JPH06158717A - Column joint method - Google Patents

Abstract

PURPOSE:To make unnecessary field welding in an intermediate section of a column by making one spot of a welded joint on a floor necessary for field welding of the column as a spot below an upstair beam welded at a shop, and making the other spot as a spot above a downstair beam welded at the job site. CONSTITUTION:An upstair box-shaped column 1a is mounted on a diaphragm 4 on the top of a downstair box-shaped column 1b, and the box-shaped columns 1b and 1a of the downstair and upstair are temporarily connected with erection pieces 6. After that, the upper surface of the diaphragm 4a and the lowest contact surface of the box-shaped column 1a are welded at the job sit. According to the constitution, the number of welding spots is reduced to decrease cutting work cost and welding work cost, and cost reduction can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column joint construction method for steel-framed columns, which is performed by field welding in the field of construction.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a box-shaped column 1 made of steel.
In the case of the column joint by in-situ welding, it is customary to butt and weld above the steel beam 2 (generally about 1.2 m).

FIG. 7 to FIG. 9 show the details thereof, and the steel box-shaped column is positionally distinguished by the box-shaped column 1b on the lower floor and the box-shaped column 1a on the upper floor. The column material of the floor with the corresponding column joint is vertically divided into an upper divided column 3a and a lower divided column 3b, and in the lower floor, the box-shaped column 1b is a joint position between the upper flange 2a and the lower flange 2b of the steel frame girder 2. Diaphragm 4
a and 4b are arranged, and the diaphragms 4a and 4b are also divided pillars 3c.

The steel frame girder 2 includes a beam bracket 2c which is welded to the divided column 3c of the steel frame column 1.

The diaphragms 4a and 4b and the dividing pillar 3c
The beam bracket 2c and the beam bracket 2c are welded to the upper end of the box-shaped column 1b in advance in the factory and carried into the site as a factory-made work. At that time, the upper-side of the box-shaped column 1a on the upper surface of the diaphragm 4a. The lowermost contact surface of the lower divided pillar 3b is welded and set up.

In this way, the factory-manufactured product is carried in and built on site, and the beam main body 2 is connected to the beam bracket 2c by fastening it with a high-strength bolt with a gusset plate or the like.

The upper end portion of the lower divided column 3b is closed by a blocking plate 5, and the lower divided column 3b and the upper divided column 3a are closed.
Are temporarily fixed by the erection piece 6 and then joined by on-site welding.

[0008]

As described above, the conventional column joint in the steel-framed box-shaped column has three welding points, that is, the upper-column lower beam, the upper-column beam lower, the intermediate column joint, and the welding point. In addition,
The division pillar 3c and the diaphragms 4a and 4b are also welded at the factory, but if these welding points are included, there are five points.

It is an object of the present invention to provide a column joint construction method which can eliminate the disadvantages of the conventional example, reduce the number of welding points, and reduce the cost of cutting and welding the column member.

[0010]

In order to achieve the above object, the present invention mounts a box-shaped pillar of the upper floor on the diaphragm at the top of the box-shaped pillar of the lower floor, and uses an erection piece to form the box-shaped pillar of the lower floor. The gist of the invention is to temporarily fix the column and the box-shaped column on the upper floor, and to weld and join the upper surface of the diaphragm and the lowermost contact surface of the box-shaped column on the upper floor on site.

[0011]

According to the present invention, the welded joint on the floor where the field welding is performed is one place under the factory-welded upper story beam, and the other one is on the lower story beam for field welding. By having two locations, it is possible to eliminate on-site welding in the middle portion of the column.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a side view showing a first embodiment of the column joint construction method of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and the same constituent elements as those of FIGS. 8 to 9 showing the conventional example are the same. Reference numerals are attached.

As in the conventional example, the steel box-shaped column (box column) is positionally distinguished by the lower-column box-shaped column 1b and the upper-layer box-shaped column 1a. The box-shaped pillar 1a of the upper floor is placed on the diaphragm 4a at the top of the pillar 1b, and the box-shaped pillar 1 of the lower floor and the box-shaped pillar 1 of the upper floor are temporarily fixed by the erection piece 6. In this case, the box-shaped pillar 1a on the upper floor is not divided into the upper divided pillar and the lower divided pillar as in the conventional example.

After this, the diaphragm 4 is
The upper surface of a and the lowermost contact surface of the box-shaped column 1a are welded and joined on site.

In the box-shaped column 1b on the lower floor, the diaphragms 4a and 4b are arranged at the joining positions of the upper flange 2a and the lower flange 2b of the steel frame girder 2, and the diaphragms 4a and 4b are also divided columns 3c. Points and these diaphragms 4
The points a, 4b, the divided pillars 3c, and the beam brackets 2c are welded to the upper end of the box-shaped pillar 1b in advance in the factory and carried into the site as a factory-made work, which is the same as the conventional example.

In this embodiment, the erection piece 6 for temporary fixing is formed by projecting it on the lower side surface of the box-shaped column 1a and the upper side surface of the divided column 3c to form the box-shaped column 1b and the box-shaped upper floor. The pillar 1a is directly temporarily fixed.

3 and 4 show a second embodiment of the present invention. The erection piece 6 on the lower floor side is projected on the upper flange 2a of the steel frame girder 2. The box-shaped columns 1b and the upper-level box-shaped columns 1a are temporarily fixed to each other via the beam brackets 2c.

Thus, in the present invention, as shown in FIG. 5, the spot welding spot α of the box-shaped column 1 made of steel is one spot on the girder 2 on the lower floor.

[0019]

As described above, according to the column joint construction method of the present invention, the number of welding points can be reduced to reduce the cost for cutting the column member and the cost for welding, and to realize cost reduction.

[Brief description of drawings]

FIG. 1 is a side view of a main part showing a first embodiment of a column jointing method of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a side view showing a second embodiment of the column joint construction method of the present invention.

FIG. 4 is a sectional view taken along line BB in FIG.

FIG. 5 is an explanatory diagram of the entire building showing the column joint construction method of the present invention.

FIG. 6 is an explanatory diagram of the entire building showing a conventional example.

FIG. 7 is a side view of a main part showing a conventional example.

8 is a sectional view taken along line CC of FIG.

9 is a cross-sectional view taken along line DD of FIG.

[Explanation of symbols]

1 ... Box-shaped pillar 1a ... Box-shaped pillar on the upper floor 1b ... Box-shaped pillar on the lower floor 2 ... Large beam 2a ... Upper flange 2b ... Lower flange 2c ... Beam bracket 3a ... Upper split pillar 3b ... Lower split pillar 3c ... Split pillar 4a, 4b ... diaphragm 5 ... blocking plate 6 ... erection piece

Claims (1)

[Claims] 1. A box pillar of the upper floor is placed on the diaphragm at the top of the box pillar of the lower floor, and the box pillar of the lower floor and the box pillar of the upper floor are temporarily fixed with an erection piece, A column joint construction method characterized in that the upper surface of the diaphragm and the lowermost contact surface of the box-shaped column on the upper floor are welded and joined on site.