KR101284514B1 - Stiffener for preventing flange buckling of H shaped steel - Google Patents

Abstract

The present invention can be installed without welding work, and can be attached and detached regardless of the installation position of the H-shaped steel is easy to respond to changes in the position of the earth anchor or the installation of the brace in the field, H-shaped steel excellent in compressive strength In order to provide a stiffener for preventing the flange buckling of, according to a preferred embodiment of the present invention, in the stiffener for preventing the flange buckling of the H-shaped steel used for supporting the belt or brace, the stiffeners facing each other At least one bracing steel tube positioned between both flanges to resist compression force; Characterized in that it consists of a steel pipe support clip provided on both ends or one end of the bracing steel pipe to support the bracing steel pipe to the H-beam.

Description

Stiffener for preventing flange buckling of H shaped steel}

The present invention relates to a stiffener for preventing the buckling of the flange occurs in the H-shaped steel used for supporting the belt or brace used in the construction of the clam wall, in particular excellent in compressive strength, can be installed without welding work The present invention relates to a stiffener for preventing flange buckling of an H-shaped steel that is easy to cope with a positional change of an earth anchor or a change of installation of a brace in the field.

In order to build the foundation of the building in the basement, the excavation work is carried out to excavate the ground, and the earthquake is carried out for the purpose of stabilizing the surrounding ground and ordering the groundwater. In particular, due to factors such as securing the land area ratio and increasing land prices in urban areas, it is common to construct adjacent to the land boundary line when digging work, and to deepen underground excavation depth as a way to effectively utilize the narrow land, In case of construction adjacent to the land boundary line, it is required to install the retaining wall to protect the existing facilities or adjacent buildings.

The construction method of the earthen wall is to install the steel pile in the ground and to excavate and install the earth plate while going down the ground, the steel plate pile method to install the pile pile in the ground by engaging the joint part of the sheet pile, and to make the soil cement column continuously There is a method of placing concrete material by inserting reinforcement in it, or digging a wall hole in the ground, and placing concrete by inserting a steel frame. In addition, an earth anchor or a brace method is used as the support structure for the self-supporting of the retaining wall.

At this time, the earth anchor method is installed on the band made of H-shaped steel installed in the steel pile in the transverse direction, is connected to the strand wire fixed in the ground to support the earth wall using the earth anchor bracket to transfer the earth pressure to the band. Therefore, the H-beams are subjected to strong compressive force at the anchorage part. When the compressive force exceeds the flange-side plate buckling compressive strength of the H-beam, the flanged steel sheet causes an out-of-plane deformation. This phenomenon also occurs when the braces are supported by the H-beams and are exhibiting braces.

Therefore, in the related art, in order to prevent the flange buckling of the H-shaped steel, it has been solved by attaching a flat plate (also called 'steel stiffener') to the flange by welding. However, this method has a problem that a separate welding attachment work is required when installing the plate. In addition, the band made of H-beams has a disadvantage that it can not easily cope with the change of the position of the earth anchor or the position of the mounting section of the brace in the field by reuse.

In addition, it has a problem of limiting the use of the H-shaped steel in the future by installing a stiffener for reinforcement in a facility temporarily completed using the H-shaped steel.

Therefore, the present invention was devised in view of the above circumstances, and can be installed without welding work, and can be attached and detached regardless of the installation position of the H-beam to cope with changes in the position of the earth anchor or installation of the brace in the field. It is an object of the present invention to provide a stiffener for preventing flange buckling of an H-shaped steel which is easy to perform and has excellent compressive strength.

According to a preferred embodiment of the present invention,

In the stiffener to prevent the flange buckling of the H-shaped steel used for supporting the belt or brace,

One or more bracing steel pipes positioned between both flanges of the H-beams facing each other to resist compression forces;

A steel pipe support clip provided at both ends or one end of the bracing steel pipe to support the bracing steel pipe in the H-beam;
In addition, the steel pipe support clip,
An inner band support plate joined to the bracing steel pipe and in contact with the flange inner surface of the H-beam;
An outer side strip support plate which faces the inner side of the flange of the H-beam and faces the inner side strip support plate;
An inner stripe support plate and an outer stripe support plate, each comprising a flange straddle connecting the upper end;
The steel pipe support clip is characterized in that the gap gripper which is inserted downward through the long hole of the flange stepped jaw is further installed.

Preferably the bracing steel pipe is characterized in that it is made of any one of a circular pipe, elliptical pipe, square pipe.

Preferably the bracing steel pipe is characterized in that the concrete mortar is filled.

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In addition, the outer band support plate is characterized in that the one or more adhesion protrusions protruding toward the inner band support plate is further formed.

In addition, the steel pipe support clip is characterized in that the gap gripper is further installed is inserted downward from the flange step.

In addition, the inner band support plate is characterized in that it further includes an elastic bending portion to cause the spring behavior.

In addition, the inner stripe support plate is characterized in that the compression plate is further provided with a convex surface is located as the outer stripe support plate.

In addition, the outer band support plate is removed from the steel pipe support clip of any one of the steel pipe support clip of both ends.
In addition, the outer band support plate and the flange stepping jaw is characterized in that the steel pipe support clip of any one of the steel pipe support clip of both ends is removed.

In addition, the outer band support plate and the flange latching jaw is removed from the steel pipe support clip of either of the steel pipe support clips of both ends, and at the same time the inner band support plate is characterized in that is supported on the web of the H-shaped steel.

In addition, the inner brace steel pipe with a relatively small cross-sectional area is installed inside the brace steel pipe.

At this time, the inner bracing steel pipe may be made of any one of a circular pipe, an elliptical pipe, and a square pipe.

In addition, concrete mortar may be filled between the support steel pipe and the inner support steel pipe.

According to the stiffener for preventing flange buckling of the H-shaped steel according to the present invention, the steel pipe support clip is provided at both ends of the bracing steel pipe can be used detachably regardless of the installation position. Therefore, it is easy to cope with the change of the position of the earth anchor and the installation change of the brace in the field, and the welding work is unnecessary and the installation workability is improved.

In addition, when the mortar is filled with concrete mortar, the compressive strength is improved, which can effectively prevent the buckling of the H-shaped flange.

In addition, in the case of the double pipe with inner bracing pipe installed in the bracing steel pipe, the cross section moment and the cross sectional resistance strength are increased to prevent the increase of compression and bending resistance as well as the buckling of the bracing steel pipe.

In addition, when the elastic steel support means is provided in the support steel pipe support club can resist the compression behavior can effectively absorb the flange axial pressure.

In addition, since the temporary stiffener for reinforcement does not need to be installed in a facility that is temporarily completed using H-beams, H-beams in the future have an advantage of maintaining an intact appearance without restricting use.

The following drawings, which are attached in the present specification, illustrate exemplary embodiments of the present invention, and together with the detailed description of the present invention, serve to further understand the technical spirit of the present invention. It should not be construed as limited.
1 is a perspective view of a stiffener according to an embodiment of the present invention.
2 is a front view of the stiffener according to an embodiment of the present invention.
Figures 3a to 3d is a diagram illustrating various cross-sectional shapes of the brace steel pipe applied to the stiffener of the present invention.
Figure 4 is a state of use of the stiffener according to an embodiment of the present invention.
Figure 5 is a view showing a close projection provided on the support pipe steel pipe applied to the present invention.
Figure 6a is a perspective view of the steel pipe support clip and the gap gripper applied to the present invention.
Figure 6b is an assembled state of the gap gripper applied to the present invention.
7 is a front view of the steel pipe support clip having an elastic bending portion according to the present invention.
8 is a front view of the steel pipe support clip is installed compression plate according to the present invention.
Figure 9 is a modified example of the steel pipe support clip according to the present invention.
10 is another modified example of the steel pipe support clip according to the present invention.
11 is another modified example of the steel pipe support clip according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

The stiffener 10 according to the present invention is used for the main purpose of preventing the buckling of the flange of the H-shaped steel (1) used for supporting the belt or brace used in the construction of the wall.

In addition, the present invention has not only the purpose of preventing buckling on the flange of the H-shaped steel (1), but also has the effect of reducing the fabrication. This is to overcome the inconvenience of installing additional welding reinforcement stiffener when changing the stiffener position.

1 and 2, the stiffener 10 is connected to both ends of the brace steel pipe 100 and the brace steel pipe 100 to the steel pipe support clips (110, 110) to detachable from the H-shaped steel (1) Consists of.

The support steel pipe 100 is positioned between the flanges 1b and 1b facing each other of the H-shaped steel 1 and is installed to resist the compressive force. At this time, the bracing steel pipe 100 may be installed more than one. For example, when two bracing steel pipes 100 are installed, they may be positioned side by side at the top and bottom, respectively, and may be arranged in a triangular shape when three are installed. Here, the compressive force can be understood as the force generated by the tensile force of the strand 5 acting on the earth anchor 3 on the H-shaped steel 1 as shown in FIG. 4 when constructing the retaining wall, and when it is connected to the brace, it acts on the brace. It can be understood as the axial pressure in the longitudinal direction. The H-shaped steel 1 is a state supported by the steel pile 2 here.

Bracing steel pipe 100 has a hollow shape penetrating in the longitudinal direction therein. Therefore, the bracing steel tube 100 may be made of, for example, a circular tube, an elliptic tube, a square pipe, and the like as shown in FIG. 3A.

Steel pipe support clips (110, 110) performs a function of supporting the support steel pipe 100 detachably to the H-shaped steel (1). Steel pipe support clips (110, 110) may be configured in the same structure as each other as shown in FIG.

That is, the inner band support plate 112 is joined to the end of the bracing steel tube 100 and abuts the inner surface of the flange 1b of the H-shaped steel 1, and the outer band support plate 112 faces the outer surface of the flange 1b. The outer side stripe support plate 114 which contact | connects, and the flange straddle 113 which connects the upper end of the inner side stripe support plate 112 and the outer side stripe support plate 114 are comprised.

Therefore, the inner stripe support plate 112 and the outer stripe support plate 114 has a fitting gap (T) that is formed by the flange stepped jaw 113, the fitting interval is equal to the thickness (t) of the flange (1b) It is composed.

On the other hand, the steel pipe support clips (110, 110) may be formed with one or more adhesion protrusions (114a) protruding to the outer strip support plate 114 to be in close contact with the H-shaped steel (1). At this time, the close protrusion 114a protrudes toward the inner stripe support plate 112. The contact protrusion 114a may be configured to be bent as shown in FIG. 1 to protrude linearly or may be configured in the form of a circular button 114a as shown in FIG. 5. The close contact protrusion 114a applied to the present invention is not limited to the illustrated form, but may be sufficient as long as the flange 1b of the H-shaped steel 1 can be in line or point contact or local surface contact.

On the other hand, in order to cope with the change in the width of the web (1a) of the H-beams (1) in the production or use frequency of the H-beams (1), the steel pipe support clips (110,110) as shown in Figure 6a and 6b A gap gripper 120 inserted downward from the 113 may be further provided. The gap gripper 120 is a plate-shaped bent in a L-shape to be inserted through the long hole 113a formed in the belt-shaped cladding 113. Therefore, when the gap gripper 120 is inserted into the long hole 113a, an end position of the bracing steel pipe 100 may be increased.

In addition, the present invention may further include an elastic bending portion (112a) in the inner band support plate 112 as shown in Figure 7 in order for the steel pipe support clip (110,110) rebound with elastic resilience when the bracing steel pipe 100 receives a compressive force. The elastic bending portion 112a is resistant to the compressive force while inducing the compression behavior by extending the inner band support plate 112 in the vertical direction when the bracing steel pipe 100 receives the compressive force.

In addition, the inner stripe support plate 112 may further be provided with a compression plate 124, the convex surface 124a is located as the outer stripe support plate 114, as shown in Figs. At this time, the compression plate 124 may be manufactured in a plate of a circular or square shape.

In addition, as shown in FIG. 9, one of the steel pipe support clips 110 and 100 may be configured by removing the outer strip support plate 114. Even if the outer side strip support plate 114 is removed, the installation of the steel pipe support clips 110 and 100 on the H-shaped steel 1 by the flange latching jaw 113 becomes possible.

In addition, as shown in Figure 10, one of the steel pipe support clips (110, 100) is removed from the outer band support plate 114 and the flange stepped jaw 113, and at the same time the inner band support plate 112 is a web of H-shaped steel (1) It may be configured as a structure supported by 1a).

Here, the bracing steel pipe 100 is all filled with a filler 102 therein to increase the compressive strength as shown in Figure 3b. The filler may for example be concrete mortar. Therefore, the filler 102 is distributed with the compressive force received by the bracing steel pipe 100 together with the bracing steel pipe 100 to increase the overall compressive strength of the stiffener 10 can effectively prevent the buckling of the H-shaped steel (1).

In addition, the inner brace steel pipe 100a having a relatively small cross-sectional area may be further installed inside the brace steel pipe 100 as shown in FIG. 3C. At this time, the inner brace steel pipe (100a) may have a cross-sectional structure as shown in FIG.

Therefore, the cross-sectional area of the inner bracing steel pipe 100a is added to the cross section of the bracing steel pipe 100 to increase the resistance moment, thereby preventing the buckling of the bracing steel pipe 100 itself.

In addition, the filler 102 such as concrete mortar may be further filled between the bracing steel pipe 100 and the inner bracing steel pipe 100a as shown in FIG. 3D. Therefore, the bracing steel tube 100, the inner bracing steel pipe 100a, and the filler material 102 simultaneously resist the compressive force acting on the stiffener 10 so that the resistance moment is further increased so that not only the bracing steel pipe 100 but also the H-shaped steel 1 can be obtained. Prevent buckling.

The stiffener 10 configured as described above is provided with steel pipe support clips 110 and 110 at both ends thereof, so that the stiffener 10 can be easily detachable from the H-shaped steel 1. At this time, when the stiffener 10 is installed, it is used by being slightly forcibly fitted into the shaped steel 1 as shown in FIGS. 2 and 4. Accordingly, the inner band support plates 112 and 112 are located inside the flange 1b of the H-beams 1 and the outer band support plates 114 are located outside the flange 1b of the H-beams 1, It hangs on the upper end of the flange 1b of the H-beam 1. In addition, when the close protrusions 114a and 114a are formed on the steel pipe support clips 110 and 110, an effect of being easily fixed at the mounting position can be obtained. Therefore, the work to be fixed by welding as in the prior art is unnecessary. In addition, the position of the stiffener 10 can be easily changed according to the change of the position of the earth anchor or the brace installation section accordingly, and can immediately respond to the buckling prevention of the H-beam 1.

In addition, the gap gripper 120 can be used to easily install the stiffener 10 in response to a change in the width of the web 1a of the H-shaped steel 1.

In addition, by adding a compression plate 124 to the steel pipe support clips (110, 110) it can resist the axial pressure acting on the bracing steel pipe 100 with a compressive elastic resistance.

In addition, when the stiffener 10 is installed in the H-beam 1, the brace steel pipe 100 is located between the flanges 1b and 1b of the H-beam 1 and receives axial pressure, thereby preventing buckling of the flange 1b. can do. In addition, when the concrete mortar is filled in the bracing steel pipe 100, the compressive strength is further increased to resist a large compressive force.

In addition, when the inner bracing steel pipe 100a is installed inside the bracing steel pipe 100, the bending moment is further increased to effectively buckle the buckling of the H-shaped steel 1 side flanges 1b and 1b as well as the buckling of the bracing steel pipe 100. You can prevent it.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention . The invention is not limited by these variations and modifications, but is only limited by the scope of the appended claims.

10: Stiffener
100: brace steel pipe
100: inner brace steel pipe
110,110: steel pipe support clip
112: inner band support plate
113: flange threshold
114: outer band support plate
114a: contact protrusion
120: gap gripper
124: compression plate

Claims (14)

In the stiffener (10) for preventing the flange buckling of the H-shaped steel (1) used for supporting the belt or brace,
One or more bracing steel tubes (100) positioned between two flanges of the H-shaped steel (1) facing each other and resisting compressive forces;
It consists of a steel pipe support clip (110) provided at both ends or one end of the bracing steel pipe (100) to support the bracing steel pipe (100) to the H-beam (1);
The steel pipe support clip 110,
An inner band support plate 112 joined to the bracing steel pipe 100 and in contact with the flange inner surface of the H-shaped steel;
An outer belt support plate 114 facing the flange outer surface of the H-shaped steel opposite to the inner belt support plate 112;
The inner strap support plate 112 and the outer strap support plate 114 is composed of a flange latching jaw (113) connecting the upper end;
The steel pipe support clip (110,110) is a stiffener for preventing the flange buckling of the H-shaped steel, characterized in that the gap gripper 120 is inserted further downward through the long hole (113a) of the flange latching jaw (113). The method of claim 1,
The brace steel pipe 100 is a stiffener for preventing flange buckling of the H-shaped steel, characterized in that made of any one of a circular pipe, elliptic pipe, square pipe. The method of claim 1,
The brace steel pipe 100 is a stiffener for preventing the buckling of the flange of the H-shaped steel, characterized in that the concrete is filled with mortar. delete The method of claim 1,
The outer stripe support plate 114 is a stiffener for preventing flange buckling of the H-shaped steel, characterized in that the one or more adhesion protrusions (114a) protruding toward the inner stripe support plate (112) is further formed. delete The method of claim 1,
The inner stripe support plate 112 is a stiffener for preventing flange buckling, characterized in that the elastic bending portion (112a) is further included to cause spring behavior. The method of claim 1,
The inner stripe support plate 112 is a stiffener for preventing the flange buckling of the H-shaped steel, characterized in that the compression plate 124 is further provided with a convex spherical surface is located as the outer stripe support plate (114). The method of claim 1,
Stiffener for preventing flange buckling of the H-shaped steel, characterized in that the outer band support plate 114 is removed from any one of the steel pipe support clips (110, 110) of both ends. The method of claim 1,
Stiffener for preventing flange buckling of the H-shaped steel, characterized in that the outer band support plate 114 and the flange latching jaw 113 is removed from the steel pipe support clip 110 of either of the steel pipe support clips (110, 110) of both ends . The method of claim 1,
The outer band support plate 114 and the flange latching jaw 113 are removed from the steel pipe support clip 110 of either of the steel pipe support clips 110 and 110 at both ends, and at the same time, the inner band support plate 112 is H-shaped steel (1). A stiffener for preventing flange buckling of an H-shaped steel, which is supported by a web. The method according to any one of claims 1 to 3, 5, 7 to 11,
The stiffener for preventing the flange buckling of the H-shaped steel, characterized in that the inner brace steel pipe (100a) having a relatively small cross-sectional area is further installed inside the brace steel pipe (100). 13. The method of claim 12,
The inner brace steel pipe (100a) is a stiffener for preventing flange buckling of the H-shaped steel, characterized in that made of any one of a circular pipe, elliptic pipe, square pipe. 13. The method of claim 12,
Stiffener for preventing flange buckling of the H-shaped steel, characterized in that the concrete mortar is filled between the brace steel pipe 100 and the inner brace steel pipe (100a).

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