KR101449387B1

KR101449387B1 - composite beam assembly

Info

Publication number: KR101449387B1
Application number: KR1020140100221A
Authority: KR
Inventors: 강병구
Original assignee: 강병구
Priority date: 2014-08-05
Filing date: 2014-08-05
Publication date: 2014-10-13

Abstract

A purpose of the present invention is to provide an assembly-type multistage composite beam which can variously transform a cross section and the thickness of the composite beam. Comprised are a first composite beam unit forming a lower part of the composite beam; a pair of first web plate including a second composite beam unit coupled in an upper side of the first composite beam unit which is equipped with a first upper flange and a first lower flange, and arranged to be apart from each other to be a side plate of the composite beam; a lower plate where both ends are arranged in a lower side of a first lower flange, in a lower side of the first web plates; and a first coupling bolt and a first coupling nut which couple the first lower flange and the lower plate.

Description

Composite beam assembly}

The present invention relates to a composite beam, and more particularly to a composite multi-stage composite beam.

The synthetic bowls currently used in domestic and foreign countries are almost dependent on cold forming. This method is a method of producing a product by putting a coil wound around the main use material in a molding machine, which is widely used in order to minimize the loss of the material and to achieve rapid production.

However, this method uses a non-standard size material rather than a product of a standardized size, which leads to an increase in production cost and financial cost due to an increase in cost due to stock acquisition, excessive investment of the machine, and the like.

Also, most of the products have the exclusive production right for the above reasons, and the price of the product is relatively high due to the application of the profit without the competition.

In addition, there is a limitation in the production of the products from the conventional single molding machine, so that it is a reality that the delivery time is very difficult to observe when several sites simultaneously place an order, and it is a reality that the buyer sees the producer's opinion.

In addition, although the conventional cold-formed product is used by welding, a distortion of the plate during cold forming may occur, and it is difficult to produce various products when welding is used. In addition, there is a problem that it is difficult to meet the limitation on the width-to-thickness ratio of the compressive steel elements subjected to warping when the conventional welded composite beams are used for large beams.

Korean Registered Patent No. 1404515 (Apr. 201, 201), "3-Piece Hybrid Beam and Its Fabrication Method" Korean Registered Patent No. 1186267 (2012. 09.20), "Hybrid Composite"

It is an object of the present invention to provide a prefabricated multi-stage composite beam capable of variously modifying the cross-section and thickness of a composite beam.

In order to accomplish the above object, according to an embodiment of the present invention, And a second composite beam unit coupled with the upper side of the first composite beam unit, wherein the first composite beam unit includes a first upper flange horizontally bent at an upper end and a first lower flange horizontally bent at a lower end, A pair of first web plates spaced apart from each other to form a side plate of the composite beam and a pair of lower web plates arranged on the lower side of the first web plates to be a bottom plate of the composite beam, A first fastening bolt and a first fastening nut passing through a plurality of through holes respectively formed in the first lower flange and the lower plate and fastening the first lower flange and the lower plate, , The second composite beam unit is provided with a second upper flange horizontally bent at the upper end and a second lower flange bent horizontally at the lower end, A pair of second web plates arranged to be spaced apart from each other in a lock state and a plurality of through holes formed respectively in the second lower flange and the first upper flange to fasten the second lower flange and the first upper flange A second fastening bolt and a second fastening nut.

Here, between the first lower flange and the lower plate, a pair of tensile reinforcement plates corresponding to the shape of the first lower flange may be further included in the longitudinal direction.

In addition, the head of the first fastening bolt faces downward, the first fastening nut engages with the first fastening bolt on the upper side, the head of the second fastening bolt faces downward, and the second fastening nut is on the upper side The second fastening bolt can be engaged with the second fastening bolt.

Further, one of the first upper flanges is bent toward the outside of the composite beam, the other is bent toward the inside of the composite beam, one of the first lower flanges is bent toward the outside of the composite beam, One of the second upper flanges is bent toward the outside of the composite beam and the other is bent toward the inside of the composite beam and one of the second lower flanges is bent toward the outside of the composite beam, One is bent toward the inside of the composite beam, and the lower plate is provided with a plurality of stud bolts.

In addition, the first upper flange is bent toward the outside of the composite beam, the first lower flange is bent toward the outside of the composite beam, the second upper flange is bent toward the outside of the composite beam, The lower flange is bent toward the outside of each of the composite beams, and the lower plate is provided with a plurality of stud bolts.

Further, the first upper flange is bent toward the outside of the composite beam, the first lower flange is bent toward the inside of the composite beam, the second upper flange is bent toward the outside of the composite beam, The lower flanges are each bent toward the outside of the composite, and the first fastening nuts may be provided in plurality for each of the first fastening bolts to serve as a stud bolt.

Further, the first web plate and the second web plate may include a plurality of brackets fixed toward the inside of the composite beam to prevent widening; And a fixing plate to be bolted to the brackets facing each other.

The first upper flange is bent toward the inside of the composite beam, the first lower flange is bent toward the inside of the composite beam, the second upper flange is bent toward the outside of the composite beam, The lower flanges are each bent toward the inside of the composite, and the first fastening nuts may be provided in plurality for each of the first fastening bolts to serve as a stud bolt.

The first upper flange is bent toward the inside of the composite beam, the first lower flange is bent toward the inside of the composite beam, the second upper flange is bent toward the inside of the composite beam, The lower flanges are each bent toward the inside of the composite, and the first fastening nuts may be provided in plurality for each of the first fastening bolts to serve as a stud bolt.

The first upper flange is bent toward the inside of the composite beam, the first lower flange is bent toward the outside of the composite beam, the second upper flange is bent toward the outside of the composite beam, The lower flange is bent toward the inside of each of the composite beams, and the lower plate is provided with a plurality of stud bolts.

Further, the second web plate may include a plurality of brackets fixed toward the inside of the composite beam to prevent the expansion of the brackets; And a fixing plate which is bolted to the brackets facing each other, wherein a side pressure reinforcing plate is disposed on the upper surface of the second lower flange so as to be orthogonal to the second lower flange facing the second flange, And can be coupled by a fastening nut.

The third composite beam unit further includes a third upper flange horizontally bent at the upper end and a third lower flange horizontally bent at the lower end of the third composite beam unit. A pair of third web plates spaced apart from each other to form a side plate of the composite bobbin and a plurality of through holes formed in the third lower flange and the second upper flange, 2, a third fastening bolt for fastening the upper flange, and a third fastening nut.

According to the prefabricated multi-stage composite brace according to the embodiment of the present invention,

First, since the first composite beam unit, the second composite beam unit, the third composite beam unit, and the like are laminated, a multi-stage composite beam can be manufactured in a prefabricated manner, which is advantageous for manufacturing a large beam.

Second, the web plate and the lower plate are separately provided, and the composite beam can be assembled by using the fastening bolt and the fastening nut, so that the cross-section and thickness of the composite beam can be variously changed.

Third, composite beams of various sizes can be manufactured by avoiding the simplification and standardization of member sizes due to the molding and welding of conventional composite beams. By simplifying the manufacturing method by using fastening bolts and fastening nuts, composite beams optimized for the client and site conditions Can be made.

Fourth, the thicknesses of the first web plate, the lower plate, and the second web plate are differently applied, thereby eliminating the unnecessary use of the steel and ensuring economical efficiency.

Fifth, a tensile reinforcement plate may be inserted between the first lower flange and the lower plate to reinforce the first lower flange portion which is weak in tensile force.

Sixth, the head of the fastening bolt faces downward, and the fastening nut is coupled with the fastening bolt from above, so that the finish can be maintained neat from the outside.

Seventh, if necessary, the first upper flange and the second upper flange are bent toward the outside or inside of the composite beam, and the first lower flange and the second lower flange are bent toward the outside or inside of the composite beam to assemble composite beams of various shapes .

Eighth, when the first lower flange is bent toward the inside of the composite bobbin, a plurality of fastening nuts are provided for each fastening bolt, so that it can serve also as a stud bolt.

Ninth, the first web plate or the second web plate includes a plurality of brackets and a fixing plate, so that the wing of the assembled composite can be prevented.

A side pressure reinforcing plate is disposed so as to be orthogonal to the second lower flange facing the upper surface of the second lower flange, and can be easily coupled by the second fastening bolt and the second fastening nut.

1 is a perspective view showing a composite multi-stage composite according to an embodiment of the present invention.
2 is an exploded perspective view of the assembled multi-stage composite beam shown in FIG.
3 is a sectional view of the assembled multi-stage composite beam shown in Fig.
FIG. 4 is a perspective view of a composite multi-stage composite according to another embodiment of the present invention. FIG.
5 is an exploded perspective view of the assembled multi-stage composite beam shown in FIG.
6 is a cross-sectional view of the assembled multi-stage composite beam shown in FIG.
7 is a perspective view illustrating a composite multi-stage composite beam according to another embodiment of the present invention.
8 is an exploded perspective view of the assembled multi-stage composite beam shown in FIG.
9 is a sectional view of the assembled multi-stage composite beam shown in FIG.
10 is a perspective view showing a composite multi-stage composite beam according to another embodiment of the present invention.
11 is an exploded perspective view of the assembled multi-stage composite beam shown in FIG.
12 is a sectional view of the assembled multi-stage composite beam shown in Fig.
13 is a perspective view showing a composite multi-stage composite beam according to another embodiment of the present invention.
14 is an exploded perspective view of the assembled multi-stage composite beam shown in Fig.
15 is a sectional view of the assembled multi-stage composite beam shown in Fig.
16 is a perspective view showing a composite multi-stage composite beam according to another embodiment of the present invention.
17 is an exploded perspective view of the assembled multi-stage composite beam shown in Fig.
18 is a sectional view of the assembled multi-stage composite beam shown in Fig.
19 is a perspective view showing a composite multi-stage composite beam according to another embodiment of the present invention.
20 is an exploded perspective view of the assembled multi-stage composite beam shown in Fig.
21 is a cross-sectional view of the assembled multi-stage composite beam shown in Fig.
22 is a table showing the width-to-thickness ratio of a large beam to be strengthened in the future.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in the drawings, the same components are denoted by the same reference symbols as possible. Further, the detailed description of known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some of the components in the drawings are exaggerated, omitted, or schematically illustrated.

FIG. 1 is a perspective view showing a composite multi-stage composite beam according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the composite multi-stage composite beam shown in FIG. 1, and FIG. 3 is a sectional view of the composite multi-stage composite beam shown in FIG. Fig. 2 is a perspective view of the composite multi-stage composite structure shown in Fig.

1 to 3, the assembled multi-stage composite cable CB includes a first composite beam unit 100 and a second composite beam unit 200. The first composite beam unit 100 forms a lower portion of the composite beam and the second composite beam unit 200 is coupled to the upper side of the first composite beam unit 100. [ The assembled composite beams CB fill concrete in the first composite beam unit 100 and the second composite beam unit 200, which are external structural members in the field.

The first composite beam unit 100 includes a pair of first web plates 110, a lower plate 120, a first fastening bolt 130 and a first fastening nut 140 do.

The first web plate 110 includes a first upper flange 111 that is horizontally bent at the upper end and a first lower flange 112 that is horizontally bent at the lower end. The first web plates 110 are spaced apart from each other to be the side plates of the composite beams.

The lower plate 120 is disposed at the lower side of the first web plates 110 at both ends below the first lower flange 112 so as to be the bottom plate of the composite beam. The thicknesses of the two web plates 110 and the lower plate 120 are different from each other, so that unnecessary use of the steel material can be avoided and economic efficiency can be secured.

The first fastening bolt 130 and the first fastening nut 140 are passed through a plurality of through holes 112a formed in the first lower flange 112 and a plurality of through holes 120a formed in the lower plate 120 And serves to fasten the first lower flange 112 and the lower plate 120.

Here, between the first lower flange 112 and the lower plate 120, a pair of tensile reinforcing plates 400 corresponding to the shape of the first lower flange 112 is further included in the longitudinal direction. A through hole 400a is also formed in the tensile reinforcing plate 400 for fastening the first fastening bolt 130 and the first fastening nut 140. [ The tensile reinforcing plate 400 may be inserted between the first lower flange 112 and the lower plate 120 to reinforce the first lower flange 112 which is weak in tensile force.

Next, the second composite beam unit 200 includes a pair of second web plates 210, a second fastening bolt 230, and a second fastening nut 240.

The second web plate 210 has a second upper flange 211 that is horizontally bent at the upper end and a second lower flange 212 that is horizontally bent at the lower end and is spaced apart from each other to be a side plate of the composite beam.

The second fastening bolt 230 and the second fastening nut 240 have a plurality of through holes 212a formed in the second lower flange 212 and a plurality of through holes 111a formed in the first upper flange 111 So that the second lower flange 212 and the first upper flange 111 are fastened.

The first fastening bolt 130 and the first fastening nut 140, the second fastening bolt 230 and the second fastening nut 240 may be used as a high strength bolt for construction purposes.

At this time, as shown in the figure, the head of the first fastening bolt 130 is directed downward, the first fastening nut 140 is coupled with the first fastening bolt 130 from the upper side, and the head of the second fastening bolt 130 And the second fastening nut 240 is engaged with the second fastening bolt 230 on the upper side. The heads of the fastening bolts 130 and 230 are directed downward and the fastening nuts 140 and 240 are coupled with the fastening bolts 130 and 230 from the upper side to maintain a clean finish from the outside.

Meanwhile, as shown in FIGS. 1 to 3, one of the first upper flanges 111 is bent toward the outside of the composite beam, and the other one 111 'of the first upper flanges is bent toward the inside of the composite beam. Further, one of the first lower flanges 112 disposed directly below the first upper flange 111 is bent toward the outside of the composite bow, and the other one 112 'of the first lower flanges is bent toward the inside of the composite bow Is bent.

In addition, one of the second upper flanges 211 is bent toward the outside of the composite beam, and the other one 211 'is bent toward the inside of the composite beam. Further, one of the second lower flanges 212 is bent toward the outside of the composite beam, and the other one of the second lower flanges 212 'is bent toward the inside of the composite beam.

In the case of such a shape, since one side wall is smooth, it is easy to use on the side wall. The lower plate 120 is provided with a plurality of stud bolts 500.

The first web plate 110 and the second web plate 210 have a plurality of brackets 610 and a fixing plate 620, respectively.

The plurality of brackets 610 are fixed toward the inside of the composite beam, and the fixing plate 620 is bolted to the brackets 610 facing each other. As shown, the fixing plate 620 must be vertically disposed to be easy to fasten with the bracket 610. Here, the bolt (B) is not a high tension bolt as described above, but a normal bolt and a nut are used.

5 is an exploded perspective view of the composite multi-stage composite beam shown in FIG. 4, and FIG. 6 is a cross-sectional view of the composite multi-stage composite beam shown in FIG. 4 .

4 to 6, the assembled multi-stage composite cable CB includes a first composite beam unit 100 and a second composite beam unit 200. Repeated descriptions of the same reference numerals as those of the above-described embodiment are omitted for convenience.

4 to 6, the first upper flange 111 is bent toward the outside of the composite beam, and the first lower flange 112 is bent toward the outside of the composite beam, respectively.

The second upper flange 211 is bent toward the outside of the composite beam and the second lower flange 212 is bent toward the outside of the composite beam. The lower plate 120 is provided with a plurality of stud bolts 500.

Also in this case, a pair of tensile reinforcing plates 400 corresponding to the shape of the first lower flange 112 may be additionally provided in the longitudinal direction between the first lower flange 112 and the lower plate 120.

The head of the first fastening bolt 130 is directed downward and the first fastening nut 140 is engaged with the first fastening bolt 130 at the upper side and the head of the second fastening bolt 230 is also directed at the lower side And the second fastening nut 240 is engaged with the second fastening bolt 230 on the upper side.

The first web plate 110 and the second web plate 210 have a plurality of brackets 610 fixed to the inside of the synthetic fiber to prevent the wings from being pinched and brackets 610 and bolts B facing each other, And may further include a fixing plate 620 to be coupled thereto.

7 is an exploded perspective view of the composite multi-stage composite beam shown in FIG. 7, and FIG. 9 is a cross-sectional view of the composite multi-stage composite beam shown in FIG. 7. FIG. 7 is a perspective view of the composite multi- to be.

Referring to FIGS. 7 to 9, the assembled multi-stage composite cable CB includes a first composite beam unit 100 and a second composite beam unit 200. Repeated descriptions of the same reference numerals as those of the above-described embodiment are omitted for convenience.

7 to 9, the first upper flange 111 is bent toward the outside of the composite beam, and the first lower flange 112 is bent toward the inside of the composite beam, respectively.

The second upper flange 211 is bent toward the outside of the composite beam and the second lower flange 212 is bent toward the outside of the composite beam. A plurality of first fastening nuts 140 are provided for each first fastening bolt 130 to serve as a stud bolt. In the drawing, a pair of first fastening nuts 400 are provided in each first fastening bolt 300.

Also in this case, between the first lower flange 112 and the lower plate 120, a pair of tensile reinforcing plates 400 corresponding to the shape of the first lower flange 112 may be further included in the longitudinal direction, The first web plate 110 and the second web plate 210 may further include a plurality of brackets 610 and a fixing plate 620, respectively, in order to prevent the wing. Since the detailed contents are the same as those of the above-described embodiment, repetitive description will be omitted.

Hereinafter, an embodiment will be described in which the above-described bracket 610 and the fixing plate 620 are only required to be assembled in a single operation rather than in a two-operation operation.

FIG. 10 is a perspective view of a composite multi-stage composite beam according to another embodiment of the present invention, FIG. 11 is an exploded perspective view of the composite multi-stage composite beam shown in FIG. 10, and FIG. 12 is a cross-sectional view of the composite multi-

Referring to FIGS. 10 to 12, the assembled multi-stage composite cable CB includes a first composite beam unit 100 and a second composite beam unit 200.

The first upper flange 111 is bent toward the inside of the composite beam, and the first lower flange 112 is bent toward the inside of the composite beam.

Further, the second upper flange 211 is bent toward the outside of the composite beam, and the second lower flange 212 is bent toward the inside of the composite beam.

The head of the first fastening bolt 130 is directed downward and the first fastening nut 140 is coupled to the first fastening bolt 130 at the upper side and the head of the second fastening bolt 230 is also directed at the lower side, 2 fastening nut 240 is engaged with the second fastening bolt 230 on the upper side. A plurality of first fastening nuts 140 are provided for each first fastening bolt 130 to serve as a stud bolt.

Also in this case, between the first lower flange 112 and the lower plate 120, a pair of tensile reinforcing plates 400 corresponding to the shape of the first lower flange 112 may be further included in the longitudinal direction.

The second web plate 210 includes a plurality of brackets 610 fixed to the inside of the synthetic bobbin to prevent widening and a fixing plate 620 engaged with the brackets 610 and the bolts B facing each other do.

A side pressure reinforcing plate 700 is disposed on the upper surface of the second lower flange 212 such that the side pressure reinforcing plate 700 is orthogonal to the second lower flange 212 facing the second lower flange 212. By the second fastening bolt 230 and the second fastening nut 240, . When the first upper flange 111 and the second lower flange 212 are bent toward the inside of the composite beam, the side pressure reinforcing plate 700 is inserted into the second fastening bolt 230 and the second fastening nut 240, So that it is not necessary to provide a separate bracket 610. FIG.

13 is an exploded perspective view of the composite multi-stage composite beam shown in FIG. 13, FIG. 15 is a sectional view of the composite multi-stage composite beam shown in FIG. 13, and FIG. to be.

13 to 15, the assembled multi-stage composite cable CB includes a first composite beam unit 100 and a second composite beam unit 200.

The second upper flange 211 is bent toward the inside of the composite beam and the second lower flange 212 is bent toward the inside of the composite beam.

Here, between the first lower flange 112 and the lower plate 120, a pair of tensile reinforcing plates 400 are included in the longitudinal direction.

The second web plate 210 includes a plurality of brackets 610 fixed toward the inside of the synthetic bobbin to prevent the wing from being expanded and a fixed plate 620 engaged with the brackets 610 and the bolts B facing each other .

A side pressure reinforcing plate 700 is disposed on the upper surface of the second lower flange 212 such that the side pressure reinforcing plate 700 is orthogonal to the second lower flange 212 facing the second lower flange 212. By the second fastening bolt 230 and the second fastening nut 240, .

16 is an exploded perspective view of the assembled multi-stage composite beam shown in Fig. 16, Fig. 18 is a sectional view of the multi-stage composite beam shown in Fig. 16, and Fig. to be.

Referring to FIGS. 16 to 18, the assembled multi-stage composite cable CB includes a first composite beam unit 100 and a second composite beam unit 200.

The first upper flange 111 is bent toward the inside of the composite beam, and the first lower flange 112 is bent toward the outside of the composite beam.

The second upper flange 211 is bent toward the outside of the composite beam and the second lower flange 212 is bent toward the inside of the composite beam and the lower plate 120 is provided with a plurality of stud bolts 500 .

Also, between the first lower flange 112 and the lower plate 120, a pair of tensile reinforcing plates 400 corresponding to the shape of the first lower flange 112 is further included in the longitudinal direction.

Hereinafter, a composite multi-stage composite beam with the third composite beam unit 300 coupled to the first composite beam unit 100 and the second composite beam unit 200 will be described.

FIG. 19 is a perspective view showing a composite multi-stage composite beam according to another embodiment of the present invention, FIG. 20 is an exploded perspective view of the composite multi-stage composite beam shown in FIG. 19, and FIG. 21 is a sectional view of the composite multi-

19 to 21, the assembled multi-stage composite cable CB includes a first composite beam unit 100, a second composite beam unit 200, and a third composite beam unit 230. The third composite beam forming unit 300 is engaged on the upper side of the second composite beam unit 200.

The third composite beam unit 300 includes a pair of third web plates 310, a third fastening bolt 330, and a third fastening nut 340.

The third web plate 310 has a third upper flange 311 horizontally bent at the upper end thereof and a third lower flange 312 bent horizontally at the lower end thereof so as to be spaced apart from each other to form a side plate of the composite beam.

The third fastening bolt 330 and the third fastening nut 340 pass through the plurality of through holes 312a and 211a formed in the third lower flange 312 and the second upper flange 211, The flange 312 and the second upper flange 211 are fastened.

19 to 21, all of the flanges are bent toward the inside of the composite beams. However, as described above, the directions of the flanges may be variously modified.

The first upper flange 111 is bent toward the inside of the composite beam, and the first lower flange 112 is bent toward the inside of the composite beam. The second upper flange 211 is bent toward the inside of the composite beam and the second lower flange 212 is bent toward the inside of the composite beam.

Further, the third upper flange 311 is bent toward the inside of the composite beam, and the second lower flange 212 is bent toward the inside of the composite beam.

The head of the first fastening bolt 130 is directed downward and the first fastening nut 140 is coupled to the first fastening bolt 130 at the upper side and the head of the second fastening bolt 230 is also directed at the lower side, 2 fastening nut 240 is engaged with the second fastening bolt 230 on the upper side. The head of the third fastening bolt 330 is directed downward, and the third fastening nut 340 is engaged with the third fastening bolt 330 on the upper side. A plurality of first fastening nuts 140 are provided for each first fastening bolt 130 to serve as a stud bolt.

Also in this case, between the first lower flange 112 and the lower plate 120, a pair of tensile reinforcing plates 400 corresponding to the shape of the first lower flange 112 may be included in the longitudinal direction.

The third web plate 310 includes a plurality of brackets 610 fixed toward the inside of the synthetic bobbin to prevent widening and a fixing plate 620 engaged with the brackets 610 and the bolts B facing each other do.

A side pressure reinforcing plate 700 is disposed on the upper surface of the third lower flange 312 so as to be orthogonal to the third lower flange 312 facing the third lower flange 312. The third side bolt 330 and the third bolt 340 do.

Finally, FIG. 22 is a table showing the width-to-thickness ratio of the large beam to be strengthened in the future. It is necessary to reinforce the flange and the web of the square steel pipe as shown in FIG. 22 as the width width thickness ratio is strengthened as compared with the prior art. As shown in the embodiment of the present invention, the first composite beam unit 100, the second composite beam unit 200, When each composite beam unit such as the composite beam unit 300 is laminated separately, it is easy to adjust the thickness of each web plate so that it can be actively coped with.

Thus, according to the present invention, the first composite beam unit 100, the second composite beam unit 200, the third composite beam unit 300, and the like can be stacked to form a multi-stage composite beam in a prefabricated manner. Further, the web plate and the lower plate are separately provided, and the composite beam can be assembled using the fastening bolt and the fastening nut, so that the cross-section and thickness of the composite beam can be variously changed.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of the present invention in order to facilitate the understanding of the present invention and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100 ... First composite bow unit 200 ... Second composite bow unit
300 ... third composite beam unit 400 ... tensile reinforcing plate
500 ... Stud bolt 610 ... Bracket
620 ... stationary plate

Claims

A first synthetic bow unit that forms a lower portion of the composite bow; And
And a second composite beam unit coupled above the first composite beam unit,
The first combine-
A pair of first web plates provided with a first upper flange horizontally bent at the upper end and a first lower flange horizontally bent at the lower end,
A lower plate disposed on the lower side of the first lower flange at both ends below the first web plates so as to form a bottom plate of the composite bow,
And a first fastening bolt and a first fastening nut passing through the plurality of through holes formed in the first lower flange and the lower plate to fasten the first lower flange and the lower plate,
The second composite beam unit
A pair of second web plates having a second upper flange horizontally bent at the upper end and a second lower flange bent at the lower end and spaced apart from each other to form a side plate of the composite beam,
And a second fastening bolt and a second fastening nut passing through the plurality of through holes formed in the second lower flange and the first upper flange to fasten the second lower flange and the first upper flange, Prefabricated multi - stage composite beams.

The method according to claim 1,
Between the first lower flange and the lower plate,
And a pair of tensile reinforcing plates corresponding to the shape of the first lower flange in the longitudinal direction.

The method according to claim 1,
The head of the first fastening bolt faces downward, the first fastening nut engages with the first fastening bolt on the upper side,
Wherein the head of the second fastening bolt faces downward, and the second fastening nut engages with the second fastening bolt on the upper side.

The method of claim 3,
One of the first upper flanges is bent toward the outside of the composite beam and the other is bent toward the inside of the composite beam, one of the first lower flanges is bent toward the outside of the composite beam, Lt; / RTI >
One of the second upper flanges is bent toward the outside of the composite beam and the other is bent toward the inside of the composite beam and one of the second lower flanges is bent toward the outside of the composite beam, Lt; / RTI >
Wherein the lower plate is provided with a plurality of stud bolts.

The method of claim 3,
The first upper flange is bent toward the outside of the composite beam, the first lower flange is bent toward the outside of the composite beam,
The second upper flange is bent toward the outside of the composite beam, and the second lower flange is bent toward the outside of the composite beam,
Wherein the lower plate is provided with a plurality of stud bolts.

The method of claim 3,
The first upper flange is bent toward the outside of the composite beam, the first lower flange is bent toward the inside of the composite beam,
The second upper flange is bent toward the outside of the composite beam, and the second lower flange is bent toward the outside of the composite beam,
Wherein the first fastening nut is provided for each of the first fastening bolts to serve as a stud bolt.

The method according to any one of claims 4 and 6,
The first web plate and the second web plate may be configured to prevent widening
A plurality of brackets fixed toward the inside of the composite beam; And
And a fixing plate for bolt coupling with the brackets facing each other.

The method of claim 3,
The first upper flange is bent toward the inside of the composite beam, the first lower flange is bent toward the inside of the composite beam,
The second upper flange is bent toward the outside of the composite beam and the second lower flange is bent toward the inside of the composite beam,
Wherein the first fastening nut is provided for each of the first fastening bolts to serve as a stud bolt.

The method of claim 3,
The first upper flange is bent toward the inside of the composite beam, the first lower flange is bent toward the inside of the composite beam,
The second upper flange is bent toward the inside of the composite beam, and the second lower flange is bent toward the inside of the composite beam,
Wherein the first fastening nut is provided for each of the first fastening bolts to serve as a stud bolt.

The method of claim 3,
The first upper flange is bent toward the inside of the composite beam, the first lower flange is bent toward the outside of the composite beam,
The second upper flange is bent toward the outside of the composite beam and the second lower flange is bent toward the inside of the composite beam,
Wherein the lower plate is provided with a plurality of stud bolts.

The method according to any one of claims 8 and 10,
The second web plate can be used to prevent widening
A plurality of brackets fixed toward the inside of the composite beam; And
Further comprising a fixing plate which is bolted to the brackets facing each other,
And a side pressure reinforcing plate is disposed on the upper surface of the second lower flange so as to be orthogonal to the second lower flange facing the lower flange, and is engaged by the second fastening bolt and the second fastening nut.

The method according to claim 1,
And a third composite beam unit coupled above the second composite beam unit,
The third composite beam unit
A pair of third web plates having a third upper flange horizontally bent at the upper end and a third lower flange horizontally bent at the lower end,
And a third fastening bolt and a third fastening nut passing through the plurality of through holes formed in the third lower flange and the second upper flange to fasten the third lower flange and the second upper flange, Prefabricated multi - stage composite beams.