JP3376836B2 - Wind-damping method of bridge girder - Google Patents
Wind-damping method of bridge girderInfo
- Publication number
- JP3376836B2 JP3376836B2 JP29645796A JP29645796A JP3376836B2 JP 3376836 B2 JP3376836 B2 JP 3376836B2 JP 29645796 A JP29645796 A JP 29645796A JP 29645796 A JP29645796 A JP 29645796A JP 3376836 B2 JP3376836 B2 JP 3376836B2
- Authority
- JP
- Japan
- Prior art keywords
- bridge girder
- wind
- movable member
- fairing
- view
- 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 - Fee Related
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は構造物、特に橋梁の
橋桁の耐風制振方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind-damping control method for structures, particularly bridge girders of bridges.
【０００２】[0002]
【従来の技術】橋梁は、自然風の作用下においては橋桁
に振動が生じることがある。この振動は、橋梁の規模
（スパン）が大きくなるほど、橋桁がフレキシブルな構
造になるほど生じ易い。2. Description of the Related Art In a bridge, vibration may occur in the girder under the action of natural wind. This vibration is more likely to occur as the scale (span) of the bridge increases and the bridge girder has a flexible structure.
【０００３】前記振動で一般的に良く知られている振動
としては、比較的低風速域（１０ｍ／秒）で発生する渦
励振、並びに、高風速（数１０ｍ／秒）で発生するフラ
ッタと呼ばれる破壊的な振動がある。Vibrations generally well known as the above-mentioned vibrations are called vortex excitation generated in a relatively low wind velocity range (10 m / sec) and flutter generated in a high wind velocity (several tens m / sec). There is destructive vibration.
【０００４】この振動防止対策は、主として風洞実験に
より事前に防止対策の検討が行われるが、その代表的な
方法として、特開昭６１ー２１１４０６号公報に示され
るような、フェアリングと呼ばれる整流部材を橋桁の端
部に取付け全体形状を流線型化する方法（以下、従来技
術１という。）、橋桁横断面をフェアリング付の断面と
する方法（以下、従来技術２という。）またはフェアリ
ングを可動としてアクティブに制振を図る方法（以下、
従来技術３という。）、が知られている。This vibration prevention measure is mainly studied in advance by a wind tunnel experiment. As a typical method, a rectification called fairing as disclosed in JP-A-61-211406 is performed. A member is attached to the end of the bridge girder to make the overall shape streamlined (hereinafter referred to as prior art 1), a cross-section of the bridge girder is a cross section with a fairing (hereinafter referred to as prior art 2), or a fairing. A method to actively suppress vibrations by moving (hereinafter,
Prior art 3 is called. ),It has been known.
【０００５】図１１は、前記従来技術１における橋桁１
の横断面図で、両側部にフェアリング２（整流部材）を
付加し、かつ、橋桁１の中央に開口１１および抑流板１
２を設けてフラッタを防止せんとするものである。FIG. 11 shows a bridge girder 1 in the prior art 1.
In the cross-sectional view of FIG. 1, fairings 2 (rectifying members) are added to both sides, and an opening 11 and a flow restrictor 1 are provided at the center of the bridge girder 1.
2 is provided to prevent flutter.
【０００６】図１２は、従来技術２における橋桁１の横
断面図で、橋桁１の端部をフェアリング２形状にし橋桁
１全体が流線形箱型断面としてフラッタを防止せんとす
るものである。FIG. 12 is a cross-sectional view of a bridge girder 1 according to the prior art 2. The bridge girder 1 has a fairing 2 shape at its end, and the entire bridge girder 1 has a streamlined box-shaped cross section to prevent flutter.
【０００７】図１３は、従来技術３に用いるフラップＡ
の斜視図で、モータ１３によりレバー１４、レバー軸１
５を駆動して翼側板１６に取付けられたフラップ１７を
駆動するものである。FIG. 13 shows a flap A used in the prior art 3.
In the perspective view of FIG.
5 is driven to drive the flap 17 attached to the blade side plate 16.
【０００８】図１４は、前記フラップＡを橋桁１の両側
部に取付けて可動フェアリング２′とし、アクティブに
橋桁１の制振を図る提案である。FIG. 14 shows a proposal for actively damping the bridge girder 1 by attaching the flaps A to both sides of the bridge girder 1 to form a movable fairing 2 '.
【０００９】[0009]
【発明が解決しようとする課題】前述のとおり、フェア
リング２は、風による橋桁１の振動を防止する手段とし
て頻繁に用いられる方法であり、前記従来技術１および
２に示す方法では、図１５に示すように、気流傾斜角が
０°の水平風が作用し、橋桁１の静的（ねじれ）変形が
小さく、かつ橋桁１が制止しているときには、流線イは
流れの剥離を生じることがなく、よって、風に起因する
振動を効果的に抑制する。As described above, the fairing 2 is a method frequently used as a means for preventing the bridge girder 1 from vibrating due to wind. In the methods shown in the prior arts 1 and 2, the fairing 2 shown in FIG. As shown in Fig. 5, when the horizontal wind with the airflow inclination angle of 0 ° acts, the static (twist) deformation of the bridge girder 1 is small, and when the bridge girder 1 is stopped, streamline a causes flow separation. Therefore, the vibration caused by the wind is effectively suppressed.
【００１０】ところが、図１６に示すように風の乱れ等
によって、一旦、橋桁１に振動が生じると、フェアリン
グ２端部には相対迎角θ（フェアリング端部の鉛直方向
速度／平均風速）が生じる。However, as shown in FIG. 16, once the bridge girder 1 vibrates due to wind turbulence or the like, the relative angle of attack θ (vertical velocity / average wind velocity at the end of the fairing) at the end of the fairing 2 is generated. ) Occurs.
【００１１】この影響は、気流傾斜角や静的（ねじれ）
変形角が大きいときには、さらに大きくなり、ついに
は、フェアリング２端部から剥離渦ロを生じるようにな
り、フェアリング２の制振効果が顕著に低下する。This effect is caused by the air flow inclination angle and static (twist).
When the deformation angle is large, the deformation angle is further increased, and finally the separation vortex B is generated from the end portion of the fairing 2, and the damping effect of the fairing 2 is significantly reduced.
【００１２】また、前述の従来技術３に示す可動フェア
リング２′によれば、相対迎角、気流傾斜角および静的
変形角に応じてフェアリング２′を回転させ、該フェア
リング２′端部における剥離渦ロの発生を抑制すること
が可能であるが、図１７に示すように迎角が大きいとき
には、フェアリング２と橋桁１の接合部１８から新たな
剥離渦ロが発生することとなり、結局、制振効果の低下
を抑制することができない問題がある。According to the movable fairing 2'shown in the prior art 3 described above, the fairing 2'is rotated according to the relative angle of attack, the airflow inclination angle and the static deformation angle, and the end of the fairing 2'is rotated. Although it is possible to suppress the generation of separation vortexes in the section, when the angle of attack is large as shown in FIG. 17, new separation vortexes are generated from the joint portion 18 between the fairing 2 and the bridge girder 1. After all, there is a problem that the reduction of the damping effect cannot be suppressed.
【００１３】また、前述の従来技術３は、フェアリング
２′全体を駆動するために、装置が大がかりになり橋桁
１への設置が困難であり、また、コスト高となる問題が
ある。Further, the above-mentioned prior art 3 has a problem that since the whole fairing 2'is driven, the device becomes large in size, installation on the bridge girder 1 is difficult, and the cost becomes high.
【００１４】[0014]
【課題を解決するための手段】前述の課題を解決する第
一の手段は、 橋桁端部のフェアリング部先端に可動部
材を軸支させ、該可動部材の軸を、気流傾斜角センサ
ー、傾斜計及び加速度計からの信号により橋桁に対する
風の迎角が最小となるように、制御駆動することを特徴
とする橋桁の耐風制振方法である。 [Means for Solving the Problems ]
The first means is a movable part at the end of the fairing at the end of the bridge girder.
The shaft of the movable member is supported by the airflow inclination angle sensor.
To the bridge girder by the signal from the ー, inclinometer and accelerometer
Characterized by control drive to minimize the angle of attack of the wind
It is a wind-resistant damping method for bridge girders.
【００１５】前述の第一の手段によれば、橋桁１に対す
る相対迎角、気流傾斜角および静的変形角によって発生
する迎角θを打ち消すように可動部材３を軸４を軸芯と
して回動することにより、図６に示すように大迎角時に
も剥離の弱い流れにすることにより、高い制振効果が得
られる。尚、図５は迎角が０°のときの流線を示したも
のである。According to the above-mentioned first means, the movable member 3 is rotated about the shaft 4 so as to cancel the angle of attack θ generated by the relative angle of attack with respect to the bridge girder 1, the airflow inclination angle and the static deformation angle. As a result, as shown in FIG. 6, a flow with weak separation is obtained even at a large angle of attack, whereby a high vibration damping effect is obtained. Note that FIG. 5 shows the streamlines when the angle of attack is 0 °.
【００１６】これは、図７に示すように、可動部材３の
勾配α１とフェアリングの勾配α２との二種類の勾配を
構成することにより風の流れをスムーズに橋桁１の路面
１′に導き、剥離の弱い流れとする。As shown in FIG. 7, this is because the flow of wind is smoothly guided to the road surface 1'of the bridge girder 1 by constructing two kinds of slopes, that is, the slope α1 of the movable member 3 and the slope α2 of the fairing. , Flow with weak peeling.
【００１７】従って、気流傾斜角と静的変形角について
は可動部材を静的な平均値的制御を行い、また、相対迎
角に対しては動的な制御を行うことが望ましい。Therefore, it is desirable that the movable member is statically averaged for the air flow inclination angle and the static deformation angle, and that the relative angle of attack is dynamically controlled.
【００１８】前述の課題を解決する第二の手段は、可動
部材が板材であることを特徴とする前記第一の手段に記
載の橋桁の耐風制振方法である。The second means for solving the above-mentioned problems is the bridge girder anti-vibration method described in the first means, characterized in that the movable member is a plate member.
【００１９】前述の第二の手段によれば、可動部材３を
板材とすることにより、軽量で簡単な構造とすることが
でき、コスト的に安価である。According to the above-mentioned second means, since the movable member 3 is made of a plate material, it is possible to make it lightweight and have a simple structure, and the cost is low.
【００２０】前述の課題を解決する第三の手段は、可動
部材が断面三角形状であることを特徴とする前記第一の
手段に記載の橋桁の耐風制振方法である。A third means for solving the above-mentioned problems is the wind-damping damping method for bridge girders described in the first means, characterized in that the movable member has a triangular cross section.
【００２１】前述の第三の手段によれば、可動部材を断
面三角形状とすることにより、より風の流れが整流され
る。According to the above-mentioned third means, the flow of the wind is further rectified by making the movable member triangular in cross section.
【００２２】[0022]
【発明の実施の形態】図１は、本発明にかかる橋桁の耐
風制振方法を説明する橋桁の横断面図で、図２はフェア
リング部２を一部断面図とした図１の平面図である。1 is a cross-sectional view of a bridge girder for explaining a wind-damping-resistant method of a bridge girder according to the present invention, and FIG. 2 is a plan view of FIG. Is.
【００２３】１は吊橋等の橋桁で、該橋桁１の両側部に
はフェアリング部２が取付けられている。前記フェアリ
ング部２は、橋桁１の構造の一部としてもよい。Reference numeral 1 is a bridge girder such as a suspension bridge, and fairing portions 2 are attached to both sides of the bridge girder 1. The fairing 2 may be part of the structure of the bridge girder 1.
【００２４】前記フェアリング部２の先端には板状３ａ
の可動部材３が軸４で軸支されており、可動部材３は軸
４を軸芯として矢視方向に回動する。A plate-like 3a is provided at the tip of the fairing portion 2.
The movable member 3 is pivotally supported by the shaft 4, and the movable member 3 rotates in the arrow direction with the shaft 4 as the axis.
【００２５】５は可動部材３の駆動機構であり、５′は
可動部材３と駆動機構５との間の操作軸、６は超音波風
速計等の気流傾斜角センサー、７は傾斜計、加速度計等
の変位検出器であり、８はコントローラである。尚、９
は高欄、１０は地覆である。Reference numeral 5 is a drive mechanism for the movable member 3, 5'is an operation axis between the movable member 3 and the drive mechanism 5, 6 is an air flow inclination angle sensor such as an ultrasonic anemometer, 7 is an inclinometer, and acceleration. Reference numeral 8 is a displacement detector such as a meter, and 8 is a controller. Incidentally, 9
Is a handrail and 10 is a ground cover.
【００２６】以上からなる装置構成で、気流傾斜角セン
サー６および変位検出器７からの信号によりコントロー
ラ８で、迎角を打ち消すための信号を発信し、駆動機構
５により可動部材３を駆動し剥離の弱い流れに整流す
る。With the above-mentioned device configuration, the controller 8 sends a signal for canceling the angle of attack by the signals from the air flow inclination angle sensor 6 and the displacement detector 7, and the driving mechanism 5 drives the movable member 3 to separate it. Rectify into a weak flow of.
【００２７】図３は、前記駆動機構５の詳細を図示した
側面図で、可動部材３の他端は操作軸５′が一体的に取
付けられ、該操作軸５′の端部にシリンダー機構５ａの
ロッド５ｂが連結され、シリンダー機構５ａの伸縮作用
により前記軸４を軸芯として可動部材３が矢視方向に回
動する。FIG. 3 is a side view showing the details of the drive mechanism 5. An operating shaft 5'is integrally attached to the other end of the movable member 3, and the cylinder mechanism 5a is attached to the end of the operating shaft 5 '. The rod 5b is connected, and the movable member 3 rotates in the direction of the arrow with the shaft 4 as the axis by the expansion and contraction of the cylinder mechanism 5a.
【００２８】また、図４は前記駆動機構５の他の実施の
形態を示した側面図で、可動部材３と一体となった軸４
に対し、モータ５ｃからの操作軸５′とが傘歯車機構
４′で連結され、モータ５ｃの回転により可動部材３を
矢視方向に回動するものである。FIG. 4 is a side view showing another embodiment of the drive mechanism 5, which is a shaft 4 integrated with the movable member 3.
On the other hand, the operation shaft 5'from the motor 5c is connected by the bevel gear mechanism 4 ', and the movable member 3 is rotated in the arrow direction by the rotation of the motor 5c.
【００２９】前記駆動機構５の他の実施の形態として
は、油圧式のトルクヒンジタイプのものを使用してもよ
い。As another embodiment of the drive mechanism 5, a hydraulic torque hinge type may be used.
【００３０】図８は、上下非対称のフェアリング部２を
示した側断面図で、フェアリング部がブロックとして橋
桁１に取付けられ、その先端に可動部材３が取付けられ
ている。FIG. 8 is a side cross-sectional view showing the vertically asymmetrical fairing portion 2. The fairing portion is attached to the bridge girder 1 as a block, and the movable member 3 is attached to the tip thereof.
【００３１】また、図９は端部が上下非対称のフェアリ
ング部２とした橋桁１の側断面図で、橋桁１の先端に可
動部材３が取付けられている。FIG. 9 is a side sectional view of the bridge girder 1 in which the ends are vertically asymmetrical fairing portions 2, and a movable member 3 is attached to the tip of the bridge girder 1.
【００３２】図１０は、可動部材３が断面三角形状３ｂ
とした側断面図であり、翼型の流線形とすることで、よ
り整流効果が発揮できる。In FIG. 10, the movable member 3 has a triangular cross section 3b.
Is a side cross-sectional view, and the rectification effect can be more exerted by adopting an airfoil streamline.
【００３３】[0033]
【発明の効果】本発明は以上であるから、橋桁が相対迎
角、気流傾斜角、静的変形角の影響によって大迎角の風
をうけるとき、剥離の弱い流線を形成することが可能と
なり、迎角が小さいときと同様の高い制振効果を発揮す
ることができる。As described above, according to the present invention, when the bridge girder receives wind at a large angle of attack due to the influence of the relative angle of attack, the airflow inclination angle, and the static deformation angle, it is possible to form streamlines with weak separation. Therefore, the same high damping effect as when the angle of attack is small can be exhibited.
【００３４】さらに、本発明は、フェアリングまたはフ
ェアリング形状とした橋桁の一部に設置される平板状も
しくは三角形形状の可動部材を駆動する方式であるた
め、フェアリング全体を駆動する従来方式に比べてコン
パクトに構成でき、施工性に優れ、低コスト化を実現で
きる効果を有する。Further, since the present invention is a method of driving a movable member having a flat plate shape or a triangular shape installed on a part of a fairing or a fairing-shaped bridge girder, a conventional method for driving the entire fairing is used. Compared to this, it has a compact structure, excellent workability, and cost reduction.
【図１】本発明にかかる橋桁の耐風制振方法を説明する
橋桁の横断面図。FIG. 1 is a cross-sectional view of a bridge girder for explaining a wind-damping suppression method for a bridge girder according to the present invention.
【図２】フェアリング部を一部断面図とした図１の平面
図。FIG. 2 is a plan view of FIG. 1 in which a fairing portion is partially sectional view.
【図３】本発明の可動部材の駆動機構の詳細を示した横
断面図。FIG. 3 is a cross-sectional view showing details of a drive mechanism for a movable member of the present invention.
【図４】本発明の可動部材の駆動機構の他の駆動機構の
詳細を示した横断面図。FIG. 4 is a cross-sectional view showing details of another drive mechanism of the drive mechanism for the movable member of the present invention.
【図５】本発明にかかる橋桁の耐風制振方法の効果を示
す横断面図で、迎角が０°のときの流線を示す。FIG. 5 is a cross-sectional view showing the effect of the wind-damping suppression method for a bridge girder according to the present invention, showing a streamline when the angle of attack is 0 °.
【図６】本発明にかかる橋桁の耐風制振方法の効果を示
す横断面図で、迎角θが大迎角のときの流線を示す。FIG. 6 is a cross-sectional view showing the effect of the wind-damping suppression method for a bridge girder according to the present invention, showing a streamline when the angle of attack θ is a large angle of attack.
【図７】本発明にかかる橋桁の耐風制振方法の効果を示
す横断面図で、迎角θが大迎角のときのフェアリング部
および可動部材の上面の勾配を示す。FIG. 7 is a cross-sectional view showing the effect of the wind-damping damping method for a bridge girder according to the present invention, showing the slopes of the upper surfaces of the fairing part and the movable member when the angle of attack θ is a large angle of attack.
【図８】本発明にかかる橋桁の耐風制振方法の可動部材
の取付け方法を示す横断面図で、上面が大勾配となった
フェアリング部に取付けたケースを示す。FIG. 8 is a cross-sectional view showing a method of mounting a movable member in the wind-damping damping method for a bridge girder according to the present invention, showing a case mounted on a fairing portion whose upper surface has a large slope.
【図９】本発明にかかる橋桁の耐風制振方法の可動部材
の取付け方法を示す横断面図で、下面が大勾配となった
フェアリング部に取付けたケースを示す。FIG. 9 is a cross-sectional view showing a method of mounting a movable member in a wind-damping damping method for a bridge girder according to the present invention, showing a case mounted on a fairing portion whose lower surface has a large slope.
【図１０】本発明にかかる橋桁の耐風制振方法の可動部
材の他の実施の形態を示す横断面図。FIG. 10 is a cross-sectional view showing another embodiment of the movable member of the method for wind-damping damping of bridge girders according to the present invention.
【図１１】従来技術１にかかるフェアリングを取付けた
橋桁の横断面図。FIG. 11 is a cross-sectional view of a bridge girder to which a fairing according to the related art 1 is attached.
【図１２】従来技術２にかかるフェアリングを構造の一
部とした橋桁の横断面図。FIG. 12 is a cross-sectional view of a bridge girder in which a fairing according to the related art 2 is part of the structure.
【図１３】従来技術３にかかるフラップＡの斜視図。FIG. 13 is a perspective view of a flap A according to Related Art 3.
【図１４】従来技術３にかかるフラップＡを用いた橋桁
の横断面図。FIG. 14 is a cross-sectional view of a bridge girder using a flap A according to Related Art 3.
【図１５】従来技術２にかかる橋桁の静止時の風の流線
を示す横断面図。FIG. 15 is a cross-sectional view showing a streamline of wind when the bridge girder according to the related art 2 is stationary.
【図１６】従来技術２にかかる橋桁の振動時の風の流線
を示す横断面図。FIG. 16 is a transverse cross-sectional view showing a streamline of wind when the bridge girder according to the related art 2 vibrates.
【図１７】従来技術３にかかるフラップＡを用いた橋桁
の振動時の横断面図。FIG. 17 is a transverse cross-sectional view of a bridge girder using the flap A according to the related art 3 when vibrating.
１ 橋桁 ２ フェアリング部 ３ 可動部材 ３ａ 板状の可動部材 ３ｂ 三角形状の可動部材 ４ 軸 ５ 駆動機構 ６ 気流傾斜角センサー ７ 変位検出器 ８ コントローラ ９ 高欄 １０ 地覆 １１ 開口 １２ 抑流板 1 bridge girder 2 fairing section 3 movable members 3a Plate-shaped movable member 3b Triangular movable member 4 axes 5 Drive mechanism 6 Airflow tilt angle sensor 7 Displacement detector 8 controller 9 handrails 10 ground cover 11 openings 12 Suppression board
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平８−158314（ＪＰ，Ａ) 特開 平５−181542（ＪＰ，Ａ) 特開 平２−171404（ＪＰ，Ａ) 実開 平５−87006（ＪＰ，Ｕ) 実公 昭47−14360（ＪＰ，Ｙ１) 実公 昭50−17224（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.7，ＤＢ名) E01D 1/00 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-158314 (JP, A) JP-A-5-181542 (JP, A) JP-A-2-171404 (JP, A) Actual Kaihei 5- 87006 (JP, U) Actual public 47-14360 (JP, Y1) Actual public 50-17224 (JP, Y1) (58) Fields investigated (Int.Cl. 7 , DB name) E01D 1/00
Claims (3)
材を軸支させ、該可動部材の軸を、気流傾斜角センサ
ー、傾斜計及び加速度計からの信号により橋桁に対する
風の迎角が最小となるように、制御駆動することを特徴
とする橋桁の耐風制振方法。1. A movable member is axially supported at a tip of a fairing portion at an end of a bridge girder, and an axis of the movable member is used as an airflow inclination angle sensor.
A wind-damping method for bridge girders, which is controlled and driven so that the angle of attack of the wind on the bridge girder is minimized by signals from the inclinometer and accelerometer .
請求項１に記載の橋桁の耐風制振方法。2. The wind-resistant vibration damping method for a bridge girder according to claim 1, wherein the movable member is a plate member.
徴とする請求項１に記載の橋桁の耐風制振方法。3. The wind-damping damping method for a bridge girder according to claim 1, wherein the movable member has a triangular cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29645796A JP3376836B2 (en) | 1996-11-08 | 1996-11-08 | Wind-damping method of bridge girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29645796A JP3376836B2 (en) | 1996-11-08 | 1996-11-08 | Wind-damping method of bridge girder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10140520A JPH10140520A (en) | 1998-05-26 |
| JP3376836B2 true JP3376836B2 (en) | 2003-02-10 |
Family
ID=17833806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29645796A Expired - Fee Related JP3376836B2 (en) | 1996-11-08 | 1996-11-08 | Wind-damping method of bridge girder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3376836B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HRPK20050311B3 (en) * | 2005-04-06 | 2008-07-31 | Horvat Darko | Protection of bridges from the bora wind and other external influences |
| WO2016162059A1 (en) * | 2015-04-08 | 2016-10-13 | Technische Universität Hamburg-Harburg | Device for damping vibrations of a bridge |
| CN105525565B (en) * | 2016-01-28 | 2018-02-06 | 西南交通大学 | A kind of streamlined box beam whirlpool shake vibration suppression construction |
| CN107609550B (en) * | 2017-09-22 | 2019-08-13 | 广东天虹工程咨询有限公司 | One kind being used for low clearance bridge image collecting device |
| CN108755390B (en) * | 2018-05-22 | 2020-08-18 | 东南大学 | Active control system and control method for improving wind resistance of long-span bridge |
| CN109634312B (en) * | 2018-12-31 | 2024-05-28 | 华测检测认证集团股份有限公司 | Automatic anti-fall atmospheric sampling equipment |
| CN111119031A (en) * | 2020-01-14 | 2020-05-08 | 中铁二院工程集团有限责任公司 | Device for inhibiting bridge flutter and using method thereof |
| CN111101436A (en) * | 2020-01-14 | 2020-05-05 | 中铁二院工程集团有限责任公司 | Bridge wind barrier device and using method thereof |
| CN111305042B (en) * | 2020-02-29 | 2021-08-03 | 东北林业大学 | Large-span bridge wind vibration control method of self-adaptive swing flap |
-
1996
- 1996-11-08 JP JP29645796A patent/JP3376836B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10140520A (en) | 1998-05-26 |
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