KR101178381B1 - Steel-concrete hybrid column using square shaped steel pipe and manufacturing method thereof - Google Patents

Abstract

The present invention is formed so that the two bent steel plate is combined to have a rectangular cross-section with a hollow cross-section, each corner is formed at regular intervals in the longitudinal direction is formed at right angles with respect to the longitudinal direction, a constant interval on the outer surface Square steel pipe is composed of a stud connector; The longest side is inserted into the coupling hole of the rectangular steel pipe in the shape of a right triangle, and is radially coupled, and consists of an internal reinforcement part located inside the center steel pipe and an external reinforcement part located outside the center steel pipe. The through hole is formed in the center of the part, the outer reinforcing portion is formed with a cutting surface on the right corner and the acute corners on both sides of the reinforcement plate is formed in the outer groove; The outer concrete is made of precast on the outside of the square steel pipe; consisting of, only the outer portion except the hollow portion of the square steel can be cast concrete to significantly reduce the weight of the precast concrete pillar, the hollow portion compared to the factory casting Significantly inexpensive cast-in-place concrete has a very useful effect with excellent economic efficiency. Also, by constructing a reinforcement plate to reinforce the square steel pipe, the thickness of the square steel pipe can be minimized, and the weight of the composite pillar can be further reduced, It is very useful for easy reinforcement of the band and the band.

Description

Precast concrete column using square steel pipe and its manufacturing method {Steel-Concrete Hybrid Column using square shaped steel pipe and manufacturing method}

The present invention relates to a precast concrete composite pillar using a square steel pipe and a method of manufacturing the same, and more particularly, to form a precast concrete on the outside of the square steel pipe formed by the combination of two thin bent steel sheets with a hollow inside The hollow part of the square steel pipe is made by pouring concrete in the field, which can greatly reduce the weight of the precast concrete column, and reinforce the square steel pipe by constructing a reinforcement plate at regular intervals in the square steel pipe, The present invention relates to a precast concrete composite column and a method of manufacturing the same using a square steel pipe which can minimize the thickness and further reduce the weight of the composite column, while easily reinforcing the main rod and the strip reinforcing bar.

As buildings become higher, structural systems must be able to support vertical loads as well as horizontal loads such as wind and earthquakes more efficiently. This requires a pillar member with a higher rate of strength increase compared to the increase rate of the cross section. In this regard, the use of composite columns can greatly increase the strength and deformation capacity without increasing the cross-section, resulting in highly efficient structures. In this factor, H-steel embedded composite pillars are widely used, and concrete filled steel pipe structures are attracting much attention, and in designing column members in high-rise structures, composite columns in which steel columns or steel members are reinforced with high-strength concrete ) Is often used because it can be sized appropriately to effectively use the interior space of the building.

In addition, precast concrete (hereinafter referred to as PC) pre-fabricated at the factory has advantages such as easy site management by on-site installation after manufacturing, and shortening of air and improvement of workability. However, in the process of installing the factory-made precast concrete members on site, it is necessary to carry out a preliminary review of transportation and lifting, and to plan the yard space for the precast concrete members brought into the site and the operation of tower crane or hydro crane. In addition, since the unit cost of the PC member is calculated by weight, the excessive weight is directly linked to the cost, and therefore, reducing the weight of the PC member is the most important for securing economic efficiency and competitiveness.

As a background technology of the present invention, there is a patent registration No. 0666703 "concrete composite pillar and synthetic piers" (Patent Document 1). In the background art, the steel pipe as shown in Figure 6; At least one attachment reinforcing material attached to the outer surface of the steel pipe in the longitudinal direction of the steel pipe; And concrete poured into a space formed by an outer circumferential surface of the steel pipe and the attachment reinforcement material, wherein the attachment reinforcement material is formed at a right angle to the binding plate at a central point of the binding plate, and a binding plate having a binding portion formed thereon. It proposes a concrete composite pillar comprising an abdomen having the above-described attachment hole, and an attachment protrusion formed by cutting the upper end of the abdomen and bending the cut end alternately in the direction.

However, the background art is a buried composite pillar, which merely serves to solidify the attachment of concrete and steel pipe to the outside of the steel pipe, and does not appear to reduce the weight of the composite pillar, and to reduce the load of the steel pipe itself. It was difficult and there was a problem that the reinforcement of the main column and the band reinforcement of the synthetic column.

Patent Registration No. 0666703 "Concrete composite pillar and composite piers"

The present invention is to solve the problems as described above, consisting of a combination of two thin bent steel sheet to form a factory made of precast concrete on the outside of the square steel pipe with a hollow formed therein, the hollow portion of the square steel pipe concrete in the field By casting to finish, the weight of the precast concrete columns can be greatly reduced, and by reinforcing the square steel pipes by constructing reinforcement plates at regular intervals on the square steel pipes, the thickness of the square steel pipes can be minimized without torsional deformation. The purpose of the present invention is to provide a precast concrete composite pillar using a square steel pipe that can reduce the weight of the composite pillar and can easily reinforce the main rod and the strip reinforcement.

The present invention is formed so that the two bent steel plate is combined to have a rectangular cross-section with a hollow cross-section, each corner is formed at regular intervals in the longitudinal direction is formed at right angles with respect to the longitudinal direction, a constant interval on the outer surface Square steel pipe is composed of a stud connector; The longest side is inserted into the coupling hole of the rectangular steel pipe in the shape of a right triangle, and is radially coupled, and consists of an internal reinforcement part located inside the center steel pipe and an external reinforcement part located outside the center steel pipe. The through hole is formed in the center of the part, the outer reinforcing portion is formed with a cutting surface on the right corner and the acute corners on both sides of the reinforcement plate is formed in the outer groove; It is to provide a precast concrete composite pillar using a square steel pipe, characterized in that consisting of; outer concrete is made of precast on the outside of the square steel pipe.

In addition, in the shape of a right triangle, the upper and lower ends of the rectangular steel pipe are radially coupled to each of the four corners of the corner, the cutting edge is formed on the right corner and the acute corners on both sides are formed with an arc-shaped groove on the outer side, hollow of the square steel pipe A panel zone reinforcing plate having a through hole formed at a portion thereof; The outer side of the panel zone reinforcing plate is coupled to the coupling steel plate is configured to protrude to the protruding line and the extension line; or further configured or in addition to the cross-section is formed in the L shape, the vertical surface of the outer periphery of the end of the square steel pipe The angle is coupled to the horizontal plane is coupled to close the end of the outer concrete, it can be configured to facilitate the coupling with the beam in all structures, such as reinforced concrete and steel structure.

In addition, the step of combining the two bent right angled bending steel sheet to form a hollow cross section to form a rectangular steel pipe; Cutting the corners of the slope at right angles to the longitudinal direction at regular intervals in the longitudinal direction of the square steel pipe to form a coupler, and coupling the stud connectors to the outer surface at regular intervals; Fitting a reinforcement plate to the coupling hole of the square steel pipe; Assembling the formwork and reinforcing the cast bar and the strip reinforcement to the outside of the square steel pipe; Forming concrete in the formwork to form an external concrete to be manufactured by precast; to provide a method of manufacturing a precast concrete composite pillar using a square steel pipe comprising a.

In addition, the composite column manufacturing method is to form an angle on the outer periphery of the end of the square steel pipe, and then cast concrete in the form to form an external concrete, and the panel zone reinforcement plate is radially on the four sides of the upper and lower ends of the square steel pipe, respectively. Combining; And combining the steel plate having a rectangular cross section so as to protrude from the rectangular steel pipe and the extension line on the outer surface of the panel zone reinforcing plate.

The present invention is made of a combination of two thin bent steel sheet formed by forming a precast concrete on the outside of the square steel pipe with a hollow formed inside, the hollow portion of the square steel pipe to cast concrete in the field, precast concrete The weight of the column can be greatly reduced, and by increasing the amount of concrete that is significantly inexpensive on-site casting compared to factory casting, there is a very useful effect with excellent economic efficiency.

In addition, by constructing a reinforcement plate at regular intervals in the square steel pipe and reinforcing the square steel pipe, it is possible to minimize the thickness of the square steel pipe while reinforcing vulnerabilities such as torsion that may occur when using a thin bent steel sheet through the reinforcement plate. While it can further reduce the weight of the main bar and strip reinforcement is easy to have a very useful effect.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
Figure 1a is a partially cutaway perspective view of an embodiment of a precast concrete composite pillar using a square steel pipe of the present invention,
Figure 1b is a partially cutaway perspective view of another embodiment of a precast concrete composite pillar using a square steel pipe of the present invention,
2A is a side cross-sectional view of FIG. 1A;
2B is a side cross-sectional view of FIG. 1B;
3 is a plan sectional view of a portion of the reinforcing plate 200 of FIG.
4A is a cross-sectional plan view of the panel zone portion of FIG. 1;
Figure 4b is a cross-sectional view showing another embodiment of the external concrete of Figure 4a,
5 is a manufacturing flowchart of the method for manufacturing a precast concrete composite pillar using a square steel pipe,
Figure 6 is a cross-sectional view showing a conventional concrete composite column.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

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

Figure 1a is a partially cutaway perspective view of an embodiment of a precast concrete composite pillar using a square steel pipe of the present invention.

As shown in Figure 1a, the precast concrete composite column (1) using the square steel pipe of the present invention is a square steel pipe (100) as a bent steel plate (100a) (100b) bending a steel plate thinner than a conventional steel pipe in the factory To form a precast concrete composite column (1) using a square steel pipe consisting of the outer concrete 500 made of precast concrete, the outside of the square steel pipe 100, and moved to the site after the internal concrete It is a composite column that improves economic efficiency by reducing the weight of the precast concrete composite column as much as possible by pouring it in.

The square steel pipe 100 is bent at a right angle to the thin steel sheet to form a bent steel plate, and the two bent steel plates (100a, 100b) are joined by welding to form a square cross section.

In general, synthetic columns include H-shaped steel embedded in concrete columns, coated with reinforcing bars and band reinforcing bars, and concrete-filled types made by filling concrete in round or square steel pipes, and filled-coated types combined with coated and concrete filled types.

The present invention forms a hollow inside to minimize the weight of the synthetic column and the outside is formed of precast concrete, it is possible to reliably distinguish between the external concrete 500 and the internal concrete formed by being poured inside the hollow 110 When using a round steel pipe, in order to satisfy the conditions of the embedded composite pillar, it is very difficult to reinforce the band reinforcing bar 30 and the band reinforcing bar 30 fixed therein. use. In addition, since the thickness is determined in the case of a ready-made square pillar or a circular column, it is difficult to reduce the weight of the square pillar or circular pillar to reduce the weight of the composite pillar, the present invention is thinner than the ready-made steel pipe so that the cross section is formed square Since the square steel pipe 100 formed by combining the bent steel sheets 100a and 100b bent at a right angle to the steel sheet is used, steel sheets having various thicknesses thinner than those of the conventional steel pipes can be bent and used. Therefore, by applying different thicknesses of the bent steel sheet (100a) (100b) to reduce the weight of the square steel pipe 100 can minimize the weight of the synthetic column (1) itself. Since the minimum steel thickness for installing the stud connector 130 is 6 mm (when ø16 is applied), when the bent steel plates 100a and 100b are configured to be 16 mm or more, the thicknesses of the bent steel plates 100a and 100b are differently applied. can do.

Since the hollow 110 combines the bent steel plate 10 bent at right angles to produce a square steel tube 100, the square steel tube 100 has a rectangular cross section and a rectangular hollow 110 is formed therein. The hollow 110 is manufactured by pouring the external concrete 500 produced by precast on the outside of the square steel pipe 100 and then moved to the site to form concrete in the hollow 110 at the site to form internal concrete. Precast concrete composite pillar (1) using the square steel pipe of the present invention is clearly distinguished from the hollow 110 and the outside of the center around the square steel pipe (100). The outer concrete 500, which is manufactured by precast on the outside of the square steel pipe 100, is cast in advance in a factory, and the internal concrete that is poured into the hollow 110 of the square steel pipe 100 is poured after moving to the site. Since internal concrete is cast in the field, high strength concrete can be applied. In general, high-strength concrete exceeding 50MPa should establish a separate anti-thermal protection measures, the present invention has the advantage that does not need to establish a separate anti-thermal protection measures because the external concrete 500 corresponds to the general concrete.

The coupling sphere 120 is formed at regular intervals in the longitudinal direction at the corners of each slope of the square steel pipe 100, the longitudinal direction of the square steel pipe 100 in the shape as if cut the edge of each slope of the square steel pipe 100 with a knife. It is formed at right angles to. The reinforcing plate 200 is fitted into each of the coupling holes 120 of the four corners of the square steel pipe 100.

The stud connector 130 is welded to the outer surface of the square steel pipe 100 by a plurality of joints at certain intervals. The external concrete 500 and the square steel tube 100 are hardened by the stud connector 130 to firmly adhere to each other so that the outer concrete 500 and the square steel tube 100 work together to maximize the synthetic action as a composite column. Since it has an effect, it increases the overall rigidity of the column, thereby reducing the size of the member is advantageous in terms of space utilization.

FIG. 2A is a side cross-sectional view of a precast concrete composite pillar using a square steel pipe, and FIG. 3 is a plan cross-sectional view of a portion of the reinforcing plate 200 of FIG. 1A.

As shown in Figures 1 to 3, the reinforcement plate 200 is a rectangular triangle shape, the longest side is fitted into each of the four coupling holes 120 of the square steel pipe 100 is radially coupled to the overall square steel pipe (100) Reinforce the edges of). The reinforcing plate 200 is coupled to penetrate vertically with respect to the longitudinal direction of the square steel pipe 100 in order to further reinforce the corners of the square steel pipe 100.

Square steel pipe 100 is composed of two bending steel plates (100a) (100b), bending steel plates (100a) (100b) can be used to reduce the thickness of the composite column of thin steel sheet (100a) (100b) And, it is to reinforce through the reinforcing plate 200, such as torsional weakness that may occur when using a thin thickness of the bent steel sheet (100a, 100b). Therefore, by applying different thicknesses of the bent steel sheet (100a) (100b) to reduce the weight of the square steel pipe 100 is to reinforce using the reinforcement plate 200 to minimize the weight of the synthetic column (1) itself.

The shape of the reinforcement plate 200 has a shape of a right triangle as a whole, the reinforcement plate 200 is coupled to the square steel pipe 100, the internal reinforcement portion 210 located inside the square steel pipe 100 And is divided into an outer reinforcing portion 220 which is located outside the center of the square steel pipe (100). It is introduced into the coupling hole 120 of the square steel pipe 100, the longest side of the reinforcement plate 200 when the fixed coupling is introduced into the hollow 110 of the square steel pipe 100, the internal reinforcement portion 210 is The longest sides of the four reinforcing plates 200 are formed to face each other to form a space portion in the center portion, wherein the internal reinforcing portion 210 is formed in such a way that the longest side is drawn into the corner side of the square steel pipe 100. It is configured so that the space formed between the longest side of the inner reinforcing portion 210 of the four reinforcing plate 200 as wide as possible, so that the hollow 110 of the square steel pipe 100 is continuous without disconnection, the interior The reinforcement part 210 may form a through hole 211 to serve as a shear connector of the inner concrete that is configured inside the square steel pipe 100.

The external reinforcing portion 220 is supported on both sides of the corner of the square steel pipe 100 is no longer drawn into the inside of the square steel pipe 100, the role is supported, and configured in a shape protruding to the side from the square steel pipe (100) do. The outer reinforcement portion 220 is acute corner portion is cut off to abut the acute corner portion of the outer reinforcement portion 220 of the other reinforcement plate 200 adjacent to each other at the center of one side of the square steel pipe (100).

In addition, the outer reinforcing portion 220 of the reinforcing plate 200 has a cutting surface 221 is formed at the right corner and the acute corners on both sides can be configured to have an arc-shaped groove 222 on the outer side.

This is when the external concrete 500 is formed on the outside of the square steel pipe 100, the external concrete 500 is squeezed inside to satisfy the conditions of the embedded composite pillar of the current building structural standards and commentary (KBC 2009) Since it is necessary to reinforce the band reinforcing bar 30 fixing the 20 and the main bar, the main bar 20 arranged in the longitudinal direction on the outer side of the square steel pipe 100 is continuously disposed without being disturbed by the reinforcing plate 200. To make it possible. That is, the cutting surface 221 and the arc-shaped groove 222 is configured by cutting or reinforcing the reinforcing plate 200 in the portion where the main root 20 penetrates. The cutting surface 221 is formed by cutting a right angled corner of the reinforcing plate 200 and allows the main root to penetrate the cut portion. In addition, the arc groove 222 is formed by forming an arc-shaped groove on the outer surface of the acute corner portion of the reinforcing plate 200, and because the acute corners of the different reinforcing plate 200 abut each other, The size of the 222 may be such that the two arc-shaped grooves 222 are combined to form the required size when penetrating one main root 20.

As described above, the outer concrete 500 to the outside of the square steel pipe 100 is produced by precast.

The thickness of the external concrete 500 cast in the factory is approximately 100 ~ 120mm. When the minimum size of the precast composite column is 600 × 600 mm and the thickness of the outer concrete 500 is 100 mm, the area ratio of the inner hollow 110 to the entire cross section becomes about 45%. When the composite pillar size is 1,000 × 1,000 mm and the external concrete 500 thickness is 100 mm, the area ratio of the inner hollow 110 to the entire cross section is about 64%. Therefore, the hollow ratio is about 45 ~ 65% of the total pillar area, which makes the weight lighter, so it is possible to secure economic feasibility.

4A is a cross-sectional view of a portion of the reinforcing plate 200 of the precast concrete composite pillar using the square steel pipe, and FIG. 4B is a cross-sectional view showing another embodiment of the external concrete of FIG. 4A.

As shown in FIGS. 4A and 4B, the outer concrete 500 may be formed in a square or a circular shape to be formed as a prismatic pillar or a circular pillar, regardless of the shape of the square or circular outer concrete 500. The same square steel pipe 100 can be used.

2 and 4a, the square steel pipe 100 of the precast concrete composite column 1 using the square steel pipe is further used for easy coupling between the column and the beam joint, that is, the beam in the panel zone. The panel zone reinforcement plate 300 and the panel zone reinforcement plate 300 are configured to be radially coupled to the upper and lower ends of the rectangular steel pipe 100 in the shape of a right triangle at both ends in the longitudinal direction of the radially coupled to the four surface edges, respectively. Combination steel sheet 400 may be configured to protrude from the square steel pipe 100 and the extension line on the outer side of the.

Panel zone reinforcement plate 300 is a rectangular triangular shape, the upper and lower ends of the rectangular steel pipe 100 is configured to be radially coupled to each of the four surface edges, the cutting edge 310 is formed on the right corner and the acute corners of both sides Arc-shaped groove 320 is configured on the outer side, the through-hole 330 is formed in the portion located in the hollow 110 of the square steel pipe (100).

The longest side of the panel zone reinforcement plate 300 is coupled to each corner of the upper and lower ends of the square steel pipe 100 so that the four panel zone reinforcement plates 300 form a radial shape. The panel zone reinforcement plate 300 forming a radial shape is hollowed out with four different long sides, so that the hollow 110 of the square steel pipe 100 is not disconnected and is connected through the opening so that concrete can be poured when the internal concrete is poured. It can be filled smoothly, which facilitates concrete pouring work. The panel zone reinforcement plate 300 has the longest side formed at the inner position with respect to the square steel pipe 100, and the side of the panel zone reinforcement plate 300 is projected to the outside with respect to the square steel pipe 100. Are combined. A through hole 330 may be formed to serve as a shear connector of the inner concrete that is configured inside the square steel pipe 100.

An acute corner portion of the panel zone reinforcement plate 300 is cut to abut the acute corner portion of the other panel zone reinforcement plate 300 adjacent to each other at the central portion of one side of the square steel pipe 100.

In order to be able to be arranged continuously without being disturbed by the panel zone reinforcing plate 300, the main root 20 is disposed in the longitudinal direction when manufacturing the outer concrete 500 on the outside of the square steel pipe 100, the main root 20 ) To cut through the panel zone reinforcement plate 300 or to form a groove to form a cutting surface 310 and the arc-shaped groove 320. The cutting surface 310 is formed by cutting a right angled edge of the panel zone reinforcing plate 300 and allows the main root to penetrate the cut portion. In addition, the arc groove 320 is configured by forming the outer surface of the acute corner of the panel zone reinforcement plate 300 to form an arc-shaped groove, because the acute corners of the different panel zone reinforcement plate 300 abut each other The size of the arc-shaped groove 320 may be such that the two arc-shaped grooves 320 are combined to form a required size when penetrating one main root 20.

Panel zone reinforcing plate 300 is configured to correspond to the position of the flange of the cheolgolbo is coupled to the flange of the cheolgolbo by a method such as welding. When the flange thickness of the steel ball is relatively larger than the thickness of the square steel pipe 100, since excessive tensile stress may occur in the thickness direction on the surface of the steel pipe contacting the beam, the thickness of the flange of the steel ball is equal to or thicker. It is preferable.

The reinforcing plate 200 and the panel zone reinforcing plate 300 as a whole have a shape of a right triangle, but may protrude or be recessed to the outside of the shape of the right angle and the shape of the diagonal line, and may be variably formed.

Coupling steel plate 400 is configured to be coupled to the panel zone reinforcing plate 300, it is configured to protrude to the extension line of the square steel plate 100 in the same square cross-section with the square steel pipe (100). Coupling steel plate 400 is configured in the extension line corresponding to the square steel pipe 100 to form a cross-section to facilitate the coupling of the beam in any direction of the slope.

Figure 1b is a partially cutaway perspective view of another embodiment of a precast concrete composite pillar using a square steel pipe of the present invention.

As described above, the panel zone reinforcement plate 300 and the coupling steel plate 400 may be configured at both ends of the square steel pipe 100, but as shown in FIG. 1B, by extending both ends of the square steel pipe 100. A panel zone portion 140 is formed, and a coupling hole 120a is formed in which corners between the end of the square steel pipe 100 and the panel zone portion 140 are cut at right angles to the longitudinal direction, thereby forming a panel zone reinforcement plate 300. ) Can be stably fitted to the coupling sphere (120a), it may be coupled to the coupling steel plate 400 to the panel zone portion 140, the square steel pipe 100 is extended. As such, when the panel zone portion 140 is formed and the coupling steel sheet 400 is formed, the coupling sphere 120a can be formed, so that the panel zone reinforcing plate 300 can be easily coupled, and the coupling steel sheet 400 is coupled. The panel zone reinforcement plate 300 as well as the panel zone 140 is coupled to the position selection and coupling is more robust.

Panel zone reinforcement plate 300 is coupled to the flange of the beam, the coupling steel plate 400 is to be coupled to the web of the beam, generally the beam to be bonded to the PC column is limited to PC beam or reinforced concrete beam of the same structural type In contrast, since the precast concrete composite column 1 using the square steel pipe of the present invention can join a steel beam using the panel zone reinforcement plate 300 and the joining steel sheet 400, the reinforced concrete and the steel structure, etc. Applicable in all structures.

In addition, as shown in FIG. 2, the angle 40 may be coupled to an outer circumference of the end of the square steel tube 100.

Angle 40 is formed in the cross-section L-shaped, the vertical surface is coupled to the outer periphery of the outer periphery of the end of the square steel pipe 100 and the horizontal surface is coupled to close the end of the outer concrete 500. The angle 40 may facilitate the coupling with the cheolgolbo as well as the end protection function of the external concrete 500 at the same time.

At this time, the angle 40 configured at the lower end is to be coupled to be spaced apart by the thickness of the slab at the lower end of the square steel pipe 100, the slab concrete at the time of later slab casting angle 40 is configured at the lower end of the square steel pipe 100 To the bottom of the

5 is a manufacturing flowchart of the method for manufacturing a precast concrete composite column using a square steel pipe.

Referring to Figure 5 described in detail the manufacturing method of precast concrete composite column using a square steel pipe of the present invention.

As shown in FIG. 5A, first, a square steel pipe 100 is formed of the bent steel plates 100a and 100b.

Bending the steel sheet to make two bent steel plate (100a) (100b), and the two bent steel plate (100a) (100b) are placed to face each other so as to form a rectangular hollow 110 therein and weld both ends of the side. When the bent steel plates 100a and 100b are coupled, the two different bent steel plates 100a and 100b are slightly shifted so that the end portions of the side surfaces are protruded without being completely engaged to facilitate the welding operation.

Then, as shown in Figure 5b, to form a coupler 120 and couple the stud connector 130.

Coupling member 120 is formed by cutting the corners of the slope at a right angle to the longitudinal direction at regular intervals in the longitudinal direction of the square steel pipe (100). That is, the coupling sphere 120 is the shape of both sides cut at the corners of the corner of the square steel pipe 100 or the end of each coupling sphere 120 formed in the corner of the slope do not contact each other, the square steel pipe 100 is It is a shape which is not fully cut | disconnected but only the center part of 4 surfaces of the square steel pipe 100 is connected.

The stud connector 130 is welded to the outer surface of the square steel pipe 100 at regular intervals to couple.

As shown in FIG. 5C, the reinforcing plate 200 is fitted to the coupler 120. The reinforcement plate 200 has a shape of a right triangle and the longest side is fitted into each of the four coupling holes 120 of the square steel pipe 100, and the shape of the reinforcement plate 200 has a shape of a right triangle as a whole. 200 is coupled to the square steel pipe 100, the inner reinforcing portion 210 and the inner reinforcing portion located in the center around the square steel pipe 100 and the outer reinforcing portion 220 located outside the center (100) Are divided into The outer circumference formed with the reinforcement grooves 120 of the square steel pipe 100 is formed so that the outer reinforcing parts 220 of the four different reinforcing plates 200 protrude in a L-shape so that the ends abut each other. The reinforcement groove 120 is formed to protrude from the outer circumference formed. The internal reinforcing portion 210 of the four different reinforcing plate 200 is located in the hollow portion 110 of the square steel pipe 100 to form a hollow consisting of the longest side.

As described above, the reinforcing plate 200 is inserted into the coupling hole 120 of the square steel plate 100 and then completely coupled to the square steel pipe 100 by a welding method.

As shown in FIG. 5D, after the reinforcing plate 200 is coupled to the square steel pipe 100, the outer concrete 500 is formed on the outside of the square steel pipe 100 to the outside of the square steel pipe 100. The main bar 20 and strip reinforcement (30) is arranged to assemble the formwork. The main root 20 is arranged in the longitudinal direction of the outside of the square steel pipe 100, and is configured to penetrate through the outer portion and the arc-shaped groove 222 of the cutting surface 221 of the reinforcement plate 200. At the same time as the reinforcement of the main bar 20, the strip reinforcement 30 is arranged at regular intervals around the main bar 20.

Thereafter, as shown in FIG. 5E, the external concrete 500 is formed on the outside of the square steel tube 100 to be completed.

Concrete is poured into the formwork to form an external concrete 500 that is made of precast.

In addition, in the step of assembling the formwork at the time of forming the external concrete 500, the cross section is formed in the L shape, the vertical surface is coupled to the outer periphery of the end of the end of the square steel pipe 100 and the horizontal surface is the end of the outer concrete 500 After the angle 40 is configured to be closed, concrete is placed in the formwork to form an external concrete 500, and panel zone reinforcement plates 300 are formed at both ends of the square steel pipe 100 at upper and lower ends of the square steel pipe 100. Combining radially to each of the four corners, and the coupling to form a coupling steel plate 400 having a rectangular cross section protruding from the rectangular steel pipe 100 and the extension line on the outer surface of the panel zone reinforcement plate 300 In addition, the panel zone reinforcement plate 300 is coupled to the flange of the beam, the coupling steel plate 400 is to be coupled to the web of the beam, the PC beam or reinforced concrete beam of the same structural type in general, the beam bonded to the PC column on In contrast, the precast concrete composite column (1) using the square steel pipe of the present invention can be used to join the steel beam using the panel zone reinforcement plate 300 and the coupling steel plate 400, reinforced concrete and steel structure It can be applied to all the structures.

Panel zone reinforcement plate 300 is configured to be coupled to both ends of the longitudinal direction of the square steel pipe 100, the outer end is located on the same line as the end of the outer reinforcing portion 220 of the reinforcing plate 200. The panel zone reinforcement plate 300 has a right triangle shape and when coupled to both ends of the square steel pipe 100, four different panel zone reinforcement plates 300 are identical to the reinforcement plate 200 of the square steel pipe 100. Join radially to the part corresponding to the edge of the slope. The hollow consisting of the longest side of the four different panel panel reinforcement plate 300 is formed.

In addition, as shown in Figure 5b (b), in the step of forming the square steel pipe 100, both ends of the square steel pipe 100 is extended to form a panel zone portion 140, the end of the square steel pipe 100 And the coupling holes 120a cut at right angles to the longitudinal direction between the edges of the panel zone 140 and the panel zone 140, and the reinforcing plate 200 is fitted to the coupling holes 120 of the square steel pipe 100. In the step, the panel zone reinforcing plate 300 is coupled to the coupler 120a, the coupling steel plate 400 may be coupled to the outer surface of the panel zone portion 140.

Coupling sphere (120a) is formed by cutting the corners of the slope between the rectangular steel pipe 100 and the panel zone portion 140 formed by extending the square steel pipe 100 at a right angle to the longitudinal direction. That is, the coupling sphere (120a) is the shape of both sides cut at the corners of the edge of the slope or the end of each coupling sphere 120 formed on the edge of the slope do not contact each other, the square steel pipe 100 is not completely cut, Only the central portion of the four sides of the square steel pipe 100 is connected.

That is, although the panel zone reinforcement plate 300 and the coupling steel plate 400 may be configured at both ends of the square steel pipe 100, the panel zone 140 is formed by extending both ends of the square steel pipe 100. Coupling spheres (120a) formed by cutting each corner between the end of the steel pipe 100 and the panel zone portion 140 at right angles to the longitudinal direction is formed, the panel zone reinforcing plate 300 is stably connected to the coupling sphere (120a) The fitting steel plate 100 may be coupled, and the coupling steel plate 400 may be coupled to the panel zone portion 140 in which the square steel pipe 100 extends.

Precast concrete composite pillar (1) using the square steel pipe of the present invention is clearly distinguished from the inside and the outside on the boundary of the square steel pipe (100). In general, high-strength concrete exceeding 50MPa should establish a separate anti-thermal protection measures, the present invention has the advantage that does not need to establish a separate anti-thermal protection measures because the external concrete 500 corresponds to the general concrete.

Precast concrete composite pillar (1) using the square steel pipe of the present invention configured as described above is configured to the outside of the square steel pipe 100 in the factory made of precast concrete in the factory, and then moved to the site Therefore, high-intensity concrete can be applied because internal concrete can be poured on site.

The internal concrete is manufactured by field casting in the hollow 110 of the square steel pipe 100. As described above, the outer concrete 500 of the minimum thickness is poured into the factory, and the concrete 110 is poured into the hollow 110 to form the inner concrete. In general, the unit price of concrete is about 10 times higher than that of cast concrete in the case of PC members. Therefore, minimizing the external concrete (500) manufactured by the factory and increasing the amount of internal concrete to cast the site will increase the economic efficiency. Can be.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

1: Precast concrete composite pillar using square steel pipe
20: freckles
30: strip rebar
40: angle
100: square steel pipe
100a, 100b: bending steel sheet
110: hollow
120: coupling sphere
130: stud connector
200: reinforcement plate
210: internal reinforcement unit
220: external reinforcement unit
300: Panel zone reinforcement plate
400: bonded steel sheet
500: External concrete

Claims (7)

Two bent steel plates (100a) (100b) are combined to have a cross-section is formed to have a rectangular shape with a hollow 110, each corner at a regular interval in the longitudinal direction is cut at right angles to the longitudinal direction coupling member 120 Is formed, the outer surface is a square steel pipe 100 is configured with a stud connector 130 at a predetermined interval;
Longitudinal sides are fitted into the coupling sphere 120 of the square steel pipe 100 in the shape of a right triangle, and are radially coupled to each other so that the inner reinforcement part 210 and the square steel pipe 100 positioned inside the square steel pipe 100. Consists of the outer reinforcing portion 220 which is located outside the center, the through-hole 211 is formed in the central portion of the inner reinforcing portion 210, the outer reinforcing portion 220 is a cut-out surface 221 at a right corner. It is formed and the acute corners on both sides of the reinforcement plate 200 is configured with an arc-shaped groove 222 on the outer side;
Precast concrete composite pillar using a square steel pipe, characterized in that consisting of ;; the outer concrete 500 is made of precast on the outside of the square steel pipe (100). The method of claim 1,
In the shape of a right triangle, the outer edges of the upper and lower ends of the square steel pipe 100 are radially protruded to the outer surface of the square steel pipe 100, respectively, and the inner end hollow portion 110 of the square steel pipe 100. It is configured to be coupled to, the cutting edge 310 is formed on the right corner and the acute corners on both sides is formed with an arc-shaped groove 320 on the outer side, through the hole located in the hollow 110 of the square steel pipe 100 Panel zone reinforcement plate 300 is formed;
Precast concrete using a square steel pipe, characterized in that further comprises; coupled steel plate 400 is configured to be configured to protrude to the square steel pipe 100 and the extension line on the outer surface of the panel zone reinforcing plate 300 Composite column. The method of claim 1,
Both ends of the square steel pipe 100 is extended to form a panel zone portion 140, each corner between the end of the square steel pipe 100 and the panel zone portion 140 is cut at right angles to the longitudinal direction (120a) ) Is formed,
The longest side is fitted into the coupling sphere 120a of the square steel pipe 100 in the shape of a right triangle, and is radially coupled so that the outer end protrudes to the outer side of the square steel pipe 100 and the inner end hollow of the square steel pipe 100. Combination is configured to be located in the part 110, the cutting surface 310 is formed in the right corner and the acute corners on both sides are formed in the outer side arc-shaped groove 320, the hollow 110 of the square steel pipe 100 Panel zone reinforcement plate 300 is formed in the through hole 330 is coupled to,
Precast concrete composite pillar using a square steel pipe, characterized in that the coupling steel plate 400 is coupled to the outer surface of the panel zone portion 140. 4. The method according to any one of claims 1 to 3,
The cross section is formed in the L shape, the vertical surface is coupled to the outer periphery of the both ends of the square steel pipe 100 and the horizontal surface is further configured to be coupled to close the end of the outer concrete 500, the bottom portion is configured Angle 40 is a precast concrete composite pillar using a square steel pipe, characterized in that coupled to be spaced apart by the thickness of the slab at the lower end of the square steel pipe (100). Combining two orthogonally bent steel plates (100a) (100b) to form a hollow (110) having a rectangular cross section to form a square steel pipe (100);
Combining the stud connector 130 at regular intervals by cutting the corners of the slope at right angles with respect to the longitudinal direction at regular intervals in the longitudinal direction of the square steel pipe 100, and on the outer surface at regular intervals;
Longitudinal sides are fitted into the coupling sphere 120 of the square steel pipe 100 in the shape of a right triangle, and are radially coupled to each other so that the inner reinforcement part 210 and the square steel pipe 100 positioned inside the square steel pipe 100. Consists of the outer reinforcing portion 220 which is located outside the center, the through-hole 211 is formed in the central portion of the inner reinforcing portion 210, the outer reinforcing portion 220 is a cut-out surface 221 at a right corner. Formed and acute angled corners of both sides by fitting the reinforcing plate 200, the arc-shaped groove 222 is formed on the outer side fitting to the coupling hole 120 of the square steel pipe (100);
Arranging the main rod 20 and the band reinforcing bar 30 on the outside of the square steel pipe 100 and assembling formwork;
Precast concrete composite pillar manufacturing method using a square steel pipe, characterized in that it comprises a; forming the concrete in the formwork to form the outer concrete (500) made of precast. 6. The method of claim 5,
In the step of assembling the form, the cross section is formed in the L shape, the angle 40 is coupled to the vertical plane is coupled to the outer periphery of both ends of the square steel pipe 100 and the horizontal plane is closed to close the end of the outer concrete 500 Consisting of the angle 40 is configured at the lower end is spaced apart by the thickness of the slab at the lower end of the square steel pipe 100, and then poured concrete into the formwork to form the external concrete 500, right angle in the shape of a right triangle The cut zone 310 is formed at the corner, and the acute corners on both sides are formed with the arc-shaped groove 320 on the outer side, and the panel zone in which the through hole 330 is formed at the portion located in the hollow 110 of the square steel pipe 100. Radially coupling the reinforcing plate 300 to four edges of the upper and lower ends of the square steel pipe 100, respectively; Coupling is configured to protrude to the square steel pipe 100 and the extension line on the outer surface of the panel zone reinforcing plate 300, the cross section is a rectangular cross section; Method of manufacturing precast concrete composite columns using 6. The method of claim 5,
In the forming of the square steel pipe 100, both ends of the square steel pipe 100 extend to form the panel zone 140, and each corner between the end of the square steel pipe 100 and the panel zone 140 is long. Coupling sphere (120a) is cut at right angles to the direction is formed,
In the step of assembling the form, the cross section is formed in the L shape, the angle 40 is coupled to the vertical surface is coupled to the outer periphery of both ends of the square steel pipe 100 and the horizontal surface to close the end of the outer concrete 500 It is composed, but the angle 40 is configured at the bottom portion is bonded by spaced apart by the thickness of the slab at the lower end of the square steel pipe 100, and then cast concrete in the formwork to form an external concrete 500,
In the step of coupling the reinforcing plate 200 to the coupling hole 120 of the square steel pipe 100, the longest side is fitted into the coupling sphere 120a of the square steel pipe 100 in the shape of a right triangle, respectively, coupled radially. The outer end portion is protruded to the outer surface of the square steel pipe 100 and the inner end is configured to be located in the hollow portion 110 of the square steel pipe 100, the cut surface 310 is formed at a right corner and acute angles of both sides The corner is formed with an arc-shaped groove 320 on the outer side, the panel zone reinforcing plate 300 is formed in the through hole 330 is formed in the portion located in the hollow 110 of the square steel pipe 100, the panel zone portion ( Step of combining the coupling steel plate 400 on the outer surface of the 140; Precast concrete composite pillar manufacturing method using a square steel pipe, characterized in that the addition.

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