JPS5853870Y2 - steel pipe truss - Google Patents
steel pipe trussInfo
- Publication number
- JPS5853870Y2 JPS5853870Y2 JP1978137469U JP13746978U JPS5853870Y2 JP S5853870 Y2 JPS5853870 Y2 JP S5853870Y2 JP 1978137469 U JP1978137469 U JP 1978137469U JP 13746978 U JP13746978 U JP 13746978U JP S5853870 Y2 JPS5853870 Y2 JP S5853870Y2
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- regular hexagonal
- section
- cross
- joining member
- 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
Links
Landscapes
- Rod-Shaped Construction Members (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Description
【考案の詳細な説明】
この考案は石油掘削用ジヤツキアップリグ等の海洋構造
物その他に用いられる鋼管トラスに関するものである。[Detailed Description of the Invention] This invention relates to a steel pipe truss used in offshore structures such as jack up rigs for oil drilling.
従来、海洋構造物等の鋼管トラスの構成部材には断面が
丸形あるいは四角形の鋼管が多く使用されている。Conventionally, steel pipes with round or square cross sections have often been used as structural members of steel pipe trusses for offshore structures and the like.
しかし断面丸形の鋼管を使用する場合、同部材は表面に
曲率を有するためこれに直交あるいは斜交して溶接接合
される他部材の端部加工には特殊な設備が必要となり、
また溶接施工も複雑である。However, when using a steel pipe with a round cross section, the same member has a curvature on its surface, so special equipment is required to process the ends of other members that are welded orthogonally or obliquely to it.
Welding work is also complicated.
これに対し、断面四角形の鋼管を使用した場合、接合面
が平面となるため、これに接合される部材の端部加工は
簡単になる。On the other hand, when a steel pipe with a square cross section is used, the joining surface becomes a flat surface, so the end processing of the member to be joined thereto becomes easy.
しかし断面四角形の鋼管の場合、主部材接合面の面外曲
げ剛性が低いため接合部の性能（剛性および局部応力に
起因する疲労強度）が断面丸形の鋼管の場合に比べてか
なり低いという機能面での欠点がある。However, in the case of steel pipes with a square cross-section, the out-of-plane bending stiffness of the joint surfaces of the main members is low, so the joint performance (rigidity and fatigue strength due to local stress) is considerably lower than that of steel pipes with a round cross-section. There are some drawbacks in terms of aspects.
この考案は断面が正六角形断面の中空部材（以下、正六
角形鋼管という）を鋼管トラスの主部材として使用する
ことにより、断面四角形の鋼管の場合と同様の施工面の
利点を保持し、かつ接合部の剛性を高め、局部応力を低
減させて機能面での性質を向上させるものである。By using a hollow member with a regular hexagonal cross section (hereinafter referred to as a regular hexagonal steel pipe) as the main member of the steel pipe truss, this idea maintains the same construction advantages as steel pipes with a square cross section, and also This increases the rigidity of the parts, reduces local stress, and improves functional properties.
以下、この考案を図示した実施例に基づいて説明する。This invention will be explained below based on illustrated embodiments.
第１図はこの考案の鋼管トラスを石油掘削用のジヤツキ
アップリグ１に適用する場合の実施例を示したもので、
第２図はそのＡ−Ａ断面図となっている。Figure 1 shows an example in which the steel pipe truss of this invention is applied to a jack up rig 1 for oil drilling.
FIG. 2 is a sectional view taken along the line A-A.
図に示すように鋼管トラスの主部材としては断面が正六
角形で、各側面の断面が均一な厚さの中空部材である正
六角形鋼管２を用い、格点においてこの正六角形鋼管２
の相隣る２側面に接合部材３を溶接により接合しである
。As shown in the figure, the main member of the steel pipe truss is a regular hexagonal steel pipe 2, which is a hollow member with a regular hexagonal cross section and a uniform thickness on each side.
A joining member 3 is joined by welding to two adjacent side surfaces of.
しかもその接合部材３はその中心軸を含む鉛直平面が前
記正六角形鋼管２の接合面と垂直になるように接合しで
ある。Moreover, the joining member 3 is joined so that a vertical plane including its central axis is perpendicular to the joining surface of the regular hexagonal steel pipe 2.
鋼管２の断面は正六角形であり、隣接する接合部材３，
３は正六角形鋼管２の相隣る２側面において６０°の角
度で接合され、また主部材の接合面は各々の接合部材３
に対し垂直となっていて、施工的に最も有利である。The cross section of the steel pipe 2 is a regular hexagon, and the adjacent joining members 3,
3 are joined at an angle of 60° on two adjacent sides of the regular hexagonal steel pipe 2, and the joining surfaces of the main members are connected to each joining member 3.
It is perpendicular to the ground and is most advantageous in terms of construction.
また、この実施例においては接合部材３として、その外
径が正六角形鋼管２の一側面の巾と等しいものを用いて
いる。Further, in this embodiment, the joining member 3 used is one whose outer diameter is equal to the width of one side of the regular hexagonal steel pipe 2.
そしてこの場合、以下に述べるＴ形格点の解析結果より
、主部材として丸形鋼管を用いた格点よりも優れた断面
性能を示すことがわかる。In this case, it can be seen from the analysis results of the T-shaped case described below that the cross-sectional performance is superior to that of a case using a round steel pipe as the main member.
第３図は、最も基本的なＴ形格点の解析における載荷方
法を示したもので、第４図〜第６図はその解析結果（応
力状態）である。FIG. 3 shows the loading method in the most basic analysis of the T-shaped case point, and FIGS. 4 to 6 show the analysis results (stress state).
この解析では主部材の長さＬ＝１５００ｍｍ、板厚Ｔ＝
６ｍｍ、周長１ ＝ １０００ ｍｍ 、接合部材の径
ｄ１６７ｍｍ、載荷重Ｐ＝１ｔとし有限帯板法（Ｆｉｎ
ｉｔｅＳｔｒｉｐ Ｍｅｔｈｏｄ）あるいは円筒シェル
理論に基づいて計算している。In this analysis, the main member length L = 1500 mm, plate thickness T =
6 mm, circumference 1 = 1000 mm, joint member diameter d 167 mm, load P = 1 t, and the finite strip method (Fin plate method)
iteStrip Method) or cylindrical shell theory.
格点の局部応力については特にその最大応力が問題とな
り第４図〜第６図で明らがなように、正六角形鋼管の場
合が最も有利で、四角形鋼管が最も不利となる。Regarding the local stress at the case point, the maximum stress in particular becomes a problem, and as is clear from FIGS. 4 to 6, the case of a regular hexagonal steel pipe is the most advantageous, and the case of a square steel pipe is the most disadvantageous.
また剛性については丸形鋼管を用いた場合が５．４９
ｔｏｎ／ｍｍ 、四角形鋼管が２．２９ ｔｏｎ／ｍｍ
、正六角形鋼管が６．０７ ｔｏｎ／ｍｍで、やはり
正六角形鋼管が最も有利という結果になった。In addition, the rigidity is 5.49 when using round steel pipes.
ton/mm, square steel pipe is 2.29 ton/mm
, the regular hexagonal steel pipe was 6.07 ton/mm, and the result was that the regular hexagonal steel pipe was the most advantageous.
この考案は以上の構成からなり、主部材に正六角形鋼管
を用いることにより、四角形鋼管と同様施工が非常に容
易となり、かつ四角形鋼管と比較し、格点における剛性
、局部応力等の性能に関し著しい改善を計ることができ
、場合によっては円形鋼管よりも優れた性能を発揮する
。This invention consists of the above-mentioned structure, and by using a regular hexagonal steel pipe as the main member, it is very easy to construct just like a square steel pipe, and compared to a square steel pipe, it has remarkable performance in terms of rigidity at the case point, local stress, etc. It is possible to measure improvements, and in some cases, exhibits better performance than circular steel pipes.
また正六角形鋼管は波力や潮流に対しても抵抗が小さく
丸形鋼管同様の利点を有する。Furthermore, regular hexagonal steel pipes have the same advantages as round steel pipes, such as low resistance to wave forces and tidal currents.
第１図はこの考案の鋼管Ｉ・ラスを適用する石油掘削用
ジヤツキアップリグの正面図、第２図はそのＡ−Ａ断面
図、第３図はＴ形格点の解析における載荷方法を示す正
面図、第４図、第５図および第６図はその解析結果を示
す説明図である。
１・・・・・・ジヤツキアップリグ、２・・・・・・正
六角形鋼管、３・・・・・・接合部材、４・・・・・・
テ゛ツキ、５・・・・・・丸形鋼管、６・・・・・・四
角形鋼管。Figure 1 is a front view of a jack-up rig for oil drilling to which the steel pipe I lath of this invention is applied, Figure 2 is its A-A sectional view, and Figure 3 shows the loading method in the analysis of the T-shaped point. The front view shown, FIG. 4, FIG. 5, and FIG. 6 are explanatory diagrams showing the analysis results. 1...Jacket up rig, 2...Regular hexagonal steel pipe, 3...Joining member, 4...
5...Round steel pipe, 6...Square steel pipe.
Claims (2)
、この鋼管の相隣る２側面に接合部材を接合し、かつそ
の接合部材は格点においてその中心軸を含む鉛直平面が
前記六角形鋼管の接合面と垂直になるように接合しであ
ることを特徴とする鋼管トラス。(1) The main member is a regular hexagonal steel pipe with a uniform thickness in cross section, and a joining member is joined to two adjacent sides of this steel pipe, and the joining member has a vertical plane including its central axis at the case point. A steel pipe truss, characterized in that the hexagonal steel pipes are joined perpendicularly to the joint surfaces of the hexagonal steel pipes.
外径が等しい実用新案登録請求の範囲第１項記載の鋼管
トラス。(2) The steel pipe truss according to claim 1, in which the width of one side of the steel pipe having a regular hexagonal cross section is equal to the outer diameter of the joining member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978137469U JPS5853870Y2 (en) | 1978-10-06 | 1978-10-06 | steel pipe truss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978137469U JPS5853870Y2 (en) | 1978-10-06 | 1978-10-06 | steel pipe truss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5553118U JPS5553118U (en) | 1980-04-09 |
| JPS5853870Y2 true JPS5853870Y2 (en) | 1983-12-07 |
Family
ID=29109688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978137469U Expired JPS5853870Y2 (en) | 1978-10-06 | 1978-10-06 | steel pipe truss |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5853870Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7003380B2 (en) * | 2017-08-30 | 2022-01-20 | 株式会社竹中工務店 | 3D truss frame |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556889Y2 (en) * | 1971-12-28 | 1980-02-16 |
-
1978
- 1978-10-06 JP JP1978137469U patent/JPS5853870Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5553118U (en) | 1980-04-09 |
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