JPH03293477A - Skeleton construction method of long span girder - Google Patents
Skeleton construction method of long span girderInfo
- Publication number
- JPH03293477A JPH03293477A JP9507390A JP9507390A JPH03293477A JP H03293477 A JPH03293477 A JP H03293477A JP 9507390 A JP9507390 A JP 9507390A JP 9507390 A JP9507390 A JP 9507390A JP H03293477 A JPH03293477 A JP H03293477A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- long span
- column head
- truss
- weight
- 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.)
- Pending
Links
- 238000010276 construction Methods 0.000 title description 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- 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）
本発明は鉄骨梁と鉄骨またはコンクリート柱とで構成さ
れた長スパンの構造物における梁の架構方法に係るもの
である。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of constructing a beam in a long-span structure composed of a steel beam and a steel frame or concrete column.
（従来の技術）
従来、長スパン梁の架構は、鉄骨トラス梁と鉄骨または
コンクリート柱との接合部を剛として設計している。(Prior Art) Conventionally, long-span beam structures have been designed so that the joints between steel truss beams and steel frames or concrete columns are rigid.
（発明が解決しようとする課題）
前記従来の架構方法ではトラス粱自重及び仕上げ材重量
によってトラス梁中夫の応力及び変形が大きくなり、鉄
骨部材の量が多く、且つトラス背が高くなる。(Problems to be Solved by the Invention) In the conventional frame construction method described above, the stress and deformation of the truss beam core become large due to the weight of the truss frame and the weight of finishing materials, resulting in a large amount of steel members and a high truss height.
本発明は前記従来技術の有する問題点に鑑みて提案され
たもので、その目的とする処は、トラス梁の自重及び仕
上げ材重量による応力及び変形量を軽減する長スパント
ラス梁の架構方法に係るものである。The present invention has been proposed in view of the problems of the prior art, and its purpose is to provide a method for constructing long span truss beams that reduces stress and deformation due to the truss beam's own weight and the weight of finishing materials. It is something.
（課題を解決するための手段）
前記の目的を達成するため、本発明に係る長スパン梁の
架構方法は、長スパントラス梁を相対する柱の各柱頭部
にピン及びローラーで支持するとともに、同梁の端部を
柱頭部支持点より跳ね出し、次いで同跳ね出し端部に鋼
材を取付け、同鋼材を予め地中に埋設された永久反力体
に接合し、次しで前記鋼材に下向きの力を与えて前記ト
ラス梁にプレストレスを導入するものである。(Means for Solving the Problems) In order to achieve the above object, the method for constructing a long span beam according to the present invention includes supporting a long span truss beam on each column head of opposing columns with pins and rollers, and The end of the beam protrudes from the support point of the column head, then a steel member is attached to the protruding end, the steel member is connected to a permanent reaction body previously buried in the ground, and then a downward direction is attached to the steel member. A force is applied to introduce prestress into the truss beam.
（作用）
本発明によれば前記したように、相対する柱の柱頭部に
ピン、及びローラーで支持された長スパントラス梁にお
ける柱頭部支持点からの跳ね出し端部を、予め地中に埋
設された永久反力材との間に接合された鋼材に引張力を
与えることによって、前記長スパントラス梁にプレスト
レスを導入したことによって、前記梁に自重及び仕上げ
材による応力とは逆の応力が生起して、前記自重及び仕
上げ材による応力を減殺することとなって、前記長スパ
ン梁の架構における応力及び変形が小さくなるとともに
、柱には軸力のみが負担されることとなる。(Function) According to the present invention, as described above, in a long span truss beam supported by pins and rollers on the column heads of opposing columns, the protruding ends from the column head support points are buried in the ground in advance. By applying a tensile force to the steel material joined between the permanent reaction member and the permanent reaction member, a prestress is introduced into the long span truss beam, and a stress opposite to that due to its own weight and finishing material is generated in the beam. As a result, the stress due to the self-weight and the finishing material is reduced, and the stress and deformation in the long-span beam structure are reduced, and only the axial force is borne by the column.
（実施例） 以下本発明を図示の実施例について説明する。(Example) The present invention will be described below with reference to the illustrated embodiments.
（１）は長スパン鉄骨トラス梁で、鉄骨またはコンクリ
ート柱（２）（２’）上にピン及びローラーを介して支
持されるとともに、両端部が前記各柱頭部支持点より跳
ね出されている。(1) is a long-span steel truss beam that is supported on steel frames or concrete columns (2) (2') via pins and rollers, and both ends protrude from the support points of each column head. .
一方、地盤内には永久反力材とし′ζ例えばアースアン
カー（３）を埋設、定着しておく。（第１Ｍ参照）
次いで前記梁（１）の跳ね出し端部の下部に鋼材（４）
を取付け、同鋼材（４）の下端を前記アースアンカー（
３）に取付けたのち、（第２図参照）前記鋼材（４）に
下向きの力Ｔを与え、前記アースアンカー（３）に反力
をとることによって前記梁（１）にプレストレスを導入
する。（第３図参照）
前記したようにトラス梁（１）に鋼材（４）を介して下
向きの力Ｔを加えることによって、（第４図参照）その
曲げモーメント分布図は第５図に示す如くなり、一方、
架構には第６図に示す如き自重及び仕上げ材重量による
荷重Ｗで、第７図に示す如き曲げモーメント分布が生し
ている。On the other hand, a permanent reaction material such as an earth anchor (3) is buried and fixed in the ground. (See No. 1M) Next, a steel material (4) is attached to the lower part of the projecting end of the beam (1).
and attach the lower end of the steel material (4) to the earth anchor (
3), (see Figure 2) apply a downward force T to the steel member (4) and introduce a prestress to the beam (1) by taking a reaction force to the earth anchor (3). . (See Figure 3) As mentioned above, by applying a downward force T to the truss beam (1) via the steel member (4) (See Figure 4), the bending moment distribution diagram is as shown in Figure 5. On the other hand,
The frame has a bending moment distribution as shown in FIG. 7 due to the load W due to its own weight and the weight of finishing materials as shown in FIG. 6.
従って前記実施例に示す工法を採用することによって実
際に生じる応力は第５図と第７図に示す応力の和、即ち
第８図に示すようになり、梁のスパン中央部の曲げモー
メントＭｃが小さくなり、また第９圓に示すように前記
梁（１）のスパン中央部における撓み量δが小さくなる
。Therefore, the stress actually generated by adopting the construction method shown in the above embodiment is the sum of the stresses shown in Figs. 5 and 7, that is, as shown in Fig. 8, and the bending moment Mc at the center of the span of the beam is In addition, as shown in the ninth circle, the amount of deflection δ at the center of the span of the beam (1) becomes smaller.
なお第９図中、点線は従来の架構の変形を示す。Note that in FIG. 9, dotted lines indicate modifications of the conventional frame.
（発明の効果）
本発明によれば前記したように、柱間に一端をピン、他
端をローラーで支持された長スパントラス梁における支
持点からの跳ね出し端部と、予め地中に埋設された永久
反力材とを綱材で連結し、同鋼材に下向きの力を与えて
前記トラス梁にプレストレスを導入したことによって、
トラス梁の自重及び仕上げ材重量による応力並に変形を
小さくし、鉄骨部材量を節減し、トラス背を低くするこ
とができるとともに、柱は軸力を負担することとなり、
構造が簡略化されるものである。(Effects of the Invention) According to the present invention, as described above, in a long span truss beam supported between the columns by a pin at one end and a roller at the other end, the protruding end from the support point and the end portion buried in the ground in advance. By connecting the truss beam with a permanent reaction member using a rope and applying a downward force to the steel member, prestress is introduced into the truss beam.
It is possible to reduce the stress and deformation due to the truss beam's own weight and the weight of finishing materials, reduce the amount of steel components, and lower the truss height, while the columns bear the axial force.
The structure is simplified.
表部」の架構方法の一実施例の工程を示す正面図、第４
図及び第５図は夫々トラス梁の跳ね出し端部に下向きの
力を加えた状態、並にそのときにおける曲げモーメント
分布図、第６図及び第７区は夫々従来の架構に梁自重及
び仕上げ材自重が作用している状態、並にそのときにお
ける曲げモーメント分布図、第８図及び第９図は夫々本
発明の方法による架構の梁自重及び仕上げ材重量による
曲げモーメント分布図、並に変形図である。4th front view showing the process of one embodiment of the method for constructing the “front part”;
Figures 6 and 5 show the state in which a downward force is applied to the protruding end of the truss beam, and the bending moment distribution diagram at that time. Figures 6 and 7 show the beam weight and finish of the conventional frame, respectively. Figures 8 and 9 show the state in which the material's own weight is acting, and the bending moment distribution diagram at that time. Figures 8 and 9 show the bending moment distribution diagram and deformation due to the beam's own weight and finishing material weight, respectively, of the frame according to the method of the present invention. It is a diagram.
（１）・・・トラス梁、 （２）（２’＋・
・・柱、（３）・・・アースアンカー （４）・・
・鋼材、（５）・・・方杖。(1)...Truss beam, (2)(2'+・
...Pillar, (3)...Earth anchor (4)...
・Steel material, (5)...Steel.
Claims (1)
ラーで支持するとともに、同梁の端部を柱頭部支持点よ
り跳ね出し、次いで同跳ね出し端部に鋼材を取付け、同
鋼材を予め地中に埋設された永久反力体に接合し、次い
で前記鋼材に下向きの力を与えて前記トラス梁にプレス
トレスを導入することを特徴とする長スパン梁の架構方
法。A long span truss beam is supported by the column head pins and rollers of the opposing columns, and the end of the beam is protruded from the column head support point. Then, a steel material is attached to the protruding end, and the steel material is placed underground in advance. A method for constructing a long span beam, the method comprising: joining the steel member to a permanent reaction body buried in the truss beam, and then applying a downward force to the steel member to introduce prestress into the truss beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9507390A JPH03293477A (en) | 1990-04-12 | 1990-04-12 | Skeleton construction method of long span girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9507390A JPH03293477A (en) | 1990-04-12 | 1990-04-12 | Skeleton construction method of long span girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03293477A true JPH03293477A (en) | 1991-12-25 |
Family
ID=14127811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9507390A Pending JPH03293477A (en) | 1990-04-12 | 1990-04-12 | Skeleton construction method of long span girder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03293477A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63171947A (en) * | 1987-01-09 | 1988-07-15 | 鹿島建設株式会社 | Three-dimensional truss beam having prestress introduced thereinto |
| JPS6448947A (en) * | 1987-08-19 | 1989-02-23 | Daiwa House Ind | Rge span enclosure |
| JPH01190845A (en) * | 1988-01-27 | 1989-07-31 | Shimizu Corp | Trussed structure |
-
1990
- 1990-04-12 JP JP9507390A patent/JPH03293477A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63171947A (en) * | 1987-01-09 | 1988-07-15 | 鹿島建設株式会社 | Three-dimensional truss beam having prestress introduced thereinto |
| JPS6448947A (en) * | 1987-08-19 | 1989-02-23 | Daiwa House Ind | Rge span enclosure |
| JPH01190845A (en) * | 1988-01-27 | 1989-07-31 | Shimizu Corp | Trussed structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2003268878A (en) | Beam-column joint structure | |
| JPH03293477A (en) | Skeleton construction method of long span girder | |
| JP3646575B2 (en) | Temporary support method and temporary support device | |
| JP2516818B2 (en) | Frame method of long span beams | |
| JP2520304B2 (en) | Prestressed steel beam | |
| JP2001172913A (en) | Elevated bridge and its construction method | |
| RU2188915C1 (en) | Method of installation of prestressed strutted frame | |
| JP2671694B2 (en) | Composite beam | |
| JP2972962B2 (en) | Connection structure | |
| JP2926148B2 (en) | Joint structure of prestressed structure | |
| JPH11324111A (en) | Balance construction of steel framed beam | |
| JP2522710B2 (en) | Prestress introduction method for truss beams | |
| JP2838608B2 (en) | Connection structure of girder and steel beam | |
| JP3247749B2 (en) | Construction method of long span truss beams | |
| JPH09228655A (en) | Reinforcing structure of existing structure | |
| JPH0621474B2 (en) | Truss frame and construction method | |
| JPH03172426A (en) | Framing method for long span beam | |
| JPH0819715B2 (en) | Reinforced concrete column / beam joint reinforcement structure | |
| JP2926147B2 (en) | Building construction method | |
| JPS62178647A (en) | Prestressed truss girder | |
| SU1399435A1 (en) | Arrangement for reinforcing a ferroconcrete column | |
| JP2001123675A (en) | Temporary bracket jig and temporary bracket structure for building | |
| JPH0732642Y2 (en) | Beam-column joint structure | |
| JP2003074192A (en) | Seismic strengthening structure | |
| JPH05340002A (en) | Construction method for steel construction building with large outrigger girder |