JPH0781243B2 - Tower structure - Google Patents
Tower structureInfo
- Publication number
- JPH0781243B2 JPH0781243B2 JP24552286A JP24552286A JPH0781243B2 JP H0781243 B2 JPH0781243 B2 JP H0781243B2 JP 24552286 A JP24552286 A JP 24552286A JP 24552286 A JP24552286 A JP 24552286A JP H0781243 B2 JPH0781243 B2 JP H0781243B2
- Authority
- JP
- Japan
- Prior art keywords
- tower
- wind
- slit
- main tower
- nagasaki
- 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
- 230000000694 effects Effects 0.000 description 4
- 230000005284 excitation Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 241001562081 Ikeda Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は鉄構製品の橋梁、煙突等に適用される塔状構造
物の断面形状に関する。TECHNICAL FIELD The present invention relates to a cross-sectional shape of a tower-like structure applied to bridges, chimneys, etc. of steel structure products.
長方形あるいは円形の断面形状を有する塔状構造物に風
が作用した時、塔状構造物の後流には周期的に渦が発生
し、この渦に起因する有害な振動が発生することが多
い。When wind acts on a tower-like structure having a rectangular or circular cross-sectional shape, vortices are periodically generated in the wake of the tower-like structure, and harmful vibrations often occur due to this vortex. .
これに対して従来は第2,3図に示すように構造物01のま
わりの流れを整流する部材（カウリング）03を取付ける
か又は第4,5図のように流れを乱す部材（ヘリカルワイ
ヤー）04を取付けるかあるいは長方形断面であれば四隅
を切り欠くなどの空力的方法によって振動の発生を防い
でいる。On the other hand, conventionally, a member (cow ring) 03 that rectifies the flow around the structure 01 is attached as shown in FIGS. 2 and 3, or a member that disturbs the flow (helical wire) as shown in FIGS. Vibration is prevented by mounting 04 or by aerodynamic methods such as notching the four corners if it has a rectangular cross section.
前述のように付加物をとりつける従来方法は、塔本体と
のとりつけがむづかしく、また、維持・管理を行なう上
で塗装がしにくく、更に、景観上違和感がある等の問題
点がある。As described above, the conventional method of attaching the adjunct has problems that it is difficult to attach it to the tower body, it is difficult to paint for maintenance and management, and there is a sense of discomfort in the landscape.
また、長方形断面の四隅を切欠く方法は、断面内におけ
る構造部材の配置がむずかしく、更に、振動発生を防ぐ
効果は必らずしも十分でない。Further, in the method of cutting out the four corners of the rectangular cross section, it is difficult to arrange the structural members in the cross section, and further, the effect of preventing the occurrence of vibration is not necessarily sufficient.
〔問題点を解決するための手段〕 塔状構造物の側面にスリツトを設け、風の通りみちをつ
くることによって、風による振動を防ぐことができる。[Means for Solving Problems] By providing slits on the side surface of the tower-like structure and forming a passage for the wind, vibration due to the wind can be prevented.
塔にスリツトを設けることによって、スリツトに風が流
れこみ、塔背後に生じる交番渦を吹き流し、塔に働らく
励振力を弱める作用を有する。By providing slits in the tower, the wind flows into the slits, and the alternating vortices generated behind the tower are blown off, which has the effect of weakening the excitation force acting on the tower.
以下、本発明の一実施例を第１図に示す。 An embodiment of the present invention will be shown below in FIG.
第１図において１は斜張橋の主塔であり、高さ方向に風
２の通るスリツト５が設置してある。In FIG. 1, 1 is the main tower of the cable-stayed bridge, and the slit 5 through which the wind 2 passes is installed in the height direction.
また、スリツト５によって分割された主塔１を連結する
ために部材６が配置されている。Further, a member 6 is arranged to connect the main tower 1 divided by the slit 5.
主塔１の２方向にワイヤー８が張られるので、主塔１は
矢印７の方向に振動する。Since the wire 8 is stretched in two directions of the main tower 1, the main tower 1 vibrates in the direction of arrow 7.
主塔１の側面にスリツト５を設けることによって、スリ
ツト５に風２が流れこみ、塔背後に生じる交番渦を吹き
流し、塔１に働らく励振力を弱める作用を有する。By providing the slit 5 on the side surface of the main tower 1, the wind 2 flows into the slit 5 and blows the alternating vortex generated behind the tower, thereby having the effect of weakening the excitation force acting on the tower 1.
第１図に示す主塔１に対して２の風向から風が作用した
時の風速と振幅の関係を第６図に示す。また、従来型の
長方形断面の塔状構造物の場合の風速と振幅の関係を第
７図に示す。第６図と第７図より、風が作用した時の振
動が、本発明により大幅に低減されていることがわか
る。FIG. 6 shows the relationship between the wind speed and the amplitude when the wind acts on the main tower 1 shown in FIG. FIG. 7 shows the relationship between the wind speed and the amplitude in the case of a conventional tower-shaped structure having a rectangular cross section. It can be seen from FIGS. 6 and 7 that the vibration when the wind acts is significantly reduced by the present invention.
斜張橋の主塔の側面にスリツトを設けることにより、横
方向の風を受けた際に、塔背面における交番渦の発生が
防止され、塔に働く励振力を弱めることができる。By providing a slit on the side surface of the main tower of the cable-stayed bridge, it is possible to prevent the generation of alternating vortices on the back surface of the tower when a lateral wind is received, and to weaken the exciting force acting on the tower.
第１図は本発明塔状構造物を実施した斜張橋主塔の斜視
図、第２図は従来装置の平面図、第３図は第２図の側面
図、第４図は他の従来装置の平面図、第５図は第４図の
側面図、第６図は本発明による主塔に横風が作用した時
の風速と振幅の関係を示し、第７図は対策を施さない場
合の風速と振幅の関係を示す。 １……主塔、２……風、５……スリツト、８……ワイヤ
ーFIG. 1 is a perspective view of a main tower of a cable-stayed bridge in which the tower structure of the present invention is implemented, FIG. 2 is a plan view of a conventional apparatus, FIG. 3 is a side view of FIG. 2, and FIG. FIG. 5 is a plan view of the apparatus, FIG. 5 is a side view of FIG. 4, FIG. 6 shows a relation between wind speed and amplitude when cross wind acts on the main tower according to the present invention, and FIG. 7 shows a case where no measures are taken. The relationship between wind speed and amplitude is shown. 1 ... Main tower, 2 ... Wind, 5 ... Slit, 8 ... Wire
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中西 正昭 大阪府箕面市大字粟生間谷1130番地の19− 103号 (72)発明者 石田 貢 大阪府池田市伏尾台３丁目２番地の17 (72)発明者 井下 泰具 大阪府堺市鴨谷台３丁２番５−109 (72)発明者 本田 明弘 長崎県長崎市飽の浦町１番１号 三菱重工 業株式会社長崎研究所内 (72)発明者 斎藤 通 長崎県長崎市飽の浦町１番１号 三菱重工 業株式会社長崎研究所内 (72)発明者 坂田 弘 広島県広島市西区観音新町４丁目６番22号 三菱重工業株式会社広島研究所内 (72)発明者 加地 健一 広島県広島市西区観音新町４丁目６番22号 三菱重工業株式会社広島製作所内 審査官 峰 祐治 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masaaki Nakanishi Masaaki Nakanishi 19-103 No. 1130, Aougaya, Minoh City, Osaka Prefecture (72) Inventor Mitsugu Ishida 17 (72) 3-chome, Fushiodai, Ikeda, Osaka Inventor Taiji Inoue 3-5-2-10 Kamodaidai, Sakai City, Osaka Prefecture (72) Inventor Akihiro Honda 1-1 1-1 Atsunouramachi, Nagasaki City, Nagasaki Prefecture Mitsubishi Heavy Industries, Ltd. Nagasaki Laboratory (72) Inventor, Saito Tsuru 1-1, Atsunoura-machi, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Research Institute (72) Inventor Hiroshi Sakata 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries Ltd. Hiroshima Research Institute (72) Inventor Kenichi Kaji 4-6-22 Kannon-shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Prefecture Yuji Mine, Examiner, Hiroshima Works, Mitsubishi Heavy Industries, Ltd.
Claims (1)
から張られたワイヤーなどで拘束され、他の２方向の振
動が問題になる塔状構造物において、前記ワイヤーを張
った２方向からの風を通過させるスリツトを設け、その
方向の耐風性を高めることを特徴とする塔状構造物。1. A tower-like structure in which two directions such as a main tower of a bridge are constrained by bridge girders or wires stretched from the ground, and vibration in the other two directions poses a problem. A tower-like structure characterized in that a slit is provided to allow passage of the wind to enhance wind resistance in that direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24552286A JPH0781243B2 (en) | 1986-10-17 | 1986-10-17 | Tower structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24552286A JPH0781243B2 (en) | 1986-10-17 | 1986-10-17 | Tower structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63103104A JPS63103104A (en) | 1988-05-07 |
| JPH0781243B2 true JPH0781243B2 (en) | 1995-08-30 |
Family
ID=17134934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24552286A Expired - Lifetime JPH0781243B2 (en) | 1986-10-17 | 1986-10-17 | Tower structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0781243B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0372909U (en) * | 1989-11-20 | 1991-07-23 | ||
| JP4709554B2 (en) * | 2005-01-07 | 2011-06-22 | 三菱重工鉄構エンジニアリング株式会社 | Bridge main tower and bridge equipped with the same |
| JP4939593B2 (en) * | 2009-11-30 | 2012-05-30 | 三菱重工鉄構エンジニアリング株式会社 | Bridge main tower and bridge equipped with the same |
-
1986
- 1986-10-17 JP JP24552286A patent/JPH0781243B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63103104A (en) | 1988-05-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |