JPS605947A - Floor structure of construction - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floor structure of a building, and in particular allows the construction to be made wider than the beam width and the beam height lower.

Traditionally, the beams of structures were usually narrower than the width of the beams. Therefore, when using a cylindrical sheath with prestressed steel wires passed through it as reinforcement for a beam, the arrangement must be considered so that the knotted sheath does not intersect with the reinforcing bars of the column, and the cylindrical sheath and reinforcing bars for the crosspiece must be Concrete placement in areas where two parts were close to each other was sometimes inappropriate.

Therefore, the present invention makes the beam width wider than the crosspiece width, lowers the beam height while maintaining sufficient beam strength, and injects cement paste into the sheath to integrate the steel wire and the outer concrete into the floor. The purpose of this invention is to provide sufficient space between the cylindrical sheath as a beam reinforcement material and the column layer reinforcing bars, and to facilitate the construction of a floor structure.

Next, the floor structure of the structure of the present invention will be explained with reference to the drawings. f
The height of the beams 2 between each pillar 1 of a building is approximately 1 of the span length.
/20, and the normal beam height is approximately 1/1 of the span length.
0, and the beam width is narrower than the normal crosspiece width, but it is wider than the crosspiece width and has a flat shape.

A cylindrical sheath 4 in which a plurality of stranded PC steel wires 3 are passed is placed on both sides of the beam 2 in the longitudinal direction outside the column 1.

By arranging the cylindrical sheath 4 in this manner, the cylindrical sheath 4 does not intersect with the reinforcing bars of the column 1, etc., so that its arrangement and the concrete pouring of the beam are facilitated. Note that the cylindrical sheath 4 is embedded within the beam by pouring concrete into the beam.

Inside the beam 2, the cylindrical sheath 4 is arranged so as to be convex on the tension side of the beam, corresponding to the bending moment gradient. P
The C steel stranded wire 3 is given tension and its both ends are fixed to the concrete 1/end 1 part of the beam via fixing fittings to provide reinforcement against the bending moment of the beam.

Cement paste 5 is filled into the cylindrical sheath 4, and P
The gland 3 and the cylindrical sheath 4 are integrally joined using C steel. The cylindrical sheath 4 is formed by continuous elongated metal plates in a spiral shape, and by pouring concrete at the beam, the cylindrical sheath 4 becomes integrally connected to the concrete.As a result, the PC The steel strands 3 are integrally connected to the concrete of the beam and can resist external forces.

Next, the placement of reinforcement materials on the floor slab of the structure will be explained.

Flat cylindrical flat sheaths 6 with PC steel strands 3 passed through them are placed vertically and horizontally on a floor slab 7 of m%f building. In the floor slab 7, the flat sheath 6 is arranged so as to have a laterally elongated cross section, and is further arranged to have a convex shape on the beam tension side in accordance with the bending moment gradient of the floor slab. Fix both ends of the PC steel stranded wire 3 to the concrete end of the beam or floor slab via fixing fittings, and
is given tension force to strengthen the floor slab 7 against bending moments.

Filling the flat sheath 6 with cement paste 5,
The pc#l stranded wire 3 and the flat sheath 6 are joined together. The flat sheath 6 is formed into a flat cylindrical shape by connecting elongated metal plates in a spiral shape.
)・is integrally connected with k. As a result, PC@
The strands 3 are integrally connected to the concrete of the floor slab and can resist external forces.

Although the flat sheath 6 in the shape of a flat cylinder was used in the floor slab described above, the floor slab may be constructed using unbonded steel stranded wire 8 instead (FIG. 6). In addition, for unbonded steel stranded wire, apply rust preventive material to wire 3 from PC steel.
It is covered with a covering material, and the PC steel stranded wire 3 is tensioned and both ends are fixed to the concrete end of the beam or floor slab.

The floor structure of the structure of the present invention is as described above, and since the beam width is formed wider than the crosspiece width and is reinforced with a sheath made of prestressed steel, the height of the beam can be lowered. Furthermore, since the sheath, which is made of a PC steel strand, is placed outside the column in the longitudinal direction of the beam, it does not intersect with reinforcing bars for crosspieces, etc., making it easier to construct the floor structure.

[Brief explanation of drawings]

Figure 1 is a plan sectional view of the floor structure of a "flt" building, Figure 2 is a sectional view taken along the [-TI line in Figure 1, Figure 3 (mainly
-■ line sectional view, Figure 4 is an enlarged sectional view of the main part of Figure 3, Figure 5
The figure is an enlarged sectional view taken along the line v-V of FIG. 1, and FIG. 6 is an enlarged sectional view corresponding to FIG. 5. 2... Beam 3... Bond from PC steel 4... Cylindrical sheath 5... Cement paste 6.
...Flat Sheath 7...Floor Slab Applicant: Mononaka Construction Co., Ltd. Agent, Patent Attorney: Ryo Ima Oka, Non-゛. Figure 4 Figure 5 Figure 6 Continuation of page 1 0 Author: Yamaguchi Spine Takenaka Corporation Technical Research Institute, 2-5-14 Minamisuna, Koto-ku, Tokyo 0 Author: Katsuya Okada Minamisuna, Koto-ku, Tokyo 2-5-14 Takenaka Corporation Technical Research Institute 0 Inventor: Haruhiko Okamoto 2-5-14 Minamisuna, Koto-ku, Tokyo Takenaka Corporation Technical Research Institute

Claims (2)

[Claims] (1) The beam of the structure is formed wider than the width of the crosspiece, and the beam is a cylindrical sheath with steel strands passed through it.It is placed on both sides outside the column in the longitudinal direction of the beam, and the steel strands inside the cylindrical sheath are The steel strands are tensioned and both ends are fixed to the concrete ends of a beam or floor slab, the cylindrical sheath is filled with cement paste, the steel strands and the cylindrical sheath are joined together, and the steel strands are passed through. Flat cylindrical flat sheaths are placed vertically and horizontally on the floor slab of the structure, and the steel strands inside the flat sheath are tensioned and both ends are fixed to the concrete ends/parts of the beam or floor slab, and cement paste is placed inside the flat sheath. A floor structure of a building that is filled with steel strands and a flat sheath. (2) The beam of the structure is formed wider than the crosspiece width, and a cylindrical sheath with steel strands passed through it is placed in the longitudinal direction of the beam and outside of the column punch, and the steel strands inside the cylindrical sheath are Tension and fix both ends to the concrete ends of the beam, fill the cylindrical sheath with cement paste to join the steel strands and the cylindrical sheath together, and connect the unbonded steel strands to the length and width of the floor slab of the structure. The floor structure of a structure in which the unpounded steel strands are taut and fixed at both ends to the concrete ends of beams or floor slabs.