JPH01312107A - Cable stayed bridge - Google Patents
Cable stayed bridgeInfo
- Publication number
- JPH01312107A JPH01312107A JP14326788A JP14326788A JPH01312107A JP H01312107 A JPH01312107 A JP H01312107A JP 14326788 A JP14326788 A JP 14326788A JP 14326788 A JP14326788 A JP 14326788A JP H01312107 A JPH01312107 A JP H01312107A
- Authority
- JP
- Japan
- Prior art keywords
- main
- main girder
- tower
- stayed bridge
- girder
- 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
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims description 16
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000011372 high-strength concrete Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
Description
【発明の詳細な説明】 〔実 施 例］ この発明は斜張橋に関するものである。[Detailed description of the invention] 〔Example] This invention relates to a cable-stayed bridge.
斜張橋は立設した主塔から斜めに張出した斜材によって
主桁を吊下げるものである。従って第５図に示すように
斜材Ｃに作用する引張力にて、主桁すには主塔ａの近傍
部分に向かって圧縮力が作用することになる。Cable-stayed bridges have main girders suspended by diagonal members that extend diagonally from an erected main tower. Therefore, as shown in FIG. 5, the tensile force acting on the diagonal member C causes a compressive force to act on the main girder toward the vicinity of the main tower a.
このような圧縮力に抵抗するために、主桁に用いるコン
クリートを高強度のものにしたり、主桁断面を太き（し
たりする必要がある。In order to resist such compressive forces, it is necessary to use high-strength concrete for the main girder and to thicken the cross section of the main girder.
この発明は主桁に大きな強度を要求しない、施工の容易
な斜張橋を提供することを目的とする。The object of this invention is to provide a cable-stayed bridge that does not require large strength from the main girder and is easy to construct.
〔課題を解決するための手段］
この発明にかかる斜張橋は、主桁の主塔近傍部分に予め
引張力を与えておき、圧縮応力度を軽減するものである
。[Means for Solving the Problems] The cable-stayed bridge according to the present invention reduces compressive stress by applying tensile force in advance to a portion of the main girder near the main tower.
主桁の主塔から離れた位置にＰＣ鋼材を主桁の長手方向
に沿って配設する。このＰＣ鋼材に引張力を与え、主桁
の主塔近傍部分を左右から引張るようにして主塔近傍部
分に引張り応力を与えるものである。PC steel members are placed along the longitudinal direction of the main girder at a position away from the main tower. A tensile force is applied to this PC steel material, and the part of the main girder near the main tower is pulled from left and right, thereby applying tensile stress to the part near the main tower.
また主桁の主塔近傍部分にＰＣ鋼材を主桁の長手方向に
沿って配設する。このＰＣ鋼材に圧縮力を与えて、主桁
の主塔近傍部分に圧縮ＰＣ鋼材の伸びによって引張り応
力を発生させるものである。In addition, PC steel materials are installed along the longitudinal direction of the main girder in the vicinity of the main tower. Compressive force is applied to this PC steel material, and tensile stress is generated in the main girder near the main tower due to the elongation of the compressed PC steel material.
主桁の主塔近傍に予め引張り応力を発生させておくため
、主桁を吊下げたとき主桁の主塔近傍部分に作用する圧
縮応力を軽減する。Since tensile stress is generated in advance in the main girder near the main tower, compressive stress acting on the main girder near the main tower is reduced when the main girder is suspended.
〔実 施 例］
以下、図に示す一実施例に基づきこの発明の詳細な説明
する。[Example] The present invention will be described in detail below based on an example shown in the drawings.
第１図において１は主塔であって、この主塔１の左右か
ら張出された斜材２によって主桁３が吊下げられている
。In FIG. 1, 1 is a main tower, and a main girder 3 is suspended by diagonal members 2 extending from the left and right sides of the main tower 1.
主桁３の主塔１から離れた部分には、主桁３の長手方向
に沿ってＰＣ１ｉｉ材４が配されている。A PC1ii material 4 is disposed along the longitudinal direction of the main girder 3 at a portion of the main girder 3 away from the main tower 1.
このＰＣ１ｉｌ材４に引張力を与え、主桁３の主塔１近
傍部分を左右から引張る。ＰＣ鋼材４，４の主桁３の端
部から突出した部分をアンカーブロック５．５に連結す
る。このようにして主桁３の主塔１近傍部分に引張応力
を与える。A tensile force is applied to this PC1il material 4, and the portion of the main girder 3 near the main tower 1 is pulled from the left and right. The portions of the PC steel materials 4, 4 that protrude from the ends of the main girder 3 are connected to the anchor block 5.5. In this way, tensile stress is applied to the portion of the main girder 3 near the main tower 1.
このように主桁３の主塔１近傍部分に引張応力を与えて
おけば、主桁３の自重によって主塔１近傍部分に作用す
る圧縮応力を軽減することになる。従って主桁３の主塔
１近傍部分のコンクリ−１・を高強度にしたり、主桁断
面を太き（する必要がない。By applying tensile stress to the portion of the main girder 3 near the main tower 1 in this way, the compressive stress acting on the portion near the main tower 1 due to the own weight of the main girder 3 is reduced. Therefore, there is no need to make the concrete 1 of the main girder 3 near the main tower 1 high in strength or to thicken the cross section of the main girder.
第２図に示すのは他の実施例であって、主塔１．１間に
も主桁３の長手方向に沿ってＰＣ鋼材４を配し、引張力
を与えた場合である。FIG. 2 shows another embodiment, in which a prestressed steel material 4 is arranged between the main towers 1.1 along the longitudinal direction of the main girder 3, and a tensile force is applied.
第３図に示すのは他の発明を示すもので、主桁３の主塔
１近傍部分に主桁３の長手方向に沿ってＰＣ１ｉｉｌ材
４を配し、これに圧縮力を与えたものである。第４図は
その圧縮部を示すもので、ジヤツキ６によってコンプレ
ッションロッド７を押し、このコンプレッションロット
７によってＰＣ鋼材４を圧縮する。ナツト８を移動して
異形アンカーブート９に当接してＰＣ鋼材４を圧縮状態
で固定する。Figure 3 shows another invention, in which PC1iil material 4 is arranged along the longitudinal direction of the main girder 3 in the vicinity of the main tower 1, and compressive force is applied to it. be. FIG. 4 shows the compression part. A compression rod 7 is pushed by a jack 6, and the PC steel material 4 is compressed by this compression rod 7. The nut 8 is moved to come into contact with the irregularly shaped anchor boot 9 to fix the PC steel material 4 in a compressed state.
以上のようにＰＣ鋼材４を圧縮することによって、その
弾性による伸びによって主桁３の主塔１近傍部分に引張
応力が与えられることになる。この引張応力によって主
塔１近傍部分に発生する圧縮応力を軽減することができ
る。By compressing the PC steel material 4 as described above, tensile stress is applied to the portion of the main girder 3 near the main tower 1 due to its elastic elongation. This tensile stress can reduce the compressive stress generated in the vicinity of the main tower 1.
この発明は以上のような構成ををし、ＰＣ鋼材によって
主桁の主塔近傍部分に引張応力を与えるため、主桁の自
重によって主塔近傍部分に作用する圧縮応力を軽減する
ことができる。従ってコンクリ一トを高強度のものにし
たり、主桁断面を大きくする必要がなく、施工を安価に
し、且つ施工コストを低くすることができる。This invention has the above-described configuration, and since tensile stress is applied to the main girder near the main tower using the prestressed steel material, the compressive stress acting on the main girder near the main tower due to the weight of the main girder can be reduced. Therefore, there is no need to use high-strength concrete or to enlarge the cross section of the main girder, making it possible to reduce the construction cost.
第１図はこの発明にがかる斜張橋の一実施例の正面図、
第２図は他の実施例の正面図、第３図は他の発明にがか
る斜張橋の正面図、第４図は第３図の■部拡大断面図、
第５図は従来の斜張橋の正面図である。FIG. 1 is a front view of an embodiment of a cable-stayed bridge according to the present invention;
FIG. 2 is a front view of another embodiment, FIG. 3 is a front view of a cable-stayed bridge according to another invention, and FIG. 4 is an enlarged sectional view of the ■ part in FIG.
FIG. 5 is a front view of a conventional cable-stayed bridge.
Claims (2)
下げる斜張橋において、 主桁の主塔から離れた部分にＰＣ鋼材を主桁の長手方向
に沿って配設し、このＰＣ鋼材に引張力を与え、主桁の
主塔近傍部分を左右から引張るようにして主塔近傍部分
に引張り応力を与えたことを特徴とする斜張橋。(1) In a cable-stayed bridge where the main girder is suspended by diagonal members extending from an erected main tower, prestressing steel is placed along the longitudinal direction of the main girder in the part of the main girder that is away from the main tower. A cable-stayed bridge characterized in that a tensile force is applied to a prestressing steel material, and the part of the main girder near the main tower is pulled from left and right, thereby applying tensile stress to the part near the main tower.
る斜張橋において、 主桁の主塔近傍部分にＰＣ鋼材を主桁の長手方向に沿っ
て配設し、このＰＣ鋼材に圧縮力を与えて、主桁の主塔
近傍部分に圧縮ＰＣ鋼材の伸びによる引張応力を与えた
ことを特徴とする斜張橋。(2) In a cable-stayed bridge where the main girder is suspended by diagonal members extending from an erected main tower, prestressing steel is placed along the longitudinal direction of the main girder in the vicinity of the main tower, and this PC A cable-stayed bridge characterized by applying compressive force to the steel material and applying tensile stress due to the elongation of the compressed PC steel material to a portion of the main girder near the main tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14326788A JPH01312107A (en) | 1988-06-10 | 1988-06-10 | Cable stayed bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14326788A JPH01312107A (en) | 1988-06-10 | 1988-06-10 | Cable stayed bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01312107A true JPH01312107A (en) | 1989-12-15 |
| JPH0413487B2 JPH0413487B2 (en) | 1992-03-09 |
Family
ID=15334774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14326788A Granted JPH01312107A (en) | 1988-06-10 | 1988-06-10 | Cable stayed bridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01312107A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04228707A (en) * | 1990-04-25 | 1992-08-18 | Soc Centre D'etudes & De Realisation Routieres Scetauroute | Bridge equipped with deck and two or more towers, and constructing method therefor |
-
1988
- 1988-06-10 JP JP14326788A patent/JPH01312107A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04228707A (en) * | 1990-04-25 | 1992-08-18 | Soc Centre D'etudes & De Realisation Routieres Scetauroute | Bridge equipped with deck and two or more towers, and constructing method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0413487B2 (en) | 1992-03-09 |
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