KR102232814B1 - Steel pipe connection structure and bridge applying it - Google Patents

Abstract

A steel pipe connection structure is disclosed. According to the present invention, the steel pipe connection structure comprises: a first steel pipe provided at a preset diameter; a second steel pipe provided at least the diameter of the first steel pipe; a first connection unit provided to the first steel pipe; and a second connection unit provided to the second steel pipe, having one side of which the diameter corresponds to the one side of the first connection unit to be connected to the one side of the first connection unit, and having the other side coupled to the second steel pipe.

Description

Steel pipe connection structure and bridge applying it {STEEL PIPE CONNECTION STRUCTURE AND BRIDGE APPLYING IT}

The present invention relates to a steel pipe connection structure and a bridge to which the same is applied, and more particularly, a fast steel pipe is provided inside the steel pipe to prepare for stress that may occur due to the connection of steel pipes with different diameters and different central axes of the connected steel pipes. It relates to a steel pipe connection structure and a bridge to which it is applied.

Steel pipe is a very important element in constructing structures such as bridges. Steel pipes are provided in a certain length for convenience of transportation, and steel pipes are connected and used in the field to apply to the target structure.

As shown in FIG. 1A, the conventional method of connecting steel pipes took a method of making the first steel pipe 1 and the second steel pipe 2 face each other, and then providing connecting bodies 3, 4, and 5 therein, and welding them. .

However, this connection method has a disadvantage in that the welding part is structurally very weak and is disadvantageous to vibration.

Accordingly, as shown in Fig. 1b, structurally unfavorable parts corresponding to the maximum positive moment and maximum positive moment had to be avoided, so there were many difficulties in the steel pipe connection plan and the steel pipe connection suitable for the site conditions, as well as excessive design to ensure structural safety. There was a problem that it was inevitable.

Registered Patent No. 10-0945049 (2010.03.05.)

The present invention has been conceived to solve the problems of the prior art described above, it is possible to efficiently connect steel pipes of different diameters, it is possible to efficiently connect steel pipes of different diameters regardless of the location of the structural weak part, and the arrangement of the connection and It is to provide a steel pipe connection structure and a bridge to which it can be properly constructed according to the site conditions by appropriately reinforcing the inside of the steel pipe in response to the shape and eccentric moment, and to ensure structural safety.

delete

delete

delete

A bridge to which a steel pipe connection structure according to another embodiment of the present invention for solving the above-described technical problem is applied is provided in a portion irrelevant to the region corresponding to the maximum positive moment or the maximum negative moment over the entire length of the bridge. Steel pipe section; A second steel pipe portion provided to have a different diameter from the first steel pipe portion, coupled to the first steel pipe portion to have a different central axis, and provided in a region corresponding to a maximum positive moment or a maximum negative moment; And a connection part connecting the first steel pipe part and the second steel pipe part, wherein the connection part comprises: a first connection part provided in the first steel pipe part; And a second connection part provided on the second steel pipe part, wherein one side of the first connection part has a diameter corresponding to the other side of the first connection part and is connected to the other side of the first connection part, and the other side is connected to the second steel pipe part, and the The second connection unit may include a connection body provided with a diameter corresponding to the connection body of the first connection unit; A circular coupling portion having a size corresponding to the diameter of the second steel pipe portion; And a reinforcing part provided to be coupled to the coupling part and the connection body, the reinforcing part for reinforcing the rigidity of the connection body of the second connection part, wherein the reinforcing part is formed in an'A' shape as a whole, and faces the first connection part. The portion is provided in a combination of a curved type and a straight type, and is formed so that the length in the longitudinal direction of the bridge gradually decreases from the second connecting portion to the circular connecting portion. It is characterized in that a fast steel pipe is provided to resist an additional eccentric moment or an eccentric torsional moment that may occur due to the difference in diameter of the first and second steel pipe portions, and to reinforce the rigidity of the first and second steel pipe portions.

The fast steel pipe is characterized in that it is provided with a concentric shaft with the first steel pipe portion or the second steel pipe portion.

It characterized in that a cross-shaped internal connection portion connecting the fast steel pipe and the first or second steel pipe portion is provided.

It is characterized in that a'+'-type or'X'-type internal connection part is provided through the fast steel pipe and connected to the inner circumferential surface of the first or second steel pipe part.

The fast steel pipe is not provided with a concentric shaft with the first or second steel pipe part, but is provided spaced apart from the center of the vertical axis and the transverse axis of the first or second steel pipe part in a predetermined direction.

The fast steel pipe is characterized in that it is provided to come into contact with an inner upper portion or an inner lower portion of the first or second steel pipe portion.

The fast steel pipe is characterized in that it is provided between the inner circumferential surface of the first or second steel pipe and a central axis of the first or second steel pipe.

According to the present invention, it is possible to efficiently connect steel pipes of different diameters regardless of the location of the structurally weak part, and by appropriately reinforcing the inside of the steel pipe in response to the arrangement and shape of the connection part and the eccentric moment, it can be properly constructed according to the site conditions. And structural safety can be guaranteed.

Figure 1a is a schematic diagram showing a steel pipe connection structure according to the prior art,
1B is an explanatory diagram for explaining a steel pipe connection part according to the prior art,
Figure 2a is a perspective view for showing a steel pipe connection structure according to an embodiment of the present invention,
Figure 2b is a perspective view showing a combined steel pipe connected according to Figure 2a,
3A and 3B are cross-sectional views illustrating a steel pipe connection structure according to an embodiment of the present invention,
4A to 4C are cross-sectional views of a bridge to which a steel pipe connection structure according to an embodiment of the present invention is applied,
5A is a plan view of a bridge to which a steel pipe connection structure according to an embodiment of the present invention is applied, FIG. 5B is a side view of a first embodiment of a bridge to which a steel pipe connection structure according to an embodiment of the present invention is applied, and FIG. 5C is an implementation of the present invention. A side view of the second embodiment of the bridge to which the steel pipe connection structure according to the example is applied,
Figure 6a is a cross-sectional view of the bridge viewed from A2-A2 of Figure 5a,
6B is a cross-sectional view of the bridge viewed from B2-B2 of FIG. 5A,
7A to 7K are cross-sectional views of the bridge viewed from C2-C2 of FIG. 5A.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

Hereinafter, a steel pipe connection structure according to an embodiment of the present invention will be described in detail with reference to the drawings.

2A is a perspective view showing a steel pipe connection structure according to an embodiment of the present invention, FIG. 2B is a combined perspective view showing a steel pipe connected according to FIG. 2A, and FIGS. 3A and 3B are a steel pipe connection according to an embodiment of the present invention. It is a cross-sectional view for showing the structure, and FIGS. 4A to 4C are cross-sectional views of a bridge to which a steel pipe connection structure according to an embodiment of the present invention is applied.

The steel pipe connection structure according to the embodiment of the present invention includes the first steel pipe 20 provided with a preset diameter, the second steel pipe 10 provided with a diameter greater than or equal to the first steel pipe 20, and the first steel pipe 20. The provided first connection part 40 and the second connection part 30 provided in the second steel pipe 10 are included.

The first steel pipe 20 may have a circular cross-section, but the cross-sectional shape is not limited to a circular shape and may be provided in a polygonal shape if necessary.

A first connection part 40 is coupled to one side of the first steel pipe 20. The first connection portion 40 and the first steel pipe 20 may be coupled by welding or a fastening device such as a bolt or a nut, but the coupling method is not limited thereto.

The first connection part 40 is provided on the other side of the first connection body 41 and the first connection body 41 having a circular cross section, and is inserted into and coupled to one side of the first steel pipe 20. 45, and a first fastening portion 47 provided on one side of the first connecting body 41 and coupled with a second fastening portion 37 provided on one side of the second connecting portion 30.

The second connection part 30 is a size corresponding to the diameter of the second connection body 31 and the second steel pipe 10 provided with a diameter corresponding to the diameter of the first connection body 341 of the first connection part 40 It is provided to be coupled to the circular coupling portion 35, the coupling portion 35 and the second connection body 31 having a reinforcing portion that reinforces the rigidity of the second connection body 31 of the second connection portion 30 ( 33).

The first steel pipe 20 and the second steel pipe 10 are coupled so that their central axes are spaced apart from each other, and the connection bodies 41 and 31 of the first and second connection portions are connected to each other by corresponding diameters.

The first fastening part 47 and the second fastening part 37 may be provided to be fastened by a fastening device such as a bolt or nut after being abutted to each other.

4A is a cross-sectional view showing the second steel pipe 10 as viewed from the side. 4A, the outer circumferential surface of the second connecting body 31 is provided to contact the inner circumferential surface of the second steel pipe 10, and a plurality of Four reinforcing portions 39a and 39b are provided.

Here, the reinforcement part 39a is the same as the reinforcement part 33 and is formed in a'b' shape as a whole, but the portion facing the first connection part 40 is provided in a combination of a curved shape and a straight shape, and in the second fastening part 37 It is formed so that the length in the longitudinal direction of the bridge gradually decreases toward the circular coupling part 35.

The reinforcing part 33 not only reinforces the rigidity of the first connection body, but also allows the neutral axis of the second connection part to be connected naturally from the other side of the first connection part to one end of the second steel pipe without experiencing a sudden linear change. Improve safety.

4B shows that the first connection body 41 is connected to the first steel pipe 20, and FIG. 4C shows that the first fastening part 47 and the second fastening part 37 are connected by a fastening device.

According to the present invention, even steel pipes having different diameters can be connected to the upper side of the steel pipe without a step by the connecting portion, and structural instability due to the difference in the neutral axis of the steel pipes can be eliminated by the reinforcing portion.

5A is a plan view of a bridge to which a steel pipe connection structure according to an embodiment of the present invention is applied, FIG. 5B is a side view of a first embodiment of a bridge to which a steel pipe connection structure according to an embodiment of the present invention is applied, and FIG. A side view of the second embodiment of the bridge to which the steel pipe connection structure according to the embodiment is applied, FIG. 6A is a cross-sectional view of the bridge viewed from A2-A2 of FIG. 5A, and FIG. 6B is a cross-sectional view of the bridge viewed from B2-B2 of FIG. 5A, 7A to 7K are cross-sectional views of the bridge viewed from C2-C2 of FIG. 5A.

5A and 5B, in a bridge to which a steel pipe connection structure according to an embodiment of the present invention is applied, the left end and the right end exemplify a bridge having at least three consecutive points provided with a branch 200.

However, it is of course possible to consider a bridge having two spans of continuous beams as shown in FIG. 1B, and in another embodiment, as shown in FIG. 5C, all the diameters of the rape girders are provided with steel pipes of the same diameter, which is equivalent to that of FIG. 5B.

In this case, the area corresponding to the maximum positive moment or the maximum negative moment over the entire length of the bridge corresponds to the point, near the point, and the center of the span.

Accordingly, the region irrelevant to the region corresponding to the maximum positive moment or the maximum positive moment over the entire length of the bridge may correspond to the region near C2-C2 in FIG. 5A, which is between the maximum positive moment and the maximum positive moment. . This region is where the first steel pipe portion is provided, and accordingly, the diameter of the steel pipe of the first steel pipe portion is equal to or less than the diameter of the second steel pipe portion provided in the region corresponding to the maximum positive moment or the maximum negative moment. The second steel pipe portion is a steel pipe portion that is provided in a different diameter from the first steel pipe portion, is coupled to have a different central axis from the first steel pipe portion, and is provided in a region corresponding to the maximum positive moment or the maximum negative moment.

The connection part connects the first steel pipe part and the second steel pipe part, and is provided in the same way as the connection part shown in FIGS. 2A to 3B.

The connection part may be provided in a part corresponding to F.S in FIGS. 5A and 5B, and in the present invention, for convenience of explanation, it is illustrated that the connection part is provided in a part corresponding to part C2-C2.

The first steel pipe part and the second steel pipe part may be provided as a single steel pipe, but in order to prepare for additional stresses (torsion, warpage, etc.) that may occur due to the difference in diameter of the first and second steel pipe parts, the first steel pipe part Fast steel pipes 130a, 130b, and 130c for reinforcing the rigidity of the first and second steel pipe portions are provided inside the and the second steel pipe portion.

6A, a second steel pipe portion, which is a portion corresponding to the maximum positive moment portion corresponding to A2-A2 in FIG. 5A, is provided, and here, a steel pipe 120a, a fast steel pipe 130a provided inside the steel pipe 120a ) Is disposed, and an internal connection part 141 connecting the steel pipe 120a and the fast steel pipe 130a is provided.

The steel pipe 120a and the fast steel pipe 130a are provided with a concentric shaft, and the internal connection part 141 may be provided to connect between the steel pipe 120a and the fast steel pipe 130a in a plurality of portions. However, the present invention is not limited thereto, and the internal connection part 141 may be provided in a'+' type or'X' type while passing through the fast steel pipe 130a and being coupled to the inner circumferential surface of the steel pipe 120a.

Referring to FIG. 6B, in FIG. 5A, a second steel pipe portion corresponding to the vicinity of the maximum minor moment portion corresponding to the cross section B2-B2 is provided, and here, the steel pipe 120b, the fast steel pipe 130b provided inside the steel pipe 120b ) Is disposed, and an internal connection part 143 connecting the steel pipe 120b and the fast steel pipe 130b is provided.

The internal connection part 143 may be provided to connect between the steel pipe 120b and the fast steel pipe 130b in a plurality of portions. However, the present invention is not limited thereto, and the internal connection part 143 may be provided in a'+' type or'X' type while passing through the fast steel pipe 130b and being coupled to the inner circumferential surface of the steel pipe 120b.

7A to 7K are cross-sectional views of the bridge viewed from C2-C2 of FIG. 5A. More specifically, it is a cross-sectional view from the portion C2-C2 in the direction B2-B2, and is not a cross-sectional view of the connection part itself, but a cross-sectional view showing the arrangement of the steel pipe and the fast steel pipe in the steel pipe in the direction B2-B2.

Figure 7a shows that the fast steel pipe (130c) and the steel pipe (120b) are provided with a concentric shaft, and between the steel pipe (120b) and the fast steel pipe (130c), a cross-shaped interior connecting the fast steel pipe (130c) and the steel pipe (120b) The connection part 140c may be provided. A shear connection part t capable of being combined with concrete may be provided on the inner circumferential surface of the steel pipe 120b.

As shown in FIG. 7B, the internal connection portions 140g1 and 140g2 may be provided to pass through the fast steel pipe 130c to form a'+' shape.

As shown in Fig. 7c, any one of the internal connection parts 140h1, 140h2, and 140h3 passes through the fast steel pipe 130c in the vertical direction, and the internal connection parts 140h2 and 140h3 are the upper portions of the fast steel pipe 130c, respectively. And may be provided to be in contact with the lower portion. Similar to FIG. 7C, the inner connection part 140k1 in FIG. 7F is provided to contact the fast steel pipe 130c from both sides in the vertical direction, and the internal connection part 140k2 may be provided to penetrate the fast steel pipe 130c in the transverse direction. .

In addition, as shown in FIG. 7D, the internal connection parts 140i1 and 140i2 penetrate through the fast steel pipe 130c, but may be provided in an'X' shape, and the internal connection parts 140j1 and 140j2 are provided in an'X' shape as shown in FIG. 7E. Doedoe provided in a pair can pass through the fast steel pipe (130c).

7A to 7F show that the fast steel pipe 130c and the steel pipe 120b are provided as concentric shafts, and there is no area in which the slope such as a curve (longitudinal curve, transverse curve) changes, and torsion due to eccentricity is expected. It is prepared where it is not possible.

7G is a case in which the connection portion is provided downwardly with respect to the central axis of the steel pipe 120b, and in order to eliminate structural instability due to eccentricity accordingly, the fast steel pipe 130c is provided skewed from the vertical axis toward the upper side.

In this case, the internal connection portions 140d1, 140d2, and 140d3 may be provided only between the steel pipe 120b and the fast steel pipe 130c, but may be provided to penetrate the fast steel pipe 130c.

7H is a case in which the connection part is provided upwardly with respect to the central axis of the steel pipe 120b, contrary to FIG. 7G, and the fast steel pipe 130c is provided to be skewed from the vertical axis to the lower side in order to eliminate structural instability due to eccentricity. do.

7I is a case where the fast steel pipe 130c is provided to contact the upper inner circumferential surface of the steel pipe 120b, and although not shown, the fast steel pipe 130c may be provided to contact the lower inner circumferential surface of the steel pipe 120b.

On the other hand, in the case of FIG. 7G, as the fast steel pipe 130c is arranged skewed upward, it is preferably a structure for reinforcing the negative moment section, and in the case of FIG. 7H, as the fast steel pipe 130c is skewed downward, preferably It is suitable to reinforce the moment section.

According to the present invention, if the connection portion is arranged at a deflected distance with respect to the center of the vertical axis and the transverse axis, the fast steel pipe 130c may also be arranged at a deflected distance with respect to the center of the vertical axis and the transverse axis to compensate for this. . In addition, according to the present invention, for a structure in which an eccentric moment or an eccentric torsional moment is expected to be generated with respect to the center of the vertical axis and the transverse axis in a curve (longitudinal curve, transverse curve), the fast steel pipe 130c is It is arranged to reduce the occurrence of stress.

7J and 7K illustrate this example. Here, the x-axis corresponds to the horizontal axis, and the y-axis corresponds to the vertical axis. In addition, the large circle represents the steel pipe (120b), the small circle represents the fast steel pipe (130c). In the case of FIG. 7K, it is shown that the fast steel pipe 130c is disposed in the second quadrant, but the center of the fast steel pipe 130c may be disposed on each axis, and of course, it is possible to be provided in any one of the quadrants.

Accordingly, the present invention can efficiently connect steel pipes of different diameters regardless of the location of the structurally weakened part, and appropriately constructed according to the site conditions by appropriately reinforcing the inside of the steel pipe in response to the arrangement and shape of the connection and the eccentric moment. Can be done and structural safety can be guaranteed.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that other specific forms can be easily modified without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

10: second steel pipe
20: first steel pipe
30: second connection
40: first connection
120a: steel pipe
120b: steel pipe
130a: fast steel pipe
130b: fast steel pipe
130c: fast steel pipe

Claims (10)

delete delete delete A first steel pipe portion provided in a portion irrelevant to the region corresponding to the maximum positive moment or the maximum negative moment over the entire length of the bridge; A second steel pipe portion provided to have a different diameter from the first steel pipe portion, coupled to the first steel pipe portion to have a different central axis, and provided in a region corresponding to the maximum positive moment or the maximum negative moment; And a connection part connecting the first steel pipe part and the second steel pipe part,
The connection part may include a first connection part provided in the first steel pipe part; And a second connection part provided on the second steel pipe part, wherein one side of the first connection part has a diameter corresponding to the other side of the first connection part and is connected to the other side of the first connection part, and the other side is coupled to the second steel pipe part, and
The second connection unit may include a connection body provided with a diameter corresponding to the connection body of the first connection unit; A circular coupling portion having a size corresponding to the diameter of the second steel pipe portion; And a reinforcing part provided to be coupled to the coupling part and the connection body, the reinforcing part for reinforcing the rigidity of the connection body of the second connection part, wherein the reinforcing part is formed in an'A' shape as a whole, and faces the first connection part. The portion is provided in a combination of a curved type and a straight type, and is formed so that the length in the longitudinal direction of the bridge gradually decreases from the second fastening portion provided on one side of the second connecting portion to the circular connecting portion,
Resisting an eccentric moment or an eccentric torsional moment that may additionally occur due to the difference in diameter of the first and second steel pipes inside the first and second steel pipes, and reinforces the rigidity of the first and second steel pipes. A bridge applying a steel pipe connection structure, characterized in that a fast steel pipe is provided for this purpose. The method of claim 4,
The fast steel pipe is a bridge to which a steel pipe connection structure is applied, wherein the first steel pipe part or the second steel pipe part and the concentric shaft are provided. The method of claim 5,
A bridge to which a steel pipe connection structure is applied, characterized in that a cross-shaped internal connection part connecting the fast steel pipe and the first or second steel pipe part is provided. The method of claim 5,
A bridge to which a steel pipe connection structure is applied, characterized in that a'+' type or'X' type internal connection part is provided through the fast steel pipe and connected to the inner circumferential surface of the first or second steel pipe part. The method of claim 4,
The fast steel pipe is not provided with a concentric shaft with the first or second steel pipe part, but is provided spaced apart from the center of the vertical axis and the transverse axis of the first or second steel pipe part in a predetermined direction. Bridge with connection structure applied. The method of claim 8,
The fast steel pipe is a bridge to which a steel pipe connection structure is applied, wherein the fast steel pipe is provided so as to be in contact with an inner upper portion or an inner lower portion of the first or second steel pipe portion. The method of claim 8,
The fast steel pipe is a bridge with a steel pipe connection structure, characterized in that provided between the inner circumferential surface of the first or second steel pipe and a central axis of the first or second steel pipe.

Images