JPH06272212A - Damping device - Google Patents
Damping deviceInfo
- Publication number
- JPH06272212A JPH06272212A JP8523593A JP8523593A JPH06272212A JP H06272212 A JPH06272212 A JP H06272212A JP 8523593 A JP8523593 A JP 8523593A JP 8523593 A JP8523593 A JP 8523593A JP H06272212 A JPH06272212 A JP H06272212A
- Authority
- JP
- Japan
- Prior art keywords
- cable
- vibration
- bridge girder
- main tower
- damping
- 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
Landscapes
- Bridges Or Land Bridges (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、吊り橋の橋桁に生じる
振動を減衰するために用いられる制振装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device used to damp vibrations generated in a bridge girder of a suspension bridge.
【０００２】[0002]
【従来の技術】従来、吊り橋の橋桁は、主塔から垂設さ
れたケーブルにより直接釣支されていた。2. Description of the Related Art Conventionally, suspension girders have been directly supported by cables suspended from a main tower.
【０００３】[0003]
【発明が解決しようとする課題】吊り橋の橋桁には、風
や該橋を通行する車両等により、しばしば上下方向乃至
左右方向乃至ねじれ方向の振動が発生する。しかし、従
来の橋桁は、主塔から垂設されたケーブルにより直接釣
支されていたので、該振動を減衰する手立てが全くない
という未解決の問題を有しており、又、橋桁が振動する
ことによりケーブルに無理な張力が生じ、結果的に該ケ
ーブルの疲労を促進するという不都合を有していた。The bridge girder of a suspension bridge is often vibrated in the vertical direction, the horizontal direction, or the twisting direction due to wind, vehicles passing through the bridge, or the like. However, since the conventional bridge girder is directly supported by the cable hung from the main tower, there is an unsolved problem that there is no way to damp the vibration, and the bridge girder vibrates. As a result, excessive tension is generated in the cable, resulting in the inconvenience of promoting fatigue of the cable.
【０００４】本発明は、上記事情に鑑み、橋桁の振動を
好適に減衰することが出来ると共に、ケーブルの疲労を
防止することが出来る制振装置を提供することを目的と
している。In view of the above circumstances, it is an object of the present invention to provide a vibration damping device capable of suitably damping the vibration of the bridge girder and preventing the fatigue of the cable.
【課題を解決するための手段】本発明は、塔状に立設さ
れた主塔部（２）及び、該主塔部（２）からケーブル部
材（５、１２）により釣支する形で設けられた橋桁部
（３、１１）を有する橋梁（１００）において、前記ケ
ーブル部材（５、１２）と前記橋桁部（３、１１）との
間に、弾性接続手段（１３）を、該ケーブル部材（５、
１２）と該橋桁部（３、１１）を弾性的に接続する形で
設け、前記ケーブル部材（５、１２）と前記橋桁部
（３、１１）との間に、前記ケーブル部材（５、１２）
に対する該橋桁部（３、１１）の振動を減衰し得る減衰
手段（１５）を、前記弾性接続手段（１３）に対して並
列に設けて構成される。また、本発明は、塔状に立設さ
れた主塔部（２、２１）及び、該主塔部（２、２１）か
らケーブル部材（５、１２）により釣支する形で設けら
れた橋桁部（３）を有する橋梁（１００）において、前
記主塔部（２、２１）と前記ケーブル部材（５、１２）
との間に、弾性接続手段（１３）を、該主塔部（２、２
１）と該ケーブル部材（５、１２）を弾性的に接続する
形で設け、前記主塔部（２、２１）と前記ケーブル部材
（５、１２）との間に、前記主塔部（２、２１）に対す
る該ケーブル部材（５、１２）の振動を減衰し得る減衰
手段（１５）を、前記弾性接続手段（１３）に対して並
列に設けて構成される。更に本発明は、塔状に立設され
た主塔部（２）及び、該主塔部（２）からケーブル部材
（５、１２、２２）により釣支する形で設けられた橋桁
部（３）を有する橋梁（１００）において、前記ケーブ
ル部材（５）をケーブル上部（５ａ、１２）とケーブル
下部（５ｂ、２２）に分離し、前記ケーブル上部（５
ａ、１２）と前記ケーブル下部（５ｂ、２２）との間
に、該ケーブル上部（５ａ、１２）と該ケーブル下部
（５ｂ、２２）を弾性的に接続し得る弾性接続手段（１
３）を設け、前記ケーブル上部（５ａ、１２）と前記ケ
ーブル下部（５ｂ、２２）との間に、該ケーブル上部
（５ａ、１２）とケーブル下部（５ｂ、２２）間の振動
を減衰し得る減衰手段（１５）を、前記弾性接続手段
（１３）に対して並列に設けて構成される。なお、
（ ）内の番号等は、図面における対応する要素を示
す、便宜的なものであり、従って、本記述は図面上の記
載に限定拘束されるものではない。以下の作用の欄につ
いても同様である。According to the present invention, there is provided a main tower portion (2) erected in a tower shape, and a fishing rod supported by the cable members (5, 12) from the main tower portion (2). In a bridge (100) having an extended bridge girder (3, 11), an elastic connecting means (13) is provided between the cable member (5, 12) and the bridge girder (3, 11). (5,
12) and the bridge girder portion (3, 11) are elastically connected to each other, and the cable member (5, 12) is provided between the cable member (5, 12) and the bridge girder portion (3, 11). )
A damping means (15) capable of damping the vibration of the bridge girder portion (3, 11) with respect to the above is provided in parallel with the elastic connecting means (13). Further, the present invention provides a main tower portion (2, 21) erected in a tower shape, and a bridge girder provided in a form supported by a cable member (5, 12) from the main tower portion (2, 21). In a bridge (100) having a section (3), the main tower section (2, 21) and the cable member (5, 12)
An elastic connecting means (13) is provided between the main tower section (2, 2).
1) and the cable member (5, 12) are elastically connected to each other, and the main tower portion (2, 21) is provided between the main tower portion (2, 21) and the cable member (5, 12). , 21) for damping the vibration of the cable member (5, 12) to the elastic connecting means (13) in parallel. Further, according to the present invention, a main tower part (2) erected in a tower shape and a bridge girder part (3) provided in a form of being supported by a cable member (5, 12, 22) from the main tower part (2). ), The cable member (5) is separated into a cable upper part (5a, 12) and a cable lower part (5b, 22), and the cable upper part (5a, 12) is separated.
a, 12) and the cable lower part (5b, 22) between the cable upper part (5a, 12) and the cable lower part (5b, 22) can be elastically connected (1).
3) may be provided to dampen vibration between the cable upper part (5a, 12) and the cable lower part (5b, 22) between the cable upper part (5a, 12) and the cable lower part (5b, 22). A damping means (15) is provided in parallel with the elastic connecting means (13). In addition,
Numbers in parentheses are for convenience of reference to corresponding elements in the drawings, and thus the present description is not limited to the description in the drawings. The same applies to the following action columns.
【０００５】[0005]
【作用】上記した構成により、本発明は、弾性接続手段
（１３）により、ケーブル部材（５、１２、２２）が主
塔部（２）と橋桁部（３）の間に弾性的に張設されると
共にケーブル部材（５、１２、２２）に設けられた減衰
手段（１５）が橋桁部（３）の振動を減衰し得るように
作用する。According to the present invention, the cable member (5, 12, 22) is elastically stretched between the main tower portion (2) and the bridge girder portion (3) by the elastic connecting means (13). In addition, the damping means (15) provided on the cable members (5, 12, 22) acts so as to damp the vibration of the bridge girder (3).
【０００６】[0006]
【実施例】以下、本発明の実施例を図面に基づき説明す
る。図１は、本発明の制振装置を適用した吊り橋を示す
図である。図２は、図１の制振装置を吊り橋の主塔とケ
ーブルの間に設けた場合を示す図である。図３は、図１
の制振装置を吊り橋のケーブルに設けた場合を示す図で
ある。地盤１には、図１に示すように、吊り橋１００の
主塔２が塔状に立設されており、主塔２の中腹には、橋
桁３を接合し得る桁接合部２ａが設けられており、桁接
合部２ａには、橋桁３が水平に接合されている。また、
主塔２の上端部２ｂには、ケーブル５の一端が接続され
ており、該ケーブル５は、制振装置１０を介して橋桁３
を釣支している。また、主塔２の上部と、橋桁３との間
には、複数本のケーブル６、７が、前記橋桁３を釣支す
る形で設けられており、ケーブル５、６、７は、ケーブ
ル５が最も振幅の大きな振動を生じ易い橋桁３中央部に
接続する形で且つ互いに平行に設けられている。制振装
置１０は、橋桁３に対しては桁接続部１１を介して、ケ
ーブル５に対してはケーブル接続部１２を介して接続し
ており、また、制振装置１０は、桁接続部１１とケーブ
ル接続部１２との間隔Ｌ１を拡大縮小し得るようにそれ
ら桁接続部１１とケーブル接続部１２を弾性的に接続す
るバネ１３を有している。また、桁接続部１１とケーブ
ル接続部１２との間には、減衰特性を自在に変化させ得
る減衰可変ダンパ１５がバネ１３の内部に同軸状に設け
られており、減衰可変ダンパ１５は、橋桁３に設けられ
たダンパ制御装置１６に接続している。また、橋桁３に
は、橋桁３の振動を検知し得る振動センサ１７が設けら
れており、振動センサ１７は、ダンパ制御装置１６に接
続している。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a suspension bridge to which the vibration damping device of the present invention is applied. FIG. 2 is a diagram showing a case where the vibration damping device of FIG. 1 is provided between a main tower of a suspension bridge and a cable. FIG. 3 shows FIG.
It is a figure which shows the case where the damping device of is provided in the cable of a suspension bridge. As shown in FIG. 1, a main tower 2 of a suspension bridge 100 is erected on the ground 1 in a tower shape, and a girder joint 2a to which a bridge girder 3 can be joined is provided in the middle of the main tower 2. The bridge girder 3 is horizontally joined to the girder joint 2a. Also,
One end of a cable 5 is connected to the upper end portion 2b of the main tower 2, and the cable 5 is connected to the bridge girder 3 via a vibration damping device 10.
Is fishing. A plurality of cables 6 and 7 are provided between the upper part of the main tower 2 and the bridge girder 3 so as to support the bridge girder 3, and the cables 5, 6 and 7 are the cables 5 and 7. Are connected to the central portion of the bridge girder 3 in which vibration with the largest amplitude is likely to occur and are provided in parallel with each other. The vibration damping device 10 is connected to the bridge girder 3 via the girder connection portion 11 and to the cable 5 via the cable connection portion 12, and the vibration damping device 10 is connected to the girder connection portion 11 The spring 13 elastically connects the girder connection portion 11 and the cable connection portion 12 so that the distance L1 between the cable connection portion 12 and the cable connection portion 12 can be enlarged or reduced. In addition, between the girder connection portion 11 and the cable connection portion 12, a damping variable damper 15 capable of freely changing the damping characteristic is provided coaxially inside the spring 13, and the damping variable damper 15 is a bridge girder. 3 is connected to the damper control device 16 provided in the device 3. Further, the bridge girder 3 is provided with a vibration sensor 17 capable of detecting the vibration of the bridge girder 3, and the vibration sensor 17 is connected to the damper control device 16.
【０００７】制振装置１０等は、以上のような構成を有
するので、通常、ケーブル５と橋桁３とは、図１に示す
ように、バネ１３により、桁接続部１１とケーブル接続
部１２との間を所定の間隔Ｌ１に保持するように接続さ
れている。また、桁接続部１１とケーブル接続部１２と
は、その間隔Ｌ１を拡大縮小し得る形で弾性的に接続さ
れている。よって、風や通行する車輌等により橋桁３に
振動が生じた際には、桁接続部１１が、桁接続部１１と
ケーブル接続部１２との間隔を拡大縮小する形でケーブ
ル接続部１２に対して振動し、減衰可変ダンパ１５を作
動させる。すると、減衰可変ダンパ１５は、その桁接続
部１１に、その振動を収束させるような減衰力を与える
ことが出来、これらより、橋桁３の振動を減衰させるこ
とが出来る。また、橋桁３に振動が生じると、図１に示
すように、橋桁３に設けられた振動センサ１７が、橋桁
３の振動を検知して、ダンパ制御装置１６に、振動検知
信号Ｓ１を出力する。すると、ダンパ制御装置１６は、
振動検知信号Ｓ１に基づき、橋桁３の振動の状態、従っ
てケーブル接続部１２に対する桁接続部１１の振動態様
を瞬時に認識し、減衰可変ダンパ１５に、該ダンパ１５
の減衰特性を、前記桁接続部１１の振動が大きいときに
は減衰性を高め、該振動が小さいときには減衰性を低め
る形で前記桁接続部１１の振動のエネルギを最も効果的
に吸収し得る減衰特性とするように減衰特性変更指令Ｓ
２を出力する。すると、減衰可変ダンパ１５は、減衰特
性変更指令Ｓ２に基づき、その減衰特性を変更する。よ
って、橋桁３の振動が大きいとき、即ちケーブル接続部
１２に対する桁接続部１１の振動が大きいときには、減
衰可変ダンパ１５の減衰性を高めることにより、前記桁
接続部１１の振動のエネルギーを急速に吸収して、該振
動を迅速に減衰することが出来、橋桁３の振動が小さい
とき、即ちケーブル接続部１２に対する桁接続部１１の
振動が小さいときには、減衰可変ダンパ１５の減衰性を
低めることにより、ケーブル接続部１２の振動、即ちケ
ーブル５の振動が桁接続部１１に伝わりにくくし、ケー
ブル５の振動が減衰可変ダンパ１５による減衰力の反力
として橋桁３に伝わることによりかえって橋桁３の振動
が増幅されることがないようにして、桁接続部１１の振
動エネルギーを効果的に吸収することが出来る。これに
より、橋桁３の振動を迅速に減衰することが出来る。ま
た、図１に示す振動センサ１７は、振動検知信号Ｓ１を
常時ダンパ制御装置１６に出力しているので、減衰可変
ダンパ１５は、ダンパ制御装置１６の減衰特性変更指令
Ｓ２に基づいて、その減衰特性を、時々刻々変化する桁
接続部１１の振動態様に応じて、該桁接続部１１の振動
エネルギを最も効果的に吸収し得るように時々刻々変化
させることが出来る。従って、制振装置１０によれば、
橋桁３の振動を減衰可変ダンパ１５により迅速に減衰さ
せることが出来る。またこれにより、橋桁３の振動によ
りケーブル５に無理な張力を生じさせずに済むので、ケ
ーブル５の疲労を防止出来る。Since the vibration damping device 10 and the like have the above-mentioned structure, normally, the cable 5 and the bridge girder 3 are connected to the girder connecting portion 11 and the cable connecting portion 12 by the spring 13 as shown in FIG. They are connected so as to maintain a predetermined interval L1 between them. Further, the girder connection portion 11 and the cable connection portion 12 are elastically connected to each other so that the distance L1 can be enlarged or reduced. Therefore, when the bridge girder 3 vibrates due to wind or a passing vehicle, the girder connecting portion 11 expands and contracts the gap between the girder connecting portion 11 and the cable connecting portion 12 with respect to the cable connecting portion 12. And vibrates to activate the variable damping damper 15. Then, the variable damping damper 15 can apply a damping force to the girder connection portion 11 so as to converge the vibration, and thus the vibration of the bridge girder 3 can be damped. Further, when vibration occurs in the bridge girder 3, as shown in FIG. 1, the vibration sensor 17 provided in the bridge girder 3 detects the vibration of the bridge girder 3 and outputs the vibration detection signal S1 to the damper control device 16. . Then, the damper control device 16
Based on the vibration detection signal S1, the vibration state of the bridge girder 3, that is, the vibration mode of the girder connection part 11 with respect to the cable connection part 12 is instantly recognized, and the damping variable damper 15 is provided with the damper 15.
The damping characteristic of the above is that the energy of the vibration of the girder connection portion 11 can be absorbed most effectively by increasing the damping property when the vibration of the girder connection portion 11 is large and decreasing the damping property when the vibration is small. So that the damping characteristic change command S
2 is output. Then, the damping variable damper 15 changes its damping characteristic based on the damping characteristic changing command S2. Therefore, when the vibration of the bridge girder 3 is large, that is, when the vibration of the girder connecting portion 11 with respect to the cable connecting portion 12 is large, the damping energy of the damping variable damper 15 is increased to rapidly increase the energy of the vibration of the girder connecting portion 11. The vibration can be absorbed and quickly damped, and when the vibration of the bridge girder 3 is small, that is, when the vibration of the girder connection part 11 with respect to the cable connection part 12 is small, the damping property of the damping variable damper 15 is lowered. The vibration of the cable connecting portion 12, that is, the vibration of the cable 5 is hard to be transmitted to the girder connecting portion 11, and the vibration of the cable 5 is transmitted to the bridge girder 3 as a reaction force of the damping force by the damping variable damper 15, so that the vibration of the bridge girder 3 is rather increased. Is prevented from being amplified, and the vibration energy of the girder connection portion 11 can be effectively absorbed. Thereby, the vibration of the bridge girder 3 can be quickly damped. Further, since the vibration sensor 17 shown in FIG. 1 constantly outputs the vibration detection signal S1 to the damper control device 16, the damping variable damper 15 uses the damping characteristic change command S2 of the damper control device 16 to attenuate the damping characteristic. The characteristics can be changed momentarily so that the vibration energy of the girder connection portion 11 can be absorbed most effectively according to the vibration mode of the girder connection portion 11 which changes moment by moment. Therefore, according to the vibration damping device 10,
The vibration of the bridge girder 3 can be quickly damped by the damping variable damper 15. Further, as a result, it is not necessary to generate an excessive tension on the cable 5 due to the vibration of the bridge girder 3, so that the fatigue of the cable 5 can be prevented.
【０００８】尚、上記実施例中の制振装置１０はケーブ
ル５と橋桁３の間に設けたが、図２に示すように、主塔
部上端２ｂに主塔接続部２１を設け、ケーブル５の主塔
２側の末端にケーブル接続部１２を設けて、ケーブル接
続部１２と主塔接続部２１の間に上記実施例中の制振装
置１０を設けても上記同様の効果を有することは勿論で
ある。また、図３に示すように、上記実施例中のケーブ
ル５を上部ケーブル５ａと下部ケーブル５ｂに分離し、
上部ケーブル５ａの下端にケーブル接続部１２を設け、
下部ケーブル５ｂの上端にケーブル接続部２２を設け、
上記実施例中の制振装置１０を、ケーブル接続部１２と
ケーブル接続部２２との間に設けても上記同様の効果を
有する。Although the vibration damping device 10 in the above embodiment is provided between the cable 5 and the bridge girder 3, as shown in FIG. 2, the main tower connecting portion 21 is provided at the upper end 2b of the main tower portion, and the cable 5 Even if the cable connecting portion 12 is provided at the end of the main tower 2 side of the above and the vibration damping device 10 in the above-described embodiment is provided between the cable connecting portion 12 and the main tower connecting portion 21, the same effect as described above can be obtained. Of course. Further, as shown in FIG. 3, the cable 5 in the above embodiment is separated into an upper cable 5a and a lower cable 5b,
The cable connecting portion 12 is provided at the lower end of the upper cable 5a,
The cable connecting portion 22 is provided on the upper end of the lower cable 5b,
Even if the vibration damping device 10 in the above embodiment is provided between the cable connecting portion 12 and the cable connecting portion 22, the same effect as above can be obtained.
【０００９】[0009]
【発明の効果】以上説明したように、本発明によれば、
塔状に立設された主塔２等の主塔部及び、該主塔部から
ケーブル５、ケーブル接続部１２等のケーブル部材によ
り釣支する形で設けられた橋桁３、桁接続部１１等の橋
桁部を有する吊り橋１００等の橋梁において、前記ケー
ブル部材と前記橋桁部との間に、バネ１３等の弾性接続
手段を、該ケーブル部材と該橋桁部を弾性的に接続する
形で設け、前記ケーブル部材と前記橋桁部との間に、前
記ケーブル部材に対する該橋桁部の振動を減衰し得る減
衰可変ダンパ１５等の減衰手段を、前記弾性接続手段に
対して並列に設けて構成したので、通常は、前記弾性接
続手段により、前記ケーブル部材と前記橋桁部との間を
間隔Ｌ１等の所定の間隔に保持しておくことが出来る。
また、該ケーブル部材は、前記弾性接続手段により前記
橋桁部に弾性的に接続されている。よって、風等により
前記橋桁部に振動が生じた際には、橋桁部は、前記ケー
ブル部材との間隔を拡大縮小する形で振動し、該振動
は、前記橋桁部と前記ケーブル部材との間に設けられた
前記減衰手段により減衰することが出来る。よって、前
記橋桁部に生じた振動を好適に減衰することが出来る。
またこれにより、前記ケーブル部材に前記橋桁部の振動
のために無理な張力が生じることを未然に防ぐことが出
来るので、前記ケーブル部材の疲労防止を図ることが出
来る。また、本発明は、塔状に立設された主塔２、主塔
接続部２１等の主塔部及び、該主塔部からケーブル５、
ケーブル接続部１２等のケーブル部材により釣支する形
で設けられた橋桁３等の橋桁部を有する吊り橋１００等
の橋梁において、前記主塔部と前記ケーブル部材との間
に、バネ１３等の弾性接続手段を、該主塔部と該ケーブ
ル部材を弾性的に接続する形で設け、前記主塔部と前記
ケーブル部材との間に、前記主塔部に対する該ケーブル
部材の振動を減衰し得る減衰可変ダンパ１５等の減衰手
段を、前記弾性接続手段に対して並列に設けて構成した
ので、通常は、前記弾性接続手段により、前記主塔部と
前記ケーブル部材との間を間隔Ｌ１等の所定の間隔に保
持しておくことが出来る。また、該ケーブル部材は、前
記弾性接続手段により前記主塔部に弾性的に接続されて
いる。よって、風等により前記橋桁部に振動が生じた際
には、該橋桁部を釣支している前記ケーブル部材は、前
記主塔部との間隔を拡大縮小する形で振動し、該振動
は、前記主塔部と前記ケーブル部材との間に設けられた
前記減衰手段により減衰することが出来る。よって、前
記橋桁部に生じた振動を好適に減衰することが出来る。
またこれにより、前記ケーブル部材に前記橋桁部の振動
のために無理な張力が生じることを未然に防ぐことが出
来るので、前記橋桁部の疲労防止を図ることが出来る。
更に本発明は、塔状に立設された主塔２等の主塔部及
び、該主塔部からケーブル５、ケーブル接続部１２、２
２等のケーブル部材により釣支する形で設けられた橋桁
３等の橋桁部を有する吊り橋１００等の橋梁において、
前記ケーブル部材を上部ケーブル５ａ、ケーブル接続部
１２等のケーブル上部と下部ケーブル５ｂ、ケーブル接
続部２２等のケーブル下部に分離し、前記ケーブル上部
と前記ケーブル下部との間に、該ケーブル上部と該ケー
ブル下部を弾性的に接続し得るバネ１３等の弾性接続手
段を設け、前記ケーブル上部と前記ケーブル下部との間
に、該ケーブル上部とケーブル下部間の振動を減衰し得
る減衰可変ダンパ１５等の減衰手段を、前記弾性接続手
段に対して並列に設けて構成したので、通常は、前記弾
性接続手段により、前記ケーブル上部と前記ケーブル下
部の間を間隔Ｌ１等の所定の間隔に保持しておくことが
出来る。また、該ケーブル上部及びケーブル下部は、前
記弾性接続手段により弾性的に接続されている。よっ
て、風等により前記橋桁部に振動が生じた際には、橋桁
部は、前記ケーブル上部とケーブル下部の間隔を拡大縮
小させる形で振動し、該振動は、前記ケーブル上部とケ
ーブル下部との間に設けられた前記減衰手段により減衰
することが出来る。よって、前記橋桁部に生じた振動を
好適に減衰することが出来る。また、これにより、前記
ケーブル部材に前記橋桁部の振動のために無理な張力が
生じることを未然に防ぐことが出来るので、前記ケーブ
ル部材の疲労防止を図ることが出来る。As described above, according to the present invention,
A main tower portion such as a main tower 2 erected in a tower shape, and a bridge girder 3, a girder connection portion 11 and the like provided by being supported by a cable member such as a cable 5 and a cable connecting portion 12 from the main tower portion. In a bridge such as a suspension bridge 100 having a bridge girder section, an elastic connecting means such as a spring 13 is provided between the cable member and the bridge girder section in a form that elastically connects the cable member and the bridge girder section, Since the damping means such as the damping variable damper 15 capable of damping the vibration of the bridge girder portion with respect to the cable member is provided between the cable member and the bridge girder portion in parallel with the elastic connecting means, Normally, the elastic connecting means can hold the cable member and the bridge girder portion at a predetermined interval such as the interval L1.
Further, the cable member is elastically connected to the bridge girder portion by the elastic connecting means. Therefore, when vibration occurs in the bridge girder portion due to wind or the like, the bridge girder portion vibrates in a form of enlarging or reducing the distance from the cable member, and the vibration is generated between the bridge girder portion and the cable member. It can be attenuated by the attenuating means provided in the. Therefore, the vibration generated in the bridge girder portion can be appropriately damped.
Further, as a result, it is possible to prevent unreasonable tension from being generated in the cable member due to the vibration of the bridge girder, so that fatigue of the cable member can be prevented. In addition, the present invention provides a main tower 2 such as a tower that is erected in a tower shape, a main tower connecting portion 21 and the like, and a cable 5 from the main tower.
In a bridge such as a suspension bridge 100 having a bridge girder portion such as a bridge girder 3 provided in a form of being supported by a cable member such as a cable connecting portion 12, an elasticity such as a spring 13 is provided between the main tower portion and the cable member. A damping means that is provided to elastically connect the main tower portion and the cable member, and that can dampen the vibration of the cable member with respect to the main tower portion between the main tower portion and the cable member. Since the damping means such as the variable damper 15 is provided in parallel with the elastic connecting means, the elastic connecting means normally provides a predetermined distance L1 or the like between the main tower portion and the cable member. Can be kept at intervals of. Further, the cable member is elastically connected to the main tower portion by the elastic connecting means. Therefore, when vibration occurs in the bridge girder portion due to wind or the like, the cable member that supports the bridge girder portion vibrates in a form of enlarging or reducing the distance from the main tower portion, and the vibration is Attenuating can be performed by the attenuating means provided between the main tower section and the cable member. Therefore, the vibration generated in the bridge girder portion can be appropriately damped.
Further, by this, it is possible to prevent the cable member from being unduly tensioned due to the vibration of the bridge girder portion, so that the fatigue of the bridge girder portion can be prevented.
Furthermore, the present invention is directed to a main tower portion such as a main tower 2 erected in a tower shape, and a cable 5 and a cable connecting portion 12, 2 from the main tower portion.
In a bridge such as a suspension bridge 100 having a bridge girder portion such as a bridge girder 3 provided in a form of being supported by a cable member such as 2,
The cable member is separated into an upper cable 5a, an upper cable portion such as the cable connecting portion 12 and a lower cable portion such as a lower cable 5b and a cable connecting portion 22, and the upper cable portion and the lower cable portion are provided between the upper cable portion and the lower cable portion. An elastic connecting means such as a spring 13 for elastically connecting the cable lower part is provided, and a damping variable damper 15 or the like for damping the vibration between the cable upper part and the cable lower part is provided between the cable upper part and the cable lower part. Since the damping means is provided in parallel with the elastic connecting means, normally, the elastic connecting means keeps the upper portion of the cable and the lower portion of the cable at a predetermined distance such as the distance L1. You can Further, the cable upper part and the cable lower part are elastically connected by the elastic connecting means. Therefore, when vibration occurs in the bridge girder portion due to wind or the like, the bridge girder portion vibrates in a form of enlarging or reducing the interval between the cable upper portion and the cable lower portion, and the vibration is generated between the cable upper portion and the cable lower portion. It can be attenuated by the attenuating means provided between them. Therefore, the vibration generated in the bridge girder portion can be appropriately damped. Further, by this, it is possible to prevent unreasonable tension from being generated in the cable member due to the vibration of the bridge girder portion, so that fatigue of the cable member can be prevented.
【図１】図１は、本発明の制振装置を適用した吊り橋を
示す図である。FIG. 1 is a diagram showing a suspension bridge to which a vibration damping device of the present invention is applied.
【図２】図２は、図１の制振装置を吊り橋の主塔とケー
ブルの間に設けた場合を示す図である。FIG. 2 is a diagram showing a case where the vibration damping device of FIG. 1 is provided between a main tower of a suspension bridge and a cable.
【図３】図３は、図１の制振装置を吊り橋のケーブルに
設けた場合を示す図である。FIG. 3 is a diagram showing a case where the vibration damping device of FIG. 1 is provided on a cable of a suspension bridge.
２……主塔部（主塔） ３……橋桁部（橋桁） ５……ケーブル部材（ケーブル） ５ａ……ケーブル上部（上部ケーブル） ５ｂ……ケーブル下部（下部ケーブル） １１……橋桁部（桁接続部） １２……ケーブル部材（ケーブル接続部） １３……バネ（弾性接続部材） １５……減衰手段（減衰可変ダンパ） ２１……主塔部（主塔接続部） ２２……ケーブル部材（ケーブル接続部） １００……橋梁（吊り橋） 2 …… Main tower (main tower) 3 …… Bridge girder (bridge girder) 5 …… Cable member (cable) 5a …… Cable upper part (upper cable) 5b …… Cable lower part (lower cable) 11 …… Bridge girder part ( Girder connection part) 12 ... Cable member (cable connection part) 13 ... Spring (elastic connection member) 15 ... Damping means (damping variable damper) 21 ... Main tower part (main tower connection part) 22 ... Cable member (Cable connection part) 100 ... Bridge (suspension bridge)
Claims (3)
らケーブル部材により釣支する形で設けられた橋桁部を
有する橋梁において、 前記ケーブル部材と前記橋桁部との間に、弾性接続手段
を、該ケーブル部材と該橋桁部を弾性的に接続する形で
設け、 前記ケーブル部材と前記橋桁部との間に、前記ケーブル
部材に対する該橋桁部の振動を減衰し得る減衰手段を、
前記弾性接続手段に対して並列に設けて構成した制振装
置。1. A bridge having a main tower section erected in a tower shape and a bridge girder section provided from the main tower section by a cable member so as to be supported between the cable member and the bridge girder section. An elastic connecting means is provided to elastically connect the cable member and the bridge girder portion, and a damping device capable of damping the vibration of the bridge girder portion with respect to the cable member between the cable member and the bridge girder portion. Means
A vibration damping device provided in parallel with the elastic connecting means.
らケーブル部材により釣支する形で設けられた橋桁部を
有する橋梁において、 前記主塔部と前記ケーブル部材との間に、弾性接続手段
を、該主塔部と該ケーブル部材を弾性的に接続する形で
設け、 前記主塔部と前記ケーブル部材との間に、前記主塔部に
対する該ケーブル部材の振動を減衰し得る減衰手段を、
前記弾性接続手段に対して並列に設けて構成した制振装
置。2. A bridge having a main tower portion erected in a tower shape and a bridge girder portion provided from the main tower portion by a cable member so as to support the main tower portion and the cable member. An elastic connecting means is provided between the main tower portion and the cable member so as to elastically connect the main tower portion and the cable member, and the vibration of the cable member with respect to the main tower portion is generated. Damping means that can dampen
A vibration damping device provided in parallel with the elastic connecting means.
らケーブル部材により釣支する形で設けられた橋桁部を
有する橋梁において、 前記ケーブル部材をケーブル上部とケーブル下部に分離
し、 前記ケーブル上部と前記ケーブル下部との間に、該ケー
ブル上部と該ケーブル下部を弾性的に接続し得る弾性接
続手段を設け、 前記ケーブル上部と前記ケーブル下部との間に、該ケー
ブル上部とケーブル下部間の振動を減衰し得る減衰手段
を、前記弾性接続手段に対して並列に設けて構成した制
振装置。3. A bridge having a main tower portion that is erected in a tower shape and a bridge girder portion that is supported by a cable member from the main tower portion, wherein the cable member is provided at an upper portion of the cable and a lower portion of the cable. Separately, elastic connecting means for elastically connecting the cable upper part and the cable lower part is provided between the cable upper part and the cable lower part, and the cable upper part is provided between the cable upper part and the cable lower part. A damping device comprising damping means capable of damping the vibration between the cable and the lower part of the cable provided in parallel to the elastic connecting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8523593A JPH06272212A (en) | 1993-03-19 | 1993-03-19 | Damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8523593A JPH06272212A (en) | 1993-03-19 | 1993-03-19 | Damping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06272212A true JPH06272212A (en) | 1994-09-27 |
Family
ID=13852905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8523593A Pending JPH06272212A (en) | 1993-03-19 | 1993-03-19 | Damping device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06272212A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101318883B1 (en) * | 2011-12-23 | 2013-10-17 | 지에스건설 주식회사 | Damping structure for cable supported bridge |
| CN109594463A (en) * | 2019-01-25 | 2019-04-09 | 中铁大桥科学研究院有限公司 | A kind of flexible impact damping unit and system applied to sling of suspension bridge |
| CN110331655A (en) * | 2019-08-12 | 2019-10-15 | 重庆市市政设计研究院 | Bridge cable wind resistance cushioning members |
-
1993
- 1993-03-19 JP JP8523593A patent/JPH06272212A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101318883B1 (en) * | 2011-12-23 | 2013-10-17 | 지에스건설 주식회사 | Damping structure for cable supported bridge |
| CN109594463A (en) * | 2019-01-25 | 2019-04-09 | 中铁大桥科学研究院有限公司 | A kind of flexible impact damping unit and system applied to sling of suspension bridge |
| CN109594463B (en) * | 2019-01-25 | 2023-08-08 | 中铁大桥科学研究院有限公司 | Flexible collision damping device and system applied to suspension bridge sling |
| CN110331655A (en) * | 2019-08-12 | 2019-10-15 | 重庆市市政设计研究院 | Bridge cable wind resistance cushioning members |
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