JPS6355206A - Vibrationproof bridge - Google Patents
Vibrationproof bridgeInfo
- Publication number
- JPS6355206A JPS6355206A JP20070186A JP20070186A JPS6355206A JP S6355206 A JPS6355206 A JP S6355206A JP 20070186 A JP20070186 A JP 20070186A JP 20070186 A JP20070186 A JP 20070186A JP S6355206 A JPS6355206 A JP S6355206A
- Authority
- JP
- Japan
- Prior art keywords
- truss
- floor slab
- girder
- bridge
- deck
- 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
- 230000003068 static effect Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JHJNPOSPVGRIAN-SFHVURJKSA-N n-[3-[(1s)-1-[[6-(3,4-dimethoxyphenyl)pyrazin-2-yl]amino]ethyl]phenyl]-5-methylpyridine-3-carboxamide Chemical compound C1=C(OC)C(OC)=CC=C1C1=CN=CC(N[C@@H](C)C=2C=C(NC(=O)C=3C=C(C)C=NC=3)C=CC=2)=N1 JHJNPOSPVGRIAN-SFHVURJKSA-N 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はＩ！梁の防上構造に関する。[Detailed description of the invention] (Industrial application field) The present invention is I! Regarding the roof protection structure of beams.
（従来の技術〕
従来のトラス桁吊橋は、第４図に示すようにメインケー
ブル０４よりハンガー０５を介して吊り下げられたトラ
ス補剛桁０１の上部に床版０３を設置した構造となって
いる。(Prior Art) As shown in Fig. 4, a conventional truss girder suspension bridge has a structure in which a deck slab 03 is installed on top of a truss stiffening girder 01 suspended from a main cable 04 via a hanger 05. There is.
しかしながら、上記の構造では次のような欠点があった
。However, the above structure had the following drawbacks.
（１）トラス部材の抗力特性が支配的であるため、静的
風荷重が大きい（抗力係数で約２．０）。(1) Since the drag characteristics of the truss members are dominant, the static wind load is large (drag coefficient is approximately 2.0).
（２）床版０３と上部主構０２とが隣接しているため、
両者の干渉によるフラッタ−が発生する。(2) Because the floor slab 03 and the upper main structure 02 are adjacent to each other,
Flutter occurs due to interference between the two.
（３建築限界０６の制約により床版０３の上方を横切っ
てハンガー０５を設けることができないため、トラス補
剛桁０１に十分な捩れ剛性を与えることができない。(Because the hanger 05 cannot be provided across the upper part of the floor slab 03 due to the restriction of the construction limit 06, it is not possible to provide sufficient torsional rigidity to the truss stiffening girder 01.
本発明は上記の欠点を解消するためになされたもので、
その目的は静的風荷重が小さく、耐フラッタ−特性の良
好な防振橋梁を提供することにある。The present invention has been made to solve the above-mentioned drawbacks.
The purpose is to provide a vibration-isolated bridge with low static wind load and good flutter resistance.
上記目的を達成するために本発明は、矩形断面の四隅に
主構を配したトラス桁の中央部に床版を設置するととも
に、上記床版の両端に防」板を取付けたことを特徴とす
るものである。In order to achieve the above object, the present invention is characterized in that a floor slab is installed in the center of a truss girder whose main structure is arranged at the four corners of a rectangular cross section, and barrier plates are attached to both ends of the floor slab. It is something to do.
（作 用〕
本発明では、トラス桁の中央部に床版を設置することに
より床版と主構を離して配設できるため、両者の相互干
渉によるフラッタ−が発生しなくなり、また床版の両端
に防風板を取付けることによリドラス桁を通り抜けた風
が防風板を介して床版に作用するので床版自身によるフ
ラッタ−も発生しなくなる。(Function) In the present invention, by installing the floor slab in the center of the truss girder, the floor slab and the main structure can be placed apart from each other, so flutter due to mutual interference between the two will not occur, and the floor slab By attaching windbreak plates at both ends, the wind passing through the lidlas girder acts on the floor slab via the windbreak plates, so flutter caused by the floor slab itself will no longer occur.
以下、図面を参照して本発明の一実施例について説明す
る。An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明によるトラス桁吊橋の一実施例を示すも
ので、図中１はトラス補剛桁、２ａは上部主構、２ｂは
下部主橋、３は床版、４はメイン−ケーブル、５はハン
ガーである。前記床版３は上部主構２ａと下部主構２ｂ
とを繋ぐトラス補剛桁１の中央部に設置され、トラス補
剛桁１はメインケーブル４よりハンガー５を介して吊り
下げられている。そして、床版３の両端には防風板７が
取付けられ、風を通さない構造となっている。Figure 1 shows an embodiment of a truss girder suspension bridge according to the present invention, in which 1 is a truss stiffening girder, 2a is an upper main structure, 2b is a lower main bridge, 3 is a deck slab, and 4 is a main cable. , 5 is a hanger. The floor slab 3 has an upper main structure 2a and a lower main structure 2b.
The truss stiffening girder 1 is installed in the center of the truss stiffening girder 1 that connects the truss stiffening girder 1 with the main cable 4 via the hanger 5. Windbreak plates 7 are attached to both ends of the floor slab 3 to prevent wind from passing through.
上記の構造によると、床版３と主構２ａ及び２ｂを離し
て配設できるため両者の干渉によるフラッタ−が発生し
なくなり、耐フラッタ−特性を向上させることができる
。またトラス補剛桁１を通り抜けた風が防風板７に当っ
て床版３に作用するため、床版自身によるフラッタ−も
発生しなくなり、さらにトラス補剛桁全体の抗力係数が
約３０％程度（ｆｆｌ荷重（抗力）としては数％〉減少
する。またメインケーブル４とトラス補剛桁１との間に
補強用のケーブル１５を建築限界６の制約を受けずに斜
めに張ることができるので、トラス補剛桁１の捩れ剛性
を増大させることができる。According to the above structure, since the floor slab 3 and the main structures 2a and 2b can be disposed apart from each other, flutter due to interference between the two does not occur, and the flutter resistance can be improved. In addition, since the wind passing through the truss stiffening girder 1 hits the windbreak plate 7 and acts on the deck slab 3, flutter due to the deck itself is no longer generated, and the drag coefficient of the entire truss stiffening girder is approximately 30%. (The ffl load (resistance) is reduced by several percent.) Also, the reinforcing cable 15 can be strung diagonally between the main cable 4 and the truss stiffening girder 1 without being restricted by the building limits 6. , the torsional rigidity of the truss stiffening girder 1 can be increased.
なお、上記実施例では床版３の両端に平板状の防風板７
を取付けたが、第２図および第３図に示すように床版３
の両端に円弧状の防風板７を取付けてもよい。In the above embodiment, flat windbreak plates 7 are provided at both ends of the floor slab 3.
However, as shown in Figures 2 and 3, the floor slab 3
Arc-shaped windbreak plates 7 may be attached to both ends of the windshield.
以上のように本発明によれば、トラス桁の中央部に床版
を設置するとともに、床版の両端に防風板を取付けたの
で、静的風荷重が小さくかつ耐フラッタ−特性の良好な
トラス桁断面を得ることができる。As described above, according to the present invention, the deck slab is installed in the center of the truss girder, and windbreak plates are attached to both ends of the deck slab, so that the truss has a small static wind load and good flutter resistance. A girder cross section can be obtained.
第１図は本発明によるトラス桁吊橋の一実施例を示す断
面図、第２図および第３図は本発明による防風板の他の
実施例を示す図、第字図は従来例を示す図である。
１・・・トラス補剛桁、２ａ、２ｂ・・・主構、３・・
・床版、４・・・メインケーブル、５・・・ハンガー、
７・・・防風板。Fig. 1 is a cross-sectional view showing one embodiment of the truss girder suspension bridge according to the present invention, Figs. 2 and 3 are views showing other embodiments of the windbreak plate according to the present invention, and the numeral numeral indicates a conventional example. It is. 1...Truss stiffening girder, 2a, 2b...Main structure, 3...
・Floor slab, 4... Main cable, 5... Hanger,
7... Windbreak plate.
Claims (1)
を設置するとともに、上記床版の両端に防風板を取付け
たことを特徴とする防振橋梁。A vibration-proof bridge characterized in that a deck slab is installed in the center of a truss girder with main structures arranged at the four corners of a rectangular cross section, and windbreak plates are attached to both ends of the deck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61200701A JPH0629485B2 (en) | 1986-08-27 | 1986-08-27 | Truss girder suspension bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61200701A JPH0629485B2 (en) | 1986-08-27 | 1986-08-27 | Truss girder suspension bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6355206A true JPS6355206A (en) | 1988-03-09 |
| JPH0629485B2 JPH0629485B2 (en) | 1994-04-20 |
Family
ID=16428793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61200701A Expired - Fee Related JPH0629485B2 (en) | 1986-08-27 | 1986-08-27 | Truss girder suspension bridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0629485B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5723539U (en) * | 1980-07-09 | 1982-02-06 | ||
| JPS6072858U (en) * | 1983-10-25 | 1985-05-22 | 石川島播磨重工業株式会社 | Windproof balustrade |
-
1986
- 1986-08-27 JP JP61200701A patent/JPH0629485B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5723539U (en) * | 1980-07-09 | 1982-02-06 | ||
| JPS6072858U (en) * | 1983-10-25 | 1985-05-22 | 石川島播磨重工業株式会社 | Windproof balustrade |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0629485B2 (en) | 1994-04-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |