KR101404513B1 - Steel Reinforced Concrete with Steel Angles or T Bars - Google Patents

Abstract

The present invention relates to a steel reinforced concrete column having improved precision and workability by using a steel section or a T-section steel.
A steel reinforced concrete column using a steel according to the present invention comprises a plurality of steel bars spaced apart from each other and arranged vertically; A transverse reinforcement coupled to surround the outside of the a-shaped beams; And the concrete comprising the a-shaped steel and the transverse reinforcing steel embedded therein, wherein the two legs of the a-shaped steel are arranged so as to face the outside of the column.
In addition, the steel reinforced concrete columns using the T-shaped steel of the present invention include a plurality of T-shaped steel pieces arranged vertically apart from each other; A transverse reinforcement coupled to surround the outside of the T-shaped steel; And the concrete in which the T-shaped steel and the transverse reinforcing steel are embedded, the flange surface of the T-shaped steel is directed to the outside of the column and the web is directed to the inside of the column.
According to the present invention, even when a transverse reinforcing bar having a large diameter is used for arranging the reinforcing bars by disposing the legs of the A-shaped steel or the flange of the T-shaped steel toward the outside of the column, the transverse reinforcing bars such as the bar coils are bent at an obtuse angle, Direction Reinforcement is easy to install and the coil of two points is welded and fixed, so that the coupling of transverse reinforcement is stable. In addition, since the corner portion of the column is chamfered by the reinforcement itself of the column, there is no reduction in the thickness of the coating due to the chamfer, and there is no interference with the corner reinforcement or the steel when the formwork for chamfering is installed.

Description

BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a steel reinforced concrete column using a steel or T-

The present invention relates to a steel reinforced concrete column in which a steel tube or a T-shaped steel is used, and a flange surface of a steel pipe or a T-shaped steel pipe is directed to the outside of the column to improve the workability and precision of the steel pipe assembling column.

As shown in FIGS. 1 (a) and 1 (b), a conventional reinforced concrete column (RC column) is formed by arranging vertical reinforcing bars 11 and lateral reinforcing bars 21, 22 and 23, (10). These RC columns are advantageous in cost compared to other structural members, but they require a lot of manpower and air for steel reinforcement.

In order to overcome the disadvantages of conventional RC columns, the present inventor has developed a PRC column (Pre-fabricated Reinforced Concrete Column) (Patent No. 1050956). The PRC column greatly reduces the work in the field, and it is possible to stand alone by pre-assembling reinforced concrete before concrete pouring, thus drastically shortening construction cost and construction period. However, the PRC column is not easily processed in the panel zone portion where the beams are joined. 2, when the construction of the connection plate 110 is complicated and the diameters of the main ropes 11 are different, the lateral reinforcing bars 21 are disposed on the main ropes 11, .

In order to overcome the shortcomings of the PRC column, the present inventors have developed a pre-fabricated steel reinforced concrete column (PSRC column) using a steel sheet, ) (Patent Application No. 10-2012-78644). However, in recent years, Bar in Coil has been used in which a small bar made of a continuous steel mill or a small and medium continuous rolling mill as a transverse reinforcing bar is coiled in a long length. ˚ It is possible to fold each angle, but it is difficult to fold each coil when using a coil that exceeds D13. Therefore, as shown in FIG. 4, there is a disadvantage that the gap between the transverse reinforcing bars (21, 22) and the A-shaped steel leg faces at the corner of the column causes thinning of the concrete covering. In the case of reinforced concrete column, chamfer is used to prevent corner cracking during use. When a-shaped steel is placed on the corner like PSRC column, there may be a problem in securing concrete coating thickness when chamfering.

In order to solve the above problems, the present invention provides a steel reinforced concrete column (PSRC II) using a steel tube or a T-shaped steel which has high precision and easy installation of transverse reinforcement while saving time and cost by pre- do.

In order to solve the above-mentioned problems, the present invention relates to a steel reinforced concrete column having a circular or polygonal cross section, comprising: a plurality of steel bars spaced apart from each other and arranged vertically; A transverse reinforcing bar which is coupled with the outer sides of the a-shaped steel rods and is combined with the reinforcing bar or the spiral reinforcing bar; One or more vertical reinforcing bars arranged between the adjacent a-shaped steel bars; And a concrete in which the a-shaped steel and the transverse reinforcing steel are embedded; Wherein the two legs of the a-shaped steel are disposed so as to face the outside of the columns, and the transverse reinforcing bars are bent at the two leg ends of the a-shaped steel.

In addition, the present invention relates to a steel reinforced concrete column having a circular or polygonal cross section, comprising: a plurality of T-shaped steel columns arranged vertically apart from each other; A transverse reinforcing bar which is coupled with the outer sides of the T-shaped bars and joined thereto, the reinforcing bar being a band bar or a spiral bar; One or more vertical bars positioned between the adjacent T-shaped bars; And a concrete in which the T-shaped steel and the transverse reinforcement are embedded; Wherein the flange surface of the T-shaped steel is directed to the outside of the column, the web is disposed to face the inside of the column, and the transverse steel is bent at both ends of the T-shaped steel and abutted against the flange outer surface. Provide steel reinforced concrete columns.

In the present invention, the steel reinforced concrete column is a square column having a square cross section, and the a-shaped steel or the T-shaped steel is disposed at four corners of a square column.

In the present invention, each of the A-shaped or T-shaped steel is formed by welding or bolt-joining a plurality of a-shaped or T-shaped steel in the vertical direction.

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The present invention has the following effects.

First, when the transverse reinforcement is bent at an obtuse angle at the joint between the transverse reinforcement and the steel, even if the transverse reinforcement with a large diameter is used by arranging the flange of the A-shaped steel or the flange of the T- Since the transverse reinforcement is fixed by welding at two points, the coupling of the transverse reinforcement is stable.

Second, since the section steel is arranged so as to match the chamfer shape at the corners of the square column, there is no decrease in the thickness of the coating due to the chamfer and there is no interference with the corner reinforcement or the section steel when the formwork is installed.

Third, when a vertical reinforcing bar is wound around a circular reinforcing bar such as a bar coil, a transverse reinforcing bar can maintain a shape close to a circular shape because a steel bar or a T-bar steel supports the bar steel at two points. The confinement area in the transverse reinforcement is increased.

Fourth, since the a section steel or the T section steel has a larger secondary radius than the steel bar, the buckling length becomes longer and the bending stiffness is superior. Therefore, it is advantageous to secure the straightness of the member during manufacturing, and it is more self-supporting than reinforcing steel, so that the stability can be secured in the field transportation and assembling of the pre-assembled material.

Fifth, when the pre-assembled members are assembled by assembling a plurality of assemblies at the factory or the site, it is possible to jointly weld or bolt the a-shaped steel or the T-shaped steel, so that stable and firm connection can be maintained until concrete is poured.

Sixth, in case of the SRC tank using the existing a-shaped steel, the a-shaped steel is exposed to the outside, so it needs to be refracted separately. However, since the a-shaped steel or the T-shaped steel is embedded in the concrete, no separate refractory treatment is required.

Seventh, since SRC group design method can be applied because of using section steel, it is possible to design economically by applying a smaller reduction factor than the RC group design method.

Eighth, it is advantageous in that the precision of the reinforcement is high and the loss ratio of the reinforcing bars is low since the transverse reinforcing bars such as the bar coils are used for pre-assembling.

Ninth, it is possible to solve the problems such as difficulty in securing clear spacing of reinforcing bars due to concentration of corner vertical steel bars in existing RC columns and increase of welding points with transverse steel bars by simplifying the arrangement of reinforcing members by arranging the steel bars at the corners .

1 (a) to 1 (b) are cross-sectional views showing a cross section of a conventional RC column.
2 is a perspective view showing a pre-assembled reinforcing bar of a conventional PRC column.
3 is a perspective view showing a pre-assembled reinforcing bar of a conventional PSRC column.
4 is an enlarged cross-sectional view of a corner portion of a conventional PSRC column.
5 (a) to 5 (c) are perspective views showing a steel reinforced concrete square column using a steel sheet or T-shaped steel sheet according to the present invention.
6 (a) to (b) are perspective views showing a steel reinforced concrete circular column using a steel section or a T-section steel according to the present invention.
7 (a) to (b) are cross-sectional views showing a steel reinforced concrete square column using a steel sheet according to the present invention.
8 (a) to 8 (b) are cross-sectional views showing a steel reinforced concrete square column using the T-shaped steel of the present invention.
9 (a) to 9 (b) are cross-sectional views showing a steel reinforced concrete circular column using the A-shaped or T-shaped steel of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

5 to 9 are views showing various embodiments of a steel reinforced concrete column using the a-shaped steel 12 or the T-shaped steel 13 according to the present invention.

As shown in FIGS. 5 (a) and 5 (b), a steel reinforced concrete column using a steel sheet according to the present invention is a steel reinforced concrete column having a circular or polygonal cross section, A shaped section 12 of the bore; 22 and 23, which are joined together while wrapping the outer sides of the a-shaped beams 12, respectively, as the bar reinforcing bars 21 or the helical reinforcing bars 22 and 23; At least one vertical reinforcing bar (11) laid between the adjacent b-shaped beams (12); And a concrete (10) in which the a-shaped steel (12) and the lateral reinforcing bars (21, 22, 23) are embedded, wherein the two legs of the a-shaped steel (12) are arranged so as to face the outside of the column, The reinforcing bars (21, 22, 23) are characterized by being bent at the two leg ends of the a-shaped steel (12).

The a-shaped steel 12 may be replaced with a T-shaped steel 13 as shown in Fig. 5 (c). The transverse reinforcing bars 21, 22 and 23 are bent at both ends of the T-shaped steel 13 to form a flange outer surface 13, And a contact surface.

Since the two legs of the a-shaped steel pipe 12 or the flange surface of the T-shaped steel pipe 13 are disposed so as to face the outside of the column, the transverse reinforcing bars 21 and 22 are bent at an obtuse angle at the corner of the square pipe, Even if it is easy to deploy. In addition, since the section steel is arranged so as to coincide with the chamfer shape at the corner, it is easy to secure the thickness of the concrete covering even at corner chamfering.

The transverse reinforcement may be a band bar 21 as shown in Fig. 5 (a) or a spiral reinforcing bar 22 as shown in Fig. 5 (b). The transverse reinforcing bars may be joined to the sections 12, 13 or the vertical reinforcing bars 11 by welding, or may be joined by ordinary bonding lines.

Also, the reinforcing bar 21 may be formed by bending a single reinforcing bar into a square, or may be divided into a plurality of pieces.

As shown in FIGS. 5 to 9, the a-shaped steel pipe 12 or the T-shaped steel pipe 13 is disposed at the position of the main RC of the conventional RC column, and the vertical reinforcing bar 11 can be disposed as a secondary reinforcing steel between the adjacent steel pipes have. As shown in Figs. 7 (b) and 8 (b), it is also possible to additionally arrange the A-shaped steel 12 or the T-shaped steel 13 between the adjacent steel bars. It is also possible to use the a-shaped steel 12 and the T-shaped steel 13 in combination.

Particularly, in the case of a quadratic column, the a-shaped steel 12 or the T-shaped steel 13 is disposed at the corner of the column, and the vertical steel bars 11, the steel bars 12 and the T- 13) can be disposed. In the case of the multi-layered single-column, the load is applied to the lower layer, the secondary reinforcement is concentrated in the lower layer, and the secondary reinforcement is less in the upper layer. 7 (a) is a square column in which a steel section 12 is disposed at an edge and a vertical steel bar 11 is arranged between the steel sections 12, and FIG. 7 (b) Only square columns are shown. 8A shows a quadrangular column in which a T-shaped steel 13 is disposed at an edge and a vertical reinforcing bar 11 is arranged between the T-shaped steel 13 and FIG. 8B shows a T- 13) are arranged.

The steel reinforced concrete column of the present invention may have a circular cross section as shown in FIG. 6 or FIG. 9 as well as a rectangular column, and may have a polygonal cross section of five or more angles (not shown). In this case, the transverse reinforcing bar may be made of a band reinforcing bar, but in order to maximize the efficiency of reinforcing bar reinforcement, it is preferable to use the reinforcing bar 23 as shown in Figs. 6 (a) and 6 (b). In the case of pre-assembling with the spiral reinforcing bars 22 and 23 using the coil in the factory, the vertical reinforcing bars 11 and the sections 12 and 13 are first arranged, and then the reinforcing bars and the steel columns are placed in a spiral reinforcing machine And then a part or all of the portions where the spiral reinforcing bars and the vertical reinforcing bars or sections are in contact are welded and joined together. In particular, in the case of a reinforcing bar pre-assembled cylinder, a reinforcing bar such as a mechanical bar coil is wound around the main shaft. In the present invention, since the a-shaped steel 12 or the T-shaped steel 13 stably supports the bar- The joint between the section steel and the transverse reinforcement becomes solid. Further, since the shape of the transverse reinforcement is kept close to the circular shape, the confinement area in the transverse reinforcement of the column concrete is increased. 9 (a) and 9 (b) show a circular column in which a steel section 12 or a T-section steel 13 is arranged and a vertical steel bar 11 is arranged between the steel sections.

In the factory, the columns assembled with steel beams and reinforcing bars are brought into the field, and the concrete columns can be installed by connecting the columns in the vertical direction. And can be welded or bolted in the vertical direction. In the case of welded joints, the upper and lower sections are welded together by abutting welding, and in the case of bolted joints, they can be joined simply by means of bolts and connecting plates. The upper and lower vertical bars 11 can be joined by bonding welding or joining using a coupler. The connection between the top and bottom of the pre-assembly column can be done at the factory but it is also possible to work directly at the site. In this way, it is possible to maintain the stability of the column until the concrete is poured even when the height of the whole column is high like the multi-layered single-pillar, by firmly joining the upper and lower sections.

10: concrete 11: vertical reinforcement
12: Shape 13: T-shaped steel
21: a steel bar 22: a square bar steel
23: Circular spiral reinforcement 110, 210: Connecting plate

Claims (12)

The present invention relates to a steel reinforced concrete column having a circular or polygonal cross section,
A plurality of b-shaped beams (12) arranged vertically spaced apart from each other;
22 and 23, which are joined together while wrapping the outer sides of the a-shaped beams 12, respectively, as the bar reinforcing bars 21 or the helical reinforcing bars 22 and 23;
At least one vertical reinforcing bar (11) laid between the adjacent b-shaped beams (12); And
And a concrete (10) in which the a-shaped steel (12) and the lateral reinforcing bars (21, 22, 23) are embedded,
The two legs of the a-shaped steel pipe 12 are arranged so as to face the outside of the column,
Wherein the transverse reinforcing bars (21, 22, 23) are bent at two leg ends of the a-shaped steel (12).
The method of claim 1,
The steel reinforced concrete column is a rectangular column having a square cross section,
And the a-shaped steel (12) is disposed at four corners of a square pillar.
The method of claim 1,
Wherein each of the beams (12) is formed by welding or bolting a plurality of beams (12) in a vertical direction.
The present invention relates to a steel reinforced concrete column having a circular or polygonal cross section,
A plurality of T-shaped steels (13) arranged vertically spaced apart from each other;
The transverse reinforcing bars 21, 22 and 23, which are joined together while surrounding the outside of the T-shaped steel bars 13, are band bars 21 or helical bars 22 and 23;
At least one vertical reinforcing bar (11) arranged between the adjacent T-shaped bridges (13); And
And a concrete 10 in which the T-shaped steel 13 and the lateral reinforcing bars 21, 22 and 23 are embedded,
The transverse reinforcing bars 21, 22 and 23 are bent at both ends of the T-shaped steel 13, and the flanges of the T- Steel reinforced concrete column using T - section steel.
5. The method of claim 4,
The steel reinforced concrete column is a rectangular column having a square cross section,
Wherein said T-shaped steel (13) is disposed at four corners of a square pillar.
5. The method of claim 4,
Wherein each of the T-shaped steels (13) is formed by welding or bolting a plurality of T-shaped steels (13) in a vertical direction.
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