KR102262477B1 - Uneven steel strut beam - Google Patents

Abstract

The present invention relates to an uneven steel pipe brace in which corrugated or bent recesses and convex parts are alternately repeatedly formed along the circumferential direction and the uneven steel pipe brace is made of a steel pipe with a closed cross-section with an empty interior. According to the present invention, since the corrugated or bent recesses and convex parts reinforce the inside and/or outside of a plurality of steel pipes that are alternately and repeatedly formed along the circumferential direction, the rigidity of the brace is maximized. In addition, the uneven steel pipe brace can be structurally stabilized by reducing a bending moment even when the bending moment occurs.

Description

Uneven steel strut beam

The present invention relates to a concave-convex steel pipe brace, and more particularly, to a concave-convex steel pipe brace made of a steel pipe in which corrugated or bent recesses and convex parts are alternately and repeatedly formed along the circumferential direction.

In general, when excavating the ground to construct a building or civil engineering structure underground, retaining work is carried out to prevent the collapse of the excavated ground.

As an example of the retaining work, first, H-beams are installed in the ground at regular intervals, and earth plates are installed between the H-beams. In addition, a wale is installed horizontally on the front of the H-beams, and a brace is installed at regular intervals between the wale and the facing wale.

H-beams are widely used as the braces. However, since H-beams have strong and weak axes, reinforcement for the weak axis is required when designing for the compressive load transmitted from the earth wall through the wale, and there is a problem that buckling is easy to occur, especially in the weak axis direction.

In order to solve this problem, a round steel pipe is recently used as a brace.

However, in the case of a round steel pipe, the round surface is slippery, so there is a high risk of safety accidents when installing or connecting braces. Also, equipment that lifts workers must be mobilized during installation or connection work. There is a problem in that the construction cost is high in a situation where many braces are installed.

As a solution to the problems caused by the weak axis, Korean Patent Application Laid-Open No. 10-2004-0100098, 'steel pipe having a corrugated outer circumferential surface' is disclosed. This prior art is a steel pipe (refer to claim 1) in which the outer circumferential surface of the steel pipe is formed in a wavy shape in which a plurality of convex portions and concave portions are alternately connected, and the outer surface of the steel pipe is coated with ceramic.

However, in the prior art, there is a structural problem in that the waveform is spread when refracted by a large compressive force, although some problems such as the problem of the weak axis occurring in the H-shaped steel and the slip occurring in the round steel pipe are solved. In addition, due to the wavy cross-section, the coupling structure with the wale or adjacent steel pipe is complicated, and there is a problem in that the steel pipe is spread or crushed at the coupling site.

Republic of Korea Patent Publication No. 10-2004-0100098

The present invention has been devised to solve the above problems, and an object of the present invention is to solve the problem of reduced rigidity or buckling due to the weak axis by repeatedly forming corrugated or bent main and convex portions alternately along the circumferential direction. It is to provide a concave-convex steel pipe brace.

In addition, as the corrugated or bent recesses and convex parts are formed alternately along the circumferential direction, the problem of safety accidents that may occur during construction due to the round shape and the problem of cost increase due to mobilized equipment are resolved. is to provide.

In addition, by improving the coupling structure connecting the braces to each other and providing a reinforcing member for reinforcing the unevenness, refraction is prevented, and to provide an uneven steel pipe brace having a solid coupling structure.

The concave-convex steel pipe brace according to an example of the present invention may be a steel pipe in which corrugated or bent concave and convex portions are alternately and repeatedly formed along the circumferential direction, and the inside has an empty closed cross-section.

Further comprising a coupling structure provided at one end of the steel pipe to be coupled to an adjacent steel pipe, wherein the coupling structure includes a first member surrounding the end of the steel pipe, a second member sealing the end of the first member, and the It may include a first fastening member passing through the first member and an end of the steel pipe to allow the first member to be coupled to the steel pipe, and a second fastening member passing through the second member and a second member of the adjacent steel pipe to be coupled thereto. have.

and a shear protrusion protruding from the outer surface of the second member or a shear recess formed in a depression, wherein the shear protrusion or shear recess is closely fitted and coupled to the shear recess or shear protrusion of the second member of the adjacent steel pipe. .

The second member may further include a reinforcing protrusion protruding from an inner surface of the second member, and the reinforcing protrusion may have a radial shape or a well square shape extending in a radial direction from the center of the second member.

In the first member, corrugated or bent recesses and convex portions are alternately repeatedly formed along the circumferential direction, and formed in a band shape with an empty closed cross-section, so that the first member can be closely attached to the outside of the steel pipe as a whole.

It may further include a connecting portion for connecting the both convex portions to a gently curved surface or flat surface while covering the outside of the main portion of the first member.

While filling the main portion of the first member may further include a filling portion for connecting the both convex portions in a gentle curved surface or flat surface.

It may further include shear reinforcements installed and coupled to the inner side of the steel pipe along the longitudinal direction.

A first reinforcing material in which the corrugated or bent concave and convex portions are alternately and repeatedly formed along the circumferential direction in a band shape of a closed cross-section with an empty interior, or a belt-like shape of a closed cross-section with an empty interior, further comprising a first reinforcing material , the first reinforcing material as a whole may be characterized in that it is installed in close contact with the outside of the steel pipe to be coupled.

A second reinforcing material in the form of an empty bar inside which is inserted and installed in the entire length in the longitudinal direction to the concave portion of the steel pipe and coupled, the second reinforcing material is installed in close contact with the outside of the concave portion of the steel pipe and can be coupled .

According to the present invention, since the corrugated or bent concave and convex portions are alternately and repeatedly formed along the circumferential direction, the problem of a decrease in rigidity or buckling due to a weak axis can be solved.

In addition, since the corrugated or bent recesses and convex portions are alternately formed alternately along the circumferential direction, the problem of safety accidents that may occur during construction due to the round circle shape and the problem of cost increase due to mobilized equipment can be solved.

In addition, by providing a reinforcing member for improving the coupling structure connecting the braces to each other and reinforcing the irregularities, refraction is prevented, and it is possible to have a strong coupling structure.

1a, 1b is a perspective view of a concave-convex steel pipe brace according to an example of the present invention;
Figure 1c is an exploded perspective view of the coupling structure of the concave-convex steel pipe brace according to an example of the present invention;
Fig. 2 is a longitudinal sectional view of Fig. 1c;
Fig. 3 is a cross-sectional view of Fig. 1c;
4 is a partially enlarged cross-sectional view of FIG. 1c;
5 to 8 are cross-sectional views of the concave-convex steel pipe brace according to an example of the present invention;
9 to 11 are cross-sectional views showing various embodiments of the coupling state of the steel pipe and the first member of the present invention;
12 to 14 are views showing a state in which a reinforcing material is coupled to the steel pipe of the present invention;

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components in each drawing, the same components are given the same reference numerals as much as possible even though they are indicated in different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the components from other components, and the essence, order, or order of the components are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. may be “connected”, “coupled” or “connected”.

1a and 1b are perspective views of a concave-convex steel pipe brace according to an example of the present invention, FIG. 1c is an exploded perspective view of a coupling structure of an uneven steel pipe brace according to an example of the present invention, and FIG. 2 is a cross-sectional view of FIG. 1c, FIG. 3 is a cross-sectional view of FIG. 1C, and FIG. 4 is a partially enlarged cross-sectional view of FIG. 1C. Hereinafter, for convenience of description, the description will be made assuming the bent steel pipe 110 , but it is natural that the description may be applied to the corrugated steel pipe 110 . Also, in the case of the corrugated steel pipe 110, it is not limited to FIG. 1B, and may be applied to a larger number of corrugations.

1 to 4, the concave-convex steel pipe brace 100 according to an example of the present invention is a steel pipe 110 of a closed cross-section in which corrugated or bent recesses and convex parts are repeatedly formed along the circumferential direction, and the inside is empty. ) can be The cross-section of the steel pipe 110 may be formed in a circular shape, a square shape, or the like.

The steel pipe 110 has the same cross-sectional secondary moment in the vertical, left and right directions, so that the problems of the weak axis like the H-beam steel, that is, the problems such as reinforcement for the weak axis or buckling due to the weak axis can be solved. As for the steel pipe 110, the corrugated or bent recessed and convex portions are repeatedly formed along the circumferential direction, thereby increasing the cross-sectional secondary moment, thereby greatly increasing the bending moment compared to the conventional H-beam or round steel. In addition, the steel pipe 110 is prevented from slipping by the corrugated or bent recesses and convex parts, so that the risk of safety accidents during the connecting work of the brace is greatly reduced, and in particular, when the overall shape is square, the safety is greatly increased, so that the construction cost is reduced. Significant savings can be achieved.

The steel pipe 110 may include a shear reinforcing material 120 installed and coupled to the inner side along the longitudinal direction. The shear reinforcement 120 may be installed to be spaced apart along the circumferential direction from the inside of the steel pipe 110 in various shapes, such as an I-type, a T-type. The shear reinforcement 120 may be coupled to the inside of the steel pipe 110 by welding or the like. As the steel pipe 110 is provided with a shear reinforcement 120 on the inside, bending rigidity can be greatly increased. Concrete or the like may be poured on the inside of the steel pipe 110 and used.

It may further include a reinforcing connector 130 (see FIGS. 6 and 8 ) connecting the inside of the shear reinforcement 120 formed in the radial direction. The reinforcing connecting material 130 may be coupled to the shear reinforcing material 120 by welding or the like. The reinforcing connector 130 is formed in a circular shape, a polygonal shape, etc. to bind the steel pipe 110 from the inside, thereby greatly increasing the stability of the steel pipe 110 . That is, it is possible to significantly increase the stability by preventing the steel pipe 110 from cracking, squashing, etc. that may occur while receiving a large compressive force. The reinforcing connector 130 may be installed over the entire length of the steel pipe 110 , installed at regular intervals along the longitudinal direction, or installed only at weak points, eg, the central portion, both ends, and the like.

It may further include a coupling structure 140 provided at one or both ends of the steel pipe 110 to be coupled to the adjacent steel pipe 100 . The coupling structure 140 may include a first member 141 , a second member 142 , a first fastening member 143 , and a second fastening member 144 .

The first member 141 is configured to surround the end of the steel pipe 110 , and may be installed so that the end of the steel pipe 110 is closely fitted.

The second member 142 may seal the end of the first member 141 . The second member 142 may be welded to the first member 141 or integrally formed with the first member 141 . The second member 142 may be in close contact with the end of the steel pipe 110 when the first member 141 is fitted to the end of the steel pipe 110 .

The first fastening member 143 may penetrate the ends of the first member 141 and the steel pipe 110 so that the first member 141 is coupled to the steel pipe 110 . The first fastening member 143 may be a bolt/nut or the like.

The second fastening member 144 may be coupled to the second member 142 through the second member 142 of the adjacent steel pipe 100 . The second fastening member 144 may be a bolt/nut or the like. The second member 142 may be formed to protrude outward so that the second fastening member 144 can be installed. In addition, the second fastening member 144 may be positioned in a corrugated or bent recessed portion formed in the first member 141 .

The second member 142 may include a shear protrusion 145 or a shear recess 146 for coupling with the second member 142 of the adjacent steel pipe 100 . The shear protrusion 145 or the shear recess 146 may be closely fitted into the shear recess 146 or the shear recess 145 of the adjacent steel pipe 100 to be coupled thereto. The shear protrusion 145 or the shear recess 146 can ensure the load transfer of the connection part, prevent misalignment in the connection part, and facilitate the connection operation.

The shear protrusion 145 and the shear recess 146 may protrude or concave on the outer surface of the second member 142 . The end edges of the shear protrusion 145 and the shear recess 146 may have an inclined surface, that is, a cut-out surface to facilitate coupling of the shear protrusion 145 and the shear recess 146 . The shear protrusion 145 and the shear recess 146 may be formed to extend radially from the center of the second member 142 .

A reinforcing protrusion 147 protruding from the inner surface of the second member 142 may be further included to reinforce the second member 142 . The reinforcing protrusion 147 may have a radial shape extending in a radial direction from the center of the second member 142 or a well-rectified shape. The reinforcing protrusion 147 may be welded to or integrally formed with the second member 142 .

Referring to FIG. 9 , the first member 141 has corrugated or bent recesses and convex portions alternately and repeatedly formed along the circumferential direction, and is formed in a band shape of a closed cross-section with an empty interior, so as to be on the outside of the steel pipe 110 as a whole. can be closely attached. This close contact structure not only increases the bonding force between the end of the steel pipe 110 and the first member 141, but also prevents the end of the steel pipe 110 from being crushed in a state where a large compressive force is applied to greatly increase structural stability. can

It may further include a first reinforcing member (not shown) inside the first member 141 and in close contact with the inside of the steel pipe 110 . The first reinforcing member and the first member 141 are closely attached to the ends of the steel pipe 110 from the inside and outside, thereby remarkably increasing the coupling force of the end coupling structure.

Referring to FIG. 10 , both convex portions may be connected to each other by the connecting portion 148 while covering the outside of the main portion of the first member 141 . The connecting portion 148 may be formed as a gentle curved surface or a flat surface connecting both convex portions. The connection part 148 may prevent the first member 141 from being unfolded, thereby remarkably increasing the coupling force of the coupling structure.

Referring to FIG. 11 , the first member 141 may further include a filling part 149 connecting both convex parts with a gently curved or flat surface while filling the main part of the first member 141 . The filling part 149 may prevent the first member 141 from being expanded and crushed, thereby remarkably increasing the coupling force of the coupling structure.

Referring to FIG. 12 , a first reinforcing material 150 having a band shape of a closed cross-section empty inside may be further included while the corrugated or bent main and convex portions are alternately and repeatedly formed along the circumferential direction. The first reinforcing material 150 may be installed in close contact with the outside of the steel pipe 110 as a whole, and may be coupled by welding or bolts. The first reinforcing material 150 may increase rigidity by binding the steel pipe 110 from the outside. The first reinforcing material 150 may include a connecting portion for connecting both convex portions while covering the outside of the concave portion, or a filling portion for connecting both convex portions with a gently curved or flat surface while filling the concave portion. The first reinforcing material 150 may be formed as a single member, slidingly inserted into the steel pipe 110 , and then coupled to the steel pipe 110 by welding, bolts, or the like. In addition, the first reinforcing material 150 may be manufactured to be divided and then installed on the outside of the steel pipe 110 to be coupled by welding, bolts, or the like.

The first reinforcing material 150 may be formed with convex portions protruding inside while having a band shape of a closed cross-section with an empty interior. In this case, the convex part may not correspond to all the main parts of the steel pipe 110 . That is, the convex portion formed inside the first reinforcing material 150 may be formed to be inserted into all the recessed portions of the outer side of the steel pipe 110 , may be formed to be inserted across one, or may be formed to be inserted only at a necessary position.

Referring to FIG. 13 , a second reinforcing material 160 having an empty bar shape may be further included in the main portion of the steel pipe 110 by being inserted and installed over the entire length in the longitudinal direction. The second reinforcing material 160 may be closely inserted into the recess of the steel pipe 110 and coupled by welding or bolts. The inside of the second reinforcing material 160 may be filled.

Referring to FIG. 14 , the first reinforcing material 150 and the second reinforcing material 160 may be installed together. The first reinforcing material 150 and the second reinforcing material 160 are respectively or together installed in the steel pipe 110 at the weak point, thereby remarkably increasing the axial force and the bending rigidity of the steel pipe 110 .

The following describes the manufacturing process and method of use of the present invention concave-convex steel pipe brace 100 configured as described above.

First, according to the design drawing, a plurality of steel pipes 110 having a closed cross-sectional shape in which corrugated or bent recesses and convex portions are repeatedly formed along the circumferential direction and empty inside may be formed. The shear reinforcement 120 may be installed long in the longitudinal direction in the steel pipe 110 . The steel pipe 110 may be formed in a U-shape by welding a one-character, L-shaped unit member or a U-shaped unit member in which the shear reinforcement 120 is bent. The shear reinforcement 120 may be coupled to the inside of the unit member by welding or the like.

Next, in order to connect the steel pipe 110 and the adjacent steel pipe 100 , the coupling structure 140 may be coupled to one end of the steel pipe 110 and the other end of the adjacent steel pipe 100 , respectively. The first member 141 of the coupling structure 140 may be coupled around the end of the steel pipe 110 . The first member 141 of the coupling structure 140 is formed with corrugated or bent recesses and convex parts repeatedly along the circumferential direction on the outside of the steel pipe 110 in which corrugated or bent recesses and convex parts are repeatedly formed along the circumferential direction. and can be closely adhered to

Both convex portions of the first member 141 may be welded to the first member 141 by connecting portions 148 to cover the outside of the concave portion of the first member 141 , and the concave portion of the first member 141 may be welded to the first member 141 . The filling part 149 may be combined, and may be combined by welding. The connecting part 148 and the filling part 149 may be integrally formed with the first member 141 .

After inserting the first member 141 of the coupling structure 140 between one end of the steel pipe 110 and the other end of the adjacent steel pipe 100 through the above process, the first member 141 and the end of the steel pipe 110 . can be fixed by fastening with the first fastening member 143 of the bolt/nut. The first member 141 of the steel pipe 110 is coupled to the second member 142 from which the shear protrusion 145 protrudes, and the shear recess 146 is depressed in the first member 141 of the adjacent steel pipe 100 . The second member 142 may be coupled.

When the steel pipe 110 to which the first member 141 is fixed and the adjacent steel pipe 100 are positioned on the same line and the steel pipe 110 is moved in the adjacent steel pipe 100 direction, it is coupled to the steel pipe 110 . The second member 142 is in close contact with the second member 142 coupled to the adjacent steel pipe 100 . At this time, the shear protrusion 145 protruding from the second member 142 of the steel pipe 110 is coupled to the shear recess 146 recessed in the second member 142 of the adjacent steel pipe 100 to be easily coupled. can Here, since the shear protrusion 145 or/and the shear recess 146 end has an inclined surface, it can be more easily combined.

When the shear protrusion 145 is coupled to the shear recess 146 and the second member 142 of the steel pipe 110 is in close contact with the second member 142 of the adjacent steel pipe 100, the steel pipe 110 and The second member 142 of the adjacent steel pipe 100 may be fastened to the second fastening member 144 by the second fastening member 144 . By fastening and fixing the second member 142 with the second fastening member 144 , welding is excluded and residual stress can be excluded, and manufacturing and construction can be simplified.

It is possible to support the retaining wall by combining the concave-convex steel pipe brace 100 produced by the above process to the wale installed on the retaining wall.

In addition, the first reinforcing material 150 may be installed at a weak point such as an end portion or a central portion of the steel pipe 110 . In addition, the second reinforcing material 160 may be inserted into the recess of the steel pipe 110 to be installed. In addition, the first and second reinforcing materials 150 and 160 may be installed together in the steel pipe 110 , and the steel pipe 110 may have bending stiffness and axial resistance by the first and second reinforcing materials 150 and 160 . This could be increased even more.

In the above, even though it has been described that all components constituting the embodiment of the present invention are combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, within the scope of the present invention, all the components may be configured or operated by selectively combining one or more components. In addition, terms such as "comprises", "comprises" or "have" described above mean that the corresponding component may be inherent, unless otherwise stated, excluding other components. Rather, it should be construed as being able to further include other components. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: concave-convex steel pipe support 110: steel pipe
120: shear reinforcement 130: reinforcement connection material
140: coupling structure 141: first member
142: second member 143: first fastening member
144: second fastening member 145: shear protrusion
146: shear recess 147: reinforcing protrusion
148: connecting portion 149: filling portion
150: first reinforcing material 160: second reinforcing material

Claims (10)

a steel pipe of a closed cross-sectional shape in which corrugated or bent concave and convex portions are alternately and repeatedly formed along the circumferential direction;
Further comprising a coupling structure provided at one end of the steel pipe to be coupled to an adjacent steel pipe,
The coupling structure includes a first member surrounding the end of the steel pipe, a second member sealing the end of the first member, and a first member passing through the end of the first member and the steel pipe so that the first member is coupled to the steel pipe. A first fastening member, and a second fastening member that penetrates through the second member and the second member of the adjacent steel pipe;
and a shear protrusion protruding from the outer surface of the second member or a shear recess formed in a depression, wherein the shear protrusion or shear recess is fitted and coupled with the shear recess or shear protrusion of the second member of the adjacent steel pipe,
The end edge of the shear protrusion and the shear recess is formed with a cut-out surface to facilitate coupling of the shear protrusion and the shear recess,
Further comprising a reinforcing protrusion protruding from the inner surface of the second member, the reinforcing protrusion has a radial shape or a well-defined shape extending in a radial direction from the center of the second member
In the first member, corrugated or bent recesses and convex portions are alternately and repeatedly formed along the circumferential direction, and are formed in a band shape of a closed cross-section with an empty interior to be in close contact with the outside of the steel pipe,
A connecting part for connecting both convex parts to a curved or flat surface while covering the outside of the concave part of the first member, or a filling part for connecting both convex parts to a curved or flat surface while filling the concave part of the first member,
A first reinforcing material in which the corrugated or bent concave and convex portions are alternately and repeatedly formed along the circumferential direction in a band shape of a closed cross-section with an empty interior, or a belt-like shape of a closed cross-section with an empty interior, further comprising a first reinforcing material, and ,
The first reinforcing material is a concave-convex steel pipe brace, characterized in that it is installed in close contact with the outside of the steel pipe and coupled.
delete delete delete delete delete delete The method according to claim 1,
Concave-convex steel pipe support further comprising shear reinforcements installed and coupled to the inner side of the steel pipe along the longitudinal direction. delete The method according to claim 1,
Further comprising a second reinforcing material in the shape of an empty bar inside which is inserted and installed in the entire length in the longitudinal direction to the main portion of the steel pipe,
The second reinforcing material is a concave-convex steel pipe brace, characterized in that it is installed and coupled to the outside of the concave portion of the steel pipe.

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