KR20130088246A

KR20130088246A - Connecting structure of corrugated steel plate web-psc composite girder

Info

Publication number: KR20130088246A
Application number: KR1020120009361A
Authority: KR
Inventors: 권희재
Original assignee: 권희재
Priority date: 2012-01-31
Filing date: 2012-01-31
Publication date: 2013-08-08

Abstract

The present invention proposes a prefabricated connection structure of the composite composite girder of the abdominal corrugated steel sheet. The prefabricated connection structure of the composite composite girder of the abdominal corrugated steel sheet according to the present invention uses the cover connection assembly member having the cross-sectional shape of the abdominal corrugated steel sheet and concrete, but the abdominal corrugated steel sheet and the upper concrete and the lower concrete The three parts are separated separately so that they can be freely transported, assembled and disassembled, and each part (abdominal corrugated steel sheet, upper concrete, lower concrete) can be easily pre-manufactured independently at the factory or near the site, and then taken to the site. By assembling each part by transporting or assembling part of upper and lower concrete with the abdominal corrugated steel sheet, the bridge can be completed very easily, simply and quickly. It may be disassembled, dismantled and replaced.

Description

Connecting structure of corrugated steel plate web-PSC composite girder

The present invention relates to a composite composite girder of an abdominal corrugated steel sheet, and more specifically, to a beam such as an I-shaped or T-shaped composite of concrete on the upper and lower sides of an abdominal corrugated steel sheet using a corrugated steel sheet as a web member. In the beam type, the closed single box type and the multiple box type, or other composite girder of the abdominal corrugated sheet and concrete, the joint connection between the abdominal corrugated sheet and the concrete Use the cover type assembly connecting member with the cross section of the abdomen, but separate the three parts of the abdominal corrugated sheet, the upper concrete and the lower concrete separately so that it can be freely transported and assembled and disassembled. , The lower concrete) can be easily pre-manufactured independently at the factory or near the site and then transported to the site to assemble each part or Part of the subconcrete can be cast in place with the abdominal corrugated sheet to make the bridge very easy, simple and quick. Moreover, after completing the bridge, the abdomen can be easily disassembled, dismantled and replaced only as needed, even during public use. The present invention relates to a prefabricated connection structure of corrugated steel concrete composite girder.

Prestressed concrete (PSC) composite structure of abdominal corrugated steel sheet in bridges reduces the weight of the mold, the superstructure of the bridge, by 20-30% by replacing the abdominal member of the superstructure with lightweight corrugated steel. The upper and lower concrete resists and the shear force resists the corrugated steel sheet of the abdomen.

Accordingly, due to the reduction of dead weight due to the self-weight of the mold, the upper mold itself has not only a great structural efficiency but also an accordion effect that can effectively introduce prestress into concrete as a characteristic of the corrugated steel sheet that freely flows without resisting axial force. In addition, although the abdomen is a thin steel sheet has the advantage of being able to secure a sufficient shear buckling strength without having to install a separate reinforcement because of the shape of the waveform.

Moreover, due to the reduced self-weight of the upper mold, the cross-section and scale of the bridge substructure can also be significantly reduced. In addition, it is possible to shorten the air and reduce the construction cost by improving the field workability by omitting the abdominal reinforcing bar and concrete work which require the most foam.

As a background technology of the present invention, Patent Registration No. 0625304 "Prestressed steel-type steel girder bridge construction method using a prefabricated steel-shaped steel girder with a corrugated steel sheet installed in the abdomen".

In the background art, a pair of corrugated steel sheets provided at regular intervals is used as a corrugated abdomen, and each upper part of the corrugated abdomen is provided with a fixed size steel plate separately attached to the upper flange, and the pair of corrugated abdominal parts is installed. Fabricate the prefabricated U-shaped steel girders with the lower flanges attached to the lower part to be integrated with the steel plate of a certain size, and connect the girder and the girders by forming the connecting part while installing the prefabricated U-shaped steel girders at the branch. The floor concrete is installed in the space inside the pair of corrugated abdomen and the lower flange, and the upper concrete, which includes the upper flange, is placed at the position where the moment is generated when the load is applied to the bridge. Therefore, in other words, at the point where the parent moment is generated, the bottom of the upper concrete concrete, the constant moment In the center of the generated girder, a sheath for interconnecting the fixing unit of the fixing device is embedded in the floor concrete or the bridge top concrete while installing a pair of fixing devices at a predetermined interval on the upper portion of the floor concrete. In the prestressed U-shaped steel girder bridge in which a prestress is introduced and fixed to a fixing device while the PS steel wire is inserted and arranged,

The fixing device is provided with an end plate formed with a fixing hole in the center of the upper and lower plates so as to protrude to the upper portion of the bottom concrete and the lower portion of the bridge concrete, and the side plate of the portion in contact with the end plate is gradually lowered to increase the concrete surface In contact with the side plate is welded to both sides of the end plate to the same height of the concrete, so that both ends of the sheath buried in both sides of the bottom concrete and the upper concrete of the bridge is in close contact with the fixing hole of the end plate After installation, the PS steel wire is inserted into the fixing hole on one side, and the PS steel wire protrudes into the fixing hole on the other side, and then, the fixing unit is purchased to fix the PS steel wire in the fixing hole, and the prestress is introduced into the PS steel wire. Even if you settle in the fixing device installed on both sides A prestressed U-shaped steel girder bridge construction method using a prefabricated U-shaped steel girder with corrugated steel plates characterized by the above is proposed.

However, the background art is easy to carry than the conventional completed composite girders, but the structure to install and install the girder 30 and the girder 30 to form a connection portion 40 to a predetermined length, the abdomen waveform Steel plate upper and lower concrete is not a separate member still not easy to transport, there was a problem that can not be applied to all shapes of girders.

In addition, all the known methods in the composite structure bridge of the abdominal corrugated steel sheet and concrete are structures in which the abdominal corrugated steel sheet and the upper and lower concrete are not separated at all. Shear, which is embedded in the lower concrete and cannot be separated and integrated, or is installed to be fixed to a steel plate that is completely integrated with the abdominal corrugated steel plate by welding at the upper and lower ends of the abdominal corrugated steel sheet. Attaching reinforcing bars, studs, etc. by welding joints and embedded in concrete, the abdominal corrugated steel sheet and the upper and lower concretes are not separated, but are also integrated as one of the purposes of the present invention. The three parts of concrete can be separated independently and easily pre-fabricated for transportation, assembly and disassembly. Who are not free to the structure.

Patent Registration No. 0625304

The present invention is to solve the above problems, but connecting the abdominal corrugated steel sheet and the upper, lower concrete as a cover type assembly connecting member having a variety of cross-section, the assembly connecting member is used as a means such as stud or shear connecting bars In addition, it is fastened to be fixed to the concrete underneath, and the abdominal corrugated steel sheet can be easily assembled and dismantled as needed by the joint of bolts and nuts, and ultimately, the main component of the composite composite girder The three parts of the abdominal corrugated steel plate and the upper concrete and the lower concrete are separated separately so that they can be easily pre-manufactured independently in the factory or on site, and then freely transported, assembled and dismantled. Simple and fast construction of bridges of abdominal corrugated concrete composite structure Rock, and at the same time also to provide a modular structure of the connection may also be replaced easily by selectively decomposing only the portions specific to the stomach and dissolution corrugated steel concrete composite girder as needed after completion of the bridge while the public it is an object.

The present invention is made of steel and the abdominal corrugated steel sheet having a curved shape in a regular form, the assembly connection member consisting of steel and having a c-shaped or H-shaped cross section, the portion surrounding the concave groove of the assembly connecting member It consists of upper concrete and lower concrete exposed to the outside and the remaining portion is embedded, and the abdominal corrugated steel sheet is characterized in that the upper and lower ends are fitted into the concave groove of the assembly connecting member integrally combined with the upper concrete and the lower concrete, respectively. To provide a prefabricated connection structure of the composite composite girder of the abdominal corrugated steel sheet.

In this case, the upper concrete and the lower concrete may be selectively produced in advance or poured directly on site.

In addition, the assembly connecting member may be composed of a U-shaped assembly connecting member having a U-shaped cross-section, H-shaped assembly connecting member having an H-shaped cross section, etc. For the synthesis of the upper and lower concrete, the assembly connecting member has a stud bolt It is possible to further engage the restraint bars that are joined or drilled or through the connector.

According to the present invention, three parts of the upper and lower concrete and abdominal corrugated steel sheets are each made to be independent components. To freely transport and assemble to the site, or to install some of the upper and lower concrete by site casting, and the other part to pre-fabricate and assemble on site. In addition to the construction of the bridge, it is also a very useful effect that can be easily dismantled, dismantled and replaced only a specific part as needed during the completion of the bridge.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
1 is a perspective view showing the connection structure of the composite composite girder abdominal corrugated steel sheet according to an embodiment of the present invention.
2 is an exploded perspective view of FIG.
3A is a cross-sectional view of FIG. 1.
3B is a cross-sectional view of another embodiment of FIG. 3A.
Figure 4 is a cross-sectional view showing a coupling state of the abdominal corrugated steel sheet and the upper and lower concrete.
5 is a cross-sectional view showing a connection structure of the composite composite girder abdominal corrugated steel sheet according to another embodiment of the present invention.
FIG. 6 is a view showing that a prestressed U-shaped steel girder bridge is installed by connecting a conventional assembled U-shaped steel girder to a point portion of a straight bridge.

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.

The present invention uses a corrugated steel sheet as an abdominal (Web) member, and a beam (I-shaped or T-shaped, etc.) in which concrete (prestress can be introduced into the concrete, if necessary) is synthesized on the upper and lower portions of the abdominal corrugated steel sheet. It can be applied to both composite girder consisting of abdominal corrugated sheet steel and upper and lower concrete as type, or closed single box type and multiple box type or other cross-sectional shapes. The present invention is described below with reference to an I-shaped synthetic girder, but this is illustrative and the present invention is not limited thereto.

1 is a perspective view showing a connection structure of a composite composite girder abdominal corrugated steel sheet according to an embodiment of the present invention, Figure 2 is an exploded perspective view of the Figure 1, Figure 4 shows a combined state of the abdominal corrugated steel sheet and the upper and lower concrete One cross section.

As shown in Figures 1 and 2, the connection structure of the abdominal corrugated steel sheet concrete composite girder (G) according to an embodiment of the present invention, consisting of steel (Steel) and the shape of the curved waveform in a regular form It is composed of the upper and lower concrete 30, 40 having the abdominal waveform steel plate 10, and the assembly connecting member 20 is bound. The assembly connecting member 20 is composed of a section steel made of steel (Steel) having a c-shaped or H-shaped cross section and one side of the upper and lower concrete 30, 40 and the means by means of studs, shear connecting rebar connection hole, etc. The portion that is bound to be one complete and surrounds the concave groove 21 on the other side is installed to be exposed to the outside. Accordingly, the upper and lower concrete 30, 40 and the abdominal corrugated steel sheet 10, to which the assembly connection member 20 is bound, are composed of three independent individual members.

As shown in FIG. 4, the upper and lower ends of the abdominal corrugated steel sheet 10 are inserted into the concave grooves 21 of the assembly connecting member 20, and the surfaces of the abdominal corrugated steel sheet 10 contacting the bolts and nuts 50. By assembling the upper and lower concrete 30, 40 and the abdominal corrugated steel sheet 10 is assembled to be a complete composite structure through the assembly connecting member (20).

As described above, according to the present invention, the abdominal corrugated steel sheet 10, the upper concrete 30, and the lower concrete 40 are divided into three parts, so as to be easily assembled and dismantled. In particular, the abdominal corrugated steel sheet 10 is completely separated from the upper and lower concrete 30, 40, only through the assembly connection member 20, the upper and lower concrete 30, 40 as a bolt and nut 50 By assembling together), the abdominal corrugated steel sheet 10, the upper concrete 30, and the lower concrete 40 are separated from the factory or the site, and manufactured separately beforehand, and then transported and assembled to the site. It is a way.

In addition, the upper and lower concrete 30, 40 is divided into all parts as previously planned in advance as necessary, so that the assembly connection member 20 is integrally bound in the factory or on the site, the pre-fabrication and the site The abdomen can be assembled together with the abdominal corrugated steel sheet 10 or part of the prefabrication as described above, and the other part of the abdominal corrugated steel sheet 10 and the assembly connecting member 20 are assembled in the same manner as above. Later, the concrete 30, 40 can be poured directly on site, and cured. In this case as well, the concave side of the abdominal corrugated steel sheet 10 and the assembled connection member 20 assembled first is exposed to the outside of the concrete 30 and 40 so that the abdominal corrugated steel sheet 10 can be easily separated and dismantled. Let it go.

The assembly connecting member 20 is provided with a section steel having a cover-shaped cross section of various shapes with a concave portion is inserted into the concave groove 21 portion of the upper and lower ends of the abdominal corrugated steel sheet 10 and eventually assembled assembly member ( 20) is formed in the form covered with the top and bottom of the abdominal corrugated steel sheet 10 in the longitudinal direction, respectively. The cross-sectional shape may be composed of a U-shaped assembly connecting member 210 having a U-shaped cross section, an H-shaped assembly connecting member 220 having an H-shaped cross section, and the like.

Figure 3a is a cross-sectional view showing a composite composite girder of the abdominal corrugated steel sheet using the U-shaped connection member.

The U-shaped connection member 210 is a U-shaped cross-section is composed of a vertical member 212 orthogonal to only one side on both sides of the horizontal member 211 and the horizontal member 211 between the two vertical members 212 In the space of the concave groove 21 is formed. The other side of the horizontal member 211, which is not concave, is attached with a welding joint so that the shear connector 213 such as studs or reinforcing bars is firmly fixed at regular intervals, so that the upper and lower concretes 30 and 40 By being buried, the upper and lower concrete 30, 40 and the outer surface of the horizontal member 211 is bound so as to be completely integrated into one unit. The other side of the concave groove 21 and both vertical members 212 are exposed to the outside, and the upper and lower ends of the abdominal corrugated steel sheet 10 are sandwiched between the vertical members 212 on both sides. Each side of the abdominal corrugated steel sheet 10, which abuts on both vertical members 212, is combined with bolts and nuts 50. Finally, upper and lower portions of the abdominal corrugated steel sheet 10 are connected to each other through the U-shaped connecting member 210. The concrete 30, 40 is to be assembled into a complete structure.

3B is a cross-sectional view of another embodiment of FIG. 3A, wherein the horizontal member 211 protrudes from both of the vertical members 212 in the U-shaped connecting member 210, and the shear connecting member such as the stud or reinforcing bar described above. The attachment area of 213 is further extended in the lateral direction so that it can be stably applied to a larger composite girder.

5 is a cross-sectional view showing a composite composite girder of the abdominal corrugated steel sheet using the H-shaped connecting member.

As shown in FIG. 5A, the H-shaped assembly connecting member 220 has an H-shaped cross section consisting of a central web 221 and two flanges 222a and 222b orthogonal to the left and right sides of the web 221. . Accordingly, the recessed grooves 21 are positioned up and down between the left and right flanges 222a and 222b around the web 221 so that both flanges 222a and 222b on one side are formed with the recessed grooves 21 on one side. The H-shaped connecting member 220 is embedded in the upper and lower concrete 30 and 40 and the two flanges 222a and 222b and the concave grooves 21 of the other side are exposed to the outside. It is bound to be one integral with the concrete 30, 40 of. At this time, the upper and lower ends of the abdominal corrugated steel sheet 10 are inserted into the concave grooves 21 of the other side exposed to the outside, and each of the abdominal corrugated steel sheets 10 contacting the exposed flanges 222a and 222b. The surfaces were joined as bolts and nuts 50 so that the abdominal corrugated steel sheet 10 and the upper and lower concretes 30 and 40 were assembled into one complete structure through the H-shaped connecting member 210. will be.

In addition, the connecting holes 223a and 223b are formed in the flanges 222a and 222b on one side of the upper and lower parts of the concrete 30 and 40 so that the concrete 30 and 40 are connected to each other. Since the 223a and 223b are continuous, the connection holes 223a and 223b constrain the concrete 30 and 40 and the H-shaped connecting member 220 together in all directions. Accordingly, it is possible to secure the effect of binding the H-shaped connecting member 220 and the concrete 30, 40 in a stronger structure.

In addition, as shown in Figure 5b, by providing a restraint reinforcing bar 224 of a predetermined length to pass through the connecting holes (223a, 223b) of the flanges (222a, 222b) to act as a separate shear connector or Or H-shaped connecting member 220 is attached to the shear connector 225, such as studs, reinforcing bars on the outer surface of one side flange (222a, 222b) is embedded in concrete H-shaped connecting member 220 And the concrete 30, 40 may be more strongly secured to bind the unitary structure.

As described above, according to the present invention, if necessary, the upper and lower concretes 30 and 40 may be pre-fabricated in the vicinity of the factory or the site as a whole, or some of the upper and lower concretes 30 and 40 may be removed. Pre-production in the factory or near the site, and the other part is directly cast and cured at the site to be assembled using the assembly connecting member 20 to the abdominal corrugated steel sheet 10, various efficient methods according to the various conditions Its optional application makes it possible to complete abdominal corrugated concrete composite girder bridges very quickly and easily.

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.

10: abdominal corrugated steel sheet
20: assembly connection member
21: home
210: U-shaped assembly connecting member
211: horizontal member
212 vertical member
213: Shear connector
220: H-shaped connection member
221 web
222a, 222b: flange
223a, 223b: Connecting hole
224 shear shear bars
225: Shear connector
30: upper concrete
40: lower concrete
50: Bolt

Claims

An abdominal corrugated steel plate 10 composed of steel and having a curved shape in a regular shape,
Assembly connection member 20 made of steel and having a U or H cross section,
The part surrounding the concave groove 21 of the assembly connecting member 20 is composed of the upper concrete 30 and the lower concrete 40 is exposed to the outside and the remaining portion is embedded,
Abdominal corrugated steel sheet 10 is the upper and lower abdomen, characterized in that the coupling is fitted into the concave groove 21 of the assembly connecting member 20 is integrally coupled to the upper concrete 30 and the lower concrete 40, respectively Prefabricated connection structure of steel plate concrete composite girder.

The method according to claim 1,
The upper and lower concrete 30, 40 is a prefabricated connection structure of the composite composite girder abdominal corrugated steel sheet, characterized in that the pre-fabrication in the factory or near the site.

The method according to claim 1,
Any one of the upper and lower concrete 30, 40 is pre-fabricated in the factory or near the site and the other one is directly poured in the site, curing, using the assembly connection member 20 to the abdominal corrugated steel sheet 10 Prefabricated connection structure of the composite composite girder of the abdominal corrugated steel sheet, characterized in that the assembly.

The method according to claim 1,
The assembly connection member 20 is composed of a horizontal member 211 and a vertical member 212 orthogonal to only one side on both left and right sides of the horizontal member 211, and a recessed groove (between the two vertical members 212 on one side) 21 is formed, the outer surface of the non-concave horizontal member 211 is attached to the shear connector 213 attached to the c-shaped assembly connection member 210 embedded in the concrete 30, 40,
The upper and lower ends of the abdominal corrugated steel sheet 10 are fitted into concave grooves 21 formed between both vertical members 212 of the U-shaped connecting member 210 exposed outside the concrete 30 and 40 to be coupled. Prefabricated connection structure of the composite composite girder of the abdominal corrugated steel sheet being characterized.

5. The method of claim 4,
The horizontal member 211 of the U-shaped connecting member 210 is a prefabricated connection structure of the composite composite girder abdominal corrugated steel sheet, characterized in that it is further extended to the outside of both vertical members (212).

The method according to claim 1,
The assembly connecting member 20 is composed of a flange 222a, 222b perpendicular to the web 221 and the left and right sides of the web 221 up and down, concave groove (between the flange 222a, 222b) 21) is composed of H-shaped connecting member 220 of the H-shape made of steel,
Both flanges 222a and 222b and concave grooves 21 on one side of the web 221 are embedded in the concrete 30 and 40 to form the H-shaped connecting member 220 and the concrete 30 and 40. Is combined into one complete unit, and both flanges 222a and 222b on the other side are exposed out of the concrete 30 and 40 together with the concave groove 21 so that the upper and lower ends of the abdominal corrugated steel sheet 10 are Prefabricated connection structure of the composite composite girder of the abdominal corrugated steel sheet, characterized in that it is fitted into the concave groove 21 between the exposed both flanges (222a) (222b).

The method of claim 6,
In the H-shaped connecting member 220, both flanges 222a and 222b of one side embedded in the concrete 30 and 40 are connected to each other through holes 223a and 223b at regular intervals. Prefabricated connection structure of composite composite girder

8. The method according to claim 6 or 7,
Abdominal waveform, characterized in that the shear connector 225 is attached to the outer surface of the one side both flanges (222a, 222b) embedded in the concrete 30, 40 in the H-shaped connecting member 220 at a predetermined interval Prefabricated connection structure of steel plate concrete composite girder.

The method of claim 6,
Prefabricated connecting structure of the composite composite girder of the abdominal corrugated steel sheet characterized in that the shear restraint reinforcing bar 224 is inserted into the connection hole (223a) (223b) of the H-shaped connecting member 220.