JPH0740561Y2 - Beam-column joint structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a column-beam joint structure, and more specifically, a joint between a steel beam and a column made of a reinforced concrete structure in which a square steel pipe or a steel plate is arranged at the beam joint. A column-beam joint structure used for

[Prior Art] Conventionally, Japanese Patent Laid-Open No. 61-225437 discloses a column-beam joint structure which is arranged at a corner portion of a column of a beam joint to connect adjacent beams to reinforce the column. The one described in the publication is known.

[Problems to be solved by the invention] In this technique, since the shape of the reinforcing member is only L-shaped along the corners of the pillar, the degree of burying in the cast concrete is low. However, there is almost no concrete restraining force. Therefore, there is a drawback that the stress transmitted from the beam to the column is difficult to be dispersed at the time of an earthquake or the like, and therefore the column strength at the beam joint is lowered.

Further, in the case of a reinforced concrete column in which a joint formed by a square steel pipe or a steel plate is arranged at the joint with the steel beam, the joint is not provided with the stirrup and only the main reinforcement is erected. In addition to the lack of positional stability of the main bars, there is a drawback that the concrete restraining force is low.

[Object of the Invention] Therefore, the object of the present invention is to have a high concrete constraining force, to ensure the stress transmission from the beam to the column, to increase the column strength at the beam joint, and to fix the column main bar. It is to provide a column-beam joint structure that can be performed.

[Means for Solving the Problem] The inventors of the present invention have made extensive studies in order to achieve the above object, and as a result, the present invention has been achieved.

That is, in the beam-column joint structure according to the present invention, a joint steel material formed of a square steel pipe or a steel plate is arranged at the joint between a reinforced concrete column and a steel beam, and concrete is poured inside the joint steel material. In the structure for carrying out the above-mentioned structure, a reinforcing member having an L-shaped cross section having a protruding plate provided with a through hole for penetrating a column main bar is arranged on the inner wall of the steel member for connecting portion, An end portion of the steel frame beam and the reinforcing member are connected by a bolt in a state of being sandwiched between them.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of a reinforcing member used in a beam-column joint structure of the present invention, and FIG. 2 is a sectional view showing an example of a beam-column joint using the reinforcing member of FIG. is there.

In FIG. 1, reference numeral 1 is a reinforcing member having an L-shape, and a through hole 2 for allowing a column main bar 6 to penetrate is provided at an inner corner portion of the reinforcing member 1, and the tip side is cut into an arc shape. The protruding plate 3 is provided. Reference numeral 4 is a through hole for fastening the bolt.

In FIG. 2, reference numeral 5 denotes a steel member at the joint portion arranged at the joint between the reinforced concrete column and the steel frame beam, which is formed of a square hole tube or a steel plate, and the reinforcing member 1 and the column main bar 6 are provided inside thereof.
Is placed and concrete 10 is placed. Reference numeral 7 denotes a steel frame beam (hereinafter, simply referred to as a beam) joined to the column 5. A member 7A for a joint portion such as a split tee is attached to an end portion of the beam 7 with a bolt and a nut 8.

If the end portion of the beam 7 is formed in advance so that it can be directly bolted to the joint portion steel material 5, the joining member 7A is unnecessary.

The reinforcing member 1 is arranged at an inner corner portion of the steel portion 5 of the joint portion, and when the beam 7 is joined to the steel material 5 of the joint portion, the reinforcing member 1 is simultaneously fastened by a bolt and a nut 9. At this time, by engaging the column main bar 6 with the column main bar engaging portion 2 in advance, it is possible to fix the column main bar 6 without arranging the stirrup, and also to reinforce the beam 7 from the reinforcing member 1. The stress transmitted to the column main muscle 6 can be transmitted and dispersed.

After the beam 7 and the reinforcing member 1 have been fastened to the joint member 5, the concrete 10 is poured into the steel member 5.

The reinforcing member 1 is embedded in the concrete 10 by pouring the concrete 10. At this time, the embedding degree of the L-shaped portion of the reinforcing member 1 is low, but since the projecting plate 3 provided at the inner corner portion is sufficiently embedded in the concrete 10, the concrete restraining force is increased, and the beam 7 to the joint portion are increased. The stress can be reliably transmitted to the steel material 5, and the stress can be dispersed.

Further, the projection plate 3 not only restrains the concrete 10 and contributes to the stress transmission, but also enhances the strength of the reinforcing member 1 itself,
As a result, the strength of the joint steel material 5 at the beam joint can be increased. The shape of the projection plate 3 is preferably formed in an arc shape as shown in FIGS. 1 and 2 from the viewpoints of the stress transmissibility and the strength of the reinforcing member 1 and the steel member 5 at the joint portion.

Although one embodiment of the present invention has been described above, the present invention is not limited to this. For example, the number of column main bars 6 is other than 4 (for example, 8 (see FIG. 3) or 12). (4th
In the case of (see drawing)), the column main bar engaging portions 2 may be formed so as to correspond to the number of the column main bars 6.

Further, the shape of the projecting plate 3 is not limited to the arc shape, and may be linear as shown in FIGS. 3 and 4 or may be provided in a plurality of steps as shown in FIG.

Further, as shown in FIG. 5, the shape of the through hole 4 may be a horizontally long hole 4A or a vertically long hole 4B so as to cope with errors in construction and dimensional accuracy of each member. May be.

The stress transmissibility can be further enhanced by providing a protrusion inside the beam joint portion of the steel portion 5 made of a square steel pipe or a steel plate by cutting and raising or by fixing another member.

[Advantage of Invention] According to the present invention, due to the presence of the projecting plate 3 arranged on the reinforcing member 1, the binding force with the concrete 10 placed in the joint portion is high, and the stress transmission from the beam to the column is ensured. It is possible to provide a column-beam joint structure capable of increasing the column strength at a beam joint portion and fixing the column main bars.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a reinforcing connection member according to the present invention, FIG. 2 is a sectional view showing an example of a beam-column joint using the reinforcing member of FIG. 1, and FIGS. Each of the figures shows another example of the reinforcing connecting member, FIGS. 3 and 4 are plan views, and FIG. 5 is a perspective view. 1: Reinforcement member 2: Column main bar engagement part 3: Projection plate 4: Through hole 5: Connection part steel material 6: Column main bar 7: Beam 7A: Joining member 8: Bolt and nut 9: Bolt and nut 10: Concrete

Claims (1)

[Scope of utility model registration request] 1. A structure in which a steel material for a joint portion formed of a square steel pipe or a steel plate is arranged at a joint portion between a reinforced concrete column and a steel beam, and concrete is placed inside the steel material for the joint portion. On the inner side wall of the mouth steel material, a reinforcing member having an L-shaped cross section having a projection plate in which a through hole for penetrating the column main bar is prepared is arranged, and the joint steel material is sandwiched therebetween. A column-beam joint structure, characterized in that an end portion of the steel beam and the reinforcing member are connected by a bolt.