KR20190012766A - Built-Up Beam - Google Patents

Abstract

The present invention relates to a top U-shaped lattice composite beam and, more specifically, to a top U-shaped lattice composite beam which has a U-shaped upper flange formed on an upper part, has a U-shaped lower flange formed on a lower part, and a lattice member connecting the upper and lower U-shaped lattice flanges, such that buckling strength for compressive force of an upper element with respect to central positive moment generated in a construction step is increased and concrete is deposited simultaneously with construction of a bottom plate slab to form a type of a beam as an RC system. According to one preferred embodiment of the present invention, the top U-shaped lattice composite beam comprises: the upper flange including a horizontal plate and a side surface extended from both lateral end parts of the horizontal plate to an upper or lower part to have a u- or n-shaped cross section; a lower flange including a horizontal plate, a side surface upwardly extended from both lateral end parts of the horizontal plate, and a holding plate inwardly or outwardly extended from the top part of the side plate in a lateral direction to be spaced apart from the lower part of the upper flange at a predetermined interval; and a connecting shear member coupled to connect the upper and lower flanges.

Description

Top U-shaped Lattice Composite {Built-Up Beam}

The present invention relates to a top U-shaped lattice composite sheet, and more particularly, to a top U-shaped lattice composite blank, which comprises a U-shaped upper flange at its upper portion and a U- shaped lower flange and a lattice material connecting the U- To increase the buckling strength with respect to the compressive force of the element, and to concurrently place the concrete at the time of constructing the bottom plate slab, so that the RC type of the beam can be formed.

It is a structural member which supports the load by the bending and shearing. It is also called the bending material because the bending moment dominates the structural behavior. The stresses and deformations caused by the bending and shearing are mainly seen, but the torsion is accompanied if the working loads do not coincide with the shear center of the section. Therefore, sufficient bending strength and shear strength (or torsional strength) should be maintained, and as it is used as a horizontal member, usability for sagging should be ensured.

Particularly, as the section of the steel beam member, the H-shaped section is mainly used, and the box-shaped, I-shaped, and C-shaped sections are used, and a built-up beam manufactured by bonding is used. A box section may be used if the buckling length is very long. In particular, since the steel beam member generally supports the bottom plate on the section of the upper element, the height of the bottom plate and the height of the steel beam member It is an exposed structure that needs to be secured and it is difficult to reduce the thickness.

In addition, the existing beam member has a problem in that the cross section increases or the amount of steel used increases in order to increase the buckling strength with respect to the compressive force of the upper element corresponding to the longitudinal moment at the center portion generated in the construction step. There is a problem that the torsion resistance performance is deteriorated because the compression section of the upper element is small in relation to the horizontal force or the asymmetric load as well as the vertical load during construction.

As a background technique of the present invention, there is Korean Patent Registration No. 0626542 entitled " Composite Beam Structure Using Steel Sheet Formed Beams and Concrete "(Patent Document 1). (A) a bottom plate horizontally provided with a thin plate-like steel plate so as to form a lower surface of the beam; A pair of side vertical plates extending from both side ends of the bottom plate in the vertical direction and forming both side surfaces of the beam; A support wing extending horizontally from an upper end of the side vertical plate; A central vertical plate extending in a vertical direction at an upper center of the bottom plate and having a longer length than the length of the side vertical plates; And an upper flange extending horizontally from an upper end of the central vertical plate and formed in a 'T' shape with the central vertical plate. (b) a bottom plate unit provided on the upper part of the steel plate formed-by-support bobbin to form a slab structure; And (c) a beam-slab concrete integrally installed in the inside of the steel plate formed beam and the upper part of the bottom plate unit, wherein the steel plate molding is formed by continuously bending one steel plate member A side vertical plate is formed by upwardly bending one end of the bottom plate to horizontally bend the upper end of the side vertical plate to form a support wing and the other side of the bottom plate is bent upward to form a central vertical plate, Wherein a half steel plate formed by forming an upper flange by horizontally bending the upper end of the vertical plate is provided and a pair of the half steel plate forming bosses are attached so as to face each other between the central vertical plates. Composite beam structure '.

However, the background art also has a problem in that the cross section increases or the amount of steel used increases in order to increase the buckling strength with respect to the compressive force of the upper element corresponding to the longitudinal moment generated in the construction step.

Korea Patent No. 0626542 "Composite beam structure using steel plate formed beam and concrete"

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a U-shaped upper flange, It is possible to increase the compressive force or buckling strength by improving the stiffness and to improve the torsional resistance of the section not only to the vertical load during construction but also to the horizontal force or the asymmetric load so that the bending strength of the section can be used without reduction by buckling, The present invention also provides a tower U-shaped lattice composite beam that can be buried in a slab to reduce the height of the beam.

The present invention relates to an upper flange having a horizontal plate and a side plate extending upward or downward from both ends in the width direction of the horizontal plate and having a u-shaped or n-shaped cross-section; A side plate extending upward from both end portions in the width direction of the horizontal plate and a mounting plate extending inward or outward in the width direction at an upper end of the side plate, A flange; And a connection front end member connected to connect the upper flange and the lower flange.

Also, it is desirable to provide a tower U-shaped lattice composite sheet characterized in that the horizontal plate is formed with a shear connection hole at a predetermined interval.

It is also desirable to provide a top U-shaped lattice composite that is characterized in that the upper flange is formed with a reinforcing plate extending inwardly in the width direction at the ends of the side plates.

Also, it is desirable to provide a top U-shaped lattice composite sheet characterized in that the connection front end member is made of lattice roots.

The connection front end member is formed by bending a wire material and has a pair of horizontal portions formed in parallel, a side portion extending downward from the horizontal portion, and a connecting portion connecting the side portions horizontally. The length of the lower flange And the upper flange is seated on the upper part of the horizontal part of the connection front part or is coupled to the lower part of the horizontal part.

The top U-shaped lattice composing member is joined to the top flange by an n-shaped cross-section, and a coupling member having a predetermined size is formed at a predetermined interval at a lower end of the side plate, ≪ / RTI >

In addition, at both longitudinal end portions of the upper flange and the lower flange, a widthwise central portion of the horizontal plate is cut by a predetermined length inwardly in the longitudinal direction to form a cut, and the upper plate, the lower plate, And a web having an H-shaped cross-section is joined to the web by interposing the web into the cut-out portion.

In addition, a cover-type end joint member having an n-type cross-section composed of a horizontal top plate and vertical side plates extending vertically downward from both sides in the width direction of the horizontal top plate extends inwardly from both ends in the longitudinal direction of the lower flange, And the vertical side plate is joined to the lower flange and the side plate so that the plate is overlapped with the upper plate of the upper flange to be formed in two layers, and the vertical side plate is joined to the lower flange and the side plate.

The top U-shaped lattice composite of the present invention can be formed as a top-type u-shaped upper flange so as to improve the cross-sectional specificity against the compression resistance of the upper element corresponding to the longitudinal moment generated in the construction step, And the buckling strength is increased and the torsional resistance of the section is excellent not only for the vertical load during construction but also for the horizontal force or asymmetric load so that the bending strength of the section can be used without reducing by buckling. So that a part of the beam section can be embedded in the slab, thereby reducing the thickness of the beam.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
1 is a perspective view of one embodiment of a top U-shaped lattice composite of the present invention.
Fig. 2 is a cross-sectional view of the above-mentioned Fig. 1 and various modified examples.
3 is a perspective view of another embodiment of a top U-shaped lattice composite of the present invention.
4 is a cross-sectional view of the above-mentioned FIG. 3 and a modification thereof.
5 is a perspective view showing another embodiment of the connection front end member of the present invention.
6 is a cross-sectional view illustrating various joining methods of the connection front end member and the upper flange of the present invention.
Fig. 7 is a perspective view of another embodiment of Fig. 6 (a).
8 is a perspective view and a cross-sectional view of an embodiment in which an H-shaped end joint material is joined to a column U-shaped lattice composite of the present invention.
FIG. 9 is a perspective view and a cross-sectional view of an embodiment in which a cover-type end joint member is coupled to a column U-shaped lattice composite of the present invention.
10 is a perspective view of another embodiment of FIG.
11 is a cross-sectional view of an embodiment in which a compression reinforcement member is provided in the column U-shaped lattice composite of the present invention.

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.

The present invention comprises a U-shaped upper flange on the upper part and a U-shaped lower flange on the lower part and a lattice material connecting the U-shaped lower flange, thereby increasing the buckling strength with respect to the compressive force of the upper part, The present invention relates to a tower U-shaped lattice composite beam capable of simultaneously casting concrete at the time of constructing a bottom plate slab, thereby making the RC system a beam type.

FIG. 1 is a perspective view of a top U-shaped lattice composite sheet of the present invention, and FIG. 2 is a sectional view of FIG. 1.

1 and 2, the top U-shaped lattice composite sheet 1 of the present invention comprises an upper flange 10 having a u-shaped or n-shaped cross section at its upper portion and a lower flange 20 having a u- And a connection front end member 30 connecting the upper flange 10 and the lower flange 20 so as to increase the compressive force or buckling strength of the center portion moment generated in the construction step, The cross-sectional torsional resistance against the asymmetric load is excellent, so that the bending strength of the cross-section can be used without reducing by buckling.

As shown in Figs. 1 and 2, the upper flange 10 of the present invention is constructed in the longitudinal direction of the tower u-shaped lattice composite sheet 1, and is formed by compressing the compressive force of the upper element relative to the longitudinal moment So as to increase the buckling strength.

1 and 2A (a), the upper flange 10 has a horizontal plate-like horizontal plate 11 formed of a steel material and formed horizontally, and a lower flange 10 extending downward from both ends in the width direction of the horizontal plate 11 And an extending side plate 12, and is formed to have an n-type section.

The upper flange 10 may be formed to have an u-shaped cross section so that the side plates 12 extend upward at both ends in the width direction of the horizontal plate 11, as shown in Fig. 2A (b).

In this way, the upper flange 10 is formed to have a u-shaped or n-shaped cross-section so that the concrete is simultaneously poured into the end face of the upper flange 10 at the time of constructing the bottom slab to be embedded in the slab bottom plate, It may also act as a shear connection.

Particularly, the horizontal plate 11 may be formed with a shear connection hole 111 at a predetermined interval. The shear connection hole 111 may have various shapes such as a circular shape and an elliptical shape. And the size thereof can be variously formed.

The connection front end member 30 connecting the upper flange 10 and the lower flange 20 may be constructed in a vertical direction or in the case where the horizontal plate 11 of the upper flange 10 is narrow, The side plate 12 of the upper flange 10 is provided with a joining surface to the connecting front end member 30 which is joined to the upper flange 10 so as to be inclined as shown in Figs. .

2B, the upper flange 10 is formed so that a reinforcing plate 13 extending inward in the width direction is formed at the end of the side plate 12, so that the vertical load and the twist And the like.

1 and 2, the lower flange 20 includes a horizontal plate 21, a side plate 22 extending upward from both end portions in the width direction of the horizontal plate 21, And a mounting plate 23 configured to extend inward in the width direction.

At this time, the width of the horizontal plate 21 is formed to be larger than the width of the horizontal plate 11 of the upper flange 10, so that joining of the connection front end members 30 can be facilitated.

Figure 3 is a perspective view of another embodiment of a top U-shaped lattice composite of the present invention, and Figure 4 is a cross-sectional view of Figure 3 and a cross-sectional view of a variation.

As described above, the mounting plate 23 may extend inward in the width direction of the horizontal plate 21 and may extend outward in the width direction as shown in Figs. 3 and 4.

Such a mounting plate 23 is constructed by directly mounting a known base plate such as a deck plate, a PC bottom plate or a hollow bottom plate for constructing a bottom plate so as to facilitate the mounting, and at the same time, It is possible to reduce the height of the floor by allowing the floor to be installed at a certain height of the dancing of the lattice composite ball 1.

The connection front end member 30 is joined to connect the upper flange 10 and the lower flange 20 in a state of being spaced apart from each other by a predetermined distance and the upper flange 10 and the lower flange 20 are joined at both sides of the upper flange 10, Such as welding, so as to connect them to each other.

The connecting shear member 30 may have various shapes and a single inclined member having a predetermined length of a round bar or an oblique bar may be formed at a predetermined interval in the longitudinal direction of the upper flange 10 so that the upper flange 10 and the lower flange 10 20, or is formed by using a round bar or an oblique muscle, and is formed so as to be repeatedly formed so as to be repeatedly inclined at a predetermined angle (typically 60 degrees) or to be formed in a serpentine shape repeatedly And the upper flange 10 and the lower flange 20 can be connected to each other by constituting one or more unit bent roots in the longitudinal direction.

2, the upper end of the connection front end member 30 is joined to the side plate 12 of the upper flange 10 and the lower side thereof is joined to the end of the mounting plate 23 of the lower flange 20 As shown in Fig. 4, the upper portion is joined to the side plate 12 of the upper flange 10 and the lower portion is joined to the inner side of the side plate 22 of the lower flange 20 To be bonded.

FIG. 5 is a perspective view showing another embodiment of the connecting shear member of the present invention, and FIG. 6 is a sectional view showing various joining methods of the connecting shear member and the upper flange of the present invention.

As shown in FIG. 5, the connection front end member 30 may be formed so as to be joined to the upper flange 10 by arranging the n-shaped members at regular intervals in the longitudinal direction of the lower flange 20.

That is, the connection front end member 30 includes a pair of horizontal portions 31 formed by bending a wire material and formed in parallel, side portions 32 and side portions 32 extending downward from the horizontal portion 31 in a horizontal direction And a connection portion 33 for connection.

At this time, the side portion 32 may extend vertically downward or may be inclined so as to extend inward or outward with respect to the pair of horizontal portions 31.

The connection front end member 30 formed in the n-shape is configured such that the lower portion of the side portion 32 is bonded to a predetermined position of the lower flange 20 at regular intervals in the longitudinal direction of the lower flange 20, The upper flange 10 may be seated on the upper portion of the horizontal portion 31 of the connection front end member 30 and joined by various methods known in the art such as welding or the upper flange 10 may be joined to the connection front end member 30) and can be joined by various methods known in the art such as welding.

Fig. 7 is a perspective view of another embodiment of Fig. 6 (a).

7, when the upper flange 10 has an n-shaped cross section, a coupling hole 19 having a predetermined size is formed at a predetermined interval at the lower end of the side plate 12, So that the n-type connecting shear members 30 are fitted and joined so as to be seated, so that the joining positions of the connecting shear members 30 can be easily designated.

8 is a perspective view and a cross-sectional view of an embodiment in which an H-shaped end joint material is joined to a column U-shaped lattice composite of the present invention.

As shown in Fig. 8, the top U-shaped lattice composite sheet 1 of the present invention is configured such that the H-shaped end joining members 50 each having an H-shaped cross-section at the longitudinal end portions thereof are configured to facilitate joining And the H-shaped end joining member 50 having various heights can be formed at the end portion without increasing the dancing of the top U-shaped lattice composite ball 1.

The H-shaped end joining member 50 is constituted by an upper plate 51, a lower plate 52 and a web 53 connecting a widthwise central portion of the upper plate 51 and the lower plate 52, , And an existing H-shaped steel can be used.

At this time, in the longitudinal direction both ends of the upper flange 10 and the lower flange 20, the central portions in the width direction of the horizontal plates 11 and 21 are located in the longitudinal direction inner side So that the web 53 of the H-shaped end joining member 50 is fitted into the cutouts 115 and 215 so that the cutouts 115 and 215 are formed by a known method such as welding It can be bonded.

FIG. 9 is a perspective view and a cross-sectional view of an embodiment in which a cover-type end joint member is coupled to a column U-shaped lattice composite of the present invention.

In addition, the top U-shaped lattice composite sheet 1 of the present invention is configured such that the lid-shaped end joining members 60 each having an H-shaped cross section at the longitudinal end portions thereof are made to be easily joined at the time of joining to the columns It is possible to solve the problems such as shear deformation and occurrence of buckling with respect to a large compressive force by forming a double structure with the upper flange 10 at the end of the top U-shaped lattice composite bulb 1.

The lid-type end joining member 60 is composed of a horizontal top plate 61 and a lid having an n-shaped cross-section, which is composed of a vertical side plate 62 extending vertically downward from both sides in the width direction of the horizontal top plate 61 The horizontal upper plate 61 overlaps with the upper plate 11 of the upper flange 10 and is formed in two layers at a predetermined interval inwardly from both longitudinal ends of the lower flange 20 so that the vertical side plate 61 So that the lower flange 20 and the side plate 22 coincide with each other.

10 is a perspective view of another embodiment of FIG.

In particular, as shown in FIG. 10, the cover-type end joining member 60 may be formed at a predetermined position in the longitudinally central portion of the upper flange 10, or at least one So that it can serve as a band for reinforcing the center portion in the longitudinal direction.

11 is a cross-sectional view of an embodiment in which a compression reinforcement member is provided in the column U-shaped lattice composite of the present invention.

11, inner side or outer side of the side plate 12 of the upper flange 10 is connected to the side compression reinforcing member 40 in the longitudinal direction by welding or the like so that the upper flange 10 The cross section can be reinforced. The connection front end member 30 may be coupled to both sides of the upper flange 10 by means of welding or the like when the connection front end member 30 is coupled to the side surface of the upper flange 10 30 by welding or the like.

The above-mentioned U-shaped lattice composite of the present invention as described above constitutes the u-shaped upper flange at the upper part and corresponds to the longitudinal moment generated at the construction step when it is used as a beam member. It is possible to increase the compressive force and the buckling strength and to use the bending strength of the section without reducing by buckling as well as the vertical torsional resistance against the horizontal force or the asymmetric load during the construction. A part of the beam section can be buried in a slab, thereby reducing the thickness of the beam.

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: Top U-shaped Lattice Composite Beam
10: Upper flange
11: Horizontal plate
12: side plate
13: reinforced plate
19:
20: Lower flange
21: Horizontal plate
22: side plate
23: Mounting plate
30: connection front end member
31:
32:
33: Connection
50: H-shaped end joint member
60: lid-shaped end joining member

Claims (10)

An upper flange 10 having a horizontal plate 11 and a side plate 12 extending upward or downward at both ends in the width direction of the horizontal plate 11 and having a u-shaped or n-shaped cross-section;
A side plate 22 extending upward from both end portions in the width direction of the horizontal plate 21 and a mounting plate 23 extending inward or outward in the width direction at the upper end of the side plate 22 A lower flange 20 formed at a predetermined distance from the lower portion of the upper flange 10;
And a connection front end member (30) coupled to connect the upper flange (10) and the lower flange (20). The method according to claim 1,
Wherein the horizontal plate (11) is formed with a shear connection hole (111) formed at regular intervals through the top plate (11). The method according to claim 1,
Wherein the upper flange (10) is formed with a reinforcing plate (13) extending inwardly in the width direction at the end of the side plate (12). The method according to claim 1,
The connecting shear member 30 may be formed by forming a single inclined member at regular intervals so as to connect the upper flange 10 and the lower flange 20 or by connecting the unit bent ribs repeatedly formed by repeating a predetermined angle And the upper flange (10) and the lower flange (20) are connected to each other. The method according to claim 1,
The connection front end member 30 includes a pair of horizontal portions 31 formed by bending the wire and formed in parallel with the horizontal portion 31 and a side portion 32 and side portions 32 extending downward from the horizontal portion 31 horizontally And a connecting portion 33,
The lower portion of the side portion 32 is joined to the lower flange 20 at regular intervals in the longitudinal direction of the lower flange 20,
Characterized in that the upper flange (10) is seated on the upper part of the horizontal part (31) of the connection front end member (30) or is coupled to the lower part of the horizontal part (31). The method of claim 5,
The upper flange 10 has an n-shaped cross section, and a coupling hole 19 having a predetermined size is formed at a lower end of the side plate 12 at regular intervals,
And the connection front end member (30) is fitted and joined to the coupling port (19) so as to be seated. The method according to claim 1,
The central portions in the widthwise direction of the horizontal plates 11 and 21 are cut to a predetermined length inwardly in the longitudinal direction at both longitudinal ends of the upper flange 10 and the lower flange 20 to form cutouts 115 and 215 ,
An H-shaped end joining member 50 having an H-shaped cross section and composed of an upper plate 51, a lower plate 52 and a web 53 connecting the upper plate 51 and the middle portion in the width direction of the lower plate 52, 53) are fitted and joined to the cut-out portions (115, 215). The method according to claim 1,
A cover type end joining member 60 having an n-type cross section and composed of a horizontal top plate 61 and a vertical side plate 62 extending vertically downward from both widthwise sides of the horizontal top plate 61
The horizontal upper plate 61 overlaps with the upper plate 11 of the upper flange 10 and is formed in two layers at a predetermined interval inwardly from both longitudinal ends of the lower flange 20, So that the flange (20) and the side plate (22) coincide with each other. The method according to claim 1,
Wherein at least one lid-type end joining member (60) is formed at a predetermined position or at a predetermined interval in a longitudinally central portion of the upper flange (10). The method of claim 9,
And a side compression reinforcing member (40) is formed on both sides in the width direction of the upper flange (10) in the longitudinal direction.

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