JPS5853288Y2 - Windproof vibration isolation device for square structures - Google Patents
Windproof vibration isolation device for square structuresInfo
- Publication number
- JPS5853288Y2 JPS5853288Y2 JP6291180U JP6291180U JPS5853288Y2 JP S5853288 Y2 JPS5853288 Y2 JP S5853288Y2 JP 6291180 U JP6291180 U JP 6291180U JP 6291180 U JP6291180 U JP 6291180U JP S5853288 Y2 JPS5853288 Y2 JP S5853288Y2
- Authority
- JP
- Japan
- Prior art keywords
- angular
- deflectors
- main tower
- structures
- bent
- 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
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Description
【考案の詳細な説明】
本考案は吊橋主塔のような角状構造物の耐風防振装置に
関する。[Detailed Description of the Invention] The present invention relates to a wind and vibration isolating device for a square structure such as a main tower of a suspension bridge.
先ず耐風防振装置の必要性と現状を説明する。First, we will explain the necessity and current situation of wind and vibration isolators.
第１図に示すように吊橋主塔１に橋軸と直角のＸ方向に
風が吹くとき、主塔１の後流下にカルマン渦が発生する
。As shown in FIG. 1, when wind blows on the suspension bridge main tower 1 in the X direction perpendicular to the bridge axis, a Karman vortex is generated downstream of the main tower 1.
このカルマン渦は主塔１の後流のウェイタ（Ｗａｋｅ）
の幅が広いほど大きく、前記カルマン渦の発生振動数と
主塔１の固有振動数とが一致すると、主塔１は風と直角
のＹ方向に振動する。This Karman vortex is a Wake downstream of main tower 1.
The wider the width of the vortex is, the larger it is, and when the generated frequency of the Karman vortex matches the natural frequency of the main tower 1, the main tower 1 vibrates in the Y direction perpendicular to the wind.
このような振動に対して現在では耐振防止装置として、
主塔１の適当な位置に平板から成るカウリング（ｃｏｗ
ｌｉｎｇ）２を、主塔１から距離Ｌ１だけ隔てて取付け
（第２図参照）、主塔１の断面廻りに空気流の剥離が発
生しにくくなるようにして、カルマン渦の発生を弱め、
主塔１の不安定振動の発生を抑制することが提案されて
いる。Currently, anti-vibration devices are used to prevent such vibrations.
A cowling consisting of a flat plate is placed at an appropriate position on the main tower 1.
ling) 2 is installed at a distance L1 from the main tower 1 (see Figure 2) to make it difficult for separation of airflow to occur around the cross section of the main tower 1, weakening the generation of Karman vortices,
It has been proposed to suppress the occurrence of unstable vibrations in the main tower 1.
またカウリング２の改善案として、第３図に示すように
平板状のカウリング２の中央部にスリツ）２ａを穿設し
、更にカルマン渦の発生を効率よく抑制したカウリング
２′も提案されている。In addition, as an improvement plan for the cowling 2, a cowling 2' has been proposed in which a slit 2a is bored in the center of the flat cowling 2, as shown in Figure 3, to further efficiently suppress the generation of Karman vortices. .
なおこのようなカウリング２あるいは２′を角状構造物
に取付けることによって空気流の流れが制御され、角状
構造物のコーナ部よりウェイタが広がる現象が減少し、
振動が生じにくくなることは、風洞実験等で既に検証さ
れている。By attaching such a cowling 2 or 2' to a square structure, the air flow is controlled, and the phenomenon of the waiter spreading out from the corner of the square structure is reduced.
It has already been verified through wind tunnel experiments that vibrations are less likely to occur.
しかしこのような耐風防振装置は実用的には大きすぎて
取付作業が難しく、また架設機材（主にクリ−バクレー
ン）の設置が困難である等の重大な欠点を有する。However, such wind and vibration isolators have serious drawbacks, such as being too large for practical use and difficult to install, and difficult to install erection equipment (mainly cleaver cranes).
そこで本考案は上記問題点に鑑みて威されたものであっ
て、架設機材の設置を妨げず、しかも防振効果を期待す
ることができる耐風防振装置を提供するものである。The present invention was developed in view of the above-mentioned problems, and it is an object of the present invention to provide a windproof and vibration-proofing device that does not hinder the installation of construction equipment and can be expected to have a vibration-proofing effect.
以下本考案の一実施例を第４図〜第９図に基づいて説明
する。An embodiment of the present invention will be described below with reference to FIGS. 4 to 9.
３．４は主塔１を構成する角状構造物、１３．１４は角
状構造物３と４とを連結する水平材と斜材、５ａ〜５Ｃ
および６ａ〜６Ｃは、角状構造物３，４の各コーナ部ａ
−Ｃに配設された板材としてのテ゛フレクターで、長手
方向に沿って第６図に示すように鈍い角度で折り曲げら
れており、角状構造物３，４に対してデフレクタ−５ａ
〜５Ｃ１６ａ〜６Ｃは次のように配設されている。3.4 is the angular structure that constitutes the main tower 1, 13.14 is the horizontal member and diagonal member that connect the angular structures 3 and 4, 5a to 5C
and 6a to 6C are corner portions a of the angular structures 3 and 4;
-C is a deflector as a plate material, which is bent along the longitudinal direction at an obtuse angle as shown in Fig.
~5C16a~6C are arranged as follows.
先ず、角状構造物３に対するデフレクタ−５ａ〜５Ｃに
ついて見ると、デフレクタ−５ａ 、５ ｂの一方の折
曲辺７，７とデフレクタ−５Ｃ，５ｄの一方の折曲辺７
，７は、角状構造物３と４の並設方向（矢印Ｘ方向）に
沿う角状構造物３の側面８と９から所定距離Ｌ２だけ隔
てて沿い、デフレクタ−５ａ、５ｃの他方の折曲辺１０
．１０とデフレクタ−５ｂ、５ｄの他方の折Ｅｌｌｌｌ
ｌＩ４１０，１０は、例えば前記側面８に隣接する面１
１と例えば前記側面９に隣接する面１２に向ってそれぞ
れ接近するよう配設されている。First, when looking at the deflectors 5a to 5C for the angular structure 3, one bent side 7, 7 of the deflectors 5a, 5b and one bent side 7 of the deflectors 5C, 5d.
, 7 are along the side surfaces 8 and 9 of the angular structure 3 along the direction in which the angular structures 3 and 4 are arranged side by side (in the direction of the arrow Curved side 10
．． 10 and the other fold of deflectors 5b and 5d.
lI410, 10 is, for example, the surface 1 adjacent to the side surface 8.
1 and a surface 12 adjacent to the side surface 9, for example, so as to approach each other.
角状構造物４に対するデフレクタ−６ａ〜６Ｃについて
も角状構造物３に対するデフレクタ−５ａ〜５Ｃと同様
に配設されている。The deflectors 6a to 6C for the angular structure 4 are also arranged in the same manner as the deflectors 5a to 5C for the angular structure 3.
角状構造物３と４の各コーナ部ａ−ｄにデフレクタ−５
ａ〜５ｄと６ａ〜６ｄを取付けたため、角状構造物３，
４の鋭利なコーナ部ａ−ｄにおけるカルマン渦の剥離が
抑制され、風による前記Ｙ方向への振動の防振効果が得
られる。Deflectors 5 are installed at each corner a-d of the angular structures 3 and 4.
Since a to 5d and 6a to 6d were installed, the square structure 3,
Separation of the Karman vortices at the sharp corner portions a to d of No. 4 is suppressed, and an effect of damping vibrations in the Y direction caused by the wind is obtained.
第８図は主塔１に対する空気流の流れを示し、矢印Ａ方
向は風の方向を示し、Ｂは空気流を表わす。FIG. 8 shows the flow of airflow toward the main tower 1, where the direction of arrow A indicates the direction of the wind and B represents the airflow.
ここで空気流は、カウリング２にスリット２ａを穿設し
たものの場合と同様に、テ゛フレクタ−５ａ〜５ｄと角
状構造物３との間を流れる。Here, the airflow flows between the reflectors 5a to 5d and the angular structure 3, similar to the case where the cowling 2 is provided with the slits 2a.
またデフレクタ−５ａと５ｂ、５Ｃと５ｄが分離して各
コーナ部ａ−ｄに配設されているので、テ゛フレクタ−
５ａと５ｂの間およびデフレクタ−５Ｃと５ｄの間の部
分では前記スリツｔ−２８と同じ働きをすることになり
、空気流を吸い寄せる。Also, since the deflectors 5a and 5b, and 5C and 5d are separately arranged at each corner part a to d, the deflectors
The portion between the deflectors 5a and 5b and between the deflectors 5C and 5d has the same function as the slit T-28, and attracts the airflow.
従って、後流のウェイタの幅Ｗが狭くなり、カルマン渦
による励起力が低減されるものである。Therefore, the width W of the downstream waiter is narrowed, and the excitation force due to the Karman vortex is reduced.
更にデフレクタ−５ａ〜５ｄ、６ａ〜６ｄは実用性とし
て架設時に大きな利点を有する。Furthermore, the deflectors 5a to 5d and 6a to 6d have a great advantage in practicality during construction.
すなわち、デフレクタ−５ａと５ｂ、５Ｃと５ｄ、６ａ
と６ｂ、６Ｃと６ｄは分離されているため、各々の重量
が小さくなり、架設時の取扱いが容易で作業能率がよく
、角状構造物３，４への取付ピースも小さいもので済む
ものである。That is, deflectors 5a and 5b, 5C and 5d, 6a
, 6b, 6C, and 6d are separated, so their weights are reduced, and handling during erection is easy and work efficiency is high, and the pieces to be attached to the square structures 3 and 4 can be small.
第９図はテ゛フレクタ−５ａ〜５ｄと６ａ〜６ｄが取付
けられた主塔１に架設機材としてのクリ−パークレーン
１５が取付けられた状態を示し、１６゜１７は側面９に
取付けられたガイドレールである。FIG. 9 shows a state where a creeper crane 15 as an erection equipment is attached to the main tower 1 to which deflectors 5a to 5d and 6a to 6d are attached, and 16° and 17 are guide rails attached to the side surface 9. It is.
デフレクタ−５ａと５ｂ、デフレクタ−５Ｃと５ｄが分
離されているため、このようにガイドレール１６．１７
の設置空間を得ることができ、テ゛フレクタ−５ａ〜５
ｄ、６ａ〜６ｄに設けたにもかかわらず主塔１へ架設機
材を取付けることができる。Since the deflectors 5a and 5b and the deflectors 5C and 5d are separated, the guide rails 16.17
It is possible to obtain an installation space for deflectors 5a to 5.
d, 6a to 6d, construction equipment can be attached to the main tower 1.
以上説明のように本考案の耐風防振装置によると、角状
構造物の各コーナ部に長手方向に沿って所定角度に折り
曲げられた板材を設け、各コーナ部に分かれた構造であ
るので、従来の耐風防振装置よりも構造が小さくなり、
架設機材の角状構造物への設置場所を確保することがで
き、また前記板材は平板ではなく、所定角度に折り曲げ
られているため、防振効果に優れているものである。As explained above, according to the windproof and vibration isolating device of the present invention, a plate bent at a predetermined angle along the longitudinal direction is provided at each corner of the angular structure, and the structure is divided into each corner. The structure is smaller than conventional wind and vibration isolators,
A place for installing the construction equipment on the square structure can be secured, and since the plate material is not a flat plate but is bent at a predetermined angle, it has an excellent vibration-proofing effect.
第１図は従来の耐風防振装置を装着した主塔の斜視図、
第２図は第１図のＡ−Ａ断面図、第３図は他の従来例の
説明図、第４図〜第９図は本考案の一実施例を示し、第
４図は本考案による耐風防振装置を装着した主塔の正面
図、第５図は第４図の横断平面図、第６図はテ゛フレク
タ一の説明図、第７図はテ゛フレクタ一の取付状態説明
図、第８図および第９図は本考案の説明図である。
１・・・・・・主塔、３，４・・・・・・角状構造物、
５ａ〜５ ｄ 、６ ａ〜６ｄ・・・・・・デフレクタ
−（板材）、７・・・・・・テ゛フレクターの一方の折
曲辺、８，９・・・・・・角状構造物並設方向に沿う角
状構造物の側面、１０・・・・・・デフレクタ−の他方
の折曲辺、１１．１２・・・・・・側面８，９に隣接す
る面、１５・・・・・・クリ−バクレーン（架設機材）
、ａ、ｌ）、ｃ、ｄ・・・・・・コーナ部。Figure 1 is a perspective view of the main tower equipped with a conventional wind and vibration isolator.
Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is an explanatory diagram of another conventional example, Figs. A front view of the main tower equipped with a wind-resistant and vibration-proof device, Fig. 5 is a cross-sectional plan view of Fig. 4, Fig. 6 is an explanatory view of the reflector 1, Fig. 7 is an explanatory view of the installation state of the reflector 1, Fig. 8 and FIG. 9 are explanatory diagrams of the present invention. 1... Main tower, 3, 4... Angular structure,
5a-5d, 6a-6d...deflector (plate material), 7...one bent side of deflector, 8, 9...angular structure Side surface of the square structure along the installation direction, 10... The other bent side of the deflector, 11.12... The surface adjacent to the side surfaces 8 and 9, 15...・・Criver crane (erecting equipment)
, a, l), c, d...corner part.
Claims (1)
、角状構造物３，４の各コーナ部ａ−Ｃに、長手方向に
沿って所定角度に折り曲げられた板材５ａ〜５ｄ、６ａ
〜６ｄを、該板材５ａ〜５ｄ、６ａ〜６ｄの一方の折曲
辺７が前記並設の方向に沿う角状構造物３，４の側面か
ら所定距離隔てて沿い、板材５ａ〜５ ｄ 、６８〜６
ｄの他方の折曲辺１０が角状構造物３，４の前記側面に
隣接する面に向って接近するよう配設されたことを特徴
とする角状構造物の耐風防振装置。In the main tower 1 made up of two angular structures 3 and 4 arranged side by side, plate members 5a to 5a are bent at a predetermined angle along the longitudinal direction at each corner a-C of the angular structures 3 and 4. 5d, 6a
-6d along with one bent side 7 of the plate materials 5a-5d, 6a-6d being a predetermined distance apart from the side surface of the square structures 3, 4 along the direction of juxtaposition, the plate materials 5a-5d, 68-6
A windproof and vibration-proofing device for an angular structure, characterized in that the other bent side 10 of the angular structure 3, 4 is arranged so as to approach a surface adjacent to the side surface of the angular structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6291180U JPS5853288Y2 (en) | 1980-05-07 | 1980-05-07 | Windproof vibration isolation device for square structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6291180U JPS5853288Y2 (en) | 1980-05-07 | 1980-05-07 | Windproof vibration isolation device for square structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56163107U JPS56163107U (en) | 1981-12-04 |
| JPS5853288Y2 true JPS5853288Y2 (en) | 1983-12-05 |
Family
ID=29657187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6291180U Expired JPS5853288Y2 (en) | 1980-05-07 | 1980-05-07 | Windproof vibration isolation device for square structures |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5853288Y2 (en) |
-
1980
- 1980-05-07 JP JP6291180U patent/JPS5853288Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56163107U (en) | 1981-12-04 |
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