JPH07113260A - How to join columns and beams - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a method of joining columns and beams that facilitates the joining of columns and beam steel frames, and that can reduce costs, shorten the construction period, and improve safety. To aim. [Structure] Steel pipe ring 24, joining bracket 2 in advance
5, the joining unit 23 including the hoop muscles 26 is formed, and the joining unit 23 is lowered and positioned from the upper end of the pillar steel frame 21 built in a predetermined position, and the joining unit 23 and the pillar steel frame 21 are fixed. After that, the beam steel frame 22 and the joining unit 23 are joined together with the joint plate 28 and the bolts, and then the column main bar 3 is arranged and concrete 5 is placed, whereby the column 20 and the beam steel frame 22 are joined together. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column-beam joining method suitable for joining a steel-framed reinforced concrete column forming the frame of a building structure, such as a building, to a beam of a steel frame. It is a thing.

[0002]

2. Description of the Related Art Conventionally, when constructing a building structure in which a column is a steel reinforced concrete structure (hereinafter, referred to as "SRC structure") and a beam is, for example, a steel frame structure, the connection structure between the column and the beam beam is as follows. As shown in. As shown in FIG. 3, as is well known, a column 1 having an SRC structure having a rectangular cross-sectional view is provided with a column steel frame 2 along its central axis, and the column steel frame 2 has a column main bar 3 and a hoop bar around the column steel frame 2. 4 is reinforced and concrete 5 is placed. The pillar steel frame 2 has a structure in which cross-sectional I type steel frames are integrated in a crossed state so as to be orthogonal to each other, and flange portions 2a, 2a, ... Are formed on four sides thereof. In addition, pillar steel frame 2
A diaphragm 7 for transmitting a load from the beam steel frame 6 to the column steel frame 2 and enhancing the rigidity of the port portion is formed at the joint portion with the beam steel frames 6, 6, .... The beam steel frames 6 extending in four directions of the column 1 are respectively joined to the flange portions 2a of the column steel frames 2 by butt welding.

The following method is used to join the column 1 and the beam steel frame 6 with the above-described joining structure. In the factory, the diaphragm 7 or the like is attached to the pillar steel frame 2 in advance. Then, at the construction site, after the pillar steel frame 2 is positioned and built in at a predetermined position, the beam steel frame 6 is hung and positioned between the adjacent column steel frames 2 to position the beam steel frame 6 at the flange portion of the column steel frame 2. Butt weld to 2a. After that, after arranging the column main bars 3, hoop bars 4, etc. around the column steel frame 2, a formwork (not shown) is assembled and concrete 5 is placed there to form the SRC column 1. I have to.

Further, as is well known, in addition to the above-described joining method, a joining bracket of a predetermined length having the same cross section as the beam steel frame is provided on the flange portion of the column steel frame in advance at the factory, and the pillar is constructed at the construction site. A method of joining the column and the beam steel frame by welding or joining the steel frame and the beam steel frame with each other by welding or using a joint plate after bolting is also widely used.

[0005]

However, the conventional method of joining columns and beams as described above has the following problems. First, in order to provide the diaphragm 7 and the joining bracket (not shown) on the pillar steel frame 2, needless to say, it takes time to process the pillar steel frame 2, resulting in not only cost but also a long manufacturing period in the factory. It is an obstacle to cost reduction and shortening of construction period. Also,
In particular, when a joining bracket is provided on a pillar steel frame, this joining bracket protrudes to the side surface of the pillar steel frame, which interferes with the transportation and reduces the transportation efficiency on a truck, etc. However, there was a problem that it interfered with other members. Further, when the pillar steel frame 2 is installed, in order to join it with the beam steel frame 6, not only the verticality but also a high installation accuracy is required not only in the rotation direction in the horizontal plane, but this is also troublesome. It is an obstacle to cost reduction and shortening of construction period. Further, after the column steel frame 2 and the beam steel frame 6 are joined, when the column main muscles 3 and the hoop muscles 4 are arranged, the hoop muscles 4 are the web portions 6 of the beam steel frame 6.
Since it is configured to penetrate a, it is necessary to form a hole (not shown) here in advance. In addition, in order to pass the hoop muscle 4 through the hole, the hoop muscle 4 that is rectangular in plan view is used.
Must be divided into two, for example, in a U shape. For this reason, there has been a problem that the work of arranging the joint between the column steel frame 2 and the beam steel frame 6 is very time-consuming and, in addition, the work is performed at a high place, which is dangerous.

In order to solve the above problems, a column-beam joint structure as shown in FIG. 4 has been developed and adopted in recent years. That is, a cylindrical steel ring 9 having an inner diameter larger than the outer diameter dimension of the pillar steel frame 8 around the pillar steel frame 8.
The column steel frame 8 and each beam steel frame 10 are joined by the joining member 11 penetrating the steel ring 9 to join the column 12 and the beam steel frame 10. Joining member 11
Has a flat plate portion 11a having a bolt hole on one end side and a rod-shaped screw portion 11b having a male screw portion on the other end side.
It is shaped like a paddle (a battledore). This joining member 11
Bolts the flat plate portion 11a on one end side to the upper and lower flange portions 10a of the beam steel frame 10, and allows the threaded portion 11b on the other end side to penetrate the steel ring 9 to attach the nut 13 to the flange portion 8a of the pillar steel frame 8. The column steel frame 8 and the beam steel frame 10 are joined to each other by connecting them with each other. However, in the joint structure of the column 12 and the beam steel frame 10 as shown in FIG. 4,
Since the number of constituent parts is large, it is troublesome to join the column steel frame 8, the steel ring 9, and the beam steel frame 10 by the joining member 11. In particular, in order to join the joining member 11 and the flange portion 8a of the pillar steel frame 8, it is necessary to perform the fastening operation of the nut 13 inside the steel pipe ring 9, which is very troublesome. As a result, in the present situation, the method of joining the column 12 and the beam steel frame 10 shown in FIG. 4 has not reached the fundamental solution to the above problem.

The present invention has been made in consideration of the above points, and it is possible to facilitate the connection between the column and the beam steel frame, thereby reducing the cost, shortening the construction period, and improving the safety. It is an object of the present invention to provide a method of joining columns and beams that can be performed.

[0008]

The invention according to claim 1 is
A method of joining a steel-reinforced-reinforced-concrete column and a beam steel frame of a beam constituting a frame of a building structure, in advance, a tubular steel having an inner diameter larger than the outer diameter dimension of the column steel frame of the column. A joining unit is formed on the outer peripheral surface of the steel ring, the joining unit having the same cross-sectional shape as the beam steel frame to be joined and provided so as to face the beam steel frame. After the pillar steel frame is built, the joining unit is lowered from the upper end of the pillar steel frame so that the pillar steel frame is inserted into the steel ring, and the joining unit is to be joined to the beam steel frame. Position, the steel ring of the joining unit is fixed to the pillar steel frame by fixing means, the joining bracket of the joining unit and the beam steel frame are joined by joining means, and then the column rebar of the pillar is arranged. Streak and concrete The joining unit by pouring, said post steel, by integrating the pillar reinforcement is characterized by forming the pillars.

According to a second aspect of the present invention, in the method of joining a pillar and a beam according to the first aspect, a hoop muscle to be arranged in a joint portion between the pillar and the beam is attached to the joining unit in advance. It is characterized by setting.

[0010]

According to the first aspect of the present invention, a column is formed in advance by forming a joining unit in which a joining bracket is provided on the outer peripheral surface of a cylindrical steel ring, and the joining unit is built in a predetermined position. After descending from the upper end of the steel frame, positioning it and fixing it to the column steel frame, the beam steel frame is joined by the joining means, and then the column steel bars are laid out and concrete is placed, whereby the column and beam steel frame I tried to join and. As described above, since the pillar and the beam are joined together by using the integrated joining unit, the joining work is simplified. Moreover,
Since the load from the beam can be transmitted to the column by the joint unit that is integrated with the column by concrete,
It is not necessary to previously attach a joining bracket, a diaphragm, etc. to the pillar steel frame. Furthermore, since the inner diameter of the steel pipe ring of the joining unit is larger than the outer diameter of the pillar steel frame, the joining unit can be moved and rotated for positioning after the pillar steel frame is built.

According to the second aspect of the present invention, since the hoop reinforcement to be arranged in the joint between the column and the beam is attached to the joining unit in advance, the arrangement of the column reinforcement is performed at the construction site. When performing the reinforcement work, it is not necessary to arrange the hoop reinforcement in the joint between the column and the beam, and the construction work of the column can be facilitated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in FIGS. Here, for example, an example of joining a steel beam to an SRC column will be described. FIG. 1 and FIG. 2 show a joint between a column and a beam which are joined by applying the method for joining the column and the beam according to the present invention. In these drawings, reference numeral 20 is a rectangular cross-sectional view and is SR.
A C-shaped column, 21 is a column steel frame having a structure in which cross-sectional I-shaped steel webs are integrated in a crossed state so as to be orthogonal to each other, 2
2 is a cross-section I-shaped beam steel frame, and 23 is the column 20 and the beam steel frame 2
2 is a joining unit provided in the joint portion A with 2.

As shown in FIG. 1, the column 20 and the beam steel frame 22 are joined together at the joint A through the joining unit 23 in the following manner. The joining unit 23 has the same cross-sectional shape as the tubular steel ring 24 having an inner diameter larger than the outer diameter of the pillar steel frame 21 by a certain dimension and the beam steel frame 22 to be joined, and the outer peripheral surface of the steel ring 24. The joining brackets 25 having a constant length are welded and attached to the four sides, and the hoop muscles 26 are integrally welded between the joining brackets 25 adjacent to each other.

In the joint portion A, the joint unit 23 having such a structure is formed in such a manner that the pillar steel frame 21 of the pillar 20 is inserted into the steel ring 24, and is integrally provided on the pillar steel frame 21. It is mounted on (fixing means) 27. The joining unit 23 and the pillar 20 are integrated by the concrete 5. Then, the joint brackets 25 extending in all directions of the joint unit 23 and the beam steel frame 2
2 is joined to the joint plate 28 by a bolt (joining means) not shown. With this configuration, the pillar 20
The beam steel frame 22 and the beam steel frame 22 are joined together via the joining unit 23.

Next, a method for joining the column 20 and the beam steel frame 22 with the above-described joining structure will be described with reference to FIGS.
Will be described with reference to. In advance, in the factory, the joining unit 23 is attached to the four sides of the steel ring 24 with the joining brackets 25.
Are attached by welding, and the hoop muscles 26 are attached by welding. Further, the receiving metal fitting 27 is provided at a predetermined position of the flange portion 21 a of the pillar steel frame 21, that is, the pillar 20.
And the beam steel frame 22 are attached at a position to be joined. The bracket 27 may be attached after the pillar steel frame 21 is built at the construction site.

After the pillar steel frame 21, the beam steel frame 22, the joining unit 23, etc. are carried into the construction site, first,
The pillar steel frame 21 is positioned and built in at a predetermined position. Next, from the upper end of the built-in pillar steel frame 21, the joining unit 2
The joining unit 23 is lowered while inserting the pillar steel frame 21 into the steel ring 24 of No. 3, and placed on the receiving metal fitting 27.
Then, the joining unit 23 is moved and rotated in a horizontal plane so that the axis of each joining bracket 25 is located on the axis of the beam steel frame 22 to be joined and the tip position of each joining bracket 25 is aligned with the beam steel frame 22. After positioning so as to be located at the joining position, the joining unit 23 and the receiving fitting 27 are welded and integrated.

After the joining unit 23 is attached to each pillar steel frame 21 in this manner, the beam steel frames 22 are connected to each other.
It is suspended in between and each beam steel frame 22 and each joining bracket 25 of the joining unit 23 is joined to the joint plate 28 with a bolt (not shown). After this, the main pillars 3, the hoops (not shown), and the like are arranged around the pillar steel frame 21, a formwork (not shown) is assembled, and concrete 5 is placed there to form the pillar 20.
Construct. As a result, the joining unit 23 and the pillar 20 are joined and integrated. At this time, since the hoop muscles 26 are arranged in advance in the joining unit 23 of the joint portion A, it is not necessary to perform the hoop muscle arrangement work for the joint portion A. With the above, the joining of the column 20 and the beam steel frame 22 is completed.

In the method of joining the column 20 and the beam steel frame 22 described above, the joining unit 23 is formed in advance in the factory, and the joining unit 23 is lowered from the upper end of the column steel frame 21 installed at a predetermined position for positioning. After fixing the joint unit 23 and the pillar steel frame 21, the beam steel frame 22 and the joint unit 2 are fixed.
3 are joined with a joint plate 28 and bolts (not shown), after which the column main bars 3 and hoop bars (not shown) are laid out, and concrete 5 is cast to form the pillars 20.
0 and the beam steel frame 22 are joined together. As described above, since the column 20 and the beam steel frame 22 are joined by the joining unit 23 that is integrated in advance, a large number of members can be provided as in the method of joining the column 12 and the beam steel frame 10 shown in FIG. Since it is not necessary to use, the construction can be greatly simplified, the construction cost can be reduced, and the construction period can be shortened. Further, since the load from the beam steel frame 22 can be transmitted to the column 20 via the joining unit 23, it is not necessary to provide the diaphragm 7 on the column steel frame 2 (see FIG. 3) unlike the conventional case, and the column steel frame 21 The labor of processing can be saved, the cost can be reduced, and the construction period can be shortened by shortening the steel frame manufacturing period. Further, when the pillar steel frame 21 is carried into the construction site, since the joining bracket and the like do not project unlike the conventional case, it can be efficiently carried by a truck etc. without hindering the transportation, and the transportation cost can be reduced. It can be reduced. Further, even when the pillar steel frame 21 is built in, the hanging work can be performed without interfering with other members or the like. Moreover, the steel ring 24 of the joining unit 23 has an inner diameter larger than the outer diameter of the pillar steel frame 21 by a certain dimension, and the joining unit 23 is positioned after the pillar steel frame 21 is built. When the 21 is built, not only the verticality but also the tolerance of the positional accuracy in the rotation direction in the horizontal plane can be made larger than the conventional one, which greatly facilitates the work of building the pillar steel frame 21, From this point as well, the construction cost can be reduced and the construction period can be shortened. In particular, when the above-mentioned joining method is applied to a so-called underground structure true pillar construction method in which the built-in pillar steel frame 21 is used as a temporary pillar after the built-in pillar steel frame 21 is used as a temporary pillar during the construction of the underground structure, The above-mentioned effect by facilitating the assembling work can be further enhanced. Further, in advance, in the joining unit 23,
Since the hoop muscle 26 of the connection part A is provided,
It is not necessary to perform the hoop reinforcement work to the joint portion A when the reinforcement work is performed. As a result, it is possible to reduce the work of reinforcing bars at the construction site and to reduce the number of workers of the reinforcing bar work, and since work at high places is also eliminated, it is possible to improve work safety.

In the above-described embodiment, the joint plate 28 and the bolt (not shown) are used as the joining means for joining the joining unit 23 and the beam steel frame 22, but they are joined by butt welding. Needless to say, the joint plate 28 and the joining by the bolt (not shown) and the butt welding may be used together. Further, as described above, in order to support the joining bracket 25, the receiving metal fitting 27 provided on the pillar steel frame 21 may be installed in the factory in advance, or may be installed after the pillar steel frame 21 is built at the construction site. Also, the shape is not limited. Further, in the above-described embodiment, the hoop reinforcement 26 is provided in the joining unit 23 in advance, but a hoop band made of steel plate may be provided in place of the hoop reinforcement 26. Furthermore, SR
If the column 20 made of C and the beam using the beam steel frame 22 are joined, even if the beam is, for example, SRC, the same effect can be obtained by using the same configuration as above. Of course, the number and arrangement of the beam steel frames 22 joined to the columns 20 are not limited to those in the above embodiment.

[0020]

As described above, according to the method of joining columns and beams according to the first aspect of the present invention, a joining unit including a steel ring and a joining bracket is formed in advance, and the pillar is built in a predetermined position. This joint unit is lowered from the upper end of the steel frame and positioned, and after fixing the joint unit and the column steel frame, the beam steel frame and the joint unit are joined by the joining means. By arranging them, the columns and beams are joined together. In this way, since the pillar and the beam are joined by the joining unit which is integrated in advance, it is not necessary to use a large number of members as in the conventional case, the construction is greatly simplified, and the construction cost is reduced. ， The work period can be shortened. In addition, since the load from the beam can be transmitted to the column via the joining unit, it is not necessary to install a diaphragm, and the labor of machining the column steel frame can be saved, resulting in cost reduction and shortened steel frame production time. The work period can be shortened. In addition, when carrying the pillar steel frame to the construction site, since the joining bracket etc. do not project as in the past, it does not interfere with the transportation and can be efficiently transported by a truck etc., so the transportation cost is reduced. It can be reduced. Further, when the pillar steel frame is built, the hanging work can be performed without interfering with other members. Moreover, since the steel ring of the joining unit has an inner diameter that is a certain size larger than the outer diameter of the column steel frame, the joining unit is positioned after the column steel frame is installed. Not only the verticality at the time of installation, but also the tolerance of the positional accuracy in the rotation direction in the horizontal plane can be made larger than before, which greatly facilitates the work of installing the column steel frame. It is possible to reduce the construction cost and the construction period. In particular, if the above joining method is applied to the so-called underground structure true pillar construction method in which the built-in pillar steel frame is used as a temporary pillar after the built-in pillar steel frame is used as a temporary pillar during the construction of the underground structure, The above-mentioned effect due to the facilitation of the work can be further increased.

According to the method of joining columns and beams according to the second aspect, since the hoop reinforcement to be laid in the joint portion is provided in the joining unit in advance, when the reinforcement work is performed, the hoop reinforcement is There is no need to perform work to arrange the hoop muscles of the mouth. As a result, it is possible to reduce the work of reinforcing bars at the construction site, reduce the number of workers for the reinforcing bar work, and eliminate the work at high places.
Work safety can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a connection portion between a pillar and a beam to which a method for joining a pillar and a beam according to the present invention is applied.

FIG. 2 is a plan sectional view of the joint section.

FIG. 3 is a plan sectional view showing an example of a conventional method of joining a column and a beam.

FIG. 4 is a plan sectional view showing another example of a conventional method of joining a column and a beam.

[Explanation of symbols]

 20 column 21 column steel frame 22 beam steel frame 23 joining unit 24 steel ring 25 joining bracket 26 hoop muscle 27 receiving metal fitting (fixing means) 28 joint plate (joining means) A joint part

Claims (2)

[Claims] 1. A method of joining a column of a steel reinforced concrete structure and a beam steel frame of a beam, which constitute the frame of a building structure, wherein the column has a larger inner diameter than the outer diameter dimension of the column steel frame of the column in advance. A joining unit including a tubular steel ring and a joining bracket having the same cross-sectional shape as the beam steel frame to be joined and provided on the outer peripheral surface of the steel ring so as to face the beam steel frame is formed. Then, after the pillar steel frame is built, the joining unit is lowered from the upper end of the pillar steel frame so that the pillar steel frame is inserted into the steel ring, and the joining unit is attached to the beam steel frame. The steel ring of the joining unit is fixed to the pillar steel frame by a fixing means, the joining bracket of the joining unit and the beam steel frame are joined by joining means, and then the pillar is joined. The pillar reinforcement of The joining unit, said post steel bonding method columns and beams, characterized by forming said integral the pillar reinforcement pillars by pouring concrete. 2. The method of joining a column and a beam according to claim 1, wherein a hoop muscle to be laid in a joint between the column and the beam is attached to the joining unit in advance. How to join columns and beams.