JPH0483008A - Damping method of cable in cable stayed bridge - Google Patents
Damping method of cable in cable stayed bridgeInfo
- Publication number
- JPH0483008A JPH0483008A JP19851690A JP19851690A JPH0483008A JP H0483008 A JPH0483008 A JP H0483008A JP 19851690 A JP19851690 A JP 19851690A JP 19851690 A JP19851690 A JP 19851690A JP H0483008 A JPH0483008 A JP H0483008A
- Authority
- JP
- Japan
- Prior art keywords
- cable
- vibration
- damping
- stayed bridge
- cylinder
- 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
Links
- 238000013016 damping Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 11
- 239000007788 liquid Substances 0.000 claims description 7
- 230000002238 attenuated effect Effects 0.000 claims description 2
- 238000005192 partition Methods 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract 3
- 238000000638 solvent extraction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 210000005240 left ventricle Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 210000005241 right ventricle Anatomy 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は斜張橋におけるケーブルの振動を止める方法に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for stopping cable vibration in a cable-stayed bridge.
（従来の技術）
主塔から斜め下方に延びたケーブルに補剛桁を結合した
斜張橋は、そのスマートで近代的なフォルムが近年にわ
かに脚光を浴びつつあり、橋梁デザインの最新モードを
い（「オシャレ」な橋として、優美で近代的な景観をか
もしだしている。ところが、この斜張橋の優美な景観を
出すケーブルの振動が大きな問題となっている。(Prior Technology) Cable-stayed bridges, in which stiffening girders are connected to cables extending diagonally downward from the main tower, have suddenly been attracting attention in recent years for their sleek and modern form, and are the latest mode in bridge design. As a ``fashionable'' bridge, it creates an elegant and modern landscape.However, the vibration of the cables that give this cable-stayed bridge its elegant landscape has become a major problem.
即ち、主塔から補剛桁にわたって斜めに張設されたケー
ブルが、風、雨及び補則桁上を歩行する車両等で振動し
、その振動は補剛桁を結合するケーブルに金属疲労を招
き、最悪の場合はケーブルが切断するといったことにな
る。In other words, the cables strung diagonally from the main tower to the stiffening girders vibrate due to wind, rain, and vehicles walking on the supplementary girders, and the vibrations cause metal fatigue in the cables connecting the stiffening girders. In the worst case scenario, the cable may break.
そのため、斜張橋を管理する公団、或いはこれら橋梁を
建設する会社等はケーブルの振動を止める方法について
夫々研究しており、現在、施工されている方法は各ケー
ブル相互をワイヤーで結ぶといった方法である。For this reason, the public corporations that manage cable-stayed bridges and the companies that construct these bridges are researching ways to stop the vibrations of the cables, and the current construction method is to connect each cable with wire. be.
（発明が解決しようとする課題）
上記したケーブル相互をワイヤーで結ぶ方法は、たしか
にケーブルの振動を止めることについては十分にその目
的が達成されるが、斜張橋が有する優美な景観が損なわ
れるという問題を有する。(Problem to be solved by the invention) Although the method of connecting cables with each other using wires as described above certainly achieves the purpose of stopping vibration of the cables, it spoils the elegant scenery of the cable-stayed bridge. There is a problem.
この斜めに張られたケーブルがかもしだす優美な景観が
損なわれてしまうと斜張橋としての良さが全く無くなっ
てしまうものである。If the graceful scenery created by these diagonally strung cables were to be lost, the merits of a cable-stayed bridge would be completely lost.
本発明は上述した如き従来の技術の有する問題点に鑑み
てなされたもので、その目的とする処は、ケーブルがか
もし出す優美な景観を損なわずに、該ケーブルの振動を
防止することが出来る方法を提供することにある。The present invention has been made in view of the problems of the conventional technology as described above, and its purpose is to provide a method for preventing vibration of cables without impairing the graceful scenery created by the cables. Our goal is to provide the following.
（課題を解決するための手段）
上記目的を達成するために、本発明におけるケーブルの
制振方法は、主塔と補剛桁とに渉って架設されたケーブ
ルの長さ方向の略中央位置の外側に、気体又は液体を封
入した環状の袋体を介してある重さを有した筒体を配置
し、ケーブルが振動によって軸芯と直交する方向へ移動
する作用と、そのケーブルの移動に伴なって気体又は液
体を介して移動する筒体の反作用を衝突させてケーブル
の振れを減衰制振することを特徴とする。(Means for Solving the Problems) In order to achieve the above object, the cable vibration damping method according to the present invention is directed to a cable installed across a main tower and a stiffening girder, at a position approximately at the center in the length direction of the cable. A cylindrical body with a certain weight is placed on the outside of the cable through an annular bag filled with gas or liquid. It is characterized by attenuating vibration of the cable by colliding the reaction force of the cylindrical body moving through gas or liquid.
（作 用）
上記方法によれば、風或いは補剤桁上を走向する車両に
よってケーブルに振動が生じた場合、そのケーブルが軸
芯と直交する方向に移動すると、その周面に装着された
気体又は液体を封入した環状の袋体はその移動方向側が
筒体との間で圧迫され、ケーブルが反対方向に移動しよ
うとした時、先の袋体の作用でケーブルの移動方向と同
方向に時間差を有して移動する袋体と衝突し、ケーブル
の振動が減衰される。(Function) According to the above method, when vibration occurs in the cable due to wind or a vehicle running on the supplementary girder, when the cable moves in a direction perpendicular to the axis, the gas attached to the circumferential surface of the cable vibrates. Alternatively, the annular bag filled with liquid is compressed between the moving direction side and the cylindrical body, and when the cable tries to move in the opposite direction, there is a time difference in the same direction as the cable moving direction due to the action of the previous bag. The cable collides with the moving bag, and the vibration of the cable is damped.
（発明の効果）
本発明の斜張橋におけるケーブルの制振方法は以上の如
き構成としたものであるから、ケーブルに発生する振動
は、該ケーブルの振動で生じる移動作用と、その移動に
伴なって作動される気体又は液体を封入した袋体及びそ
の外側の筒体の時間差を有しての反対方向への移動作用
の衝突で打ち消し合い、振動を減衰、制振することがで
きる。(Effects of the Invention) Since the cable vibration damping method in a cable-stayed bridge of the present invention has the above-described configuration, the vibration generated in the cable is caused by the movement effect caused by the vibration of the cable and the movement accompanying the movement. The movement of the bag containing the gas or liquid and the cylindrical body outside the bag that moves in opposite directions with a time difference cancel each other out by collision, thereby damping and suppressing vibrations.
しかも、上記の動作はケーブルが振動を開始すると同時
に機能するため、振幅の小さい振動の初期において効果
的に制振することができる。Furthermore, since the above-mentioned operation is performed at the same time as the cable starts to vibrate, it is possible to effectively damp vibrations at the beginning of small-amplitude vibrations.
又、上記の制振手段は各ケーブルに取付けるため、ケー
ブルがかもし出す優美な景観を損なうことが無く、非常
に有益である。Furthermore, since the above-mentioned vibration damping means is attached to each cable, it does not spoil the graceful scenery created by the cables, which is very beneficial.
（実施例）
以下、本発明の制振方法を図面の原理図を基に説明する
。(Example) Hereinafter, the vibration damping method of the present invention will be explained based on the principle diagram of the drawing.
第１図は斜張橋の一部を示す概略図で、主塔１の上部か
ら斜め下方に延びたケーブル２に補剛桁３が直接結合さ
れて斜張橋が構成されており、その各ケーブル２の長さ
方向の略中央位置に制振装置Ａが装備されている。Figure 1 is a schematic diagram showing a part of a cable-stayed bridge.The cable-stayed bridge is constructed by directly connecting stiffening girders 3 to cables 2 extending diagonally downward from the top of the main tower 1. A vibration damping device A is installed approximately at the center of the cable 2 in the length direction.
その制振装置Ａは、気体又は液体を封入した環状の袋体
４と、その袋体４の外側に嵌合する金属製の筒体５とか
ら成り、上記袋体４は中央で左右の室４ｍ、 ４ｂに区
画されると共に、その左右の室に区画する仕切壁６には
一方向弁７が設けられている。そして、この袋体４は筒
体５内に４個配設するとに、ケーブルの長手方向に沿っ
た両側に位置する袋体４と、その間に位置する２個の袋
体４は仕切壁６の位置を９０°ずらして設けられている
。The vibration damping device A consists of an annular bag 4 filled with gas or liquid, and a metal cylinder 5 that fits on the outside of the bag 4. The bag 4 has left and right chambers in the center. The chamber is divided into 4m and 4b, and a one-way valve 7 is provided on a partition wall 6 that divides the left and right chambers. When four bags 4 are disposed inside the cylinder 5, the bags 4 located on both sides along the longitudinal direction of the cable, and the two bags 4 located between them are located on the partition wall 6. The positions are shifted by 90 degrees.
即ち、４個の袋体４のうち、左右両側の２個はケーブル
２が左右方向に移動した時作用し、中間の２個はケーブ
ル２が前後方向に移動した時作用するようにしである。That is, of the four bags 4, two on both the left and right sides act when the cable 2 moves in the left-right direction, and the two in the middle act when the cable 2 moves in the front-back direction.
従って、この袋体４の取付個数は、ケーブル２の３６０
°の方向の移動に対してきめ細かく対応させようとした
場合、それに応じて増加し、且つ２個１組となして仕切
壁の方向をずらして配設する。Therefore, the number of attached bags 4 is 360 for the cable 2.
If it is desired to respond precisely to the movement in the direction of 0.5 degrees, the number of partition walls will be increased accordingly, and the partition walls will be arranged in sets of two, with the directions of the partition walls being shifted.
次に、上記制振装置Ａの作動について説明すると、ケー
ブル２が振動しない静止した状態ではケーブル２が袋体
４の中心に位置し、袋体４の右室４ａと左室４ｂは同じ
圧力に保持されている。（第７図（３）参照）
その状態からケーブル２に振動が発生し、ケーブル２が
左右方向に移動した時４個の袋体４のうち、外側に配置
された２個の袋体４が反応し、ケーブルの振動を減衰、
制振する。Next, to explain the operation of the vibration damping device A, when the cable 2 is at rest and does not vibrate, the cable 2 is located at the center of the bag body 4, and the right chamber 4a and left chamber 4b of the bag body 4 are at the same pressure. Retained. (Refer to Fig. 7 (3)) When the cable 2 vibrates from this state and moves in the left-right direction, the two outer bags 4 out of the four bags 4 reacts and damps cable vibrations,
Dampen vibrations.
即ち、ケーブル２が右方向に移動すると袋体４の右室４
ａの気体（空気）は一方向弁７を開いて左室４ｂに流入
しく第７図（ｂ）参照）、ケーブル２が左方向に戻ろう
とすると一方向弁７は左室４ｂの圧力で閉じられ、袋体
４は筒体５を右方向へ移動させる。（第７図（Ｃ）参照
）
それによってケーブル２の移動作用と、時間差をおいて
右方向へ移動しようとする袋体４及び筒体５が衝突し、
振動は減衰されケーブル２の移動量は小さくなるが、再
び第７図（ｂ）の如き動きをして第７図（ｄ）の如くな
り、この第７図（Ｃ）と第７図（ｄ）を数回繰り返して
振幅が小さくなり、第７図（ｅ）の如く静止の状態とな
る。That is, when the cable 2 moves to the right, the right ventricle 4 of the bag 4
The gas (air) in a opens the one-way valve 7 and flows into the left ventricle 4b (see Figure 7(b)), and when the cable 2 tries to return to the left, the one-way valve 7 closes due to the pressure of the left ventricle 4b. The bag body 4 moves the cylinder body 5 to the right. (See Figure 7(C)) As a result, the moving action of the cable 2 collides with the bag body 4 and cylinder body 5, which are moving to the right after a time difference.
The vibration is attenuated and the amount of movement of the cable 2 becomes smaller, but it moves again as shown in Fig. 7(b) and becomes as shown in Fig. 7(d). ) is repeated several times, the amplitude decreases, and the state becomes stationary as shown in FIG. 7(e).
以上はケーブル２が左右方向に移動した場合の制振作用
であるが、その他の方向も同様にして制振されるもので
ある。The above is a damping effect when the cable 2 moves in the left and right direction, but vibrations are damped in the same way in other directions.
又、上記の減衰、制振を行なう袋体４は、振動の初期に
おいて作動するため外径寸法はそれほど大きくなくても
良く、軸方向の長さ（厚さ）がある程度あれば良いため
、ケーブル２の外側に取付けた場合目立たず、斜張橋の
景観を損ねることがない。In addition, since the bag body 4 that performs the above-mentioned damping and vibration suppression operates at the initial stage of vibration, the outer diameter does not need to be very large, and only needs to have a certain length (thickness) in the axial direction. When installed on the outside of the cable-stayed bridge, it is inconspicuous and does not spoil the view of the cable-stayed bridge.
図面は本発明方法の実施例を示し、第１図は斜張橋の一
部を示す正面図、第２図は制振装置の概略を示す断面図
、第３図乃至第６図は第２図の（３） −（３）線、（
４）−（４）線、（５）−（５）線、（６）−（６）線
に沿える断面図、第７図（ａ）〜（ｅ）は制振装置の動
作順を示す断面図である。
図中、１：主塔、 ２：ケーブル３：補剛桁、
４：袋体
５：筒体 Ａ：制振装置
特許出願人 株式会社大滝油圧The drawings show an embodiment of the method of the present invention, in which Fig. 1 is a front view showing a part of a cable-stayed bridge, Fig. 2 is a sectional view schematically showing a vibration damping device, and Figs. (3) - (3) line in the figure, (
4) - (4) line, (5) - (5) line, (6) - (6) sectional view taken along line (6) - (6) Figure 7 (a) to (e) shows the operating order of the vibration damping device FIG. In the diagram, 1: Main tower, 2: Cable 3: Stiffening girder,
4: Bag body 5: Cylindrical body A: Vibration damping device patent applicant Otaki Hydraulic Co., Ltd.
Claims (1)
斜張橋におけるケーブルの制振方法であって、主塔と補
剛桁とに渉って架設されたケーブルの長さ方向の略中央
位置の外側に、気体又は液体を封入した環状の袋体を介
してある重さを有した筒体を配置し、ケーブルが振動に
よって軸芯と直交する方向へ移動する作用と、そのケー
ブルの移動に伴なって気体又は液体を介して移動する筒
体の反作用を衝突させてケーブルの振れを減衰制振する
ことを特徴とするケーブルの制振方法。A cable vibration damping method in a cable-stayed bridge in which a stiffening girder is held by a cable extending diagonally downward from the main tower, and is an abbreviation for the length direction of the cable installed across the main tower and the stiffening girder. A cylindrical body with a certain weight is placed outside the central position via an annular bag filled with gas or liquid, and the cable moves in a direction perpendicular to the axis due to vibration, and A cable vibration damping method characterized in that vibration of a cable is attenuated and damped by colliding reaction forces of a cylinder moving through gas or liquid as the cable moves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19851690A JPH0483008A (en) | 1990-07-25 | 1990-07-25 | Damping method of cable in cable stayed bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19851690A JPH0483008A (en) | 1990-07-25 | 1990-07-25 | Damping method of cable in cable stayed bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0483008A true JPH0483008A (en) | 1992-03-17 |
Family
ID=16392440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19851690A Pending JPH0483008A (en) | 1990-07-25 | 1990-07-25 | Damping method of cable in cable stayed bridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0483008A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013062078A1 (en) * | 2011-10-26 | 2013-05-02 | 株式会社ハイレックスコーポレーション | Window regulator |
-
1990
- 1990-07-25 JP JP19851690A patent/JPH0483008A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013062078A1 (en) * | 2011-10-26 | 2013-05-02 | 株式会社ハイレックスコーポレーション | Window regulator |
| CN103917730A (en) * | 2011-10-26 | 2014-07-09 | 株式会社海莱客思 | Window regulator |
| JPWO2013062078A1 (en) * | 2011-10-26 | 2015-04-02 | 株式会社ハイレックスコーポレーション | Window regulator |
| US9255433B2 (en) | 2011-10-26 | 2016-02-09 | Hi-Lex Corporation | Window regulator |
| CN103917730B (en) * | 2011-10-26 | 2017-08-25 | 株式会社海莱客思 | Window regulator |
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