JPH11303022A - Bridge composite floor slab - Google Patents
Bridge composite floor slabInfo
- Publication number
- JPH11303022A JPH11303022A JP11067298A JP11067298A JPH11303022A JP H11303022 A JPH11303022 A JP H11303022A JP 11067298 A JP11067298 A JP 11067298A JP 11067298 A JP11067298 A JP 11067298A JP H11303022 A JPH11303022 A JP H11303022A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- truss
- floor slab
- concrete
- reinforcements
- 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
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、橋梁上部工に用
いられる鋼コンクリート合成床版の構造に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel-concrete composite slab used for a bridge superstructure.
【０００２】[0002]
【従来の技術】橋梁に用いられる鉄筋コンクリート床版
は、道路橋示方書・同解説II鋼橋編に規定されており、
相対する２辺で単純支持された等方性無限単純版と仮定
して断面力が算出され、主鉄筋方向および配力筋方向に
ついての鉄筋配置が決定される。その際、床版のせん断
力に対する照査を行わなくてもよいことも規定されてい
る。2. Description of the Related Art Reinforced concrete slabs used for bridges are stipulated in the specification for road bridges and the explanations for steel bridges II.
The section force is calculated assuming an isotropic infinite simple version simply supported on two opposing sides, and the rebar arrangement in the main rebar direction and the distribution bar direction is determined. At that time, it is also specified that the checking for the shear force of the floor slab need not be performed.
【０００３】一方、実開昭５６−１５７２１９号公報に
は、建物の床版として用いられる鉄筋コンクリート床版
の大支間化に伴う剛性確保や型枠、鉄筋工事の施工性の
向上を目的として、金網からなるせき板上に鉄筋からな
るトラス梁を複数列配置し、トラス梁と金網間に高剛性
の格子ラスを配置し、コンクリートを打設した鉄筋コン
クリート床版が記載されている。On the other hand, Japanese Utility Model Application Laid-Open No. 56-157219 discloses a wire mesh for the purpose of securing rigidity and improving the workability of a formwork and a reinforcing steel work accompanying a large span of a reinforced concrete slab used as a floor slab of a building. There is described a reinforced concrete floor slab in which a plurality of rows of truss beams made of reinforcing steel are arranged on a weir board made of steel, a highly rigid lattice lath is arranged between the truss beams and a wire mesh, and concrete is cast.
【０００４】また、実開平３−８４３２７号公報には、
建物の床版下部に用いられるプレキャストコンクリート
版に関し、１本の上弦材と１本の下弦材をラチス材で連
結した２組の平面トラス筋を、上弦材側を接近させ、下
弦材間に距離をおいて配置した構造のトラス鉄筋を用
い、下弦材側をプレキャストコンクリート版のコンクリ
ート中に埋設し、上弦材側を突出させ、現場打ちコンク
リートと一体化できるようにしたものが記載されてい
る。In Japanese Utility Model Laid-Open Publication No. 3-84327,
With regard to the precast concrete slab used for the lower part of the floor slab of the building, two pairs of plane truss bars in which one upper chord material and one lower chord material are connected by a lattice material are brought closer to the upper chord material side, and the distance between the lower chord materials is changed. It describes that the lower chord side is buried in the concrete of the precast concrete slab and the upper chord side is protruded so that it can be integrated with the cast-in-place concrete by using a truss reinforcing bar having a structure arranged in advance.
【０００５】[0005]
【発明が解決しようとする課題】橋梁に用いられる鉄筋
コンクリート床版においては、大型トラック等による輪
荷重により交通量の多い所では完成供用後約１０年くら
いで破壊が生じてきている。このため、道路橋示方書の
改定等により床版厚の増厚、床版支間長の短支間化等規
定が変更されてきている。In a reinforced concrete floor slab used for a bridge, a wheel load caused by a large truck or the like causes a destruction to occur in a place with a large traffic volume about 10 years after completion of operation. For this reason, regulations such as increasing the thickness of the floor slab and shortening the length of the floor slab span have been changed due to the revision of the specification for road bridges.
【０００６】しかしながら、その破壊性状が最終的には
せん断破壊を呈することから、せん断補強筋を有してい
ない現行の床版では完全に破壊が防止できるとは言い切
れない。[0006] However, since the fracture properties eventually show shear failure, it cannot be said that current floor slabs without shear reinforcement can completely prevent the failure.
【０００７】また、コンクリートそのものの打設につい
ては現場打ちが一般的に行われているため、主に木材を
用いた型枠が使用されており、全面足場工が必要となる
ことから安全性とコスト面、工期面からの改善が望まれ
ている。[0007] In addition, since the casting of concrete itself is generally performed in-situ, a formwork mainly using wood is used. Improvements in cost and construction period are desired.
【０００８】本願発明は、このような橋梁用床版におけ
る課題の解決を図ったものであり、重交通下の床版の破
損を防止することができ、施工における型枠材の省力
化、工期短縮、安全性、経済性の向上が可能な橋梁用合
成床版を提供することを目的としている。The present invention has been made to solve the problem in such a bridge slab, can prevent the slab from being damaged under heavy traffic, can save the formwork material during construction, and can shorten the construction period. The purpose is to provide a composite floor slab for bridges that can be shortened, improved in safety and improved in economic efficiency.
【０００９】[0009]
【課題を解決するための手段】本願の請求項１に係る橋
梁用合成床版は、型枠鋼板上に、１本の上弦材と２本の
下弦材間をラチス材で連結してなるせん断補強用のトラ
ス鉄筋を、床版コンクリート中に配筋される上側主鉄筋
と平行に複数並列配置し、前記トラス鉄筋と型枠鋼板を
接合して一体化し、前記トラス鉄筋上に上側配力筋を直
交するように配置し、さらに前記上側配力筋上に前記上
側主鉄筋を直交するように配置し、前記型枠鋼板上にコ
ンクリートを打設することで、前記型枠鋼板を下側補強
鋼材とする鋼コンクリート合成構造の床版を構成したこ
とを特徴とするものである。According to a first aspect of the present invention, there is provided a composite floor slab for a bridge, comprising a form steel plate and a shear member formed by connecting one upper chord material and two lower chord materials with a lattice material. A plurality of reinforcing truss reinforcing bars are arranged in parallel with the upper main reinforcing bar arranged in the floor slab concrete, and the truss reinforcing bar and the form steel plate are joined and integrated, and the upper reinforcing bar is provided on the truss reinforcing bar. Are arranged so as to be orthogonal, and further, the upper main reinforcing steel is arranged so as to be orthogonal to the upper force bar, and concrete is cast on the form steel sheet, thereby reinforcing the form steel sheet to a lower side. The steel slab is composed of a steel-concrete composite structure made of steel.
【００１０】トラス鉄筋と型枠鋼板の接合は、通常、溶
接によって行われるが、特に限定されない。[0010] The joining of the truss reinforcing bar and the form steel plate is usually performed by welding, but is not particularly limited.
【００１１】本願発明では、橋梁上部工に用いられる従
来の鉄筋コンクリート製の床版における上側主鉄筋およ
び上側配力筋の配置は、基本的に現行のままとし、トラ
ス鉄筋を上側主鉄筋と平行に所定の間隔で配置し、これ
を型枠鋼板上に載せて一体化する。In the present invention, the arrangement of the upper main reinforcing bar and the upper force bar in the conventional reinforced concrete floor slab used for the bridge superstructure is basically the same as the existing one, and the truss reinforcing bar is arranged in parallel with the upper main reinforcing bar. They are arranged at predetermined intervals, and are placed on a form steel plate to be integrated.
【００１２】床版コンクリートの打設、硬化後、型枠鋼
板はコンクリートと一体化して鋼コンクリート合成床版
としての主部材の機能を有するため、下側主鉄筋および
下側配力筋が省略でき、製作の省力化につながる。After placing and hardening the slab concrete, the form steel plate is integrated with the concrete and has the function of a main member as a steel-concrete composite slab, so that the lower main reinforcing bar and the lower force bar can be omitted. , Leading to labor savings in production.
【００１３】また、トラス鉄筋を採用したことにより、
床版主鉄筋方向にせん断力をスムーズに伝達させること
ができ、床版の破損を防止する。さらに、このトラス鉄
筋はコンクリート打設時においては、型枠鋼板を補剛し
て鋼製型枠の主部材の機能を併せ持つので、型枠部材の
大幅な省力化につながり、全面足場工の省略が可能であ
るとともに安全性、経済性が大幅に改善される。[0013] Also, by adopting the truss rebar,
The shear force can be smoothly transmitted in the direction of the main reinforcing bar of the slab, and the slab is prevented from being damaged. Furthermore, this truss reinforcing bar stiffens the form steel plate when casting concrete, and also has the function of the main member of the steel formwork, leading to significant labor savings of the formwork member and elimination of the entire scaffolding work. And safety and economy are greatly improved.
【００１４】[0014]
【発明の実施の形態】図１および図２は、本願発明に係
る橋梁用合成床版の一実施形態について、コンクリート
打設前の状態を示したものである。1 and 2 show a composite floor slab for a bridge according to an embodiment of the present invention before concrete is cast.
【００１５】図に示すように、上側主鉄筋４と平行に
（すなわち橋軸直角方向に）延びるトラス鉄筋２が、型
枠鋼板１上に所定間隔をおいて複数並列に配置され、こ
のトラス鉄筋２上にトラス鉄筋２と直交するように上側
配力筋３を配置し、さらにその上に、上側配力筋３と直
交するように上側主鉄筋４を配置し、これらを結束線等
により結束する。As shown in the figure, a plurality of truss reinforcing bars 2 extending in parallel with the upper main reinforcing bar 4 (that is, in the direction perpendicular to the bridge axis) are arranged in parallel on the form steel plate 1 at predetermined intervals. An upper force bar 3 is arranged on the truss reinforcing bar 2 so as to be orthogonal to the truss reinforcing bar 2, and an upper main reinforcing bar 4 is further arranged thereon so as to be orthogonal to the upper truss reinforcing bar 3. I do.
【００１６】図３は、本願発明で使用するトラス鉄筋２
の一例を示したもので、１本の上弦材５と２本の下弦材
６を有し、上弦材５と下弦材６間を２組の波状に折り曲
げたラチス材７で連結して立体トラス状に組み立てたも
のである。FIG. 3 shows a truss reinforcing bar 2 used in the present invention.
A three-dimensional truss having one upper chord member 5 and two lower chord members 6 and connected between the upper chord member 5 and the lower chord member 6 by two sets of lattice members 7 bent in a wave shape. It is assembled in a shape.
【００１７】このように形成されたトラス鉄筋２を、上
述のように型枠鋼板１の上面に溶接等により取り付ける
ことで、図４に示すようなトラス鉄筋２と型枠鋼板１が
一体化されたパネル状の部材が形成される。The truss reinforcing bar 2 thus formed is attached to the upper surface of the form steel plate 1 by welding or the like as described above, whereby the truss reinforcing bar 2 and the form steel plate 1 as shown in FIG. A panel-shaped member is formed.
【００１８】このようなパネル状の部材を工場または現
場で組み立て、橋梁主桁上に架設し、上側配力筋３およ
び上側主鉄筋４を配筋した後、型枠鋼板１上にコンクリ
ートを打設することで、本願発明の橋梁用合成床版が形
成される。その際の荷重は一体化された型枠鋼板１とト
ラス鉄筋２が負担する。[0018] Such a panel-shaped member is assembled at a factory or a site, erected on a bridge main girder, and the upper reinforcing bars 3 and the upper main reinforcing bars 4 are arranged. With this arrangement, the bridge composite floor slab of the present invention is formed. The load at that time is borne by the integrated formwork steel plate 1 and the truss reinforcing bar 2.
【００１９】なお、上側配力筋３および上側主鉄筋４も
含めて、工場製作とすることも可能であり、その場合、
現場作業がさらに簡略化される。It is to be noted that it is also possible to manufacture the plant including the upper force bars 3 and the upper main reinforcing bars 4 in such a case.
Field work is further simplified.
【００２０】コンクリートが硬化した後は、合成床版と
して輪荷重による曲げモーメントについては、上側主鉄
筋４、上側配力筋３、型枠鋼板１およびコンクリートの
合成断面で抵抗し、せん断力の伝達については、せん断
補強筋として機能するトラス鉄筋２およびコンクリート
で抵抗させるものである。このような構成により、床版
の疲労によるせん断破壊を防止することができる。After the concrete hardens, the composite floor slab resists the bending moment due to the wheel load in the composite section of the upper main reinforcing bar 4, the upper reinforcing bar 3, the formwork steel plate 1 and the concrete, and the shear force is transmitted. Is to resist with the truss reinforcing bar 2 functioning as a shear reinforcing bar and concrete. With such a configuration, shear fracture due to fatigue of the floor slab can be prevented.
【００２１】[0021]
【発明の効果】型枠鋼板が床版コンクリートと一体化
して鋼コンクリート合成床版としての主部材、すなわち
下側補強鋼材として機能するため、下側主鉄筋および下
側配力筋が省略でき、製作の省力化につながる。 トラス鉄筋により、床版主鉄筋方向にせん断力をスム
ーズに伝達させることができ、床版の破損を防止する。 型枠鋼板および型枠の主部材としても機能するトラス
鉄筋の一体化により、鋼製型枠パネル工法が実施でき、
工期短縮となる。また、全面足場の省略が可能となり、
安全性が向上する。 以上により、軽量で加工工数が少なく、現地作業の安
全性を確保できる構造が経済的に実現できる。 さらに、せん断補強筋としてのトラス鉄筋の機能によ
り、将来の床版の破損補修に伴うメンテナンスおよび多
大の補修費用の発生を防止することができる。According to the present invention, the form steel sheet is integrated with the slab concrete to function as a main member as a steel-concrete composite slab, that is, as a lower reinforcing steel material, so that a lower main reinforcing bar and a lower force bar can be omitted. This leads to labor saving in production. The truss reinforcing bar can smoothly transmit the shear force in the direction of the main reinforcing bar of the slab, thereby preventing the slab from being damaged. With the integration of the formwork steel plate and the truss rebar that also functions as the main member of the formwork, the steel formwork panel method can be implemented,
The construction period is shortened. Also, the entire scaffold can be omitted,
Safety is improved. As described above, a structure that is lightweight, requires few processing steps, and can ensure the safety of on-site work can be economically realized. Further, the function of the truss reinforcing bar as a shear reinforcing bar can prevent a maintenance and a large repair cost associated with a repair of a damaged floor slab in the future.
【図１】本願発明の一実施形態における型枠鋼板および
配筋を示す斜視図である。FIG. 1 is a perspective view showing a form steel plate and reinforcing bars according to an embodiment of the present invention.
【図２】図１に対応する橋軸直角方向の断面図である。FIG. 2 is a cross-sectional view in a direction perpendicular to the bridge axis corresponding to FIG.
【図３】本願発明で使用するトラス鉄筋の一例を示す斜
視図である。FIG. 3 is a perspective view showing an example of a truss reinforcing bar used in the present invention.
【図４】トラス鉄筋と型枠鋼板が一体化された状態を示
す斜視図である。FIG. 4 is a perspective view showing a state where a truss reinforcing bar and a form steel plate are integrated.
１…型枠鋼板、２…トラス鉄筋、３…上側配力筋、４…
上側主鉄筋、５…上弦材、６…下弦材、７…ラチス材1 ... form steel plate, 2 ... truss reinforcing bar, 3 ... upper force bar, 4 ...
Upper main rebar, 5 ... upper chord, 6 ... lower chord, 7 ... lattice
Claims (1)
弦材間をラチス材で連結してなるせん断補強用のトラス
鉄筋を、床版コンクリート中に配筋される上側主鉄筋と
平行に複数並列配置し、前記トラス鉄筋と型枠鋼板を接
合して一体化し、前記トラス鉄筋上に上側配力筋を直交
するように配置し、さらに前記上側配力筋上に前記上側
主鉄筋を直交するように配置し、前記型枠鋼板上にコン
クリートを打設することで、前記型枠鋼板を下側補強鋼
材とする鋼コンクリート合成構造の床版を構成したこと
を特徴とする橋梁用合成床版。1. A truss reinforcing steel reinforced by connecting one upper chord material and two lower chord materials with a lattice material on a form steel plate, and an upper main stiffener arranged in the floor slab concrete. Plural parallel arrangements are made in parallel with the rebar, the truss rebar and the form steel plate are joined and integrated, an upper force-reinforcing bar is arranged on the truss rebar so as to be orthogonal, and further, the upper By arranging the main reinforcing bars so as to be orthogonal to each other and casting concrete on the form steel plate, a floor slab of a steel-concrete composite structure using the form steel plate as a lower reinforcing steel material was configured. Composite floor slab for bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11067298A JPH11303022A (en) | 1998-04-21 | 1998-04-21 | Bridge composite floor slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11067298A JPH11303022A (en) | 1998-04-21 | 1998-04-21 | Bridge composite floor slab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11303022A true JPH11303022A (en) | 1999-11-02 |
Family
ID=14541543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11067298A Pending JPH11303022A (en) | 1998-04-21 | 1998-04-21 | Bridge composite floor slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11303022A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003097805A (en) * | 2001-09-25 | 2003-04-03 | Nippon Steel Corp | Incinerated substance dumping floor part structure in refuse incinerator or melting furnace, and its manufacturing method |
| JP5866038B1 (en) * | 2015-01-22 | 2016-02-17 | 株式会社富士昭技研 | Deck plate, floor slab, deck plate manufacturing method, and floor slab construction method |
| CN105780649A (en) * | 2016-05-10 | 2016-07-20 | 四川省交通运输厅公路规划勘察设计研究院 | Concave rib weathering resistant steel-concrete combination bridge deck |
| CN109898401A (en) * | 2019-03-07 | 2019-06-18 | 中铁大桥勘测设计院集团有限公司 | Stretched wire type gets higher steel truss girder and its construction method |
| CN112982162A (en) * | 2021-03-17 | 2021-06-18 | 河南新昱鑫桥梁钢构有限责任公司 | Steel bar truss type steel-concrete combined bridge deck and construction method |
-
1998
- 1998-04-21 JP JP11067298A patent/JPH11303022A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003097805A (en) * | 2001-09-25 | 2003-04-03 | Nippon Steel Corp | Incinerated substance dumping floor part structure in refuse incinerator or melting furnace, and its manufacturing method |
| JP4691861B2 (en) * | 2001-09-25 | 2011-06-01 | 新日鉄エンジニアリング株式会社 | Waste incinerator or melting furnace incinerator input floor structure and method for manufacturing the same |
| JP5866038B1 (en) * | 2015-01-22 | 2016-02-17 | 株式会社富士昭技研 | Deck plate, floor slab, deck plate manufacturing method, and floor slab construction method |
| CN105780649A (en) * | 2016-05-10 | 2016-07-20 | 四川省交通运输厅公路规划勘察设计研究院 | Concave rib weathering resistant steel-concrete combination bridge deck |
| CN105780649B (en) * | 2016-05-10 | 2018-01-23 | 四川省交通运输厅公路规划勘察设计研究院 | Recessed rib weathering steel concrete combined bridge deck |
| CN109898401A (en) * | 2019-03-07 | 2019-06-18 | 中铁大桥勘测设计院集团有限公司 | Stretched wire type gets higher steel truss girder and its construction method |
| CN109898401B (en) * | 2019-03-07 | 2021-06-15 | 中铁大桥勘测设计院集团有限公司 | Suspension chain type variable height steel truss girder and construction method thereof |
| CN112982162A (en) * | 2021-03-17 | 2021-06-18 | 河南新昱鑫桥梁钢构有限责任公司 | Steel bar truss type steel-concrete combined bridge deck and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100609304B1 (en) | Precast Composition I-Beam with Concrete Panel and Corrugated Steel Web Girder | |
| KR100447013B1 (en) | Beam system composed of asymmetric steel section with web hole and concrete | |
| JPH09221717A (en) | Steel-concrete composite floor-slab bridge and construction method thereof | |
| CN111424546A (en) | Inverted T-shaped steel beam-concrete combined beam structure of small and medium-span bridge and construction method | |
| JP2007077658A (en) | Construction method for bridge girder | |
| KR20120093613A (en) | Prestressed concrete box girder integrated with steel deck and constructing method of bridge using such girder | |
| CN211522899U (en) | Long-span steel-concrete composite beam convenient to erect by bridge girder erection machine | |
| JP3880288B2 (en) | Precast segment and bridge girder forming method using the same | |
| JP2006009449A (en) | Truss panel girder and precast truss panel | |
| CN110392758B (en) | Inverted T-shaped section mixed prestressed concrete beam and panel construction method using same | |
| KR20080093261A (en) | Composite bridge construction method | |
| KR100565384B1 (en) | Structure of continuous PSC beam with connection member and steel cross beam and bridge construction method using the same | |
| KR100634344B1 (en) | Composite slab and the joint structure | |
| JP2008088634A (en) | Composite steel-concrete floor slab | |
| JPH11303022A (en) | Bridge composite floor slab | |
| JP3579167B2 (en) | Deck for road surface and its laying method | |
| KR100623996B1 (en) | Bridge construction method using truss-web girder with reinforced support | |
| KR200420261Y1 (en) | Truss-web girder with reinforced support | |
| JPH08253909A (en) | Ferroconcrete floor slab for bridge and form therefor | |
| KR20080004752U (en) | Composite bridge | |
| CN111411722A (en) | Prefabricated superimposed beam slab suitable for assembly system | |
| CN218881308U (en) | Self-bearing prestressed net rib plate | |
| JP2010281040A (en) | Steel concrete composite floor slab, panel for constructing the steel concrete composite floor slab, and construction method for steel concrete composite floor slab | |
| CN220099642U (en) | Perforated steel grid-high-strength concrete cast-in-situ combined bridge deck | |
| JP2002173911A (en) | Re-covering execution method for steel floorslab and concrete floorslab |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20040316 |