KR20200048072A - Built-up structure consisting of precast concrete column and steel beam and built-up method of the same - Google Patents

Abstract

Disclosed is a coupling structure of a precast concrete column and a steel beam and a method of combining the same. The precast concrete pillar and the steel beam combination structure of the present invention include: a first pillar in which a plurality of first main reinforcing bars are embedded in the first concrete portion; A connector seated on the upper end of the first pillar; Cheolgolbo coupled to the connector; A slab supported by a steel beam and a connecting body; And a second pillar in which the lower end is seated on the slab, and a plurality of second main reinforcing bars are embedded in the second concrete part, and the first main reinforcing bar penetrates the connecting body and is connected to the second main reinforcing bar, and the first main reinforcing bar and the second main reinforcing bar. The main rebar is characterized by constraining the movement and rotation of the connecting body.

Description

Precast concrete column and steel beam combination structure and its combination method {BUILT-UP STRUCTURE CONSISTING OF PRECAST CONCRETE COLUMN AND STEEL BEAM AND BUILT-UP METHOD OF THE SAME}

The present invention relates to a coupling structure of a precast concrete column and a steel beam, and more specifically, a precast concrete column and a steel beam made of a pre-concrete concrete column and a steel beam to easily form a solid bonding structure. It relates to a bonding structure and a bonding method thereof.

In general, the construction of a large-reinforced concrete structure is carried out in the field by a wet method, and labor costs, formwork costs, and construction costs are increased. Therefore, there is an increasing need for a precast concrete method that can compensate for this problem. The precast concrete construction method has the advantage of minimizing the amount of work in the field as a dry construction method. In addition, the precast concrete member is made of good quality and can be used for the exterior of the building and has the economical advantage of being reusable.

In this regard, Korean Patent Publication No. 2015-0012790 discloses a hollow precast pillar and a method for constructing the pillar. Published Patent Publication No. 2015-0012790, a step of vertically erecting a first pillar having a support portion having an outer circumferential surface of the upper portion formed wider than an outer circumferential surface of the upper portion, and putting a precast beam on the upper portion of the support portion to form a floor slab The step of installing, the step of rebar reinforcement on the upper part of the precast beam and the formwork, the step of coupling the splice sleeve to the end of the first main reinforcing bar extending above the first column, and formed inside the first column Pouring concrete into the first hollow part, the precast beam and the floor slab, and inserting a second main reinforcing bar extending under the second column into the splice sleeve after the concrete is cured, and filling material in the splice sleeve It characterized in that it comprises a step of filling.

Published Patent Publication No. 2015-0012790 is a mechanical joint that joins the first main reinforcing bar of the upper and lower columns using a splice sleeve, and a double joint that is inserted into the first hollow portion formed in the upper column by bending the auxiliary reinforcing bar. Since it is used at the same time, it has the advantage of increasing the strength of the connection and firmly joining.

However, Patent Publication No. 2015-0012790 has a structure in which the precast beam is placed on the edge of the concrete part to prevent the precast beam from being detached from the upper part of the concrete part due to the vertical load. It can be said that the structure is still vulnerable to collapse.

That is, in the event of a high intensity earthquake, if the precast beam deviates even slightly from the edge of the concrete part, the precast beam may collapse rapidly. Of course, Patent Publication No. 2015-0012790 has installed a hook reinforcing bar and poured concrete into the first hollow of the precast beam and the hollow precast column to increase the bonding force between the precast beam and the hollow precast column. It is difficult to say that the combined structure of hook reinforcing bars and concrete is stable against high-strength earthquakes.

In addition, Patent Publication No. 2015-0012790 has a disadvantage that it is difficult to level the precast beam because it forms a structure that simply puts the precast beam on the edge of the concrete portion. That is, in order to level the precast beam, a separate device must be installed between both the precast pillars and the precast beam, and the edge of the concrete portion on which the precast beam is raised is narrow, making it vulnerable to collapse of the precast beam.

Republic of Korea Patent Publication No. 2015-0012790 (Publication date: 2015.02.04)

The object of the present invention is to form a strong and easy coupling structure of the precast concrete column and the steel beam, while the precast concrete column and the steel beam are configured to easily and firmly align the precast beam and the coupling method thereof. Is to provide

The object is, in accordance with the present invention, a plurality of first main reinforcing bars in a first concrete portion is embedded in a first pillar; A connection member seated at an upper end of the first pillar; Cheolgolbo coupled to the connector; A slab supported by the steel beam and the connecting body; And a second pillar in which the lower end is seated on the slab, and a plurality of second main reinforcing bars are embedded in the second concrete part, wherein the first main reinforcing bars penetrate the connecting body and are connected to the second main reinforcing bars, and the first The 1st reinforcing bar and the 2nd reinforcing bar are achieved by a coupling structure of a precast concrete column and a steel beam, characterized by restraining the movement and rotation of the connecting body.

A first insertion groove is formed at an upper end of the first pillar, a second insertion groove is formed at a lower end of the second pillar, and the connecting body is a pillar inserted into the first insertion groove and the second insertion groove part; And a beam extending laterally from the pillar portion, and to which the steel beam is coupled, wherein the beam portion may be formed with a plurality of through holes through which the plurality of first main reinforcing bars respectively pass.

A plurality of support nuts may be interposed between the first concrete portion and the beam portion to support the beam portion, and the support nut may be respectively screwed to the first main reinforcing bar to level the beam portion.

Concrete may be filled in the first insertion groove and the second insertion groove to constrain movement and rotation of the pillar portion.

The object, according to the present invention, a connecting body coupling step of coupling the connecting body to the upper end of the first pillar; Cheolgolbo coupling step of coupling the cheolgolbo to the connection; A pouring step of forming a slab on top of the steel beam and the connecting body; And a column joining step of joining a second column to the upper end of the connecting body, wherein the first column has a plurality of first main reinforcing bars embedded in the first concrete unit, and the second column has a plurality of second main reinforcing bars. It is embedded in a second concrete portion, and in the coupling step, the first main reinforcing bar penetrates the connecting body, and in the pillar coupling step, the first main reinforcing bar is connected to the second main reinforcing bar and moves the connecting body. And it is achieved by a method of combining the structure of the precast concrete pillars and steel beams, characterized in that to limit the rotation.

A first insertion groove is formed at an upper end of the first pillar, a second insertion groove is formed at a lower end of the second pillar, and the connecting body is a pillar inserted into the first insertion groove and the second insertion groove part; And a beam extending laterally from the pillar portion, and to which the steel beam is coupled, wherein the beam portion may be formed with a plurality of through holes through which the plurality of first main reinforcing bars respectively pass.

In the coupling step, a plurality of support nuts are interposed between the first concrete portion and the beam to support the beam, and the support nuts are respectively screwed to the first main reinforcing bar to level the beam. It can be made as possible.

According to the present invention, the pillar portion is inserted into the first insertion groove and the second insertion groove, and the first main reinforcing bar is connected to the second main reinforcing bar through the beam portion, thereby facilitating the connection between the precast concrete column and the steel beam and making a strong coupling structure. It is possible to provide a coupling structure of a precast concrete column and a steel frame beam and a coupling method of the precast concrete pillar and the steel frame beam by forming and supporting the screw to be screwed to the first main reinforcing bar, respectively.

1 is a flow chart showing a method of bonding a precast concrete pillar and a steel beam structure according to an embodiment of the present invention.
2 and 3 are views showing a coupling structure of a precast concrete column and a steel beam according to an embodiment of the present invention.
Figure 4 (a) is a cross-sectional view AA of Figure 1 (c).
Fig. 4 (b) is a sectional view taken along line BB in Fig. 1 (c).

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted to clarify the gist of the present invention.

The coupling structure of the precast concrete pillar and the steel frame beam of the present invention and a method of coupling the same are made to easily and firmly level the precast beam while forming a strong and easy coupling structure between the precast concrete column and the steel frame beam.

1 is a flow chart showing a method of coupling a precast concrete pillar and a steel frame beam according to an embodiment of the present invention, and FIGS. 2 and 3 are a combination of a precast concrete column and a steel frame beam according to an embodiment of the present invention 4 (a) is a cross-sectional view taken along line AA of FIG. 1 (c), and FIG. 4 (b) is a cross-sectional view taken along line BB of FIG. 1 (c).

As shown in Figure 1, the method of coupling (S100) of the coupling structure 10 of the precast concrete column and the steel frame beam 400 according to an embodiment of the present invention, the connecting body coupling step (S110), the steel frame beam coupling step (S120), the pouring step (S130) and the pillar coupling step (S140). The coupling structure 10 of the precast concrete column and the steel frame beam 400 can be understood in detail through the description of the coupling method (S100).

As shown in Figure 2 (b), the connecting body coupling step (S110) is a step of coupling the connecting body 300 to the upper end of the first pillar 100. The first pillar 100 is provided as a precast concrete pillar.

Precast concrete is a reinforced concrete member molded into a mold in a factory or the like. It is a ready-made product by manufacturing the required members such as pillars, beams, and floor plates by steel formwork with a fixed facility in the factory, and short-term storage in a high-temperature and humid steam storage room. Can be constructed with.

As shown in Figure 2 (a), the first pillar 100 is installed on the ground before the connecting body coupling step (S110). As shown in FIG. 4 (b), the first pillar 100 is a structure in which a plurality of first main reinforcing bars 120 are embedded in the first concrete part 110, and a plurality of first main reinforcing bars are installed in the ground. 120 is protruded above the top of the first concrete portion (110).

As shown in Figure 2 (a), the first insertion groove 111 is formed at the upper end of the first pillar 100. The first insertion groove 111 is formed inside the plurality of first main reinforcing bars 120. As shown in FIG. 2 (a), the first insertion groove 111 may be formed long along the longitudinal direction of the first pillar 100.

As shown in Figures 2 and 4, the connecting body 300 is a configuration that connects the first pillar 100, the second pillar 200 and the steel frame beam 400, the connecting body coupling step (S110) 1 is seated on the upper end of the pillar (100). The connection body 300 includes a pillar portion 310 and a beam portion 320.

The pillar 310 is a portion inserted into the first insertion groove 111 and the second insertion groove 211, and is provided with a long section steel or steel pipe in the vertical direction. The beam portion 320 is a portion to which the steel frame beam 400 is coupled, and extends laterally from the pillar portion 310. As illustrated in FIG. 4, the beam portions 320 may extend from the middle of the pillar portion 310 in all directions. 2 and 4 show that the pillar portion 310 and the beam portion 320 are provided with H-shaped steel.

H-shaped steel (H-shaped) is a H-shaped steel section that is widely used for framing and civil engineering of large structures such as buildings and ships, and webs corresponding to the central horizontal bar. It consists of a flange (flange) corresponding to the vertical bar of.

In general, H-beam is mainly used to form the structure of a building, and is composed of a column installed vertically perpendicular to the ground to support the vertical force of the building, and a beam coupled horizontally to the column to support the horizontal force of the building. It is combined with rahmen (rigid frames) to form the skeleton of the building.

2 (b) and 4 (b), in the connecting body coupling step (S110), the lower portion of the pillar portion 310 is inserted into the first insertion groove 111. The connecting body 300, the lower portion of the pillar portion 310 is inserted into the first insertion groove 111, the flow to the external force in the horizontal direction is blocked. Shear connectors may be attached to the web and the flanges (before being inserted into the first insertion groove 111) on the upper and lower portions of the pillar portion 310.

In the connecting body coupling step (S110), the support nuts (N) are respectively screwed to the plurality of first main reinforcing bars (120) before the lower portion of the pillar portion (310) is inserted into the first insertion groove (111). The lower end of the support nut N is in contact with the upper end of the first concrete portion 110.

In the connecting body coupling step (S110), a plurality of first main reinforcing bars 120 penetrate the beam 320 in the process in which the lower portion of the pillar portion 310 is inserted into the first insertion groove 111. 4 (a), a plurality of through holes 321 through which a plurality of first main reinforcing bars 120 penetrate are formed in each of the upper and lower flanges of the beam portion 320. The plurality of first main reinforcing bars 120 penetrate the lower and upper flanges of the beam 320 through the plurality of through holes 321 and protrude above the beam 320.

As shown in Figure 2 (b), the plurality of support nuts (N), the first concrete portion 110 and the beam portion (with the lower portion of the pillar portion 310 inserted into the first insertion groove 111) 320). After confirming the level of the connecting member 300 connected to the crane, the operator selectively rotates the plurality of support nuts N to level the beam 320.

As shown in Figure 2 (c), after the leveling of the beam portion 320, the first insertion groove 111 is filled with concrete. The first pillar 100 and the connecting body 300 form a solid bonding force by the concrete (C, hereinafter 'filling concrete') filled in the first insertion groove 111. The pillar 310 is moved and rotated by the filling concrete (C).

As shown in FIG. 1, when the connecting body coupling step (S110) is completed, the steel beam coupling step (S120) is performed. As shown in Figure 2 (d), the steel beam coupling step (S120) is a step of coupling the steel beam 400 to the connecting body (300). The steel beam 400 is bolted or welded to the beam portion 320 by the connection plate 410. 2 and 3, only one end of the steel frame beam 400 is shown. Of course, the steel frame beam 400 is lifted by using a crane, so that both ends thereof are coupled to the beam portion 320 of different connecting bodies 300.

The steel beam 400 is shown as H-shaped steel in FIG. 2 (d), but is not limited to such structures as flat steel, C-shaped steel, T-shaped steel, Z-shaped steel, B-shaped steel, or square steel pipes. Of course, various types of steel materials that can be composed of horizontal beams can be selected.

As shown in Figure 1, when the steel beam beam coupling step (S120) is completed, the pouring step (S130) is performed. As shown in Figure 2 (f), the pouring step (S130) is a step of forming a slab 500 on top of the steel beam 400 and the connector 300. Although not shown in detail, the slab 500 is formed by formwork installation, reinforcement, and concrete pouring. At this time, the concrete is also poured between the first pillar 100 and the beam 320. The slab 500 is supported by the steel beam 400 and the connecting body 300.

2 (e), the head splice sleeves S are coupled to the plurality of first main reinforcing bars 120 before the pouring step S130. Head splice sleeve (S) is a configuration that connects the first main reinforcing bar 120 of the first column 100 and the second main reinforcing bar 220 of the second column 200, and the Republic of Korea filed by the applicant of the present invention Patent publication No. 2018-0110746 rebar joint device is used. The upper end portion of the first main reinforcing bar 120 is located in the sleeve S after the head is mounted. In the pouring step (S130), so that the concrete does not flow into the sleeve (S), the top of the sleeve (S) is covered with a stopper.

As shown in Figure 1, when the curing of the slab 500 concrete is completed, the column coupling step (S140) is performed. As shown in Figure 2 (g), the pillar coupling step (S140) is a step of coupling the second pillar 200 to the upper end of the connecting body (300). The second pillar 200 is provided as a precast concrete pillar.

The second pillar 200 is a configuration in which a plurality of second main reinforcing bars 220 are embedded in the second concrete part 210, and a plurality of second main reinforcing bars 220 are made in a state where the lower end is seated on the slab 500. 2 protrudes below the bottom of the concrete portion 210. The second insertion groove 211 is formed at the lower end of the second pillar 200. The second insertion groove 211 is formed inside the plurality of second main reinforcing bars 220. As shown in FIG. 2 (g), the second insertion groove 211 may be formed to be long along the longitudinal direction of the second pillar 200.

As shown in Figure 2 (g), in the column coupling step (S140), the upper portion of the pillar portion 310 is inserted into the second insertion groove 211, the lower portion of the second concrete portion on the upper surface of the slab 500 To settle down. In the second pillar 200, the pillar portion 310 is inserted into the second insertion groove 211, and the flow of the external force in the horizontal direction is blocked. As described above, shear connectors may be attached to webs and flanges at upper and lower portions of the pillar portion 310.

In the column coupling step (S140), the plurality of first main reinforcing bars 120 and the plurality of second main reinforcing bars 220 in the process of inserting the upper part of the pillar 310 into the second insertion groove 211 are head splice sleeves. (S). Referring to published patent publication No. 2018-0110746, the lower end of the second main reinforcing bar 220 in which the head is mounted is inserted into the sleeve S, and the shrinkage mortar is filled in the sleeve S. Before performing the column coupling step (S140), the cap on the top of the sleeve (S) is removed.

Although not shown, the second insertion groove 211 may be filled with concrete. The second pillar 200 and the connecting body 300 form a solid bonding force by concrete (not shown) filled in the second insertion groove 211. The second pillar 200 is moved and rotated by the filled concrete.

As shown in Figure 2 (g), in the column coupling step (S140), the first main reinforcing bar 120 and the second main reinforcing bar 220 are connected to each other to constrain the movement and rotation of the connecting body 300. That is, the coupling structure 10 of the precast concrete pillar and the steel frame beam 400 according to an embodiment of the present invention, the first insertion groove 111 and the second insertion groove 211 insertion structure of the pillar portion 310 , Column (310) flow confinement of the filling concrete (C), the first main reinforcing bar 120 and the second main reinforcing bar 220 by forming the movement and rotation restraint structure, stable structure against high-strength earthquake To form.

According to the present invention, the pillar portion is inserted into the first insertion groove and the second insertion groove, and the first main reinforcing bar is connected to the second main reinforcing bar through the beam portion, thereby facilitating the connection between the precast concrete column and the steel beam and making a strong coupling structure. It is possible to provide a coupling structure of a precast concrete column and a steel frame beam and a coupling method of the precast concrete pillar and the steel frame beam by forming and supporting the screw to be screwed to the first main reinforcing bar, respectively.

In the foregoing, although specific embodiments of the present invention have been described and illustrated, the present invention is not limited to the described embodiments, and it is common knowledge in the field of this technology that various modifications and modifications can be made without departing from the spirit and scope of the present invention. It is obvious to those who have it. Therefore, such modifications or variations should not be individually understood from the technical spirit or viewpoint of the present invention, and the modified embodiments should belong to the claims of the present invention.

10: coupling structure
100: first column 200: second column
110: first concrete portion 210: second concrete portion
111: first insertion groove 211: second insertion groove
C: Filling concrete 220: Second main rebar
120: first primary reinforcing bar 300: connecting body
N: support nut 310: pillar
S: Sleeve 320: Beam
400: steel frame beam 321: through hole
410: connection plate 500: slab

Claims (7)

A first pillar in which a plurality of first main reinforcing bars are embedded in the first concrete portion;
A connection member seated at an upper end of the first pillar;
Cheolgolbo coupled to the connector;
A slab supported by the steel beam and the connecting body; And
A lower end is seated on the slab, and a plurality of second main reinforcing bars includes a second pillar embedded in the second concrete part,
The first main reinforcing bar penetrates the connecting body and is connected to the second main reinforcing bar,
The first main reinforcing bar and the second main reinforcing bar are precast concrete pillars and steel beams, characterized in that constrain the movement and rotation of the connecting body. According to claim 1,
A first insertion groove is formed at an upper end of the first pillar,
A second insertion groove is formed at a lower end of the second pillar,
The connecting body,
A pillar part inserted into the first insertion groove and the second insertion groove; And
It includes a beam extending from the pillar portion to the side, the steel beam is coupled,
A coupling structure of a precast concrete column and a steel frame beam, characterized in that a plurality of through holes through which the plurality of first main reinforcing bars are respectively formed. According to claim 2,
A plurality of support nuts are interposed between the first concrete portion and the beam to support the beam,
The support nut, the precast concrete pillar and the steel beam structure, characterized in that each of the first main reinforcing bar is screwed to level the beam. According to claim 2,
The first inserting groove and the second inserting groove are precast concrete pillars and a steel beam coupling structure characterized in that concrete is filled to constrain movement and rotation of the pillars. A connecting body coupling step of coupling the connecting body to the upper end of the first pillar;
Cheolgolbo coupling step of coupling the cheolgolbo to the connection;
A pouring step of forming a slab on top of the steel beam and the connecting body; And
And a column coupling step of coupling the second column to the upper end of the connection body.
The first pillar has a plurality of first reinforcing bars embedded in the first concrete portion,
In the second pillar, a plurality of second main rebars are embedded in the second concrete portion,
In the connecting body coupling step, the first main reinforcing bar penetrates the connecting body,
In the step of coupling the pillar, the first main reinforcing bar is connected to the second main reinforcing bar, and a method for combining a precast concrete column and a steel beam with a precast concrete column. The method of claim 5,
A first insertion groove is formed at an upper end of the first pillar,
A second insertion groove is formed at a lower end of the second pillar,
The connecting body,
A pillar part inserted into the first insertion groove and the second insertion groove; And
It includes a beam extending from the pillar portion to the side, the steel beam is coupled,
The beam portion is a combination structure of a precast concrete column and a steel frame beam, characterized in that a plurality of through holes through which the plurality of first main reinforcing bars are respectively formed. The method of claim 6,
In the coupling step, a plurality of support nuts are interposed between the first concrete portion and the beam to support the beam,
Wherein the support nut, the coupling structure of the precast concrete column and the steel frame beam, characterized in that each screwed to the first main reinforcement to level the beam.

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