KR20020060429A - Joint of reinforced concrete column and steel beam and a method of the same - Google Patents

Abstract

PURPOSE: A joint structure is provided to simplify the site processes and reduce cost and members for manufacturing joint structure of reinforced concrete column and steel girder. CONSTITUTION: The joint structure comprises a reinforced concrete column vertically buried plural vertical main bars inside the column to reinforce tension of column, steel girder penetrating the reinforced concrete column, and plural shear reinforcements connecting respective plural main bars separated to plural main bar groups by the steel girder with reinforcing plates between upper and lower flanges and web, so it is characterized by no joint between the shear reinforcements and the steel girder with outside reinforcing plates on upper and lower outside flanges.

Description

JOINT OF REINFORCED CONCRETE COLUMN AND STEEL BEAM AND A METHOD OF THE SAME}

The present invention relates to a joint structure of a reinforced concrete column and a steel beam and a method of manufacturing the same. More specifically, the pillar of a building uses two reinforced concrete, and the two structural members of the structural structure using a steel frame is more robust to two members of different materials. The present invention relates to a joint structure of a reinforced concrete column and a steel beam that can be easily and easily joined, and a method of manufacturing the same.

In the conventional building structure, a single structure using the same materials as columns and beams, such as reinforced concrete structure, steel structure or steel reinforced concrete structure, is commonly used. It was organized. Double-reinforced concrete structure, which is strong in compressive force but very weak in tensile force, reinforces strong reinforcing bars in concrete to complement each other, and is used most structurally or economically. Such reinforced concrete structure has many advantages. Nevertheless, it is not suitable for long span buildings or high-rise buildings due to its large cross section and heavy weight, and it is weak to warpage. There is a disadvantage that is required.

In addition, the steel frame structure is made of steel materials with higher strength and ductility than reinforced concrete, and thus can absorb a lot of deformation energy due to earthquake, wind, impact, etc., which is advantageous for high-rise or high-rise buildings or long span buildings. On the other hand, the member is easy to buckling against the compressive force, the strength is weakened by deformation or deformation due to high temperature at the time of welding connection, it is easy to rust by moisture. However, in recent years, since it has been enlarged in size and ultra-high in size, and complex and diversified in function, the above-described single structure is unsuitable for building requirements due to the characteristics of the material, and in terms of construction conditions and economics. Adverse cases have occurred.

For this reason, researches are being actively conducted on new composite structures which take advantage of each structural system and combine them with each other in order to improve structural performance and shorten air and save labor costs.

In this composite structure, the pillar member is used as reinforced concrete because of its high compressive force and high lateral stiffness, and the steel frame is advantageous in the height and weight reduction of buildings due to the less dancing of the member than the reinforced concrete member in the long span structure. do.

In the composite structure using reinforced concrete columns and steel beams, the design of the joint structure where the reinforced concrete columns and steel beams meet is very important. Reinforced concrete and steel frame are materials with different material properties, and the part where the two members are joined is an important part for transmitting stress acting on the structure and is an important part that affects the safety of the entire structural system. Therefore, many studies have been proposed for the joint structure of reinforced concrete columns and steel beams.

1 is a perspective view showing a junction structure of a conventional reinforced concrete column and a steel beam, install a steel beam of the + type to the reinforced concrete column, and reinforce the main bar of the column on the four corners of the reinforced concrete column, transverse reinforcement (hereinafter referred to as Shear reinforcing bar) was used to drill holes in the web of steel beams and restrain the main bar of the column. This method requires the precise positioning of the hole in the web of the steel beam, drilling the hole, and then inserting the shear reinforcing bar of the column into the hole, which is difficult and complicated to perform at the construction site.

Another method of the perspective view shown in Figure 1 is to install a steel beam of the + type on the reinforced concrete column, and to install the plate on the upper and lower flanges and the web of the steel beam at the same position as the outer surface of the column, We welded the shear reinforcing bar to horizontally wrap the main bar. In this method, the shear bar of the column must be welded at the work site every time to restrain the vertical main bar, which causes troublesome work of welding the shear bar to the web.

The present invention has been made to solve the above problems, and an object thereof is to provide a more robust joint structure for joining two different materials, such as reinforced concrete columns and steel beams.

The present invention effectively improves the reinforcement method of shear reinforcing bars that act as a buckling prevention of reinforced concrete pillars in the joint structure of reinforced concrete columns and steel beams, restraint and shear reinforcement of the concrete inside the bonded structure, reinforced concrete columns and steel beams It is to provide a method for securing the structural strength required in the joint structure of.

In order to achieve the above object, the joint structure of the reinforced concrete column and the steel beam includes a reinforced concrete column embedded with a plurality of main bars vertically inside the column to reinforce the column; Steel beams penetrating reinforced concrete columns; And a plurality of shear reinforcing bars separated by a steel beam and interconnecting only a plurality of main steel bars separated by the group, so that the shear reinforcing bars are not in contact with the steel beams. As a method of manufacturing a bonded structure of a reinforced concrete column and a steel beam to achieve the above object, a reinforced structure is manufactured by embedding a plurality of main bars vertically inside the column to reinforce the tensile strength of the column. Doing; Penetrating a steel beam to the reinforced concrete column; Separating and restraining a plurality of shear bars which are separated by a steel beam group into a plurality of main root groups and interconnecting only a plurality of main roots separated into a group; And placing concrete and curing the reinforced concrete columns and the steel beams, thereby providing a joint structure of the reinforced concrete columns and the steel beams, wherein the shear reinforcing bars are not in contact with the steel beams.

1 is a perspective view showing a joint structure of a conventional reinforced concrete column and steel beams.

Figure 2 is a perspective view showing a bonded structure of the reinforced concrete column and steel beam according to the present invention.

Figure 3 is a plan view showing a bonded structure of the reinforced concrete column and steel frame beam according to the present invention.

Figure 4 is a cross-sectional view showing a joint structure of the reinforced concrete column and the steel beam according to the present invention.

Explanation of symbols on the main parts of the drawings

1: reinforced concrete column

2: steel beam

3: reinforcement plate

4: External reinforcement plate

5: vertical reinforcement of reinforced concrete columns

6: shear rebar

The present invention will be more clearly understood from the following description, in comparison with the prior art, with reference to the accompanying drawings.

Figure 2 is a perspective view showing a joint structure of the reinforced concrete column and steel beam according to the present invention, Figures 3 and 4 are a plan view and a cross-sectional view of the joint structure of the reinforced concrete column (1) and steel frame beam (2). Referring to Figure 2, the joint structure of the present invention reinforced concrete pillars and steel beams are reinforced concrete columns (1), steel beams (2), reinforcement plate (3), external reinforcement plate (4), reinforced concrete column It consists of a main bar (5) and a shear bar (6).

Reinforced concrete column (1) concrete is strong in compressive force but weak in tensile force is used to reinforce the tensile force to reinforce the concrete and the reinforcement to the external force. Reinforced concrete column (1) is the same as the reinforced concrete column used in the general construction site, it is possible to cast in the field or use a precast pre-fabricated in the factory. In the reinforced concrete column (1), the vertical bar (5) is reinforced concrete as shown in detail in FIG. 3 to avoid interference with the steel beam (2) because the upper steel beam (2) penetrates the interior of the reinforced concrete column (1) Concentrate on the four corners of the pillar (1), reinforcement, and separate the vertical bar (5) of the reinforced concrete column into a plurality of main bar groups to constrain each bar group using a predetermined shear bar (6).

Steel beams (2) penetrates the reinforced concrete column (1) in the + -shaped, T-shaped, A-shaped according to the installation position of the building of the reinforced concrete column (1), generally uses H-shaped steel. In addition, the upper and lower portions of the steel beams are defined as a flange, and the portion connecting the upper and lower flanges is defined as a web. Like the reinforced concrete column, such steel beams can be produced by welding and the like in the form required at the work site, and also can be manufactured in the required form at the work site in the factory.

Reinforcing plate (3) connecting the upper and lower flanges and the web of the steel beam (2) at right angles to the web of the steel beam (2) at the same position as the outer surface of the reinforced concrete column (1) Install in each direction. In addition, the outer reinforcing plate (4) in each direction to the outer side of the upper and lower flanges of the steel beams (2) at the same position as the outer surface of the reinforced concrete column (1) is provided in a c-shape. Reinforcing plate (3) connecting the upper, lower flange and the web of the steel beam (2) restrains the concrete filled in the joint structure to increase the acupressure strength and shear strength of the joint structure, the steel beam (2 The outer reinforcing plate (4) installed to the outside of the upper, lower flange of the) serves to prevent the pressure breakdown of the reinforced concrete column (1) by making the steel beam (2) to be horizontal to the ground in the reinforced concrete column.

It prevents the buckling of the vertical main bar (5) concentrated at the four corners of the reinforced concrete column (1), restrains the concrete inside the reinforced concrete column (1) and the steel beam (2) joint structure, thereby restraining the concrete Reinforcement using shear reinforcement (6) which serves to allow the beam (2) to be integrally behaving. According to the experiment, a method in which the shear reinforcement 6 is manufactured in a closed type, in which the shear reinforcement 6 is connected to the web of the steel beam 2 by welding or by drilling a hole in the web, connects the entire vertical bar 5. Even without the use of the vertical caster 5 in the process of pouring concrete, the vertical caster 5 is not buckled by the shear bar 6 can reinforce the tensile force of the concrete. Each of the vertical bars 5 separated by the steel beams 2 without making the shear bars 6 closed and connected to the webs of the steel beams 2 or by drilling holes in the webs to constrain each major bar as a whole It is designed to be able to bind the main groups independently. By using the closed reinforcing bar 6, the plurality of vertical bars 5 constituting the reinforced concrete column 1 are separated by a steel beam 2 into a plurality of groups of main bars, and each separated main bar The group is constrained by a sheared reinforcement 6 that is made closed. As shown in FIG. 4, a plurality of shear reinforcing bars 6 are installed in a single main bar group at a predetermined distance in the vertical direction to the vertical bar 5 to restrain the main bar group. Shear reinforcement (6) can be produced in various forms, such as triangle or square, depending on the reinforcement of the vertical main bar (5) of the reinforced concrete column (1).

Then, after the formwork is installed in the joints of the reinforced concrete column (1) and the steel beam (2) produced according to the above description, the concrete is poured and cured to finally the reinforced concrete column (1) and steel beam (2) Complete the joint structure of).

According to the joint structure of the reinforced concrete column and the steel beam according to the present invention, since the vertical reinforcement of the reinforced concrete column is installed by separating the vertical main bar of the reinforced concrete column into several vertical main groups, unlike installing the whole vertical bar In order to install the shear reinforcing bars, a separate device is not needed, and in order to horizontally restrain the vertical main bar of the reinforced concrete column, a hole is inserted into the web and a shear reinforcing bar is inserted into the web, or a shear reinforcing bar is inserted into the web. It is not necessary to constrain the vertical main bars of reinforced concrete columns laterally by welding them, so the work process can be simplified, and it is necessary to manufacture the joint structure of reinforced concrete columns and steel beams at the work site. Reduction of expenses and personnel

While the preferred embodiments of the present invention have been described using specific terms, such descriptions are for illustrative purposes only, and it is understood that various changes and modifications may be made without departing from the spirit and scope of the following claims. Should be done.

Claims (6)

Reinforced concrete pillars having a plurality of vertical vertical roots vertically embedded in the pillar to reinforce the tensile force of the pillar; Steel frame beam penetrating the reinforced concrete column; And The plurality of vertical reinforcing bar is separated into a plurality of main groups by the steel beams, and consists of a plurality of shear reinforcing bars interconnecting each of the plurality of main bars separated into the group, the shear reinforcing bar is characterized in that the contact with the steel beams The joint structure of reinforced concrete columns and steel beams. The method of claim 1, Joining structure of the reinforced concrete column and the steel beam, characterized in that it further comprises a reinforcing plate installed between the upper and lower flanges and the web of the steel beam. The method of claim 1, The joined structure of the reinforced concrete column and the steel beam, characterized in that it further comprises an external reinforcing plate is installed on the outside of the upper and lower flanges of the steel beam. Manufacturing a reinforced concrete column by embedding a plurality of vertical heads vertically inside the column to reinforce the tensile force of the column; Penetrating a steel beam to the reinforced concrete column; Separating the plurality of vertical bars into a plurality of groups of main bars by the steel beams, and separating and restraining the plurality of shear bars connecting each of the plurality of main bars separated into the groups; And Placing concrete and curing the vertical main and the shear reinforcement, the junction structure of the reinforced concrete column and the steel beam, characterized in that the shear reinforcement is not in contact with the steel beam. The method of claim 4, wherein Joining structure of the reinforced concrete column and the steel beam further comprising the step of installing a reinforcing plate between the upper and lower flanges and the web of the steel beam. The method of claim 4, wherein Reinforced concrete pillars and the method of manufacturing a joint structure of the steel beam further comprising the step of installing an external reinforcing plate on the outside of the upper and lower flanges of the steel beam.