JPH0413486B2 - - Google Patents
Info
- Publication number
- JPH0413486B2 JPH0413486B2 JP63143266A JP14326688A JPH0413486B2 JP H0413486 B2 JPH0413486 B2 JP H0413486B2 JP 63143266 A JP63143266 A JP 63143266A JP 14326688 A JP14326688 A JP 14326688A JP H0413486 B2 JPH0413486 B2 JP H0413486B2
- Authority
- JP
- Japan
- Prior art keywords
- main
- diagonal
- main girder
- tower
- 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.)
- Expired - Lifetime
Links
- 238000010276 construction Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011513 prestressed concrete 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〕 この発明は斜張橋に関するものである。[Detailed description of the invention] [Industrial application field] This invention relates to a cable-stayed bridge.
斜張橋は立設した主塔ａから斜めに張出した斜
材ｂによつて主桁ｃを吊上げるものである。従来
の斜張橋としては第４図及び第５図に示すものが
開発されている。
A cable-stayed bridge has a main girder c suspended by diagonal members b extending diagonally from an erected main tower a. As conventional cable-stayed bridges, those shown in FIGS. 4 and 5 have been developed.
すなわち主塔ａは下方から上端まで垂直に起立
するものであつて、この主塔ａの垂直な上部から
斜めに斜材を張出すものである。 That is, the main tower a stands vertically from the bottom to the top, and diagonal members are diagonally extended from the vertical top of the main tower a.
上記したような斜張橋は、主桁ｃから主塔ａ上
端までの高さｈに対し、主塔ａから斜材ｂの最到
達点までの長さｌは約２倍（2h）となつている。
従つて主桁ｃの吊り上げ力は、斜材ｂに張力Ｔを
導入したとしても、この張力Ｔの約1/2しか得る
ことができない。
In a cable-stayed bridge as described above, the length l from the main tower a to the highest point of the diagonal members b is approximately twice (2h) as the height h from the main girder c to the top of the main tower a. ing.
Therefore, even if the tension T is introduced into the diagonal members b, the lifting force of the main girder c can only be obtained by about 1/2 of this tension T.
従つて主桁ｃ吊上げるためには多くの斜材ｂが
必要となつて、施工の手間が増えるとともにコス
トが高くなつてしまう。 Therefore, in order to lift the main girder c, many diagonal members b are required, which increases the labor and cost of construction.
また斜材ｂの張力Ｔの多くは主桁ｃを主塔ａ方
向へ引張る力（水平分力）となり、主桁ｃの主塔
ａ近傍部分に大きな圧縮力が左右から作用するこ
とになる。従つて主桁ｃの主塔ａ近傍部分を、こ
の過大な圧縮応力に耐える構造としなければなら
ず、主桁ｃを高強度にするため、施工が大がかり
となつてコストが高くなつてしまう。 Further, most of the tension T of the diagonal member b becomes a force (horizontal force) that pulls the main girder c toward the main tower a, and a large compressive force acts on the portion of the main girder c near the main tower a from the left and right. Therefore, the portion of the main girder c near the main tower a must be constructed to withstand this excessive compressive stress, and in order to make the main girder c high in strength, construction becomes extensive and costs increase.
この発明は以上のような課題を解決するために
なされたもので、斜材の数を少なくし、主桁の構
造を簡単なものとして施工が容易であつて施工コ
ストの低い斜張橋を提供することを目的とする。 This invention was made to solve the above-mentioned problems, and provides a cable-stayed bridge that is easy to construct and has a low construction cost by reducing the number of diagonal members and simplifying the structure of the main girder. The purpose is to
この発明にかかる斜張橋は、主桁より上方の主
塔をＶ状をなす斜主材と斜主材の上部間を連結す
る主桁の長手方向と平行な連結材で構成し、この
主塔の主斜材から張出した斜材によつて主桁を吊
上げるものである。
In the cable-stayed bridge according to the present invention, the main tower above the main girder is composed of a V-shaped diagonal main member and a connecting member parallel to the longitudinal direction of the main girder that connects the upper part of the diagonal main member. The main girder is lifted by diagonals that extend from the main diagonal of the tower.
主塔の斜主材から主桁への連結部までの長さｌ
が短くなり、斜材の主桁に対する交差角度が大き
くなる。従つて斜材の引張力の水平分力が小さ
く、吊上げ力が大きくなる。
Length l from the diagonal main member of the main tower to the connection part to the main girder
becomes shorter, and the intersection angle of the diagonal members with respect to the main girder becomes larger. Therefore, the horizontal component of the tensile force of the diagonal member is small, and the lifting force is large.
よつて斜材の本数を少なくできるとともに、主
桁の強度を余り大きくしなくともよくなる。 Therefore, the number of diagonal members can be reduced, and the strength of the main girder does not need to be increased too much.
以下、図に示す一実施例に基づきこの発明を詳
細に説明する。
Hereinafter, the present invention will be explained in detail based on an embodiment shown in the drawings.
第１図において１は主塔であつて、主桁２より
も上方となる上部がＶ状をなす斜主材と斜主材の
上部間を連結する連結材３から構成されている。 In FIG. 1, reference numeral 1 denotes a main tower, which is composed of a diagonal main member whose upper part above the main girder 2 is V-shaped and a connecting member 3 that connects the upper part of the diagonal main member.
連結材は、主桁２の長手方向と平行で水平な
PC鋼材３が掛け渡されて、左右の斜材４，４の
引張力を受けている。 The connecting members are horizontal and parallel to the longitudinal direction of the main girder 2.
The PC steel material 3 is stretched across and receives the tensile force of the left and right diagonal members 4, 4.
主塔１の斜主材からは前述したように斜材４，
４が斜めに張出されている。このように主塔１上
部はＶ字形となつて主桁２の長手方向に張出して
おり、この張出した長さl′分、主塔１の斜材４張
出し部から主桁２の斜材４到達部までの長さｌが
短くなる。従つて斜材４の主桁２に対する角度が
大きくなつて、斜材４に生じる引張力の水平分力
が小さくなる。また、この引張力の垂直分力であ
る吊上げ力は大きくなる。 As mentioned above, from the diagonal main material of the main tower 1, the diagonal material 4,
4 is extended diagonally. In this way, the upper part of the main tower 1 has a V-shape and overhangs in the longitudinal direction of the main girder 2, and the diagonal member 4 of the main girder 2 The length l to the reaching part becomes shorter. Therefore, the angle of the diagonal member 4 with respect to the main girder 2 becomes larger, and the horizontal component of the tensile force generated in the diagonal member 4 becomes smaller. Moreover, the lifting force, which is the vertical component of this tensile force, increases.
このように吊上げ力が大きくなれば、斜材４の
本数が少なくとも、所要の吊上げ力が得られ、ま
た主桁２の主塔１近傍部分に作用する圧縮力が小
さくなり、主桁２の強度を大きくする必要がな
い。 If the lifting force is increased in this way, the required lifting force can be obtained even if the number of diagonal members 4 is at least, and the compressive force acting on the main girder 2 near the main tower 1 is reduced, which increases the strength of the main girder 2. There is no need to make it larger.
この発明は、その他前記Ｖ字形の主塔１の連結
材３は、PC鋼材の代わりに、第２図に示すよう
にプレストレストコンクリート梁５を設けてもよ
い。 In addition, in this invention, the connecting member 3 of the V-shaped main tower 1 may be provided with a prestressed concrete beam 5, as shown in FIG. 2, instead of using prestressed steel.
また第３図に示すように、主塔１は上方部分を
二股状に分割し、その各々をＶ字形とし、この二
本の平行なＶ字形部６，６か斜材４を張出し、主
桁２を二面吊りしてもよい。 Further, as shown in Fig. 3, the upper part of the main tower 1 is divided into two parts, each of which is V-shaped, and the two parallel V-shaped parts 6, 6 or diagonal members 4 are overhanging the main girder. 2 may be hung on two sides.
この発明は以上のような構成を有し、主桁より
上方の主塔をＶ状をなす斜主材と斜主材上部間を
連結する主桁の長手方向と平行な連結材で構成
し、この主塔の主斜材から張出した斜材と主桁と
の交差角度が従来のものより大きくなり、斜材の
引張力の水平分力が小さく、主桁に作用する圧縮
応力が小さくなつて且つ吊上げ力が大きくなる。
従つて斜材の本数を少なくすることができるとと
もに、主桁の強度を余り大きくする必要がなく、
施工が容易となり、施工コストを低くすることが
できる。
This invention has the above-mentioned configuration, and the main tower above the main girder is composed of a V-shaped diagonal main member and a connecting member parallel to the longitudinal direction of the main girder that connects the upper part of the diagonal main member, The intersection angle between the diagonal members protruding from the main tower's main girder and the main girder is larger than that of the previous model, the horizontal component of the diagonal's tensile force is smaller, and the compressive stress acting on the main girder is reduced. Moreover, the lifting force increases.
Therefore, the number of diagonals can be reduced, and there is no need to increase the strength of the main girder.
Construction becomes easier and construction costs can be lowered.
第１図はこの発明にかかる斜張橋の一実施例の
斜視図、他２図及び第３図は他の実施例の主塔部
分の斜視図、第４図は従来の斜張橋の斜視図、第
５図はその側面図である。
１……主塔、２……主桁、３……PC鋼材、４
……斜材。
Fig. 1 is a perspective view of one embodiment of a cable-stayed bridge according to the present invention, other 2 and 3 are perspective views of the main tower portion of other embodiments, and Fig. 4 is a perspective view of a conventional cable-stayed bridge. FIG. 5 is a side view thereof. 1...Main tower, 2...Main girder, 3...PC steel material, 4
... diagonal material.
Claims (1)
斜張橋において、主桁より上方の主塔をＶ状をな
す斜主材と斜主材上部間を連結する主桁の長手方
向と平行な連結材で構成し、この主塔の斜主材か
ら張出した斜材によつて主桁を吊り上げてあるこ
とを特徴とする斜張橋。1 In a cable-stayed bridge where the main girder is lifted by diagonal members extending from the main tower, the main girder connecting the main tower above the main girder with the V-shaped diagonal main member and the upper part of the diagonal main member in the longitudinal direction A cable-stayed bridge characterized by comprising connecting members parallel to the main tower and having a main girder suspended by the diagonal members extending from the main diagonal member of the main tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14326688A JPH01312106A (en) | 1988-06-10 | 1988-06-10 | Cable stayed bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14326688A JPH01312106A (en) | 1988-06-10 | 1988-06-10 | Cable stayed bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01312106A JPH01312106A (en) | 1989-12-15 |
| JPH0413486B2 true JPH0413486B2 (en) | 1992-03-09 |
Family
ID=15334749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14326688A Granted JPH01312106A (en) | 1988-06-10 | 1988-06-10 | Cable stayed bridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01312106A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100614455B1 (en) * | 2004-08-30 | 2006-08-21 | 주식회사 진화기술공사 | Extradosed Bridge and it's construction method |
| JP5267805B2 (en) * | 2009-04-30 | 2013-08-21 | 邦夫 本間 | Crimp connection method through bridge cross beams |
| CN105603858B (en) * | 2016-03-14 | 2017-11-03 | 广西大学 | Batter post bridge |
-
1988
- 1988-06-10 JP JP14326688A patent/JPH01312106A/en active Granted
Non-Patent Citations (3)
| Title |
|---|
| CABLE SUPPORTED BRIDGES CONCEPT AND DESIGN lÞibýggÐcÞÐc-ibfhn±lib-=1990 * |
| CABLE SUPPORTED BRIDGES CONCEPT AND DESIGN=1983 * |
| CONSTRUCTION AND DESIGN OF CABLE-STAYED BRIDGES=1986 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01312106A (en) | 1989-12-15 |
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