JPH1060816A - Cable vibration control device - Google Patents

Cable vibration control device

Info

Publication number
JPH1060816A
JPH1060816A JP8224211A JP22421196A JPH1060816A JP H1060816 A JPH1060816 A JP H1060816A JP 8224211 A JP8224211 A JP 8224211A JP 22421196 A JP22421196 A JP 22421196A JP H1060816 A JPH1060816 A JP H1060816A
Authority
JP
Japan
Prior art keywords
cables
cable
vibration
wires
joint
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.)
Pending
Application number
JP8224211A
Other languages
Japanese (ja)
Inventor
Kengo Aida
研吾 合田
Shoichi Morikawa
尚一 森川
Renji Kiyota
錬次 清田
Yasuo Imada
安男 今田
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.)
YOKOGAWA BURITSUJI KK
Bridgestone Corp
Original Assignee
YOKOGAWA BURITSUJI KK
Bridgestone Corp
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 YOKOGAWA BURITSUJI KK, Bridgestone Corp filed Critical YOKOGAWA BURITSUJI KK
Priority to JP8224211A priority Critical patent/JPH1060816A/en
Publication of JPH1060816A publication Critical patent/JPH1060816A/en
Pending legal-status Critical Current

Links

Landscapes

  • Bridges Or Land Bridges (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)

Abstract

PROBLEM TO BE SOLVED: To lighten a burden on wire for connecting cables to each other and, at the same time, to provide a vibration control device for controlling vibration of the cables. SOLUTION: Cables 18 are held with joint plates 22, joint wires 42 are held with holders 38, and the cables 18 are connected to each other with the joint wires 42 having specific length. Even if vibration occurs by wind, the vibration of the cables 18 can be controlled by connecting the cables 18 with the joint wires 42 each other. Shear deformation of a high damping rubber damper 34 is made to control twist vibration and flexing vibration by relative displacement of the cables 18 and joint wires 42. By the constitution, since a burden on the joint wires 42 is lightened, fatigue breaking of the joint wires 42 can be prevented.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、斜張橋のケーブル
や送電線等のような空中に並列架張されたケーブルの振
動を減衰させる又は抑制するケーブル用制振装置に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable damping device for attenuating or suppressing the vibration of a cable, such as a cable of a cable-stayed bridge or a transmission line, which is suspended in parallel in the air.

【0002】[0002]

【従来の技術】図6に示すように、斜張橋12では、主
塔16から斜め下方へ所定の間隔で張られた斜材(以下
「ケーブル18」という)で主桁20を吊り下げるよう
になっている。
2. Description of the Related Art As shown in FIG. 6, in a cable-stayed bridge 12, a main girder 20 is suspended by a diagonal member (hereinafter referred to as a "cable 18") which is stretched obliquely downward from a main tower 16 at a predetermined interval. It has become.

【0003】ところが、このようにケーブル18を並列
に架張すると、風によって渦励振、レインバイブレーシ
ョン或いはウェイクギャロッピング等の振動が発生す
る。ウェイクギャロッピングは、風上側のケーブル18
の影響で、風向きに対して交差する方向へ風下側のケー
ブル18が揺れる現象で、比較的低い振動数で低風速か
ら高風速に亘って発現し、その振幅も風速とともに大き
くなる。
However, when the cables 18 are stretched in parallel as described above, winds generate vibrations such as vortex excitation, rain vibration, and wake galloping. Wake galloping is performed on the cable 18 on the windward side.
Is a phenomenon in which the cable 18 on the leeward side swings in a direction intersecting with the wind direction, manifests from a low wind speed to a high wind speed at a relatively low frequency, and its amplitude increases with the wind speed.

【0004】これに対処すべく、ケーブル18の外周面
から突起を突設させ渦を消去して、空力的にケーブル1
8の振動を減衰する対策も採られているが十分でない。
In order to cope with this problem, a projection is projected from the outer peripheral surface of the cable 18 to eliminate eddies, and the cable 1 is aerodynamically driven.
Although measures to attenuate the vibration of No. 8 have been taken, they are not sufficient.

【0005】一方、質量付加、剛性付加、及び構造減衰
の付加を目的として、ワイヤ44でケーブル18を相互
に連結する方法が実用化されており、ケーブル18の振
動対策としての有効性が確認されつつある。
On the other hand, a method of interconnecting the cables 18 with the wires 44 for the purpose of adding mass, rigidity and structural damping has been put to practical use, and its effectiveness as a measure against vibration of the cable 18 has been confirmed. It is getting.

【0006】しかし、ケーブル18の捩れ振動及びたわ
み振動によって、ワイヤ44に負担が掛かり過ぎて、疲
労破壊する恐れがある。
[0006] However, the torsional vibration and the flexural vibration of the cable 18 cause an excessive load on the wire 44, which may cause fatigue failure.

【0007】[0007]

【発明が解決しようとする課題】本発明は係る事実を考
慮し、ケーブルを相互に連結するワイヤ及び連結部の負
担を軽減すると共に、ケーブルの振動を減衰させる又は
抑制するケーブル用制振装置を提供することを課題とす
る。
SUMMARY OF THE INVENTION In view of the above, the present invention provides a cable damping device which reduces the load on wires and connecting portions for connecting cables and attenuates or suppresses vibration of the cables. The task is to provide.

【0008】[0008]

【課題を解決するための手段】請求項1に記載の発明で
は、空中に並列架張されたケーブルが把持手段で把持さ
れている。この把持手段がダンパーを介して連結材を固
定する固定手段と連結されており、この連結材によっ
て、ケーブルが相互に連結される。
According to the first aspect of the present invention, the cables stretched in parallel in the air are gripped by the gripping means. The gripping means is connected to a fixing means for fixing the connecting material via a damper, and the connecting material connects the cables to each other.

【0009】このように、本装置は、ケーブル間の位相
差によってダンパーが作動し、振動エネルギーを吸収す
る。
As described above, in the present apparatus, the damper operates due to the phase difference between the cables, and absorbs vibration energy.

【0010】さらに、ダンパーがケーブルのたわみ振動
及び捩れ振動を抑制することで、連結材の負担が軽減さ
れ、連結材の疲労破壊等が防止される。
Further, the damper suppresses the flexural vibration and the torsional vibration of the cable, so that the load on the connecting member is reduced, and the connecting member is prevented from being broken by fatigue.

【0011】請求項2に記載の発明では、ダンパーが高
減衰ゴムダンパーとされている。このため、制振効果が
さらに向上する。
According to the second aspect of the present invention, the damper is a high damping rubber damper. For this reason, the damping effect is further improved.

【0012】[0012]

【発明の実施の形態】図4には、本形態に係るケーブル
用制振装置10が設けられた斜張橋12が示されてい
る。橋脚14の上に立設された主塔16からは、上下に
所定の間隔でケーブル18が斜め下方へ並列に張られて
いる。このケーブル18は、主塔16の立面から、それ
ぞれ2本を1組として張られており(図5参照)、主桁
20の幅方向の両端部近傍を吊り下げている。
FIG. 4 shows a cable stayed bridge 12 provided with a cable damping device 10 according to the present embodiment. From the main tower 16 erected on the pier 14, cables 18 are stretched obliquely downward and parallel at predetermined intervals vertically. The cable 18 is stretched from an elevation of the main tower 16 as a set of two cables each (see FIG. 5), and suspends the vicinity of both ends in the width direction of the main girder 20.

【0013】一方、図1〜図3に示すように、ケーブル
用制振装置10は、ケーブル18を把持する連結プレー
ト22を備えている。この連結プレート22には、円弧
状のスペーサ24を挟んで、2本のケーブル18を両側
から把持する、波状に湾曲した湾曲部22Aが形成され
ている。この湾曲部22Aの終端からはフランジ部22
Bが張り出しており、両側に配置されたアングル状の連
結板26にボルト28で固定される。この連結プレート
22によって、把持された2本のケーブル18が連結板
26と連結され、一体となって振動するようになってい
る。
On the other hand, as shown in FIGS. 1 to 3, the cable damping device 10 includes a connection plate 22 for holding the cable 18. The connecting plate 22 is formed with a wavy curved portion 22A that holds the two cables 18 from both sides with an arc-shaped spacer 24 interposed therebetween. From the end of the curved portion 22A, the flange portion 22
B projects and is fixed by bolts 28 to angle-shaped connecting plates 26 arranged on both sides. The two cables 18 grasped are connected to the connecting plate 26 by the connecting plate 22, and vibrate integrally.

【0014】この連結板26に、ボルト30でチャンネ
ル状の取付金具32のフランジ部32Aに固定される。
取付金具32の対向する内壁には、高減衰ゴムダンパー
34の固定板34Aがビス止めされ、取付板34Bが連
結ケーブル18を固定するホルダー38に取付けられて
いる。この高減衰ゴムダンパー34を構成する円板状の
高減衰ゴム36は、ここでは損失係数tanδ=0.6
のゴムで成形されており、せん断変形して力学的エネル
ギーの一部を熱エネルギーに変化させ振動エネルギーを
吸収するようになっている。
The connecting plate 26 is fixed to the flange portion 32A of the channel-shaped mounting bracket 32 with bolts 30.
A fixing plate 34A of a high damping rubber damper 34 is screwed to an inner wall of the mounting bracket 32 opposed thereto, and a mounting plate 34B is mounted on a holder 38 for fixing the connection cable 18. The disk-shaped high damping rubber 36 constituting the high damping rubber damper 34 has a loss coefficient tan δ = 0.6 here.
The rubber is sheared and deformed to convert a part of mechanical energy into thermal energy to absorb vibration energy.

【0015】また、ホルダー38の対向面には、ケーブ
ル18と直交する方向に半円状の長溝38Aが延設され
ており、このホルダー38をボルト40で締結すること
によって、両側から連結ワイヤ42を把持できるように
なっている。
A long semicircular groove 38A extends in a direction orthogonal to the cable 18 on the opposing surface of the holder 38. By fastening the holder 38 with a bolt 40, a connecting wire 42 Can be grasped.

【0016】次に、本形態に係るケーブル用制振装置の
作用を説明する。先ず、連結プレート22でケーブル1
8を把持し、ホルダー38で連結ワイヤ42を把持し
て、図4に示すように、並列配置されたケーブル18を
所定長さの連結ワイヤ42で相互に連結する。
Next, the operation of the cable damping device according to this embodiment will be described. First, the cable 1 is connected to the connection plate 22.
8, the connecting wires 42 are gripped by the holder 38, and the cables 18 arranged in parallel are interconnected by the connecting wires 42 of a predetermined length as shown in FIG.

【0017】このように、ケーブル18を連結ワイヤ4
2で相互に連結することで、風による振動が発生して
も、ケーブルの振動を制振することができる。
As described above, the cable 18 is connected to the connecting wire 4.
By interconnecting the cables at 2, the vibration of the cable can be suppressed even when the vibration due to the wind occurs.

【0018】また、図5に示すように、ケーブル18の
捩れ振動及びたわみ振動によって、ケーブル18と連結
ワイヤ42との相対変位によって高減衰ゴムダンパー3
4がせん断変形し、ケーブル18の捩れ振動及びたわみ
振動を抑制する。これによって、連結ワイヤ42の負担
が軽減されるので、連結ワイヤ42の疲労破壊が防止さ
れる。
As shown in FIG. 5, the high damping rubber damper 3 is formed by the relative displacement between the cable 18 and the connecting wire 42 due to the torsional vibration and the bending vibration of the cable 18.
4 undergoes shear deformation and suppresses torsional vibration and flexural vibration of the cable 18. As a result, the load on the connecting wire 42 is reduced, so that the connecting wire 42 is prevented from being broken by fatigue.

【0019】なお、本形態では、斜張橋の並列ケーブル
を例に採って説明したが、風の影響を受ける単一ケーブ
ル、送電線や吊り屋根構造にも適用できる。
In this embodiment, the parallel cable of the cable-stayed bridge has been described as an example. However, the present invention can be applied to a single cable, a transmission line and a suspended roof structure affected by wind.

【0020】また、ダンパーとして、オイルダンパー、
粘性剪断型ダンパー等を使用することもできる。
An oil damper,
A viscous shear type damper or the like can also be used.

【0021】[0021]

【発明の効果】本発明は上記構成としたので、ケーブル
を相互に連結するワイヤや連結部の負担を軽減すること
ができると共に、ケーブルの振動を抑制することができ
る。
According to the present invention having the above-described structure, the burden on the wires and connecting portions for connecting the cables to each other can be reduced, and the vibration of the cables can be suppressed.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本形態に係るケーブル用制振装置の斜視図であ
る。
FIG. 1 is a perspective view of a cable damping device according to an embodiment.

【図2】本形態に係るケーブル用制振装置の平面図であ
る。
FIG. 2 is a plan view of the cable damping device according to the embodiment.

【図3】本形態に係るケーブル用制振装置の側面図であ
る。
FIG. 3 is a side view of the cable damping device according to the embodiment.

【図4】本形態に係るケーブル用制振装置が取付けられ
た斜張橋を示す側面図である。
FIG. 4 is a side view showing a cable-stayed bridge to which the cable vibration damping device according to the present embodiment is attached.

【図5】ケーブルの振動形態を示した斜視図である。FIG. 5 is a perspective view showing a vibration mode of a cable.

【図6】連結ワイヤで連結した従来の斜張橋を示す側面
図である。
FIG. 6 is a side view showing a conventional cable-stayed bridge connected by connecting wires.

【符号の説明】[Explanation of symbols]

22 連結プレート(把持手段) 34 高減衰ゴムダンパー(ダンパー) 38 ホルダー(固定手段) 22 connecting plate (gripping means) 34 high damping rubber damper (damper) 38 holder (fixing means)

───────────────────────────────────────────────────── フロントページの続き (72)発明者 清田 錬次 千葉県船橋市山野町27番地横河テクノビル 株式会社横河ブリッジ技術本部内 (72)発明者 今田 安男 千葉県千葉市美浜区新港88番 株式会社横 河ブリッジ研究所内 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Renji Kiyota 27 Yokogawa Techno Building, Yamano-cho, Funabashi-shi, Chiba Prefecture Inside Yokogawa Bridge Technology Headquarters (72) Inventor Yasuo Imada Shinko, Mihama-ku, Chiba # 88 Inside Yokogawa Bridge Laboratory

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 空中に並列架張されたケーブルの振動を
減衰させる又は抑制するケーブル用制振装置において、 ケーブルを把持する把持手段と、前記ケーブルを相互に
連結する連結材を固定する固定手段と、前記把持手段と
前記固定手段との連結部に配置されたダンパーと、を有
することを特徴とするケーブル用制振装置。
A cable damping device for damping or suppressing the vibration of a cable stretched in parallel in the air, comprising: gripping means for gripping a cable; and fixing means for fixing a connecting member for interconnecting the cables. And a damper disposed at a connection between the gripping means and the fixing means.
【請求項2】 前記ダンパーが高減衰ゴムダンパーであ
ることを特徴とする請求項1に記載のケーブル用制振装
置。
2. The vibration damping device for a cable according to claim 1, wherein the damper is a high damping rubber damper.
JP8224211A 1996-08-26 1996-08-26 Cable vibration control device Pending JPH1060816A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8224211A JPH1060816A (en) 1996-08-26 1996-08-26 Cable vibration control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8224211A JPH1060816A (en) 1996-08-26 1996-08-26 Cable vibration control device

Publications (1)

Publication Number Publication Date
JPH1060816A true JPH1060816A (en) 1998-03-03

Family

ID=16810268

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8224211A Pending JPH1060816A (en) 1996-08-26 1996-08-26 Cable vibration control device

Country Status (1)

Country Link
JP (1) JPH1060816A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832479A1 (en) * 2001-11-19 2003-05-23 Maurer Friedrich Soehne DAMPING DEVICE FOR CABLE
WO2005049923A1 (en) * 2003-11-12 2005-06-02 Freyssinet Device for damping vibrations of a guy-cable array for an engineering construction and corresponding damping method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832479A1 (en) * 2001-11-19 2003-05-23 Maurer Friedrich Soehne DAMPING DEVICE FOR CABLE
WO2005049923A1 (en) * 2003-11-12 2005-06-02 Freyssinet Device for damping vibrations of a guy-cable array for an engineering construction and corresponding damping method
JP2005146837A (en) * 2003-11-12 2005-06-09 Freyssinet Internatl Stup Device attenuating vibration of a plurality of stay sheets of building and damping method corresponding thereto
US7631384B2 (en) 2003-11-12 2009-12-15 Freyssinet Device for damping vibrations of a guy-cable array for an engineering construction and corresponding damping method
JP4504716B2 (en) * 2003-11-12 2010-07-14 フレシネ Apparatus for damping vibrations of a plurality of sheets of a building and a damping method corresponding thereto

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