KR101406583B1 - U-shaped composite beam - Google Patents

Abstract

The present invention can improve the workability and structural performance of joints between pillars and small beams by using composite beams with u-shaped cross-section while using bracket-type beams. Shaped composite beam combined with an H-shaped cross-section beam capable of reducing the height and thickness of the composite beam.
In a preferred embodiment of the present invention, the upper flange plate, the side flange plate extending perpendicularly at both ends of the lower flange plate, the upper flange plate extending inwardly in parallel with the lower flange plate at one end of the side flange plate, A U-shaped cross section having a U-shaped cross-sectional shape and having a predetermined length; An end plate having a plate-like width equal to the width of the cross section of the U-shaped plate and formed to have a height longer than the height of the cross section and being further projected downward than an end face of the U-shaped plate so as to cover both ends of the U- An H-shaped cross-section beam having an upper flange plate and a lower flange plate formed on upper and lower portions of the bumper plate and having one end coupled to the end plate; A plate-shaped upper stiffener coupled to connect the side portions of the H-shaped cross-beam upper flange plate at the upper outer side of the end plate of the same height as the U-shaped upper plate; Shaped lower stiffener coupled to the side end of the lower end flange plate of the H-shaped section beam at the lower end outer surface of the end plate to connect the side portion of the lower flange plate; A plate-shaped central stapler coupled to both side portions of the H-shaped section reinforcing plate at an outer end of the end plate of the same height as the U-shaped lower flange plate; And concrete that fills the interior of the U shape.

Description

U-shaped composite beam with H-shaped cross-

[0001] The present invention relates to a grooved composite beam combined with an H-shaped cross-section beam, and more particularly, to a composite beam having a U-shaped cross section at the time of joining with a column, Type composite beam combined with H-shaped cross-section beams capable of reducing the height of the joint while improving the workability and structural performance of the joining portion with the column and the small beam.

The steel structure (or steel structure) is widely used in buildings requiring large-scale spaces such as high-rise buildings, hangars, gymnasiums, airports, factories, etc. from a mild building such as a warehouse as a typical structure method of modern architecture together with a reinforced concrete structure. Depending on the size and usage of the steel structure, various structural types are used, and the absence of use and the method of joining are different. Representative examples of the steel structure include a skeletal structure, a truss structure, an acidic ramen structure, a steel pipe structure, and a lightweight steel structure.

The skeleton structure (frame) of a steel structure is a method of making a grid-like frame composed of a column and a beam using various sections. A floor plate or number evaluation bird is used as a reinforcement element for the lateral force, and the shear wall is appropriately placed as required. The skeleton structure is widely used not only for high-rise buildings but also for buildings below the middle floor due to the advantages of structural clarity and simplicity of construction.

Structural members that make up the frame structure of the steel structure include columns, beams, and bottom plates. Types of beams include shape beams, composite beams, lattice beams, honeycomb beams, and composite beams combined with concrete.

As a background of the present invention, there is a patent registration No. 0617878 entitled " a molded steel plate concrete beam "(patent document 1). In the background art, as shown in FIG. 6, a U-shaped permanent die 1b formed by welding (9) the two c-type steel plates 2; The U-shaped permanent mold 1b is composed of an upper flange 12, a lower flange 11 and a web plate 13; The upper flange attaching the shear connector 14 to be integral with the slab concrete 15; And the Y-shaped protrusions 10 of the lower flange 11 are formed in a central shape so as to increase the cross-sectional area of the lower flange and to increase the effect of the composite of the concrete poured therein and to insert the concrete into the U- So as to be integrated with an external permanent mold plate.

However, the above-mentioned background art has a problem in that it is difficult to manufacture due to the complicated shape and many processes such as bending, cutting and welding at the time of fabrication because the two c-type steel plates 2 are welded (9) The column-to-beam bonding method is different from the conventional steel-to-steel bonding method, and conventional conventional steel-to-plate bonding methods such as conventional bracket-type bolting can not be used.

Another background art of the present invention is a utility model registration No. 0420294 entitled "Asymmetric H. Beam" (Patent Document 2). 7, in the asymmetric H beam in which the widths of the upper and lower flanges are different from each other, and the web is formed vertically between the upper and lower flanges, And at least one through hole is formed so as to be able to penetrate the asymmetric H. Beam.

However, in the background art, since the upper flange is formed over the entire length of the web even in the section in which the moment is applied, the steel is consumed in a large amount, resulting in not only an excessive production cost but also an increase in the total weight of the beam , Because the cross-sectional shape is complicated because the through hole is formed in the web for the synthetic effect, there is a problem in that the manufacturing cost is increased due to a lot of processes such as cutting at the time of production, which causes an increase in the construction cost.

As another background of the present invention, there is a patent registration No. 0851490 entitled " Steel Structure Composite Structure for Floor Height Reduction "(Patent Document 3). 8, among the I-shaped steel bars 10 and 20 made of the webs 11 and 21, the upper flanges 12 and 22 and the lower flanges 13 and 23, the lower flanges 13 and 23 Is made larger than the upper flanges 12 and 22 and is arranged at a central portion of the webs 11 and 21 so as to be spaced apart from both the upper flanges 12 and 22 and the lower flanges 13 and 23 at regular intervals The web holes 14 and 24 are formed at both ends of the lower flanges 13 and 23. The bracket support plates 15 and 25 extend along the longitudinal direction of the steel beams 10 and 20, A slab concrete (17) is placed on a deck plate (16) installed on a support plate (25); The web holes 14 and 24 are formed in a trapezoidal shape having a narrow upper side and a wide bottom side and the bracket supporting plates 15 and 25 are connected to both ends of the lower flanges 13 and 23 by linear welding, Is integrally formed with the flanges (13, 23); When the U-beam 10 and the small beam 20 are connected at a predetermined angle, the steel beams 10 and 20 are divided into a small U-shaped beam 10 and a small small beam 20, A brazed support plate 25 of the beam 20 is installed on the brace support plate 15 of the U-shaped beam 10; The web hole 14 of the U-shaped beam 10 is connected to the upper surface of the L-shaped support plate 25 of the small beam 20 and the L-shaped support plate 25 of the U-shaped beam 10 so that the duct 14a can pass therethrough. 15) of the steel composite beam structure.

However, since the above-described background technology has the upper flanges 12 and 22 formed over the entire length of the webs 11 and 21, the steel products are consumed in a large amount so that the production cost is excessively increased, 21, since the web holes 14, 24 are formed, the shape of the cross section is complicated, and there are a lot of processes such as cutting at the time of fabrication, 10, since the U-shaped beam 10 and the small beam 20 have different sectional shapes and different dances, the column-to-beam bonding method differs from the conventional bonding method of the steel structure, Type joining method can not be used.

Patent No. 0617878 Registered Utility Model No. 0420294 Patent No. 0851490

The present invention can be manufactured simply by bending a single steel plate at a room temperature, thereby reducing manufacturing cost and making it possible to form a U-shaped beam having a smaller width and a wider width than an H-shaped steel used as a connection bracket of a column It is possible to achieve the effect of reducing the floor height and the H-shaped section beam having the same cross section as the H-section steel used as the connection bracket of the column at the both ends of the U-shaped beam is constituted so that the connection with the column, regardless of the sectional shape of the U- It is possible to apply the visibility type of existing steel structures such as visibility type of brackets, and it is possible to provide the composite type composite with the joining of H - shaped section beams, do.

The first embodiment of the present invention comprises a lower flange plate, a side bumper plate extending at right angles to both ends of the lower flange plate, a top plate extending inwardly in parallel with the bottom flange plate at one end of the side flange plate, A U-shaped cross section having a U-shaped cross-sectional shape and having a predetermined length; An end plate having a plate-like width equal to the width of the cross section of the U-shaped plate and formed to have a height longer than the height of the cross section and being further projected downward than an end face of the U-shaped plate so as to cover both ends of the U- An H-shaped cross-section beam having an upper flange plate and a lower flange plate formed on upper and lower portions of the bumper plate and having one end coupled to the end plate; A plate-shaped upper stiffener coupled to connect the side portions of the H-shaped cross-beam upper flange plate at the upper outer side of the end plate of the same height as the U-shaped upper plate; Shaped lower stiffener coupled to the side end of the lower end flange plate of the H-shaped section beam at the lower end outer surface of the end plate to connect the side portion of the lower flange plate; A plate-shaped central stapler coupled to both side portions of the H-shaped section reinforcing plate at an outer end of the end plate of the same height as the U-shaped lower flange plate; And a concrete filled in the inside of the U-shaped girder.

Also, the center stiffener is formed to be inclined downward in the H-shaped cross-section beam direction from the end plate.

The U-shaped lower flange plate may further include a plate-shaped vertical stiffener vertically coupled to a lower portion of the U-shaped plate at a central portion in the width direction so as to connect the lower surface of the U- We want to provide composite data.

The upper stiffener and the lower stiffener are formed in a triangular shape so that the orthogonal sides of the upper stiffener and the lower stiffener are coupled to the side surfaces of the end plate, the upper flange plate, or the lower flange plate, respectively. ≪ / RTI >

The cavity-holding member may be formed of any one of a reinforcing bar, a plate-like plate, an angle having an L-shaped cross section, a channel having a C-shaped cross section, and a Z- We want to provide composite data.

The second embodiment of the present invention also includes a lower flange plate, a side bumper plate extending perpendicularly at both ends of the lower flange plate, a top plate extending inwardly in parallel with the lower flange plate at one end of the side flange plate, A U-shaped beam having a U-shaped cross-sectional shape having a predetermined length and formed of a spacing member which is connected at constant intervals over an entire length to mutually connect upper ends; An end plate having a plate-like width equal to the width of the cross section of the U-shaped plate and formed to have a height longer than the height of the cross section and being further projected downward than an end face of the U-shaped plate so as to cover both ends of the U- And an upper flange plate and a lower flange plate are respectively formed on upper and lower portions of the bumper plate so that one end is coupled to the end plate and one end coupled to the end plate has the same height as the cross section of the U- And an H-shaped cross-section beam which is formed such that the lower flange plate is inclined so that the bottom length of the cross-section of the bob plate progressively increases toward the other end; A plate-shaped upper stiffener coupled to connect the side portions of the H-shaped cross-beam upper flange plate at the upper outer side of the end plate of the same height as the U-shaped upper plate; Shaped lower stiffener coupled to the side end of the lower end flange plate of the H-shaped section beam at the lower end outer surface of the end plate to connect the side portion of the lower flange plate; And a concrete filled in the inside of the U-shaped beam.

The cavity-holding member may be formed of any one of a reinforcing bar, a plate-like plate, an angle having an L-shaped cross section, a channel having a C-shaped cross section, and a Z- We want to provide composite data.

The U-shaped composite view combined with the H-shaped section beams of the present invention can be manufactured simply by bending a single steel plate at room temperature, thereby reducing the production cost. The U-shaped beam is more durable than the H- The U-shaped beam having the same section as the H-shaped beam used as the connecting bracket of the column at both ends of the U-shaped beam, It is possible to apply the existing shape of the existing steel structure, such as bracket type, when connecting with the column, regardless of the sectional shape of the column. Therefore, it is possible to easily construct the joint with the column, to secure the structural stability, have.

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.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a first embodiment of a meniscus composite beam combined with an H-shaped cross section of the present invention. Fig.
FIGS. 2A to 2D are side views showing a state in which the composite beam of FIG. 1 is coupled with a column.
FIG. 3A is a cross-sectional view taken along line AA and BB in FIG. 2B.
FIG. 3B is a cross-sectional view along CC and DD lines in FIG. 2D.
Fig. 4 is a side view showing a state in which a male type composite beam with an H-shaped cross section according to the present invention is combined with a column in a second embodiment. Fig.
5 is a cross-sectional view taken along line EE and FF in Fig.
Fig. 6 is a perspective view showing a steel plate concrete beam as one of the background art of the present invention.
7 is a perspective view showing an asymmetric H Beam, which is another background art of the present invention.
FIG. 8 is a perspective view illustrating a steel composite beam structure for reducing floor height, which is another background art 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 U-shaped composite beam 1 (1a) having the U-shaped beam 10a of the U-shaped beam 10a and the U-shaped beam 10a of the U- End plates 20 and 20a and H-shaped cross-section beams 30 and 30a having one end joined to the end plates 20 and 20a and having an H-shaped cross section, and the U-shaped beams 10 and 10a, The concrete 2 is filled.

At this time, the upper and lower stiffeners 40 and 40a and the lower stiffeners 50 and 50a are formed at the upper and lower ends of the end plates 20 and 20a and the H-shaped cross beams 30 and 30a, respectively.

The difference between the first embodiment and the second embodiment of the present invention is that the first embodiment differs from the second embodiment in that the outer end of the end plate 20 which is flush with the lower flange plate 11 of the U- In the case of the second embodiment, the bottom length of the end face of the bend plate 31a gradually increases from the end plate 20a toward the other side, so that the lower flange plate 33a are inclined so that the H-shaped cross section beam 30a is formed to have a cross section.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a first embodiment of a meniscus composite beam combined with an H-shaped cross section of the present invention. Fig.

As shown in Fig. 1, the U-shaped composite beam 1 of the first embodiment of the present invention has U-shaped beams 10 having U-shaped cross sections and U- And an H-shaped cross section beam 30 having one end joined to the end plate 20 and having an H-shaped cross section, and the end plate 20 and the upper end of the H-shaped cross section beam 30, The upper stiffener 40, the lower stiffener 50 and the central stiffener 60 are respectively formed at the lower end and the central portion and the concrete 2 is filled in the U-shaped beam 10.

FIG. 3A is a cross-sectional view taken along line AA and BB in FIG. 2B, FIG. 3B is a cross-sectional view taken along line CC and DD in FIG. 2D, Fig.

Shaped composite beam 1 to which the H-shaped cross-section beam of the present invention is coupled is composed of an H-shaped cross-section beam 30 having the same cross section as the H-shaped cross section of the U- So as to connect the connection bracket 4 and the H-shaped section beam 30 having the same cross section at the time of engagement with the column 3 regardless of the cross-sectional shape of the U-shaped beam 10, (3) can be applied easily and the structural stability can be ensured.

As shown in FIG. 2A, the U-shaped beam 10 has a generally U-shaped cross-sectional shape, and on the upper surface thereof, spacing members 14 are provided at regular intervals over the entire length.

The U-shaped beam 10 is formed by bending an iron plate at room temperature. An H-shaped cross-section beam 30 is formed at both ends for efficient use of the cross section and easy joining to the column, The combined male-type composite beam (1) is configured such that the shape of the central portion, which is the moment section and the shape of the end portion, which is the root section, are different from each other.

Concrete is filled in the space surrounded by the inside of the U-shaped beam 10, that is, the lower flange plate 11 and the side bending plates 12 and 12. When the shape is maintained and the concrete is poured, A gap holding member 14 is provided to prevent the gap from being opened. The spacing members 14 are provided so as to connect the top plates 13 and 13 to each other in a direction perpendicular to the longitudinal direction of the U-shaped beam 10 at regular intervals over the entire length of the U- Although the figure shows an example in which an L-shaped steel (angle) is used as the gap retaining member 14, the present invention is not limited thereto and may be a member having strength capable of preventing the side wall plates 12 and 12 from spreading. , A plate-like plate, an angle having an L-shaped cross section, a channel having a C-shaped cross section, and a Z-shaped cross section having a Z-shaped cross section. On the other hand, the gap retaining member 14 also functions as a shear connection member for guiding the shape, preventing the sideward baffle plates 12 (12) from spreading as well as composing the slab concrete as a different material and the U-beam 10.

The U-beam 10 is constituted by a lower flange plate 11, side-face baffle plates 12 and 12 and upper plates 13 and 13, And the upper plates 13 and 13 are configured to extend inwardly from one end of the side bumper plates 12 and 12 in parallel with the lower flange plate 11. [

The end plate 20 is coupled to both end portions of the U-shaped beam 10 so as to form a closed end surface except for the upper portion of the U-shaped beam 10 to facilitate filling of the concrete 2 in the U- So that the H-shaped cross section beam 30 can be easily engaged with both end portions of the U-shaped beam 10.

The end plate 20 has a plate shape and a width equal to the width of the U-shaped beam 10, and is formed to have a height greater than the height of the end face. The U-beam 10 is formed to have a wide width, and the height of the dancing can be lowered to reduce the thickness. Therefore, the width is wider and the dancing is shorter than the H-shaped steel used as the connection bracket to be connected to the column. In order to facilitate coupling with the H-shaped cross section beam 30 having the same cross section as the connection bracket, the width of the U-shaped cross section 10, which is wider than the width of the U- Shaped cross-section beam 30 that is higher than the cross-section dancing of the U-shaped beam 10. At this time, the end plate 20 is engaged with the U-shaped beam 10 so as to protrude further downward than the end face of the U-shaped beam 10 by aligning the upper end with the U-shaped beam 10.

One end of the H-shaped section beam 30 is coupled to the end plate 20. The upper end flange plate 32 and the lower flange plate 33 are respectively formed on the upper and lower portions of the bumper plate 31 and the central bumper plate 31 so as to have an H-shaped cross section. That is, when the H-shaped beam 30 is formed to have the same cross-section as the H-shaped beam used as the connection bracket of the column, the bracket- To be applied as it is.

Since the U-shaped beam 10 and the H-shaped beam 30 are different in width and dancing from each other, the U-shaped beam 10 and the H-shaped beam 30 can be formed by forming the separate stiffeners 40, 50, So that a sharp change in the cross-sectional size is reduced at the connection portion of the cross-section beam 30 and the connection portion is reinforced.

Since the U-shaped beam 10 and the H-shaped section beam 30 can not be directly connected, the end plate 20 and the H-shaped section beam 30 are directly coupled to each other. (40), a lower stiffener (50) and a central stiffener (60) are formed.

The upper stiffener 40 is coupled to connect the side portions of the upper flange plate 32 of the H-shaped section beam 30 at the upper outer side of the end plate 20 having the same height as the upper plate 13 of the U- , The lower stiffener 50 is engaged to connect the side portion of the lower flange plate 33 of the H-shaped cross section beam 30 at the lower end outer surface of the end plate 20. [

At this time, the upper stiffener 40 and the lower stiffener 50 may be formed in various shapes, but they may be formed in a triangle shape, and the sides at right angles may be respectively formed with the end plate 20, the upper flange plate 32, To be coupled to the side surface of the connecting portion 33 so as to facilitate transmission of the stress at the connecting portion.

The central stiffener 60 is coupled to connect the outer side surface of the end plate 20 having the same height as the lower flange plate 11 of the U-beam 10 and both side portions of the bob plate 31 of the H- That is, the central stiffener 60 is constructed such that the two plates are coupled to both sides of the bobbin plate 31 and the both side portions of the bobbin plate 31 and the end plate 20 Lt; / RTI >

As shown in FIGS. 2A and 2B, the central stiffener 60 may be horizontally coupled or inclined downward in the direction of the H-shaped cross section beam 30 from the end plate 20, as shown in FIGS. 2C and 2D, It is possible to reduce abrupt changes in the size of the cross section of the composite beam 1 and to facilitate transmission of the stress.

2b and 2d, the lower end of the U-shaped beam 10 is connected to the lower end of the U-shaped beam 10 so as to connect the lower face of the lower flange plate 11 and the end plate 20, A vertical stiffener 70 in the form of a plate may be additionally provided so as to reinforce the engagement between the U-shaped beam 10 and the end plate 20. [

FIG. 4 is a side view showing a state in which a male type composite beam with an H-shaped cross section according to the present invention is combined with a column of a second embodiment, and FIG. 5 is a sectional view taken along line E-E and F-F of FIG.

As shown in Fig. 4, the male-type composite beam 1a having the H-shaped cross-section beam of the present invention has the same cross-section as the H-shaped steel used as the connection bracket 4 of the column 3 at both ends of the U- The H-shaped cross section beam 30a is constructed so as to connect the connection bracket 4 and the H-shaped cross section beam 30a having the same cross section when engaged with the column 3 regardless of the cross-sectional shape of the U-shaped cross section 10a Therefore, it is possible to apply the existing shape of the existing steel structure, such as bracket type view, as it is, so that it is easy to construct the joint with the column (3) and the structural stability can be secured. Particularly, the H-shaped cross section beam 30a is formed such that the lower length of the cross section of the bending plate 31a gradually increases from the end plate 20a toward the other end side so that the lower flange plate 33a is inclined, Are formed so as to have a cross-section.

4, the H-shaped cross section beam 30a and the connecting bracket 4 may have a cross section so as to be inclined with respect to the lower flange plate. Although not shown, the connecting bracket 4 may be a general H- To be combined with each other.

The U-shaped composite beam 1a to which the H-shaped cross-section beam of the second embodiment of the present invention is coupled includes a U-shaped beam 10a having a U-shaped cross section and an end plate 20a coupled to the opposite ends of the U- And an H-shaped cross section beam 30a whose one end is coupled to the end plate 20a and which has an H-shaped cross section. The upper end portion, the lower end portion and the central portion of the end plate 20a and the H- A stiffener 40a and a lower stiffener 50a are constructed and the inside of the U-shaped beam 10 is filled with concrete 2.

That is, the second embodiment of the present invention is configured such that the central portion stiffener 60 is omitted in the structure of the first embodiment, and the H-shaped section beam 30a is formed to have a cross section.

Therefore, the description of the U-shaped beam 10a and the end plate 20a which are the same as those of the first embodiment will be omitted.

As shown in FIGS. 4 and 5, the H-shaped cross section beam 30a is formed to have a stepped section. The bottom length of the cross section of the bend plate 31a gradually increases from the end plate 20a toward the other side, The upper flange plate 32a and the lower flange plate 33a are not parallel but the upper flange plate 32a is formed horizontally and the lower flange plate 33a is inclined. That is, the dancing of one end of the H-shaped section beam 30a is the same as the dancing of the U-shaped beam 10a, and the dancing of the other end is formed so as to be the same as the dancing of the connection bracket coupled with the column, . However, since the U-shaped beam 10a and the H-shaped beam 30a are different in width from each other, the U-shaped beam 10a and the H-shaped beam can be formed by forming separate stiffeners 40a and 50a, 30a to reduce the rapid change in cross-sectional size and to reinforce the connection.

The end plate 20a and the H-shaped cross section beam 30a are directly coupled with each other because the U-shaped beam 10a and the H-shaped cross section beam 30a can not be directly connected to each other. And a lower stiffener 50a are formed.

The upper stiffener 40a is coupled so as to connect the side portions of the upper flange plate 32a of the H-shaped section beam 30a at the upper outer side of the end plate 20a having the same height as the upper plate 13a of the U- , The lower stiffener 50a is coupled to connect the side portion of the lower flange plate 33a of the H-shaped section beam 30a at the lower end outer surface of the end plate 20a.

At this time, the upper stiffener 40a and the lower stiffener 50a may be formed in various shapes, but they may be formed in a triangle shape, and the sides at right angles may be formed of the end plate 20a, the upper flange plate 32a, To be coupled to the side surface of the connecting portion 33a so as to facilitate transmission of the stress at the connecting portion.

The U-shaped composite beam having the H-shaped cross section according to the present invention can be manufactured simply by bending a single steel sheet at room temperature, thereby reducing the manufacturing cost. The U-shaped beam is more durable than the H- And an H-shaped section beam having the same cross section as the H-section steel used as the connection bracket of the column is formed at both ends of the U-shaped beam, so that the U It is possible to apply the existing view type of steel structure, such as bracket type view, when connecting with columns, regardless of the cross-sectional shape of the bridge. Therefore, it is easy to construct the joint with the column, .

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, 1a: Y-shaped composite beam combined with H-shaped cross-section beams
2: Concrete
3: Column
4: Connection bracket
10: U shape
11: Lower flange plate
12:
13:
14:
20: End plate
30: H-section beam
31:
32: upper flange plate
33: Lower flange plate
40: upper stiffener
50: Lower stiffener
60: central stiffener
70: Vertical stiffener

Claims (7)

The side flange plate 11 and the side flange plates 12 and 12 extending at right angles to both ends of the lower flange plate 11 and the side flange plates 12 and 12 And a spacing member 14 which is connected at regular intervals over the entire length to connect the upper ends of the top plates 13 and 13 to each other, A U-shaped beam 10 having a cross-sectional shape;
Shaped beam 10 having a width equal to the width of the end face of the U-shaped beam 10 and being longer than the height of the end face so as to protrude further downward than the end face of the U- Respectively;
An upper flange plate 32 and a lower flange plate 33 are formed on upper and lower portions of the bumper plate 31 so as to have an H-shaped cross section, A cross section beam (30);
Shaped upper stiffener 40 which is coupled to connect the side surface portion of the upper flange plate 32 to the upper end surface of the end plate 20 of the same height as the upper plate 13 of the U- )Wow;
A plate-shaped lower stiffener 50 coupled to connect the side portion of the lower flange plate 33 of the H-shaped cross section beam 30 at the lower end outer surface of the end plate 20;
Shaped central stiffener 60 coupled to connect the outer side surface of the end plate 20 having the same height as the lower flange plate 11 to both side portions of the H-shaped cross-section beam 30, ;
And a concrete (2) filled in the U-shaped beam (10). The method according to claim 1,
And the central stiffener (60) is formed to be inclined downward in the direction of the H-shaped cross section beam (30) from the end plate (20). The method according to claim 1 or 2,
A U-shaped beam 10 is further provided with a plate-shaped vertical stiffener 70 vertically coupled to a lower portion of the U-shaped beam 10 to connect the lower surface of the lower flange plate 11 and the end plate 20 to the widthwise central portion. Wherein the H-shaped cross-section beams are combined with each other. The method according to claim 1,
The upper stiffener 40 and the lower stiffener 50,
Shaped cross section is combined with the end flange plate (32) or the side surface of the lower flange plate (33), respectively. . The method according to claim 1,
The gap holding member 14 is made of any one of a reinforcing bar, a plate-like plate, an angle having an L-shaped cross section, a channel having a C-shaped cross section, and a Z- Shaped composite. The side flange plates 11a and the side flange plates 12a and 12a extending at right angles at both ends of the lower flange plate 11a and the side flange plates 12a and 12a are arranged in parallel with the lower flange plate 11a And a spacing member (14a) joined at regular intervals over the entire length to interconnect the upper ends of the top plates (13a, 13a) with the extended top plates (13a, 13a) A U-shaped beam 10a;
An end plate 20a coupled to each of the opposite ends of the U-shaped beam 10a;
An upper flange plate 32a and a lower flange plate 33a are formed at upper and lower portions of the bumper plate 31a so that one end is coupled to the end plate 20a, One end of the flange plate 33a coupled to the plate 20a is configured to have the same height as that of the U-shaped beam 10a and the lower length of the end face of the bend plate 31a gradually increases toward the other end, H-shaped cross section beam 30a which is configured to be formed so as to be inclined;
Shaped upper stiffeners 40a (40a) coupled to the upper flange plate (32a) so as to connect the side portions of the upper flange plate (32a) at the upper end outer surface of the end plate (20a) )Wow;
A plate-shaped lower stiffener 50a coupled to connect the side portion of the lower flange plate 33a of the H-shaped section beam 30a at the lower end outer surface of the end plate 20a;
And a concrete (2a) filled in the U-shaped beam (10a). The method of claim 6,
The gap holding member 14a may be any one of a reinforcing bar, a plate-like plate, an angle having an L-shaped cross section, a channel having a C-shaped cross section, and a Z- Shaped composite.

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