JPH04189969A - Base isolation - Google Patents

Base isolation

Info

Publication number
JPH04189969A
JPH04189969A JP31592090A JP31592090A JPH04189969A JP H04189969 A JPH04189969 A JP H04189969A JP 31592090 A JP31592090 A JP 31592090A JP 31592090 A JP31592090 A JP 31592090A JP H04189969 A JPH04189969 A JP H04189969A
Authority
JP
Japan
Prior art keywords
rubber
floor
lower frame
seismic isolation
frame
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.)
Granted
Application number
JP31592090A
Other languages
Japanese (ja)
Other versions
JP2541871B2 (en
Inventor
Mototaka Matsuno
松野 元隆
Yoshiaki Ito
嘉朗 伊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hazama Ando Corp
Original Assignee
Hazama Gumi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hazama Gumi Ltd filed Critical Hazama Gumi Ltd
Priority to JP2315920A priority Critical patent/JP2541871B2/en
Publication of JPH04189969A publication Critical patent/JPH04189969A/en
Application granted granted Critical
Publication of JP2541871B2 publication Critical patent/JP2541871B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To reduce height by installing high damping multistage lamination rubbers installed at plural positions on a floor slab, upper and lower frames and a supporting member for fixing a floor panel over the lower frame. CONSTITUTION:A high damping type multistage lamination rubber 2 is erected on a floor slab 1, and an upper frame 3 is installed, and lower frames 5 are suspended at plural places through wires 4 as connecting members, and a pendulum structure which is relatively shiftable is formed. Then, the vibration of an earthquake, etc., is reduced by the pendulum structure due to the rubber 2 and the member 4, during the time when the vibration is transmitted to a floor panel 7 fixed on the frame 5. Accordingly, the pendulum structures due to the rubber 2 and the member 4 are connected in series in equivalent form, and the height of the slab 1 and the floor panel 7 can be suppressed by adjusting the piling height of the rubber 2, maintaining the earthquakeproof function.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、原子炉建屋、電算機室及び半導体工場等にお
いて、精密機器が設置された床に加わる振動を低減する
免震床構造に関する。
DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a seismic isolation floor structure that reduces vibrations applied to floors on which precision equipment is installed in nuclear reactor buildings, computer rooms, semiconductor factories, etc.

〈従来の技術〉 従来から様々な免震床装置及び免震床構造が提案されて
いる。
<Prior Art> Various seismic isolation floor devices and seismic isolation floor structures have been proposed in the past.

例えば、ゴム状弾性体を上下に複数個積み重ね。For example, multiple rubber-like elastic bodies are stacked one above the other.

各段のゴム弾性体の上下端面を安定板で連結した多段型
免震床装置(特開昭62−41874)が提案されてお
り、この装置によって、高減衰多段積層ゴムの座屈なし
に水平方向の固有振動数を十分下げることができるもの
である。
A multi-stage seismic isolation floor device (Japanese Unexamined Patent Publication No. 62-41874) has been proposed in which the upper and lower end surfaces of the rubber elastic bodies of each stage are connected by stabilizing plates. With this device, the high-damping multi-layered rubber layers can be leveled without buckling. It is possible to sufficiently lower the natural frequency in the direction.

〈発明が解決しようとする課題〉 しかし、前記高減衰多段積層ゴムを使用して固有振動数
を十分低減させるには、安定板を介して積層ゴムを多段
に亘って高く積み上げなければならず、このため、高減
衰多段積層ゴムを設置した床スラブに対して、支持され
るフロアパネルの位置が高くなるという問題点あった。
<Problems to be Solved by the Invention> However, in order to sufficiently reduce the natural frequency using the high damping multi-layered rubber, it is necessary to stack the rubber layers high in multiple stages via a stabilizing plate. For this reason, there was a problem in that the supported floor panel was positioned higher than the floor slab on which the high-damping multi-layer laminated rubber was installed.

そこで、この高さを低減する構造として、沫スラブに高
減衰多段積層ゴムを立ち上げてその上に支持部材を固定
し、この支持部材にこの支持部材に比べて下方に位置す
るフレームを固定すると共に、前記フレームにフロアパ
ネル−を固定する免震床システム(実開平2−1884
8号)が提案されている。
Therefore, as a structure to reduce this height, a high-damping multi-layer laminated rubber is set up on the splash slab, a support member is fixed on top of it, and a frame located below the support member is fixed to this support member. In addition, a seismic isolation floor system (Utility Model Publication No. 2-1884) was developed to fix the floor panel to the frame.
No. 8) has been proposed.

このシステムによれば、フロアパネルの位置をある程度
下げることはできるが、免震機能を維持するため、前記
高減衰多段積層ゴムを従来と同じ高さに積み上げており
、床スラブとフロアパネルとの間の高さを低く抑える上
で、高減衰多段積層ゴムを低く構成し、しかも従来の免
震機能を維持する免震構造が望まれていた。
According to this system, the position of the floor panel can be lowered to some extent, but in order to maintain the seismic isolation function, the high-damping multi-layered rubber is stacked at the same height as before, and the floor panel and floor panel are stacked at the same height. In order to keep the height of the building low, there was a desire for a seismic isolation structure in which the high-damping multi-layered rubber was constructed low, while maintaining the conventional seismic isolation function.

本発明は上記課題に鑑みてなされたものであり。The present invention has been made in view of the above problems.

その目的は、高減衰多段積層ゴムの積み上げ高さを低く
構成した場合にも、従来と同様な免震機能登維持して、
床スラブとフロアパネルとの間の高さを低く抑えること
のできる免震床構造を提供することにある。
The purpose of this is to maintain the same seismic isolation function as before, even when the stacking height of high-damping multi-layered rubber is configured to be low.
To provide a seismic isolation floor structure capable of keeping the height between a floor slab and a floor panel low.

〈課題を解決するための手段〉 本発明は、上記目的に鑑みてなされたものであり、その
要旨は、床スラブの複数位置に設置した高減衰多段積層
ゴムと、該高減衰多段積層ゴム間に架設する上方フレー
ムと、該上方フレームの下方に連結部材を介して懸吊す
る下方フレームと、該下方フレームの上方にフロアパネ
ルを固定するための支持部材とからなり、前記高減衰多
段積層ゴムと前記連結部材とを等価的に直列に接続する
ことを特徴とする免震床構造にある。
<Means for Solving the Problems> The present invention has been made in view of the above object, and the gist thereof is to provide highly attenuated multi-layered laminated rubber installed at multiple positions of a floor slab, and a structure in which the high-damped multi-layered laminated rubber is installed at multiple positions on a floor slab. The lower frame is suspended below the upper frame via a connecting member, and the support member for fixing the floor panel above the lower frame is constructed of the high damping multi-layered rubber. and the connecting member are connected equivalently in series.

また、本発明の他の要旨は、前記免震床構造において、
前記下方フレームと床スラブとの間に、弾性変形によっ
て振動を吸収する弾性部材と摩擦力による減衰作用を有
する摩擦材とを直列に介設し、かつ、前記弾性部材には
、前記下方フレームと床スラブによって圧縮面圧を加え
配設して成る免震床構造にある。
Further, another gist of the present invention is that in the seismic isolation floor structure,
An elastic member that absorbs vibrations through elastic deformation and a friction material that has a damping effect due to frictional force are interposed in series between the lower frame and the floor slab, and the elastic member is connected to the lower frame. It has a seismic isolation floor structure with floor slabs that apply compressive surface pressure.

〈作用〉 下方フレームは、連結部材を介して上方フレームに懸吊
されており、このため、下方フレームと上方フレームと
は、相対的に変位可能な振り子構造を成す。
<Operation> The lower frame is suspended from the upper frame via a connecting member, and therefore the lower frame and the upper frame form a pendulum structure that is relatively movable.

そこで、床スラブに地震動等が加わった場合、この振動
は前記高減衰多段積層ゴムで低減された後、前記上方フ
レームに伝わる。さらに、該上方フレームから連結部材
を介して前記下方フレームに伝達される。この際、下方
フレーム側が振り子の支点側として働くため、上方フレ
ームでの振動が下方フレーム側では低減されるものであ
る。
Therefore, when seismic motion or the like is applied to the floor slab, this vibration is transmitted to the upper frame after being reduced by the high-damping multi-layered rubber. Furthermore, the signal is transmitted from the upper frame to the lower frame via a connecting member. At this time, since the lower frame side serves as the fulcrum side of the pendulum, vibrations in the upper frame are reduced on the lower frame side.

このように、前記高減衰多段積層ゴムと前記連結部材に
よる振り子構造とを等価的に直列に接続し、この双方の
作用により、前記下方フレームに固定したフロアパネル
に加わる振動を低減するものである。
In this way, the high-damping multi-layer laminated rubber and the pendulum structure formed by the connecting member are equivalently connected in series, and the action of both reduces vibrations applied to the floor panel fixed to the lower frame. .

〈実施例〉 本発明に係る免震床構造を添付図面に基づいて説明する
<Example> A seismic isolation floor structure according to the present invention will be explained based on the attached drawings.

第1図及び第2図に示すように、床スラブ1の4箇所に
高減衰性多段積層ゴム2を立ち上げ、この上に上方フレ
ーム3を枠状に構築する。また、対向する一対の上方フ
レーム3では、連結部材としてのワイヤー4を介して格
子状に組まれた下方フレーム5を複数箇所で懸吊してお
り、このため、上方フレーム3と下方フレーム5とは、
ワイヤー4を介して相対的に変位可能な振り子構造を成
している。さらに、下方フレーム5には、支持部材とし
てのペデスタル6を上方に向って立設し、その上端部に
フロアパネル7を固定している。
As shown in FIGS. 1 and 2, high-damping multi-layer laminated rubber 2 is erected at four locations on a floor slab 1, and an upper frame 3 is constructed thereon in a frame shape. Further, in a pair of opposing upper frames 3, lower frames 5 assembled in a lattice shape are suspended at a plurality of locations via wires 4 as connecting members. teeth,
It has a pendulum structure that can be relatively displaced via a wire 4. Further, a pedestal 6 serving as a support member is erected upward on the lower frame 5, and a floor panel 7 is fixed to the upper end of the pedestal 6.

一方、床スラブ1と下方フレーム5との間には、第3図
に示すような、鉛直・水平方向に適当なばね定数を有す
るソフトラウンディング8を介設している。このソフト
ラウンディング8の構造は、下方フレーム5の下面に、
弾性変形によって振動を吸収する弾性部材としての高減
衰積層ゴム8aを取り付け、その下面に摩擦材としての
底摩擦板8bを固定すると共に、床スラブlにすヘリ板
8cを固定し、このすべり板8cの略中心位置に前記底
摩擦板8bが位置するように配置する。この際、ソフト
ラウンディング8にトリガーがかかった状態とするため
、前記高減衰積層ゴム8aに、僅かに鉛直方向の圧縮面
圧が加わるように下方フレーム5によって加えられる荷
重をrij整しておく。
On the other hand, a soft rounding 8 having appropriate spring constants in the vertical and horizontal directions is interposed between the floor slab 1 and the lower frame 5, as shown in FIG. The structure of this soft rounding 8 is such that on the lower surface of the lower frame 5,
A high-damping laminated rubber 8a as an elastic member that absorbs vibrations through elastic deformation is attached, a bottom friction plate 8b as a friction material is fixed to the lower surface of the rubber, and a hem plate 8c is fixed to the floor slab l. The bottom friction plate 8b is positioned approximately at the center of the bottom friction plate 8c. At this time, in order to bring the soft rounding 8 into a triggered state, the load applied by the lower frame 5 is adjusted so that a slight compressive surface pressure in the vertical direction is applied to the high damping laminated rubber 8a. .

かかる構成よりなる免震床構造では、地震動等の振動が
床スラブ1に加わると、床スラブ1は主として固有周期
で平面内前後・左右方向に揺動する。この揺動が前記高
減衰多段積層ゴム2を介して低減され、その上部に固定
した上方フレーム3に伝わる。さらに、この揺動が、上
方フレーム3から、ワイヤー4を介して下方フレーム5
に伝達される。
In the seismic isolation floor structure having such a configuration, when vibrations such as seismic vibrations are applied to the floor slab 1, the floor slab 1 mainly oscillates in the longitudinal and lateral directions within the plane at a natural period. This vibration is reduced through the high-damping multi-layered rubber 2 and transmitted to the upper frame 3 fixed to the upper part thereof. Furthermore, this swinging is transmitted from the upper frame 3 to the lower frame 5 via the wire 4.
transmitted to.

ここで、前述したように上方フレーム3と下方フレーム
5とは、ワイヤー4を介して振り子構造を成しており、
前記揺動が伝達される際には、下方フレーム5側が振り
子の支点側として働くため、上方フレーム3の揺動が下
方フレーム5側では低減されるものである。従って、床
スラブlに加わった地震動等の振動は、下方フレーム5
に固定したフロアパネル7に至る間に、高減衰多段積層
ゴム2とワイヤー4による振り子構造とによって低減さ
れるものである。
Here, as mentioned above, the upper frame 3 and the lower frame 5 form a pendulum structure via the wire 4,
When the swing motion is transmitted, the lower frame 5 side acts as the fulcrum side of the pendulum, so the swing motion of the upper frame 3 is reduced on the lower frame 5 side. Therefore, vibrations such as seismic motion applied to the floor slab l will be absorbed by the lower frame 5.
This is reduced by the pendulum structure formed by the high-damping multi-layered rubber 2 and the wire 4 while reaching the floor panel 7 fixed to the floor panel 7.

この場合、ソフトラウンデイグ8の機能は、すベリ板8
cに対して底摩擦板8bが滑動しない低負荷状態におい
ては、前記地震動等によって伝わる下方フレーム5の揺
れを、高減衰積層ゴム8aのせん断変形によって吸収す
る。また、地震動等の揺れが激しくなる大負荷状態にお
いては、低摩擦板8bとすべり板8cとの間に滑動を生
じ、この水平方向の運動エネルギーを両者の摩擦による
熱エネルギーに変換して水平方向の振動を低減するもの
である。
In this case, the function of the soft rounding plate 8 is
In a low-load state in which the bottom friction plate 8b does not slide relative to c, the vibration of the lower frame 5 transmitted by the seismic motion or the like is absorbed by shear deformation of the high-damping laminated rubber 8a. In addition, under heavy load conditions where shaking such as earthquake motion is intense, sliding occurs between the low-friction plate 8b and the sliding plate 8c, and this horizontal kinetic energy is converted into thermal energy due to the friction between the two. This reduces the vibration of the

本実施例では、連結部材としてワイヤー4を例示したが
、ワイヤーの代わりに棒部材を用い、その両端部を自在
継手等を介してそれぞれ上・下フレームに連結する等、
上・下フレームが互いに変位可能な振り子構造に連結で
きれば回答限定するものではない。
In this embodiment, the wire 4 is used as an example of the connecting member, but instead of the wire, a rod member is used, and both ends of the rod member are connected to the upper and lower frames through a universal joint, etc.
The answer is not limited as long as the upper and lower frames can be connected to form a pendulum structure that can be mutually displaced.

また、ソフトラウンディング8では、高減衰積層ゴムを
用いたが、コイルばね、皿ばね或は板ばね等を用いても
良く、さらに、底低摩擦板の代わりにローラー、ボール
ベアリング等の低摩擦部材を用いることが可能である。
In addition, although high-damping laminated rubber is used in Soft Rounding 8, coil springs, disc springs, leaf springs, etc. may also be used, and low-friction materials such as rollers and ball bearings may be used instead of the bottom low-friction plate. It is possible to use members.

〈効果〉 本発明に係る免震床構造によれば、上方フレームを床ス
ラブに設置した高減衰多段積層ゴム間に架設したので、
前記床スラブに伝わった地震動等の振動は、前記高減衰
多段積層ゴムによって上方フレーム側で低減することが
できる。
<Effects> According to the seismic isolation floor structure according to the present invention, since the upper frame is installed between the high-damping multi-layered rubber laminated rubber installed on the floor slab,
Vibrations such as seismic motion transmitted to the floor slab can be reduced on the upper frame side by the high damping multi-layered rubber.

また、前記上方フレームから連結部材を介して下方フレ
ームを懸吊したので、前記上方フレームと下方フレーム
とは相対的に変位可能な振り子構造を成し、前記下方フ
レーム側が振り子の支点側として働くため、前記上方フ
レームでの振動を下方フレーム側で低減することができ
る。
Further, since the lower frame is suspended from the upper frame via the connecting member, the upper frame and the lower frame form a pendulum structure that can be relatively displaced, and the lower frame side acts as the fulcrum side of the pendulum. , vibrations in the upper frame can be reduced on the lower frame side.

従って、前記高減衰多段積層ゴムと、該高減衰、 多段
積層ゴムの上端部から下方に向って折り返した前記連結
部材による振り子構造とを等測的に直列に接続した構造
であるため、従来と同様な免震機能を維持しつつ、高減
衰多段積層ゴムの積み上げ高さを低く抑えることができ
るため、従来に比べ、床スラブとフロアパネルとの高さ
を低く抑えることが可能となる。
Therefore, since the structure is such that the high-damping multi-layered rubber and the pendulum structure formed by the connecting member folded downward from the upper end of the high-damping multi-layered rubber are connected isometrically in series, it is different from the conventional structure. While maintaining the same seismic isolation function, the stacking height of the high-damping multi-layered rubber can be kept low, making it possible to keep the height of the floor slab and floor panel lower than before.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明に係る免震床構造をフロアパネルを取り
去った状態を示す平面図、第2図は免震床構造の側面図
、第3図はソフトラウンディングを拡大して示す側面図
である。 1・・床スラブ、2・・高減衰多段積層ゴム、3・・上
方フレーム、4・・ワイヤー(連結部材)、5・・下方
フレーム、6・・ペデスタル(支持部材)、7・・フロ
アパネル。
Fig. 1 is a plan view showing the seismic isolation floor structure according to the present invention with the floor panel removed, Fig. 2 is a side view of the seismic isolation floor structure, and Fig. 3 is an enlarged side view showing the soft rounding. It is. 1. Floor slab, 2. High damping multi-layer laminated rubber, 3. Upper frame, 4. Wire (connecting member), 5. Lower frame, 6. Pedestal (supporting member), 7. Floor panel. .

Claims (1)

【特許請求の範囲】 1)床スラブの複数位置に設置した高減衰多段積層ゴム
と、該高減衰多段積層ゴム間に架設する上方フレームと
、該上方フレームの下方に連結部材を介して懸吊する下
方フレームと、該下方フレームの上方にフロアパネルを
固定するための支持部材とからなり、前記高減衰多段積
層ゴムと前記連結部材とを等価的に直列に接続すること
を特徴とする免震床構造。 2)前記下方フレームと床スラブとの間には、弾性変形
によって振動を吸収する弾性部材と摩擦力による減衰作
用を有する摩擦材とを直列に介設し、かつ、前記弾性部
材には、前記下方フレームと床スラブによって圧縮面圧
を加えて配設することを特徴とする請求項1記載の免震
床構造。
[Claims] 1) High-damping multi-layered laminated rubber installed at multiple positions on a floor slab, an upper frame installed between the high-damping multi-layered rubber, and suspended below the upper frame via a connecting member. A seismic isolation system comprising a lower frame for fixing a floor panel above the lower frame, and a support member for fixing a floor panel above the lower frame, and the seismic isolation is characterized in that the high damping multi-layered rubber and the connecting member are equivalently connected in series. floor structure. 2) An elastic member that absorbs vibration through elastic deformation and a friction material that has a damping effect due to frictional force are interposed in series between the lower frame and the floor slab, and the elastic member has the 2. The seismic isolation floor structure according to claim 1, wherein the seismic isolation floor structure is arranged by applying compressive surface pressure by a lower frame and a floor slab.
JP2315920A 1990-11-22 1990-11-22 Seismic isolation floor structure Expired - Lifetime JP2541871B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2315920A JP2541871B2 (en) 1990-11-22 1990-11-22 Seismic isolation floor structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2315920A JP2541871B2 (en) 1990-11-22 1990-11-22 Seismic isolation floor structure

Publications (2)

Publication Number Publication Date
JPH04189969A true JPH04189969A (en) 1992-07-08
JP2541871B2 JP2541871B2 (en) 1996-10-09

Family

ID=18071196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2315920A Expired - Lifetime JP2541871B2 (en) 1990-11-22 1990-11-22 Seismic isolation floor structure

Country Status (1)

Country Link
JP (1) JP2541871B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104110076A (en) * 2014-06-23 2014-10-22 同济大学 Tensile limiting combined type seismic isolation support
US11229095B2 (en) 2014-12-17 2022-01-18 Campbell Soup Company Electromagnetic wave food processing system and methods
WO2023129074A1 (en) * 2021-12-30 2023-07-06 Bogazici Universitesi Horizontal vibration isolation system with multi-tensioning wires having quasi-zero adjustable stiffness in three axes

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6398926U (en) * 1986-12-16 1988-06-27
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* Cited by examiner, † Cited by third party
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CN104110076A (en) * 2014-06-23 2014-10-22 同济大学 Tensile limiting combined type seismic isolation support
CN104110076B (en) * 2014-06-23 2016-08-24 同济大学 A kind of spacing combined shock isolating pedestal of tension
US11229095B2 (en) 2014-12-17 2022-01-18 Campbell Soup Company Electromagnetic wave food processing system and methods
WO2023129074A1 (en) * 2021-12-30 2023-07-06 Bogazici Universitesi Horizontal vibration isolation system with multi-tensioning wires having quasi-zero adjustable stiffness in three axes

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