JPH0356572Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a beam material provided at the upper part of a wall in the span direction.

[Conventional technology]

This type of beam material is integrated with the wall to form a shear wall, but from the time the column steel frame is erected until the concrete of the wall develops the specified strength.
It serves as a temporary material to support the steel frame. Therefore, while being used as a temporary construction material, that is, until the concrete strength of the wall is developed, only the beam material must bear the load.
Great strength is required.

By the way, in the past, the fourth beam material was used as the above beam material.
As shown in the figure, since H-shaped steel b was used, it has the strength (bending rigidity and lateral torsional rigidity) that can withstand the forces that act during use as a temporary construction material.
Due to the need to ensure
As a result, a wide beam-shaped part d with a thickness considerably greater than that of wall a is formed on the upper part of wall a (the connecting part between floor slab c and wall a). The disadvantages were that the interior spaces e and e were narrowed and the appearance of the interior was poor.

[The problem that the idea aims to solve]

In view of the above-mentioned conventional drawbacks, the present invention has been developed to ensure sufficient strength to withstand the forces that act during use as a temporary construction material, while also being able to fit within the thickness of the wall in the tension direction, making it suitable for indoor use. The aim is to provide a beam material that makes effective use of space and improves aesthetics.

[Means to solve the problem]

The technical measures taken by the present invention to achieve the above objectives are as follows. That is, the beam material according to the present invention has a pair of upper and lower steel pipes in which mortar is injected into their internal hollow parts, and plates for connecting to the two columns at both ends in the tension direction are fixed to both ends of the pair, and the plates are fixed to both the upper and lower steel pipes. It is characterized by having reinforcing bars wrapped in a spiral shape and fixed in place.

[Effect]

According to the above configuration, mortar is injected into the internal hollow part of the steel pipe, which inherently has high bending rigidity and lateral torsional rigidity, to strengthen it, and two steel pipes with such a configuration are arranged above and below, and furthermore, both steel pipes are Since the beams are connected to each other using spirally wound reinforcing bars, steel pipes with the smallest possible diameter are used, and even if the width of the beam is narrow, it can withstand the forces that act on it when used as a temporary construction material. Sufficient strength can be obtained.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a longitudinal side view of a connecting portion between a floor slab 2 and an earthquake-resistant wall constituted by a longitudinal wall 1 and a beam 3 provided on the upper part thereof.

The beam material 3 has high-strength mortar 4 in the internal hollow part.
A reinforcing bar 6 is spirally wound around a pair of upper and lower steel pipes 5A and 5B injected with
The contact portions of A, 5B, and 6 are fixed by welding, and a column steel frame 12 is installed between each end of both steel pipes 5A, 5B.
A connecting plate 11 is fixed to the connecting plate 11 by welding.

In the figure, 7... is a hairpin plate fixed to the upper steel pipe 5A at appropriate intervals in the pipe length direction, and 8, 8 are supports placed and fixed on these hairpin plates 7... in the pipe length direction. The reinforcing bars 9... are reinforcing bars that are fixed in parallel on the supporting reinforcing bars 8, 8 at appropriate intervals in the longitudinal direction of the pipe, and these members 7..., 8, 8, 9... and floor slab 2
It is intended to be integrated with the Moreover, 10... are wall reinforcements stretched across the upper and lower beam members 3 in a mesh pattern.

FIGS. 2 and 3 show a connection and fixation structure of the beam material 3 at both ends in the tension direction to the column steel frame 12, and the connection has an H-shaped cross section welded to the ends of the pair of upper and lower steel pipes 5A, 5B. plate 11 and column steel frame 1
A gusset plate 13 welded to 2 is overlapped and connected and fixed with bolts and nuts 14.

In addition, 15 in the figure is the pair of upper and lower steel pipes 5A,
It is an annular iron plate that is fitted and welded to fixedly connect both ends of 5B.

[Effect of idea]

Since the present invention has the above-mentioned configuration, it is possible to maintain the strength of the beam while ensuring sufficient strength to withstand the force acting on the beam until the specified concrete strength is developed in the wall in the longitudinal direction. can be contained within the thickness of the wall, eliminating the need for a conventional beam-shaped part that protrudes toward the indoor side, making it possible to effectively utilize indoor space and improve aesthetics.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention,
FIG. 1 is a schematic vertical side view, FIG. 2 is a front sectional view of a main part, and FIG. 3 is a view taken along the line X--X in FIG. 2.
FIG. 4 is a schematic longitudinal sectional side view showing a conventional example. 4... Mortar, 5A, 5B... Steel pipe, 6...
Rebar.

Claims (1)

[Claims for Utility Model Registration] (1) Connecting plates for the two columns at both ends in the tension direction are fixed to both ends of a pair of upper and lower steel pipes with mortar injected into their internal hollow parts, and both the upper and lower steel pipes are A beam material characterized by having reinforcing bars wrapped and fixed in a spiral shape. (2) The beam material according to claim 1, wherein the mortar injected into the internal hollow portion of each steel pipe is a high-strength mortar.