JP2004197516A - Panel point structure of steel truss web prestressed concrete bridge - Google Patents

Panel point structure of steel truss web prestressed concrete bridge Download PDF

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JP2004197516A
JP2004197516A JP2002370027A JP2002370027A JP2004197516A JP 2004197516 A JP2004197516 A JP 2004197516A JP 2002370027 A JP2002370027 A JP 2002370027A JP 2002370027 A JP2002370027 A JP 2002370027A JP 2004197516 A JP2004197516 A JP 2004197516A
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truss
steel
gusset plates
point structure
bridge
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JP3866194B2 (en
Inventor
Hirofumi Takenaka
裕文 竹中
Katsuhiro Hirami
勝洋 平見
Norio Terada
典生 寺田
Junji Honma
淳史 本間
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HALTEC KK
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HALTEC KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a panel point structure of a steel truss web prestressed concrete bridge for making a joint part of a truss material compact. <P>SOLUTION: In this panel point structure of the steel truss web prestressed concrete bridge, concrete upper and lower floor slabs A, A' are connected to each other by a web B of the steel truss. A pair of front and rear gusset plates 2, 2', 3, 3' are secured opposite to the peripheries of the steel pipes to the compression side truss material 1 and the tension side truss material 1' formed of a steel pipe, and the paired front and rear gusset plates of the compression side truss material and the paired front and rear gusset plates are respectively joined into one body through a splice plate 4 by a high tension bolt 5. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、コンクリート製の上・下床版を鋼トラスのウエブで連結した鋼トラスウエブＰＣ橋の格点構造に関し、詳しくはコンクリート桁内部に埋め込み定着する格点構造に関する。
【０００２】
【従来の技術】
鋼トラスウエブＰＣ橋は、主桁の上・下床版にコンクリート、ウエブに鋼トラスを用いた構造で、従来のコンクリート橋に比べて自重の軽減やスパンの長大化が可能である。
この鋼トラスウエブＰＣ橋において、その格点部（鋼トラスを構成するトラス材（斜材）の接合部）はコンクリート部材と鋼部材を一体化して、且つ断面力の伝達機構となる構造上重要な部分である。
【０００３】
そして、コンクリートと鋼トラス材の格点構造として、従来、図７に示すようなガセット格点構造が提案されている。
このガセット格点構造は、コンクリート桁１５内部にガセットプレート１６を埋め込み、そのガセットプレート１６に圧縮側トラス材１７と引張側トラス材１８を高力ボルト１９で摩擦接合した構造である。２０はガセットプレート１６に溶植したスタッドで、コンクリートとの定着が図られている。
具体的には、トラス材の周面に、ガセットプレートとの接合面積を増大する為の補助プレートを溶接し、その補助プレート及びトラス材を前後２枚のガセットプレートで挟み、ガセットプレートとトラス材及びガセットプレートと補助プレートを夫々高力ボルトで摩擦接合（締着）したものである（例えば、非特許文献１参照。）。
【０００４】
【非特許文献１】
「プレストレストコンクリート」社団法人プレストレスコンクリート技術協会発行、１９９９年３月 Ｖｏｌ．４１、Ｎｏ．２、Ｐ４１〜４７
【０００５】
【発明が解決しようとする課題】
しかしながら、上記した従来のガセット格点構造は、トラス材をガセットプレートで挾着し、ボルト接合する為、トラス材はガセットプレートと面接合する表面を備えた角型鋼管でなければならないという制約がある。
又、トラス材をガセットプレートに接合する為、トラス材の角度調整が困難である。
更に、トラス橋の規模に応じて様々な大きさのガセットプレートが必要となり、施工効率が悪いという問題を有する。
また、ガセットプレートにおけるトラス材のボルト接合箇所は、コンクリートから露出した部分である為、ガセットプレートの露出部分は塗装処理が必要になる。
以上のような結果、格点部は大型化するという問題点を有する。
【０００６】
本発明は、上記した従来の技術が有する問題点に鑑みてなされたもので、その目的とするところは、格点のコンパクト化を図ることができる格点構造を提供することにある。
【０００７】
【課題を解決するための手段】
上記目的を達成する為に本発明が講じた技術的手段は、コンクリート製の上・下床版を、鋼トラスのウエブで連結した鋼トラスウエブＰＣ橋における格点構造であって、鋼管で構成した圧縮側トラス材及び引張側トラス材のそれぞれ端部に、前後一対のガセットプレートを該鋼管の周囲に相対峙して固着し、その圧縮側トラス材の前後一対のガセットプレートと引張側トラス材の前後一対のガセットプレートを、それぞれ添接板を介し高力ボルトで接合一体化したことを特徴とする（請求項１）。
上記の圧縮側及び引張側のトラス材は、ガセットプレートを固着するため、丸型鋼管、角型鋼管の何れでもよい。
上記構成により、圧縮側トラス材及び引張側トラス材に夫々固着したガセットプレートは２面摩擦による高力ボルト接合される。それにより、格点をコンパクト化でき、因って、ガセットプレートをコンクリート桁内部に埋設することができる。
また、実測値を反映した添接板（高力ボルトの取付孔の位置）を製作することで、架設時におけるトラス材の角度調整が可能となる。
【０００８】
又、上記圧縮側トラス材及び引張側トラス材を構成する鋼管として丸型鋼管を用い、その丸型鋼管に対する前後一対のガセットプレートの固着は、該鋼管の周壁を側端部から軸心に沿って所定長さ切欠き、その切欠き部に、ガセットプレートに一体に形成した取付突片を接合溶接して固着するとよい（請求項２）。
この構成により、トラス材が丸型鋼管であってもガセットプレートを強固に固着できる。
【０００９】
更に、上記前後一対のガセットプレートの取付突片間に挟まれた丸型鋼管の周壁に、橋軸方向に配置する鉄筋を貫通配置する貫通孔を開設してもよい（請求項３）。
この構成により、橋軸方向の鉄筋の配置に加えて、トラス材（鋼管）へのコンクリートの充填性を向上できる。
【００１０】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
図１は、鋼トラスウエブＰＣ橋を示す外観図で、主桁のコンクリート製上・下床版Ａ，Ａ’が、鋼トラスのウエブＢで連結されており、且つウエブＢを構成する鋼トラス材の格点部はコンクリートに埋設されている。
【００１１】
図２は、上床版側の格点構造を示す斜視図で、ウエブＢを構成する鋼トラスは、丸型鋼管からなる圧縮側トラス材１と引張側トラス材１’を略Ｖ字形に組み合わせ、その接合部、即ち格点部は前記圧縮側トラス材１及び引張側トラス材１’の側部前後一対のガセットプレート２，２’、３，３’が溶接固定され、その前後一対のガセットプレート２，２’、３，３’が添接板４を介し高力ボルト５で摩擦接合されている。
【００１２】
丸型鋼管の圧縮側トラス材１と引張側トラス材１’に対するガセットプレート２，２’、３，３’の溶接固定は、図５に示すように、丸型鋼管の軸心方向の側部周壁に略Ｕ字状の切欠き部６を相対峙して形成する。尚、前記切欠き部６の形成は、周壁を擦り切ることで形成でき、擦り切りの深さは溶接するガセットプレートの板厚とする。
他方、前後一対のガセットプレート２，２’、３，３’は鋼板で形成され、そのガセットプレートの一側に、上記トラス材１，１’の側部に形成した切欠き部６に嵌合合致する取付突片７を同一体に突出形成する。
そして、前後一対のガセットプレート２，２’、３，３’に連設形成した取付突片７を、圧縮側トラス材１と引張側トラス材１’の切欠き部６に嵌め込み、接合部を溶接することで両者は強固に一体となる。即ち、上記したようにトラス材の周壁に形成した切欠き部６にガセットプレート２，２’、３，３’側の取付突片７を嵌め込んで溶接する為、両部材の溶接面積は広くなり、しかも面同士の接合で溶接でき、更に丸型鋼管の表面と取付突片の表面を面一に連設できる。尚、取付突片７の先端部をＲ面に加工し、トラス材側の切欠き部６の形状も同様にＲ加工することで、耐疲労性を考慮することができる。
【００１３】
又、上記ガセットプレート２，２’、３，３’には、高力ボルト５を挿通するための通孔８が格子状に多数開設されており、更に貫通鉄筋１０を配筋するための孔あき鋼板ジベル（略称：ＰＢＬジベル）９が一体に形成されている。
【００１４】
圧縮側トラス材１の前後一対のガセットプレート２，２’と引張側トラス材１’の前後一対のガセットプレート３，３’を高力ボルト５で摩擦接合する添接板４は、圧縮側トラス材１のガセットプレート２，２’と引張側トラス材１’のガセットプレート３，３’に跨る大きさに形成し、その面内には高力ボルト５を通す取付孔１１がガセットプレートの通孔８同様、格子状に開設されている。尚、前記取付孔１１の開設位置は、実測値を反映して製作することで、架設時におけるトラス材の角度調整が可能となる。
【００１５】
又、上記した圧縮側トラス材１と引張側トラス材１’における前後一対のガセットプレート２，２’、３，３’の取付突片７間に挟まれたトラス材（丸型鋼管）の周壁には、貫通孔１２が開設されている。この貫通孔１２は、コンクリート製の上・下床版Ａ、Ａ’内に橋軸方向に沿って配置する鉄筋１３やＰＣケーブル（図示省略）を挿通すると共に、トラス材へのコンクリートの充填性を高めることができる。
【００１６】
上記した格点構造により、圧縮側トラス材１と引張側トラス材１’に固着した前後一対のガセットプレート２，２’、３，３’は、それぞれ添接板４で挾着され、高力ボルトで締着されるため、二面摩擦接合となり、格点部をコンパクトに構成することができる。それにより、前記格点部はコンクリート１４内に埋め込むことができる。
また、上記したように格点部全体をコンクリート内に埋設できるため、従来のガセットプレートとトラス材の接合箇所が露出した構成に対して、トラス材の塗装面積（露出部分の塗装面積）を少なくすることができ、経済的効果も期待できる。
【００１７】
図６は、本発明の格点構造の変形応用例を示す図である。上記した実施の形態は、鋼トラスのウエブはコンクリート製の上・下床版を連結しているが、鋼トラスのウエブを、鋼材からなる上・下弦材に連結固定してもよい。
図示するように、鋼材で構成した上弦材Ｃの下面側の前後に添接板２１，２１’を一体的に連設形成し、その前後の添接板２１，２１’間に、前示実施例で示したと同様の構成のトラス材、即ち、ガセットプレート２２を溶接した圧縮側トラス材（丸型鋼管）２３と、ガセットプレート２４を溶接した引張側トラス材（丸型鋼管）２５の各ガセットプレートを差し込み、ガセットプレート２２、２４の内側に添接板２６を接合し、高力ボルト２７で摩擦接合する。これにより、圧縮側トラス材２３のガセットプレート２２と、引張側トラス材２５のガセットプレート２４は夫々添接板で挾着される。
上記構成により、上・下弦材に連結するトラス材に丸型鋼管を使用することが可能となる。尚、上・下弦材は、コンクリート製の床版に埋設しても、或いは部分的に埋設するなど任意である。
【００１８】
尚、本発明は上記した実施の形態に限定されるものではなく、発明の要旨を変えない範囲で変更可能である。
（１） 丸型鋼管のトラス材に対するガセットプレートの溶接は、トラス材に摺り割りを施さずに、ガセットプレートの裏面に受け座を取り付けて溶接してもよい。
（２） トラス材は角型鋼管でもよい。
【００１９】
【発明の効果】
本発明の鋼トラスウエブＰＣ橋の格点構造は請求項１記載の構成により、２面摩擦高力ボルト接合とすることができ、それにより格点部を従来構造に比べてコンパクト化することができる。従って、格点部をコンクリート内に埋め込むことが可能となり、コンクリート部材と鋼部材の一体化を強固に行うことができる。
又、請求項２記載の構成により、トラス材が丸型鋼管であってもガセットプレートを強固に固着できる。因って、従来の角型鋼管使用のガセット格点構造に比較し、一般的な丸型鋼管を使用できるため、経済的に有利である。
更に請求項３記載の構成により、橋軸方向の鉄筋の配置に加えて、トラス材（鋼管）へのコンクリートの充填性を向上でき、コンクリート部材と鋼部材の一体化をより一層強固にすることができる。
【図面の簡単な説明】
【図１】本発明に係る鋼トラスウエブＰＣ橋の外観を示す斜視図である。
【図２】格点構造部分を示す拡大斜視図である。
【図３】格点部の拡大平面図である。
【図４】図２の（４）−（４）線に沿える拡大断面図である。
【図５】格点部を構成する部材の分解斜視図である。
【図６】本発明の格点構造の変形応用例を示す斜視図である。
【図７】従来のガセット格点構造を示す正面図である。
【符号の説明】
Ａ，Ａ’…上・下床版 Ｂ…ウエブ（鋼トラス）
１…圧縮側トラス材 １’…引張側トラス材
２，２’…ガセットプレート ３，３’…ガセットプレート
４…添接板 ５…高力ボルト
６…切欠き部 ７…取付突片
１２…貫通孔[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a point structure of a steel truss web PC bridge in which concrete upper and lower slabs are connected by a steel truss web, and more particularly to a point structure embedded and fixed in a concrete girder.
[0002]
[Prior art]
The steel truss web PC bridge has a structure in which concrete is used for the upper and lower slabs of the main girder and steel trusses are used for the web, and can reduce its own weight and lengthen the span as compared with a conventional concrete bridge.
In this steel truss web PC bridge, the point (the joint of the truss material (diagonal material) constituting the steel truss) is a structurally important material that integrates the concrete member and the steel member and serves as a mechanism for transmitting the section force. Part.
[0003]
As a point structure of concrete and steel truss members, a gusset point structure as shown in FIG. 7 has been conventionally proposed.
The gusset point structure has a structure in which a gusset plate 16 is embedded in a concrete girder 15, and a compression-side truss member 17 and a tension-side truss member 18 are friction-bonded to the gusset plate 16 with high-strength bolts 19. Numeral 20 denotes studs which are implanted in the gusset plate 16 and are fixed to concrete.
Specifically, an auxiliary plate for increasing the joint area with the gusset plate is welded to the peripheral surface of the truss material, and the auxiliary plate and the truss material are sandwiched between two front and rear gusset plates. In addition, the gusset plate and the auxiliary plate are each friction-joined (tightened) with high-strength bolts (for example, see Non-Patent Document 1).
[0004]
[Non-patent document 1]
"Prestressed Concrete" Published by Japan Prestressed Concrete Technology Association, March 1999, Vol. 41, no. 2, P41-47
[0005]
[Problems to be solved by the invention]
However, in the conventional gusset point structure described above, the truss material is sandwiched between the gusset plates and bolted, so there is a restriction that the truss material must be a square steel pipe having a surface to be surface-connected to the gusset plate. is there.
Also, since the truss material is joined to the gusset plate, it is difficult to adjust the angle of the truss material.
Further, gusset plates of various sizes are required according to the scale of the truss bridge, and there is a problem that construction efficiency is poor.
Further, since the truss material bolted portion of the gusset plate is a portion exposed from the concrete, the exposed portion of the gusset plate needs to be painted.
As a result, there is a problem that the rating part becomes large.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the related art, and an object of the present invention is to provide a point structure that can achieve a compact point.
[0007]
[Means for Solving the Problems]
The technical means taken by the present invention to achieve the above object is a point structure in a steel truss web PC bridge in which concrete upper and lower floor slabs are connected by steel truss webs, and is constituted by steel pipes. A pair of front and rear gusset plates are fixed to the ends of the compression side truss member and the tension side truss member, respectively, so as to face each other around the steel pipe. A pair of front and rear gusset plates are joined and integrated with high-strength bolts via respective attachment plates (claim 1).
The truss material on the compression side and the tension side may be either a round steel pipe or a square steel pipe for fixing the gusset plate.
With the above configuration, the gusset plates fixed to the compression-side truss member and the tension-side truss member, respectively, are joined by high-strength bolts by two-sided friction. This makes it possible to make the case compact and thus bury the gusset plate inside the concrete girder.
In addition, by manufacturing the attachment plate (position of the mounting hole for the high-strength bolt) reflecting the actually measured value, the angle of the truss material can be adjusted at the time of erection.
[0008]
Further, a round steel pipe is used as a steel pipe constituting the compression-side truss material and the tension-side truss material, and a pair of front and rear gusset plates are fixed to the round steel pipe by enclosing the peripheral wall of the steel pipe from the side end along the axis. It is preferable that a notch of a predetermined length is attached to the notch, and a mounting projection formed integrally with the gusset plate is fixed to the notch by welding.
With this configuration, even if the truss material is a round steel pipe, the gusset plate can be firmly fixed.
[0009]
Furthermore, a through-hole may be formed in the peripheral wall of the round steel pipe sandwiched between the mounting projections of the pair of front and rear gusset plates so as to penetrate a reinforcing bar arranged in the bridge axis direction.
With this configuration, in addition to the arrangement of the reinforcing bars in the bridge axis direction, the filling property of the truss material (steel pipe) with concrete can be improved.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external view showing a steel truss web PC bridge, in which concrete upper and lower floor slabs A and A ′ of a main girder are connected by a steel truss web B, and a steel truss material constituting the web B The point of is buried in concrete.
[0011]
FIG. 2 is a perspective view showing the point structure on the upper floor slab side. The steel truss constituting the web B is a combination of a compression truss member 1 made of a round steel pipe and a tension truss member 1 ′ in a substantially V-shape. A pair of gusset plates 2, 2 ′, 3, 3 ′ at the front and rear sides of the compression-side truss member 1 and the tension-side truss member 1 ′ are welded and fixed at the joint portion, that is, the point portion, and a pair of gusset plates at the front and rear sides are fixed. 2, 2 ', 3 and 3' are friction-joined with a high-strength bolt 5 via an attachment plate 4.
[0012]
As shown in FIG. 5, the gusset plates 2, 2 ', 3, 3' are welded and fixed to the compression-side truss member 1 and the tension-side truss member 1 'of the round steel pipe, as shown in FIG. A substantially U-shaped notch 6 is formed on the peripheral wall so as to face each other. The notch 6 can be formed by scraping the peripheral wall, and the depth of the scraping is determined by the thickness of the gusset plate to be welded.
On the other hand, the pair of front and rear gusset plates 2, 2 ', 3, 3' are formed of a steel plate, and fitted to one side of the gusset plate with the notch 6 formed on the side of the truss material 1, 1 '. The matching mounting projection 7 is formed so as to protrude in the same body.
Then, the mounting projections 7 formed continuously on the pair of front and rear gusset plates 2, 2 ', 3, 3' are fitted into the cutouts 6 of the compression-side truss member 1 and the tension-side truss member 1 ', and the joint is formed. By welding, the two are firmly integrated. That is, the gusset plates 2, 2 ', 3, 3' side mounting projections 7 are fitted and welded to the notches 6 formed in the peripheral wall of the truss material as described above, so that the welding area of both members is large. In addition, welding can be performed by joining the surfaces, and the surface of the round steel pipe and the surface of the mounting projection can be continuously provided flush. In addition, fatigue resistance can be taken into consideration by processing the tip of the mounting projection 7 into an R surface and also performing R processing on the shape of the notch 6 on the truss material side.
[0013]
The gusset plates 2, 2 ′, 3, 3 ′ are provided with a large number of through holes 8 for inserting high-strength bolts 5 in a lattice pattern. A perforated steel plate dowel (abbreviation: PBL dowel) 9 is integrally formed.
[0014]
An attachment plate 4 that frictionally joins a pair of front and rear gusset plates 2 and 2 ′ of the compression side truss member 1 and a pair of front and rear gusset plates 3 and 3 ′ of the tension side truss member 1 ′ with a high-strength bolt 5 is a compression side truss. The gusset plates 2 and 2 ′ of the material 1 and the gusset plates 3 and 3 ′ of the tension side truss material 1 ′ are formed so as to extend over the gusset plates. Like the hole 8, it is opened in a lattice shape. In addition, the angle of the truss material at the time of erection can be adjusted by manufacturing the installation position of the mounting hole 11 while reflecting the measured value.
[0015]
Also, the peripheral wall of the truss material (round steel pipe) sandwiched between the mounting projections 7 of the pair of front and rear gusset plates 2, 2 ', 3, 3' in the compression side truss member 1 and the tension side truss member 1 '. Is provided with a through hole 12. The through-hole 12 is used to insert a reinforcing bar 13 and a PC cable (not shown) arranged along the bridge axis direction into the upper and lower floor slabs A and A 'made of concrete, and to fill the truss material with concrete. Can be increased.
[0016]
Due to the above-mentioned point structure, the pair of front and rear gusset plates 2, 2 ', 3, 3' fixed to the compression side truss member 1 and the tension side truss member 1 'are clamped by the attachment plates 4, respectively, to provide high strength. Since the bolts are tightened with bolts, two-sided frictional joining is achieved, and the point portion can be made compact. Thereby, the point portion can be embedded in the concrete 14.
In addition, as described above, since the entire graded portion can be embedded in concrete, the painted area of the truss material (painted area of the exposed portion) is smaller than that of the conventional configuration in which the joint between the gusset plate and the truss material is exposed. And economic benefits can be expected.
[0017]
FIG. 6 is a diagram showing a modified application of the point structure of the present invention. In the above-described embodiment, the web of the steel truss connects the upper and lower slabs made of concrete, but the web of the steel truss may be connected and fixed to the upper and lower chord members made of steel.
As shown in the drawing, the attachment plates 21 and 21 'are integrally formed on the front and rear sides of the lower surface of the upper chord material C made of steel, and the front and rear attachment plates 21 and 21' are provided between the attachment plates 21 and 21 '. Each gusset of a truss member having the same configuration as that shown in the example, that is, a compression-side truss member (round steel tube) 23 to which a gusset plate 22 is welded and a tension-side truss member (round steel tube) 25 to which a gusset plate 24 is welded The plate is inserted, the attachment plate 26 is joined to the inside of the gusset plates 22 and 24, and frictionally joined with high-strength bolts 27. As a result, the gusset plate 22 of the compression-side truss member 23 and the gusset plate 24 of the tension-side truss member 25 are sandwiched by the attachment plates.
According to the above configuration, it is possible to use a round steel pipe for the truss member connected to the upper and lower chord members. The upper and lower chords may be arbitrarily buried in a concrete slab or partially buried.
[0018]
Note that the present invention is not limited to the above-described embodiment, and can be changed without departing from the gist of the invention.
(1) The welding of the gusset plate to the truss material of the round steel pipe may be performed by attaching a receiving seat to the back surface of the gusset plate without applying the truss material to the truss material.
(2) The truss material may be a square steel pipe.
[0019]
【The invention's effect】
The point structure of the steel truss web PC bridge of the present invention can be a two-face friction high-strength bolted joint according to the configuration of claim 1, whereby the point portion can be made more compact than the conventional structure. . Therefore, it is possible to embed the point portion in the concrete, and to integrate the concrete member and the steel member firmly.
Further, according to the configuration of the second aspect, the gusset plate can be firmly fixed even if the truss material is a round steel pipe. Therefore, as compared with the conventional gusset point structure using a square steel pipe, a general round steel pipe can be used, which is economically advantageous.
Furthermore, according to the configuration of claim 3, in addition to the arrangement of the reinforcing steel bar in the bridge axis direction, the filling property of the concrete into the truss material (steel pipe) can be improved, and the integration of the concrete member and the steel member can be further strengthened. Can be.
[Brief description of the drawings]
FIG. 1 is a perspective view showing the appearance of a steel truss web PC bridge according to the present invention.
FIG. 2 is an enlarged perspective view showing a point structure portion.
FIG. 3 is an enlarged plan view of a point portion.
FIG. 4 is an enlarged sectional view taken along line (4)-(4) in FIG.
FIG. 5 is an exploded perspective view of members forming a point portion.
FIG. 6 is a perspective view showing a modified application of the point structure of the present invention.
FIG. 7 is a front view showing a conventional gusset point structure.
[Explanation of symbols]
A, A ': Upper and lower decks B: Web (steel truss)
DESCRIPTION OF SYMBOLS 1 ... Compression side truss material 1 '... Tension side truss material 2, 2' ... Gusset plate 3, 3 '... Gusset plate 4 ... Attachment plate 5 ... High-strength bolt 6 ... Notch part 7 ... Mounting protrusion 12 ... Penetration Hole

Claims (3)

コンクリート製の上・下床版を、鋼トラスのウエブで連結した鋼トラスウエブＰＣ橋における格点構造であって、
鋼管で構成した圧縮側トラス材及び引張側トラス材のそれぞれ端部に、前後一対のガセットプレートを該鋼管の周囲に相対峙して固着し、その圧縮側トラス材の前後一対のガセットプレートと引張側トラス材の前後一対のガセットプレートを、それぞれ添接板を介し高力ボルトで接合一体化したことを特徴とする鋼トラスウエブＰＣ橋の格点構造。A point structure in a steel truss web PC bridge in which concrete upper and lower slabs are connected by steel truss webs,
A pair of front and rear gusset plates are fixed to the ends of the compression-side truss member and the tension-side truss member, each of which is opposed to the periphery of the steel tube, and the front and rear gusset plates of the compression-side truss member are tensioned. A pointed structure of a steel truss web PC bridge, wherein a pair of gusset plates in front and behind of a side truss member are joined and integrated with high-strength bolts via respective attachment plates. 上記圧縮側トラス材及び引張側トラス材を構成する鋼管が丸型鋼管で、その丸型鋼管に対する前後一対のガセットプレートの固着は、該鋼管の周壁を側端部から軸心に沿って所定長さ切欠き、その切欠き部に、ガセットプレートに一体に形成した取付突片を接合溶接したことを特徴とする請求項１記載の鋼トラスウエブＰＣ橋の格点構造。The steel pipe constituting the compression-side truss material and the tension-side truss material is a round steel pipe, and a pair of front and rear gusset plates are fixed to the round steel pipe by a predetermined length from the side end along the axis from the side end. 2. The point structure of a steel truss web PC bridge according to claim 1, wherein the notch and a mounting projection piece formed integrally with the gusset plate are joined and welded to the notch. 上記前後一対のガセットプレートの取付突片間に挟まれた丸型鋼管の周壁に、橋軸方向に配置する鉄筋を貫通配置する貫通孔が開設されていることを特徴とする請求項１又は２記載の鋼トラスウエブＰＣ橋の格点構造。The through-hole which penetrates and arrange | positions the rebar arrange | positioned in the bridge axis direction is formed in the peripheral wall of the round steel pipe pinched | interposed between the attachment protrusions of the said pair of front and rear gusset plates. The point structure of the described steel truss web PC bridge.
JP2002370027A 2002-12-20 2002-12-20 Grade structure of steel truss web PC bridge Expired - Fee Related JP3866194B2 (en)

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JP2008156967A (en) * 2006-12-26 2008-07-10 Fuji Ps Corp Composite truss girder structure
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