JPH0321739A - Deflection control method for construction work with huge span - Google Patents
Deflection control method for construction work with huge spanInfo
- Publication number
- JPH0321739A JPH0321739A JP15461389A JP15461389A JPH0321739A JP H0321739 A JPH0321739 A JP H0321739A JP 15461389 A JP15461389 A JP 15461389A JP 15461389 A JP15461389 A JP 15461389A JP H0321739 A JPH0321739 A JP H0321739A
- Authority
- JP
- Japan
- Prior art keywords
- lower chord
- chord member
- construction work
- span
- control method
- 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
- 238000000034 method Methods 0.000 title claims description 15
- 238000010276 construction Methods 0.000 title abstract description 4
- 238000003466 welding Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
Landscapes
- Rod-Shaped Construction Members (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は大スパン架構の梁のたわみ制御方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for controlling deflection of beams in large-span structures.
（従来の技術〉
大スパン架構は屋内競技場、大型格納庫や工場等中間に
柱を設けない構造物に使用されている。(Prior art) Large span frames are used for structures that do not have intermediate columns, such as indoor stadiums, large hangars, and factories.
これらの構造物は１００ ｍ〜２００ｍの大スパンのト
ラス屋根型式の梁を両端で支持しているため、該梁が自
重及び屋根荷重等の鉛直荷重により下側にたわむという
問題があった。Since these structures support truss roof type beams with large spans of 100 m to 200 m at both ends, there is a problem in that the beams bend downward due to vertical loads such as their own weight and roof loads.
そこで、近年はこのたわみを制御する方法、すなわち第
３図及び第４図に示すような梁Ｍに「むくり」をつける
代表的な方法として以下の２つの方法が提案されている
．
まず第１は第３図に示すように、両柱３の脚柱部に互に
対向する内側への水平力Ｐを与えることによって梁Ｍに
実線で示すような「むくり」を与える方法．
第２は第４図に示すように梁Ｍの下弦材４に沿わせた高
張力鋼線（図示せず）を両端から緊張することにより梁
Ｍに実線で示すような「むくり」を与える方法である。Therefore, in recent years, the following two methods have been proposed as representative methods for controlling this deflection, that is, for adding "bulge" to the beam M as shown in Figs. 3 and 4. The first method, as shown in Figure 3, is to apply a horizontal force P to the pedestals of both columns 3 inwardly so that they face each other, thereby causing the beam M to ``bulge'' as shown by the solid line. Second, as shown in Figure 4, a high-tensile steel wire (not shown) placed along the lower chord 4 of the beam M is tensioned from both ends to give the beam M a "bulge" as shown by the solid line. It's a method.
（発明が解決しようとする課題）
しかしながら、上記の方法のうち第１の方法は水平力を
加えることによる移動作業と、大きな水平力を加えた状
態における固定作業とを必要とするため作業工程が煩雑
になるばかりでなく、柱脚部への水平力を与えるための
専用の反力装置が必要となり、さらに基礎が大型になる
といった問題があった。(Problem to be Solved by the Invention) However, the first method among the above methods requires moving work by applying a horizontal force and fixing work while applying a large horizontal force, so the work process is slow. Not only is this complicated, but it also requires a dedicated reaction force device to apply horizontal force to the column base, and there are also problems in that the foundation becomes large.
また第２の方法は高張力鋼線が梁に組み込まれるので、
自重が増加すると共にコストも嵩むといった問題があっ
た。In the second method, high-tensile steel wires are incorporated into the beam, so
There were problems in that the weight increased and the cost also increased.
本発明は、上記のような問題点に鑑みてなされたもので
あり、その目的は大スパン架構における梁に簡潔かつ安
価にむくりを与えることのできる大スパン架構のたわみ
制御方法を提供することである。The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a method for controlling deflection of a large-span frame, which can simply and inexpensively provide a deflection to a beam in a large-span frame. It is.
（課題を達成するための手段）
以上の課題を達成するための本発明の手段は、大スパン
架構の梁における下弦材を切離して空隙部を形成し、該
下弦材同志を引き寄せて連結することにより梁を鉛直上
方へ押し上げることを特徴とする大スパン架構のたわみ
制御方法に存する。(Means for Achieving the Object) The means of the present invention for achieving the above object is to cut off the lower chord members of the beams of a large span frame to form a gap, and connect the lower chord members by drawing them together. The invention consists in a method for controlling deflection of a large-span structure, which is characterized by pushing a beam vertically upward.
（作用）
而して上記のような構成によると、梁の下弦材同志を空
隙部に引き寄せて連結すると、下弦材の長さが連結前よ
り短くなることにより、該梁に上方への鉛直力が働くの
で上方向への「むくり」が発生する。(Function) According to the above configuration, when the lower chords of the beams are pulled together into the gap and connected, the length of the lower chords becomes shorter than before connection, which causes an upward vertical force to be applied to the beams. works, causing upward "bulking".
（実施例）
以下、本発明の一実施例を図而に基づいて詳細に説明す
る。(Example) Hereinafter, an example of the present invention will be described in detail based on the illustrations.
図中Ａは大スパンの鉄骨剛節架構であり、上弦材１ｂと
下弦材１ａと束材又は斜材で横成されたトラス状の梁１
の両端に柱２が接合して構成されている。この大スパン
架ｆｆ’ＩＡは構築現場で組立てられるか、或は他の箇
所で組立てて構築箇所に運搬するかは任意である。A in the figure is a large-span steel frame rigid frame, in which a truss-shaped beam 1 is made up of an upper chord member 1b, a lower chord member 1a, and a bundle or diagonal member.
The pillar 2 is connected to both ends of the pillar 2. This large span frame ff'IA may be assembled at the construction site, or it may be assembled at another location and transported to the construction location.
大スパン架構Ａは梁１の下弦材１ａが中央部で切離され
て空隙部ｎが形成され、該下弦材１ａはその空隙部ｎの
長さだけ下弦材１ａの長さを調整することができる。In the large span frame A, the lower chord 1a of the beam 1 is separated at the center to form a gap n, and the length of the lower chord 1a can be adjusted by the length of the gap n. can.
そして、下弦材１ａの間隙部ｎにおける端部同志を油圧
シリンダーやジャッキ等（図示せず〉により引き寄せて
連結部材（図示せず）を介してボルト又は溶接等により
連結することにより、下弦材１ａの長さが連結前より短
くなるので、第１図に示すように梁１に上方への鉛直力
が働いて「むくり」が生じ、梁１の自重及び屋根荷重等
によるたわみを制御することができる。Then, the ends of the lower chord member 1a in the gap n are pulled together using a hydraulic cylinder, a jack, etc. (not shown), and are connected by bolts, welding, etc. via a connecting member (not shown), thereby lowering the lower chord member 1a. Since the length of the beams becomes shorter than before they are connected, an upward vertical force acts on the beam 1, causing ``swelling'' as shown in Figure 1, and the deflection due to the beam 1's own weight and roof load is controlled. I can do it.
またこの下弦Ｎ １ ａの連結は上記のように梁１の両
端に柱２が取付けられたままで連結するものに限らず、
第２図に示すように下弦材１ａ同志を連結して「むくり
」を生じさせた後に柱２を連結してもよい。Furthermore, the connection of this lower chord N 1 a is not limited to the connection with the pillars 2 attached to both ends of the beam 1 as described above.
As shown in FIG. 2, the pillars 2 may be connected after connecting the lower chord members 1a to create a "bulge".
さらに上記下弦材１ａを切離する場所は中央部に限定さ
れず、何処であっても上記のような上方への鉛直力を梁
１に作用させることは可能である。Further, the location where the lower chord member 1a is cut off is not limited to the central portion, and it is possible to apply the above-mentioned upward vertical force to the beam 1 anywhere.
（発明の効果〉
本発明は以上の様な構成にしたことにより下記の効果を
有する。(Effects of the Invention) The present invention has the following effects by having the above configuration.
■ 大スパン架構の梁における下弦材を切離して空隙部
を形成し、該下弦材同志を中央部に引き寄せて連結する
ことにより下弦材の長さが連結前よりも短くなって、梁
に上方への鉛直力を働かせてむくりを生じせしめるので
、自重や屋根荷重等によるたわみを容易に制御すること
ができる。■ By separating the lower chord members of the beams of a large span frame to form a gap, and by pulling the lower chord members toward the center and connecting them, the length of the lower chord members becomes shorter than before connection, and the beams are forced upward. Since the vertical force is applied to cause bulging, deflection due to own weight, roof load, etc. can be easily controlled.
■ 下弦材西志を引き寄せて連結することにより下弦材
の長さが連結前よりも短くなるので、梁に特に大きな応
力が余分に生じることなく簡潔かつ経済的にたわみを制
御できる。■ By pulling the lower chord members together and connecting them, the length of the lower chord members becomes shorter than before they were connected, so deflection can be controlled simply and economically without creating any particularly large extra stress on the beam.
第１図及び第２図は本発明の大スパン架構のたわみ制御
方法の実施状況を示す正面図、第３図及び第４図は従来
の大スパン架構のたわみ制御方法の実施状況を示す正面
である。
Ａ：大スパン架構 １＝梁
１ａ：下弦材 ｎ：空隙部
２：柱Figures 1 and 2 are front views showing the implementation status of the deflection control method for a large span frame according to the present invention, and Figures 3 and 4 are front views showing implementation status of the conventional deflection control method for a large span frame. be. A: Large span frame 1 = Beam 1a: Bottom chord n: Gap 2: Column
Claims (1)
成し、該下弦材同志を引き寄せて連結することにより梁
を鉛直上方へ押し上げることを特徴とする大スパン架構
のたわみ制御方法。A method for controlling deflection of a large-span frame, which comprises separating the lower chord members of a beam of the large-span frame to form a gap, and pushing the beam vertically upward by drawing and connecting the lower chord members.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15461389A JPH0715180B2 (en) | 1989-06-19 | 1989-06-19 | Deflection control method for large span frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15461389A JPH0715180B2 (en) | 1989-06-19 | 1989-06-19 | Deflection control method for large span frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0321739A true JPH0321739A (en) | 1991-01-30 |
| JPH0715180B2 JPH0715180B2 (en) | 1995-02-22 |
Family
ID=15588015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15461389A Expired - Fee Related JPH0715180B2 (en) | 1989-06-19 | 1989-06-19 | Deflection control method for large span frame |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0715180B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233831A (en) * | 2022-08-19 | 2022-10-25 | 湖南建工集团有限公司 | Multi-point large-span space steel structure integral continuous lifting method with freely controlled deflection |
-
1989
- 1989-06-19 JP JP15461389A patent/JPH0715180B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233831A (en) * | 2022-08-19 | 2022-10-25 | 湖南建工集团有限公司 | Multi-point large-span space steel structure integral continuous lifting method with freely controlled deflection |
| CN115233831B (en) * | 2022-08-19 | 2023-09-15 | 湖南建工集团有限公司 | Integral continuous lifting method for multi-point large-span space steel structure with freely controlled deflection |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0715180B2 (en) | 1995-02-22 |
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