KR20160141987A

KR20160141987A - Girder structure

Info

Publication number: KR20160141987A
Application number: KR1020150077732A
Authority: KR
Inventors: 조광일; 박찬희; 성택룡; 이필구; 김진국
Original assignee: 주식회사 포스코
Priority date: 2015-06-02
Filing date: 2015-06-02
Publication date: 2016-12-12
Also published as: KR101712140B1

Abstract

Disclosed is a girder structure, comprising: one or more main girder beams installed on slab of a bridge in the longitudinal direction of the bridge; more reinforcement girder beams than the main girder beams spaced from the main girder beams to be installed on the slab in the same direction with the main girder beams and supported by a pier of the bridge; and a transition girder beam connecting the reinforcement girder beams to the main girder beams. The girder structure maintains structural integrity and improves economic efficiency, and easily manages a design, construction, and maintenance.

Description

{GIRDER STRUCTURE}

The present invention relates to a girder structure, and more particularly, to a girder structure capable of improving economical efficiency while maintaining structural integrity.

Generally, a bridge is a structure constructed so as to pass through a river, a lake, a strait, a canal, or other transportation roads or the upper side of a building, and is divided into an upper structure and a lower structure. The superstructure is a structure located above the abutment or pier, which consists of a girder and a slab. The girder is the most powerful main component, and is used to determine the type of bridge. That is, the bridge to which the girder is applied is called girder bridge. Further, the slab means a bottom plate that allows a vehicle or a person to pass through the upper portion, and a girder is located on the lower surface. In addition, the substructure means an alternation and pier which has the function of safely transferring the load acting from the superstructure to the ground. An alternation means a pedestal for the point of a point of the bridge, and a bridge means a pedestal for a part of the bridge other than the point of intersection between the alternations. In this case, the alternation and bridge piers have the form of direct foundation, pile foundation, and puddle foundation depending on the ground condition on the lower side. Further, the foundation slab is located at the lower end of the bridge pier.

Particularly, the girder is a member extending along the longitudinal direction of the bridge, and a part of the girder is supported by the alternating and piercing supports while supporting the slab. Generally, the girder has an I-shaped section or a box-shaped section. I-shaped cross-section girders are often used as the most efficient structural members. On the other hand, the box-shaped cross-section girder is applied to the fulcrum portion of a bridge which has high torsion and safety margin, and which requires high rigidity. However, since the boxed section girder has a closed section, it requires more material than the I - section section girder when it is applied to the part other than the fulcrum part of the bridge, which leads to a decrease in economical efficiency and a difficulty in designing, construction and maintenance.

Published Patent Application No. 10-2006-0093826 (published on August 28, 2006) Published Patent Application No. 10-2010-0055278 (Disclosure Date: May 26, 2010) Patent Document 10-2003-0052879 (published on June 27, 2003)

The present invention provides a girder structure which is installed according to the required rigidity of a bridge to improve the economical efficiency while maintaining the structural integrity.

The present invention also provides a girder structure that is easy to design, construct, and maintain.

The present invention provides a bridge structure comprising at least one main girder beam installed in a slab of a bridge along a longitudinal direction of the bridge; A plurality of reinforcing girder beams installed on the slabs in the same direction as the one or more main girder beams spaced apart from the one or more main girder beams and being greater than the one or more main girder beams supported by the bridge piers; And a transition girder beam connecting the reinforced girder beams to the at least one main girder beam.

The transverse girder beam has n connection portions on one side and n + 1 connection portions on the other side (where n is a natural number), and one or more main girder beams are connected to the connection portions on one side, And the reinforcing girder beams are connected to the connecting portions on the other side of the girder structure.

In addition, the transverse girder beam has a shape in which the connecting portions on the other side and the connecting portions on the one side are continuously and alternately connected.

Further comprising a girder beam connection portion connected to the reinforcing girder beams and the transition girder beams to close the space of the upper and lower surfaces formed by the reinforcing girder beams and the transition girder beams. .

The present invention also provides a unit girder structure comprising: n main girder beams installed on a slab of the bridge along a longitudinal direction of the bridge; N + 1 reinforced girder beams installed on the slabs in the same direction as the main girder beams spaced apart from the main girder beams and supported by the bridge piers; And n + 1 connection portions are formed on the side of the reinforcing girder beam, the main girder beams are connected to the n connection portions, and the reinforcing girder beams are connected to the (n + 1) A transitional girder beam connected; And an extension transition girder beam having n + 1 connection portions formed on the side of the reinforcing girder beam to connect to the reinforcing girder beams and n connection portions on the opposite side, wherein the unit girder structure is formed along the longitudinal direction of the bridge The present invention discloses a unit girder structure (where n is a natural number), which is repeatedly connectable.

The girder structure of the present invention has the following effects.

(1) The girder structure of the present invention connects reinforcing girder beams provided corresponding to the fulcrum portion of a bridge to one or more main girder beams using a transverse girder beam, and concentrates more girder beams It is possible to improve the economical efficiency while maintaining the structural integrity.

(2) Since the girder structure of the present invention forms an open space between the reinforcing girder beams and the transition girder beams used to connect one or more main girder beams to the reinforcing girder beams, And maintenance.

1 is a perspective view showing a part of a girder structure according to a first preferred embodiment of the present invention.
2 is a perspective view showing a bridge to which the girder structure shown in Fig. 1 is applied.
3 is a perspective view showing a part of a girder structure according to a second preferred embodiment of the present invention.
4 is a perspective view showing a part of a girder structure according to a third preferred embodiment of the present invention.
5 is a perspective view illustrating a unit girder structure for a bridge according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 is a perspective view showing a part of a girder structure 100 according to a first preferred embodiment of the present invention, and FIG. 2 is a perspective view showing a bridge 10 to which the girder structure 100 shown in FIG. 1 is applied .

1 and 2, a girder structure 100 according to a first preferred embodiment of the present invention includes a main girder beam 101, a reinforcing girder beam 102, and a transverse girder beam 103 So. Is installed along the longitudinal direction (L) of the bridge (10) on the lower surface of the slab (11) of the bridge (10) and a part thereof is supported by the bridge bridge (12).

The main girder beam 101 is installed along the longitudinal direction L of the bridge 10 at the lower surface of the slab 11. [ On the other hand, the main girder beam 101 may be formed as plural as necessary. At this time, the main girder beams 101 are spaced apart from each other along a direction crossing the longitudinal direction L of the bridge 10. That is, the number of the main girder beams 101 can be adjusted according to the condition of the bridge 10, and the number of the main girder beams 101 is one or more.

The reinforcing girder beams 102 are formed in a larger number than the main girder beams 101 and are spaced from the main girder beam 101 at the lower surface of the slab 11 so as to extend in the longitudinal direction L of the bridge 10, Are installed along the same direction as the girder beam (101). At this time, the reinforced girder beams 102 are spaced apart from each other along the direction crossing the longitudinal direction L of the bridge 10.

Further, the reinforced girder beams 102 are supported by the pier 12 and are positioned in the moment section, that is, the fulcrum section, on which the upper surface of the bridge 10 is pulled. At this time, the main girder beam 101 is not directly connected to the reinforcing girder beams 102 but is positioned in a moment section in which the lower surface of the bridge except for the fulcrum portion of the bridge 10 is pulled. On the other hand, the number of the reinforced girder beams 102 is larger than the number of the main girder beams 101 because the pointed portion of the bridge 10 requires a relatively higher rigidity than the other portions. That is, the main girder beam 101 and the reinforcing girder beam 102 are installed at positions corresponding to the stiffness required in the bridge 10.

Transition girder beam 103 connects reinforced girder beams 102 to main girder beam 101. In this embodiment, the transverse girder beam 103 is shown in a V-shape and connects a pair of reinforced girder beams 102 to one main girder beam 101. However, the transitional girder beam 103 can be deformed into various shapes, so that a plurality of reinforced girder beams 102 can be connected to one main girder beam 101.

Also, as shown in FIG. 1, one girder structure 100 is formed for one main girder beam 101. That is, when there are two main girder beams 101, the main girder beams 101 are each connected to the same or different numbers of reinforced girder beams 102 by the transition girder beams 103. At this time, two girder structures 100 spaced apart from each other are formed.

The reinforcing girder beams 102 in the girder structure 100 of this embodiment are installed in the slab 11 of the bridge 10 requiring a relatively high rigidity to the bridge 10 and the main girder beam 101 is installed on the bridge 10 10 in the slab 11 of the remaining part. At this time, the reinforced girder beams 102 are installed at a greater number than the main girder beams 101 in the direction crossing the longitudinal direction L of the bridge 10. [ That is, the girder structure 100 may be provided on the slab 11 of the bridge 10 so as to correspond to the required rigidity, and may be manufactured using an appropriate amount of the material. As a result, the girder structure 100 can improve the economical efficiency while maintaining the structural integrity.

In addition, in the girder structure 100, the main girder beam 101, the reinforcing girder beams 102, and the transition girder beam 103 are structures having an I-shaped section. Here, the I-shaped cross-sectional structure is composed of an upper flange and a lower flange disposed parallel to each other while being mutually corresponded, and a web connecting the upper flange and the lower flange. Since the main girder beam 101, the reinforcing girder beams 102 and the transverse girder beam 103 have the same structure, no separate fabrication process is required and only cutting and connecting are required so as to have a required length. Thus, the girder structure 100 of the present embodiment is easy to design and construct since the structure can be formed without deforming the I-shaped sectional structure. In particular, an open space is formed between the reinforced girder beams 102 and the transverse girder beam 103. Because of this, the girder structure 100 of the present embodiment is in an open state, so it is easy in terms of maintenance.

Since the girder structure 100 is formed as described above, a vertical stiffener, a horizontal stiffener, a beam, a bracing or the like applied to the I-shaped section structure, although not specifically shown, As shown in FIG. As a result, the girder structure 100 has increased rigidity.

3 is a perspective view showing a part of a girder structure 200 according to a second preferred embodiment of the present invention. 3, the girder structure 200 according to the second preferred embodiment of the present invention is similar to the girder structure 100 of the first embodiment except that the main girder beam 201, the reinforcing girder beams 202, Includes a transverse girder beam 203, and additionally includes a girder beam connection 204. [ The present embodiment will be described mainly with respect to the girder beam connecting part 204.

The girder beam connection 204 is connected to the reinforced girder beams 202 and the transverse girder beam 203. At this time, the girder beam connecting portion 204 closes the upper and lower spaces formed in the reinforcing girder beams 202 and the transverse girder beam 203. As a result, a part of the girder structure 200 has a box-shaped cross section. That is, the girder structure 200 can provide an increased stiffness to a portion that requires a relatively high rigidity in the bridge 10.

4 is a perspective view showing a part of a girder structure 300 according to a third preferred embodiment of the present invention. 4, the girder structure 300 according to the third preferred embodiment of the present invention is similar to the girder structure 100 of the first embodiment in that the main girder beams 301, the reinforcing girder beams 302 And a transition girder beam 303 but has a transition girder beam 303 of a modified form from the first embodiment in connecting the reinforced girder beams 302 to two or more main girder beams 301. This embodiment will be described with the transition girder beam 303 as a center.

Transition girder beam 303 connects reinforced girder beams 302 to two or more main girder beams 301. At this time, a portion of the transverse girder beam 303 has a shape that branches from at least one of the reinforcing girder beams 302 to connect the two main girder beams 301. On the other hand, in the present embodiment, the transverse girder beam 303 is shown connecting three reinforced girder beams 302 to two main girder beams 301. A portion of the transverse girder beam 302 has a shape that branches from one reinforced girder beam 302 positioned in the middle of the three reinforced girder beams 302 and connects the two main girder beams 301. Further, the transverse girder beam 303 is not formed in two V-shaped shapes as shown in Fig. 1, but is formed in a W-shape without being separated from the main girder beams 301. [

On the other hand, the transition girder beam 303 of the present embodiment is a configuration that can be deformed into various shapes. For example, n connection portions may be formed on one side of the transverse girder beam 303, that is, on the main girder beam side, and n + 1 connection portions may be formed on the other side, that is, the reinforced girder beam side. At this time, main girder beams 301 are connected to one side of the transverse girder beam 303, and reinforced girder beams 302 are connected to the other side of the transverse girder beam 303. Here, n is a natural number.

Specifically, when three main girder beams 301 are connected to the transverse girder beam 303, four reinforced girder beams 302 may be connected to the transverse girder beam 303. At this time, the transition girder beam 303 may have a shape in which three V-shaped shapes are continuously connected. Therefore, the transition girder beam 303 of this embodiment can be formed in a shape in which the V-shaped shapes are continuously connected. At this time, the number of consecutively connected V-shaped beams forming the transverse girder beam 303 corresponds to the number of main girder beams 301.

In addition, the transverse girder beam 303 continuously connects the connection portions on the other side and the connection portions on one side in succession. That is, the transverse girder beam 303 repeats the connection with the reinforced girder beam 302 and the main girder beam 301 along the direction intersecting the longitudinal direction L of the bridge 10.

In the girder structure 300 of the present embodiment, the transitional girder beam 303 connects two or more main girder beams 301 to the reinforced girder beams 302 in an undivided state. This allows the girder structure 300 to be made integral so that it can be used to maintain or increase the stiffness of the fulcrum portion in a reduced number of reinforced girder beams 302.

5 is a perspective view showing a unit girder structure 400 for a bridge according to a preferred embodiment of the present invention. 5, a unit girder structure 400 for a bridge according to a preferred embodiment of the invention includes main girder beams 401, reinforced girder beams 402, transition girder beams 403, Girder beam 404 and can be installed to correspond to the entire length of the bridge 10 by repeatedly connecting along the longitudinal direction L of the bridge 10. [ Although the unit girder structure 400 of the present embodiment is described in the form of adding the extension transition girder beam 404 to the girder structure 300 of the third embodiment, the present invention is not limited to this and may be applied to the girder structure 100 of the first embodiment The extension transition girder beam 404 can be transformed into a shape corresponding to the transition girder beam 103 and applied. The present embodiment will be described mainly with respect to the extended transition girder beam 404, and the description of the remaining components will be omitted with reference to the description of the third embodiment.

The extended transverse girder beam 404 is also connected to the reinforced girder beams 402, like the transitional girder beam 403. At this time, the extension transition girder beam 404 and the transition girder beam 403 are symmetrical with respect to each other with the reinforcing girder beam 402 therebetween. As a result, a number of connecting parts corresponding to the reinforcing girder beam side of the transverse girder beam 403 is formed on one side of the extended transition girder beam 404, that is, on the side of the reinforcing girder beam side. In addition, a number of connecting parts corresponding to the main girder beam side of the transverse girder beam 403 is formed on the other side of the extended transition girder beam 404, that is, on the opposite side. The unit girder structure 400 of the present embodiment can additionally be connected to other unit girder structures of the same configuration via the extension transition girder beam 404. The other unit girder structure is connected to the extended transition girder beam 404 through a number of main girder beams corresponding to the number of connections on the other side of the extended transition girder beam 404.

For example, n connecting portions are formed on the main girder beam side of the transverse girder beam 403 to connect main girder beams 401, and n + 1 connecting portions are formed on the reinforcing girder beam side of the transverse girder beam 403 When the reinforcing girder beams 402 are connected, n + 1 connection parts are formed on one side of the extended transition girder beam 404, that is, on the side of the reinforcing girder beam, and the other side of the extended transition girder beam 404, n connection portions may be formed. Here, n is a natural number.

Specifically, when three main girder beams 401 are connected to the transverse girder beam 403, four reinforced girder beams 402 can be connected to the transverse girder beam 403. At this time, the extended transition girder beam 404 may be connected to the three main girder beams of another unit girder structure while being connected to the four reinforced girder beams 402.

The unit girder structures 400 of this embodiment are repeatedly connected along the longitudinal direction L of the bridge 10 with the same structure to form the bridge 10 and provide a beautiful appearance due to the uniform shape can do.

While the present invention has been described in connection with certain exemplary embodiments, it will be understood by those skilled in the art that various changes may be made without departing from the scope of the present invention. In addition, the description in parentheses in the description of the claims is intended to prevent obscuration of the description, and the scope of the claims of the claims should be construed to include all the items in parentheses.

100, 200, 300: girder structure
101, 201, 301: main girder beam
102, 202, 302: Reinforced girder beam
103, 203, 303: Transition girder beam
204: girder beam connection
400: Unit girder structure
401: Main girder beam
402: Reinforced girder beam
403: Transition girder beam
404: Extended transverse girder beam
10: Bridges
11: Slab
12: Pier

Claims

At least one main girder beam installed in the slab of the bridge along the longitudinal direction of the bridge;
A plurality of reinforcing girder beams installed on the slabs in the same direction as the one or more main girder beams spaced apart from the at least one main girder beam and being greater than the at least one main girder beam supported at the bridge piers; And
And a transition girder beam connecting the reinforced girder beams to the at least one main girder beam.

The method according to claim 1,
The transition girder beam has n connection parts on one side and n + 1 connection parts on the other side (where n is a natural number)
Wherein the at least one main girder beam is connected to one of the connection portions, and the reinforcing girder beams are connected to the other connection portions.

3. The method of claim 2,
Wherein the transition girder beam has a shape in which the connecting portions on the other side and the connecting portions on the one side are continuously and alternately connected.

The structure according to claim 1,
Further comprising a girder beam connection portion connected to the reinforcing girder beams and the transverse girder beams to close the spaces on the upper and lower surfaces formed by the reinforcing girder beams and the transition girder beams.

In the unit girder structure,
N main girder beams installed on the slab of the bridge along the longitudinal direction of the bridge;
N + 1 reinforced girder beams installed on the slabs in the same direction as the main girder beams spaced apart from the main girder beams and supported by the bridge piers;
And n + 1 connection portions are formed on the side of the reinforcing girder beam, the main girder beams are connected to the n connection portions, and the reinforcing girder beams are connected to the (n + 1) A transitional girder beam connected; And
And an extension transition girder beam having n + 1 connection portions formed on the side of the reinforcing girder beam to connect with the reinforcing girder beams and n connection portions on the opposite side,
Wherein the unit girder structure is repeatedly connectable along the longitudinal direction of the bridge, wherein the unit girder structure (where n is a natural number).