JP2725532B2 - Prestressed concrete double T-type slab with stringing material - Google Patents
Prestressed concrete double T-type slab with stringing materialInfo
- Publication number
- JP2725532B2 JP2725532B2 JP4196997A JP19699792A JP2725532B2 JP 2725532 B2 JP2725532 B2 JP 2725532B2 JP 4196997 A JP4196997 A JP 4196997A JP 19699792 A JP19699792 A JP 19699792A JP 2725532 B2 JP2725532 B2 JP 2725532B2
- Authority
- JP
- Japan
- Prior art keywords
- slab
- string
- prestressed concrete
- double
- bundle
- 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.)
- Expired - Fee Related
Links
Landscapes
- Rod-Shaped Construction Members (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、建物の屋根スラブや
床スラブとして構築される張弦材付きプレストレストコ
ンクリートダブルＴ型スラブに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prestressed concrete double T-type slab with a string member constructed as a roof slab or a floor slab of a building.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】従
来、床スラブの大スパン化を可能にするために、床スラ
ブをダブルＴ型スラブ（ジョイストスラブ）とすると共
に、床スラブのコンクリート中にＰＣ鋼材を挿通してプ
レストレスを導入する方法が、現場施工若しくはＰＣ化
によって既に実施されている。2. Description of the Related Art Conventionally, in order to enable a floor slab to have a large span, a floor slab is formed as a double T-shaped slab (a joist slab) and a PC is embedded in concrete of the floor slab. A method of introducing a prestress by inserting a steel material has already been implemented by on-site construction or computerization.
【０００３】[0003]
【発明が解決しようとする課題】しかし、この種の床ス
ラブでも、大スパン化には自ずと限界があり、大スパン
とするには、スラブせいを大きくする必要があるため、
床スラブの重量が増し、また、スラブせいが大きくなっ
てデザイン上難点があるなどの課題があった。However, even with this type of floor slab, there is naturally a limit to increasing the span, and in order to increase the span, it is necessary to enlarge the slab.
There were problems such as an increase in the weight of the floor slab and an increase in the slab thickness, which caused difficulties in design.
【０００４】この発明はこのような課題を解決するため
になされたもので、スラブのせいを一定に保持したまま
でスラブの大スパン化を可能にした張弦材付きプレスト
レストコンクリートダブルＴ型スラブを提供することを
目的とする。The present invention has been made in order to solve such a problem, and provides a prestressed concrete double T-type slab with a string member which enables a large span of the slab while keeping the slab constant. The purpose is to:
【０００５】[0005]
【課題を解決するための手段】この発明に係る張弦材付
きプレストレストコンクリートダブルＴ型スラブは、ス
ラブをダブルＴ型断面形に構成するとともに上方向に湾
曲し、前記スラブの支点間に張弦材を架設し、かつ、前
記スラブと張弦材との間に束材を設置することにより構
成されている。A prestressed concrete double T-type slab with a string member according to the present invention has a double T-shaped cross section and is curved upward, and a string member is erected between fulcrums of the slab. And, it is constituted by installing a bundle material between the slab and the string material.
【０００６】[0006]
【実施例】図１〜図３は、この発明に係る張弦材付きプ
レストレストコンクリートダブルＴ型スラブの一実施例
を示し、図１は屋根スラブの縦断面図、図２は図１にお
けるＡ部詳細図、図３は図１におけるＢ部詳細図であ
る。そして、これらの図において、符号１は屋根スラブ
で、２は屋根スラブ１の支点間に架設された張弦材で、
３は張弦材２の中間部を支持する束材で、４は金属板等
からなる屋根葺き材である。1 to 3 show one embodiment of a prestressed concrete double T-type slab with a string member according to the present invention. FIG. 1 is a longitudinal sectional view of a roof slab, and FIG. 2 is a detailed view of a portion A in FIG. FIG. 3 is a detailed view of a portion B in FIG. In these figures, reference numeral 1 denotes a roof slab, reference numeral 2 denotes a string member erected between fulcrums of the roof slab 1,
Reference numeral 3 denotes a bundle supporting an intermediate portion of the string member 2, and reference numeral 4 denotes a roofing member made of a metal plate or the like.
【０００７】屋根スラブ１は、上側に一定の曲率で湾曲
し、かつ、スラブ1aと平行に架設された複数の梁1bとが
一体をなすダブルＴ型断面形に構成されている（ジョイ
ストスラブともいう）。また、必要により、この屋根ス
ラブ１にプレストレスを導入して補強するために、梁1b
下端のコンクリート中にＰＣ鋼材（図省略）が挿通され
ている。なお、この屋根スラブ１は、現場打ち鉄筋コン
クリートまたはプレキャスト鉄筋コンクリートによって
構成され、また、何れの場合にも、補強鉄筋の代わりに
炭素繊維などの補強繊維を使用することにより無筋構造
とされることもある。The roof slab 1 has a double T-shaped cross section in which the roof slab 1 is curved upward at a constant curvature and is integrated with a plurality of beams 1b laid in parallel with the slab 1a (also referred to as a joist slab). Say). In addition, if necessary, beams 1b are used to reinforce the roof slab 1 by introducing prestress.
A PC steel (not shown) is inserted into the concrete at the lower end. The roof slab 1 is made of cast-in-place reinforced concrete or precast reinforced concrete. In any case, the roof slab 1 may have a non-strength structure by using reinforcing fibers such as carbon fibers instead of reinforcing reinforcing bars. is there.
【０００８】張弦材２は、屋根スラブ１の下側に、屋根
スラブ１の短辺方向の支点間に架設されている。そし
て、この張弦材２は、図３に示すように、その両端が、
床スラブ１の支点におけるコンクリートに埋設されたア
ンカー部材５に回転自在に連結されていると共に、図２
に示すように、束材３に対しても回転自在に連結されて
いる。このように、張弦材２が床スラブ１（アンカー部
材５）と束材３とに回転自在に連結されていることは、
曲げ等の応力を回転することで吸収することができて、
張弦材２に加わる応力を単純に引張力だけにすることが
できる。[0008] The string member 2 is provided under the roof slab 1 between fulcrums in the short side direction of the roof slab 1. And, as shown in FIG. 3, both ends of this string material 2
While being rotatably connected to an anchor member 5 embedded in concrete at the fulcrum of the floor slab 1, FIG.
As shown in FIG. 2, the bundle 3 is also rotatably connected to the bundle 3. As described above, the fact that the string member 2 is rotatably connected to the floor slab 1 (anchor member 5) and the bundle member 3 is as follows.
By rotating the stress such as bending, it can be absorbed,
The stress applied to the string member 2 can be simply the tensile force.
【０００９】なお、この張弦材２はスラブの大きさに応
じて所定間隔をおいて架設されていると共に、各張弦材
２の中央部は床スラブ１に束材３によって支持されてい
る。また、張弦材２にはＰＣ鋼材等が使用されていると
共に、束材３には鉄骨材等が使用されている。The string members 2 are installed at predetermined intervals in accordance with the size of the slab, and the center of each string member 2 is supported by the floor slab 1 by the bundle 3. Further, a PC steel material or the like is used for the string member 2, and a steel frame material or the like is used for the bundle member 3.
【００１０】このような構成において、屋根スラブ１は
ダブルＴ型断面形に構成され、上側に一定曲率で湾曲し
て構成され、かつ、張弦材２によって湾曲状態を維持す
るように補強されていることにより、屋根スラブ１には
軸力（圧縮）が主体に作用し、構造的に不利な曲げ応力
は著しく低減される。また、張弦材２には引っ張り力の
みが作用する。従って、屋根スラブ１のせいを一定に保
持したままで屋根スラブの大スパン化が可能になる。In such a configuration, the roof slab 1 has a double T-shaped cross section, is curved upward at a constant curvature, and is reinforced by the tension member 2 so as to maintain the curved state. Accordingly, the axial force (compression) mainly acts on the roof slab 1, and the structurally disadvantageous bending stress is significantly reduced. Further, only the pulling force acts on the string material 2. Accordingly, it is possible to increase the span of the roof slab while keeping the roof slab 1 constant.
【００１１】しかも、張弦材２が床スラブ１（アンカー
部材５）と束材３とに回転自在に連結されていることに
よって、張弦材２に加わる曲げ等の応力を回転すること
で吸収することができて、張弦材２に加わる応力を単純
な引張力だけにすることができる。そのため、張弦材２
による床スラブ１に対する補強効果を確実なものとする
ことができる。Moreover, since the string 2 is rotatably connected to the floor slab 1 (anchor member 5) and the bundle 3, the bending and other stresses applied to the string 2 can be absorbed by rotation. Thus, the stress applied to the string member 2 can be made only a simple tensile force. Therefore, the string material 2
The reinforcement effect on the floor slab 1 by the above can be secured.
【００１２】[0012]
【発明の効果】この発明は以上説明したように構成さ
れ、スラブはダブルＴ型断面形に構成され、上側に一定
曲率で湾曲して構成され、かつ、張弦材によって湾曲状
態を維持するように補強されていることにより、スラブ
には軸力（圧縮）が主体に作用し、構造的に不利な曲げ
応力は著しく低減される。また、張弦材には引っ張り力
のみが作用する。従って、スラブのせいを一定に保持し
たままでスラブの大スパン化を図ることができる。The present invention is constructed as described above, and the slab has a double T-shaped cross section, is curved upward at a constant curvature, and is reinforced by a string member so as to maintain the curved state. As a result, an axial force (compression) mainly acts on the slab, and the structurally disadvantageous bending stress is significantly reduced. Further, only the pulling force acts on the string material. Therefore, it is possible to increase the span of the slab while keeping the slab constant.
【００１３】さらに、補強鉄筋の代わりに炭素繊維など
の補強繊維を使用して無筋構造とすることにより施工性
の向上を図ることもできる。また、スラブせいを大きく
する必要もないので、デザイン上の問題も解消される。Further, the workability can be improved by using a reinforcing fiber such as carbon fiber instead of the reinforcing steel bar to form a non-strength structure. Also, since it is not necessary to increase the slab tolerance, design problems are eliminated.
【００１４】しかも、張弦材をスラブと束材とに回転自
在に連結したことによって、張弦材に加わる曲げ等の応
力を回転することで吸収することができ、張弦材に加わ
る応力を単純な引張力だけにできる。そのため、張弦材
による床スラブに対する補強効果を確実なものにするこ
とができる。In addition, since the string member is rotatably connected to the slab and the bundle member, the bending and other stresses applied to the string member can be absorbed by rotation, and the stress applied to the string member can be reduced only by a simple tensile force. it can. Therefore, the reinforcing effect on the floor slab by the string members can be ensured.
【図１】この発明に係る張弦材付きプレストレストコン
クリートダブルＴ型床スラブの一実施例の縦断面図であ
る。FIG. 1 is a longitudinal sectional view of one embodiment of a prestressed concrete double T-type floor slab with a string member according to the present invention.
【図２】図１におけるＡ部拡大詳細図である。FIG. 2 is an enlarged detail view of a portion A in FIG.
【図３】図１におけるＢ部拡大詳細図である。FIG. 3 is an enlarged detail view of a portion B in FIG. 1;
１…屋根スラブ、２…張弦材、３…束材、４…屋根葺き
材、５…アンカー部材。DESCRIPTION OF SYMBOLS 1 ... Roof slab, 2 ... String material, 3 ... Bundle material, 4 ... Roofing material, 5 ... Anchor member.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−125742（ＪＰ，Ａ) 特開 平３−47354（ＪＰ，Ａ) 特開 平１−255507（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-125742 (JP, A) JP-A-3-47354 (JP, A) JP-A-1-255507 (JP, A)
Claims (1)
ともに上方向に湾曲し、前記スラブの支点間に張弦材を
架設し、かつ、前記スラブと張弦材との間に束材を設置
してなり、 前記張弦材は、前記スラブの下側においてスラブの短辺
方向の支点間に架設していると共に、前記スラブの支点
と前記束材とに回転自在として連結していることを特徴
とする張弦材付きプレストレストコンクリートダブルＴ
型スラブ。1. A slab having a double T-shaped cross section and curved upward, a string member is erected between fulcrum points of the slab, and a bundle member is installed between the slab and the string member. The string material is provided between the fulcrum in the short side direction of the slab below the slab and rotatably connected to the slab fulcrum and the bundle material. Prestressed concrete double T
Mold slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4196997A JP2725532B2 (en) | 1992-07-23 | 1992-07-23 | Prestressed concrete double T-type slab with stringing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4196997A JP2725532B2 (en) | 1992-07-23 | 1992-07-23 | Prestressed concrete double T-type slab with stringing material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0642180A JPH0642180A (en) | 1994-02-15 |
| JP2725532B2 true JP2725532B2 (en) | 1998-03-11 |
Family
ID=16367112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4196997A Expired - Fee Related JP2725532B2 (en) | 1992-07-23 | 1992-07-23 | Prestressed concrete double T-type slab with stringing material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2725532B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990073124A (en) * | 1999-05-21 | 1999-10-05 | 구민세 | 2nd Prestressing Method of Simple Prestressing Composite Beam Using PC Steel Bar |
| US20080053022A1 (en) * | 2006-07-13 | 2008-03-06 | Marschke Carl R | Hollow core floor and deck element |
| KR101631662B1 (en) * | 2015-01-30 | 2016-06-20 | 대진대학교 산학협력단 | Steel Framework System by using Prestressing-Components and Manufacturing Method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0747862B2 (en) * | 1986-11-14 | 1995-05-24 | 正照 新村 | Slab reinforcement equipment |
| JPH01255507A (en) * | 1988-04-06 | 1989-10-12 | Fujita Corp | Manufacture of prestress introduction semi-precast concrete component for long span slab |
| JPH0347354A (en) * | 1989-07-14 | 1991-02-28 | Tokyu Constr Co Ltd | Prestressing method for concrete slab and sleeve for cable with which beam is penetrated |
-
1992
- 1992-07-23 JP JP4196997A patent/JP2725532B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0642180A (en) | 1994-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19971104 |
|
| LAPS | Cancellation because of no payment of annual fees |