KR20230149070A - Connecting structure of different girders - Google Patents

Abstract

The present invention is a structure for connecting heterogeneous girders, comprising: a bridge having a first girder; A bridge located adjacent to the first girder and having a second girder; And it provides a connection structure of heterogeneous girders including a plurality of steel bars installed on both sides of the connection area between the first girder and the second girder.

Description

Connecting structure of heterogeneous girders {CONNECTING STRUCTURE OF DIFFERENT GIRDERS}

The present invention relates to girders, and more specifically, to the connection structure of heterogeneous girders.

As shown in FIG. 1, a bridge consists of lower structures such as foundation slabs, abutments, and piers, and upper structures such as girders and slabs that rise above them.

These bridges are built over rivers or the sea, or are used in the construction of subways, railroads, or duplex underground shopping malls.

RC (Reinforced Concrete) girders can be used by inserting reinforcing bars with strong tensile force. However, RC girders are difficult to apply to long bridges because the load of the concrete itself is too large.

To compensate for the shortcomings of RC girders, the application of PSC (Pre-Stressed Concrete) girders can be considered. PSC girders are bridges that apply prestress by applying rigidity to RC girders and can be applied to a variety of bridges from 50m to over 100m.

To make the span longer, SRC (Steel Reinforced Concrete) girders are also used.

SRC girders are a composite structure in which reinforcing bars are placed on a steel frame and covered with concrete. They are used in areas where construction is difficult with RC and PSC girders, such as roads, railways, and intersections. The low girder height ensures low noise and rapid construction. It is applied to viaducts that require construction.

SRC girders can reduce the height of the girder and can be applied to long-span bridges. Since the top dead load is small, the lower structure can be compact, and it has the advantages of minimizing maintenance and improving economic efficiency. However, a curing period for the slab and a beam production period are required, and the large amount of steel materials such as crossbeams and low rigidity cause large vibration and deflection, and the thickness of the floor plate is thin, making it structurally unstable and difficult to place reinforcement.

In order to utilize the advantages of each of the above-described girders and compensate for their disadvantages, there are cases where the individual girders are connected and used. At this time, a stable and simple connection structure is needed in the joint section of each girder with different structures.

The present invention is intended to solve the above-described problems, and seeks to provide a structure for stably and easily connecting girders having different structures.

The present invention is a structure for connecting heterogeneous girders, comprising: a bridge having a first girder; A bridge located adjacent to the first girder and having a second girder; And it provides a connection structure of heterogeneous girders including a plurality of steel bars installed on both sides of the connection area between the first girder and the second girder.

A plurality of first through holes are formed on both sides of the end of the first girder, and a plurality of second through holes are formed on both sides of the end of the second girder, and the plurality of first through holes and the plurality of second through holes are formed on both sides of the end of the second girder. The holes are provided facing each other at the same height, and the single steel rod can be inserted into one of the plurality of first through holes and one of the plurality of second through holes.

One steel rod may include a first part and a second part arranged in a horizontal direction, the first part may be inserted into the first through hole, and the second part may be inserted into the second through hole.

The steel rod further includes a connection part connecting the first part and the second part, and the connection part has a connection hole formed therein, and the inner diameter of the connection hole is the outer diameter of the first part and the outer diameter of the second part. It could be more than that.

The inner surface of the connection hole inside the connection part is the shape of the inner surface of the female screw, the shape of the part inserted into the connection part among the first part and the second part is the shape of the outer surface of the male screw, and the connection hole of the connection part has the shape of the inner surface of the female screw. The first part and the second part can be inserted and fixed while rotating.

A first steel bar and a second steel bar having different heights in the vertical direction are provided, and the first steel bar and the second steel bar may at least partially overlap in the vertical direction.

The first through hole of the first girder and the second through hole of the second girder are formed in the first wing and the second wing, respectively, and the first wing and the second wing are respectively formed in the first body of the first girder. and may be formed to protrude from the second body of the second girder.

A plurality of first through holes formed in the first wing portion of the first girder may overlap each other in a vertical direction, and a plurality of second through holes formed in the second wing portion of the second girder may overlap each other in a vertical direction.

The side surface of the first body of the girder and the side surface of the second body of the second girder are each inclined with respect to the vertical direction, and the plurality of first through holes formed in the first wing portion of the first girder are non-overlapping in the vertical direction. And, the plurality of second through holes formed in the second wing portion of the second girder may non-overlap each other in a vertical direction.

The first girder may be a Pre-Stressed Concrete (PSC) girder, and the second girder may be a Steel Reinforced Concrete (SRC) girder.

According to the connection structure of heterogeneous girders according to the present invention, through holes are formed in each of the heterogeneous girders of adjacent bridges, and steel rods are inserted and fastened into the through holes, so that the heterogeneous girders can be firmly coupled.

In this structure, when there are several construction companies, such as a large-scale underground complex space, each construction company can use different types of girders, and in this case, the underground complex by firmly combining the different types of girders using the connection structure of the heterogeneous girders described above. Space can be constructed stably.

Figure 1 is a diagram showing the structure of a bridge,
Figure 2 is a diagram briefly showing the PSC girder,
Figure 3 is a diagram briefly showing an SRC girder,
Figure 4 is a diagram showing a bridge where a first girder and a second girder are adjacent to each other,
Figure 5 is a view showing a first through hole formed at the end of the first girder and a second through hole formed at the end of the second girder;
Figure 6 is a view showing the first part, the second part, and the connection part of the steel bar;
Figure 7 is a diagram showing a connection hole formed inside the connection part of Figure 6,
Figure 8 is a diagram showing a plurality of steel bars installed at the end of the first girder and the end of the second girder,
Figure 9 is a view showing in detail the shape of the first wing portion of the first girder,
Figure 10 is a view showing in detail the shape of another embodiment of the first through hole formed in the first wing portion of the first girder.

Hereinafter, some embodiments of the present invention will be described in detail through illustrative drawings. When adding reference numerals to components in each drawing, it should be noted that identical components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted.

In the description of the embodiment according to the present invention, in the case where each element is described as being formed "on or under", (or under) includes both elements that are in direct contact with each other or one or more other elements that are formed (indirectly) between the two elements. Additionally, when expressed as “on or under,” it can include not only the upward direction but also the downward direction based on one element.

The present invention discloses a connection structure of heterogeneous girders, where a bridge having a first girder and a bridge having a second girder are located adjacent to each other, and a plurality of devices are provided on both sides of the connection area for stable connection of the first girder and the second girder. Steel rods can be installed.

The first girder and the second girder may be different types of girders. For example, the first girder may be a Pre-Stressed Concrete (PSC) girder, and the second girder may be a Steel Reinforced Concrete (SRC) girder.

Figure 2 is a diagram briefly showing a PSC girder, and Figure 3 is a diagram briefly showing an SRC girder.

As shown in FIG. 2, the PSC girder can insert steel wire or other tendons into concrete in the longitudinal direction. And, as shown in FIG. 3, the SRC girder can have reinforcing bars and steel frames inserted into the concrete.

In the case of spaces such as very large complex shopping malls or railways, a single type of girder may not be used in a bridge, but heterogeneous girders may be used. In this case, in order to utilize the strengths of each girder and complement the shortcomings, each girder is used. Girders can be firmly connected using steel bars. In addition, a plurality of through holes are formed in each of the girders, and a steel rod is inserted into each of the plurality of through holes, so that the girders can be firmly connected.

Figure 4 is a view showing a bridge in which a first girder and a second girder are adjacent, and Figure 5 is a view showing a first through hole formed at the end of the first girder and a second through hole formed at the end of the second girder, FIG. 6 is a view showing the first part, the second part, and the connection part of the steel bar, FIG. 7 is a view showing the connection hole formed inside the connection part of FIG. 6, and FIG. 8 is a view showing the end of the first girder and the second girder. This is a drawing showing a plurality of steel bars installed at the end of a girder.

As shown in Figure 4, the first girder on the first pier and the second girder on the second pier are adjacent, and the first girder and the second girder are physically in direct contact with the concrete or are spaced apart as shown. It could be.

As shown in FIG. 5, a plurality of first through holes may be formed on both sides of the end of the first girder in a direction adjacent to the second girder. At this time, protruding portions are formed on both sides of the ends of the first girder. The protruding portions can be referred to as first wings, and a plurality of first through holes are formed in the vertical direction in the first wings. It can be. The first wing portion is formed on both sides of the end of the first girder, and in FIG. 5, only one side of the end is shown for convenience.

And, the second girder may have a plurality of second through holes formed on both sides of the end portion in a direction adjacent to the first girder. At this time, protruding portions are formed on both sides of the end of the second girder, and the protruding portions can be referred to as second wings, and a plurality of second through holes are formed in a vertical direction in the second wings. It can be. The second wing portion is formed on both sides of the end of the second girder, and in FIG. 5, only one side of the end is shown for convenience. Additionally, the first wing portion and the second wing portion may form an integrated structure with the main body of the first girder and the second girder, respectively.

Additionally, in FIG. 5 , four first through holes may be formed to overlap each other in the vertical direction, and four second through holes may be formed to overlap each other in the vertical direction. Here, the vertical direction may mean the direction of gravity when a bridge including a first girder and a second girder is installed.

And, in FIG. 5, the four first through holes and the four second through holes may be formed to face each other with the same height, and a plurality of steel rods may be inserted into the first through holes and the second through holes in a horizontal direction. This is to do it.

The vertical cross-section of the first through hole and the second through hole may be circular, but is not necessarily limited thereto.

And, when the above-described cross-sections of the first through hole and the second through hole are circular, the size of the inner diameter (R) is the size (r2) of the outer diameter of the end of the first part and the end of the second part of the first steel bar, which will be described later. It's the same, but it can be a little bigger. Here, the size (r2) of the outer diameter of the end of the first portion and the end of the second portion of the above-described first steel bar may be 32 to 36 millimeters.

The steel bar may be made of a metal material, and the shape of the outer cross section of the steel bar may be the same as the shape of the cross section in the vertical direction of the first through hole and the second through hole.

The steel bar may be made of an integrated structure having the same outer diameter, but may also include a connecting part, a first part, and a second part, as shown in FIG. 6.

Referring to FIG. 6, the first steel rod may include a first part and a second part arranged in a horizontal direction, and a connection part connecting the first part and the second part. At this time, the end of the first part of the first steel bar may be inserted into the first through hole formed in the above-described first girder, and the end of the second part may be inserted into the second through hole to be formed in the above-described second girder. You can.

The connection portion may have a circular shape, as shown in FIG. 7, but is not limited thereto. A connection hole is formed in the connection part, and the above-described first and second parts can be inserted into the connection hole.

In Figure 7, the inner surface of the connection hole formed in the connection portion may be in the shape of a female thread (a). And, in FIG. 6, the shape of the part inserted into the connection part among the first part and the second part may be the shape of the outer surface of the external screw.

In addition, the inner diameter (r3) of the connection hole of the connection part is the same as the outer diameter (r2) of the first part and the second part, and the male thread-shaped ends of the first part and the second part rotate in the connection hole of the connection part. It can be inserted, coupled, and fixed. And, the outer diameter r1 of the connection part may be larger than the outer diameter r2 of the first part and the second part.

As shown in Figures 6 and 7, if the first steel bar is not an integrated structure but is formed in a structure that is easy to combine and separate, the first through hole of the first girder and the second girder are formed as described later. When inserting the first steel bar into the second through hole, the separated first and second parts are inserted into the first through hole and the second part, respectively, and then the first and second parts are inserted through the connection part. By combining, the convenience of the process can be increased.

Figure 8 shows another fastening structure of a steel bar.

As shown, a plurality of first to third through holes are formed in each of three adjacent first to third girders. In addition, the four steel bars installed from top to bottom may be referred to as the first steel bar, the second steel bar, the third steel bar, and the fourth steel bar in that order.

Here, the first steel bar and the third steel bar are inserted into the first through hole and the second through hole to solidly couple the first girder and the second girder. And, the second steel bar and the fourth steel bar are inserted into the second through hole and the third through hole to strengthen the connection between the second girder and the third girder. The combination of these first to fourth steel bars combines the first girder and the second girder, and the second girder and the third girder in a non-overlapping manner in the vertical direction, making the combination of the first to third girders more robust. You can.

Figure 9 is a diagram showing the shape of the first wing portion of the first girder in detail.

The first wing wall may be at least 300 millimeters wide and at least 200 millimeters thick. The width and thickness of the above-described first wing wall may be the minimum thickness for stable fastening of the steel bar.

Figure 10 is a view showing in detail the shape of another embodiment of the first through hole formed in the first wing portion of the first girder.

In FIG. 9, the plurality of first through holes formed in the first body of the first girder overlap each other in the vertical direction, but in FIG. 10, the plurality of first through holes formed in the first wing portion of the first girder are partially perpendicular to each other. There may be non-overlapping directions. Additionally, when a first girder and a second girder are adjacent to each other, a plurality of second through holes formed in the second wing portion of the second girder may partially overlap each other in a vertical direction.

That is, as shown in FIG. 10, the first through holes are composed of 1-1 through holes to 1-4 through holes from top to bottom, and in this case, the 1-1 through holes and the 1-3 through holes are They overlap in the vertical direction, and the 1-2 through hole and the 1-4 through hole overlap in the vertical direction, and the virtual line where the 1-1 through hole and the 1-3 through hole overlap in the vertical direction are The 1-2 through hole and the 1-4 through hole may non-overlap in the vertical direction with a virtual line that overlaps in the vertical direction. This structure allows the steel bars fastened to the 1-1st to 1-4th through-holes to be staggered in the vertical direction, thereby strengthening the strength of the steel bars with adjacent girders.

The connection structure of the above-described heterogeneous girders can be used in the construction of an underground complex space, and the above-described connection structure can be used in the connection section of three or more heterogeneous girders. For example, an underground complex space may be formed from the ground to the basement, and subways, railroads, and shopping malls may be built on multiple underground floors. The floor of each floor may be structured like a bridge. In the case of a large underground complex space, there may be multiple construction companies, so each construction company can use different types of girders, and in this case, the connection structure of the heterogeneous girders described above. By firmly combining different types of girders, an underground complex space can be safely constructed.

In the above, even though all the components constituting the embodiment of the present invention have been described as being combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, as long as it is within the scope of the purpose of the present invention, all of the components may be operated by selectively combining one or more of them. In addition, terms such as “include,” “comprise,” or “have” described above mean that the corresponding component may be present, unless specifically stated to the contrary, and thus do not exclude other components. Rather, it should be interpreted as being able to include other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the present invention.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. Accordingly, the embodiments posted in the present invention are not intended to limit the technical idea of the present invention, but rather to explain it, and the scope of the technical idea of the present invention is not limited by these examples. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

R: Size of the inner diameter of the first and second through holes
r1: Outer diameter of connection part
r2: outer diameter of the first part and the second part
r3: inner diameter of connection hole

Claims (10)

As a connection structure of heterogeneous girders,
A bridge having a first girder;
A bridge located adjacent to the first girder and having a second girder; and
A connection structure of heterogeneous girders including a plurality of steel bars installed on both sides of the connection area of the first girder and the second girder. According to claim 1,
A plurality of first through holes are formed on both sides of the end of the first girder, and a plurality of second through holes are formed on both sides of the end of the second girder,
The plurality of first through holes and the plurality of second through holes are provided facing each other at the same height,
A connection structure of heterogeneous girders in which the one steel bar is inserted into one of the plurality of first through holes and one of the plurality of second through holes. According to clause 2,
The one steel bar includes a first part and a second part arranged in a horizontal direction, the first part is inserted into the first through hole, and the second part is a heterogeneous girder inserted into the second through hole. connection structure. According to clause 3,
The steel rod further includes a connection part connecting the first part and the second part,
A connection hole is formed inside the connection portion,
A connection structure of heterogeneous girders in which the inner diameter of the connection hole is greater than or equal to the outer diameter of the first part and the outer diameter of the second part. According to clause 4,
The inner surface of the connection hole inside the connection part is the shape of the inner surface of the female thread,
The shape of the part inserted into the connection part among the first part and the second part is the shape of the outer surface of the male screw,
A connection structure of heterogeneous girders in which the first part and the second part are rotated and inserted into the connection hole of the connection part and fixed. According to claim 1,
A first steel bar and a second steel bar are provided with different heights in the vertical direction,
A connection structure of heterogeneous girders in which the first steel bar and the second steel bar are at least partially non-overlapping in the vertical direction. The method according to any one of claims 2 to 6,
The first through hole of the first girder and the second through hole of the second girder are formed in the first wing portion and the second wing portion, respectively,
A connection structure of heterogeneous girders in which the first wing portion and the second wing portion are formed by protruding from the first body of the first girder and the second body of the second girder, respectively. According to clause 7,
A plurality of first through holes formed in the first wing portion of the first girder overlap each other in a vertical direction,
A connection structure of heterogeneous girders in which a plurality of second through holes formed in the second wing portion of the second girder overlap each other in the vertical direction. According to clause 7,
The side surface of the first body of the first girder and the side surface of the second body of the second girder are each inclined with respect to the vertical direction,
A plurality of first through holes formed in the first wing portion of the first girder do not overlap each other in a vertical direction,
A connection structure of heterogeneous girders in which a plurality of second through holes formed in the second wing portion of the second girder do not overlap each other in the vertical direction. The method according to any one of claims 1 to 6,
A connection structure of different types of girders, where the first girder is a PSC (Pre-Stressed Concrete) girder and the second girder is an SRC (Steel Reinforced Concrete) girder.