KR101487139B1 - Pre-fabricated column with reinforcing bar - Google Patents

Abstract

The present invention relates to a preassembled reinforcing bar column which includes four main bars vertically arranged at a corner of a column while being apart from each other; a plurality of auxiliary bars vertically arranged among the four main bars; a plurality of tie hoops coupled to outer portions of the main bars in multiple stages while surrounding the outer portions of the main bars; main brackets having L-shaped steel pieces arranged to form a quadrangle at a height in which a beam is installed to have one surface mounted on an upper surface or a lower surface of the beam, and having each of the corners respectively welded and coupled inside the four main bars; coupling brackets arranged on upper ends and lower ends of the main bars to enable the L-shaped steel pieces to form a quadrangle, and having each of the corners respectively welded and coupled inside the four main bars; and a first fastening bolt and a first fastening nut vertically fastening the coupling brackets facing each other. According to the present invention, the main bars of a column are formed by welding the main brackets with the coupling brackets to secure construction independence; a system capable of preconstructing the beam is prepared to minimize use of field workers; and a construction period is shortened and management elements are reduced due to a remarkably reduced field process.

Description

{Pre-fabricated column with reinforcing bar}

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

Construction work frame construction can be broadly divided into reinforced concrete structure, steel structure, and steel reinforced concrete structure.

The most commonly applied reinforced concrete structure is concrete construction using only concrete and reinforcing steel, and casting is also installed directly on the site to cast concrete, which is the cheapest construction cost compared to the other two construction methods. However, almost all the work and the cost are generated in the field, and the construction period is longest among the above three methods and is influenced by the weather. In addition, there is a high reliance on field personnel, and labor costs for steel workers and carpenters have recently risen, making labor supply difficult.

In case of steel structure, it is advantageous to reduce the construction period because the effect of weather can be minimized by factory production of steel members and on-site dry method. However, it requires more amount of steel than other methods, This is a high technique.

The steel reinforced concrete structure is a fusion of steel structure and steel concrete structure. It is a method to make the structure most robust by supplementing the structural weakness that can not be solved by steel frame with reinforcing steel and concrete. However, due to the use of steel frame, there is a factor of rising construction cost, and there is still a disadvantage that concrete is installed in the field.

Therefore, there is a growing demand for a method that can combine the merits of the above-mentioned methods and combine heterogeneous parts of the respective processes and effectively apply them to the site.

Currently, the construction market is in a situation where there are many negative factors such as serious labor shortage and instability of raw material prices. In the most serious problem, the most serious problem is the labor shortage, and there is a situation in which advanced technicians continuously decrease and the labor force can not be supplied on time.

For this reason, the landscape of the architectural market is gradually transformed into the construction methods that can simplify the construction method and minimize the manpower input on the site, that is, to construct the structure or product at the factory and to construct it simply and quickly. There are many pre-assembled products and construction methods that produce columns and beams from factories among the various types of construction methods that have been created for the above reasons. There are many ways to improve such as the lack of price competitiveness due to entering the market or the use of unnecessary steel materials Is also emerging.

This is why the need for prefabrication of main structural parts, which combines the factory construction method, which is a merit of steel structure, and the reliance on field work, which is the biggest disadvantage of reinforced concrete construction, is more emphasized. The pre-assembly method can satisfy both the economical efficiency of the reinforced concrete column and the construction of the steel structure.

However, it is difficult to obtain a vertical degree due to the characteristics of reinforcing bars even if the construction of the reinforcing bar assembly column is calculated by calculating the degree of self-sufficiency of the construction, and excessive load is applied to the slab or bow Often occurs.

FIG. 1 is a perspective view showing a conventional pillar joint. As shown in FIG. 1, when the column main shaft is joined to the site, the rebar loss occurs. Therefore, there is a need for a method that minimizes the loss of reinforcing bars caused by site joints and optimizes the application of brackets connecting columns and beams, thereby lowering construction costs and securing economical efficiency.

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 reinforcing steel pre-assembly column capable of improving the efficiency of factory production and the workability in the field.

In order to accomplish the above object, according to an embodiment of the present invention, a reinforcing bar pre-assembly column includes four main bars spaced apart from each other at a corner position of a column, A plurality of auxiliary rods vertically disposed between the four main rods; A plurality of band reinforcing bars surrounding outer sides of the main reinforcing bars and joined to the outer sides of the main reinforcing bars in multiple stages; A main bracket disposed at a height at which the beam is installed so that one side thereof is seated on an upper surface or a lower surface of the beam, and each corner is welded to the inside of the four main ropes; An engaging bracket disposed at an upper end and a lower end of the main pipe so as to form a quadrangular shape and each corner welded to the inside of the four main pipes; And a first fastening bolt and a first fastening nut for fastening the coupling brackets facing each other in the vertical direction.

Here, the main rods, the auxiliary rods, and the band bars may be reinforcing bars for welding, respectively.

The coupling bracket may include a plurality of reinforcing plates for reinforcing the coupling brackets from the outside; And a second fastening bolt and a second fastening nut for fastening the reinforcing plates and the coupling brackets in a horizontal direction.

In addition, the reinforcing plate may be disposed in a space between the main muscle and the auxiliary muscle, respectively.

Further, when the cross section of the column decreases from the upper side, four auxiliary main rods arranged vertically apart from each other inside the main rope; And a sub bracket disposed on the inside of the main bracket so as to form a quadrangular shape and each corner welded to the inside of the four auxiliary main ropes.

Further, in the case of a reinforcing bar pre-assembly column disposed on a foundation, the joining brackets disposed at the lower end are arranged such that the cross-sections of the joining brackets are square so that the lower face is seated on the upper surface of the foundation, and the first fastening bolt may be an anchor bolt .

In order to prevent buckling, the reinforcing bracing reinforcement may further include a reinforcing bracing reinforcing bar which is joined to the end of the main bracing in an X-shape at an inner side of the two adjacent bracing rods, wherein the reinforcing bracing reinforcing bar is a welding reinforcing bar.

According to the reinforcement pre-assembly column according to the embodiment of the present invention,

First, it has a system that can secure the self-sufficiency of construction and welding the main beam of the column to the main bracket and the joint bracket, minimizing the use of field personnel and reducing the process in the field. Effect can be expected.

Second, the column, which is the main structure of the building structure, can be manufactured at the plant, which is the same manufacturing method as the steel structure, using the welding steel, and the finished steel column can be installed at the site.

Third, the main bracket connecting column and beam ensures accuracy and seismic resistance, and arrangement of reinforcing bars is arranged to the corner of column as much as possible, which facilitates penetration of main bracket, thus enhancing plant construction and field construction.

Fourth, it is possible to reduce the amount of steel of unnecessary lap joints by replacing the conventional field lap joint portion with the engagement bracket.

Fifth, a steel structure type first fastening bolt and a first fastening nut are applied to achieve both workability and economical efficiency.

Sixth, due to the application of the coupling bracket, the possibility that the yield of the bolt is less than that of the bolt joint can be reinforced by disposing the first fastening bolt and the first fastening nut on the inside of the fastening bracket.

Seventh, the reinforcing plate, the second fastening bolt and the second fastening nut can be used to reinforce the amount of steel of the fastening bracket.

Eighth, even if the section of the column decreases from the upper side, it is possible to continuously construct the reinforcing bars using the auxiliary main beam and the auxiliary bracket.

Ninth, even if the pre-assembly column and base are brought into contact, the bottom main bracket and base can be fastened with anchor bolts.

In the tenth, when the construction load is concentrated during the construction process, it is possible to arrange reinforcing bracing reinforcing bars inside the reinforcing bars so as to prevent a situation in which the reinforcing bars are yielded.

FIG. 1 is a perspective view showing a conventional pillar joint.
2 is a front view showing a reinforcing bar pre-assembly column according to an embodiment of the present invention.
3 is a perspective view of the periphery of the main bracket shown in Fig.
4 is a cross-sectional view of AA shown in Fig.
5 is an assembled perspective view of the coupling bracket shown in FIG.
6 is a cross-sectional view of the coupling bracket shown in Fig.
7 is an exploded perspective view of the coupling bracket shown in Fig.
8 is a front view showing a reinforcing bar pre-assembly column according to another embodiment of the present invention.
FIG. 9 is a perspective view of the periphery of the auxiliary bracket shown in FIG. 8; FIG.
10 is a front view showing a case where the reinforcing rod pre-assembly column and the foundation are brought into contact with each other.
11 is a perspective view illustrating a reinforcement pre-assembly column 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.

3 is a perspective view of the periphery of the main bracket shown in Fig. 2, Fig. 4 is a sectional view of AA shown in Fig. 2, Fig. 5 is a sectional view of the reinforcing bar pre- Fig. 6 is a cross-sectional view of the coupling bracket shown in Fig. 5, and Fig. 7 is an exploded perspective view of the coupling bracket shown in Fig.

1 to 7, a reinforcing bar pre-assembly column PC includes four main ropes 100, a plurality of auxiliary ropes 200, a plurality of reinforcing rods 300, a main bracket 400, And includes a coupling bracket 500, a first fastening bolt 610, and a first fastening nut 620.

The four main rods 100 are vertically disposed apart from each other at the corner positions of the columns. A plurality of auxiliary muscles (200) are arranged vertically between the four main rods (100).

The main and auxiliary muscles 100 and 200 and the main bracket 400 to be described later are concentrated on the corners of the reinforcing bar pre-assembly column PC as shown in FIG. It is possible to minimize the interference caused by the joining, to maximize the tensile force of the column, and to secure the structural stability.

The plurality of band reinforcing bars 300 are coupled to the outside of the main ropes 100 in a multi-stage manner while surrounding the outside of the main ropes 100.

Here, the main rope 100, the auxiliary rope 200, and the bar reinforcing bars 300 use welding reinforcing bars, respectively. That is, the main rope 100, the auxiliary rope 200 and the reinforcing rods 300 are welded by using a large-diameter welding reinforcing bar (SD500W, SD400W, etc.), while avoiding the use of conventional reinforcing bars.

Welding reinforcing bars have a high carbon content and are specially produced to facilitate welding at processing plants. The carbon content of ordinary reinforcing bars is 0.2 ~ 0.3%, the strength of H-beams is 0.2%, and that of welding reinforcing bars is 0.4% or more. In the case of ordinary reinforcing bars, there is an undercut phenomenon in which the strength is weakened when welding is performed.

As shown in FIG. 3, the main bracket 400 is arranged such that a section of the main beam 400 is rectangular at a height at which the beam B is installed so that one surface thereof is seated on the upper surface or the lower surface of the beam B, 100). The main bracket 400 connecting the reinforcing bar assembly PC and the beam B is arranged so as to maximize the arrangement of the reinforcing bars at the corners of the column to facilitate the penetration of the main bracket 400, The workability of the site can be increased.

As shown in FIGS. 5 to 7, the coupling bracket 500 is arranged at the upper and lower ends of the main shaft 100 such that the A-shaped steel bars form a quadrilateral, and each corner is welded to the inside of the four main bars.

At this time, the coupling bracket 500 includes a plurality of reinforcing plates 510, a second fastening bolt 520, and a second fastening nut 530.

The plurality of reinforcing plates 510 reinforce the engaging brackets 500 from the outside and the second engaging bolts 520 and the second engaging nuts 530 reinforce the reinforcing plates 510 and the engaging brackets 500 Tighten in the horizontal direction. The coupling bracket 500 is formed with a coupling hole 500b in the horizontal direction and the coupling hole 510a is formed in the reinforcing plate 510 to penetrate the second coupling bolt 520.

The reinforcing plate 510 is disposed in the space between the main muscle 100 and the auxiliary muscle 200, respectively. The reinforcing plate 510, the second fastening bolt 520, and the second fastening nut 530 can be used to reinforce the amount of steel in the fastening bracket.

The first fastening bolts 610 and the first fastening nuts 620 fasten the upper and lower coupling brackets 500 in the vertical direction. The coupling bracket 500 is formed with a coupling hole 500a in the vertical direction so that the first coupling bolt 610 passes through it. The possibility that the quantity of the bolts is less than the bolt joining standard due to the application of the coupling bracket 500 can be reinforced by disposing the first fastening bolt 610 and the first fastening nut 620 on the inner side of the coupling bracket 500.

FIG. 8 is a front view showing a reinforcement pre-assembly column according to another embodiment of the present invention, and FIG. 9 is a perspective view of the vicinity of the auxiliary bracket shown in FIG.

As shown in FIGS. 8 and 9, when the cross section of the column decreases from the upper side, it further includes four auxiliary main rods 110 and a sub bracket 410.

The auxiliary main rods 110 are vertically disposed to be spaced apart from each other on the inside of the main rope 100. The auxiliary main rods 110 can be welded to the auxiliary roots 200 at the bottom. The auxiliary brackets 410 are arranged inside the main bracket 400 such that the A-shaped steel bars form a quadrangle, and each corner welds to the inside of the four auxiliary main ropes 110. The auxiliary bracket 410 is seated inside the main bracket 400. That is, even if the cross section of the column decreases from the upper side, it is possible to continuously construct the reinforcing bar pre-assembly column PC by using the auxiliary main beam 110 and the auxiliary bracket 410.

10 is a front view showing a case where the reinforcing rod pre-assembly column and the foundation are brought into contact with each other.

10, in the case of the reinforcing bar pre-assembly column PC disposed on the foundation F, the joining brackets 500 disposed at the lower end are formed so that the b-shaped steel rods are rectangular in shape so that the lower surface is seated on the upper surface of the foundation F And the first fastening bolt 610 is replaced with an anchor bolt A.

11 is a perspective view illustrating a reinforcement pre-assembly column according to another embodiment of the present invention. As shown in Fig. 11, reinforcing bracing reinforcing bars 700 may be provided to prevent buckling, in which reinforcing bracing reinforcing bars 700 are joined in an X-shape inside the two adjacent main ropes 100 with the main rope 100 and the ends thereof. At this time, the reinforcing bracing reinforcement 700 is a reinforcing bar for welding. That is, when the construction load is concentrated during the construction process, the reinforcement bracing reinforcement 700 is disposed inside the main reinforcement 100 to prevent the rebar breakage of the column main reinforcement 100 from occurring.

Thus, according to the present invention, there is a system in which the main rope 100 of the column is welded to the main bracket 400 and the coupling bracket 500 to secure the self-standing degree of the construction and to wind the beam B, And since the process in the field is sharply reduced, the construction period can be shortened and the management factor can be reduced.

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 ... Main muscle 200 ... Auxiliary muscle
300 ... band steel 400 ... main bracket
500 ... engagement bracket 610 ... first fastening bolt
620 ... second fastening nut 700 ... reinforced bracing reinforcement

Claims (7)

Four main rods vertically spaced apart from each other at corner positions of the column;
A plurality of auxiliary rods vertically disposed between the four main rods;
A plurality of band reinforcing bars surrounding outer sides of the main reinforcing bars and joined to the outer sides of the main reinforcing bars in multiple stages;
A main bracket disposed at a height at which the beam is installed so that one side thereof is seated on an upper surface or a lower surface of the beam, and each corner is welded to the inside of the four main ropes;
An engaging bracket disposed at an upper end and a lower end of the main pipe so as to form a quadrangular shape and each corner welded to the inside of the four main pipes; And
A first fastening bolt for fastening the coupling brackets facing each other in the vertical direction; and a first fastening nut. The method according to claim 1,
Wherein the main rods, the auxiliary rods,
Wherein each of the reinforcing bars is a welding reinforcing bar. The method according to claim 1,
The coupling bracket
A plurality of reinforcing plates for reinforcing the engaging brackets from outside; And
Further comprising a second fastening bolt and a second fastening nut for fastening the reinforcing plates and the fastening brackets in a horizontal direction. The method of claim 3,
Wherein the reinforcing plate
Wherein the reinforcing bar is disposed in a space between the main and auxiliary muscles. The method according to claim 1,
When the cross section of the column decreases from the upper side,
Four auxiliary main rods disposed vertically apart from each other inside the main rope; And
Further comprising a sub bracket disposed on the inside of the main bracket so as to form a quadrilateral shape and each corner welded to the inside of the four auxiliary main rods. The method according to claim 1,
In the case of a reinforcing bar assembly column placed on a foundation,
And the engagement bracket disposed at the lower end,
Wherein the first and second fastening bolts are arranged so as to form a quadrangular shape so as to be seated on the upper surface of the base, and the first fastening bolt is an anchor bolt. The method according to claim 1,
Further comprising a reinforcing bracing reinforcing bar which is joined to the end of the main bracing in an X-shape within two adjoining main ropes to prevent buckling, wherein the reinforcing bracing reinforcing bars are welding reinforcing bars.

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