JPH0639763B2 - Cable stay cable damper device - Google Patents
Cable stay cable damper deviceInfo
- Publication number
- JPH0639763B2 JPH0639763B2 JP24712289A JP24712289A JPH0639763B2 JP H0639763 B2 JPH0639763 B2 JP H0639763B2 JP 24712289 A JP24712289 A JP 24712289A JP 24712289 A JP24712289 A JP 24712289A JP H0639763 B2 JPH0639763 B2 JP H0639763B2
- Authority
- JP
- Japan
- Prior art keywords
- cable
- stayed
- damper device
- flange
- vibration
- 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
- 229940006076 viscoelastic substance Drugs 0.000 claims description 10
- 239000003190 viscoelastic substance Substances 0.000 claims description 10
- 238000013016 damping Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
- Vibration Prevention Devices (AREA)
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斜張ケーブルの振動を抑制する
ためのダンパー装置に関するものである。TECHNICAL FIELD The present invention relates to a damper device for suppressing vibration of a cable-stayed cable in a cable-stayed bridge.
従来、斜張橋のケーブルの振動を抑制する機構または方
法としては、斜張ケーブル３どうしをロープ２１で結び
ケーブル３相互の干渉により、振動を抑制するもの（第
８図参照）や、オイルダンパー２２をケーブル３の定着
端部に取り付けたもの（第９図および第１０図参照）な
どがある。Conventionally, as a mechanism or method for suppressing the vibration of the cable of the cable-stayed bridge, a cable 21 is used to connect the cable-stayed cables 3 with a rope 21 to suppress the vibration by mutual interference of the cables 3 (see FIG. 8) and an oil damper. For example, the cable 22 is attached to the fixing end of the cable 3 (see FIGS. 9 and 10).
しかし、ロープ２１でケーブル３相互を結び付ける方法
では、十分な振動減衰効果は期待できず、またロープ２
１が美観上問題となる。However, the method of connecting the cables 3 to each other with the rope 21 cannot be expected to have a sufficient vibration damping effect.
1 is an aesthetic problem.
また、オイルダンパー２２を用いる場合、減衰効果は一
方向であるため、第１０図に示すように２以上のオイル
ダンパー２２を設置する必要がある他、オイルダンパー
２２をケーブル３外に設置するため、美観上大きな問題
となる。Further, when the oil damper 22 is used, since the damping effect is unidirectional, it is necessary to install two or more oil dampers 22 as shown in FIG. 10 and also to install the oil damper 22 outside the cable 3. , Is a big problem in terms of aesthetics.
本発明は上述のような従来技術における問題点の解決を
図り、斜張橋の美観を損なうことなく、ウェークギャロ
ッピング、レインバイブレーション、渦励振、活荷重に
よる振動など、斜張橋の斜張ケーブルにおけるあらゆる
振動を効果的に抑制することを目的としている。The present invention aims to solve the problems in the prior art as described above, and in the cable-stayed cable of the cable-stayed bridge, such as wake galloping, rain vibration, vortex excitation, and vibration due to live load without impairing the aesthetics of the cable-stayed bridge. The purpose is to effectively suppress all vibrations.
以下、本発明の概要を実施例に対応する図面の符号を用
いて説明する。Hereinafter, the outline of the present invention will be described using the reference numerals of the drawings corresponding to the embodiments.
本発明のダンパー装置は第４図に示すような斜張橋の主
塔１と桁２とを結ぶ斜張ケーブル３の定着端部におい
て、桁２または主塔１側に固定され、前記斜張ケーブル
３が挿入される内向きフランジ６付きの筒体５と、ケー
ブル３側に設けられる外向きフランジ８、および内向き
フランジ６と外向きフランジ８の間の間隙に充填される
粘弾性物質９とからなる。The damper device of the present invention is fixed to the girder 2 or the main tower 1 side at the fixing end portion of the cable-stayed cable 3 connecting the main tower 1 and the girder 2 of the cable-stayed bridge as shown in FIG. A cylindrical body 5 with an inward flange 6 into which the cable 3 is inserted, an outward flange 8 provided on the cable 3 side, and a viscoelastic substance 9 filled in a gap between the inward flange 6 and the outward flange 8. Consists of.
筒体５は斜張ケーブル３の定着および保護用のケーシン
グパイプ４を延長したものでもよく、またケーシングパ
イプ４と別個に設けたものでもよい。The tubular body 5 may be an extension of a casing pipe 4 for fixing and protecting the cable-stayed cable 3, or may be provided separately from the casing pipe 4.
内向きフランジ６と外向きフランジ８はそれぞれ斜張ケ
ーブル３と直角（またはほぼ直角）に１または２以上、
交互に配置され、フランジ面どうしが所定間隔をおいて
重なり合っている。The inward flange 6 and the outward flange 8 are 1 or 2 or more at right angles (or almost right angles) to the cable-stayed cable 3, respectively.
The flange surfaces are alternately arranged, and the flange surfaces overlap each other with a predetermined distance.
外向きフランジ８は、通常、斜張ケーブル３の保護管３
ａの外周に装着され、保護管３ａなどに直接取り付ける
ことも可能であるが、例えば、半割りのパイプ７の外周
にフランジ８を形成し、半割りパイプ７どうしを斜張ケ
ーブル３外周に取り付ける形式とすれば、装着が容易で
ある。The outward-facing flange 8 is usually the protection tube 3 for the cable-stayed cable 3.
Although it is possible to mount it on the outer periphery of a and directly attach it to the protection pipe 3a or the like, for example, a flange 8 is formed on the outer periphery of the half-split pipe 7, and the half-split pipes 7 are attached to the outer periphery of the cable-stayed cable 3. The format makes it easy to install.
以上の構成において、粘弾性物質９はフランジ６，８間
の距離やフランジ６，８の面積に応じた抵抗力を示し、
斜張ケーブル３と直角な面における振動減衰効果を発揮
する。In the above configuration, the viscoelastic substance 9 exhibits a resistance force according to the distance between the flanges 6 and 8 and the area of the flanges 6 and 8,
A vibration damping effect is exerted on a surface perpendicular to the cable-stayed cable 3.
本発明のダンパー装置では斜張ケーブル３の振動エネル
ギーを粘弾性物質９を挟んだ板（内向きフランジ６およ
び外向きフランジ８）の相対運動を通して、粘弾性物質
９の熱エネルギーに変換し、振動を抑制することができ
る。In the damper device of the present invention, the vibration energy of the cable-stayed cable 3 is converted into the heat energy of the viscoelastic substance 9 through the relative motion of the plates (the inward flange 6 and the outward flange 8) sandwiching the viscoelastic substance 9 to vibrate. Can be suppressed.
以下に、本ダンパー装置を長さｌ＝１００ｍの斜張ケー
ブルに取り付けた場合（第６図参照）の振動解析結果に
ついて述べる。Below, the vibration analysis results when the present damper device is attached to a cable-stayed cable having a length of l = 100 m (see FIG. 6) will be described.
第７図はダンパーの減衰係数ｃと対数減衰率δの関係を
各振動モードごとに示したものである。FIG. 7 shows the relationship between the damping coefficient c of the damper and the logarithmic damping rate δ for each vibration mode.
斜張ケーブルの振動は一般に、１次〜４次のモードが表
れると言われており、図よりそれらのモードに最も有効
に作用する減衰係数ｃを求めると、ｃ＝１１０kgc/cm程
度になる。このときの対数減衰率δは約0.2になり、ケ
ーブルをロープで結ぶ方法がδ＝0.05、オイルダンパー
を取り付ける方法がδ＝0.1〜0.15であることを考える
と、かなり制振効果をもっていることがわかる。It is generally said that the vibration of the cable-stayed cable has first to fourth order modes, and the damping coefficient c that most effectively acts on those modes is found from the figure to be about c = 110 kgc / cm. The logarithmic decrement δ at this time is about 0.2. Considering that the method of tying the cable with a rope is δ = 0.05, and the method of attaching the oil damper is δ = 0.1 to 0.15, it can be said that there is a considerable damping effect. Recognize.
なお、減衰係数ｃ＝１１０kgc/cmとする場合、ケーシン
グパイプの径φ＝３００、ケーブル保護管の径φ＝１４
０とすると、粘弾性物質を挟む板が２枚でよく、非常に
コンパクトになる。When the damping coefficient c is 110 kgc / cm, the diameter of the casing pipe is φ = 300 and the diameter of the cable protection pipe is φ = 14.
When set to 0, only two plates sandwiching the viscoelastic substance are required, which makes the device very compact.
次に図示した実施例について説明する。 Next, the illustrated embodiment will be described.
第５図は第４図の斜張橋における斜張ケーブル桁２側端
部に本発明のダンパー装置Ａを設置した状態を、第１図
〜第３図はその詳細を示したもので、斜張ケーブル３の
外周に外向きフランジ８を設け、その外周において内向
きフランジ６を有する筒体５をケーシングパイプ４にボ
ルト１０で接続するとともに、間隙には粘弾性物質９を
充填し、ダンパー装置Ａを構成している。図中、１１は
緩衝材、１２はダンパー装置Ａの上部を保護するための
ゴムカバーである。FIG. 5 shows a state in which the damper device A of the present invention is installed at the end portion of the cable-stayed cable girder 2 side of the cable-stayed bridge of FIG. 4, and FIGS. 1 to 3 show the details thereof. An outward flange 8 is provided on the outer circumference of the tension cable 3, a cylindrical body 5 having an inward flange 6 on the outer circumference is connected to the casing pipe 4 by a bolt 10, and a gap is filled with a viscoelastic substance 9 to form a damper device. It constitutes A. In the figure, 11 is a cushioning material, and 12 is a rubber cover for protecting the upper part of the damper device A.
本実施例では外向きフランジ８を半割りパイプ７の外面
に形成しており、この半割りのパイプ７を斜張ケーブル
３の保護管３ａの外周に一対装着し、ボルト１３で固定
している。In this embodiment, the outward flange 8 is formed on the outer surface of the half-split pipe 7. A pair of the half-split pipes 7 are attached to the outer circumference of the protection pipe 3a of the cable-stayed cable 3 and fixed with bolts 13. .
また、本実施例では内向きフランジ６が３枚、外向きフ
ランジ８が２枚である。Further, in this embodiment, there are three inward flanges 6 and two outward flanges 8.
なお、内向きフランジ６および外向きフランジ８のう
ち、最外縁に位置するフランジにはシール材１４を取り
付け、粘弾性物質９を封入している。A sealing material 14 is attached to the flange located at the outermost edge of the inward flange 6 and the outward flange 8 to enclose the viscoelastic substance 9.
〔発明の効果〕 本発明の装置はケーシングパイプ内またはケーシング
パイプと略同径のパイプ内に納めることができ、何ら美
観を損なうおそれがない。[Effects of the Invention] The device of the present invention can be stored in a casing pipe or a pipe having a diameter substantially the same as that of the casing pipe, and there is no fear of impairing the appearance.
ケーブルと直角な任意の方向に対して制振効果があ
る。It has a vibration damping effect in any direction perpendicular to the cable.
また、通常のケーシングパイプ内に納めることがで
き、非常にコンパクトである。Also, it can be stored in a normal casing pipe and is very compact.
本装置を二つ割りとすることで、交換などのメンテナ
ンスが容易にできる。By splitting this device in two, maintenance such as replacement can be facilitated.
粘弾性物質を挟むフランジ部分の面積を変えることに
より、任意の減衰効果を持つダンパーが設計可能であ
る。A damper having an arbitrary damping effect can be designed by changing the area of the flange portion sandwiching the viscoelastic substance.
コンパクトであるために、主塔側にも取り付けること
ができる。Since it is compact, it can be installed on the main tower side.
装置自体の疲労の問題がない。There is no problem of fatigue of the device itself.
安価である。It is cheap.
第１図は本発明の実施例を示す鉛直断面図、第２図は第
１図のＩ−Ｉ断面図、第３図は第１図の要部拡大図、第
４図は本発明のダンパーが設置される斜張橋の一例を示
す全体図、第５図は本発明のダンパー装置を取り付けた
ケーブル定着部の構造を示す鉛直断面図、第６図は本発
明のダンパー装置の解析モデル図、第７図は解析結果を
示すグラフ、第８図はケーブルどうしをロープで結ぶ従
来例の概要図、第９図はオイルダンパーを用いた従来例
を示す概要図、第１０図はオイルダンパーの平面配置を
示す概要図である。 Ａ…ダンパー装置、 １…主塔、２…桁、３…斜張ケーブル、３ａ…保護管、
４…ケーシングパイプ、５…筒体、６…内向きフラン
ジ、７…パイプ、８…外向きフランジ、９…粘弾性物
質、１０…ボルト、１１…緩衝材、１２…ゴムカバー、
１３…ボルト、１４…シール材1 is a vertical sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line I--I of FIG. 1, FIG. 3 is an enlarged view of a main part of FIG. 1, and FIG. 4 is a damper of the present invention. Fig. 5 is an overall view showing an example of a cable-stayed bridge in which is installed, Fig. 5 is a vertical cross-sectional view showing the structure of the cable fixing section to which the damper device of the present invention is attached, and Fig. 6 is an analysis model diagram of the damper device of the present invention. , FIG. 7 is a graph showing the analysis results, FIG. 8 is a schematic view of a conventional example in which cables are connected with a rope, FIG. 9 is a schematic view of a conventional example using an oil damper, and FIG. It is a schematic diagram showing a plane arrangement. A ... Damper device, 1 ... Main tower, 2 ... Girder, 3 ... Cable-stayed cable, 3a ... Protective tube,
4 ... Casing pipe, 5 ... Cylindrical body, 6 ... Inward flange, 7 ... Pipe, 8 ... Outward flange, 9 ... Viscoelastic substance, 10 ... Bolt, 11 ... Buffer material, 12 ... Rubber cover,
13 ... Bolt, 14 ... Sealing material
Claims (1)
定着端部において、桁または主塔側に固定され、前記斜
張ケーブル端部が挿入される筒体と、該筒体の内面に前
記斜張ケーブルを取り巻くように斜張ケーブルと直角ま
たはほぼ直角に設けられた１または２以上の内向きフラ
ンジと、前記斜張ケーブルの外周に斜張ケーブルと直角
またはほぼ直角に、前記内向きフランジと交互に所定間
隔をおいて配置された１または２以上の外向きフランジ
と、前記内向きフランジおよび前記外向きフランジ間の
間隙に充填された粘弾性物質とからなることを特徴とす
る斜張ケーブルのダンパー装置。1. A tubular body fixed to a girder or a main tower at a fixing end of a cable-stayed cable connecting a main tower and a girder of a cable-stayed bridge, and the end of the cable-stayed cable is inserted, and the tube. One or more inward flanges provided on the inner surface of the body so as to surround the cable-stayed cable at right angles or nearly at right angles to the cable-stayed cable, and at the outer periphery of the cable-stayed cable at a right angle or almost right-angle to the cable-stayed cable. , One or more outward flanges arranged alternately with the inward flange at a predetermined interval, and a viscoelastic substance filled in a gap between the inward flange and the outward flange. A characteristic cable-stayed cable damper device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24712289A JPH0639763B2 (en) | 1989-09-22 | 1989-09-22 | Cable stay cable damper device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24712289A JPH0639763B2 (en) | 1989-09-22 | 1989-09-22 | Cable stay cable damper device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03110207A JPH03110207A (en) | 1991-05-10 |
| JPH0639763B2 true JPH0639763B2 (en) | 1994-05-25 |
Family
ID=17158763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24712289A Expired - Lifetime JPH0639763B2 (en) | 1989-09-22 | 1989-09-22 | Cable stay cable damper device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0639763B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05148816A (en) * | 1991-09-27 | 1993-06-15 | Nkk Corp | Cable damping device |
| JP5458278B2 (en) * | 2009-12-22 | 2014-04-02 | シンフォニアテクノロジー株式会社 | Vibration characteristic identification device for transfer device, vibration characteristic identification method for transfer device, and transfer system using them |
| CN109778701B (en) * | 2019-01-28 | 2020-08-18 | 秭归县屈乡交通建设开发有限公司 | A kind of buckle anchor cable force sensing and temperature linear control compensation device and construction method |
| CN110158449A (en) * | 2019-06-03 | 2019-08-23 | 中国铁路设计集团有限公司 | A kind of beams of concrete cable-stayed bridge anchor tie plate structure |
-
1989
- 1989-09-22 JP JP24712289A patent/JPH0639763B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03110207A (en) | 1991-05-10 |
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