JPH0280742A - Hybrid truss - Google Patents
Hybrid trussInfo
- Publication number
- JPH0280742A JPH0280742A JP22755388A JP22755388A JPH0280742A JP H0280742 A JPH0280742 A JP H0280742A JP 22755388 A JP22755388 A JP 22755388A JP 22755388 A JP22755388 A JP 22755388A JP H0280742 A JPH0280742 A JP H0280742A
- Authority
- JP
- Japan
- Prior art keywords
- truss
- lower chord
- chord member
- diagonal
- hybrid
- 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
- 238000005452 bending Methods 0.000 claims abstract description 5
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 16
- 239000010959 steel Substances 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000282376 Panthera tigris Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
Landscapes
- Rod-Shaped Construction Members (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、梁等の長い荷重支持部材であって下弦材に
ケーブルを使用したハイブリッドトラスに関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a hybrid truss that is a long load supporting member such as a beam and uses a cable as the lower chord member.
［従来の技術］
従来、水勾配を有するトラスは種々の長さの上下弦材を
予め曲げ加工し、上下弦材間の種々の長さの斜材で連結
するようにしていた。また、下弦材にケープを使用した
トラスとしては第９図および第１０図に示すように、鋼
管等の鋼材からなる上弦材２１とＨ形鋼等の鋼材からな
る下弦材２２を鋼管等からなるラチス材２３で連結した
トラス梁の下弦材２２に所定間隔でリプ２４を取付け、
このリプ２４を貫通して下弦材２２の全長にわたる長さ
のシース管２５内にＰＣ撚線のようなＰＣ鋼材２６を通
し、ＰＣ鋼材２６にプレストレスを導入したものが知ら
れている（特開昭６２−３７４９９号公報参照）。[Prior Art] Conventionally, in a truss having a water gradient, upper and lower chord members of various lengths are bent in advance, and the upper and lower chord members are connected by diagonal members of various lengths. In addition, as shown in FIGS. 9 and 10, a truss using a cape for the lower chord has an upper chord 21 made of a steel material such as a steel pipe, and a lower chord 22 made of a steel material such as an H-beam. Lips 24 are attached at predetermined intervals to the lower chord members 22 of the truss beams connected by lattice members 23,
It is known that a prestress is introduced into the PC steel material 26 by passing a PC steel material 26 such as a PC stranded wire through the lip 24 and into a sheath pipe 25 extending over the entire length of the lower chord member 22. (Refer to JP-A-62-37499).
［発明が解決しようとする課題］
前記従来の水勾配を有するトラ又は、上下弦材および斜
材の長さが様々で製作が煩雑であり、また予め種々の長
さの弦材をそれぞれ機械的曲げ加工を行って形を作り出
すので、その作業が非常に面倒で、かつ特定の曲率のト
ラス毎に異なった長さと異なった曲げ加工が必要で自由
でな曲率のトラスを容易に得ることが困難な問題点があ
り、また下弦材にケーブルを使用したトラスでは、Ｈ形
鋼等の下弦材を使用し、そのリブにＰＣ撚線のようなＰ
Ｃ鋼材を通した構成であり、下弦材自体の重量が大きい
ので下弦材の重量の大幅な軽量化には役立たず、またＨ
型鋼等の下弦材の両端部に圧縮力を加えることにより上
からかかる荷重で下弦材が垂れて伸びるのを防ぐことを
目的とするものであって、自由にトラスの曲率を変える
ことができない問題点があった。[Problems to be Solved by the Invention] The above-mentioned conventional tiger having a water gradient, upper and lower chord members and diagonal members have various lengths and are complicated to manufacture. The shape is created by bending, which is very laborious, and each truss with a specific curvature requires a different length and a different bending process, making it difficult to easily obtain a truss with a free curvature. In addition, in a truss that uses a cable for the lower chord, the lower chord such as H-beam steel is used, and the ribs have P
It has a structure that passes through C steel, and the weight of the lower chord itself is large, so it is not useful for significantly reducing the weight of the lower chord.
The purpose is to prevent the lower chord from sagging and elongating due to the load applied from above by applying compressive force to both ends of the lower chord, such as shaped steel, but the problem is that the curvature of the truss cannot be changed freely. There was a point.
この発明は、構造が簡単で軽量化が可能で自由に各種の
曲率のトラスを得ることを課題とするものである。The object of this invention is to provide a truss with a simple structure, light weight, and various curvatures.
［課題を解決するための手段］
前記の課題を解決するため、この発明は、一体向に連続
して曲げを伝える上弦材１とケーブルのみからなる下弦
材２との間を斜材３で連結したトラスの下弦材２にプレ
ストレスを導入したハイブリッドトラスの手段を講じる
ものである。[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention connects an upper chord member 1 that continuously transmits bending in one direction and a lower chord member 2 consisting of only a cable with a diagonal member 3. This is a hybrid truss method in which prestress is introduced into the lower chord member 2 of the truss.
［作 用］ この発明の作用を実施例を参照して説明する。[Work] The operation of this invention will be explained with reference to Examples.
−直線状をなす鋼管のような上弦材１とケーブルのみか
らなる下弦材２を、中央から両端に向って長さを短くし
た斜材３て連結し、下弦材２のケーブルを左右に引張る
ことにより下弦材２が一直線状となり、その張力により
上弦材１は鋼管のように一体的に連続した弦材であるの
で斜材３の長短に応じて第２図に示すように、滑らかに
上方へ湾曲する。この状態からさらに張力を加えてプレ
ストレスを与えると第３図および第４図に示すように、
上弦材１も下弦材２もともに湾曲しケーブルの張力を変
えることによってどのような形状にもすることができる
。- Connecting the upper chord member 1, which is a straight steel pipe, and the lower chord member 2, which is made only of cables, using diagonal members 3 whose lengths are shortened from the center toward both ends, and pulling the cable of the lower chord member 2 from side to side. As a result, the lower chord member 2 becomes a straight line, and due to its tension, the upper chord member 1, which is a continuous chord member like a steel pipe, smoothly moves upward according to the length of the diagonal member 3, as shown in Figure 2. curve. When prestress is applied by further applying tension from this state, as shown in Figures 3 and 4,
Both the upper chord member 1 and the lower chord member 2 are curved and can be formed into any shape by changing the tension of the cable.
［実施例］ この発明の実施例について図面を参照して説明する。[Example] Embodiments of the invention will be described with reference to the drawings.
第１図においで、鋼管等からなる上弦材１とケーブルか
らなる下弦材２が、上下弦材１．２の中央から左右に向
って長さを短くした複数の斜材３で連結されており、こ
の下弦材２のケーブルを左右に引張してプレストレスを
導入することによってハイブリッドトラスが構成されて
いる。In Fig. 1, an upper chord member 1 made of a steel pipe or the like and a lower chord member 2 made of a cable are connected by a plurality of diagonal members 3 whose lengths become shorter from the center of the upper and lower chord members 1.2 toward the left and right. A hybrid truss is constructed by pulling the cable of the lower chord member 2 left and right to introduce prestress.
第２図は、下弦材２に矢印のようにさらに張力を与えた
結果、下弦材２が直線状となり上弦材ｌは直線状から上
方へ押し上げられて弧状となった状態を示し、第３図に
示すように下弦材弦材２に矢印のようににさらにプレス
トレスを導入することによって上弦材１はさらに曲率を
増し、下弦材２の引張り量の如何によりトラスを第４図
に示すばか任意の形状にすることができる。Figure 2 shows a state in which, as a result of further applying tension to the lower chord 2 as shown by the arrow, the lower chord 2 becomes straight and the upper chord l is pushed upward from the straight line and becomes arcuate. As shown in Fig. 4, by further introducing prestress to the lower chord member 2 as shown by the arrow, the upper chord member 1 further increases the curvature, and depending on the amount of tension of the lower chord member 2, the truss can be made into an arbitrary shape as shown in Fig. 4. can be made into the shape of
第５図ないし第８図は下弦材２と斜材３との固定状態を
示すもので、第５図および第６図において、斜材３の下
端には下弦材２のケーブルを挟持するための湾曲凹部４
を有する支圧板５の一方を固着した取付は板６が固着さ
れており、支圧板５の湾曲凹部４を下弦材２０ケーブル
に当接し、その反対側から他方の支圧板５ａを当接して
高力ポルト７で締付けることにより、下弦材２と支圧板
５．５ａが摩擦力で固定される。5 to 8 show the fixed state of the lower chord member 2 and the diagonal member 3. In Figs. Curved recess 4
In the case of mounting one side of the bearing pressure plate 5 with the plate 6 fixed, the curved recess 4 of the bearing pressure plate 5 is brought into contact with the lower chord 20 cable, and the other bearing pressure plate 5a is brought into contact from the opposite side. By tightening the force port 7, the lower chord member 2 and the bearing plate 5.5a are fixed by frictional force.
第７図および第８図において、斜材３の下端は下弦材２
のケーブルを挿通さるせる挿通孔８を有し、その左右端
をより大径の拡大孔９とした円筒部材１０を固着した取
付は板１１が固着され１円筒部材１０の挿通孔８に下弦
材２を挿通した後くさび１２を拡大孔９に打込むことに
よって下弦材２と円筒部材１０とが摩擦力により固定さ
れる。In FIGS. 7 and 8, the lower end of the diagonal member 3 is connected to the lower chord member 2.
A plate 11 is fixed to the cylindrical member 10, which has an insertion hole 8 through which a cable is inserted, and enlarged holes 9 of a larger diameter are formed at the left and right ends of the cylindrical member 10. 2 and then drive the wedge 12 into the enlarged hole 9, whereby the lower chord member 2 and the cylindrical member 10 are fixed by frictional force.
［発明の効果］
この発明は、上弦材は１本の鋼管のような鋼材でよく、
また上下弦材を予め機械的に曲げておく必要もなく、下
弦材のケーブルを引張るだけで滑らかな曲線が形成でき
、種々の曲率のトラスとすることができ、また構造が簡
単で製作が容易であり、しかも下弦材としてＨ型鋼等の
鋼材でなくケブルのみであるので軽量化を図ることがで
き、かつ軽量化によってトラス全体の応力を低くできる
ので合理的な構造とすることができるとともに安価なト
ラスを得ることができる。[Effect of the invention] In this invention, the upper chord material may be a steel material such as a single steel pipe,
In addition, there is no need to mechanically bend the upper and lower chords in advance; smooth curves can be formed by simply pulling the cable of the lower chord, making it possible to create trusses with various curvatures, and the structure is simple and easy to manufacture. Furthermore, since only cables are used as the lower chord material instead of steel materials such as H-shaped steel, it is possible to reduce the weight, and by reducing the weight, the stress of the entire truss can be reduced, resulting in a rational structure and low cost. truss can be obtained.
第１図〜第８図は、この発明の実施例を示すもので、第
１図〜は第４図はそれぞれトラス全体の正面図、第５図
は一部の正面図、第６図はその側面図、第７図は一部の
正面図、第８図はその側面図、第９図および第１０図は
従来例を示すもので、第９図は一部の正面図、第１０図
はその側面図である。
１・・・上弦材、２・・・下弦材、３・・・斜材、５−
・・支圧板、８・・・挿通孔、１０・・・円筒部材、１
２・・・くさび。Figures 1 to 8 show examples of the present invention. Figures 1 to 4 are front views of the entire truss, Figure 5 is a front view of a portion of the truss, and Figure 6 is a front view of the entire truss. 7 is a partial front view, FIG. 8 is a side view, FIGS. 9 and 10 are conventional examples, FIG. 9 is a partial front view, and FIG. 10 is a partial front view. FIG. 1... Upper chord member, 2... Lower chord member, 3... Diagonal member, 5-
... Bearing plate, 8... Insertion hole, 10... Cylindrical member, 1
2... Wedge.
Claims (1)
ブルのみからなる下弦材（２）との間を斜材（３）で連
結したトラスの下弦材（２）にプレストレスを導入した
ハイブリッドトラス。 ２、斜材（３）の長さを中央から両端に向って短くした
請求項１記載のハイブリッドトラス。 ３、斜材（３）の下端に支圧板（５）を取付けて下弦材
（２）を挟持し圧着係止した請求項１記載のハイブリッ
ドトラス。 ４、斜材（３）の下端に円筒部材（１０）を取付けてそ
の挿通孔（８）に下弦材（２）を通し、くさび（１２）
で固定した請求項１記載のハイブリッドトラス。[Claims] 1. A lower chord member (2) of a truss in which an upper chord member (1) that integrally and continuously transmits bending and a lower chord member (2) consisting only of cables are connected by a diagonal member (3). ) Hybrid truss with prestress introduced. 2. The hybrid truss according to claim 1, wherein the length of the diagonal members (3) is shortened from the center toward both ends. 3. The hybrid truss according to claim 1, wherein a bearing plate (5) is attached to the lower end of the diagonal member (3), and the lower chord member (2) is clamped and crimped. 4. Attach the cylindrical member (10) to the lower end of the diagonal member (3), pass the lower chord member (2) through its insertion hole (8), and insert the wedge (12)
The hybrid truss according to claim 1, wherein the hybrid truss is fixed with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63227553A JP2614834B2 (en) | 1988-09-13 | 1988-09-13 | Hybrid truss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63227553A JP2614834B2 (en) | 1988-09-13 | 1988-09-13 | Hybrid truss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0280742A true JPH0280742A (en) | 1990-03-20 |
| JP2614834B2 JP2614834B2 (en) | 1997-05-28 |
Family
ID=16862708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63227553A Expired - Fee Related JP2614834B2 (en) | 1988-09-13 | 1988-09-13 | Hybrid truss |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2614834B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867393A (en) * | 2018-08-02 | 2018-11-23 | 中铁二院工程集团有限责任公司 | A kind of long-span continuous rigid-framed bridge external prestressing load system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6351540A (en) * | 1986-08-21 | 1988-03-04 | 清水建設株式会社 | Truss structure |
-
1988
- 1988-09-13 JP JP63227553A patent/JP2614834B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6351540A (en) * | 1986-08-21 | 1988-03-04 | 清水建設株式会社 | Truss structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867393A (en) * | 2018-08-02 | 2018-11-23 | 中铁二院工程集团有限责任公司 | A kind of long-span continuous rigid-framed bridge external prestressing load system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2614834B2 (en) | 1997-05-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |