KR101461805B1 - Buckling-restrained brace having high-ductility coreplate - Google Patents

Buckling-restrained brace having high-ductility coreplate Download PDF

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Publication number
KR101461805B1
KR101461805B1 KR20130061222A KR20130061222A KR101461805B1 KR 101461805 B1 KR101461805 B1 KR 101461805B1 KR 20130061222 A KR20130061222 A KR 20130061222A KR 20130061222 A KR20130061222 A KR 20130061222A KR 101461805 B1 KR101461805 B1 KR 101461805B1
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steel
steel core
core material
deformation
plate
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KR20130061222A
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Korean (ko)
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김도환
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주식회사 포스코
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/027—Preventive constructional measures against earthquake damage in existing buildings

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)

Abstract

Provided is a buckling inhibited brace with a high-ductility core member. The buckling inhibited brace with a high-ductility core member comprises: a base material having a hollow therein; and a metal core member which is inserted into the base material and has an improved energy dissipation performance by having a deformation inducing part which induces deformation in order for plastic deformation to be generated in at least two positions by load transferred from a structure. The deformation inducing part is arranged in order for a central metal material arranged in the center of the metal core member and side metal materials arranged on both sides of the metal core material to have different strengths. The central metal material has higher strength than side metal materials to induce the plastic deformation of the metal core material to be generated on both sides of the central metal material.

Description

{BUCKLING-RESTRAINED BRACE HAVING HIGH-DUCTILITY COREPLATE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unbuckled bird having a high ductility core, and more particularly to a buckling bird having a high ductility core with improved energy dissipation capability.

The buckling restrained brace (BRB) maximizes the advantage of the steel by virtue of the fact that the core and the compressive behavior are almost the same by preventing the buckling of the core material, so that the plastic deformation capacity of the tensile and compression is equal, It has excellent energy dissipation ability. In other words, the buckling lean can be used as a resistance system against earthquake load because it can dissipate input seismic energy into hysteretic energy by yielding hysteresis while yielding against tensile force and compressive force when an earthquake occurs.

The general buckling buckle structure is formed to have a cross or straight cross section and consists of a core material directly connected to a structure such as a building, a mortar for preventing buckling, and an outer steel pipe serving as a mold for casting the mortar. In order to prevent adhesion between the mortar, non-adhesive paint is applied to the surface of the core material and then poured .

Here, the core material is a plastic material for energy dissipation, and a low-strength steel material having high ductility is used. That is, in the buckling buckets, the core member is directly connected to the structure to directly support the structure, and the outer steel pipe filled with the mortar supports the outer circumferential surface of the core while sliding against the compressive force while sliding by the lateral force.

Thus, the structure can be safely protected against lateral forces due to the bearing capacity of the unbuckled bird core and the energy dissipation capability through dissipative deformation.

Therefore, there is a need for a core having improved plastic deformation ability to improve the seismic performance while controlling the lateral displacement of the structure.

It is an object of the present invention to provide a non-buckling bird having a high ductility core with improved ductility and further improved energy dissipation capability.

Another object of the present invention is to provide a buckling bucket having a core having a high ductility to improve seismic performance of a buckling buoyed structure with improved energy dissipating ability of the core.

According to an aspect of the present invention, And a deformation inducing part inserted into the base material and inducing deformation to be generated at a position of 2 or more in accordance with a load transmitted from the structure, wherein the deformation inducing part has an improved energy dissipation capability, A center steel member disposed at a central portion of the steel core member and a side steel member disposed at both side portions of the steel core member are arranged to have different intensities and the center portion steel member is formed to have a higher strength than the both side member steel members, And a deformation is induced on both sides of the center steel member.

delete

Preferably, the steel core material is provided at both ends of the steel core material and has a connecting part connected to the structure, and an intermediate part provided between the connecting parts and having a smaller sectional area than the connecting part, 1/4 to 1/3 times the minor length.

Preferably, the deformation inducing portion includes a cut-out portion formed by cutting a cross-section at two or more positions of the steel core material, so that plastic deformation of the steel core material is induced in the plurality of cut-out portions.

Preferably, the steel core material is provided at both ends of the steel core material and has a connecting part connected to the structure and an intermediate part provided between the connecting parts and having a smaller cross sectional area than the connecting part, And a cutting groove formed in a curved shape inward from an edge of the steel core core.

Preferably, the cut-out portion may include a through hole formed through at least two positions of the steel core material.

According to another aspect of the present invention, there is provided a method of manufacturing a plasma display panel, And a deformation inducing part inserted into the base material and inducing deformation to be generated at a position of 2 or more in accordance with a load transmitted from the structure, wherein the deformation inducing part has an improved energy dissipation capability, And the first and second plates are made of a first plate material and a second plate material which are overlapped with each other by two folds so that plastic deformation of the first plate material and the second plate material is made different from each other to induce plastic deformation at a plurality of positions of the steel core material The present invention also provides a non-buckling bird provided with a high-soft core.

Preferably, the first plate and the second plate include a side steel material disposed on both side portions and a center steel material disposed between the side steel material and formed to have a higher strength than the side steel material, The positions of the central steel of the two plates may be arranged differently.

Preferably, the steel core is provided at both end portions of the steel core core and has a connecting portion connected to the structure, and an intermediate portion provided between the connecting portions and having a smaller sectional area than the connecting portion. The stepped portion having a smaller cross-sectional area can be processed as a curve.

According to the present invention, since the deformation inducing portion provided in the steel core core generates two or more positions of plastic deformation at one steel core material, the conventional plastic deformation position It is possible to obtain an effect that the ductility is improved and the energy dissipation capacity is further improved as compared with the steel core material generated in one place.

Further, according to the embodiment of the present invention, since the energy dissipating capacity of the steel core material is improved, the seismic performance of the structure having the unbuckled bridge can be improved.

FIG. 1 is a plan view showing a non-buckling bird with a high ductility core according to an embodiment of the present invention.
Fig. 2 (a) and Fig. 2 (b) are cross-sectional views of "I-I" and "II-II" of Fig.
3 is a plan view showing a new unbuckled steel core member having a high ductility core according to a first embodiment of the present invention.
4 is a plan view showing a new unbuckled steel core member having a high ductility core according to a second embodiment of the present invention.
5 is a plan view showing a new unbuckled steel core member having a high ductility core according to a third embodiment of the present invention.
6 is a plan view showing a new unbuckled steel core member having a high ductility core according to a fourth embodiment of the present invention.
Fig. 7 is a modification of Fig. 3. Fig.
FIG. 8 is a load-strain curve showing the result of forging tensile test of a general core material and first to fourth embodiments of the present invention. FIG.
9 is data summarizing the result of forging tensile test of the general core material and the first to fourth embodiments of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, the embodiments described below are embodiments suitable for understanding the technical characteristics of the unbuckled bird having the high-soft core of the present invention. However, the technical features of the present invention are not limited by the embodiments to which the present invention is applied or explained in the following embodiments, and various modifications are possible within the technical scope of the present invention.

An embodiment of the present invention relates to a buckling bucket which is installed in a structure such as a building to improve the seismic performance of the structure.

The non-buckling claw may include a base material 10 having hollows formed therein and a steel core material 200 inserted into the base material 10, as in the embodiment shown in FIGS. At this time, a rib 211 is attached to an end of the steel core member 200 to reinforce the supporting load when connected to the structure. Concrete may be filled between the core material and the base material 10.

As shown in FIGS. 1 to 3, the non-buckling buckle 100 having a high ductility core according to an embodiment of the present invention is characterized in that the steel core body 200 is strengthened in ductility, A deformation inducing part 300 for inducing a deformation to cause a plastic deformation due to a load transmitted from a structure to occur at two or more positions of the core material 200 may be included.

That is, when the load is transferred from the structure, the steel core material 200 is partially or totally plastic-deformed to dissipate the energy due to the lateral force applied to the structure. Generally, Since the cross-sectional area is increased or the ribs 211 are formed to increase the bonding force to the structure, plastic deformation of the steel core member 200 occurs in one central portion.

Meanwhile, the steel core material 200 applied to an embodiment of the present invention may induce plastic deformation at two or more portions of the steel core material 200 including the deformation inducing portion 300.

Accordingly, since the steel core material 200 applied to one embodiment of the present invention has two or more positions where one steel core material 200 is plastically deformed, the steel core core 200, The strain can be increased. Therefore, the steel core material 200 is excellent in ductility and energy dissipation capacity can be improved.

Hereinafter, various embodiments of the steel core material 200 according to the deformation inducing part 300 will be described with reference to FIGS. 3 to 6. FIG. Figure 3 shows a first embodiment of a steel core 200, Figure 4 shows a second embodiment of a steel core 200, Figure 5 shows a third embodiment of a steel core 200, , Fig. 6 shows a fourth embodiment of the steel core member 200. Fig.

3, the steel core member 200 is provided at both ends of the steel core member 200 and is connected to the structure and includes a connection portion 210 and a connection portion 210 between the connection portion 210 and the connection portion 210. [ And an intermediate portion 230 having a smaller cross-sectional area than the connection portion 210.

At this time, the ribs 211 may be joined to the connection part 210 to reinforce the rigidity of the connection part 210. [ The intermediate portion 230 may have a smaller cross-section than the connection portion 210 to concentrate the deformation due to a load transmitted from the structure. A step 220 may be formed between the connection part 210 and the intermediate part 230 to reduce the cross-sectional area. The configuration of the intermediate portion 230 and the connection portion 210 may be applied to the second to fifth embodiments of the steel core member 200 described later.

The first embodiment of the steel core member 200 according to the present invention may include a center steel member 311 disposed at a central portion and a side steel member 313 disposed at both sides of the steel core member 200 . The middle steel member 311 may be disposed at the intermediate portion 230 and the side steel member 313 may be disposed at the intermediate portion 230 and the connecting portion 210.

The central guide member 311 and the side guide member 313 may have different strengths from each other. The center guide member 311 may have a higher strength than the side steel member 313. have.

Accordingly, the deformation inducing part 300 can induce plastic deformation of the steel core material 200 to occur on both sides of the center steel material 311. For example, in the deformation inducing part 300, the steel material having the strength of the center steel material 311 of SM490 and the strength of the side steel material 313 may be used so that plastic deformation may occur at two places of the SS400 steel material . ≪ / RTI >

At this time, the length d2 of the center steel member 311 can be variously varied as long as plastic deformation can occur in both side steel members 313.

For example, the length d2 of the center steel member 311 may be 1/4 to 1/3 of the length d1 of the intermediate portion 230.

More preferably, the center steel member 311 may be disposed at the center of the intermediate portion 230. That is, plastic deformation mainly occurs in the middle portion 230 of the steel core material 200 as described above. The length d2 of the center steel material 311 is determined by plastic deformation of the steel core material 200 And may be disposed at the center in a length of 1/4 to 1/3 times of the section.

If the length d2 of the center steel member 311 is less than 1/4 of the middle member 230, the plastic deformation position can be concentrated in the middle portion of the steel core member 200, The ratio of the center steel member 311 on the middle portion 230 is increased so that the length of the plastic deformation capable portion is narrowed so that the ductility of the steel core member 200 is reduced This is because it can be reduced.

Therefore, the center steel member 311 may be formed to be 1/4 to 1/3 times as large as the middle member 230, so that plastic deformation may easily occur on both sides of the center steel member 311.

However, the length d2 of the center steel member 311 is not limited to the above example, and various modifications may be made if plastic deformation occurs on both sides of the center steel member 311. [

In the following, a second embodiment of a steel core member 200 applied to the present invention will be described with reference to the embodiment shown in FIG. The second embodiment differs from the first embodiment in terms of the configuration of the intermediate part 230 and the connecting part 210, and therefore, the following description will be made with reference to the deformation inducing part 300 which is different from the first embodiment.

Referring to FIG. 4, in the second embodiment of the steel core member 200 according to the present invention, the deformation inducing portion 300 includes a cutout portion formed by cutting a cross section at two or more positions of the steel core member 200, (330) so that plastic deformation of the steel core material (200) can be induced in the plurality of cutouts (330).

That is, the deformation inducing part 300 forms a portion having a smaller cross-sectional area than the other part through the cut-out part 330 which is made by cutting two or more parts of the steel core material 200 inward, So that plastic deformation can be caused at two or more portions of the steel core member 200. [0064] As shown in FIG.

At this time, it is preferable that the cut-out portion 330 is located at the intermediate portion 230.

The position and shape of the cut-out portion 330 may be variously shaped and shaped as long as the intermediate portion 230 can form a plurality of plastic deformation positions.

For example, the cut-out portion 330 is formed at a position where the intermediate portion 230 is tripled, and is formed by cutting grooves 331a and 331b cut inwardly from the edge of the core member 200 .

In other words, if the center portion of the steel core member 200 is formed adjacent to the center portion of the steel core member 200, the deformation of the center portion is concentrated, and the sectional area of the middle portion 230 is smaller than that of the connection portion 210, The plastic deformation of the steel core member 200 may not be performed well. Therefore, preferably, the cut-out portion 330 may be formed at a position where the intermediate portion 230 is trisected.

The cutouts 330 may be formed as cutting grooves 331a and 331b that are cut inward from the edges of the steel core material 200. The cutting grooves 331a and 331b may be curved .

When the cutout grooves 331a and 331b are formed in a square shape, stresses are concentrated on the angled portions and breakage may occur early. Therefore, the cutout grooves 331a and 331b are formed as curved lines, have.

Hereinafter, a third embodiment of the steel core member 200 according to the present invention will be described with reference to the embodiment shown in FIG. The third embodiment differs from the first embodiment in terms of the configuration of the intermediate portion 230 and the connecting portion 210, and therefore, the following description will be made with reference to the deformation inducing portion 300 which is different from the first embodiment.

In the third embodiment of the steel core material 200 applied to the present invention, the cut-out portion 330 may be formed of through holes 333a and 333b formed at two or more positions of the steel core material 200.

That is, the third embodiment of the steel core member 200 is characterized in that the cut-out portion 330 of the second embodiment is formed of the through holes 333a and 333b penetrating through the center of the steel core member 200 .

Accordingly, the deformation inducing portion 300 can induce plastic deformation at portions where the through holes 333a and 333b are formed. Therefore, since the through-holes 333a and 333b are formed in two or more portions, plastic deformation may occur in the steel core material 200 at two or more positions.

At this time, the positions of the through holes 333a and 333b may be applied without limitation, but they may be formed at the third intermediate position of the intermediate portion 230.

However, the positions and the numbers of the through holes 333a and 333b are not limited thereto. For example, the positions and the numbers of the through holes 333a and 333b may be formed at a portion other than the third portion of the intermediate portion 230, Of course it is possible.

Hereinafter, a fourth embodiment of the steel core member 200 according to the present invention will be described with reference to the embodiment shown in FIG. The fourth embodiment differs from the first embodiment in terms of the configuration of the intermediate part 230 and the connecting part 210, and therefore, the following description will focus on the deformation inducing part 300 which is different from the first embodiment.

In the fourth embodiment of the steel core material 200 according to the present invention, the deformation inducing part 300 includes the steel core material 200 as a first plate material 351 and a second plate material 353 The plastic deformation of the steel core material 200 can be induced at a plurality of positions by differentiating the plastic deformation position of the first plate material 351 and the second plate material 353.

That is, the first plate 351 and the second plate 353 may be installed to overlap with each other to form one steel core member 200, as in the embodiment shown in FIG. 6 (b) . In the illustrated embodiment, the first plate 351 and the second plate 353 are shown in the same shape, but the present invention is not limited thereto, and the first plate 351 and the second plate 353 may be made of steel having different shapes or different strengths.

At this time, the first plate 351 and the second plate 353 may not have the same position and the same position at which the plastic deformation occurs even when the same load is applied. Particularly, when the shape and strength of the first plate 351 and the second plate 353 are different, the plastic deformation capability of both plates may be different.

At this time, the thickness of the first plate 351 and the second plate 353 may be thinner than that of the first to third embodiments. For example, It can be manufactured to have a thickness of one steel core member 200 of the third embodiment. However, the thickness of the first plate 351 and the second plate 353 is not limited thereto, and various modifications are possible.

Accordingly, the deformation inducing part 300 doubles up the first plate material 351 and the second plate material 353, which have different plastic deformation positions, to form one steel core material 200, Plastic deformation can be caused to occur at two or more positions of the core member 200.

More preferably, the first plate 351 and the second plate 353 are disposed between the side steel plates 313 disposed on both sides and the side steel plates 313, and the side plates 313 The central steel member 311 of the first plate member 351 and the center steel member 311 of the second plate member 353 can be made different from each other.

Accordingly, plastic deformation occurs in two places of the first plate 351 and the second plate 353, and the locations where the plastic deformation occurs are different because the positions of the center steel 311 are different. Plastic deformation may occur at the above portion. Therefore, the ductility of the steel core member 200 can be further improved.

Meanwhile, the embodiment shown in FIG. 7 is a modification of the step 220 in the first embodiment.

The step 220 having a smaller sectional area may be curved between the connecting portion 210 of the steel core member 200 and the intermediate portion 230 as in the illustrated embodiment.

That is, when a load is transferred from the structure, the deformation and fracture of the core material 200 are concentrated at the center of the intermediate part 230 and at the angled part of the step 220.

Therefore, in the embodiment of the present invention, the stress is concentrated on the conventional angled portion by processing the step 220 with a curved line, thereby improving the strain and minimizing the fracture.

However, the stepped portion 220 processed by the curve is not limited to the first embodiment (FIG. 3), and can be applied to the second to fourth embodiments (FIGS. 4 to 7) to be.

Hereinafter, the effect of the unbending bucket 100 having the high ductility core according to the embodiment of the present invention will be described with reference to the experimental results shown in Figs. 8 and 9.

FIG. 8 is a load-strain curve showing the result of forging tensile test of a general core material and the first through fourth embodiments of the present invention, FIG. 9 is a graph showing load- This is the summary data of tensile test results. 8 and 9, A represents a general steel core material 200, B represents a steel core material 200 of the first embodiment, C represents a steel core material 200 according to the second embodiment, and D Shows the steel core member 200 according to the third embodiment, and E shows the steel core member 200 according to the fourth embodiment.

8 and 9, the yield strength of a general steel core material A is about 2000 kN and the tensile strength is about 3240 kN. In this case, the first embodiment (B) and the second embodiment (C) show a higher strain (DELTA failure ) than a general core material, and the second embodiment (C), the third embodiment 4 Example (E) shows higher tensile strength than general steel core material (A).

Particularly, in the fourth embodiment (E), the yield strength is the largest (2500 kN), and the first embodiment (B) shows the best result in the strain (DELTA failure = 352 mm).

Therefore, in the embodiment of the present invention, the fourth embodiment can be simultaneously applied to the first embodiment so as to obtain a new core material having high strength / high ductility. That is, the central steel member 311 made of high strength steel is applied to the middle portion 230 of the steel core member 200, and the details of the two plate members are superimposed. The steel core member 200 has a high strength It can be a core material having excellent strain.

As can be seen from the above experimental results, the unbending buckle 100 having the high ductility core according to the embodiment of the present invention has a tensile strength or strain hardness It is possible to provide an effect of improving the ductility and improving the energy absorbing ability as compared with a general steel core material 200.

According to the present invention, since the deformation inducing portion provided in the steel core core generates two or more positions of plastic deformation at one steel core material, the conventional plastic deformation position It is possible to obtain an effect that the ductility is improved and the energy dissipation capacity is further improved as compared with the steel core material generated in one place.

Also, since the energy dissipating capacity of the steel core material is improved, the seismic performance of the structure having the unbuckled bridge can be improved.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention, It will be appreciated that those skilled in the art will readily understand the present invention.

100: unbuckled new with high ductility core material 200: steel core material
210: connection part 220:
230: intermediate part 300: deformation inducing part
311: central steel member 313: side steel member
330: incision section 331a, 331b: incision section
333a, 333b: Through hole 351: First plate
353: second plate 10: base metal

Claims (9)

delete A base material having a hollow formed therein; And
And a deformation inducing part inserted in the base material and inducing deformation so that a plastic deformation according to a load transmitted from the structure occurs at two or more positions,
Wherein the deformation inducing portion is disposed such that the center steel material disposed at the center portion of the steel core material and the side steel material disposed at both side portions of the steel core material have different intensities and the center steel material is formed to have a higher strength than the both side steel materials, Characterized in that plastic deformation of the steel core material is induced on both sides of the central steel material.
3. The method of claim 2,
Wherein the steel core material comprises a connecting portion provided at both ends of the steel core material and connected to the structure and an intermediate portion provided between the connecting portions and having a smaller sectional area than the connecting portion,
And the length of the center steel member is 1/4 to 1/3 times the length of the intermediate member.
3. The method of claim 2,
Wherein the deformation inducing portion includes a cut portion formed by cutting a cross section at two or more positions of the steel core material so that plastic deformation of the steel core material is induced in the plurality of cut portions. . ≪ / RTI >
5. The method of claim 4,
Wherein the steel core material comprises a connecting portion provided at both ends of the steel core material and connected to the structure and an intermediate portion provided between the connecting portions and having a smaller sectional area than the connecting portion,
Wherein the cut-out portion is formed at a position where the middle portion is tripled, and the cut-out groove is formed by cutting a curved line inward from an edge of the steel core material.
5. The method of claim 4,
Wherein the cut-out portion comprises a through hole formed through at least two positions of the steel core material.
A base material having a hollow formed therein; And
And a deformation inducing part inserted in the base material and inducing deformation so that a plastic deformation according to a load transmitted from the structure occurs at two or more positions,
Wherein the deformation inducing portion comprises a first plate member and a second plate member which are overlapped with each other by two folds of the steel core member so that a plastic deformation position of the first plate member and the second plate member is made different, And a second core member having a high ductility core.
8. The method of claim 7,
Wherein the first plate and the second plate include a side steel disposed on both sides and a center steel disposed between the side steel and formed to have a higher strength than the side steel,
Wherein the center steel of the first plate and the center plate of the second plate are positioned differently from each other.
9. The method according to any one of claims 2 to 8,
Wherein the steel core material comprises a connecting portion provided at both ends of the steel core material and connected to the structure and an intermediate portion provided between the connecting portions and having a smaller sectional area than the connecting portion,
And a stepped portion having a smaller cross-sectional area, which is provided between the connecting portion and the intermediate portion, is treated as a curved line.
KR20130061222A 2013-05-29 2013-05-29 Buckling-restrained brace having high-ductility coreplate KR101461805B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200092824A (en) 2019-01-25 2020-08-04 고려대학교 산학협력단 O-shaped buckling-restrained brace with internal filler
CN111705944A (en) * 2020-06-19 2020-09-25 广州大学 Two-stage buckling-restrained energy dissipation support and energy dissipation method and application thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000213200A (en) 1999-01-20 2000-08-02 Shimizu Corp Damping construction
JP2010216611A (en) 2009-03-18 2010-09-30 Nippon Steel Corp Seismic response control metallic plate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000213200A (en) 1999-01-20 2000-08-02 Shimizu Corp Damping construction
JP2010216611A (en) 2009-03-18 2010-09-30 Nippon Steel Corp Seismic response control metallic plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200092824A (en) 2019-01-25 2020-08-04 고려대학교 산학협력단 O-shaped buckling-restrained brace with internal filler
KR20210025561A (en) 2019-01-25 2021-03-09 고려대학교 산학협력단 Improved buckling prevention brace
CN111705944A (en) * 2020-06-19 2020-09-25 广州大学 Two-stage buckling-restrained energy dissipation support and energy dissipation method and application thereof

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