KR20220084650A - Reinforcing structure of beam and reinforcing method of beam - Google Patents

Abstract

The present invention is a beam member having an opening; and a reinforcing ring in which the wire rod is bent into a ring shape, at least one cut-off section is formed, and welded while being fitted in the opening.

Description

Reinforcing structure of beam member and method of reinforcing beam member

The present invention relates to a reinforcing structure of a beam member with improved economic feasibility and a method for reinforcing a beam member.

It should be noted that the content described in this section merely provides background information on the present invention and does not constitute the prior art.

In buildings, it is often necessary to drill an opening in the web of Cheolgolbo and pass through the facility pipe due to restrictions such as floor height.

Since the bearing capacity of the cheolgolbeo is reduced due to the opening, a separate reinforcing material must be installed to compensate for this.

Referring to Figure 1, in a method of reinforcing the opening 15 of the cheolgolbo 10 including the upper flange 11, the web 12, the lower flange 13, the opening with a reinforcing plate 20 of a rectangular shape ( 15) A method of reinforcing the periphery is disclosed.

However, in this case, there is a problem that the periphery of the opening 15 is excessively reinforced to an unnecessary portion, thereby reducing economic efficiency.

KR 10-1997-0035195 A

An aspect of the present invention is to provide a reinforcement structure for a beam member and a method for reinforcing a beam member in which economic efficiency is improved and constructability in the field can be improved.

As an aspect for achieving the above object, the present invention is a beam member having an opening; and a reinforcing ring in which the wire rod is bent into a ring shape, at least one cut-off section is formed, and welded while being fitted in the opening.

Preferably, the beam member has a web hole that is the opening in the web, and can be welded over a curved surface on the outer circumferential surface of the reinforcing ring and a cross section in the thickness direction of the web.

Preferably, the opening is composed of a circular web hole formed in the web, and the reinforcing ring is composed of a wire having a circular cross-section, and the wire rod may be a circular ring in which the wire rod is bent into a circular shape.

Preferably, the diameter of the circular ring may be 5 ~ 15 mm larger than the diameter of the web hole.

Preferably, the circular ring may be composed of a cutting ring member in which one cutting section is formed between both ends of the wire rod.

Preferably, the cutting ring member may be disposed in the 3 o'clock direction or the 9 o'clock direction in the state in which the cutting ring member is bonded to the web.

Preferably, the circular ring, a semi-circular ring-shaped upper reinforcing ring for reinforcing the upper region of the web hole; and a lower reinforcing ring in a semicircular ring shape disposed in a lower region of the upper reinforcing ring and reinforcing the lower region of the web hole, wherein two cut-off sections are formed between the upper reinforcing ring and the lower reinforcing ring can be

Preferably, the two cut-off sections may be arranged in the 3 o'clock direction and the 9 o'clock direction.

Preferably, the reinforcing ring may be joined to the opening in a state in which the cut section is not welded.

Preferably, the reinforcing ring may be joined to the opening in a state in which the cut section is tack welded.

Preferably, the reinforcing ring is fitted in the direction of the second surface from the first surface of the web in which the opening is formed, and may be arranged to protrude from the first surface and the second surface, respectively.

As another aspect for achieving the above object, the present invention is a method of reinforcing a beam member using the reinforcing structure of the beam member, a reinforcing ring arrangement step of arranging the reinforcing ring to be fitted into the opening; a tack welding step of tack-welding the web and the reinforcing ring in the direction of the first surface where the reinforcing ring is fitted into the opening; and a main welding step of main welding the web and the reinforcing ring in a second surface direction opposite to the first surface; provides a method for reinforcing a beam member comprising.

Preferably, the main welding step may form a weld over the curved surface of the reinforcing ring and the cross-section in the thickness direction of the web.

According to an embodiment of the present invention, the reinforcing structure of the beam member and the method of reinforcing the beam member have the effect of improving the economic feasibility and at the same time improving the workability in the field.

1 is a view showing a reinforcing structure of a conventional beam member.
2 is a view showing a reinforcement structure of a beam member according to an embodiment of the present invention.
3 is a view showing a reinforcement structure of a beam member according to another embodiment of the present invention.
4 is a view showing a reinforcement structure of a beam member according to another embodiment of the present invention.
FIG. 5 is a view showing a cross-sectional view taken in the direction I-I' of FIG. 4 .
FIG. 6 is a view showing a cross-sectional view taken in a direction II-II' of FIG. 4 .
7 is a view showing the bending moment distributed in the reinforcement ring when it is assumed that the reinforcement ring resists the shear force acting on the beam member by bending.
8 is a view showing the results of examining the effect of whether or not a cut section of the reinforcing ring applied to the reinforcing structure of the beam member is formed on the structural performance through nonlinear finite element analysis.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiment of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. In addition, the embodiments of the present invention are provided in order to more completely explain the present invention to those of ordinary skill in the art. The shapes and sizes of elements in the drawings may be exaggerated for clearer description.

Unlike the reinforcement structure of the beam member of the present invention, it may be considered to reinforce the periphery of the opening with a ring member manufactured by casting or forging to reinforce the opening of the beam member.

However, in the case of this method, there is a problem that the manufacturing cost may increase because specialized equipment and materials are required to manufacture the ring member by the casting or forging method.

However, when the ring member is manufactured by casting or forging, the shape and size of the ring member are limited, and in order to reinforce the openings having various shapes and dimensions, a separate mold for each size of the ring member is required. There is a problem that this can greatly increase.

Hereinafter, the reinforcement structure of the beam member according to an embodiment of the present invention will be described in detail with reference to FIGS. 2 to 8 .

The reinforcement structure of the beam member according to an embodiment of the present invention may include the beam member 100 and the reinforcement ring 200 .

Hereinafter, components included in the reinforcement structure of the beam member according to an embodiment of the present invention will be described with reference to FIGS. 2 to 4 .

2 to 4 are views showing the reinforcement structure of the beam member according to various embodiments of the present invention.

The beam member 100 may have an opening 150 formed therein.

The beam member 100 may include an upper flange 110 , a lower flange 130 , and a web 120 , and an opening 150 may be formed in the web 120 .

An upper flange 110, a lower flange 130 installed to face the upper flange 110 in the height direction, and a web 120 connecting between the upper flange 110 and the lower flange 130 may be provided. .

Of course, the beam member 100 to which the reinforcement structure of the beam member of the present invention is applied has been representatively described as including the upper flange 110, the lower flange 130, and the web 120, but various types of webs are formed. Of course, it can be applied to the support member.

As an example, two or more webs between the upper flange and the lower flange 130 may be applied to a beam member that is disposed to be spaced apart in the width direction, of course.

As another example, the two webs are arranged to be spaced apart in the width direction of the beam member, and of course it can be applied to a beam member having a 'U-shaped' cross section including a bottom plate connecting the lower part of the two webs.

The reinforcement ring 200 serves to reinforce the opening 150 of the beam member 100 .

In the reinforcing ring 200 , the wire rod is bent in a ring shape, and at least one cut-off section 250 may be formed, and the wire rod may be welded while being inserted into the opening 150 .

The reinforcing ring 200 may be bent in a ring shape by utilizing various wire rod bending devices used in the prior art, and the reinforcing ring 200 is bent so as to have a diameter corresponding to the size of the opening 150 . can be processed. Of course, the size of the reinforcing ring 200 may be slightly larger than the size of the opening 150 .

In the present invention, by reinforcing the opening 150 using the reinforcing ring 200 obtained by bending the wire rod, the reinforcing ring 200 applicable to the opening 150 having various shapes and dimensions can be manufactured with a single facility. There is an effect that the economic efficiency can be improved in that the manufacturing cost of the reinforcing ring 200 can be reduced while being lost.

5 and 6 , the beam member 100 has a web hole 150 , which is an opening 150 , is formed in the web 120 , and a curved surface on the outer circumferential surface of the reinforcing ring 200 and the thickness of the web 120 . It can be welded across the directional cross-section.

The reinforcing ring 200 and the web 120 may be welded together while being welded over the curved surface on the outer circumferential surface of the reinforcing ring 200 and the cross section in the thickness direction of the web 120 to form a main weld.

The reinforcing ring 200 is fitted into the opening 150 in the direction from the first surface 121 to the second surface 122 of the web 120, and the reinforcing ring 200 is inserted into the opening 150 in the first state. The reinforcing ring 200 and the web 120 may be tack welded and temporarily fixed in the plane 121 direction.

Thereafter, the reinforcing ring 200 and the web 120 in the direction of the second surface 122 opposite to the first surface 121 may be main welded. At this time, the main welding may be welded over the curved surface on the outer peripheral surface of the reinforcing ring 200 and the cross-section in the thickness direction of the web 120 .

In the present invention, in the reinforcement structure of the beam member, a cross-sectional space similar to a 'V-shape' is formed between the curved surface on the outer circumferential surface of the reinforcement ring 200 and the cross-section in the thickness direction of the web 120. In the conventional welding operation, two Since the improvement work of forming a 'V-shaped' notch between the base materials can be omitted, there is an effect that the workability in the field can be improved.

2 to 4, the opening 150 is composed of a circular web hole 150 formed in the web 120, the reinforcing ring 200 is composed of a wire having a circular cross-section, the wire is circular It may be a circular ring that is bent in the shape of.

At this time, at least one cut-off section 250 may be formed in the circular ring.

The diameter of the wire constituting the circular ring may be affected by the thickness of the web 120 , the diameter of the circular web hole 150 , and the height of the web 120 .

For example, when the diameter of the circular web hole 150 is 1/3 or more to 1/2 or less of the height of the web 120, the diameter of the wire constituting the circular ring is 2 to the thickness of the web 120 It can be configured three times.

As another example, when the diameter of the circular web hole 150 is more than 1/2 ~ 2/3 or less of the height of the web 120, the diameter of the wire constituting the circular ring is 3 of the thickness of the web 120 It can consist of ~ 4 times.

The diameter of the circular ring may be larger than the diameter of the web hole 150 by 5 ~ 15 mm.

This is, when the diameter of the reinforcing ring 200 is formed to be larger than the diameter of the opening 150 by more than 15 mm, the diameter of the reinforcing ring 200 becomes too large and the curved surface of the reinforcing ring 200 and the web 120 This is because it becomes difficult to form a weld over the cross section in the thickness direction.

2 and 4, the circular ring may be composed of a cutting ring member 230 in which one cutting section 250 is formed between both ends of the wire rod.

The cutting ring member 230 may be disposed in the 3 o'clock direction or the 9 o'clock direction in the state in which the cutting ring member 230 is bonded to the web 120 .

Referring to FIG. 3 , the circular ring may include an upper reinforcing ring 210 and a lower reinforcing ring 220 .

The upper reinforcing ring 210 may be composed of a semicircular ring-shaped member for reinforcing the upper region of the web hole 150 .

The upper reinforcing ring 210 may be configured in a semicircular ring shape convex upward in a state installed in the web hole 150 .

The lower reinforcing ring 220 is disposed in the lower region of the upper reinforcing ring 210 and may be composed of a semicircular ring-shaped member for reinforcing the lower region of the web hole 150 .

The lower reinforcing ring 220 may be configured in a semicircular ring shape convex downward in a state installed in the web hole 150 .

In a state in which the upper reinforcing ring 210 and the lower reinforcing ring 220 are respectively installed in the web hole 150, two cut-off sections 250 are formed between the upper reinforcing ring 210 and the lower reinforcing ring 220. can be

The two cut-off sections 250 may be disposed in the 3 o'clock direction and the 9 o'clock direction.

7 is a view showing the bending moment (Mr) distributed in the reinforcement ring 200 when it is assumed that the reinforcement ring 200 resists the shear force acting on the beam member 100 by bending.

7 (a) is reinforced by a combination of a tensile distributed load (wt) and a compressive distributed load (wc) equivalent to the shear force (Qr) shared by the reinforcing ring 200 among the shear forces acting on the beam member 100 It is a view showing the distribution of the total bending moment (Mr) generated in the ring (200).

The left side of Fig. 7 (b) is a view showing the distribution of tensile bending moment (Mrt) generated in the reinforcing ring 200 by the tensile distribution load (wt), and the right side of Fig. 7 (b) is the compression distribution It is a view showing the distribution of the compression bending moment (Mrc) generated in the reinforcing ring 200 by the load (wc).

Referring to the right side of Fig. 7 (a), the bending moment (Mr) generated by the combination of the tensile distributed load (wt) and the compressive distributed load (wc) is the 12 o'clock direction and the 3 o'clock direction of the reinforcing ring 200 , it can be seen that the bending moment (Mr) does not act in the 6 o'clock and 9 o'clock directions.

Therefore, in the 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock directions of the reinforcing ring 200 , resistance to the shear force of the beam member 100 is not required.

However, in the 12 o'clock and 6 o'clock directions of the reinforcing ring 200, compressive and tensile forces are required for bending acting on the beam, and continuity of the reinforcing ring 200 is required in the 12 o'clock and 6 o'clock directions is judged

Therefore, in the 12 o'clock and 6 o'clock directions of the reinforcing ring 200, resistance to bending acting on the beam is required, and the reinforcing ring 200 is cut off in the 12 o'clock and 6 o'clock directions of the reinforcing ring 200 Not disposing the section 250 may be desirable from the standpoint of structural stability.

However, in the 12 o'clock and 6 o'clock directions, the bending moment (Mr) according to the shear force does not act. stress), and the 6 o'clock direction is the area where tensile stress (compressive stress during negative moment action) acts during positive moment action.

It may be preferable from the viewpoint of structural stability that the cut-off section 250 formed in the reinforcing ring 200 of the present invention is not disposed in the region where the compressive stress and the tensile load are applied.

8 is a view showing the results of examining the effect of the formation of the cut section 250 of the reinforcing ring 200 applied to the reinforcing structure of the beam member on the structural performance through nonlinear finite element analysis.

8 , the vertical axis represents shear force (unit: kN), and the horizontal axis represents rotation angle (unit: rad).

The shear force included in FIG. 8 means a shear force acting on the reinforcement structure of the beam member including the reinforcement ring 200 and the beam member 100 . On the other hand, the shear force (Qr) shown in FIG. 7 means a shear force acting on the reinforcing ring 200 .

Referring to Figure 8, Comparative Example 1 (600s-1n) is an explanation result of the intact beam member 100 without an opening 150, Comparative Example 2 (600s-2h) has an opening 150, but a reinforcing ring ( 200) is the analysis result of the beam member 100 without.

Comparative Example 3 (600s-3full) is an analysis result of the beam member 100 to which the reinforcing ring 200 without the cut-off section 250 is applied, and Comparative Example 4 (600s-4half) has two cut-off sections 250 . An analysis result of the beam member 100 to which the reinforcing rings 200 respectively formed in the 3 o'clock and 9 o'clock directions are applied.

Referring to FIG. 8 , Comparative Example 3, which is a beam member 100 to which a reinforcing ring 200 without a cutoff section 250 is applied, and a reinforcing ring in which two cutoff sections 250 are formed in the 3 o’clock and 9 o’clock directions, respectively It can be seen that in Comparative Example 4, which is the beam member 100 to which 200 is applied, the analysis results almost overlap.

That is, in Comparative Example 3 and Comparative Example 4, the beam rotation angle with respect to the action of the shear force is almost the same. The effect of forming the cut section 250 in the 3 o'clock and 9 o'clock directions on the structural performance of the reinforcement structure of the beam member It was found that there was little effect.

Therefore, the reinforcement structure of the beam member of the present invention forms the cut section 250 in the reinforcement ring 200 by arranging the cut section 250 of the reinforcing ring 200 in the 3 o’clock direction and/or the 9 o’clock direction. It can be seen that structural performance can be stably secured while improving economic feasibility.

The reinforcing ring 200 may be joined to the opening 150 in a state in which the cut section 250 is not welded.

The reinforcing ring 200 is a cut section 250 between both ends of the bent wire rod is joined to the opening 150 in a non-welded state, so that the reinforcing ring 200 omits welding in the cut section 250 . Thus, economic efficiency can be improved.

The reinforcing ring 200 may be joined to the opening 150 in a state where the cut section 250 is tack welded.

The reinforcing ring 200 may be joined to the opening 150 in a state where a cut section 250 between both ends of the bent wire rod is tack welded.

6, the reinforcing ring 200 is fitted in the direction of the second surface 122 from the first surface 121 of the web 120 in which the opening 150 is formed, the first surface 121 and The second surface 122 may be disposed to protrude from each other.

It is welded in a state fitted in the opening 150 of the reinforcing ring 200, and disposed to protrude from the first surface 121 and the second surface 122 in the thickness direction of the web 120 of the reinforcing ring 200, respectively. can be

This is to improve the structural stability of the reinforcing structure of the beam member of the present invention in a state in which the reinforcing ring 200 is installed by disposing the reinforcing ring 200 as close as possible to the center of the thickness direction of the web 120 .

Next, the reinforcement method will be described in detail with reference to the drawings.

2 to 6 , the reinforcement method according to an embodiment of the present invention may include a reinforcing ring 200 arrangement step, a tack welding step, and a main welding step.

A beam member 100 having an opening 150 formed in the web 120 is prepared, a wire rod is bent into a ring shape, and a reinforcing ring 200 in which at least one cutout section 250 is formed is prepared.

The reinforcing ring 200 arrangement step is a step of disposing the reinforcing ring 200 to be fitted into the opening 150 .

In the step of placing the reinforcing ring 200 , the reinforcing ring 200 may be fitted into the opening 150 formed in the web 120 while aligning the centers of the reinforcing ring 200 and the opening 150 .

In the step of disposing the reinforcing ring 200 , the beam member 100 having the opening 150 formed thereon is placed below, and the reinforcing ring 200 may be disposed by inserting the reinforcing ring 200 from the upper side of the opening 150 .

The tack welding step is a step of tack welding the web 120 and the reinforcing ring 200 in the direction of the first surface 121 where the reinforcing ring 200 is fitted into the opening 150 .

Tack welding refers to welding of relatively short lengths to temporarily hold the object to be welded in the position determined before the main welding.

In the tack welding step, tack welding may be performed at a plurality of points along the circumferential direction of the reinforcing ring 200 in a state in which the reinforcing ring 200 is fitted in the opening 150 .

As an example, in the tack welding step, tack welding may be performed at two points at intervals of 180 degrees along the circumferential direction of the reinforcing ring 200 .

As another example, in the tack welding step, the tack welding may be performed at four points at intervals of 90 degrees along the circumferential direction of the reinforcing ring 200 .

In the tack welding step, the reinforcing ring 200 and the web 120 may be tack welded in the direction of the first surface 121 where the reinforcing ring 200 is fitted. As an example, the first surface 121 of the web 120 and the reinforcing ring 200 may be tack-welded.

The main welding step is a step of main welding the web 120 and the reinforcing ring 200 in the direction of the second surface 122 opposite to the first surface 121 .

Main welding is welding in earnest to weld a welded object with a fixed position by tack welding.

The main welding step may be carried out in a state in which the beam member 100 is turned over after the tack welding step is completed, and the reinforcing ring 200 and the web ( 120) may be a flare-bevel weld.

The flare-bevel weld method is one of the main welding methods for welding reinforcing bars and steel plates, and it goes without saying that various types of main welding methods other than this method can be applied.

The main welding step may be welded over the curved surface of the reinforcing ring 200 and the cross-section in the thickness direction of the web 120 .

In addition, it goes without saying that various embodiments of the reinforcement structure of the beam member having the various embodiments described above may be applied to the reinforcement method of the present invention.

Therefore, the configuration of the beam member 100 and the reinforcing ring 200 of the reinforcement structure of the beam member utilized in the reinforcement method is the same as the configuration of the reinforcement structure of the beam member as already described. omit

Reinforcement method of the present invention, which is exemplified as a preferred reinforcement method in order to enable a person with ordinary skill in the art to easily practice the present invention, in addition to the above-mentioned order Modifications or other ancillary processes may be added.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and variations are possible within the scope without departing from the technical spirit of the present invention described in the claims. It will be apparent to those of ordinary skill in the art.

10: beam member 11: upper flange
12: web 13: lower flange
15: opening, web hole 20: reinforcing plate
100: beam member 110: upper flange
120: web 121: first side
122: second surface 130: lower flange
150: opening, web hole 200: reinforcing ring
210: upper reinforcing ring 220: lower reinforcing ring
230: cut ring member 250: cut section
Qr: Shear force shared by the reinforcing ring wt: Tensile distribution load
wc: compressive distribution load Mr: bending moment
Mrt: Tensile bending moment Mrc: Compressive bending moment

Claims (13)

A beam member having an opening; and
Reinforcement structure of a beam member comprising a; the wire rod is bent in a ring shape, at least one cut section is formed, and a reinforcing ring is welded in a state of being inserted into the opening.
According to claim 1,
The beam member is formed with a web hole that is the opening in the web,
A reinforcing structure of a beam member that is welded over the curved surface on the outer circumferential surface of the reinforcing ring and the cross section in the thickness direction of the web.
3. The method of claim 2,
The opening is composed of a circular web hole formed in the web,
The reinforcing ring is a reinforcing structure of a beam member that is a circular ring composed of a wire having a circular cross section, and the wire is bent in a circular shape.
4. The method of claim 3,
Reinforcement structure of the beam member, characterized in that the diameter of the circular ring is 5 ~ 15 mm larger than the diameter of the web hole.
According to claim 3, The circular ring,
A reinforcing structure of a beam member consisting of a cutting ring member in which one cut section is formed between both ends of the wire rod.
6. The method of claim 5,
The cutting ring member is a reinforcing structure of a beam member in which the cutting section is disposed in the 3 o'clock direction or the 9 o'clock direction in a state where it is joined to the web.
According to claim 3, The circular ring,
an upper reinforcing ring of a semicircular ring shape for reinforcing an upper region of the web hole; and
It is disposed in the lower region of the upper reinforcing ring, the lower reinforcing ring of a semicircular ring shape for reinforcing the lower region of the web hole;
A reinforcing structure of a beam member in which two cut-off sections are formed between the upper reinforcing ring and the lower reinforcing ring.
8. The method of claim 7,
The two cut sections are arranged in the 3 o'clock direction and the 9 o'clock direction. Reinforcement structure of the beam member.
According to claim 1,
The reinforcing ring is a reinforcing structure of a beam member in which the cut section is joined to the opening in a non-welded state.
According to claim 1,
The reinforcing ring is a reinforcing structure of a beam member in which the cut section is joined to the opening in a tack welding state.
According to claim 1, wherein the reinforcing ring,
The reinforcing structure of the beam member is fitted in the direction of the second surface from the first surface of the web in which the opening is formed, and is arranged to protrude from the first surface and the second surface, respectively.
It is a method of reinforcing a beam member using the reinforcing structure of the beam member according to any one of claims 1 to 11,
a reinforcing ring arrangement step of disposing the reinforcing ring to be fitted into the opening;
a tack welding step of tack-welding the web and the reinforcing ring in the direction of the first surface where the reinforcing ring is fitted into the opening; and
A method of reinforcing a beam member comprising a; a main welding step of main welding the web and the reinforcing ring in the direction of the second surface opposite to the first surface.
According to claim 12, wherein the main welding step,
A method of reinforcing a beam member for forming a weld over the curved surface of the reinforcing ring and the cross section in the thickness direction of the web.

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