KR20100043731A - Precast concrete column using steel material and precast reinforced concrete construction using the same - Google Patents

Abstract

PURPOSE: A precast concrete column using a steel material, and a precast reinforced concrete structure are provided to improve structural stability by integrally forming the precast concrete column and a precast concrete beam. CONSTITUTION: A precast concrete column(50) using a steel material comprises a concrete main body(10), multiple reinforcing bars(20), and a joint unit(30). The concrete main body is vertically formed. The reinforcing bars are embedded in the concrete main body in a longitudinal direction. The joint unit is formed between an upper body(11) and a lower body(12) of the concrete main body. The joint unit has a support member and multiple joint members(36). An exposure joint is formed in the support member, and is coupled to the joint members.

Description

Precast concrete column using steel material and Precast reinforced concrete construction using the same}

The present invention relates to a building structure and a building member used in the building structure, and more particularly, using precast concrete columns and precast concrete columns pre-fabricated in factories, etc. as vertical structural members and precast concrete beams as horizontal structural members The present invention relates to a precast reinforced concrete structure which is constructed in an assembled form using the same.

Recently, in the field of construction, the major structural members such as columns and beams, which are vertical structures, have been separated from conventional methods based on the existing wet concrete site casting method from the viewpoint of shortening the air and improving economic feasibility by improving construction productivity. In the absence of construction, it is ready-made in factories and the like, and in the field, a method of assembling them and building a building is used. The use of such a method increases the efficiency of construction, and the effects of ease of quality control and manpower reduction. Recently, various methods of assembly have been developed.

In such a prefabricated method, a structure using steel frame is most widely used, and recently, a so-called precast reinforced concrete method is also applied as a reinforced concrete structure. In the precast reinforced concrete structure, both columns, which are vertical structural members, and beams, which are horizontal structural members, are used as precast reinforced concrete manufactured at the factory, and they are constructed as a unit by combining them as unit members to form a structure.

As described above, in the case of the precast reinforced concrete method, by using the prefabricated member, the quality of the precast reinforced concrete method is superior to the member manufactured by the in situ casting method, and the curing period is drastically reduced by minimizing the in situ casting of the wet concrete. In spite of many advantages such as shortening the air, the present method is limitedly applied.

This is because the joint structure of the pillar and beam, which is most important in the precast reinforced concrete method, in particular, the joint structure in which the pillar and the beam are integrated into one is not sufficiently secured. In other words, the beam, which is a horizontal member, performs the role of transferring the load to the pillar, which is a vertical member, and the beam and the column must be very firmly coupled. However, the conventional joining structure does not guarantee sufficient stability by connecting the pillars and beams by vertically bending the reinforcing bars embedded in the precast concrete beams and connecting them to the precast concrete columns and placing concrete on the joints. In addition, the splice joint reduces the ease of construction, the precast reinforced concrete method is a limited application as a whole.

The present invention is to solve the above problems, to provide a precast reinforced concrete structure with improved structure so that the pillar and the beam can be firmly coupled while forming an integral.

In addition, another object of the present invention to provide a precast concrete pillar as a unit member for ensuring the construction usability and stability of the precast reinforced concrete structure as described above.

The precast reinforced concrete structure according to the present invention for achieving the above object uses a precast concrete column as a vertical structural member, and uses a precast concrete beam as a horizontal structural member.

The precast concrete pillar according to the present invention includes a concrete body which is formed in a vertical direction and a plurality of reinforcing bars embedded in a length direction in the interior of the concrete body, and is made as a ready-made, the length of the concrete body And a supporting member having an exposed joint formed in the concrete body in the state coupled to the plurality of rebars, the central portion being exposed to the outside, formed in a direction, and coupled to the plurality of rebars, in a horizontal direction. It characterized in that it comprises a joining unit having a plurality of joint members coupled to the exposed joint of the support member to be interconnected with the formed precast concrete beam.

In addition, the precast concrete beam which is a horizontal structural member employed in the precast reinforced concrete structure according to the present invention is provided with a concrete body formed long in the horizontal direction, and a plurality of reinforcement embedded in the longitudinal direction inside the concrete body And, as a ready-made, the end of the concrete body is formed with a receiving portion that can be filled with concrete to be cast in the field, one end is installed in the receiving portion of the concrete body in a state coupled to the plurality of reinforcing bars, the other end It is characterized in that it further comprises a junction body interconnected with the precast concrete pillar formed in the vertical direction is formed with a protrusion disposed to project relative to the concrete body.

In the precast reinforced concrete structures using the precast concrete columns and the precast concrete beams according to the present invention as the vertical structural members and the horizontal structural members, respectively, a rigid connection is performed between the joints and the joints embedded in the beams and the columns. At the same time, the stability of the structure is improved by improving the integrity of the beams and columns by casting the concrete in the area connected to the beams and columns, including the direct connection of the beams and columns.

In one embodiment of the present invention by using a high toughness cement composite as the site-poured concrete to improve the tensile performance to prevent brittle fracture of the joint portion to further improve the stability of the structure.

In addition, the embodiment of the present invention has the advantage that it is possible to reduce the air to improve the stability and at the same time the workability of the structure.

Hereinafter, with reference to the accompanying drawings, a precast reinforced concrete structure using a precast concrete pillar and a precast concrete beam according to a preferred embodiment of the present invention will be described in more detail.

1 is a schematic perspective view of a precast reinforced concrete structure employing a precast concrete column and a precast concrete beam according to a preferred embodiment of the present invention, Figure 2 is a joining unit of the precast concrete column shown in FIG. 3 is a schematic perspective view, and FIG. 3 is a schematic perspective view of the joined body employed in the precast concrete beam shown in FIG. 1.

1 to 3, the precast reinforced concrete structure 100 according to a preferred embodiment of the present invention is a precast concrete column 50 is used as a vertical structural member, a precast concrete beam (a horizontal structural member) 90) to form the frame of the structure.

The precast concrete pillars 50 employed in the precast reinforced concrete structure 100 according to the present invention are not manufactured by pouring and curing wet concrete at the site of constructing the structure, and are manufactured as a ready-made in a factory, etc. 10), a plurality of reinforcing bar 20 and the bonding unit 30 is provided.

Since the concrete body 10 is used as a pillar member, the concrete body 10 is formed to have a long length in a vertical direction, and is manufactured to have a cross-sectional shape of approximately four angles. A plurality of reinforcing bars 20 are embedded in the concrete body 10. Reinforcing bar 20 is also formed long along the vertical direction, as in the concrete body 10, the number of arrangement of the reinforcement is to vary depending on the design load, in this embodiment 12 arrangement along the circumferential direction of the concrete body 10 do.

In addition, in the present embodiment, one precast concrete column 50 forms a structure of a so-called two-layer section in which two layers are disposed, and a slab (not shown) is formed at the middle of the precast concrete column 50. do. Accordingly, the concrete body 10 is also divided into the upper body 11 and the lower body 12, a plurality of reinforcing bar 20 in the state that the concrete is not filled between the upper body 11 and the lower body 12 A portion formed to be connected to each other is formed, and a slab (not shown) is formed between the upper body 11 and the lower body 12.

The bonding unit 30 as shown in FIG. 2 is coupled between the upper body 11 and the lower body 12 of the concrete body 10. The joining unit 30 is made of steel as a member used for joining the precast concrete beam 90 which is a horizontal structural member to be described later, and includes a supporting member 31 and a plurality of joint members 36. .

The support member 31 is elongated in the longitudinal direction of the concrete body 10, that is, in the vertical direction, the upper end of which is embedded in the upper body 11 of the concrete body 10, and the lower end of the concrete body 10. It is embedded in the lower body 12 and fixed. When the upper end and the lower end of the support member 31 are embedded in the concrete body 10, the central portion of the support member 31 is disposed between the upper body 11 and the lower body 12 in the concrete body 10. Exposed to the outside, this portion forms the exposed joint 32 of the support member (31).

In the present embodiment, the support member 31 is formed in a hollow hollow shape in the shape of a square pillar. An injection hole 33 is formed in the exposed joint 32 of the support member 31 to allow concrete to be cast in-situ into the support member 31. In this embodiment, the injection hole 33 is formed on all four outer surfaces of the support member 31.

Cover 34 is coupled to the top and bottom of the support member 31, respectively. The cover 34 is formed in a plate shape and is formed to have a width wider than that of the support member 31 so that both sides protrude from the outer surface of the support member 31. As shown in FIG. 5, a plurality of rebars 20 embedded in the concrete body 10 are welded and coupled to both protruding ends of the cover 34. In addition, the opening 34 is formed in the cover 34 through the cover 34 for communicating the inside and the outside of the support member 31.

As will be described in detail later, when the primary coupling between the precast concrete pillars 50 and the precast concrete beams 90 is completed, the concrete is poured on the inside of the support member 31 at the construction site. The concrete filled inside the 31 is connected to the upper body 11 and the lower body 12 of the concrete body 10 through the opening 35 provided in the upper and lower cover 34 of the support member 31 to be integrated. Can improve the sex. The integrity of the pillars and beams in the precast reinforced concrete structure 100 according to the present invention will be described later.

The joint member 36 is a portion to which the precast concrete beam 90 to be described later is coupled and coupled to the exposed joint 32 of the support member 31. The joint member 36 is formed in a substantially 'c' shape, and has a pair of connection parts 37 spaced apart from each other, a pair of connection parts 37, and a pair of intermediate parts 41. .

Since the pair of connection parts 37 facing each other are formed long along the horizontal direction, a space is also formed along the horizontal direction between the pair of connection parts 37, which are precast concrete beams 90 to be described later. The insertion part 39 into which the joined body 80 is fitted is formed. The pair of connecting parts 37 are interconnected by the fixing part 38. Through-holes (h) are formed in the pair of connection portions 37, respectively, at positions corresponding to each other, and are spaced apart from each other in the horizontal direction.

In addition, the joint member 36 has a pair of intermediate portions 41 for fixing the pair of connecting portions 37 to the support member 31. The pair of intermediate portions 41 are disposed to be spaced apart from each other, and are formed in a plate shape along the vertical direction. Each end of the pair of intermediate portions 41 is fixed to the support member 31 by welding or the like, and each other end is fixed to the connecting portion 37 by welding or the like.

In the present invention, in the process of joining the precast concrete beam 90 to be described later between the precast concrete pillars, the precast concrete beam 90 is not coupled while moving from the top to the bottom, but by moving horizontally from the side Adopt a way to Accordingly, the pair of connecting portions 37 and the inserting portion 39 which are directly coupled to the joint 80 of the precast concrete beam 90 to be described later should be formed in the horizontal direction. However, as described above, since the plurality of reinforcing bars 20 formed vertically along the circumference of the support member 31 is installed, the pair of connecting portions 37 directly support the member 31 without the intermediate portion 41. Cannot be bound to Therefore, in the present invention, the pair of connecting portions 37 formed in the horizontal direction are coupled to the support member 31 by using the pair of intermediate portions 41 formed in the vertical direction.

The pair of connection parts 37 fixed to the support member 31 by the intermediate part 37 are formed to protrude with respect to the outer surface of the concrete body 10, as shown in FIG.

The joint member 36 having the above-described configuration is installed on at least two outer surfaces of four outer surfaces of the square pillar-shaped support member 31, and two outer members are spaced apart from each other.

Meanwhile, the precast concrete beam 90 employed in the precast reinforced concrete structure 100 according to the present invention is not manufactured by pouring and curing wet concrete at a site for constructing the structure, but as prefabricated concrete in a factory or the like. A sieve 60, a plurality of rebars 70, and a joined body 80 are provided.

Since the concrete body 60 is used as a beam, the concrete body 60 is formed long along a horizontal direction, and is manufactured to have a cross-sectional shape of approximately four angles. A plurality of rebars are embedded in the concrete body 60. Reinforcing bars (71, 72) is a plurality of longitudinal reinforcement 71 and a plurality of transverse reinforcement (72) arranged in the longitudinal direction, that is, the horizontal direction of the concrete body 60 is embedded in a lattice form.

In addition, both ends of the concrete body 60 is formed with a concave receiving portion 61 to be filled with concrete to be cast in-situ. After the precast concrete column 50 and the beam 90 is completed primary bonding, the concrete is filled and cured in the receiving portion (61).

The joined body 80 is made of steel as a member for joining the precast concrete beam 90 to the precast concrete column 50, and is installed in the receiving portion 61 of the concrete body 60. In the present embodiment, the joined body 80 is formed substantially in a plate shape, and disposed two facing each other.

One end of the joined body 80 is embedded in the concrete body 60 and welded to the rebar 71. At the other end of the joined body 80, a protrusion 83 disposed to protrude from the concrete body 60 is formed. The protruding portion 83 is formed long in the horizontal direction and is fitted to the insertion portion 39 formed in the joining unit 30 of the precast concrete column 50.

A plurality of coupling holes 81 are also formed at a position corresponding to the plurality of through holes h formed in the pair of connection portions 37 of the precast concrete column 50 in the protrusion 83 of the precast concrete beam 90. Is formed.

In addition, a plurality of shear connectors 85 are coupled to the inner side of the joined body 80 at a portion disposed in the receiving portion 61 of the concrete body 60. The sheer connector is formed in a direction that intersects the longitudinal direction of the bonded body 80, and when concrete is poured into the receiving portion 61 in the field, the adhesive force between the bonded body 80 and the concrete is increased. In the present embodiment, a conventional stud bolt 85 is used as the shear connector.

The bolt (m) is a through hole (h) with the protrusion (83) of the joint (80) of the precast concrete beam (90) fitted in the insertion portion (39) of the joining unit (30) of the precast concrete column (50). And the coupling hole 81 and the nut (f) is fastened to the bolt (m), the primary coupling of the precast concrete pillar 50 and the precast concrete beam 90 is completed.

In the precast reinforced concrete structure 100 according to the present embodiment, as described above, the precast concrete pillar 50 and the precast concrete beam 90 are primarily coupled, referring to FIG. In the process, while the precast concrete pillars 50 are installed on both sides, the precast concrete beam 90 is moved horizontally. When the precast concrete beam 90 is horizontally moved, an insertion portion formed between the pair of connecting portions 37 protruding with respect to the precast concrete column 50 has a protrusion 83 protruding with respect to the precast concrete column 50. (39), the first coupling is completed by fastening the bolt (m) and the nut (f) in the state in which the protrusion 83 is fitted to the insertion portion (39).

As described above, when the primary coupling is completed, the precast concrete column 50 and the precast concrete beam 90 including the receiving portion 61 of the precast concrete beam (90) formwork at the site where the coupling After building (not shown), the concrete is filled into the formwork. Concrete is filled in a portion where the receiving portion 61 of the precast concrete beam 90 and the protrusion 83 and the inserting portion 39 are coupled to each other, and is formed on the support member 31 of the precast concrete column 50. It is also filled in the bonding unit 30 through the injection hole (33). In addition, the concrete is also connected to the concrete body 10 of the precast concrete pillar 50 through the openings 35 provided on the upper and lower portions of the support member 31 of the joining unit 30.

As described above, in the area where the concrete extends from the joint portion, as well as the joint portion where the precast concrete pillar 50 and the precast concrete beam 90 are directly connected, that is, the joint unit ( In the inner side and the precast concrete beam 90 of 30) by integrally placing and curing up to the charging portion 61 can improve the integrity of the precast concrete column 50 and the beam 90.

In addition, in the present embodiment, the so-called high toughness cement composite reinforced with synthetic fibers is used as concrete cast in situ. As described above, there is a risk that brittle fracture occurs due to stress concentration at the portion where the precast concrete column 50 and the beam 90 are bonded. When using a high toughness cement composite having excellent tensile performance, brittle fracture is prevented and ductility is achieved. By inducing deformation can ensure the stability of the structure.

As described above, by forming the formwork, placing and curing concrete at the joint and removing the formwork, the precast reinforced concrete structure 100 according to the preferred embodiment of the present invention is completed.

As described above, the precast reinforced concrete structure 100 according to the present embodiment first secures stability by first combining the precast concrete pillar 50 and the beam 90 newly designed according to the present invention, By in situ placing the tough cement composite to secondary bonding, the bonding process is very safe, and there is an advantage that the structural performance is improved by improving the integrity of the precast concrete column 50 and the beam 90 at the joint.

As described above, the present invention by peeling the reinforcing bar embedded in the beam in the conventional precast method and inserting the column in the manner of jointing the column and the beam, the joining unit 30 and the bonding body 80 1 Secondary steel joining (steel joining) and high-strength cement composite casting and curing simultaneously improve the rigidity of the joint and increase the integrity of the columns and beams, thereby improving the stability of the structure as a whole. There is an advantage. In addition, while the ease of construction is reduced in the conventional construction method has the advantage that the construction is made very easy.

Up to now, the support member 31 of the joining unit 30 employed in the precast concrete column 50 is made of a hollow secondary support for beams and columns, that is, the support member 31 when in-casting concrete Although described as being filled with the inner hollow portion of the concrete, the inner side of the support member 31 may be prepared by filling the concrete in advance in a factory or the like. A bonding unit 130 employing this type of support member 131 is shown in FIG. 6.

Referring to FIG. 6, when the precast concrete pillar 50 is manufactured in a factory or the like, the concrete p is also filled with the inner side of the support member 131. This is because filling the concrete p together with the inside of the support member 131 when manufacturing the precast concrete pillar 50 is advantageous in terms of ease of manufacture and economy. The hole formed in the support member 131 is an observation window 132 for checking whether the concrete p is completely filled inside the prefabricated support member 131.

In addition, although the pair of connecting portions 37 of the bonding unit 30 are all described and illustrated as being flat plates, the protrusions 83 of the bonding body 80 are inserted between the pair of connecting portions 37 ( In order to facilitate the insertion into 39, the inlet side of the insertion portion 39, i.e., one end of the pair of connection portions 37, may be formed to spread outward as shown in FIG.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

1 is a schematic perspective view of a precast reinforced concrete structure employing a precast concrete column and a precast concrete beam according to a preferred embodiment of the present invention.

FIG. 2 is a schematic perspective view of a joining unit employed in the precast concrete pillar shown in FIG. 1.

FIG. 3 is a schematic perspective view of the joint employed in the precast concrete beam shown in FIG. 1. FIG.

4 is a schematic front view for explaining the coupling process of the precast concrete pillar and beam shown in FIG.

FIG. 5 is a schematic cross-sectional view taken along the line VV of FIG. 4.

FIG. 6 is a schematic perspective view illustrating a bonding unit of a form different from that shown in FIG. 2.

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

100 ... precast reinforced concrete structures 10 ... concrete bodies

11 ... upper body 12 ... lower body

20 ... reinforcing bar 30 ... joining unit

31 ... support member 32 ... exposed joint

33 ... injection hole 34 ... cover

36 ... joint members 37 ... a pair of connections

39 ... inserts 41 ... a pair of intermediates

50 ... precast concrete column 60 ... concrete body

61 ... receptacle 71,72 ... rebar

80 ... joint 83 ... protrusion

90 ... Precast Concrete Beam

Claims (12)

In the precast concrete pillar is provided with a concrete body that is formed long in a vertical direction and a plurality of reinforcing bars embedded in the longitudinal direction in the interior of the concrete body, ready-made, Is formed along the longitudinal direction of the concrete body, at least one end of the upper end and the lower end is embedded in the concrete body and the support member is formed in the center portion exposed junction exposed to the outside; Interconnected with the precast concrete beams formed in a horizontal direction, a plurality of coupling parts are disposed spaced apart to face each other and have a pair of insertion portions formed along the horizontal direction between them is coupled to the exposed joint of the support member Precast concrete pillars characterized in that it comprises a joining unit having a joint member. The method of claim 1, The joint member is It is formed along the vertical direction, precast concrete pillars characterized in that it further comprises a pair of intermediate parts which are spaced apart from each other and fixed between the pair of connecting portions and the support member. The method of claim 1, The support member is installed in the center of the concrete body, both the upper end and the lower end of the support member is embedded in the concrete body, The pair of connecting portions of the joint member is precast concrete pillars, characterized in that formed to protrude relative to the outer surface of the concrete body. The method of claim 1, Precast concrete pillars, characterized in that the one end of the pair of connecting portion is formed to be spread outward so that the inlet side of the insert is wide. The method of claim 1, The support member is made of a hollow type, Precast concrete pillars are characterized in that the injection hole is formed in the exposed joint portion of the support member so that the concrete poured in the field can be injected into the support member. The method of claim 5, Covers are respectively coupled to upper and lower ends of the support member, The cover is a precast concrete pillar, characterized in that the opening is formed to communicate with the inside of the support member. The method of claim 1, The support member has a rectangular pillar shape, Precast concrete pillars, characterized in that each of the two connecting members are arranged on at least two of the four surfaces of the support member. The method of claim 1, Precast concrete pillars, characterized in that a plurality of through-holes are formed in the pair of connecting portions of the joint member at positions corresponding to each other so that the bolt can be inserted. The method of claim 1, The support member is made of a hollow type, The inner hollow portion of the support member is filled with ready-made concrete, The support member is a precast concrete pillar characterized in that the observation hole for confirming whether the concrete is filled in the hollow portion. In a precast reinforced concrete structure in which a frame of a structure is constructed by a precast concrete column prefabricated as a vertical structural member and a precast concrete beam prefabricated as a horizontal structural member, The precast concrete pillar is formed along a longitudinal direction of the concrete body, a plurality of reinforcing bars embedded in the longitudinal direction in the interior of the concrete body in the longitudinal direction and the concrete body, at least of the upper end and the lower end One end portion is embedded in the concrete body and a pair of connecting portions formed in the center portion spaced apart facing each other and the insertion portion is formed along the horizontal direction between the support member is formed exposed exposure to the outside And a joining unit having a plurality of joint members coupled to the exposed joint of the support member. The precast concrete beam is formed long in the horizontal direction, the end of the concrete body is formed with a receiving portion to be filled with concrete to be cast in the site, a plurality of reinforcement and one end embedded in the longitudinal direction inside the concrete body It is installed in the receiving portion of the concrete body in the state buried in the interior of the concrete body, the other end is provided with a joint body is disposed to protrude with respect to the concrete body and the protrusion is formed in the horizontal direction, In the state in which the protrusion of the precast concrete beam is fitted to the insertion portion of the precast concrete pillar and coupled, the precast concrete pillar and the precast concrete beam Precast reinforced concrete structure, characterized in that the mutual bonding. The method of claim 16, The support member is a quadrangular column shape, the joint member is disposed on each of at least two of the four sides of the support member, each two, A plurality of through holes through which a bolt can be inserted are formed in the pair of connection parts of the support member of the precast concrete pillar, and a plurality of coupling holes through which the bolt can be inserted into the protrusion of the joint of the precast concrete beam are formed. Precast reinforced concrete structure, characterized in that the precast concrete beam is joined to the precast concrete pillar by the bolt is fitted into the through hole and the coupling hole of the pair of the connection portion. The method of claim 11, The support member of the precast concrete pillar is made of a hollow type, An injection hole is formed in the exposed joint of the support member so that concrete poured in the field can be injected into the support member, and the concrete of the precast concrete beam is cast together with the receiver of the precast concrete beam. , The cast-in-place concrete is a precast reinforced concrete structure, characterized in that the high toughness cement composite.

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