KR20220142848A - Self-supporting ring girder - Google Patents

Abstract

The present invention relates to a self-supporting ring girder which is a structure for a girder, capable of bearing a construction load while enabling a girder of a building structure to be constructed by placing concrete inside so that the girder of the building structure is composed with a slab and formed as a T-girder. The self-supporting ring girder comprises: multiple square ring pieces arranged at intervals in the longitudinal direction; a preassembled reinforcing bar installed in the square ring piece, and comprising a lower horizontal bar and a stirrup; and an exterior plate attached to and installed in the external surface of the square ring piece. The square ring piece comprises: a pair of side pieces vertically formed on both sides; a lower piece connecting lower ends of the side pieces; and a supporting stiffener installed between the pair of side pieces to be parallel with the lower piece by being spaced from the lower piece. The lower horizontal is integrated with the supporting stiffener by being welded. A support angle is integrated with an upper end of the side piece in the longitudinal direction by being welded. Therefore, the square ring piece, the lower horizontal bar, and the support angle move as one body.

Description

Self-supporting ring girder {SELF-SUPPORTING RING GIRDER}

The present invention is a beam structure that allows the beam of the building to be constructed by pouring concrete therein so that the beam of the building can be synthesized with the slab and behave as a T-beam that can efficiently resist self-weight and used load. It's about structure.

As the slab is placed on the beam of the building, the load of the slab is transmitted to the column through the beam.

However, a positive moment is generated in the center of the beam by the load of the slab, and accordingly, a compressive stress is generated in the upper part of the beam and a tensile stress is generated in the lower part of the beam.

Accordingly, it is a general trend to combine the slab and the beam so that the concrete slab with high resistance to compressive stress can bear the compressive stress and minimize the cross section of the beam so that it behaves as a T-beam.

For example, Figure 1 is for the synthesis with such a slab, a steel beam having a rectangular cross section and an empty inside is formed, and the steel beam is synthesized with a slab so that it can have a cross section of a T-beam.

However, in the composite structure using the steel beam of FIG. 1, since the steel plate of the steel beam must serve as a structural member, the thickness must have at least the thickness calculated in the structural calculation, and in addition, the steel material so that the use of the copper bar can be omitted To make the beam self-supporting, the steel plate must be thicker than the structurally required thickness. In addition, the outer surface of the steel plate must be fire-resistant. Therefore, the above-described synthetic structure is not preferable from an economic point of view because it incurs a large cost.

FIG. 2 relates to a beam structure for another composite structure. Unlike the example of FIG. 1, the steel plate constituting the outer shell of the beam does not function as a structural member but only functions as a formwork. A reinforcing bar assembly for the structure is inserted. Therefore, the steel plate of the outer shell enables the use of a very thin plate, and there is no need to necessarily perform a fireproof treatment on the outer surface.

However, in the gait structure of FIG. 2, a means for maintaining the thickness of the reinforcing bar assembly must be installed on the inner surface of the steel plate, and since it is impossible to secure independence by the steel plate or rebar assembly of the outer shell, the problem of having to install the copper bar at the bottom of the concrete pouring structure There is this.

US 10-2212695 B1 US 10-2170355 B1

The present invention is to solve the above problems of the prior art, and a reinforcing bar assembly is installed inside to have a reinforced concrete structure in case of an emergency such as a fire, so that fireproof treatment can be omitted on the steel plate constituting the outer skin of the gaiting structure, and the reinforcing bar By allowing the assembly to have high independence, it is possible to use the steel plate of the outer shell as a very thin plate, and it can withstand the construction load such as concrete pouring, thereby minimizing the use of the copper bar and providing a self-supporting ring girder with improved manufacturability. would like to provide

According to the most preferred embodiment of the present invention for solving the above problems, a plurality of square ring pieces arranged while being spaced apart from each other in the longitudinal direction, and a line installed inside the square ring piece and including a lower horizontal muscle and a stirrup muscle The assembly reinforcing bar body and the shell plate attached and installed on the outer surface of the square ring piece are included, and the square ring piece includes a pair of side pieces formed vertically from both sides, a lower piece connecting the lower end of the side piece, and the lower piece It consists of a support stiffener installed between a pair of side pieces so as to be spaced apart from and parallel to it, the lower horizontal muscle is integrated with the support stiffener by welding, and a support angle is integrated in the longitudinal direction at the upper end of the side piece by welding. , There is provided a self-supporting ring girder, characterized in that the square ring piece, the lower horizontal muscle and the support angle are configured to act integrally.

Also, as another embodiment of the self-supporting ring girder, a shape retaining stiffener may be further installed on the upper end of the pair of side pieces, and an X-shaped brace muscle is further installed between the pair of side pieces together or alone more can be reinforced.

In addition, as another means of reinforcing the self-supporting ring girder, an oblique muscle connecting the upper end of one side and the lower end of the side of the other side between each side of the adjacent square ring piece may be further installed, at this time between each side of the adjacent square ring piece It is possible to respond to the change in stress acting on the ring girder by increasing the number of oblique muscles installed in the center from the center to both ends.

As other reinforcing means, by installing a reinforcing angle on the inner surface of the shell plate, the side plate of the shell plate or the square ring piece can be reinforced with respect to the ring girder in the case of a large bochum.

In addition, by providing an end connection piece to the square ring piece as a means for joining with the column, it is possible to join the ring girder to the column by a bolt fastening method.

Since the ring girder of the present invention forms a rectangular box-shaped three-dimensional structure in which the pre-assembled reinforcing bar body behaves integrally with the rectangular ring piece and the supporting angle, it has high flexural and shear rigidity and can support its own weight and construction load. It is possible to omit temporary materials such as installation or temporary work, and it is possible to shorten the construction period by facilitating the progress of the adjacent process by securing a wide workshop.

In addition, the ring girder of the present invention can facilitate the installation of reinforcement and joining means by using a square ring piece, thereby making it possible to easily and stably implement a large cross-section beam, as well as a change in stress occurring in the beam or ring girder. As it can be reinforced according to

In addition, the ring girder of the present invention ensures independence by the pre-assembled reinforcing body, so that the thickness of the steel sheet for constituting the outer skin plate can be used as a very thin sheet, and in case of emergency such as fire, the pre-assembled reinforcing body is used Since it has a reinforced concrete structure, even if the steel plate is used for structural purposes in ordinary times, it does not require a fireproof treatment for it, so that it is possible to promote economical construction.

1 is a perspective view and a cross-sectional view of a gait structure of a composite structure according to the prior art.
2 is a perspective view and a cross-sectional view of a gait structure of a composite structure according to another prior art.
3 is a perspective view and a cross-sectional view of a ring girder according to an embodiment of the present invention.
4 is a perspective view of the inner structure of the ring girder.
5 and 6 are perspective and cross-sectional views of each embodiment of a ring girder provided with torsion reinforcing means.
7 and 8 are a perspective view and a cross-sectional view of each embodiment of a ring girder provided with a reinforcing means.
9 to 11 are perspective and cross-sectional views of each embodiment of a ring girder provided with reinforcing means in the case of a large beam dance.
12 is a perspective view and a plan view of an embodiment related to the bonding structure of the ring girder to the column.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the description of the present invention, in the case of obscuring or obscuring the technical idea of the present invention due to the detailed description of the known configuration, the description of the above known configuration will be omitted.

Figure 3 relates to a ring girder (G) according to an embodiment of the present invention, (a) is a perspective view thereof, (b) is a cross-sectional view thereof, (c) is the upper structure of the cross-section of the ring girder (G) It is a cross-sectional view of another embodiment. 4 is a perspective view of the inner structure of the ring girder (G) except for the outer skin plate 30 forming the outer skin of the ring girder (G).

The ring girder (G) of the present invention is a beam structure that allows a beam of a building to be built by pouring concrete therein. (20) and the outer shell plate 30 is included and configured.

Among them, the square ring piece 10 integrates the pre-assembled reinforcing bar body 20 and the support angle 40 to be described later while a plurality of them are arranged at a predetermined distance from each other in the longitudinal direction of the ring girder G, so that they are integrated. By forming a rectangular box-shaped three-dimensional structure that behaves as a ring girder (G) or a pre-assembled reinforcing bar body 20, it is possible to have high self-supporting rigidity.

The square ring piece 10 is formed vertically from both sides to form a side of the beam, a pair of side pieces 11, and a lower piece 12 connecting the lower end of each side piece 11 and forming the lower surface of the beam, and , It consists of a support stiffener 13 installed between a pair of side pieces 11 so as to be spaced apart from the lower piece 12 and parallel thereto, and as necessary, connecting the upper end of each side piece 11 while connecting the upper end of each side piece 11 as necessary. Reinforcing members such as shape retaining stiffeners 14 to prevent the both side pieces 11 from being opened by the can be further installed.

The upper end of each side piece 11 of the plurality of square ring pieces 10 continuously arranged at a predetermined interval is integrated with the support angle 40 arranged in the longitudinal direction of the ring girder G by welding.

The support stiffener 13 has a square cross-section together with the lower piece 12, thereby maintaining the shape of the square ring piece 10 and fixing the lower horizontal muscle 22, which is the main root, so that it is formed with the square ring piece 10 and to become one It is preferable that the spacing between the lower piece 12 and the support stiffener 13 be made as much as the covering thickness of the lower horizontal muscle 22 .

The pre-assembled reinforcing bar body 20 is composed of a lower horizontal muscle 22 fixedly installed on the support stiffener 13 as described above, and a stirrup muscle 23 disposed in a vertical direction to the lower horizontal muscle 22, It is pre-assembled, including the square ring piece (10). The upper horizontal reinforcing bar 21 of the auxiliary reinforcing bar located at the upper portion and embedded in the slab is generally installed in the field, but may be installed together when the pre-assembled reinforcing bar body 20 is manufactured.

The lower horizontal muscle 22 is integrated with the support stiffener 13 by welding, thereby fixing each lower portion of the square ring piece 10 continuously arranged at a predetermined interval.

In this way, the plurality of square ring pieces 10 continuously arranged in the longitudinal direction of the ring girder G, the upper end is fixed by the support angle 40 and the lower end is fixed by the lower horizontal muscle 22, so these square ring pieces (10) and the lower horizontal muscle 22 and the support angle 40 are assembled in a three-dimensional shape of a square tube and have the ability to efficiently resist external loads while acting as one.

It is preferable that the upper portion of the stirrup muscle 23 installed in the vertical direction of the ring girder G while surrounding the lower horizontal muscle 22 is fixed to the upper horizontal muscle 21 .

The outer surface of the square ring piece 10 is provided with an outer skin plate 30 attached. As shown in (b) of FIG. 3 , when the upper end of the square ring piece 10 is fixed to overlap with the flange of the support angle 40 , the upper end of the shell plate 30 is continuous to the flange of the support angle 40 . The shell plate 30 may be attached and installed in a shape such that the upper end of the square ring piece 10 is fixed to be continuous without overlapping with the flange of the support angle 40 as shown in FIG. The outer shell plate 30 may be attached and installed to cover the outer surface of each of the flanges and the square ring piece 10 of these interconnected support angles 40 .

The pre-assembled reinforcing bar body 20 installed inside the square ring piece 10 allows the beam structure to have a reinforced concrete structure, so that the strength of the beam can be maintained even in case of emergency, such as a fire. Therefore, the skin plate 30 can reduce the amount of steel used and reduce the weight of the ring girder (G) by using a thin plate with a very thin thickness to have only a pure formwork function.

Of course, by using a thicker steel plate for the shell plate 30, it can also serve as a structural function. In this way, when using the shell plate 30 for a structural role, even if the outer surface is not subjected to fire-resistance treatment, the pre-assembled reinforcing bar body 20 allows the beam constructed by the ring girder (G) of the present invention to be made of steel-framed reinforced concrete in ordinary times. It functions as a structure to bear a larger load, and in case of fire, etc., the beam functions as a reinforced concrete structure except for the outer shell plate 30, so that the bearing capacity of the beam can be maintained as much as possible for a long time. make it possible to promote

In addition, the support angle 40 installed in the longitudinal direction of the ring girder (G) is fixed by welding the upper end of the side piece 11 of each square ring piece 10 disposed at a predetermined interval as described above by welding the ring girder (G). On the other hand, it functions as a support member for a structure for a slab, such as a deck plate to be placed on the upper end of the shell plate 30 .

The support angle 40 on which the structure for the slab is placed reduces the compressive force applied to the shell plate 30 by transmitting the resulting load to the square ring piece 10 . This stress structure allows the shell plate 30 to be composed of a steel plate having a minimum thickness having only a formwork function.

The support angle 40 may be installed so that the flange faces outward as shown in FIG. 3 , and the flange is installed so that the flange faces inward so that the flange is the upper end of the outer skin plate 30 and the square ring piece 10 . The upper side of the side piece 11 and the shape retaining stiffener 14 may be wrapped together.

The ring girder G configured as described above may be further provided with various reinforcing means according to its specifications. At this time, the square ring pieces 10 continuously arranged at predetermined intervals facilitate the installation of the reinforcing means.

5 and 6 each show an embodiment in which the torsion of the ring girder G is reinforced as one of the reinforcing means.

The ring girder (G) of the present invention maintains the shape of the square cross-section by the square ring piece 10 composed of the side piece 11, the lower piece 12 and the support stiffener 13, and in addition to this, the side piece 11 upper end By installing the shape-retaining stiffener 14 in the above, the shape of the square cross-section is not easily twisted. However, when the cross-sectional size of the ring girder (G) is very large, there is a possibility that torsional deformation may occur due to the horizontal load or eccentric action.

Therefore, in another embodiment of the present invention, when the cross-sectional size of the ring girder (G) is very large as described above, at least one of the square ring pieces (10) continuously arranged so that torsional deformation does not easily occur in the ring girder (G) is X. A female brace muscle 51 is further installed.

The X-shaped brace muscle 51 has one end attached and fixed to one side piece 11 of the square ring piece 10, and the other end is attached and fixed to the other side piece 11 of the square ring piece 10, whereby the square ring piece 10 is fixed. An X-shaped brace is formed inside to prevent the rectangular cross section from being deformed.

The X-shaped brace muscle 51 may be installed on the inner surface of the square ring piece 10 as shown in FIG. 5 , or may be installed on the side surface of the square ring piece 10 as shown in FIG. 6 .

The end of the X-shaped brace muscle 51 is preferably configured to have the same vertical shape as the side piece 11 so that welding for attachment to the side piece 11 of the square ring piece 10 is easy.

7 and 8 are one of the further reinforcement means for the ring girder (G), each showing each embodiment for the bending reinforcement of the ring girder (G).

The above-described bending reinforcement is made in such a way that the oblique muscle 52 is installed in the longitudinal direction of the ring girder (G) between the continuously arranged square ring pieces (10). These oblique muscles 52 are installed so as to be symmetrical to both sides of the ring girder (G).

For example, as shown in FIG. 7 , an oblique muscle 52 is installed between each side piece 11 of the square ring piece 10 adjacent to each other, and one end of the oblique muscle 52 is the upper end of one side piece 11 and By connecting and having a structure in which the other end is connected to the lower end of the adjacent other side piece 11 , the inclined muscle 52 and the side piece 11 of the square ring piece 10 have a truss structure. This truss structure increases the bending rigidity of the ring girder (G) itself.

On the other hand, the shear stress of the ring girder G increases toward both ends. Accordingly, local buckling in the shape of an oblique wrinkle may occur in the skin plate 30 . In order to prevent this, if the thickness of the skin plate 30 is increased, the central portion has an excessive thickness, resulting in wastage of steel.

Therefore, in another embodiment of the present invention, by reinforcing the plate element on the compression side of the shell plate 30 with the inclined muscle 52 forming a truss structure together with the square ring piece 10 as described above, the excess of the steel material Solve usage problems.

FIG. 8 is a diagram showing this, and by bringing the oblique muscle 52 into contact with the skin plate 30 and integrating them by welding, buckling occurs in the oblique muscle 52 and the skin plate 30 due to mutual action. prevent doing

In addition, by changing the number of inclined muscles 52 installed between each square ring piece 10 to effectively respond to the change in stress generated in the ring girder G, the thickness of the shell plate 30 is minimized. can lead to economic improvement.

For example, as shown in FIG. 8, the inclined muscle 52 installed between each side piece 11 of the adjacent square ring piece 10 increases from the center of the ring girder G to both side ends. It is possible to prevent the occurrence of local buckling in the thin skin plate 30 in that portion by responding to the high shear stress generated at both ends of the ring girder (G).

9 to 11 each exemplify the reinforcement means of the ring girder (G) for the case where the beam dance is large.

The reinforcing means in this embodiment is made in such a way that the reinforcing angle 53 is installed on the inner surface of the outer skin plate 30 .

The reinforcing angle 53 may be installed in the longitudinal direction of the ring girder G as shown in FIGS. 9 and 10 at the intermediate height of the ring girder G, and as shown in FIG. 11, the ring girder ( It may be installed between the outer skin plates 30 on both sides in the transverse direction of G). Of course, the reinforcing angle 53 may be installed in both the longitudinal direction and the transverse direction.

In the case of the former reinforcement means installed in the longitudinal direction of the ring girder G, it is preferable that the reinforcement angle 53 be integrated with the square ring piece 10 together with the shell plate 30. The side piece of the square ring piece 10 ( 11) and the step difference between the skin plate 30 can be overcome.

This longitudinal reinforcing angle 53 not only prevents local buckling of the skin plate 30 due to an upper load and deformation due to lateral pressure of the concrete poured therein, but also between each side piece 11 continuously arranged. The buckling deformation of the side piece 11, which is inevitably configured to be long vertically, is prevented by dispersing the stress to the lateral side 11 due to the large bochum.

In addition, in the case of the latter reinforcing means installed in the transverse direction of the ring girder G, the reinforcing angle 53 is preferably installed between the shell plate 30 and the shell plate 30 facing each other. At this time, the reinforcing angle 53 serves as a tie bar between the shell plates 30 on both sides, and as in the former reinforcement method, local buckling of the shell plate 30 due to the upper load as well as the lateral pressure of the concrete poured therein. to prevent deformation.

Figure 12 shows an example in which the ring girder (G) is joined to the column (P) in a bolt fastening method by using the square ring piece (10).

According to the embodiment of Fig. 12 described above, the end connecting piece 54 is further installed in the square ring piece 10 located at the end of the ring girder (G). The end connection piece 54 is installed in such a way that it is superimposed or extended to the side piece 11 of the square ring piece 10, and its thickness is made larger than the side piece 11 so that it can sufficiently respond to a large shear stress at the joint portion. It is preferable to do

In the above, the present invention has been described in detail with reference to specific embodiments, but the embodiments are merely examples for easy understanding of the present invention. It is obvious that it can be implemented with various modifications within. Accordingly, such modifications will be said to be within the scope of the present invention as described in the claims.

10; square ring piece 11; side
12; Part 13; support stiffener
14; shape retaining stiffener 20; prefabricated rebar
21; upper horizontal muscle 22; lower horizontal muscle
23; stirrup muscle 30; skin plate
40; support angle 51; brace muscle
52; oblique muscle 53; reinforcement angle
54; end connecting piece G; ringer
P; Pillar

Claims (7)

As a beam structure that allows the beam of a building to be built by pouring concrete inside,
A plurality of square ring pieces 10 disposed while being spaced apart from each other in the longitudinal direction,
A pre-assembled reinforcing bar body 20 installed inside the square ring piece 10 and comprising a lower horizontal muscle 22 and a stirrup muscle 23;
A shell plate 30 attached to and installed on the outer surface of the square ring piece 10 is included and configured,
The square ring piece 10 is spaced apart from and parallel to a pair of side pieces 11 formed vertically from both sides, a lower piece 12 connecting the lower end of the side piece 11, and the lower piece 12 so as to be parallel thereto. Consists of a support stiffener 13 installed between a pair of side pieces 11,
The lower horizontal muscle 22 is integrated with the support stiffener 13 by welding, and the support angle 40 is integrated with the upper end of the side piece 11 in the longitudinal direction by welding, the square ring piece 10 and the lower A self-supporting ring girder, characterized in that the horizontal muscle (22) and the support angle (40) are configured to act integrally.
According to claim 1,
A self-supporting ring girder, characterized in that a shape retaining stiffener (14) is installed at the upper end of the pair of side pieces (11).
According to claim 1,
A self-supporting ring girder, characterized in that an X-shaped brace muscle (51) is installed between the pair of side pieces (11).
According to claim 1,
A self-supporting ring girder, characterized in that between each side piece 11 of the adjacent square ring piece 10, an oblique muscle 52 connecting the upper end of the side piece 11 on one side and the lower end of the side piece 11 on the other side is installed.
5. The method of claim 4,
A self-supporting ring girder, characterized in that the number of oblique muscles (52) installed between each side piece (11) of the adjacent square ring piece (10) increases from the center to both side ends.
According to claim 1,
A self-supporting ring girder, characterized in that a reinforcing angle (53) is installed on the inner surface of the shell plate (30).
According to claim 1,
A self-supporting ring girder, characterized in that the end connecting pieces 54 for bonding with the pillars (P) are installed in the square ring pieces (10) located at both ends.

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