KR20180116006A - Brace Reinforcing member to improve seismic performance of steel building And Reinforcing method of non-welded/non-buckling using thereof - Google Patents

Abstract

The present invention relates to a brace reinforcement member to improve seismic performance of a steel building, which easily couples a reinforcement strip plate and a spacing plate through only bolting work without welding work for a brace with a double angle-shaped core installed in a steel structure to increase compressive resistance performance, forms a buckling reinforcement casing for surrounding the core to reinforce a weak axis of the core, and expands a cross section of the core to increase buckling resistance performance, and a non-welding/non-buckling brace reinforcement method using the same. According to one preferred embodiment of the present invention, the brace reinforcement member to improve seismic performance of a steel building comprises: a reinforcement strip plate formed in a plate shape with a predetermined thickness having a coupling hole penetrating a central part to be inserted into a space between vertical plates at a position where a coupling hole of the core is formed so as to be integrally coupled with both side cores by a bolt; the spacing plate formed parallel to a horizontal plate at an end part of the vertical plate having a horizontal plate of the core to form the reinforcement strip plate therein; and a pair of buckling reinforcement casings including a main body with a flat U-shaped sectional shape and a predetermined length, a coupling part extended by outwardly and vertically bending both end parts of the main body, and a reinforcement part to which an outer end part of the coupling part is outwardly and vertically extended, so as to surround the longitudinal central part of the core, such that the coupling parts come in surface contact with each other in both directions of the core to be coupled with a bolt.

Description

Technical Field [0001] The present invention relates to a brace reinforcing member for improving seismic performance of a steel frame, and a brace-free / non-buckling reinforcing member for brace using the same.

The present invention relates to a brace reinforcing member for improving the seismic performance of a steel frame, and a method of welding / unbrazing reinforcement of a brace using the brace reinforcing member. More particularly, the present invention relates to a brace reinforcing member for welding a brace having a double- It is possible to improve the compression resistance performance by combining the reinforcing strip plate and the spacing plate easily by only the bolting operation without the need of work and to construct the buckling reinforcing casing to surround the core material to reinforce the weak axis of the core material and enlarge the cross- And more particularly, to a brace reinforcing member for enhancing seismic performance of a steel frame building, and a braze-free / non-buckling reinforcing method using the same.

In general, steel structures have been widely used in infrastructure facilities and plants, and existing structures have been designed to meet the requirements of national design (earthquake) standards at the time. However, The seismic design criteria is judged to be the installation of reinforcement structures through the reinforcement design of existing facilities. Most of the braces are designed to receive tensile force and have a large slenderness ratio. When they receive compressive force, they cause elastic buckling, failing to function as a brace. Also, in most of the periodical facilities and plants, since the steel structure must be reinforced during operation, there is a problem that the welding operation is not possible.

As a technology to be a background of the present invention, there is a patent registration No. 1364787 entitled " weak axis reinforcing non-buckling brace "(Patent Document 1).

In the above-mentioned background art, a brace for reinforcing a steel structure made up of a steel column 2 and a beam 3 includes a core 10 formed of H-shaped steel, a main body 110 having a C- And a first joint portion 120 having both ends of the core member 10 bent to the outer side of the core member 10 are coupled to each other at both sides of the flange of the core member 10 to surround the central portion in the longitudinal direction of the core member 10 The auxiliary reinforcement member 200 is further configured to be inserted between the first engaging portions 120 of the stiffener 100 to be mutually engaged so that the end portions thereof contact the longitudinal direction of the central portion of the web of the core material 10, Wherein the auxiliary reinforcement member (200) is any one of a plate member, a T-shaped member, an I-shaped member, and an H-shaped member.

However, the above-mentioned background technique reduces the possibility of buckling of the brace itself by reinforcing the core material 10, which is a brace, but it is applied only when the core material is H-shaped steel.

Patent No. 1364787 entitled "Reinforced Non-Buckling Brace"

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a brace for a brace which is formed by joining a pair of angles and can fasten the reinforcing strip and the spacer plate by bolt- It is possible to increase the compression resistance performance and to strengthen the weak axis of the core material by constructing the buckling reinforcing casing to surround the core material and to increase the cross section of the core material, A reinforcing member for strengthening the seismic performance of a steel frame building to increase the stability of the steel frame structure by inducing stable hysteretic behavior even under repeated loads such as earthquakes by preventing the buckling at the time of earthquake, The purpose of the method is to provide.

The present invention relates to a steel structure comprising a steel column and a beam and having a bracing plate formed in a diagonal direction with respect to upper and lower steel beams and formed of a vertical plate and a horizontal plate and having a bend cross section, A reinforcing member for reinforcing a brace in which a pair of vertical plates are mutually opposed to each other so as to be joined to each other so as to be coupled to each other so that the braces are formed, A reinforcing belt plate inserted into the space between the vertical plate and the vertical plate and integrally joined together with the core members on both sides by bolts; A spacing plate formed parallel to the horizontal plate at an end of a vertical plate formed with a horizontal plate of the core material on which the reinforcing strip plate is formed; A main body having a C-shaped cross-sectional shape having a predetermined length, an engaging portion in which both ends of the main body are bent and extended at right angles to the outward direction, and a reinforcing portion in which an outer end portion of the engaging portion extends in the outward direction at right angles, And a pair of buckling-reinforced casings which are formed so as to surround the joint portions and are coupled to each other by bolts, wherein the buckling-reinforced casings are surrounded by the core members so as to face each other at both sides of the core member. .

Also, it is an object of the present invention to provide a brace reinforcing member for improving seismic performance of a steel frame building, wherein the reinforcement strip and the spacing plate are integrally formed.

Another object of the present invention is to provide a brace reinforcing member for enhancing seismic performance of a steel frame building, wherein the spacing plate is formed in a single plate shape having a predetermined length, and the reinforcing strip plate is formed in a vertical direction at regular intervals of the interval plates.

Also, the buckling reinforcing casing is combined with the coupling portion so as to be positioned at both ends of the vertical plate so as to reinforce the weak axis, thereby providing a brace reinforcing member for improving seismic performance of a steel frame building.

Also, the buckling reinforcing casing is made of aluminum, and the buckling reinforcement casing is made of aluminum.

In addition, the buckling reinforcing casing is divided into two long first segment members and a short second segment member by forming a cut surface that is cut off from the center in the longitudinal direction to one side, and the cut surfaces of the two segment members, And the first segment member and the second segment member are engaged with each other at the cut surface so as to interlock with each other. The present invention provides a brace reinforcing member for improving seismic performance of a steel frame building.

In addition, in a steel structure comprising a steel column and a beam, a brace plate is formed in a diagonal direction to upper and lower steel beams. The brace plate is formed of a vertical plate and a horizontal plate and is formed to have a b- A method for reinforcing a brace formed by joining a pair of vertical plates to each other so that the vertical plates face each other in both directions of a brace plate, the method comprising the steps of: (a) penetrating a fitting hole in a vertical plate of the core at regular intervals in the longitudinal direction; (b) A reinforcing strip having a certain thickness through which a coupling hole is made to penetrate the central portion is inserted into the space between the vertical plate and the vertical plate at the position where the coupling hole of the core is formed, and is integrally joined together with the core members on both sides with bolts. Forming an interval plate in parallel with the horizontal plate at the end of the vertical plate in which the plate is formed; (c) a buckling-reinforced casing formed by a main body having a C-shaped cross-sectional shape having a predetermined length, an engaging portion in which both ends of the main body are bent at a right angle in the outward direction and a reinforcing portion in which an outer end portion of the engaging portion extends in a right- And a pair of buckling reinforcing casings so as to surround the central part in the longitudinal direction of the core material, so that the engaging parts are interposed in both directions of the core material, thereby bonding the engaging parts to each other with the bolts. Welded / unbraced reinforcement method using a brace reinforcing member for a brace.

Also, in the step (b), the reinforcement strip and the spacer plate are integrally formed. The present invention provides a braze-free welding / unbending reinforcement method using a brace reinforcing member for improving seismic performance of a steel frame.

Also, in the step (b), the spacing plates are formed in a single plate shape having a predetermined length, and the reinforcing strip plates are formed in the vertical direction at regular intervals of the spacing plates. Welded / unbraced reinforcement method using braces.

Also, in the step (c), the buckling reinforcing casing is coupled such that the engaging portions are positioned at both ends of the vertical plate to reinforce the weak axes. In the bracketing reinforcing casing, To provide a non-buckling reinforcement method.

Also, in the step (c), the buckling reinforcing casing is formed of aluminum. The brace reinforcing member is improved in seismic performance.

In addition, in the step (c), the buckling-reinforced casing is divided into two long segment members and a short second segment member, which are formed by cutting faces biased to one side in the longitudinal central portion, Wherein the cut surface of the segment member is formed in such a shape that one side of the segment member is projected on one side and the other side is recessed so that the first segment member and the second segment member are engaged with each other on the cut surface. Welded / unbraced reinforcement method using braces.

The brace reinforcing member for improving the seismic performance of a steel frame of the present invention and the braze-free / non-buckling reinforcement method using the brace include a reinforcing strip plate and an interval plate to a core of a brace installed by joining a pair of angles So that it can be easily installed even during operation of a steel structure such as a power facility, so that the compression resistance performance can be enhanced, and a buckling-reinforced casing is formed so as to surround the core, thereby reinforcing the weak axis of the core The cross section of the core material is enlarged to improve the cross sectional performance, so that the buckling does not occur even during compression, which leads to a stable hysteretic behavior even under repeated loads such as an earthquake, thereby increasing the stability of the steel structure.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
1 is a front view showing a brace in which a steel frame is installed.
Fig. 2 is a cross-sectional view taken along line AA and BB in Fig. 1. Fig.
FIG. 3 is a view showing the brazing non-welding / non-buckling reinforcement method using the brace reinforcing member for improving the seismic performance of the steel building according to the present invention.
4 is a cross-sectional view taken along line CC of FIG. 3A.
5 is a cross-sectional view taken along line DD of FIG. 3B.
6 is a cross-sectional view taken along the line EE of FIG. 3C.
7 is a perspective view showing various embodiments of the reinforcing strip and the spacer plate of the present invention.
8 is a perspective view and a plan view of another embodiment of the buckling-reinforced casing of 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.

 Hereinafter, the technical structure of the present invention will be described in detail with reference to the preferred embodiments.

FIG. 1 is a front view showing a brace provided with a steel frame structure, and FIG. 2 is a sectional view taken along the line A-A and B-B in FIG.

1 is a perspective view of a brace 1 having a double angle core material installed in a steel frame structure consisting of a steel column 5 and a beam 6 in a diagonal fashion, By combining the spacing plates, the compression resistance performance is increased and the buckling strengthening casing is formed so as to surround the core, thereby reinforcing the weak axis of the core and enlarging the cross section of the core to increase the buckling resistance performance.

The brace reinforcement member for improving the seismic performance of a steel frame of the present invention and the braze-free / non-buckling reinforcement method of the brace using the brace reinforcement member are applied to a brace (1) having a double angle core member installed in an existing steel structure Specifically, as shown in FIG. 1, a brace plate 40 is formed in the upper and lower steel beams 6 in a diagonal direction, and both end portions of the core 10 are joined to upper and lower brace plates 40 2A and 2B, the core 10 is formed to have a bend-shaped cross-section including the vertical plate 11 and the horizontal plate 12, and the brace plate 40 is formed in a diagonal direction. In this case, A pair of vertical plates 11 are disposed facing each other and are coupled with bolts 49 at the longitudinal ends thereof to form a double angle shape.

In the conventional brace 1, both ends are joined to the beam 6 by a brace plate 40 so as to reinforce the space between the column 5 and the beam 6 of the steel structure with unidirectional oblique lines, But may be coupled to the beam 6 to engage the brace plate 40 at the center of the beam 6 and to reinforce it in a bi-directional oblique line at the brace plate 40 at the center of the beam 6. [

A reinforcement member for reinforcing seismic performance of a steel structure according to the present invention comprises a reinforcement strip 30 inserted into a space between a vertical plate 11 and a vertical plate 11 of a core 10; And a pair of buckling reinforcing casings 20 joined by bolts 29 in both directions of the core material 10. The buckling reinforcing casing 20 is made of a steel plate.

The detailed description of the brace reinforcing member of the present invention will be described in detail below with reference to a braceless welding / non-buckling reinforcing method using a brace reinforcing member for improving seismic performance of a steel frame.

FIG. 3 is a view showing a brace-free welding / non-buckling reinforcement method using a brace reinforcing member for improving seismic performance of a steel building according to the present invention, and FIG. 4 is a sectional view taken along the line C-C of FIG.

In the present invention, the existing double-angle brace is reinforced without welding in the following manner.

First, the coupling hole 111 is made to pass through the vertical plate 11 of the core 10 at regular intervals in the longitudinal direction (a).

As shown in FIG. 4, the double-angle core members 10 of the installed brace 1 are coupled to each other so that the vertical plates 11 are opposed to each other in both directions of the riser plate 40. As shown in FIG. 4, The thickness of the vertical plate 11 and the vertical plate 11 form a constant spacing distance d and the pair of core members 10 do not mutually engage with each other There is a problem that the compression resistance performance is deteriorated.

Therefore, in the present invention, the coupling holes 111 are drilled in the vertical plate 11 of the core material 10 at regular intervals, so that the reinforcing plate 30 can be easily engaged in a step to be described later.

Thereafter, the reinforcing strip 30 is inserted between the vertical plate 11 and the vertical plate 11 at the position where the coupling hole 111 of the core 10 is formed, and the spacing plate 50 is positioned (b) .

FIG. 5 is a sectional view taken along the line D-D of FIG. 3b, and FIG. 7 is a perspective view showing various embodiments of the reinforcing strip and the spacer plate of the present invention.

7A, the reinforcing strip 30 is formed in a plate shape having a predetermined thickness through which the coupling hole 31 is made to pass through the central portion thereof. As shown in FIG. 3B, the joining hole 111 of the vertical plate 11 and the joining hole 3 of the reinforcing strip 30 are aligned with each other so that the core members 10 on both sides and the reinforcing strip 30 are joined by the bolts 32, So that the pair of core members 10 can be made to behave integrally, and the compression resistance of the core member 10 can be improved.

The spacing plate 50 is disposed parallel to the horizontal plate 12 at the end of the vertical plate 11 on which the horizontal plate 12 of the core 10 on which the reinforcing strip 30 is formed is formed. The spacing plate 50 may be temporarily fixed without being fixed or joined to facilitate coupling of the buckling-reinforced casing 20 to be described later.

The interval plate 50 is formed in a plate shape of a predetermined size and has a width equal to the sum of the horizontal plates 12 of the pair of core members 10, So that they are maintained at an interval of a width.

7A, the reinforcing rib 30 and the spacing plate 50 may be separately manufactured and installed separately. As shown in FIG. 7B, the reinforcing rib 30 and the spacing plate 50 may be formed separately from each other, Shaped section so as to have a ⊥-shaped cross-section so that the gap plate 50 is engaged with the end portion of the vertical plate 11 when the reinforcement strip 30 is engaged with the spacing space d by the bolts 32. [ And is formed in parallel with the flat plate 12.

7C, the spacing plate 50 may be formed of a single plate having a predetermined length, and the reinforcing strip 30 may be formed at regular intervals of the interval plate 50 in a direction perpendicular to the center in the width direction A plurality of reinforcing strips 30 can be inserted into the spacing space d at a time by connecting the plurality of reinforcing strips 30 to one spacing plate 50, 50 may increase the tensile resistance of the brace 1.

Finally, the buckling-reinforced casing 20 is coupled with the bolts 29 in both directions of the core 10 (c).

6 is a cross-sectional view taken along the line E-E of FIG. 3C.

A buckling brace (1) is used as a brace to reinforce a steel structure consisting of a steel column (5) and a beam (6).

Generally, it is difficult to directly reinforce unexposed columns or beams in order to reinforce steel structures such as power plants, plants, and plants. In contrast, the braces under tension can be compressed by the compressive force during the earthquake, and since the structures such as the plant are pin-connected, the only transverse resistance element is the brace. At this time, the steel structure such as the power plant is required to stop operation for reinforcement, it is difficult to reinforce it, and it should be reinforced during operation. Especially, steel structures such as power plants and other steel structures such as power plants, The brace and the stiffener must be constructed using bolted joints.

However, since the brace is designed to receive a tensile force and the slenderness ratio is large, elastic buckling is generated when the compression force is applied, so that the brace can not serve as a brace. Therefore, In the non-buckling reinforcement method (1), the buckling reinforcing casing (20) is formed so as to reinforce the core (10) so that the secondary radius is increased to reinforce the compressive strength.

3C and FIG. 7, the core 10 is formed of a pair of horizontally a-shaped cross-sections, and the reinforcement strip 30 is inserted between the pair of core members 10 as described above, In particular, in order to reduce the buckling effect when the compression force is applied, the buckling reinforcing casing 20 is formed outside the core 10 to reinforce the cross section.

The core member 10 and the buckling reinforcing casing 20 are not attached to each other so as not to have a surface to be directly coupled to each other so as to reinforce only the buckling of the core member 10. By virtue of mutual engagement of the two buckling reinforcing casings 20, And the buckling reinforcing casing 20 is fixedly coupled to the outside of the core 10. [

The buckling reinforcing casing 20 includes a main body 21 having a C-shaped cross section having a predetermined length, a coupling portion 22 in which both ends of the main body 21 are bent outward at right angles, And a reinforcing portion 23 whose outer end portion extends at a right angle to the outward direction is integrally formed.

The main body 21 of the buckling-reinforced casing 20 is formed in a U-shaped cross-sectional shape so as to cover the core 10 at the side of the core 10. Both ends of the buckling reinforcing casing 20 constitute an outwardly bent coupling portion 22. This is because when the buckling reinforcing casing 20 is engaged in the direction of both flanges 12 of the core 10, It is possible to increase the contact area of the reinforcing casing 20 to facilitate the coupling, to increase the rigidity of the buckling in the bent shape, to increase the secondary radius of the core 10 in the double angle shape, In order to do so. With this configuration, the compression resistance can be secured by the sectional strength of the bracing.

In particular, the buckling reinforcing casing 20 is formed by joining the engaging portions 22 at both ends of the vertical plate 11 in consideration of the directionality in the axis of the end face of the column member when the core member 10 is reinforced, .

Therefore, the buckling-reinforcing casing 20 is positioned in such a manner that the main body 21 covers both sides of the horizontal plate 12 of the core member 10, and the engaging portion 22 of the opposing buckling- 29 so that the two buckling reinforcing casings 20 facing each other are joined to each other so that the engaging portion 22 and the reinforcing portion 23 are positioned on the major axis of the core 10 to reinforce the weak axis.

The buckling reinforcing casing 20 having two buckling reinforcing casings 20 formed as described above is provided on both sides of the flange 12 of the core material 10 The engaging portions 22 and 22 of the opposing buckling reinforcing casing 20 and the engaging portions 22 and 22 of the opposing buckling reinforcing casings 20 and 20 are mutually facing each other and the engaging portions 22 and 22, .

The buckling reinforcing casing 20 may be made of various materials such as steel and composite materials such as FRP. However, since the buckling reinforcing casing 20 has many bent portions, the material itself is formed of aluminum, .

8 is a perspective view and a plan view of another embodiment of the buckling-reinforced casing of the present invention.

Since the buckling-reinforced casing 20 is formed of a molded steel plate or a bent steel plate and is formed of a single long member such as the core member 10, the buckling-reinforced casing 20 is divided in the longitudinal direction, It can be facilitated.

8A, the buckling-reinforced casing 20 is formed with a cut surface 27 to be cut by being biased to one side in the longitudinal center portion, and is composed of a first segment member 20a having a longer length and a second segment member 20a having a longer length, 8b, when the two buckling reinforcing casings 20 are coupled at both sides of the core member 10, the cut surfaces 27 of the buckling-reinforced casings 20, 20 on both sides are segmented by the segment members 20b, (27) are not located on the same line but staggered so as not to cause a discontinuity in the side buckling reinforcing casings (20) (20).

8A, the upper buckling-reinforced casing 20 includes a second segment member 20b having a shorter length from the left and a first segment member 20a having a longer length, The reinforcing casing 20 is constructed such that the first segment member 20a having a long length and the second segment member 20b having a short length are arranged in order so that the cut surface 27 of the upper buckling- So that the cut surfaces 27 of the reinforcing casing 20 do not coincide but are staggered.

In addition, since the discontinuous surface can be formed on the cut surface 27 when the first segment member 20a having a long length of the reinforcing member and the cut surface 27 of the second segment member 20b having a short length are formed in a straight line, 8B, the cut surface 27 itself is formed in such a shape that one side of the buckling reinforcing casing 20 is projected on one side of the buckling reinforcing casing 20 and one side is recessed so that the first segment member 20a and the second segment member 20a So that the segment members 20b can be configured to engage with each other.

The brace reinforcing member for enhancing the seismic performance of the steel building according to the present invention and the braze-free welding / non-buckling reinforcement method using the same are constructed by welding a reinforcing strip and an interval plate to a core of a brace installed by connecting a pair of angles It is possible to construct the buckling-reinforcing casing so as to surround the core material, and it is possible to construct the buckling-reinforcing casing so as to surround the core material, It is possible to increase the stability of the steel structure by inducing stable hysteretic behavior even under repeated loads such as earthquakes by preventing the buckling during compression by improving the cross sectional performance by enlarging the cross section of the core material. have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

1: Brace
10: core
11: Vertical plate
12: Horizontal plate
20: Stiffener
21:
22:
23:
30: Stiffening plate
31: Coupling ball
40: Brace plate
50:
5: Column
6: Bo

Claims (12)

In a steel structure composed of a steel column 5 and a beam 6,
A brace plate 40 is formed in the upper and lower steel beams 6 in a diagonal direction and is formed of a vertical plate 11 and a horizontal plate 12 so as to have a bend cross section, 40), a pair of vertical plates (11) facing each other are coupled to each other in both directions of the brace plate (40) to reinforce the brace (1) in which the core (10)
Is inserted into a space between the vertical plate 11 and the vertical plate 11 at a position where the coupling hole 111 of the core 10 is formed A reinforcing strip 30 integrally joined together with the core members 10 on both sides by bolts 32;
An interval plate 50 formed parallel to the horizontal plate 12 at the end of the vertical plate 11 on which the horizontal plate 12 of the core member 10 on which the reinforcing plate 30 is formed is formed;
(21) having a predetermined length, a coupling portion (22) in which both ends of the main body (21) are bent outward at right angles to each other, and an outer end portion of the coupling portion (22) 22 which are formed by the extending reinforcing portion 23 and surround the central portion in the longitudinal direction of the core 10 so that the engaging portions 22 face each other in both directions of the core 10, And a pair of buckling reinforcing casings (20) coupled with the bolts (29). The brace reinforcing member for enhancing the seismic performance of a steel frame building. The method according to claim 1,
Wherein the reinforcement strip (30) and the spacing plate (50) are integrally formed. The method according to claim 1,
The spacing plate 50 is formed in a single plate shape having a predetermined length,
Wherein the reinforcement strips (30) are formed in a vertical direction at regular intervals of the interval plate (50). The method according to claim 1,
Wherein the buckling reinforcing casing (20) is engaged with the coupling portion (22) so as to be positioned at both ends of the vertical plate (11) so as to reinforce the weak axis. The method according to claim 1,
The buckling reinforcing casing (20) is formed of aluminum. The buckling reinforcing casing (20) is made of aluminum. The method according to claim 1,
The buckling reinforcing casing 20 is divided into a first long segment member 20a having a long length and a second segment member 20b having a short length by forming a cut surface 27 to be cut to one side in the longitudinal center portion, ,
The cut surface 27 of the segmented two segment members 20a and 20b is formed in such a shape that one side is projected on one side and the other side is recessed so that the first segment member 20a and the second segment member 20b are mutually engaged with each other to reinforce the seismic performance of the steel frame. In a steel structure composed of a steel column 5 and a beam 6,
A brace plate 40 is formed in the upper and lower steel beams 6 in a diagonal direction and is formed of a vertical plate 11 and a horizontal plate 12 so as to have a bend cross section, A method for reinforcing a brace (1) in which a pair of straight plates (11) are opposed to each other in both directions of a brace plate (40)
(a) passing the coupling hole (111) through the vertical plate (11) of the core (10) at regular intervals in the longitudinal direction;
(b) a reinforcement strip (30) having a certain thickness through which a coupling hole (31) is formed in a space between the vertical plate (11) and the vertical plate (11) at a position where the coupling hole (111) 30 are inserted and integrally joined with the core members 10 on both sides with the bolts 32,
Constructing an interval plate (50) parallel to the horizontal plate (12) at the end of the vertical plate (11) where the horizontal plate (12) of the core (10) with the reinforcing strip (30) formed is formed;
(c) a main body 21 of a C-shaped cross-sectional shape having a predetermined length, a coupling portion 22 in which both ends of the main body 21 are bent and extended at right angles to the outward direction, A pair of buckling-reinforced casings 20 are arranged in the direction of both sides of the core 10 so as to surround the central portion in the longitudinal direction of the core 10 in such a manner that the buckling-reinforced casing 20 formed of the reinforcing portion 23 extending at right angles to the direction (22) to be engaged with the bolt (29) by inserting the bolt (29) into the bolt (29) so that the bolt (29) Non - welded / non - buckling reinforcement of braces. The method of claim 7,
In the step (b)
Wherein the reinforcement strip (30) and the spacing plate (50) are integrally formed. The method of reinforcing seismic performance of a steel structure using brace reinforcing members. The method of claim 7,
In the step (b)
The spacing plate 50 is formed in a single plate shape having a predetermined length,
Wherein the reinforcement strips (30) are formed in a vertical direction at regular intervals of the spacing plate (50). The method of claim 7,
In the step (c)
The buckling reinforcing casing (20) is engaged with the coupling portion (22) so as to be positioned at both ends of the vertical plate (11) so as to reinforce the weak axis. The brace reinforcing member Welding / non - buckling reinforcement method. The method of claim 7,
In the step (c)
Wherein the buckling reinforcing casing (20) is formed of aluminum. The method of claim 1, wherein the buckling reinforcing casing (20) is made of aluminum. The method of claim 7,
In the step (c)
The buckling reinforcing casing 20 is divided into a first long segment member 20a having a long length and a second segment member 20b having a short length by forming a cut surface 27 to be cut to one side in the longitudinal center portion, ,
The cut surface 27 of the segmented two segment members 20a and 20b is formed in such a shape that one side is projected on one side and the other side is recessed so that the first segment member 20a and the second segment member 20b are mutually engaged with each other. A method of reinforcing a non-welded / unbuckled brace using a brace reinforcing member for improving seismic performance of a steel frame building.

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