JPS605954A - Beam 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 beam structure for a building, and in particular, uses a flat cylindrical flat sheath as a reinforcing material for the beam so that the height of the beam can be reduced.

Conventionally, as a reinforcing material for a beam of a structure, a material in which a prestressed steel strand is passed through a sheath having a circular cross section, and a gap between the sheath and the prestressed copper strand is filled with cement paste has been used.

However, since such reinforcing materials have a circular cross section, the height of the beam increases, resulting in an increase in the building height, which is disadvantageous.

In addition, without using a sheath, the beams are made of copper, coated with a rust preventive material and covered with a covering material, for the reinforcement of the beam. However, in this case, the steel strands are not integrally connected to the concrete in the middle, so the reinforcing effect against earthquake forces is limited.

Therefore, the present invention uses a flat cylindrical flat sheath to lower the height of the beam. In addition, the beam width is made wider than the crosspiece width, and flat sheaths are placed in the longitudinal direction of the beam on both sides of the outside of the column to prevent the flat sheath from intersecting with crosspiece reinforcing bars, etc., making beam construction easier. The purpose is to

Next, the beam structure of the structure of the present invention will be explained with reference to the drawings. The height of the beam 2 between each column 1 of the structure is approximately 1/2 of the span length.
0, which is low compared to the normal beam height which is about 1/10 of the span length, and the beam width, which is narrower than the normal crosspiece width, is wider and flat than the crosspiece width.

A flat cylindrical flannel 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 flat sheath 4 in this manner, the flat sheath 4 does not intersect with the reinforcing bars of the column 1, etc., so its arrangement and concrete pouring of the beam become easy. The flat sheath 4 will be embedded within the beam when the beam is concreted.

Within the beam 2, the flat sheath 4 is arranged so as to have a horizontally elongated cross section, and is further arranged so as to have a convex shape on the beam tension side in accordance with the bending moment gradient of the beam. Both ends of the PC steel stranded wire 3 are fixed to the concrete end of the beam or floor slab at the position of the column 1 via fixing fittings, and the PC@stranded wire 3 is given tension to resist the bending moment of the beam. Reinforcement.

Cement paste 5 is filled inside the flat sheath 4, and the PC steel stranded wire 3 and the flat sheath 4 are integrally joined. The flat sheath 4 is formed into a flat cylindrical shape by connecting elongated metal plates in a spiral manner, and by pouring concrete into the beam, the flat sheath 4 is quickly connected to the concrete. As a result, due to the PC steel, t(ljl 3 is integrally connected to the concrete of the beam, and can resist external forces.

In the above explanation, a flat sheath was used to reinforce the beam, but instead, a wire stranded from PC steel is passed through the cylindrical sheath, the cylindrical sheath is placed inside the beam in the same manner as the flat sheath, and the cylindrical sheath is placed inside the beam in the same way as the flat sheath. The ends may be secured in the concrete of a beam or floor slab under tension, and cement paste may be injected into the cylindrical sheath.

The beam structure of the structure of the present invention is as described above. Since the 7 rat sheath is formed into a flat cylindrical shape, the height of the beam can be lowered. As a result, even in the case of multi-story 4) tXT rituals, the building height can be reduced. It is advantageous in terms of price or legal knowledge. In addition, the reinforcing material for the beam is a flat sheath filled with cement paste, etc., and the PC steel stranded wire and the flat sheath are integrally bonded, so the PC steel stranded wire is effectively resistant to external forces due to loading. It can be countered and is an excellent supplementary material for beams. Furthermore, since the flat sheath is placed outside the column part i in the longitudinal direction of the beam, it does not intersect with residential reinforcing bars, etc., making beam construction easier.

[Brief explanation of drawings]

Figure 1 is a plan sectional view of the floor structure of the building, and Figure 2132 is the first
FIG. 3 is a cross-sectional view of the beam taken along the shore-to-shore line in the figure, and FIG. 2... Beam 3... PC steel stranded wire 4... Flat sheath 5... Cement paste Figure 1 Figure 2 Figure 3 Takenaka Corporation Co., Ltd. 2-5-14 Minamisuna, Koto-ku, Tokyo Inventor: Katsuya Okada, 5-14 Minamisuna 2-chome, Koto-ku, Tokyo Takenaka Corporation; Inventor: Haruhiko Okamoto; 5-14 Minamisuna 2-chome, Koto-ku, Tokyo; Takenaka Corporation; Inside the Technology Research Institute

Claims (3)

[Claims] (1) The beam of the sacrificial object is formed wider than the width of the crosspiece, and a cylindrical sheath with wires threaded through it is placed in the longitudinal direction of the beam on both sides outside the column, and the steel in the sheath is A beam structure in which the wire is tensioned and fixed at both ends to the concrete end of the beam, and the sheath is filled with cement paste to join the steel stranded wire and sheath together. (2) The beam structure of the construct according to claim 1, wherein the sheath is formed into a flat cylindrical shape. (3) The beam structure of the construct according to claim 1, wherein the sheath is formed into a cylindrical shape.