JPH0567735B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a joint structure between a column steel frame such as a steel column or a steel reinforced concrete column and a concrete member as a beam member in a building structure.

[Conventional technology]

Conventionally, in a building structure in which a column steel frame is joined to a reinforced concrete member at right angles, for example, in a building structure in which a column steel frame is embedded and joined to a foundation beam, as shown in Fig. In order to prevent the column steel frame 2 from colliding with the reinforcing bars 7 reinforcing the foundation beam 3, the spacing between the reinforcing bars 7 is widened and concrete is cast.

Further, as shown in FIG. 5, a foundation beam 3 is formed by welding a steel frame 11 to the leg of a column steel frame 2 in advance, welding reinforcing bars thereto and pouring concrete on site.

[Problem to be solved by the invention]

However, in the conventional building structure, there is a problem in that the width L of the foundation beam 3 protrudes beyond the width of the column steel frame 2 and becomes larger than necessary in the case shown in FIG. 4.

In addition, in the case of Fig. 5, reinforcing bars 7 with a circular cross section are overlapped and welded on a flat steel frame 11 as shown in Fig. 6, but this welding is performed at the welded part as shown in Fig. 7. Since it has thick and thin parts, it is technically difficult and lacks reliability in terms of strength. In this way, the welding work between the column steel frame 2 and the steel frame 11 and the welding work between the steel frame 11 and the plurality of reinforcing bars 7 are performed on site, and the construction time is also increased due to the complexity of the erection work of the steel frame 11 and the reinforcing bar assembly work. The problem was that it was too long.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
To provide a joint structure between a column steel frame and a reinforced concrete member, which eliminates the need to unnecessarily increase the width of a concrete member reinforced with reinforcing bars, and which simplifies on-site welding work and shortens the construction period.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an architectural structure in which a column steel frame forming a steel column or a steel-frame reinforced concrete column is joined at right angles to a reinforced concrete member as a beam member, in which a plurality of bar-shaped protrusions with a circular cross section are provided at the tips. The rear end of the integrally provided plate-shaped intermediate member is firmly fixed to the side surface of the column steel frame by groove welding, and the end of the reinforcing bar is butted against the tip of each of the rod-shaped protrusions, and the reinforcing bar is The purpose is to form a reinforced concrete member made of concrete reinforced with.

[Effect]

According to the present invention, reinforcing reinforcing bars for a concrete member serving as a beam member are attached to a column steel frame via an intermediate member. Therefore, since the reinforcing bars fit within the width of the steel column, there is no need to make the width of the concrete member unnecessarily large as in the past.

Furthermore, since the rear end of the intermediate member is groove welded to the side surface of the column steel frame, the contact surface of the weld bead increases, making it possible to perform highly reliable welding. Further, since the plurality of rod-shaped protrusions provided at the tip of the intermediate member join the ends of the plurality of reinforcing bars by abutting against the tips thereof, a strong joint can be obtained.

This bar-shaped protrusion functions as a part of the reinforcing bar, and the base part to which the most force is applied from the reinforcing bar as a beam is integrated with the intermediate member, so it is strong.

Note that welding work at the site can be reduced by fixing the intermediate member to the steel column before transporting it to the site.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing one embodiment of the joining structure of the present invention.

Flange 6 of column steel frame 2 continuous to superstructure
Then, the intermediate member 4 is made of a horizontal plate having approximately the same width as the flange 6, and is integrally provided with a plurality (three in the figure) of short and small bar-shaped protrusions 5 having a circular cross section at the tip thereof. Weld.

As shown in FIG. 2, this intermediate member 4 has a notch-shaped groove 8 formed at an angle along the longitudinal direction at the rear end where it is welded to the flange 6. The metal accumulates to form a weld bead 9, making it possible to perform highly reliable welding.

The column steel frame 2 to which the intermediate member 4 is fixed in advance in this way
are brought to the construction site, and as shown in Fig. 3, the ends of reinforcing bars 7 are joined to the tips of each of the bar-like protrusions 5 of the intermediate member 4, and these reinforcing bars 7 are poured into concrete as reinforcing members, and the beams are made into concrete. The reinforced concrete member 3 is formed to complete the joint 1. In addition, in this FIG. 3, the illustration of the through reinforcing bars arranged outside the reinforcing bars 7 is omitted.

It is preferable to join the bar-like protrusion 5 and the reinforcing bar 7 by heat pressure welding using a gas flame or the like, but they may also be joined by welding or threaded joints.
can be obtained.

In addition, although the said Example demonstrated the reinforced concrete member 3 as a foundation beam, this invention is applicable also to the case of a beam member on the ground.

〔Effect of the invention〕

As described above, the joint structure of the column steel frame and reinforced concrete member of the present invention has high reliability in the joint between the column steel frame and the reinforcing bars for concrete members, and requires a wider width of the reinforced concrete member than the conventional joint structure. There is no need to make it larger. In addition, since it is only necessary to join the reinforcing bars and place concrete on site, the number of man-hours required is reduced, and a strong joint structure can be obtained while reducing construction costs.

[Brief explanation of drawings]

Figure 1 is a perspective view showing one embodiment of the joint structure of the present invention before concrete is poured, and Figure 2 is a perspective view of the joint structure of the present invention before concrete is poured.
Fig. 3 is a partially sectional perspective view showing an example of concrete being poured into the joint structure shown in Fig. 1; Fig. 4 is a partially sectional perspective view of the conventional joint structure; FIG. 5 is a partially sectional perspective view of the conventional joint structure, FIG. 6 is a perspective view showing the joined state of the reinforcing bars in FIG. 5, and FIG. 7 is a vertical sectional side view of the same essential parts. 1...Joint part, 2...Column steel frame, 3...Concrete member, 4...Intermediate member, 5...Protrusion part, 6...
...flange, 7... reinforcing bar, 8... welding groove, 9...
...Weld bead, 10...Joint part, 11...Steel frame.

Claims (1)

[Claims] 1. In an architectural structure in which a column steel frame forming a steel frame column or a steel-frame reinforced concrete column is joined at right angles to a reinforced concrete member serving as a beam member, a plate-shaped intermediate portion having a plurality of rod-shaped protrusions with a circular cross section integrally provided at the tip. A reinforced concrete member made of concrete in which the rear end of the member is firmly attached to the side surface of the column steel frame by groove welding, the end of the reinforcing bar is butted against the tip of each of the bar-shaped protrusions, and the reinforced concrete member is reinforced with the reinforcing bar. A joint structure between a column steel frame and a reinforced concrete member, which is characterized by forming a .