Rubber layers and steel plates are alternately laminated between the
Laminated steel sheet and a rubber body are integrally arranged,
The laminated steel sheet is located at the center of the laminated rubber bearing body in plan view.
Located (see Fig. 1) or the center of the laminated rubber bearing body
Be positioned at equal intervals around the axis (Fig. 2 (i)
, See FIG. 2 (iii)), embedded in the rubber body.
It is characterized by the following. A laminated rubber bearing according to claim 2
Alternately laminates rubber layers and steel plates between the upper and lower flanges.
And integrated laminated steel plate and rubber body
In the laminated steel sheet, the rubber body is in a plan view.
Located in the center of the laminated rubber bearing body
If the shape is a ring shape, omit the illustration) or a laminated rubber support
Are equally spaced around the center axis of the bearing body (Fig.
2 (ii)).
【０００７】[0007]
【作用】以上のような構成において、横断面全体にわた
って積層鋼板が配設される従来の積層ゴム支承に比べて
積層鋼板のないゴム部分が増加し、このゴム部分におい
ては鉛直軸力に伴う曲げ戻し応力が働き、この応力によ
るせん断力が付加的に加わることにより、見掛けのせん
断剛性が低下する。これにより、鉛直荷重（水平方向せ
ん断力）が小さい軽量構造物であっても水平方向に変形
し易くなり、長周期の系を構成することができる。In the above construction, the number of rubber parts without laminated steel sheets increases as compared with the conventional laminated rubber bearing in which laminated steel sheets are disposed over the entire cross section, and the bending caused by the vertical axial force in the rubber parts. A return stress acts, and an additional shear force due to this stress reduces the apparent shear rigidity. Accordingly, even a lightweight structure having a small vertical load (horizontal shear force) is easily deformed in the horizontal direction, and a long-period system can be configured.
【０００８】[0008]
【実施例】以下、この発明を図示する一実施例に基づい
て説明する。図１は本発明の第１実施例であり、この発
明の積層ゴム支承１は、上下のフランジ４，５間に設け
られるゴム体２の中心部にのみ、円形の鋼板Ｐ1 からな
る積層鋼板３−１を配設し、積層鋼板が本体横断面の一
部分のみに配設されるようにする。。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. FIG. 1 shows a first embodiment of the present invention. A laminated rubber bearing 1 according to the present invention comprises a laminated steel plate composed of a circular steel plate P 1 only at the center of a rubber body 2 provided between upper and lower flanges 4 and 5. 3-1 is provided so that the laminated steel sheet is provided only in a part of the main body cross section. .
【０００９】また、図２に示すのは、種々の変形例であ
り、図２(i) は円形の鋼板Ｐ2 からなる積層鋼板３−２
を平面視で中心軸線の回りに等間隔をおいて４つ配設し
た例である。図２(ii)は平面形状が丸十字の鋼板Ｐ3 か
らなる積層鋼板３−３を使用した例である。図２(iii)
はゴム体２の中央部に中空部６を形成し、平面形状が円
弧状の鋼板Ｐ4 からなる積層鋼板３−４をゴム体２に等
間隔をおいて４つ配設した例である。[0009] Figure 2 shows a variety of modification, FIG. 2 (i) is laminated steel 3-2 comprising a circular steel plate P 2
Are arranged at equal intervals around a central axis in plan view. Figure 2 (ii) is an example of using the laminated steel 3-3 planar shape made of steel plate P 3 round cross. Fig. 2 (iii)
Is an example in which a hollow portion 6 is formed in the center of the rubber body 2 and four laminated steel plates 3-4 each formed of an arc-shaped steel plate P4 are arranged at equal intervals on the rubber body 2.
【００１０】なお、以上の実施例において積層鋼板３
は、鉛直荷重が等しくかかるように配置することはいう
までもない。In the above embodiment, the laminated steel sheet 3
Needless to say, they are arranged so that a vertical load is equally applied.
【００１１】以上のような構成において、従来の積層ゴ
ム支承と比較して横断面におけるゴム体１の占める割合
が増加することにより、水平方向に変形し易くなる。ま
ず、極端な例としてゴム単体のみによる支承の力学モデ
ルを図３に示す。[0011] In the above-described configuration, the ratio of the rubber body 1 in the cross section increases as compared with the conventional laminated rubber bearing, so that the rubber body 1 is easily deformed in the horizontal direction. First, as an extreme example, FIG. 3 shows a dynamic model of a bearing using only rubber alone.
【００１２】図３において、鉛直軸力Ｎが増大すると、
これに比例して水平剛性が低下する。これは、式（１）
〜（２）に示すように、鉛直軸力に伴う曲げ戻し応力Δ
Ｍが働き、せん断力ΔＱが付加的に加わることにより、
見掛けのせん断剛性が低下するためである。もしも荷重
重心と断面重心との偏心距離が増大すると、曲げ戻し量
も多くなり、水平剛性も大きく低下することになる。
（５）式に示すように、見掛けの水平剛性Ｋeff は、元
の水平剛性Ｋ0 から曲げ戻しに伴うせん断力による水平
剛性を差し引いた値となる。In FIG. 3, when the vertical axial force N increases,
The horizontal rigidity decreases in proportion to this. This is given by equation (1)
To (2), the bending return stress Δ due to the vertical axial force
M works, and shear force ΔQ is additionally applied,
This is because the apparent shear rigidity decreases. If the eccentric distance between the load center of gravity and the sectional center of gravity increases, the amount of bending back increases, and the horizontal rigidity greatly decreases.
As shown in the equation (5), the apparent horizontal rigidity K eff is a value obtained by subtracting the horizontal rigidity due to the shearing force accompanying the bending back from the original horizontal rigidity K 0 .
【００１３】[0013]
【数１】 (Equation 1)
【００１４】曲げ戻し量は、ゴム体２と積層鋼板３の占
める割合を変えることにより任意に調整することがで
き、適度な水平剛性の支承を実現することができる。な
お、鉛直方向に関しては、鉛直荷重が小さいため、部分
的な積層鋼板３で適度な鉛直方向の剛性が得られる。The amount of unbending can be arbitrarily adjusted by changing the ratio of the rubber body 2 and the laminated steel sheet 3, and a bearing having appropriate horizontal rigidity can be realized. In the vertical direction, since the vertical load is small, an appropriate vertical rigidity can be obtained with the partially laminated steel plate 3.
【００１５】図４に示すのは、このような積層ゴム支承
１を高層建物１０と木造構造物１１に適用した例であ
る。高層建物１０では動吸振器１２の支持体として用い
ることにより長周期の系を構成することができる。軽量
の木造構造物１１では、長周期の免震支承を作ることが
可能となった。FIG. 4 shows an example in which such a laminated rubber bearing 1 is applied to a high-rise building 10 and a wooden structure 11. In the high-rise building 10, a long-period system can be configured by using it as a support for the dynamic vibration absorber 12. With the lightweight wooden structure 11, a long-period seismic isolation bearing can be made.
【００１６】[0016]
【発明の効果】前述の通り、この発明の積層ゴム支承
は、積層鋼板をゴム体からなる本体に部分的に配設する
ようにしたため、従来の積層鋼板が全体にわたって配設
される積層ゴム支承と比較して水平方向の剛性を低下さ
せることができ、従来の積層ゴム支承では困難であった
軽量構造物の免震構造や高層建物の動吸振器用支持体等
を形成することが可能となる。As described above, according to the laminated rubber bearing of the present invention, since the laminated steel plate is partially disposed on the main body made of the rubber body, the laminated rubber bearing on which the conventional laminated steel plate is disposed entirely. The rigidity in the horizontal direction can be reduced as compared with the conventional method, making it possible to form seismic isolation structures for lightweight structures and supports for dynamic vibration absorbers in high-rise buildings, which were difficult with conventional laminated rubber bearings. .
【図面の簡単な説明】[Brief description of the drawings]
【図１】この発明の積層ゴム支承の一実施例を示す
（Ａ）は縦断面図、（Ｂ）は横断面図である。FIG. 1A is a longitudinal sectional view and FIG. 1B is a transverse sectional view showing an embodiment of a laminated rubber bearing according to the present invention.
【図２】この発明の積層ゴム支承の種々の変形例を示す
（Ａ）は横断面図、（Ｂ）は縦断面図である。FIGS. 2A and 2B are cross-sectional views showing various modified examples of the laminated rubber bearing of the present invention, and FIG.
【図３】ゴム単体による支承の力学モデルを示す説明図
である。FIG. 3 is an explanatory view showing a dynamic model of a bearing made of rubber alone.
【図４】(i) は、この発明の積層ゴム支承を動吸振器の
支持体として利用した例、(ii)は、軽量構造物の免震構
造の支承として利用した例を示す概略図である。FIG. 4 (i) is a schematic diagram showing an example in which the laminated rubber bearing of the present invention is used as a support for a dynamic vibration absorber, and FIG. 4 (ii) is an example in which it is used as a bearing for a seismic isolation structure of a lightweight structure. is there.
【図５】従来の積層ゴム支承を示す（Ａ）は縦断面図、
（Ｂ）は横断面図である。FIG. 5A is a longitudinal sectional view showing a conventional laminated rubber bearing,
(B) is a transverse sectional view.
１ 積層ゴム支承 ２ ゴム体 ３ 積層鋼板 ４，５ フランジ ６ 中空部 Ｒ ゴム層 Ｐ 鋼板 DESCRIPTION OF SYMBOLS 1 Laminated rubber bearing 2 Rubber body 3 Laminated steel plate 4, 5 Flange 6 Hollow part R Rubber layer P Steel plate
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) E04B 1/36──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) E04B 1/36
Claims (2)
互に積層して一体構造とした積層鋼板と、ゴム体とを一
体的に配設して構成され、前記積層鋼板は、平面視で積
層ゴム支承本体の中心部に位置し、あるいは積層ゴム支
承本体の中心軸線の回りに等間隔をおいて位置するよう
に、前記ゴム体内に埋設されていることを特徴とする軽
量構造物等の積層ゴム支承。1. A laminated steel plate having an integral structure by alternately laminating a rubber layer and a steel plate between upper and lower flanges, and a rubber body.
The laminated steel sheets are stacked in a plan view.
Located in the center of the layered rubber bearing body, or
Be evenly spaced around the center axis of the bearing body
A laminated rubber bearing for a lightweight structure or the like, wherein the rubber bearing is embedded in the rubber body .
互に積層して一体構造とした積層鋼板と、ゴム体とを一The laminated steel sheet and the rubber body
体的に配設して構成され、前記積層鋼板は、前記ゴム体The laminated steel plate is configured so that
が平面視で積層ゴム支承本体の中心部に位置し、あるいIs located at the center of the laminated rubber bearing body in plan view, or
は積層ゴム支承本体の中心軸線の回りに等間隔をおいてAre equally spaced around the center axis of the laminated rubber bearing body.
位置するような平面形状であることを特徴とする軽量構A lightweight structure characterized by a planar shape
造物等の積層ゴム支承。Laminated rubber bearing for structures, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5183857A JP2856035B2 (en) | 1993-07-26 | 1993-07-26 | Laminated rubber bearings for lightweight structures, etc. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5183857A JP2856035B2 (en) | 1993-07-26 | 1993-07-26 | Laminated rubber bearings for lightweight structures, etc. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0734549A JPH0734549A (en) | 1995-02-03 |
| JP2856035B2 true JP2856035B2 (en) | 1999-02-10 |
Family
ID=16143042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5183857A Expired - Lifetime JP2856035B2 (en) | 1993-07-26 | 1993-07-26 | Laminated rubber bearings for lightweight structures, etc. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2856035B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10259852A (en) * | 1997-03-19 | 1998-09-29 | Shimizu Corp | Base isolation vibration control device |
| JP3853011B2 (en) * | 1997-04-02 | 2006-12-06 | 横浜ゴム株式会社 | Fall prevention device for bridges |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0658019B2 (en) * | 1985-04-03 | 1994-08-03 | 株式会社ブリヂストン | Seismic isolation structure |
-
1993
- 1993-07-26 JP JP5183857A patent/JP2856035B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0734549A (en) | 1995-02-03 |
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| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
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