JPH03110207A - Damper device of inclined cable - Google Patents
Damper device of inclined cableInfo
- Publication number
- JPH03110207A JPH03110207A JP24712289A JP24712289A JPH03110207A JP H03110207 A JPH03110207 A JP H03110207A JP 24712289 A JP24712289 A JP 24712289A JP 24712289 A JP24712289 A JP 24712289A JP H03110207 A JPH03110207 A JP H03110207A
- Authority
- JP
- Japan
- Prior art keywords
- cable
- flanges
- stayed
- damper device
- 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.)
- Granted
Links
- 239000003190 viscoelastic substance Substances 0.000 claims abstract description 13
- 229940006076 viscoelastic substance Drugs 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 239000000565 sealant Substances 0.000 abstract 1
- 238000013016 damping Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 238000004458 analytical method 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
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
- Vibration Prevention Devices (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。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a damper device for suppressing vibrations of cable-stayed cables 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１２１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, mechanisms or methods for suppressing cable-stayed bridge cable vibration include those that suppress vibration by connecting cable-stayed cables 3 with rows 121 and interference between cables 3 (see Figure 8), and oil dampers. 22 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, with the method of connecting the cables 3 with the rope 21, a sufficient vibration damping effect cannot be expected;
1 is aesthetically problematic.
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。In addition, when using the oil damper 22, since the damping effect is unidirectional, it is necessary to install two or more oil dampers 22 as shown in FIG. , which poses a major aesthetic problem.
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、ウェークギヤロ
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 prevents cable-stayed cables of cable-stayed bridges from causing problems such as wake gear ropping, rain vibration, vortex excitation vibration, and vibration due to live loads, without impairing the aesthetic appearance of cable-stayed bridges. The purpose is to effectively suppress all vibrations in the
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, an overview of the present invention will be explained using reference numerals in 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の定着端部に設けら
れ、桁２または主塔１側に固定され、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 installed at the fixed end of a cable-stayed cable 3 that connects the main tower 1 and girder 2 of a cable-stayed bridge as shown in FIG. A cylindrical body 5 with an inward flange 6 into which the tensioned cable 3 is inserted, an outward flange 8 provided on the cable 3 side, and a viscoelastic material filled in the gap between the inward flange 6 and the outward flange 8. It consists of 9.
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 cylindrical body 5 may be an extension of the casing pipe 4 for fixing and protecting the diagonal 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。One or more inward flanges 6 and outward flanges 8 are arranged at right angles (or approximately at right angles) to the cable-stayed cable 3, respectively.
The flange surfaces are arranged alternately and overlap each other at predetermined intervals.
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 flange 8 is usually connected to the protective tube 3 of the cable-stayed cable 3.
Although it is possible to attach it directly to the protection tube 3a or the like, for example, it is possible to form a flange 8 on the outer periphery of the half-split pipe 7 and attach the half-split pipes 7 to the outer periphery of the cable-stayed cable 3. This 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 depending on the distance between the flanges 6.8 and the area of the flanges 6.8,
It exhibits a vibration damping effect in a plane 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 thermal energy of the viscoelastic material 9 through the relative movement of the plates (inward flange 6 and outward flange 8) sandwiching the viscoelastic material 9, and the vibration energy is can be suppressed.
以下に、本ダンパー装置を長さｊ２＝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, we will discuss the vibration analysis results when this damper device is attached to a cable-stayed cable with length j2 = 100 m (see Fig. 6).
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 damper damping coefficient C 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 ＝ １１０ ｋ
ｇｓ／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＝０．０
５、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、かなりの制振効果をもっ
ていることがわかる。It is generally said that the vibration of a cable-stayed cable appears in the first to fourth modes, and from the figure, the damping coefficient C that most effectively affects these modes is found to be c = 110 k.
It will be about gs/cm. At this time, the logarithmic decay rate δ is approximately 0
．． 2, and the method of tying the cable with a rope is δ = 0.0
5. How to install the oil damper is δ=0.1~0
．． Considering that it is 15, it can be seen that it has a considerable vibration damping effect.
なお、減衰係数ｃ ＝ １１０ ｋｇｓ／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＝１４０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。In addition, when the damping coefficient c = 110 kgs/cm, the diameter of the casing pipe is φ = 300, and the diameter of the cable protection tube is φ = 140, then only two plates are required to sandwich the viscoelastic substance, making it extremely 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。Figure 5 shows the damper device A of the present invention installed at the side end of the cable-stayed cable girder 2 in the cable-stayed bridge of Figure 4, and Figures 1 to 3 show its details. An outward flange 8 is provided on the outer periphery of the tensioned cable 3, and a cylindrical body 5 having an inward flange 6 is connected to the casing pipe 4 with bolts 10 on the outer periphery, and the 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, an outward flange 8 is formed on the outer surface of the half-split pipe 7, and this half-split pipe 7 is connected to the cable-stayed cable 3.
A pair of protective tubes 3a are attached to the outer periphery of the protective tube 3a 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。Note that a sealing material 14 is attached to the outermost flange of the inward flange 6 and the outward flange 8, and a viscoelastic substance 9 is enclosed therein.
■ 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。(2) The device of the present invention can be housed in a casing pipe or a pipe having approximately the same diameter as the casing pipe, and there is no risk of spoiling the aesthetic 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。■ Has a 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。■ It is also very compact and can be stored inside a normal casing pipe.
■ 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 dividing this device into two, maintenance such as replacement can be easily performed.
■ 粘弾性物質を挾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。■ By changing the area of the flanges that sandwich the viscoelastic material, it is possible to design a damper with any desired damping effect.
■ 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。■ Because it is compact, it can also 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 inexpensive.
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−１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、３
ａ・・・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 １
３・・・ボルト、１４・・・シール材
第
図
第
図
第
図
第
図
第
図
第
０
図Fig. 1 is a vertical sectional view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along line I-1 in Fig. 1, Fig. 3 is an enlarged view of the main part of Fig. 1, and Fig. 4 is a damper of the invention. 5 is a vertical sectional view showing the structure of a cable fixing section to which the damper device of the present invention is installed, and FIG. 6 is an analytical model diagram of the damper device of the present invention. , Fig. 7 is a graph showing the analysis results, Fig. 8 is a schematic diagram of a conventional example of connecting cables with rope, Fig. 9 is a schematic diagram of a conventional example using an oil damper, and Fig. 10 is a diagram of a conventional example using an oil damper. FIG. 3 is a schematic diagram showing a planar arrangement. A... Damper device, 1... Main tower, 2... Girder, 3... Cable-stayed cable, 3
a...Protection tube, 4...Casing pipe, 5...
Cylindrical body, 6... Inward flange, 7... Pipe, 8.
...Outward flange, 9...Viscoelastic material, 10...
Bolt, 11...Buffer material, 12...Rubber cover 1
3...Bolt, 14...Sealing material Fig. Fig. Fig. Fig. 0 Fig. 0
Claims (1)
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) At the fixed end of the cable-stayed cable connecting the main tower and girder of a cable-stayed bridge, a cylindrical body fixed to the girder or main tower side and into which the cable-stayed cable end is inserted; one or more inward flanges provided on the inner surface at right angles or substantially right angles to the cable-stayed cable so as to surround the cable-stayed cable; It is characterized by comprising one or more outward flanges arranged alternately with inward flanges at predetermined intervals, and a viscoelastic substance filled in the gap between the inward flanges and the outward flanges. A damper device for cable-stayed cables.
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 true JPH03110207A (en) | 1991-05-10 |
| JPH0639763B2 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) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05148816A (en) * | 1991-09-27 | 1993-06-15 | Nkk Corp | Cable damping device |
| JP2011133938A (en) * | 2009-12-22 | 2011-07-07 | Sinfonia Technology Co Ltd | Apparatus and method for identifying vibration characteristic of conveyance device, and conveyance system using the same |
| CN109778701A (en) * | 2019-01-28 | 2019-05-21 | 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
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05148816A (en) * | 1991-09-27 | 1993-06-15 | Nkk Corp | Cable damping device |
| JP2011133938A (en) * | 2009-12-22 | 2011-07-07 | Sinfonia Technology Co Ltd | Apparatus and method for identifying vibration characteristic of conveyance device, and conveyance system using the same |
| CN109778701A (en) * | 2019-01-28 | 2019-05-21 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0639763B2 (en) | 1994-05-25 |
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