JPS5817862B2 - Construction method of steel concrete column or steel reinforced concrete column - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for constructing a steel-framed concrete column or a steel-framed reinforced concrete column. The present invention relates to a method of constructing a steel-framed concrete column or a steel-framed reinforced concrete column.

BACKGROUND ART The use of two channel steels facing each other to form a steel frame for concrete structures is widely used because of its excellent cross-sectional performance.

However, the adhesion force between the steel frame and concrete IJ in such structures is small, and it is therefore difficult to integrate the steel frame and concrete through adhesion, so the shear force that is applied to the column or beam member is almost negligible. It must be designed so that the load is borne by a steel frame.

Therefore, the connections between the channel steels are made by complex welding of a large number of thick tie plates or angles in order to sufficiently transmit the shear forces.

Such welding processing requires many steps such as cutting plates and angles, beveling, welding, correcting deformation and distortion by welding, correcting twists and bends, and inspecting, which increases processing costs and lengthens the construction period.

Furthermore, as mentioned above, the steel frame and concrete are not integrated, so a large amount of steel material is required.

The present invention was made to solve the above-mentioned problems, and its purpose is to protect steel frames and concrete IJs from external forces.
An object of the present invention is to provide a method for constructing a steel-framed concrete column or a steel-framed reinforced concrete column having a mechanism for integrally resisting t-.

Another object of the present invention is to easily and quickly connect two pieces of channel steel to form a steel column by bolting simple members prefabricated in a factory to channel steel on site. It is an object of the present invention to provide a method for constructing a steel-framed concrete column or a steel-framed reinforced concrete column, which can be constructed with a small amount of processing cost and steel material.

The method of constructing a steel-framed concrete-coated or steel-framed reinforced concrete column according to the present invention includes forming flanges on the outer periphery and a web on the inner side above and below the joint part of a beam between two channel steels arranged oppositely. At the same time, place angle irons or the like facing each other at appropriate intervals between the channel steels other than the joint part, and attach the bonding material and the angle steel to both channel steels respectively. It is characterized by connecting with bolts to form a steel column, and pouring concrete into the steel column.

The present invention will be explained below using the drawings.

FIG. 1 shows an example of a joint part of a beam of a column in which the present invention is implemented, in which a is a cross-sectional view, b is a cross-sectional view of Ero, and C is a cross-sectional view of Rollo.

1 and 1 are T-shaped steels placed opposite each other so that the webs 1a1a are horizontal; 2.2 is a cut T-shaped steel placed at right angles to the T-shaped steels 1 and 1; 1 web 1
A and 1a are welded to both side surfaces, and these constitute the bonding material 10.

The above-mentioned cut T-beams 2, 2 may be replaced with flat steel, or the joining material 10 may be integrally manufactured from cast steel.

Note that the webs la and ia of the T-beams 1 and 1 function as concrete restraining pieces, which will be described later.

11.11' is a channel steel constituting a half column, the width W1 of the joint material 10 is the distance between the inner sides of the flanges of the channel steels 11 and 1.1', and the width W2 is the same as the gap between both channel steels 1, 1, and 1.1'. 11' is formed to be equal to the designed distance between the webs.

In addition. Each flange of the joining material 10 and the angle irons 11, 11'
The flange and web of are provided with a number of holes for bolting the two together.

FIG. 2 shows an embodiment other than the joint part, in which a is a cross-sectional view and b is a sectional view of the harbor.

The parts other than the joint part are made of angle steel 3.3 with flat bars 4, 4 welded to both ends, and the width thereof is the width W1°W2 of the joining material 10.
The Okayama shape steels 3, 3 are provided with a large number of holes for bolt connection with the channel steels 11, 11'.

In addition, instead of flat steel 4, 4, there is a mountain. A shaped steel may be used, or the flat steel or angle steel that connects the Okayama shaped steel 3, 3 may be omitted.

Next, an embodiment of the pillar construction method according to the present invention will be described with reference to FIG.

In constructing the pillar according to the present invention, first of all, the pillars are facing each other.

A partition part 13 is placed between the two channel steels 11 and 11' arranged.
The two joint materials 10, 10 are sandwiched so that their webs 1a, 1a are located above and below the beam 12, and the channel steels 11, 11'
Bolts are inserted into the holes provided in the bonding material 10 and fixed.

Besides the joint part, angle irons 3, 3 (or a combination of angle iron and flat steel) are sandwiched between the channel steels 11, 11' at a predetermined interval in the vertical direction, and each channel steel 11, 11' are bolted together.

As a result, the double channel steel 11. ．． 11' are joined to form a steel column.

In the embodiment shown in FIG. 3, another angle iron 4', 4' is used as a member for connecting both ends of the angle iron 3, 3 to each other.

Flat bars 4, 4 or angle bars 4/, 47, etc. that connect both ends of the angle irons 3, 3 are used in the joint part 13 when it is necessary to strongly restrain concrete as in the joint part 13. They are provided to perform the same function as the webs ia and la of the joining member 10 provided.

If the sides of the angle irons 4', 4' that are in contact with the webs of the channel steels 11, 11' are connected to the webs with bolts, the structure will be made even more robust.

In the construction method according to the present invention, after forming a steel column as described above, reinforcing is arranged as necessary, and concrete is poured inside or around the steel column to construct a steel concrete column or a steel reinforced concrete column. .

Since the column according to the construction method of the present invention is constructed as described above, the steel frame and concrete are integrated, and when a bending moment from the beam acts on the column, the upper and lower parts of the joint section 13 Tensile stress acts in the direction shown by the arrow, and the joint part 1
Since the concrete in 3 is restrained by the bonding material 10, the concrete is compressed in the diagonal direction shown by the arrow.
Bending moments are handled.

Stress transmission is similarly achieved between the joint portion 10 and the angle irons 3 and between each angle iron 3 by means of a flat bar or the like that connects the ends of the two angle irons 3, 3.

The effects of the construction method according to the present invention are listed below.

(1) Since channel steel requires only machining to make holes for bolts to pass through, it is possible to reduce machining costs and shorten the construction period.

(2) Is the joining material to be joined above and below the joint part, and the angle iron to be joined at a position other than the joint part, simple cutting, welding, and drilling in the factory? It can be manufactured by

In addition, to construct a steel frame column, it is only necessary to connect the channel steel with bolts via a joint material, an angle steel, etc. on site, so the amount of steel material and processing cost are small, and the on-site construction is simple and quick.

Note that costs can be further reduced if the joining material is made of cast steel.

(3) Since the concrete and steel columns are integrated using bonding materials, angle irons, etc., the shear stress and bending stress generated in the beams can be sufficiently transmitted to the steel columns, and the amount of steel can be reduced. can.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figure 1a is a cross-sectional view of an embodiment of the bonding material used in the joint part for carrying out the present invention, b is its vertical cross-sectional view, and C
Figure 2a is a cross-sectional view of two angle irons, b is a vertical cross-sectional view of the harbor of a, and Figure 3a is a cross-sectional view of an example of a column constructed according to the present invention. ,b is a longitudinal sectional view thereof. 1: T-shaped steel, 1a: web, 2: cut T-shaped steel, 3: angle steel, 10: joining material, 11, channel steel to 11, 12: beam,
13: Shiguchi part.

Claims (1)

[Claims] 1 A rectangular joint between two channel steels placed opposite each other, with flanges on the outer periphery at the upper and lower surfaces of the beam material, and webs formed on the inner and outer sides, above and below the joint between the column and the beam. At the same time, angle irons, etc. are arranged facing each other at appropriate intervals between the channel steels other than the joint section, and the joint material and the angle steel are connected to both channel steels with bolts, respectively, to form a steel frame. A method for constructing a steel-framed concrete column or a steel-framed reinforced concrete column, which comprises forming a column and pouring concrete onto the steel-framed column.