KR101512946B1

KR101512946B1 - Pre-fabricated column with round angle and reinforcing bar

Info

Publication number: KR101512946B1
Application number: KR1020140116960A
Authority: KR
Inventors: 강병구; 이한진
Original assignee: 강병구; 이한진
Priority date: 2014-09-03
Filing date: 2014-09-03
Publication date: 2015-04-16
Also published as: WO2016036104A1

Abstract

The present invention relates to a prefabricated column using a round angle and a re-bar. The prefabricated column comprises: four round angles with the rectangular part shaped into an arc to be separately arranged at the corners of a column in a vertical direction; and a plurality of stirrups for covering the outer side of the round angles to be joined to the outer side of the round angles in tiers. According to the present invention, the prefabricated column using a round angle and a re-bar meets the inner bending radius of a standard hook of a stirrup with the use of the round angle of deformed steel instead of existing shape steel in order to secure universality and workability when compared with an existing L-shaped steel.

Description

{Pre-fabricated column with round angle and reinforcing bar}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-assembly column, and more particularly, to a pre-assembly column using a round angle and a rebar.

Although the existing column-related pre-assembling and new-construction methods are being used, new and innovative ones are being proposed. However, since the data are not applicable to the existing methods and are not universal, the parties who are reviewing the construction method Designers) are relying on developer data or evidence without sufficient evidence or data.

For this reason, as the construction progresses, the reviewer or the client will proceed with the construction with anxiety and suspicion. Eventually, management elements of each other increase.

Among these new methods, one of the most popular pre-assembly methods is to develop the main steel material in the pre-assembly column using the welding steel rod. In order to increase the degree of self-assemble during construction, steel material instead of reinforcing steel is inserted into the outer part of the column section Construction methods are being developed and applied.

As disclosed in the Japanese Patent No. 1233693, when a steel bar 20 is applied to an outer frame, angles or angles of outer edges of the angles 10 are generally 90 degrees, Therefore, as shown in FIG. 5 (a), it is difficult to manufacture the column due to the interference S1 and the bending inner radius of the band reinforcing bar 20, which must necessarily be applied according to the architectural design standard [KBC2009] ), The aggregate flows smoothly when the concrete is poured, which causes structural problems.

1 is a cross-sectional view showing a conventional pre-assembly column. 1 and 1233693, a pre-assembly column using angles and angles, which are frequently used recently, has a problem in that when a band reinforcing bar 20 is applied to an outer frame, the angles or the outer frame of the a- And the angles of the bent surfaces are 90 degrees, it is impossible to follow the rule of the inner radius of the standard hooks of stirrups and band bars [KBC2009] among the grounds of design application of the band bars.

If the reinforcing bar of D16 or less is applied as stub and steel bar, the inner radius of bending of the standard hook shall be 2db or 3db (db: nominal diameter of rebar) The steel wire 20 is cut and the long steel wire 30 is welded to the outer portion of the steel steel as shown in Fig. 1, which requires welding a minimum welding amount of 70 mm or more per one place In addition, the increase of the welding amount significantly lowers the productivity, the unit price rises, and the data is insufficient.

Korean Registered Patent No. 1233693 (2013. 02. 08), "Seismic Retrofitting Structure of Pre-assembled Reinforced Concrete Columns and Steel Beams Using Prefabricated Steel" Korean Registered Patent No. 0898283 (2009. 05. 12), "Steel Column for SRC Column Assembled with Reinforced Concrete and Method of Steel Frame Construction Using the Steel Column"

An object of the present invention is to provide a pre-assembly column using a round angle and a reinforcing bar capable of satisfying the inner radius of curvature of a standard bar cage.

In order to achieve the above object, a pre-assembly column using a round angle and a reinforcing bar according to an embodiment of the present invention is an angle formed by arcuate portions bent at 90 degrees and vertically arranged at corner positions of the columns Four round angles; And a plurality of band bars surrounding the outside of the round angles and coupled to the outside of the round angles in a multi-stage manner.

Here, the inner radius of the bent portion of the band reinforcing bar may be 2 to 10 times the nominal diameter of the band reinforcing bar.

In addition, the round angle and the band bar can be joined by spot welding, respectively.

Further, the band bar may be a reinforcing bar for welding.

In addition, the round angle may be a diagonal angle so as to be applicable to a column with a semicircular section.

Further, between the round angles, a pair of auxiliary round angles having an arcuate shape bent at 90 degrees may be further included, and the auxiliary round angles may be wrapped around the auxiliary round angles in multiple stages And a plurality of auxiliary strip reinforcing bars.

In addition, the inner band radius of the bent band portion may be two to ten times the nominal diameter of the band reinforcing bar.

Further, the auxiliary round angle and the auxiliary strip reinforcement may be joined by spot welding, respectively.

Further, the auxiliary strip reinforcement may be a reinforcing steel for welding.

According to the pre-assembled column using the round angle and the reinforcing bar according to the embodiment of the present invention,

First, in order to secure universality and workability that are difficult to meet with conventional a-shaped steel, a round angle, which is a deformed steel rather than a conventional steel sheet, can be applied to satisfy the bending inner radius of the standard steel bar.

Second, to eliminate irregularities caused by the use of existing steels in applying steel of structures by using round angles and welding reinforcing bars to exclude the use of existing a-beams, Parties that apply the evidence more effectively and review the design of the structure can review the structure on a universal basis.

Third, when a curved round angle is used to secure the inner radius of the bent portion of the reinforcing bar, there is no edge, and the steel material adheres closely to the round surface, so that it is easy to secure the proof force. Moreover, The welding amount can be greatly reduced.

Fourth, it is possible to secure the effect of increasing the flexural strength by increasing the center of the round angle compared to the conventional a-shape steel.

Fifth, when the curved surface of the round angle is largely applied, it is easy to chamfer the column that can not be achieved by the conventional a-shaped steel, and it is difficult to secure the coating thickness of the steel and concrete, which is a problem in applying the conventional angle or a- The problem can be compensated.

Sixth, it is possible to form the image of a soft image than when the corner is angled when the concrete is exposed to the outside.

1 is a cross-sectional view showing a conventional pre-assembly column.
2 is a perspective view illustrating a pre-assembly column using a round angle and a reinforcing bar according to an embodiment of the present invention.
3 and 4 are cross-sectional views of the pre-assembly column using the round-angle and reinforcing bars shown in Fig.
5 is a partially enlarged cross-sectional view of a round angle shown in Fig. 3 and Fig.
6 is a front view showing another embodiment of the pre-assembly column using the round angle and the reinforcing bars shown in FIG. 2. FIG.
7 is a cross-sectional view illustrating a pre-assembly column using a round angle and a rebar according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the components in the drawings are exaggerated, omitted, or schematically illustrated.

FIG. 2 is a perspective view showing a pre-assembling column using a round angle and a reinforcing bar according to an embodiment of the present invention, FIG. 3 and FIG. 4 are a transverse sectional view of a pre-assembling column using the round- Fig. 6 is a front view showing another embodiment of the pre-assembly column using the round angle and the reinforcing bars shown in Fig. 2, Fig. 7 is a front view showing the present invention Sectional view of a pre-assembly column using a round angle and a reinforcing bar according to another embodiment of the present invention.

2 to 4, a pre-assembly column CL using a round angle and a reinforcing bar includes four round angles 100 and a plurality of band bars 200.

The rounded angle 100 is an angle formed by an arc of a portion A bent at 90 degrees and is vertically disposed at a corner position of the column.

The plurality of band reinforcing bars 200 surround the outside of the round angles 100 and are coupled to the outside of the round angles 100 in multiple stages. The steel bar 200 may be a welding steel bar, and the steel bar 200 may have an inner radius R of 2 to 10 times the nominal diameter d of the steel bars.

The round angle 100 and the band bar 200 are joined to the spot weld 300, respectively.

FIG. 3 shows a case where the corner of the column CL is angled, and FIG. 4 shows a case where the corner of the column is chamfered (CF). As shown in FIG. 5 (c), a portion bent at 90 degrees can be reduced to have a smaller inner radius R, and a portion bent at 90 degrees as shown in FIG. 5 (d) It is possible to apply a large radius (R) on the inner surface. If the inner radius (R) is increased, the posterior edge of the column can be easily chamfered (CF). Therefore, when the column is exposed to the outside, it can form a smoother image than when the corner is angled.

5 (a), as described above, it is difficult to manufacture the column due to the interference S1 with the inner radius of the bend of the band reinforcing bar 20. Also, due to the empty space S2, the flow of the aggregate is smooth The problem arises structurally.

According to [KBC2009], when applying stirrups and barrels, the inner radius of the bending of the standard hooks should be at least 2 db, and the bending inner radius of all bends other than the standard hooks should be at least 3db.

Conventionally, it is difficult to apply this rule. However, as shown in FIG. 5 (b), the reinforcing bars 20 are cut to form a long line weld 30 on the outer periphery of the section steel. 5, C denotes the center of the inner radius (R), and db denotes the nominal diameter of the steel bar.

The round bar 100 may be joined with the band bar 200 to which the standard hook 2 db is applied, or may be connected to the reinforcing bars to which the other bar 3b is applied.

When the round angle 100 is used, it is possible to apply the outer curvature to a reinforcing bar having an inner radius R of less than 3 by applying a large value of 3db. That is, as shown in FIG. 5 (c), it is also possible to apply a small inner radius R by narrowing the portion bent at 90 degrees. As shown in FIG. 5 (d) The larger the radius (R) is, the more applicable it is.

For reference, the role of a standard claw with an inner radius of 2 db is the fixation of the bar reinforcement (200), and all other reinforcement inner radius, 3db, is related to the continuity aspect of the bar reinforcement (200).

When the round angle 100 is used, there is no edge and the steel material is brought into close contact with the round surface to secure continuity of the steel reinforcing bar 200 to confine the inner concrete and to settle the steel reinforcing bar 200 We can do it wonderfully.

In addition, the round angle 100 may be a uniaxial angle 100 'so as to be applicable to the cross-sectional end column CL' as shown in FIG. That is, when the round angle 100 is produced by bending or molding production using the steel plate, it is possible to maximize the economical efficiency by producing a product of a non-standard size without applying the standardized standard of the existing manufacturable section steel.

That is, when the internal force is concentrated on the strong axis of the section of the column CL 'as in the case of FIG. 7, it is possible to easily apply the section steel of the uniaxial angle 100' to which the minimum steel amount can be applied. Even if the unbalanced angle 100 'is used, since the bending radius of the band bar 200 does not change, the same curvature can be produced.

In the meantime, a pair of auxiliary round angles 400 having an arcuate portion A bent at 90 degrees are further included between the round angles 100, and the outer side of the opposing auxiliary round angles 400 And a plurality of auxiliary strip reinforcing bars 500 coupled to the auxiliary round angles 400 in a multi-stage manner.

The inner radius R of the auxiliary strip reinforcement 500 may be 2 to 10 times the nominal diameter d of the strip reinforcement and the auxiliary round angle 400 and the auxiliary strip reinforcement 500 may be spot welded 0.0 > 600 < / RTI > The auxiliary strip reinforcement 500 may be a reinforcing steel for welding.

In this way, the steel strip 200 and the auxiliary steel bar 500 are effectively applied to the round steel 100 as a main steel, and the sound of each section of the steel column is selected by a conventional bolt joining method or a welding joining method By minimizing the amount of steel material, the method of construction can be maximized by maximizing the advantages of the pre-assembly method by applying the construction system of the steel structure that makes the finished product at the factory with minimum installation in the field.

On the other hand, in the case of penetrating the beam B as shown in FIG. 6, among the methods of joining the beam 100 and the main steel, which is the main steel of the column CL, ) By arranging the plate (700) at the upper and lower parts of the bracket, welding the round shape steel (100) and the beam (B) bracket at the factory secure the same precision as the steel structure. can do.

When the placement of the column main member is completed, the same connection method as that of the conventional RC beam connection method can be applied for connecting the RC beams, and the various types of beams such as the beam (B) B), it is possible to minimize the specificity of the pre-assembly column and to minimize the heterogeneity due to the application of the new method by applying the universality.

For reference, it is difficult to produce various members as shown in the case of applying the conventional steelmaking production method which is a blast furnace production method in producing and applying the round angle 100 as described above. In order to escape the inefficient production method which requires ordering of minimum order quantity of 500 tons due to blast furnace production, high-strength steel plate with sufficient stock is cut to produce products by bending or molding, It is possible to secure diversity of the system.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of the present invention in order to facilitate the understanding of the present invention and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100 ... Round Angle 200 ... Rebar
300 ... Spot welding 400 ... Secondary round angle
500 ... auxiliary strip steel 600 ... point welding

Claims

Four round angles in which the portions bent at 90 degrees are arched angles and are vertically disposed apart from each other at the corner positions of the columns;
A plurality of band bars surrounding the outside of the round angles while being coupled to the outside of the round angles in multiple stages;
A pair of auxiliary round angles provided between the round angles and having an arcuate shape bent at 90 degrees; And
And a plurality of auxiliary strip reinforcing bars joined to the auxiliary round angles at a plurality of stages while enclosing the outside of the facing auxiliary round angles,
Wherein the round angle and the band bar are respectively coupled by spot welding,
Wherein the auxiliary round angle and the auxiliary strip reinforcement are joined by spot welding, respectively.

The method according to claim 1,
The strip reinforcing bars
Wherein the inner radius of the bent portion is 2 to 10 times the nominal diameter of the band reinforcing bar.

delete

The method according to claim 1,
The strip reinforcing bars
Wherein the reinforcing bars are welded reinforcing bars.

The method according to claim 1,
The round-
Wherein the angle is a diagonal angle so that it can be applied to a column with a semicircular section.

delete

The method according to claim 1,
The auxiliary strip reinforcing bars
Wherein the inner radius of the bent portion is 2 to 10 times the nominal diameter of the band reinforcing bar.

delete

The method according to claim 1,
The auxiliary strip reinforcing bars
Wherein the reinforcing bars are welded reinforcing bars.