KR100898283B1 - Steel-frame for SRC-frame that steel reinforcement is pre-assembled and Steel-frame structure execution method by using the steel-frame - Google Patents

Abstract

The present invention relates to a steel pillar for SRC columns pre-assembled reinforcing bar and steel frame construction method using the same, and more specifically, the construction of the steel column after the pre-assembly of the cast iron and strip reinforcement in the H- section steel This prevents safety accidents caused by aerial work, improves the construction accuracy of rebars, shortens the construction period compared to the method of assembling rebars in the air, and connects the main reinforcing bars located at one corner of the connecting bars. Steel frame pillars for SRC columns pre-assembled steel bars made of a structure that is in close contact with the reinforcing steel pillars is easily installed without interference with the main steel bars, and a steel frame construction method using the same.

To this end, H-beams, which are welded with gusset plates for welding steel beams, are seated on the workbench on the ground, and the connecting bars are welded with a structure surrounding the H-beams, and then a plurality of cast bars are placed at each corner of the connecting bars. The steel reinforcement pillars are wound around the reinforcing steel bars to complete the steel pillars, and the steel pillars are pre-assembled with steel bars to install steel steel beams by lifting the steel pillars upright in the workshop, and a steel frame construction method using the same.

SRC columns, steel columns, steel beams, gusset plates, H-beams, band bars, cast bars, connecting bars

Description

Steel frame for SRC pillars with pre-assembled steel bars and steel frame construction method {Steel-frame for SRC-frame that steel reinforcement is pre-assembled and Steel-frame structure execution method by using the steel-frame}

The present invention relates to a steel pillar for SRC columns pre-assembled reinforcing bar and steel frame construction method using the same, and more specifically, the construction of the steel column after the pre-assembly of the cast iron and strip reinforcement in the H- section steel This prevents safety accidents caused by aerial work, improves the construction accuracy of rebars, shortens the construction period compared to the method of assembling rebars in the air, and connects the main reinforcing bars located at one corner of the connecting bars. Steel frame pillars for SRC columns pre-assembled steel bars made of a structure that is in close contact with the reinforcing steel pillars is easily installed without interference with the main steel bars, and a steel frame construction method using the same.

In general, steel framed reinforced concrete construction (SRC) is a structure made of a single body by surrounding concrete with steel bars and casting concrete therein, that is, intermediate structure between reinforced concrete structure and steel structure. .

The reinforced concrete structure is a structure that reinforces the reinforcing bar reinforced with concrete that is strong in compressive force but very weak in tensile force, and is used structurally and economically, and the reinforced concrete structure is used in spite of various advantages. The larger the cross-section and weight, the higher the weight and the higher the floor, the more thick the column and the smaller the effective area.The weaker the warpage, the more unsuitable for long span buildings (spans of 7 to 8m or more) or high-rise buildings. Since it is necessary to pour and cure concrete, it takes a lot of construction period, and it is difficult to uniform construction, which requires thorough management.

On the other hand, the steel structure is a structure that can absorb a lot of deformation energy due to earthquake, wind, impact, etc., because the strength and ductility of the material is superior to the reinforced concrete, while having advantages in high-rise or high-rise buildings or long span buildings, The member is easy to buckle against the compressive force, the strength and deformation are easily caused by high temperature during welding connection, and it is easy to be rusted with moisture.

Therefore, in order to make up for the shortcomings between the two, a mixed structure (eg, a reinforced concrete structure in the lower layer and a steel structure in the upper layer) and a composite structure composed of a single member having different columns and beams (for example, a pillar) Is made of reinforced concrete and beams made of steel). Especially, it is a composite structure that combines the advantages of each single member rather than a simple mixed structure. Reinforced concrete structures are actively being developed.

This steel reinforced large concrete structure is a form of covering and reinforcing the steel frame with reinforced concrete, the external force is borne by the steel frame and the reinforced concrete surrounding the reinforcement as a coating in the event of fire.

In general, fire resistant structures of 5 or 6 floors are mainly reinforced concrete structures, and more floor buildings have reinforced concrete structures, which increase the weight of the building and support the lower floors so that the cross section of columns and beams on the lower floor is excessive. In the high-rise construction, steel reinforced concrete is used because high economic strength and function of steel are used as the main structure, and the structure of surrounding structure is reinforced with reinforced concrete to compensate for the decrease in strength of steel in case of fire. The structure is often referred to as " SRC ".

These SRC columns are placed on a structure consisting of H-section steel that is erected up and down on the ground, cast steel bars that are erected on each capillary side of the H-beam, and a band reinforcing steel bar that encloses the steel reinforcement to integrate the H-shaped steel and the cast steel. Refers to the pillar formed.

Hereinafter, the problem with the rebar assembly method of the conventional SRC column will be described.

The plurality of H-beams are constructed in a workshop by a conventional crane, and H-beams are reinforced by column-shaped formwork after the main reinforcing bars and the band reinforcing bars are assembled in a joining manner by a ties. It is mounted on the section steel and SRC columns are completed by placing and curing concrete in the formwork.

As such, in the related art, H-shaped steel is first placed in the workshop, and the assembly process of the SRC pillar is performed by joining various rebars.

However, such assembling process has a problem that the worker ascends to the H-shaped steel of the high-rise height to directly assemble the reinforcing bar, the stability of the work is not secured, the site management is not easily made.

In addition, by providing a separate work device, there is a problem that the assembly process period is increased, and the work process is complicated.

The present invention has been made in order to solve the above problems, after mounting the H-shaped steel welded gusset plate for welding cheolgolbo is mounted on the upper surface of the workbench, and pre-assembled the connecting reinforcement with a structure surrounding the H-shaped steel By placing a plurality of cast steel bars at each corner of the connecting reinforcing bar, and winding the cast steel bars with a banded steel bar to complete the steel frame column, and installing the steel steel beams by lifting the steel column columns upright in the workshop, The purpose of the present invention is to provide a steel pillar column for the SRC column, which is pre-assembled with reinforcing steel bars, by placing H-beams on a workbench on the ground, and a method of constructing steel frames using the same.

In order to achieve the above object, the present invention seats the H-beam steel, which is welded with a gusset plate for welding steel cheolgolbo, on the work surface of the ground, and installs the connecting reinforcing steel in the structure surrounding the H-beam. Installing a plurality of connecting bars at predetermined intervals along a longitudinal direction of the; Pre-assembling the main reinforcing bar at each corner of the connecting reinforcing bar, and winding the main reinforcing bar with a band reinforcing bar to complete the steel column for the SRC pillar; Installing the steel column vertically at each column position of a building; And fastening the bolts to the gusset plates of the steel frame pillars adjacent to both ends of the steel frame beams to horizontally install the steel frame beams on the steel frame pillars.

In a preferred embodiment, the work table and the beam is installed on the ground; It is characterized by consisting of a wooden support that is installed on the beam to support the H-shaped steel disposed laterally on the beam.

In another preferred embodiment, the connecting reinforcing bar is characterized in that the installation of the reinforcing bars in the '井' structure at each installation position of the H-shaped steel.

In addition, the steel reinforcement is characterized in that the main reinforcing bars are pre-assembled in the corner portion of the connection reinforcement in the steel frame to be installed without the interference of the pre-assembled cast steel reinforcement in the steel frame in line with the connection reinforcement.

And, in order to prevent the interference with the swinging cheolgolbo, the connecting reinforcing bar is fixed in a row to move the installation to the inside of the H-beams so that the fixed fixed steel bars do not protrude out of the H-beams It features.

In addition, the main reinforcing bars fixed to the connecting reinforcing bar is characterized in that the fastening to the reinforcing bars by moving to the band reinforcing bars after installing the cheolgolbo on the steel column.

In another preferred embodiment, the H-beam; Gusset plate is welded to the web and flange of the H-beam for fastening the bolt of the cheolgolbo; A connecting reinforcing bar installed in a structure surrounding the H-shaped steel, the plurality of connecting bars being installed at predetermined intervals along the longitudinal direction of the H-shaped steel; A main reinforcing bar pre-assembled by binding to the connecting reinforcing bar and the following band reinforcing bar; A band reinforcing bar fixed to the main bar so as to have a structure in which the main bar is wound; Characterized in that comprises a.

In addition, the connecting reinforcing bar is characterized in that the reinforcing bar is welded in a '井' structure at each installation position of the H-shaped steel.

In addition, the main steel bars pre-assembled in the corner portion of the connection reinforcement in the steel frame so that the steel frame can be installed swinging without interference of the pre-assembled main steel bars in the steel frame is characterized in that the binding to the connection steel.

In addition, the connecting reinforcing bar is fixed in a row is connected to the reinforcing bar is installed in a position moved in the inward direction of the H-shaped steel is characterized in that the main reinforcing bar fixed to the connecting bar does not protrude out of the H-shaped steel .

As seen above, the steel column for SRC columns pre-assembled rebar according to the present invention and the steel frame construction method using the same provides the following effects.

First of all, before lifting the steel pillars, H-shaped steel is placed on the workbench on the ground to assemble the reinforcing bars, thereby preventing safety accidents caused by aerial work, and improving the construction accuracy of the reinforcing bars.

Therefore, it is easier to manage the site compared to the method of assembling the rebar in the air, shorten the construction period,

In addition, the main reinforcing bar disposed at one corner of the connecting reinforcing bar is formed in a structure in close contact with the connecting reinforcing steel beams on the steel column has the effect that can be easily performed without interference with the main reinforcing bars.

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

1 is a view showing a work bench of an H-shaped steel according to an embodiment of the present invention, FIGS. 2 to 4 are rebar line assembly process diagrams of an iron pillar according to an embodiment of the present invention, and FIGS. 5 to 8. Is a process chart in which the cheolgolbo is installed in the iron pillar according to an embodiment of the present invention.

As shown in FIGS. 1 to 8, the rebar prefabrication method of the SRC column welds the connecting rebar 140 to the H-shaped steel 100 seated on the work bench 130, and the connecting rebar 140 is welded. After pre-assembling the main reinforcing rod 160 and the band reinforcing bar 170 to the H-shaped steel (100) to complete the steel column (200), the steel column (200) in the vertical position at each column position of the building It consists of the step of installing the cheolgolbo 210 in 200.

First, as shown in FIG. 1 and FIG. 2, the H-shaped steel 100 in which the gusset plate 150 for welding is installed is seated on the work bench 130 mounted horizontally on the ground so that reinforcing steel can be easily assembled. do.

At this time, the work bench 130 is a beam 90 installed on the ground horizontally to the H-beam 100, and the beam 90 and the H-beam 100 to support the H-beam 100 It consists of a wooden support 80 is installed between, the H-shaped steel 100 on top of the wooden support 80 is preferably seated so that the flange 110 is placed on the bottom.

Here, the beam 90 is preferably made of the same material as the H-shaped steel 100, the width of the wooden support portion 80 is formed smaller than the width of the flange 110 of the H-shaped steel (100) It is preferable.

When the width of the timber support 80 is greater than the width of the flange 110, the main reinforcement 160 disposed on the lower edge of the H-shaped steel 100 is the band reinforcement 170 by interference with the timber support 80 This is because it is difficult to assemble the main reinforcing bar 160, since the space to be bound is not secured.

In addition, by welding the gusset plate 150 to the H-shaped steel 100 in the factory before the H-shaped steel 100 is transported to the workplace, H-shaped steel 100 is already installed in the factory gusset plate 150 It is preferable to proceed with the operation of assembling the reinforcing bar in the H-shaped steel 100 is installed gusset plate 150 is transferred to the workshop.

Here, the gusset plate 150 is shown in the plan view of FIG. 2 so that the web or flange of the cheolgolbo 210 is located at the center of the steel frame 200 when the cheolgolbo 210 is coupled to the steel column 200 As shown in the center line of the steel column pillar surface is preferably installed spaced apart by the thickness of the web or flange of the cheolgolbo 210.

In addition, the upper and lower portions of the gusset plate 150 welded to the web of the H-shaped steel by welding the iron plate 50, the gusset plate 150 bolted to the cheolgolbo 210 is installed in the H-shaped steel 100 It is preferable to increase the fixing force for supporting the cheolgolbo 210.

Next, as shown in FIG. 3, the welding bar is installed on the H-shaped steel in which the gusset plate is installed, but it is preferable to install the H-shaped steel at regular intervals in the longitudinal direction.

In particular, the connecting reinforcing bar 140 is installed longer than each outer surface of the H-shaped steel 100 is formed four corner space where the main reinforcing bars 160 are assembled, the connecting reinforcing bars 140 forming a "井" shape The structure 145 is installed in the H-shaped steel 100 by two to three places by layer to ensure that the main reinforcement 160 and the band reinforcement 170 are installed in a stable manner.

In this case, the plurality of connecting bars 140 is preferably welded to each of the connecting bars 140 or the flange 110 of the H-shaped steel 100 in close contact with the H-shaped steel (100).

In addition, as shown in the plan view of FIG. 3, the connecting reinforcing bars 140, in which the main reinforcing bars 160 are aligned in a line, are welded and installed at a position moved inwardly of the H-shaped steel 100, and the connecting reinforcing bars 140 are installed. It is preferable to prevent the main reinforcing bar 160 is fixed to the protruding out of the H-shaped steel (100).

This is to secure the movement path of the cheolgolbo 210 so that the cheolgolbo 210 is prevented from interfering with the main reinforcement 160 during the swing of the cheolgolbo 210.

After the installation of the connecting reinforcing bars 140, as shown in Figure 4, the plurality of the main reinforcing bars 160 are disposed at the corners of the connecting reinforcing bars 140, using the plurality of strip reinforcing bars (170) 160).

In one embodiment, as shown in the plan view of Figure 4, the reinforcing bar 160 may be arranged three per one corner of the reinforcing bar 140, two of the two main bar 160 is connected to the reinforcing bar 140 And it is installed on the strip reinforcing bar 170 by the binding line or welding, one main reinforcing bar 160 may be installed at the edge of the band reinforcing bar 170.

However, the three corner portion is a triangular structure (two main bars are installed at the end of the connecting bar, one main bar is installed at the edge of the band reinforcing bar), the main reinforcement 160 is installed, the other one corner (steel ball is A corner portion of the swinging direction (A) is a line structure in which three main reinforcing bars 160 are in close contact with the band reinforcing bar 170 as shown in FIG. 4 (not shown, which typically combines reinforcing bars and reinforcing bars). It is preferable to install by a fine line).

Here, the connecting reinforcing bar of the corner portion (A) is welded at a position moved by the diameter of the cast steel 160 in the inward direction of the H-shaped steel 100, as described above, the cast steel 160 is the corner Even if the line (A) is installed in line with the reinforcing bar so that the main reinforcement 160 does not protrude to the outside of the H-shaped steel (100).

This is the cheolgolbo 210 is swinged in the direction of the gusset plate 150 bonded to the H-beam (100) to be connected to the cheolgolbo 210 to the steel column (200) upright (standing upright) in the workplace In this case, the cheolgolbo 210 to prevent the interference with the main reinforcing bars (160).

At this time, the steel reinforcement beam 210 is also the same as the steel pillars 200, the main reinforcement 160 is assembled in a structure in which one corner portion is opened, the two-way steel golbo 210 is installed on the steel column 200 without interference of the main reinforcement It is possible to do

However, in the case of installing the cheolgolbo 210 in the four directions in the steel column (200), the open structure in which the main reinforcement 160 is bound to the band reinforcement 170 is formed in the two corners of the connecting reinforcement 140 It is preferable.

On the other hand, the main reinforcing bars 160 can be assembled in a number of three or more or less depending on the building structure or site conditions, and the installation structure of the main reinforcing bars 160 can be variously modified according to the number of installation.

In addition, by assembling the main reinforcement 160 formed longer than the H-shaped steel to protrude than the upper end of the H-shaped steel, by overlapping the main steel reinforcement of another steel column to the protruding installed main steel reinforcement 160 with a binding line, the steel column Multiple layers can be connected to each floor.

In addition, the band reinforcing bar 170 is not installed in the lower portion of the H-shaped steel 100 as shown in FIG. desirable.

As such, the gusset plate 150 having the plurality of bolt holes 155 formed thereon is welded to the web 120 and the flange 110 of the H-shaped steel 100, and a plurality of connecting bars are attached to the H-shaped steel 100. After welding 140, the main reinforcement 160 is installed at each corner of the connecting reinforcement 140 and wound around the band reinforcement 170, thereby completing the steel column 200 for the SRC pillar by the rebar line assembly process. do.

Here, the steel bar pillar 200 for the SRC column pre-assembled the reinforcing bar is H-shaped steel (100) seated on the work surface 130 of the ground, and the structure to surround the H-shaped steel 100 "井" shape The connecting reinforcing bar 140 to be welded, the gusset plate 150 for joining to the web 120 and the flange 110 of the H-shaped steel 100, and the respective corners of the connecting reinforcing bar 140 It is preferable that the main reinforcing bar 160 and the band reinforcing bar 170 is connected to the main reinforcing bar 160 in a structure in which the main reinforcing bar 160 is wound.

The completed steel column 200 is lifted (set upright) to the desired position of the workplace using a conventional tower crane, as shown in Figure 5, the number of steel columns 200 being lifted to the characteristics of the building structure It is desirable to vary.

After the steel column is lifted, as shown in FIG. 6, the cheolgolbo 210 swings on all sides of the steel column 200, the cheolgolbo 210 is the web 120 of the H-shaped steel 100 and Bolting is coupled to the plurality of gusset plates 150 installed on the flange (110).

At this time, when the cheolgolbo 210 is swinging as shown in Figure 4, one corner portion (A) of the connection reinforcement 140 is installed in a structure in which the main reinforcement 160 is in close contact with the connection reinforcing bar 140 The cheolgolbo 210 is moved in the direction in contact with the gusset plate 150 without interference of the main reinforcement 160.

In addition, in one embodiment, as shown in FIG. 6, the gusset plate 150 is installed inside the outline B formed by the band reinforcing bar 170, and a bolt hole 155 is provided in the gusset plate. It is preferable to form in one row.

However, when the gusset plate 150 formed with one row of the bolt holes 155 is used, it is difficult to fasten the bolts of the cheolgolbo 210 due to the interference between the wrench and the main reinforcing rod 160 which are necessary tools for fastening the bolts during bolting. As such, it is preferable that the wrench be sized enough to be inserted between the main reinforcement 160 and the gusset plate 150.

In addition, in another embodiment, as shown in FIG. 7, the gusset plate 150 is formed outside the outline B formed by the band reinforcing bar 170, and the wrench and the main reinforcing bar 160 are not limited in size. By preventing the interference of the bolt, it is possible to facilitate the fastening operation of the bolt.

Here, the bolt hole 155 that is the junction of the steel column and the cheolgolbo 210 is far from the steel column 200 bar bolt hole 155 to increase the coupling force of the steel column 200 and the cheolgolbo 210 It is preferable to form in two rows.

Next, after the cheolgolbo 210 is bolted to the gusset plate 150 of the steel column 200, the structure of the main reinforcement 160 is formed in close contact with one corner (A) of the connecting reinforcing bar 140 is shown in FIG. As shown in the figure, it is preferable that the two main bars 160 move in the direction of the band reinforcing bar 170 so as to be changed in the same manner as the structure of the main reinforcing bars 160 of the other corners.

Here, the moving cast iron 160 is coupled to the connecting reinforcing bar 140 in a fine binding line, the band reinforcing bar 170 to move the main reinforcing bar 160 after dismantling the binding line to move the main reinforcing rod 160 It is preferable to recombine with the bond line.

After the main reinforcing bar 160 is moved by overlapping the main reinforcing bar of another steel frame pillar to the main reinforcing bar 160 protruding from the upper of the existing steel frame 200, a plurality of steel pillars according to the building structure layer It is possible to be connected continuously.

In addition, the steel frame pillar 200 is installed in the steel column 200 is formed in a form suitable for the building structure, the concrete is cast and cured in the form, the SRC pillar is completed.

While the invention has been shown and described with respect to certain preferred embodiments thereof, the invention is not limited to these embodiments, and has been claimed by those of ordinary skill in the art to which the invention pertains. It includes all the various forms of embodiments that can be carried out without departing from the spirit.

1 is a working table of the H-shaped steel according to an embodiment of the present invention,

2 to 4 is a rebar line assembly process diagram of the iron pillar according to an embodiment of the present invention,

5 to 8 is a process chart in which the cheolgolbo is installed in the iron pillar according to an embodiment of the present invention,

<Description of the symbols for the main parts of the drawings>

100: H-shaped steel 140: connecting rebar

150: gusset plate 155: bolt hole

160: cast iron 170: band steel

200: steel column 210: steel ball

Claims (10)

After installing the H-beam steel welded by the gusset plate for welding to the cheolgolbo is installed on the upper surface of the workbench, the connecting bars are welded and installed in a structure surrounding the H-beam, but a plurality of intervals are determined along the longitudinal direction of the H-beam. Installing connecting reinforcing bars; Pre-assembling the main reinforcing bar at each corner of the connecting reinforcing bar, and winding the main reinforcing bar with a band reinforcing bar to complete the steel column for the SRC pillar; Installing the steel column vertically at each column position of a building; Fastening the bolts to the gusset plates of the steel pillars adjacent to both ends of the cheolgolbo to horizontally install the cheolgolbo on the steel pillars; Steel frame construction method using the steel frame pillar for the SRC column pre-assembled reinforcement including a. The method of claim 1, wherein the workbench is a beam installed on the ground; Steel frame construction method using a steel column for the SRC column pre-assembled reinforcement, characterized in that the wooden support is installed on the beam to support the H-shaped steel disposed laterally on the beam. The method of claim 1, wherein the connecting reinforcing bar is a steel frame construction method using a steel column for pre-assembled SRC columns, characterized in that the reinforcing bars are installed in each of the installation position of the H-shaped steel in the '井' structure. The method according to claim 1, characterized in that the main steel bars pre-assembled in the corner portion of the connection reinforcing bars in the steel frame to be installed so as to swing the steel beams without interference of the pre-assembled cast steel bars in the steel column Steel frame construction method using steel column for SRC columns pre-assembled to the rebar. The method of claim 4, wherein in order to prevent interference with the swinging cheolgolbo, the connecting reinforcing bars are fixed in a line is installed by moving to the inner side of the H-beams by fixing the fixed steel bars do not protrude out of the H-beams Steel frame construction method using a steel column for the SRC column pre-assembled reinforcing bar characterized in that not to. The method of claim 4, wherein the main reinforcing bars are fixed to the connecting reinforcing bars after installing the cheolgolbo on the steel column to move to the band reinforcement, characterized in that the reinforcing steel bars pre-assembled steel reinforcing bars Steel frame construction method. H-beams; Gusset plate is welded to the web and flange of the H-beam for fastening the bolt of the cheolgolbo; A connecting reinforcing bar installed in a structure surrounding the H-shaped steel, the plurality of connecting bars being installed at predetermined intervals along the longitudinal direction of the H-shaped steel; A main reinforcing bar pre-assembled by binding to the connecting reinforcing bar and the following band reinforcing bar; A band reinforcing bar fixed to the main bar so as to have a structure in which the main bar is wound; Reinforced steel bars are pre-assembled, including a steel column pillar. The method according to claim 7, wherein the reinforcing steel bar is SRC column pre-assembled reinforcing steel bar, characterized in that the reinforcing steel bar is constructed by welding the '井' structure at each installation position of the H-shaped steel. The method according to claim 7, wherein the steel bars are pre-assembled in the corner of the connection reinforcement in the steel column so that the steel beams can be installed swinging without interference of the pre-assembled main steel bars are characterized in that the fixed to the connection reinforcing bars Steel frame pillar for SRC columns with prefabricated bars. 10. The method of claim 9, wherein the connecting bars to which the main reinforcing bars are fixed in a line is installed in a position moved in the inward direction of the H-shaped steel so that the main reinforcing bars fixed to the connecting bars do not protrude out of the H-shaped steel Steel frame pillars for SRC columns pre-assembled reinforcing bars.

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