JPH05311794A - Construction of composite floor slab and deck plate therefor - Google Patents
Construction of composite floor slab and deck plate thereforInfo
- Publication number
- JPH05311794A JPH05311794A JP14489192A JP14489192A JPH05311794A JP H05311794 A JPH05311794 A JP H05311794A JP 14489192 A JP14489192 A JP 14489192A JP 14489192 A JP14489192 A JP 14489192A JP H05311794 A JPH05311794 A JP H05311794A
- Authority
- JP
- Japan
- Prior art keywords
- deck plate
- synthetic
- floorboard
- concrete
- synthetic floorboard
- 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
Landscapes
- Panels For Use In Building Construction (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は，コンクリート打設時
には梁間に渡したデッキプレートが型枠として機能し，
コンクリート硬化後はデッキプレートがコンクリートと
一体となって作用荷重を負担する構造を持つ合成床板を
構築する合成床板施工方法，および，この合成床板に使
用する合成床板用デッキプレートに関する。[Industrial application] The present invention, when placing concrete, the deck plate passed between the beams functions as a formwork,
The present invention relates to a synthetic floorboard construction method for constructing a synthetic floorboard having a structure in which a deck plate is integrated with concrete after hardening of concrete so as to bear an action load, and a deck plate for a synthetic floorboard used for the synthetic floorboard.
【０００２】[0002]
【従来の技術】合成床板は，コンクリート打設時には梁
間に渡したデッキプレートが型枠として機能し，コンク
リート硬化後はデッキプレートがコンクリートと一体と
なって作用荷重を負担する構造の床板であり，デッキプ
レートが作用荷重を負担することでコンクリート厚を薄
くできるという利点を有するので，近年広く採用されて
いる。2. Description of the Related Art A synthetic floorboard is a floorboard having a structure in which a deck plate passed between beams functions as a formwork during concrete pouring, and after hardening of the concrete, the deck plate is integrated with the concrete to bear the working load. The deck plate has been widely adopted in recent years because it has the advantage that the concrete thickness can be reduced by bearing the acting load.
【０００３】この合成床板は，一定の条件を具備すれば
耐火被覆を施工しなくても耐火構造と認められる（無被
覆耐火構造）ので，施工性に優れているが，従来の無被
覆２時間耐火指定の合成床板は，火災時耐力の面から，
２スパン以上に渡って小梁等で支持する連続支持方式
（連続梁型の支持方式）が条件であり，１スパンの単純
支持方式（両端支持梁型の支持方式）は合成床板として
の耐力不足のため実現されていなかった。また，従来の
合成床板の１スパンの長さは，同じく耐力の面から２．
０ｍ〜３．５ｍ程度であり，例えば４ｍ以上のスパン等
のロングスパンは実用化されていなかった。なお，連続
支持方式は，中間支点における負曲げモーメント（梁を
上に凸に曲げようとする向きの曲げモーメント）の効果
により単純支持方式より耐力の点で有利である（すなわ
ち同じ荷重に対してたわみが少ない）。This synthetic floorboard is excellent in workability because it can be recognized as a fireproof structure without applying a fireproof coating if certain conditions are satisfied (uncoated fireproof structure). The fireproof synthetic floorboard is
The condition is a continuous support method (continuous beam type support method) in which a beam or the like is supported over two spans or more, and the simple support method of 1 span (both ends support beam type support method) is insufficient in yield strength as a composite floor board. Was not realized because. Also, the length of one span of the conventional synthetic floorboard is 2.
It is about 0 m to 3.5 m, and long spans such as spans of 4 m or more have not been put to practical use. The continuous support method is more advantageous than the simple support method in terms of yield strength due to the effect of the negative bending moment at the intermediate fulcrum (bending moment in the direction to bend the beam upwardly) (that is, for the same load). Little deflection).
【０００４】従来の無被覆２時間耐火構造の合成床板を
図５，図６に示す。この合成床板に使用している合成床
板用デッキプレート１の断面形状は，図５に示すよう
に，ほぼ台形状の山部Ａとほぼ逆台形状の谷部Ｂとが斜
辺部分を共有して交互に形成されるように水平な頂面部
２と傾斜ウエブ３と水平な底面部４とが連続し，左右両
端の底面部４の端縁部に，隣接するものどうしが互いに
係合する形状の係合部５，６を備え，前記傾斜ウエブ３
に折曲段部７を持ち，底面部４に鍵溝状凸部８を持つ断
面形状である。そして，合成床板施工の際は，この合成
床板用デッキプレート１を，図６に示すように２スパン
以上に渡ってＨ型鋼の梁１１上に載置し，溶接金網１２
を配置して，コンクリート１３を打設する。FIGS. 5 and 6 show a conventional synthetic floorboard having an uncoated two-hour fireproof structure. As shown in FIG. 5, the cross-sectional shape of the synthetic floorboard deck plate 1 used in this synthetic floorboard is such that a substantially trapezoidal peak portion A and a substantially inverted trapezoidal valley portion B share a hypotenuse portion. The horizontal top surface portion 2, the inclined web 3 and the horizontal bottom surface portion 4 are continuously formed so as to be alternately formed, and the adjacent edge portions of the bottom surface portions 4 at the left and right ends are formed so that adjacent ones engage with each other. The inclined web 3 is provided with engaging portions 5 and 6.
It has a bent step portion 7 and a bottom surface portion 4 having a key groove-shaped convex portion 8. When constructing the synthetic floorboard, the deck plate 1 for the synthetic floorboard is placed on the H-shaped steel beam 11 over two spans as shown in FIG.
Is placed and concrete 13 is placed.
【０００５】ところで，合成床板用デッキプレートにお
いて，コンクリート打設時にデッキプレートの長さ方向
端部からのコンクリート漏れを防ぐために，図７に示す
ように，デッキプレート１の長手方向の両端部を山部の
頂面部２が谷部の底面部４側にくるように押し潰してほ
ぼ平坦な鉄骨梁載置部１５を形成したデッキプレート
（これをエンクロ（エンドクローズド）デッキプレート
と称する）が使用されている。また，主として建物の階
高を節減するために，図８に示すように，デッキプレー
ト１の両端部を谷部の底面部４が山部の頂面部２側にく
るように逆に押し潰してほぼ平坦な鉄骨梁載置部１６を
形成すること（この構造を逆エンクロと称する）も行わ
れている。この逆エンクロ構造は，傾斜面部分１８によ
ってデッキプレート１とコンクリート１３との間の長さ
方向のずれを拘束するので，合成床板としての耐力向上
に有効であることが知られている。すなわち，図９
（イ）に示すように，逆エンクロ加工を施していない合
成床板では，荷重によりたわみが生じた時，デッキプレ
ート１とコンクリート１３との間に長手方向のずれδが
生じることになり，コンクリートにひび割れが生じ，合
成効果が損なわれる。しかし，図９（ロ）のように両端
部を逆エンクロ構造とした場合，デッキプレート１とコ
ンクリート１３との長さ方向のずれは両端の逆エンクロ
構造による傾斜面部分１８で拘束され，合成効果が確保
できる。しかし，従来の無被覆２時間耐火構造の合成床
板は，２スパン以上の連続支持であり，中間支点が存在
することから両端部の逆エンクロ構造は採用していな
い。By the way, in order to prevent concrete from leaking from the end of the deck plate in the longitudinal direction at the time of placing concrete in the deck plate for the composite floor board, as shown in FIG. A deck plate (which is referred to as an "enclosed deck plate") in which a substantially flat steel beam mounting portion 15 is formed by crushing so that the top surface portion 2 of the portion comes to the bottom surface portion 4 side of the valley portion is used. ing. Further, in order to mainly save the floor height of the building, as shown in FIG. 8, both end portions of the deck plate 1 are crushed in reverse so that the bottom surface portion 4 of the valley portion comes to the top surface portion 2 side of the mountain portion. It is also performed to form a substantially flat steel beam mounting portion 16 (this structure is referred to as reverse enclosure). It is known that this reverse enclosure structure is effective in improving the proof strength as a composite floor board because it restrains the displacement in the length direction between the deck plate 1 and the concrete 13 by the inclined surface portion 18. That is, FIG.
As shown in (a), in a synthetic floorboard that is not subjected to reverse encropping, when a deflection is generated by a load, a longitudinal shift δ occurs between the deck plate 1 and the concrete 13, and the concrete Cracks occur and the synthetic effect is impaired. However, in the case where both ends have the reverse enclosure structure as shown in FIG. 9B, the displacement in the length direction between the deck plate 1 and the concrete 13 is restrained by the inclined surface portions 18 due to the reverse enclosure structure at both ends, and the combined effect is obtained. Can be secured. However, the conventional uncoated 2-hour fireproof composite floorboard has a continuous span of 2 spans or more, and since it has an intermediate fulcrum, it does not use the reverse enclosure structure at both ends.
【０００６】なお，図７，図８において，符号１７は合
成床板と梁１１とを結合させて合成梁の効果を確保する
ために梁１１の上面に垂直に溶接固定した頭付きスタッ
ドであり，この頭付きスタッド１７の全体をコンクリー
トに埋め込んで，合成床板と梁１１との結合を確保す
る。In FIGS. 7 and 8, reference numeral 17 is a headed stud vertically welded and fixed to the upper surface of the beam 11 in order to secure the effect of the composite beam by connecting the composite floor board and the beam 11. The entire headed stud 17 is embedded in concrete to secure the connection between the composite floorboard and the beam 11.
【０００７】[0007]
【発明が解決しようとする課題】合成床板の施工性を考
慮した場合，ロングスパンであれば小梁を節約でき，工
数を削減できるので，合成床板はロングスパンであるこ
とが望ましい。また，無被覆耐火構造は合成床板の大き
な特長の１つである。したがって，無被覆耐火を満足さ
せかつロングスパンである合成床板の実現が望まれてい
るが，上述のように，主として火災時の耐力の面から例
えば４ｍ等のロングスパンの無被覆耐火構造の合成床板
は実現されていなかった。Considering the workability of the composite floorboard, if the span is long, the beam can be saved and the man-hours can be reduced. Therefore, it is desirable that the composite floorboard be long span. The uncoated fireproof structure is one of the major features of synthetic floorboards. Therefore, it is desired to realize a synthetic floorboard that satisfies uncoated fireproof and has a long span, but as described above, mainly from the viewpoint of the proof strength in the case of fire, a synthetic uncoated fireproof structure with a long span such as 4 m is synthesized. The floorboard was not realized.
【０００８】また，図８に示した逆エンクロ構造のデッ
キプレート１の場合，建物の階高を節減できるメリット
はあるが，床自重の低減のためにデッキプレート１上の
コンクリート厚Ｓを耐力の許容範囲内で極力薄く設定し
た時，梁１１上のコンクリート厚が要求される所定の厚
みに不足する場合があり，頭付きスタッド１７を介して
梁１１と床とが一体に結合する合成梁としての性能が確
保できない場合があった。In addition, in the case of the deck plate 1 of the reverse enclosure structure shown in FIG. 8, there is a merit that the floor height of the building can be saved, but the concrete thickness S on the deck plate 1 is reduced in yield strength in order to reduce the floor weight. When the thickness is set as thin as possible within the allowable range, the concrete thickness on the beam 11 may be insufficient to the required predetermined thickness, and as a composite beam in which the beam 11 and the floor are integrally connected via the headed stud 17. There was a case where the performance of could not be secured.
【０００９】本発明は上記背景のもとになされたもの
で，合成床板としての高い耐力を効率的に実現して，ロ
ングスパンでかつ無被覆耐火構造を満足し，施工性がよ
く，かつ階高の節約を図ることができ，さらに，合成梁
の効果を確保することが可能な合成床板，およびこの合
成床板の構築に使用する合成床板用デッキプレートを提
供することを目的とする。The present invention has been made based on the above background, and efficiently realizes a high proof stress as a synthetic floorboard, satisfies a long span and an uncoated fireproof structure, has a good workability, and has a floor. It is an object of the present invention to provide a synthetic floorboard which can save a high cost and can secure the effect of a synthetic beam, and a deck plate for a synthetic floorboard used for constructing the synthetic floorboard.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決する本発
明は，山部と谷部とを交互に持ち谷部内のコンクリート
を上下方向に拘束することができる断面形状の合成床板
用デッキプレートを用いて合成床板を構築する合成床板
施工方法であって，前記合成床板用デッキプレートの長
手方向の両端部をそれぞれ上下から押し潰してデッキプ
レートの丈の中間高さ位置にほぼ平坦な鉄骨梁載置部を
形成するとともに，この合成床板用デッキプレートの両
端を１スパンの梁間に掛け渡し，前記の梁間に掛け渡し
た合成床板用デッキプレートの上方に溶接金網を配置
し，かつデッキプレートの谷部内にデッキプレート長手
方向に延びる鉄筋を配置してコンクリートを打設するこ
とを特徴とする。なお，デッキプレートの断面形状自体
はコンクリートを上下方向に拘束する形状であるが，合
成床板に荷重が作用した時，デッキプレートはコンクリ
ートを上下方向および長手方向に拘束する。すなわち，
合成床板には，荷重が作用した時デッキプレートとコン
クリートとの間に上下方向に剥離する力と長手方向にず
れる力とが作用するが，デッキプレートがコンクリート
を直接的には上下方向に拘束することによって，デッキ
プレートとコンクリートとの間の付着力および曲げ剛性
の差により，長手方向のずれも拘束することになる。ま
た，平坦な鉄骨梁載置部を形成する上記の中間高さ位置
は，デッキプレートの丈に対して上から１／３〜１／４
の高さ位置が適切である。DISCLOSURE OF THE INVENTION The present invention for solving the above problems provides a deck plate for a synthetic floorboard having a cross-sectional shape capable of alternately holding peaks and valleys and vertically restraining concrete in the valleys. A method for constructing a composite floorboard using the method, comprising: crushing both longitudinal ends of the deck plate for the composite floorboard from above and below to mount a substantially flat steel beam at an intermediate height position of the length of the deckplate. Along with the formation of the placing part, both ends of this deck plate for the composite floor board are spanned between the beams of one span, and the welded wire mesh is arranged above the deck plate for the synthetic floor board spanned between the beams, and the valley of the deck plate is arranged. It is characterized in that the reinforcing bars extending in the longitudinal direction of the deck plate are arranged in the section and concrete is poured. The cross-sectional shape of the deck plate itself constrains the concrete in the vertical direction, but when a load is applied to the composite floor board, the deck plate constrains the concrete in the vertical direction and the longitudinal direction. That is,
When a load is applied to the composite floor plate, a vertical separation force and a longitudinal displacement force act between the deck plate and concrete, but the deck plate directly constrains the concrete in the vertical direction. As a result, the displacement in the longitudinal direction is also restrained due to the difference in adhesive strength and bending rigidity between the deck plate and concrete. Further, the above-mentioned intermediate height position forming the flat steel beam mounting portion is 1/3 to 1/4 from the top with respect to the height of the deck plate.
The height position of is appropriate.
【００１１】請求項２は前記合成床板施工方法に使用す
る合成床板用デッキプレートであって，ほぼ台形状の山
部とほぼ逆台形状の谷部とが斜辺部分を共有して交互に
形成されるように水平な頂面部と傾斜ウエブと水平な底
面部とが連続し，左右両端の頂面部の端縁部に，隣接す
るものどうしが互いに係合する形状の係合部を備え，前
記底面部または傾斜ウエブの一方または両方に，打設さ
れた谷部のコンクリートを上下方向に拘束することがで
きる横方向突出部を備え，デッキプレート長手方向の両
端部に，各端部を上下から押し潰して形成した，頂面部
と底面部との中間の高さ位置に形成されるほぼ平坦な鉄
骨梁載置部を備えたことを特徴とする。According to a second aspect of the present invention, there is provided a deck plate for a synthetic floorboard used in the method for constructing a synthetic floorboard, wherein a substantially trapezoidal peak portion and a substantially inverted trapezoidal valley portion are alternately formed so as to share a hypotenuse portion. The horizontal top surface portion, the inclined web and the horizontal bottom surface portion are continuous, and the top and bottom edge portions of the left and right ends are provided with engaging portions in a shape in which adjacent ones engage with each other. Sections or inclined webs, or both, are provided with lateral protrusions that can vertically restrain the cast concrete in the troughs, and push both ends from the top and bottom to both ends in the longitudinal direction of the deck plate. It is characterized in that it is provided with a substantially flat steel beam mounting portion formed at a height intermediate between the top surface portion and the bottom surface portion formed by crushing.
【００１２】[0012]
【作用】上記の合成床板施工方法により構築された合成
床板は，谷部にデッキプレート長さ方向に延びる鉄筋を
配置しているので，この鉄筋が常温時の耐力を向上させ
るとともに，加熱時には耐火補強筋として機能する。ま
た，１スパン単純支持方式としデッキプレートの丈の中
間高さ位置に平坦な鉄骨梁載置部を形成（これを中間エ
ンクロ構造と称する）しているので，この中間エンクロ
構造が逆エンクロ構造と同様にデッキプレートとコンク
リートとの間のずれを拘束する作用を有効に果たし，合
成床板としての耐力を向上させる。これらにより，例え
ば４ｍ以上等のロングスパンでかつ無被覆耐火構造の合
成床板を得ることが可能となる。[Function] Since the synthetic floorboard constructed by the above-mentioned synthetic floorboard construction method has the reinforcing bars arranged in the troughs extending in the length direction of the deck plate, the reinforcing bars improve the proof stress at room temperature and the fireproofing at the time of heating. Functions as a reinforcing bar. In addition, since the single-span simple support method is used and a flat steel beam mounting portion is formed at the middle height position of the length of the deck plate (this is called the intermediate enclosure structure), this intermediate enclosure structure is called the reverse enclosure structure. Similarly, it effectively acts to restrain the gap between the deck plate and concrete, and improves the yield strength as a synthetic floorboard. As a result, it is possible to obtain a synthetic floorboard having a long span of 4 m or more and an uncoated fireproof structure.
【００１３】また，鉄骨梁載置部が逆エンクロ構造の一
種である中間エンクロ構造であり，単に底面部を梁上に
載置した場合と比べて頂面部を低くすることができるか
ら，建物の階高を節減することができる。一方，単なる
逆エンクロ構造でなく中間エンクロ構造であり，頂面部
が梁の上面より上方に位置するから，頂面部上のコンク
リート厚を薄くしても，梁上のコンクリート厚は十分厚
く取ることができ，梁上に垂直に溶接固定した頭付きス
タッドによる合成梁の効果を確保することができる。Further, since the steel beam placing portion is an intermediate enclosure structure, which is a kind of reverse enclosure structure, the top surface portion can be lowered as compared with the case where the bottom portion is simply placed on the beam. The floor height can be saved. On the other hand, since it is not a reverse enclosure structure but an intermediate enclosure structure and the top surface is located above the top surface of the beam, even if the concrete thickness on the top surface is thin, the concrete thickness on the beam can be made sufficiently thick. Therefore, the effect of the composite beam can be secured by the headed stud vertically welded and fixed on the beam.
【００１４】請求項２の合成床板用デッキプレートは，
上記の合成床板施工方法に用いるのに適切である。特
に，左右両端の頂面部にデッキプレートを接続する係合
部を設けているので，中間エンクロ構造とする上で適切
である。A deck plate for a synthetic floorboard according to claim 2 is
It is suitable for use in the above synthetic floorboard construction method. Particularly, since the engaging portions for connecting the deck plates are provided on the top surface portions on both the left and right ends, it is suitable for the intermediate enclosure structure.
【００１５】[0015]
【実施例】以下，本発明の合成床板施工方法および合成
床板用デッキプレートの一実施例を図１〜図４を参照し
て説明する。図１は本発明方法による合成床板の横断面
図，図２は縦断面図である。また，図１の合成床板にお
ける合成床板用デッキプレートの断面形状の詳細を図３
に示す。この合成床板用デッキプレート２１は，ほぼ台
形状の山部Ａとほぼ逆台形状の谷部Ｂとが斜辺部分を共
有して交互に形成されるように水平な頂面部２２と傾斜
ウエブ２３と水平な底面部２４とが連続し，左右両端の
頂面部２２の端縁部に，隣接するものどうしが互いに係
合する形状の係合部２５，２６を備え，前記傾斜ウエブ
２３に折曲段部２７を持ち，前記底面部２４の中央に鍵
溝状凸部２８を持つ断面形状である。前記折曲段部２７
あるいは鍵溝２８により，打設された谷部のコンクリー
トを上下方向に拘束する横方向突出部２７ａ，２８ａ
（折曲段部２７あるいは鍵溝２８の一部分である）を形
成している。また，頂面部２２には，この頂面部２２の
剛性を高めるために，デッキプレート長手方向に延びる
Ｖ溝状のリブ２９を形成している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the synthetic floorboard construction method and the synthetic floorboard deck plate of the present invention will be described below with reference to FIGS. FIG. 1 is a transverse sectional view of a synthetic floorboard produced by the method of the present invention, and FIG. 2 is a longitudinal sectional view thereof. In addition, details of the cross-sectional shape of the deck plate for the synthetic floorboard in the synthetic floorboard of FIG. 1 are shown in FIG.
Shown in. The synthetic floorboard deck plate 21 includes a horizontal top surface portion 22 and an inclined web 23 so that a substantially trapezoidal peak portion A and a substantially inverted trapezoidal valley portion B are alternately formed so as to share a hypotenuse portion. The horizontal bottom surface 24 is continuous, and the top and bottom edges 22 of the left and right ends are provided with engaging portions 25 and 26 in a shape in which adjacent ones engage with each other. It has a section 27 and a cross section having a key groove-shaped convex portion 28 at the center of the bottom surface portion 24. The bent step portion 27
Alternatively, the lateral projections 27a and 28a for vertically constraining the concrete in the cast valley portion by the keyway 28
(The bent step portion 27 or a part of the keyway 28) is formed. Further, the top surface portion 22 is formed with a V-groove-shaped rib 29 extending in the longitudinal direction of the deck plate in order to increase the rigidity of the top surface portion 22.
【００１６】そして，合成床板用デッキプレート２１の
両端部に，各端部を上下から押し潰してデッキプレート
の丈の中間高さ位置にほぼ平坦な鉄骨梁載置部３０を形
成している。このようにデッキプレートの中間高さ位置
に平坦な鉄骨梁載置部を形成した構造を中間エンクロ構
造と称する。この中間エンクロ構造は，鉄骨梁載置部３
０が底面部２４より上方にあるので，その点では逆エン
クロ構造の一種である。Then, at both ends of the deck plate 21 for the synthetic floorboard, the respective ends are crushed from above and below to form substantially flat steel beam mounting portions 30 at the middle height position of the length of the deck plate. The structure in which the flat steel beam mounting portion is formed at the intermediate height position of the deck plate is referred to as an intermediate enclosure structure. This intermediate enclosure structure has a steel beam mounting part 3
Since 0 is above the bottom surface portion 24, it is a kind of reverse enclosure structure in that respect.
【００１７】なお，この合成床板用デッキプレート２１
の各部の寸法の一例を示すと，図４（イ），（ロ）にお
いて，板厚ｔ＝１．０ｍｍまたは１．２ｍｍ，働き幅ａ
＝６００ｍｍ，谷部Ｂの頂面部高さ位置での幅ｂ＝１０
０ｍｍ，中央の頂面部２２の幅ｃ＝２００ｍｍ，底面部
２４の幅ｄ＝８０ｍｍ，谷部Ｂの深さｈ＝１２５ｍｍま
たは１５０ｍｍまたは１７５ｍｍ，折曲段部２７の頂面
部２２からの高さ位置ｉ＝４０ｍｍ（ｈ＝１２５ｍｍの
場合），中間エンクロ構造である鉄骨梁載置部３０の位
置の頂面部からの高さ寸法ｊ＝３０ｍｍ，鉄骨梁載置部
３０の長さｇ＝８０ｍｍ等である。左右の頂面部２２の
幅ｅ，ｆはｅ＋ｆ＝ｃ（＝２００ｍｍ）となるように設
定するが，左右を不等にして係合部２５，２６の接続位
置で頂面部２２が剛性不足にならないようにするとよ
い。上記のように，この合成床板用デッキプレート２１
は頂面部２２の幅を広く，谷部の幅を狭くかつ深くして
いる。The deck plate 21 for the synthetic floorboard
As an example of the dimensions of each part of Fig. 4 (a) and (b), the plate thickness t = 1.0 mm or 1.2 mm, the working width a
= 600 mm, the width b of the valley B at the height of the top surface b = 10
0 mm, width c of the central top surface portion 22 = 200 mm, width d of the bottom surface portion 24 = 80 mm, depth h of the valley portion B = 125 mm or 150 mm or 175 mm, height position of the bent step portion 27 from the top surface portion 22 i = 40 mm (in the case of h = 125 mm), the height dimension from the top surface of the position of the steel beam mounting portion 30 having the intermediate enclosure structure j = 30 mm, the length g of the steel beam mounting portion 30 = 80 mm, etc. is there. The widths e and f of the left and right top surface portions 22 are set to be e + f = c (= 200 mm), but the top surface portion 22 does not become insufficient in rigidity at the connecting position of the engaging portions 25 and 26 by making the left and right unequal. You should do so. As mentioned above, this deck plate 21 for synthetic floorboards
Has a wide top surface 22 and a narrow and deep valley.
【００１８】合成床板施工の際は，図２に示すように前
記合成床板用デッキプレート２１を単純支持方式で１ス
パンの梁３１間に掛け渡す。すなわち，合成床板用デッ
キプレート２１の両端の鉄骨梁載置部３０を梁３１上に
載置する。そして，デッキプレート２１の全面に溶接金
網３２を配置し，さらに，谷部Ｂにデッキプレート長手
方向に延びる鉄筋３３を耐火補強筋として配置して，コ
ンクリート３４を打設する。When constructing the composite floor board, the deck plate 21 for the composite floor board is bridged between the beams 31 of one span by a simple support method as shown in FIG. That is, the steel beam mounting portions 30 at both ends of the deck plate 21 for the synthetic floor board are mounted on the beam 31. Then, a welded wire net 32 is arranged on the entire surface of the deck plate 21, and further, a reinforcing bar 33 extending in the longitudinal direction of the deck plate is arranged as a fireproof reinforcing bar in the valley portion B, and concrete 34 is poured.
【００１９】上記方法により構築された合成床板は，デ
ッキプレート２１の谷部Ｂにデッキプレート長さ方向に
延びる鉄筋３３を配置しているので，この鉄筋３３が常
温時の耐力を向上させるとともに，加熱時には耐火補強
筋として機能する。また，１スパン単純支持方式としデ
ッキプレート２１の丈の中間高さ位置に平坦な鉄骨梁載
置部３０を形成した中間エンクロ構造としているので，
図９（ロ）で説明した逆エンクロ構造の作用と同じく，
デッキプレート２１とコンクリート３４との間の長手方
向のずれを拘束する作用を有効に果たし，合成床板とし
ての耐力を向上させる。これらにより，例えば４ｍ以上
等のロングスパンでかつ無被覆耐火構造の合成床板を得
ることが可能となった。また，頂面部２２の幅ｃを広
く，谷部の幅ｂを狭くかつ深さｈを深くしていること
で，谷部内のコンクリート量を少なくし床自重を軽減す
ることができる。この場合に，谷部が深くかつこの谷部
に鉄筋３３が存在することで，デッキプレート２１と鉄
筋３３とが大きな曲げ応力（引っ張り力）を受け持つこ
とができ，コンクリート厚を厚くすることなく合成床板
としての耐力を向上させることが可能である。In the composite floorboard constructed by the above method, the reinforcing bars 33 extending in the length direction of the deck plate are arranged in the valley portions B of the deck plate 21, so that the reinforcing bars 33 improve the proof stress at room temperature and It functions as a fireproof reinforcement bar when heated. Moreover, since it is a 1-span simple support system and has an intermediate enclosure structure in which a flat steel beam mounting portion 30 is formed at an intermediate height position of the height of the deck plate 21,
Similar to the action of the reverse enclosure structure described in FIG. 9B,
The effect of restraining the longitudinal displacement between the deck plate 21 and the concrete 34 is effectively performed, and the yield strength as the synthetic floor board is improved. As a result, it has become possible to obtain a synthetic floorboard with a long span of 4 m or more and an uncoated fireproof structure. In addition, the width c of the top surface portion 22 is wide, the width b of the valley portion is narrow and the depth h is deep, so that the amount of concrete in the valley portion can be reduced and the floor weight can be reduced. In this case, since the trough is deep and the reinforcing bar 33 is present in this trough, the deck plate 21 and the reinforcing bar 33 can bear a large bending stress (tensile force), and the composite can be performed without increasing the concrete thickness. It is possible to improve the yield strength as a floor board.
【００２０】また，鉄骨梁載置部３０は逆エンクロの一
種である中間エンクロであり，単に底面部２４を梁３１
上に載置した場合と比べて頂面部２２を低くすることが
できるから，建物の階高を節減することができる。一
方，単なる逆エンクロでなく中間エンクロであり，頂面
部２２が梁３１の上面より上方に位置するから，頂面部
２２上のコンクリート厚Ｓ1 を薄くしても，梁３１上の
コンクリート厚Ｓ2 は十分厚く取ることができ，梁３１
上に垂直に溶接固定した頭付きスタッド３７による合成
梁の効果を確保することができる。なお，鉄骨梁載置部
３０の頂面部２２からの高さ寸法ｊは，デッキプレート
２１の丈ｈの１／３〜１／４が適切である。すなわち，
前記高さ寸法ｊが大き過ぎると，デッキプレートとコン
クリートとの長手方向のずれを拘束する力が不足し，高
さ寸法ｊが小さ過ぎると，梁上のコンクリート厚Ｓ2 が
薄くなって結合梁の効果が損なわれるおそれがあるの
で，上記のようにｊ＝１／３ｈ〜１／４ｈが適切であ
る。Further, the steel beam placing portion 30 is an intermediate enclosure which is a kind of reverse enclosure, and the bottom portion 24 is simply attached to the beam 31.
Since the top surface portion 22 can be made lower than in the case of being placed on the floor, the floor height of the building can be saved. On the other hand, since the top surface 22 is located above the upper surface of the beam 31 because it is an intermediate enclosure rather than just reverse enclosure, even if the concrete thickness S 1 on the top surface 22 is reduced, the concrete thickness S 2 on the beam 31 is reduced. Can be taken thick enough, beam 31
It is possible to secure the effect of the composite beam by the headed stud 37 that is vertically welded and fixed to the top. The height dimension j of the steel beam placing portion 30 from the top surface portion 22 is appropriately 1/3 to 1/4 of the height h of the deck plate 21. That is,
If the height dimension j is too large, the force for restraining the longitudinal displacement between the deck plate and the concrete is insufficient, and if the height dimension j is too small, the concrete thickness S 2 on the beam becomes thin and the combined beam Since the effect of 1 may be impaired, j = 1 / 3h to 1 / 4h is appropriate as described above.
【００２１】なお，本発明の施工方法は，鉄骨造の建物
に限定されるものではなく，鉄筋コンクリート造の建物
にも適用可能である。鉄筋コンクリート造の場合，鉄筋
コンクリート梁と合成床板とをコンクリート打設を同時
に行って一体に構築するとよい。The construction method of the present invention is not limited to a steel frame building, but can be applied to a reinforced concrete building. In the case of reinforced concrete construction, it is advisable to construct the reinforced concrete beam and the composite floorboard simultaneously by concrete placing.
【００２２】[0022]
【発明の効果】本発明によれば，谷部に耐火補強筋とし
て配置されたデッキプレート長さ方向に延びる鉄筋の存
在，１スパン単純支持方式とし鉄骨梁載置部として逆エ
ンクロ構造の一種である中間エンクロ構造を採用するこ
とによってデッキプレートとコンクリートとの間のずれ
を拘束するようにした構造等により，火災時耐力を向上
させることでき，例えば４ｍ以上等のロングスパンでか
つ無被覆間耐火構造の合成床板を得ることが可能となっ
た。これにより，小梁を節減することができ，施工の工
数削減が実現された。EFFECTS OF THE INVENTION According to the present invention, there is a reinforcing bar arranged in the valley as a fireproof reinforcing bar and extending in the longitudinal direction of the deck plate. By adopting a certain intermediate enclosure structure, the structure such that the displacement between the deck plate and the concrete is restrained can improve the proof stress during a fire. For example, it has a long span of 4 m or more and uncoated fire resistance. It became possible to obtain a synthetic floorboard with a structure. As a result, it is possible to reduce the number of beams and reduce the number of construction steps.
【００２３】中間エンクロ構造としたことにより，建物
の階高を節減することができるとともに，床自重の低減
のためにコンクリート厚を許容範囲内で極力薄くしても
梁上のコンクリート厚は十分厚く取ることができ，梁上
に垂直に溶接固定した頭付きスタッドによる合成梁の効
果を確保することが可能となった。By adopting the intermediate enclosure structure, it is possible to reduce the floor height of the building, and to reduce the floor weight, even if the concrete thickness is made as thin as possible within the allowable range, the concrete thickness on the beam is sufficiently thick. It is possible to secure the effect of a composite beam by means of a headed stud that is vertically welded and fixed onto the beam.
【図１】本発明の合成床板施工方法による合成床板の一
実施例を示す横断面図である。FIG. 1 is a cross-sectional view showing an example of a synthetic floorboard by a synthetic floorboard construction method of the present invention.
【図２】図１の合成床板の縦断面図である。2 is a vertical cross-sectional view of the synthetic floorboard of FIG.
【図３】図１の合成床板における合成床板用デッキプレ
ートの拡大断面図である。FIG. 3 is an enlarged cross-sectional view of a deck plate for a synthetic floorboard in the synthetic floorboard of FIG.
【図４】同じく合成床板用デッキプレートの，各部の寸
法を示すための断面図である。FIG. 4 is a sectional view showing the dimensions of each part of the deck plate for the synthetic floor board.
【図５】従来の合成床板の横断面図である。FIG. 5 is a cross-sectional view of a conventional synthetic floorboard.
【図６】従来の合成床板の縦断面図である。FIG. 6 is a vertical cross-sectional view of a conventional synthetic floorboard.
【図７】従来の合成床板用デッキプレートのエンクロ構
造を説明する図である。FIG. 7 is a diagram illustrating a conventional enclosure structure of a deck plate for a synthetic floorboard.
【図８】従来の合成床板用デッキプレートの逆エンクロ
構造を説明する図である。FIG. 8 is a diagram illustrating a reverse-enclosure structure of a conventional deck plate for a synthetic floorboard.
【図９】図８の逆エンクロ構造の合成床板に荷重が加わ
った時の逆エンクロ構造の作用を説明するための図で，
同図（イ）は逆エンクロ構造でない場合，同図（ロ）は
逆エンクロ構造の場合の説明図である。FIG. 9 is a view for explaining the action of the reverse-enclosure structure when a load is applied to the reverse-enclosure-structured composite floorboard of FIG.
The figure (a) is an explanatory diagram in the case of not having the reverse enclosure structure, and the figure (b) is an explanatory diagram in the case of the reverse enclosure structure.
２１ 合成床板用デッキプレート ２２ 頂面部 ２３ 傾斜ウエブ ２４ 底面部 ２５，２６ 係合部 ２７ 折曲段部 ２７ａ，２８ａ 横方向突出部 ２８ 鍵溝状凸部 ２９ リブ ３０ 鉄骨梁載置部 ３１ 梁 ３２ 溶接金網 ３３ 鉄筋 21 Synthetic Floor Board Deck Plate 22 Top Surface Part 23 Sloping Web 24 Bottom Part 25, 26 Engagement Part 27 Bending Step Part 27a, 28a Transverse Projection Part 28 Keyway-shaped Convex Part 29 Rib 30 Steel Beam Mounting Part 31 Beam 32 Welded wire mesh 33 Reinforcing bar
Claims (5)
クリートを上下方向に拘束することができる断面形状の
合成床板用デッキプレートを用いて合成床板を構築する
合成床板施工方法であって，前記合成床板用デッキプレ
ートの長手方向の両端部をそれぞれ上下から押し潰して
デッキプレートの丈の中間高さ位置にほぼ平坦な鉄骨梁
載置部を形成するとともに，この合成床板用デッキプレ
ートの両端を１スパンの梁間に掛け渡し，前記の梁間に
掛け渡した合成床板用デッキプレートの上方に溶接金網
を配置し，かつデッキプレートの谷部内にデッキプレー
ト長手方向に延びる鉄筋を配置してコンクリートを打設
することを特徴とする合成床板施工方法。1. A synthetic floorboard construction method for constructing a synthetic floorboard by using a deck plate for a synthetic floorboard having a cross-sectional shape capable of alternately holding peaks and valleys and vertically restraining concrete in the valleys. And crushing both longitudinal ends of the synthetic floorboard deck plate from above and below to form a substantially flat steel beam mounting portion at an intermediate height position of the length of the deck plate, and the synthetic floorboard deck plate Both ends of the bridge are bridged between beams of one span, a welded wire mesh is arranged above the deck plate for the composite floor board bridged between the beams, and a reinforcing bar extending in the longitudinal direction of the deck plate is arranged in the valley of the deck plate. A method for constructing a synthetic floorboard, which comprises placing concrete.
板用デッキプレートであって，ほぼ台形状の山部とほぼ
逆台形状の谷部とが斜辺部分を共有して交互に形成され
るように水平な頂面部と傾斜ウエブと水平な底面部とが
連続し，左右両端の頂面部の端縁部に，隣接するものど
うしが互いに係合する形状の係合部を備え，前記底面部
または傾斜ウエブの一方または両方に，打設された谷部
のコンクリートを上下方向に拘束することができる横方
向突出部を備え，デッキプレート長手方向の両端部に，
各端部を上下から押し潰して形成した，頂面部と底面部
との中間の高さ位置に形成されるほぼ平坦な鉄骨梁載置
部を備えたことを特徴とする合成床板用デッキプレー
ト。2. A synthetic floorboard deck plate used in the method for constructing a synthetic floorboard, wherein substantially trapezoidal peaks and substantially inverted trapezoidal troughs are alternately formed with the hypotenuses shared. A horizontal top surface portion, an inclined web, and a horizontal bottom surface portion are continuous with each other, and at the end edges of the top surface portions at the left and right ends, an engaging portion having a shape in which adjacent ones engage with each other is provided. One or both of the sloping webs is equipped with lateral projections that can vertically restrain the cast concrete in the valleys, and at both ends in the longitudinal direction of the deck plate,
A deck plate for a synthetic floorboard, comprising a substantially flat steel beam mounting portion formed at an intermediate height position between a top surface portion and a bottom surface portion, which is formed by crushing each end portion from above and below.
方に突出する蟻溝状凸部によって形成されたことを特徴
とする請求項２記載の合成床板用デッキプレート。3. The deck plate for the synthetic floor board according to claim 2, wherein the laterally protruding portion of the bottom surface of the valley portion is formed by a dovetail groove-shaped convex portion protruding upward.
ウエブの中間部を段差状に折曲して形成した折曲段部に
より形成されたことを特徴とする請求項２記載の合成床
板用デッキプレート。4. The synthetic floorboard according to claim 2, wherein the laterally protruding portion of the inclined web is formed by a bent step portion formed by bending an intermediate portion of the inclined web into a step shape. Deck plate for.
に延びるＶ溝状のリブを形成したことを特徴とする請求
項２記載の合成床板用デッキプレート。5. The deck plate for a synthetic floor board according to claim 2, wherein a V-groove-shaped rib extending in the longitudinal direction of the deck plate is formed on the top surface portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4144891A JP2759580B2 (en) | 1992-05-11 | 1992-05-11 | Synthetic floorboard construction method and deck plate for synthetic floorboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4144891A JP2759580B2 (en) | 1992-05-11 | 1992-05-11 | Synthetic floorboard construction method and deck plate for synthetic floorboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05311794A true JPH05311794A (en) | 1993-11-22 |
| JP2759580B2 JP2759580B2 (en) | 1998-05-28 |
Family
ID=15372758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4144891A Expired - Lifetime JP2759580B2 (en) | 1992-05-11 | 1992-05-11 | Synthetic floorboard construction method and deck plate for synthetic floorboard |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2759580B2 (en) |
Cited By (7)
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|---|---|---|---|---|
| JP2007070956A (en) * | 2005-09-09 | 2007-03-22 | Nippon Steel & Sumikin Metal Products Co Ltd | Deck plate |
| JP2007077646A (en) * | 2005-09-13 | 2007-03-29 | Nippon Steel & Sumikin Metal Products Co Ltd | Deck plate |
| JP2007077645A (en) * | 2005-09-13 | 2007-03-29 | Nippon Steel & Sumikin Metal Products Co Ltd | Deck plate |
| JP2007177512A (en) * | 2005-12-28 | 2007-07-12 | Nippon Steel & Sumikin Metal Products Co Ltd | Deck plate construction end width adjustable plate and deck plate construction structure |
| CN103643761A (en) * | 2013-12-21 | 2014-03-19 | 陈津辰 | Novel composite board |
| CN108396898A (en) * | 2018-04-19 | 2018-08-14 | 山东永固绿建科技有限公司 | A kind of production method of inverted trapezoidal rib laminated floor slab |
| JP2020041348A (en) * | 2018-09-12 | 2020-03-19 | 大成建設株式会社 | Composite deck slab |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007070956A (en) * | 2005-09-09 | 2007-03-22 | Nippon Steel & Sumikin Metal Products Co Ltd | Deck plate |
| JP4711294B2 (en) * | 2005-09-09 | 2011-06-29 | 日鐵住金建材株式会社 | Deck plate |
| JP2007077646A (en) * | 2005-09-13 | 2007-03-29 | Nippon Steel & Sumikin Metal Products Co Ltd | Deck plate |
| JP2007077645A (en) * | 2005-09-13 | 2007-03-29 | Nippon Steel & Sumikin Metal Products Co Ltd | Deck plate |
| JP4633586B2 (en) * | 2005-09-13 | 2011-02-16 | 日鐵住金建材株式会社 | Deck plate |
| JP4711295B2 (en) * | 2005-09-13 | 2011-06-29 | 日鐵住金建材株式会社 | Deck plate |
| JP2007177512A (en) * | 2005-12-28 | 2007-07-12 | Nippon Steel & Sumikin Metal Products Co Ltd | Deck plate construction end width adjustable plate and deck plate construction structure |
| CN103643761A (en) * | 2013-12-21 | 2014-03-19 | 陈津辰 | Novel composite board |
| CN108396898A (en) * | 2018-04-19 | 2018-08-14 | 山东永固绿建科技有限公司 | A kind of production method of inverted trapezoidal rib laminated floor slab |
| JP2020041348A (en) * | 2018-09-12 | 2020-03-19 | 大成建設株式会社 | Composite deck slab |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2759580B2 (en) | 1998-05-28 |
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