Buckling restrained brace

Abstract

A non-buckling brace according to the present invention comprises a base material having a receiving portion defined internally and extending in a first direction, a core material inserted into the base material and extending in the first direction, and a buckling prevention member disposed between the base material and the core material and providing a repulsive force between the base material and the core material, wherein the buckling prevention member comprises a magnetic layer providing a repulsive force in a direction perpendicular to the first direction and an absorbing material that absorbs vibration.

Description

Technology Field

[0001] The present invention relates to a non-buckling brace. Background Technology

[0002] A brace refers to a structural member placed diagonally between columns and beams in steel structures to suppress structural deformation.

[0003] Generally, when a brace is subjected to compressive force, a decrease in load-carrying capacity occurs before plastic deformation due to buckling takes place. Conventionally, dampers such as hydraulic dampers or steel dampers were used in braces to prevent a decrease in load-carrying capacity.

[0004] Although hydraulic dampers have excellent seismic performance, they have the disadvantage of being expensive, so there is a trend in domestic construction sites to use steel dampers, which are cheaper.

[0005] One of the most commonly used types of steel dampers, the buckling restrained brace (BRB), has tube reinforcement outside the brace to prevent buckling, enabling ductile behavior under loads beyond the yield strength when subjected to compressive force, thereby providing greater energy dissipation capacity.

[0006] Currently, small-capacity (200kN) non-buckling braces for seismic reinforcement are being developed and used domestically; however, as seismic design standards become increasingly stringent, there is a need to develop high-capacity non-buckling braces with excellent energy dissipation capabilities. The problem to be solved

[0007] The problem that the present invention aims to solve is to provide a non-buckling brace capable of behaving more stably by dissipating energy while suppressing or preventing buckling that occurs in the brace.

[0008] The problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0009] A non-buckling brace according to one embodiment of the present invention comprises a base material having a receiving portion defined internally and extending in a first direction, a core material inserted into the base material and extending in the first direction, and a buckling prevention member disposed between the base material and the core material and providing a repulsive force between the base material and the core material, wherein the buckling prevention member comprises a magnetic layer providing a repulsive force to the core material in a direction perpendicular to the first direction and an absorbing material that absorbs vibration.

[0010] According to one embodiment of the present invention, the receiving portion of the base material is divided into a plurality of regions, and a buckling prevention member may be disposed in at least one of the plurality of regions.

[0011] According to one embodiment of the present invention, the base material may further include one or more partitions disposed between the plurality of regions.

[0012] According to one embodiment of the present invention, the partition wall can be detachably coupled to the base material.

[0013] According to one embodiment of the present invention, the base material may include a first body having a first receiving portion defined by being recessed from the inner surface and facing one surface of the core material, and a second body having a second receiving portion defined by being recessed from the inner surface and facing the opposite surface of the one surface.

[0014] According to one embodiment of the present invention, the buckling prevention member comprises a first buckling prevention member disposed in the first receiving portion and a second buckling prevention member disposed in the second receiving portion, and the first buckling prevention member and the second buckling prevention member may face each other with the core material in between.

[0015] According to one embodiment of the present invention, the magnet layer comprises a first magnet layer including a first surface facing the core material and a second surface opposite to the first surface, and a second magnet layer including a third surface facing the second surface and a fourth surface opposite to the third surface, wherein the second surface and the third surface may have the same polarity.

[0016] According to one embodiment of the present invention, the core material may include a first portion extending in the first direction and disposed inside the base material, and a second portion disposed on both sides of the first portion and having at least a portion disposed inside the base material.

[0017] According to one embodiment of the present invention, the second portion includes a protrusion extending in a direction perpendicular to the width direction of the first portion, and a receiving groove to which the protrusion is coupled may be defined at the end of the base material.

[0018] According to one embodiment of the present invention, the base material may include at least one of wood and steel.

[0019] According to one embodiment of the present invention, the absorbent material may include rubber. Effects of the invention

[0020] A non-buckling brace according to one embodiment of the present invention can behave more stably by dissipating energy while suppressing or preventing buckling occurring in the brace.

[0021] The effects according to the embodiments are not limited to those exemplified above, and a wider variety of effects are included in this specification. Brief explanation of the drawing

[0022] FIG. 1 is a drawing showing a non-buckling brace according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of a non-buckling brace according to one embodiment of the present invention. FIG. 3 is a drawing showing a cross-section of a non-buckling brace according to one embodiment of the present invention. Figure 4 is an enlarged view of the P region of Figure 3. FIG. 5 is a graph of the hysteresis curves of a conventional brace, a non-buckling brace, and a non-buckling brace according to one embodiment of the present invention. FIG. 6 is a perspective view of a magnetic layer according to one embodiment of the present invention. FIG. 7 is a diagram showing a cross-section of a magnet layer according to one embodiment of the present invention. FIGS. 8 and 9 are exploded perspective views of a non-buckling brace according to one embodiment of the present invention. FIG. 10 is a drawing exemplarily showing the buckling deformation of a conventional brace and the buckling deformation of a non-buckling brace according to one embodiment of the present invention. Specific details for implementing the invention

[0023] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims.

[0024] In this specification, where a component (or region, layer, part, etc.) is described as being "on," "connected," or "combined" with another component, it means that it may be directly placed / connected / combined with the other component, or that a third component may be placed between them.

[0025] Identical reference numerals denote identical components. Additionally, in the drawings, the thicknesses, proportions, and dimensions of the components are exaggerated for the effective illustration of the technical content.

[0026] "And / or" includes all one or more combinations that the associated configurations can define.

[0027] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0028] Additionally, terms such as "below," "lower side," "above," and "upper side" are used to describe the relationships between the components depicted in the drawings. These terms are relative concepts and are described based on the directions indicated in the drawings.

[0029] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Additionally, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and are explicitly defined herein unless interpreted in an ideal or overly formal sense.

[0030] Terms such as "include" or "have" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0031] FIG. 1 is a drawing showing a non-buckling brace according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of a non-buckling brace according to an embodiment of the present invention. FIG. 3 is a drawing showing a cross-section of a non-buckling brace according to an embodiment of the present invention. FIG. 4 is an enlarged view of area P of FIG. 3.

[0032] A non-buckling brace (10) according to one embodiment of the present invention may include a base material (100), a core material (200), and a buckling prevention member (300).

[0033] According to one embodiment of the present invention, the base material (100) extends in a first direction (DR1) and a receiving portion (110) is defined inside. The receiving portion (110) is formed in a direction that is recessed from the inner surface, so that an empty space may be defined inside the base material (100). For example, the base material (100) may be a tube having a polygonal or circular cross-section.

[0034] The base material (100) may include at least one of wood and steel.

[0035] For example, the base material (100) may be a steel tube made of steel. If the base material (100) is a steel tube, the damping ability against vibration is excellent, so the buckling resistance performance can be further improved.

[0036] For example, the base material (100) may be a wood tube composed of wood. If the base material (100) is a wood tube, the weight of the non-buckling brace (10) can be reduced, and the occurrence of an attractive force between the base material (100) and the buckling prevention member (300) can be suppressed or prevented.

[0037] According to one embodiment of the present invention, the base material (100) may further include a shielding member (not shown). The shielding member shields the magnetic field inside the base material (100) so that the magnetic force generated from the buckling prevention member (300) does not act on the outside of the non-buckling brace (10), thereby making it easier to utilize in areas affected by electromagnetic waves, such as data centers or semiconductor facilities.

[0038] For example, the shielding member may be an electromagnetic shielding sheet. Accordingly, the shielding member may be attached to a steel pipe or wooden tube constituting the base material (100).

[0039] In FIGS. 1 to 3 below, the base material (100) is shown as a square pipe extending in a first direction (DR1) and having a receiving portion (110) defined inside.

[0040] A receiving slot may be defined at the end of the base material (100). The base material (100) can be more easily joined to the core material (200) through the receiving slot.

[0041] According to one embodiment of the present invention, the base material (100) may have a structure that allows for separation and combination.

[0042] Specifically, the base material (100) may include a first body (100a) positioned facing one side (F1) of the core material (200) and a second body (100b) positioned facing the opposite side (F2) of the one side (F1).

[0043] As the base material (100) includes a first body (100a) and a second body (100b), the receiving portion (110) may also include a first receiving portion (111) and a second receiving portion (112). Here, the first receiving portion (111) is a receiving portion defined in the first body (100a), and the second receiving portion (112) is a receiving portion defined in the second body (100b).

[0044] According to one embodiment of the present invention, the base material (100) may include one or more partitions (120). The partitions (120) may be detachably coupled to the base material (100) as shown in FIG. 2, but are not limited thereto.

[0045] The partition (120) can divide the receiving portion (110) into multiple areas. That is, the partition (120) can be placed between the multiple areas.

[0046] In the following description, the first receiving portion (111) is divided into seven regions of 111a to 111g and the second receiving portion (112) is divided into seven regions of 112a to 112g, but it is not necessarily limited thereto.

[0047] According to one embodiment of the present invention, the core material (200) can be extended in a first direction (DR1). That is, the core material (200) can be extended in the same direction as the base material (100).

[0048] The core material (200) may include steel. For example, the core material (200) may be a steel frame including a surface (F1) extending along a first direction (DR1) and a surface (F2) opposite to the surface (F1).

[0049] When the core material (200) contains steel, a repulsive force is applied to the core material (200) by a magnet included in the buckling prevention member (300), thereby dissipating internal energy. A detailed explanation of this will be provided later.

[0050] According to one embodiment of the present invention, the core material (200) may include a first part (210) and a second part (220).

[0051] The first part (210) can be placed in a receiving portion (110) defined within the base material (100). That is, the first part (210) can be inserted into the base material (100).

[0052] The second part (220) is positioned at both ends of the first part (210) and can be connected to an external member (not shown), such as a column or girder. That is, the non-buckling brace (10) is connected to the outside through the second part (220) so as to suppress or prevent the column or girder from being deformed by external forces.

[0053] The second part (220) may include a protrusion (221). The protrusion (221) extends in a direction perpendicular to the width direction of the first part (210) and may be coupled with a slot defined in the base material (100).

[0054] The protrusion (221) and the receiving groove (slot) can be joined at least one end to form a non-buckling brace (10). For example, the protrusion (221) and the receiving groove (slot) can be joined at one end by welding, and the other end can be fastened with a bolt that is movable in the first direction (DR1).

[0055] Accordingly, even when a load is applied to the non-buckling brace (10), the separation of the base material (100) and the core material (200) is suppressed, and even when an excessive vertical load is applied to the non-buckling brace (10) and deformation occurs in the core material (200), the deformation of the base material (100) can be suppressed.

[0056] According to one embodiment of the present invention, a buckling prevention member (300) is disposed between a base material (100) and a core material (200) and can provide a repulsive force to the core material (200).

[0057] Specifically, the buckling prevention member (300) may be placed in at least one of a plurality of partitioned areas within the receiving portion (110).

[0058] According to one embodiment of the present invention, the buckling prevention member (300) may include a first buckling prevention member (300a) disposed in a first receiving portion (111) and a second buckling prevention member (300b) disposed in a second receiving portion (112).

[0059] The first buckling prevention member (300a) and the second buckling prevention member (300b) can be positioned to face each other with the core material (200) in between. That is, as shown in FIG. 3, when the first buckling prevention member (300a) is positioned in area (111a), the second buckling prevention member (300b) can be positioned in area (112a), which is located in a position facing area (111a).

[0060] By arranging the first buckling prevention member (300a) and the second buckling prevention member (300b) so as to face each other, the deformation of the core material (200) by the buckling prevention member (300) can be minimized.

[0061] In the drawings below, it is shown that buckling prevention members (300) are placed in all multiple areas, but this is not limited thereto, and there may be areas where buckling prevention members (300) are not placed.

[0062] According to one embodiment of the present invention, the buckling prevention member (300) includes a magnet layer (310) and an absorbent material (320).

[0063] The magnetic layer (310) can provide a repulsive force to the core material (200) in a second direction (DR2) which is perpendicular to the first direction (DR1). Here, providing a repulsive force to the core material (200) means that a force is applied to the core material (200) in a direction from the base material (100) to the core material (200) in a cross-section perpendicular to the first direction (DR1).

[0064] That is, by providing a repulsive force to the core material (200) through the magnetic layer (310), when the core material (200) is deformed by buckling in one direction, a force can be provided through the magnetic layer (310) in a direction opposite to the direction of deformation of the core material (200).

[0065] Through this, deformation of the core material (200) due to loads acting on the non-buckling brace (10) can be suppressed, and furthermore, energy dissipation within the core material (200) can be induced to suppress or prevent energy concentration in the core material (200).

[0066] According to one embodiment of the present invention, the magnet layer (310) may include a first magnet layer (311) and a second magnet layer (312).

[0067] The first magnetic layer (311) may be positioned to face the core material (200). That is, the first magnetic layer (311) may include a first surface (A) facing the core material (200) and a second surface (B) opposite to the first surface (A).

[0068] The second magnet layer (312) may be positioned between the first magnet layer (311) and the base material (100) so as to face the first magnet layer (311). That is, the second magnet layer (312) may include a third surface (C) facing the second surface (B) and a fourth surface (D) opposite the third surface (C).

[0069] According to one embodiment of the present invention, the second surface (B) and the third surface (C), which are surfaces facing each other, may have the same polarity. For example, if the second surface (B) is an S pole, the third surface (C) may also have an S pole.

[0070] As the second surface (B) and the third surface (C) have the same polarity, a repulsive force may act between the first magnet layer (311) and the second magnet layer (312). Specifically, the repulsive force acts to move the first magnet layer (311) and the second magnet layer (312) away from each other, thereby generating a pushing force between the core material (200) and the base material (100).

[0071] According to one embodiment of the present invention, the magnetic force of the magnet layer (310) may vary depending on the arrangement within the receiving portion (110).

[0072] For example, in FIG. 3, the repulsive force of the magnet layer (310) placed in the region (111d) and region (112d) located at the center of the base material (100) in the first direction (DR1) is the greatest, and as it moves toward the bidirectional corners of the base material (100), the magnetic force of the magnet layer (310) decreases, so that the repulsive force of the magnet layer (310) placed in the region (111a), region (112a), region (111g), and region (112g) corresponding to the corners may be the weakest. A detailed explanation of this will be provided later.

[0073] If the magnetic layer (310) is positioned in the center with respect to the first direction (DR1), the magnetic force is greater, making it easier to suppress the decrease in strength or deformation of the center, where the risk of buckling is highest.

[0074] However, it is not limited to this, and the buckling prevention member (300) may be positioned so that the magnetic force at the point with the largest deformation, inferred from Euler's buckling load, is the greatest.

[0075] According to one embodiment of the present invention, the absorbent material (320) may be disposed between the core material (200) and the magnet layer (310) and between the base material (100) and the magnet layer (310).

[0076] For example, as illustrated in FIG. 4, the absorbent material (320) may include a first absorbent material (321) disposed between the core material (200) and the first magnet layer (311), and a second absorbent material (322) disposed between the base material (100) and the second magnet layer (312).

[0077] In the following description, there is a spaced-apart empty space between the first magnet layer (311) and the second magnet layer (312), but this is not limited thereto, and an absorbent material (320) may also be placed between the first magnet layer (311) and the second magnet layer (312).

[0078] Additionally, in the above embodiment, the buckling prevention member (300) is described as having a first magnet layer (311), a second magnet layer (312), a first absorbent material (321), and a second absorbent material (322), but it is not limited thereto, and there are no particular restrictions on the number and arrangement structure of the magnet layer (310) and the absorbent material (32).

[0079] For example, the absorbent material (320) may further include side absorbent materials (323, 324). The side absorbent materials (323, 324) may be placed on the side of the partition wall (120), which is the side of the first magnet layer (311) and the second magnet layer (312), as shown in FIGS. 2 to 4, or additionally placed on the inner side of the base material (100) to separate the base material (100) from the magnet layer (310).

[0080] The absorbent material (320) may include rubber. The absorbent material (320) can absorb vibrations and noise generated in the non-buckling brace (10). That is, by the absorbent material (320) absorbing the internal force applied to the non-buckling brace (10), the non-buckling brace (10) can behave more stably.

[0081] In addition, by placing a magnetic layer (310) between the first absorbent material (321) and the second absorbent material (322), the magnetic layer (310) can additionally absorb vibrations and noise caused by the repulsive force applied to the base material (100), core material (200), and partition wall (120).

[0082] Accordingly, the separation and detachment of the bond inside the buckling prevention member (300) and the bond between the base material (100) and the core material (200) due to vibration can be suppressed or prevented, and furthermore, the expected lifespan of the non-buckling brace (10) can be improved.

[0083] A non-buckling brace (10) according to one embodiment of the present invention includes a buckling prevention member (300), thereby not only suppressing or preventing buckling caused by a load applied to a core material (200), but also effectively dissipating energy applied to the non-buckling brace (10) through a magnet layer (310) and an absorbent material (320), and furthermore, enabling stable behavior.

[0084] For a more detailed explanation of this, refer to Fig. 5.

[0085] FIG. 5 is a hysteresis curve graph of a conventional brace, a non-buckling brace, and a non-buckling brace according to an embodiment of the present invention. Here, the hysteresis curve graph disclosed in FIG. 5 is a graph calculated through the quasi-static cyclic load loading protocol specified in US AISC 341-22.

[0086] Specifically, a load having a displacement 1.5 times the maximum displacement that a brace may experience due to an earthquake or other external load is repeatedly applied until a cumulative deformation corresponding to at least 200 times the yield deformation occurs. In FIG. 5, in case (a), an experiment was conducted on a general brace composed of a core material (200) without including a base material (100) and a buckling prevention member (300); in case (b), an experiment was conducted on a non-buckling brace that includes a base material (100) and a core material (200) but has an empty receiving portion (110) without a buckling prevention member (300); and in case (c), an experiment was conducted on a non-buckling brace that includes a base material (100), a core material (200), and a buckling prevention member (300) according to an embodiment of the present invention.

[0087] Additionally, the size of the core material (200) used in the above test is 350mm × 20mm × 5mm, and the length of the first direction (DR1) of the base material (100) is 200mm.

[0088] As shown in FIGS. 2 and 3, seven pairs of magnets are arranged in each of the first receiving portion (111) and the second receiving portion (112), and the magnitude of the repulsive force provided to the core material (200) by each of the first receiving portion (111) and the second receiving portion (112) in which the magnets are arranged is 500 N.

[0089] Specifically, the size of each magnet placed at both ends is 20mm × 7.5mm × 5mm, and the size of each magnet placed on the remaining inner side is 20mm × 25mm × 5mm.

[0090] In FIG. 5, the vertical axis represents the hysteretic displacement value of the core material (200) and the unit is mm. The horizontal axis represents the internal force due to deformation of the core material (200) and the unit is kN.

[0091] Referring to FIG. 5, in case (a) which does not include the base material (100) and the buckling prevention member (300), buckling occurred, and accordingly, it can be seen that the hysteresis curve graph is skewed in one direction.

[0092] In case (b), buckling is prevented by including the base material (100), but it can be seen that the repetition of the hysteresis curve proceeds because energy absorption and dissipation are difficult.

[0093] On the other hand, in the case of (c), it can be seen that the displacement and internal force of the hysteresis curve decrease more rapidly compared to (b).

[0094] That is, in the case of (c), not only was the occurrence of buckling prevented through the base material (100) and the buckling prevention member (300), but the magnet layer (310) and absorbing material (320) included in the buckling prevention member (300) also operated stably when subjected to repetitive loads, the rigidity was maintained, and energy was effectively absorbed.

[0095] As a result, it can be confirmed that the non-buckling brace (c) according to one embodiment of the present invention behaves stably even at large displacements, suppresses performance degradation caused by repeated loading, and has excellent fatigue resistance.

[0096] Other embodiments are described below. In the following embodiments, the description of components identical to those already described is omitted or simplified, and the explanation focuses on the differences.

[0097] FIG. 6 is a perspective view of a magnet layer according to one embodiment of the present invention. FIG. 7 is a cross-sectional view of a magnet layer according to one embodiment of the present invention.

[0098] Referring to FIGS. 6 and FIGS. 7, the non-buckling brace according to one embodiment of the present invention differs from the embodiment of FIGS. 1 to 4 in that it further includes a frame (313_1).

[0099] Specifically, the magnet layer (310_1) may further include a frame (313_1) on which the magnet (M_1) is placed. The frame (313_1) may be plastic manufactured using 3D printing equipment, but is not limited thereto.

[0100] The frame (313_1) may be defined with one or more receiving grooves (314_1) that are recessed in the second direction (DR2).

[0101] A magnet (M_1) may be placed in the receiving groove (314_1). To this end, the cross-sectional area of ​​the receiving groove (314_1) may be the same as the size of the magnet (M_1), but is not necessarily limited thereto.

[0102] Meanwhile, the frame (313_1) may include a connecting projection (315_1) that protrudes in a direction perpendicular to the second direction (DR2) from the receiving groove (314_1).

[0103] The coupling projection (315_1) can prevent the magnet (M_1) from moving in the second direction (DR2) after the magnet (M_1) is placed in the receiving groove. For example, as shown in FIGS. 6 and 7, the coupling projection (315_1) may have the shape of an inclined surface whose length increases along the direction in which the receiving groove (314_1) is recessed.

[0104] The coupling projection (315_1) may include an elastic portion (not shown) on the inner side. Accordingly, the coupling projection (315_1) moves into the interior of the frame (313_1) when the magnet (M_1) moves in the second direction (DR2) and is coupled to the receiving groove (314_1), and can protrude again through the restoring force of the elastic portion after the magnet (M_1) is placed in the receiving groove (314_1).

[0105] That is, by including a coupling projection (315_1) in the frame (313_1), it is possible to suppress or prevent the magnet (M_1) from moving in the second direction (DR2) by magnetic force and detaching from the frame (313_1).

[0106] According to one embodiment of the present invention, a frame (313_1) may have a second receiving groove (314b_1) corresponding to a first receiving groove (314a_1) defined on one side. Accordingly, a magnet (M_1) placed in the first receiving groove (314a_1) may form a first magnet layer (311_1), and a magnet (M_1) placed in the second receiving groove (314b_1) may form a second magnet layer (312_1).

[0107] The second receiving groove (314b_1) can be defined on a surface corresponding to the surface where the first receiving groove (314a_1) is defined. For example, as shown in FIGS. 6 and 7, the first receiving groove (314a_1) can be defined on the upper surface of the frame (313_1), and the second receiving groove (314b_1) can be defined on the lower surface of the frame (313_1).

[0108] The first receiving groove (314a_1) and the second receiving groove (314b_1) can be arranged side by side with respect to the second direction (DR2). That is, the first receiving groove (314a_1) and the second receiving groove (314b_1) can be arranged at the same position and size when viewed from the second direction (DR2).

[0109] Through this, the repulsive force generated between the magnets is suppressed from being formed in a direction other than the second direction (DR2), and the repulsive force acts only in the second direction (DR2), thereby suppressing or preventing the magnet (M_1) from moving sideways.

[0110] FIGS. 8 and 9 are exploded perspective views of a non-buckling brace according to one embodiment of the present invention.

[0111] Referring to FIGS. 8 and 9, a non-buckling brace (10_2, 10_3) according to one embodiment of the present invention differs from the embodiment of FIGS. 1 to 7 in that the buckling prevention member (300_2) is placed only in a part of the receiving portion (110) in which a plurality of regions are defined.

[0112] According to one embodiment of the present invention, the buckling prevention member (300_2) may be placed only in some of the areas (111a ~ 111g, 112a ~ 112g) defined in the receiving portion (110) and may not be placed in other areas.

[0113] For example, as shown in FIG. 8, the non-buckling brace (10_2) may have buckling prevention members (300_2) placed only in the regions (111d) and (112d), which are located in the center in the first direction (DR1).

[0114] Alternatively, as illustrated in FIG. 9, a non-buckling brace (10_3) may have a first buckling prevention member (300a_3) disposed in the central region (111d) and (112d) in the first direction (DR1), and a second buckling prevention member (300b_3), which has weaker magnetism than the first buckling prevention member (300a_3), disposed in the central region (111b) and (112b) of the upper region (111a ~ 111c, 112a ~ 112c) and the central region (111f) and (112f) of the lower region (111e ~ 111g, 112e ~ 112g).

[0115] When a buckling prevention member (300_2, 300a_3) is placed in the central region (111d, 112d) of the receiving portion (110), the core material (200) may buckle in a form where the center is supported. That is, as the central region (111d, 112d) is fixed, the core material (200) may be induced to buckle independently in the upper region (111a ~ 111c, 112a ~ 112c) and the lower region (111e ~ 111g, 112e ~ 112g), respectively. For a detailed explanation of this, FIG. 10 is further referenced.

[0116] FIG. 10 is a drawing that exemplarily illustrates the buckling deformation of a conventional brace and the buckling deformation of a non-buckling brace according to an embodiment of the present invention. Specifically, FIG. 10 (a) exemplarily illustrates the occurrence of buckling in a conventional brace to which a buckling prevention member (300) is not applied, (b) exemplarily illustrates the occurrence of buckling in a non-buckling brace (10_2) shown in FIG. 8, and (c) exemplarily illustrates the occurrence of buckling in a non-buckling brace (10_3) shown in FIG. 9.

[0117] Referring further to Fig. 10, when a load is applied to a brace and buckling occurs, in the case where there are no support points, buckling occurs with a large slenderness ratio, as in the brace of (a) where both ends are supported.

[0118] In this regard, in the case of the non-buckling brace (10_2) of (b) corresponding to one embodiment of the present invention, a buckling prevention member (300) is placed in the central region (111d, 112d), so that the central region is fixed and independent buckling occurs in the upper region and the lower region, respectively.

[0119] As a result, the non-buckling brace (10_2) according to one embodiment of the present invention causes buckling of a shape with reduced slenderness ratio, thereby reducing the amount of deformation, and furthermore, suppresses irregular deformation and allows energy dissipation to be performed more easily.

[0120] In addition, in the case of the non-buckling brace (10_3) of (c) corresponding to one embodiment of the present invention, not only is a buckling prevention member (300a_3) placed in the central region (111d, 112d), but additional buckling prevention members (300b_3) are also placed in the upper central region and lower central region (111b), (111f), (112b), and (112f), so that buckling with an increased number of support points occurs.

[0121] In particular, a first buckling prevention member (300a_3) with strong magnetism is placed in the center, and a second buckling prevention member (300b_3) with weak magnetism is placed in the upper center and the lower center. After the center is fixed through the first buckling prevention member (300a_3) and the buckling of the upper region and the lower region are induced independently, the upper region and the lower region are also fixed at their respective centers through the second buckling prevention member (300b_3), so that buckling can occur separately in the upper and lower regions.

[0122] If the magnetism of the second buckling prevention member (300b_3) is greater than or equal to the magnetism of the first buckling prevention member (300a_3), it may be difficult to dissipate energy through magnetism, and buckling with a long aspect ratio may occur.

[0123] For example, if a buckling prevention member (300_3) is placed in the 1 / 4 area (111b, 112b), the central area (111d, 112d), and the 3 / 4 area (111f, 112f), and the support of the core material (200) occurs preferentially in the second buckling prevention member (300b_3) placed in the 1 / 4 area, the buckling prevention member (300_3) is not placed in the area (111e, 112e) corresponding to the central area of ​​the long area (111c ~ 111g, 112c ~ 112g), so the central area may not be supported.

[0124] Accordingly, it may be difficult to suppress buckling in the long region (111c ~ 111g, 112c ~ 112g), so the magnetism of the first buckling prevention member (300a_3) may be stronger than the magnetism of the second buckling prevention member (300b_3).

[0125] Additionally, in FIGS. 9 and 10, the first buckling prevention member (300a_3) and the second buckling prevention member (300b_3) are each shown as being arranged in pairs in the 1 / 4 section, the center, and the 3 / 4 section, but this is not necessarily limited thereto, and multiple pairs may be arranged in any one of the 1 / 4 section, the center, and the 3 / 4 section.

[0126] As a result, the non-buckling brace (10_3) according to one embodiment of the present invention causes buckling with a shape having a further reduced aspect ratio, thereby further reducing the amount of deformation and making it easier to dissipate energy.

[0127] In conclusion, the non-buckling brace (10_2, 10_3) according to one embodiment of the present invention can effectively suppress or prevent buckling of the core material (200) even when using and placing fewer buckling prevention members (300_2, 300a_3) as the buckling prevention member (300_2) is placed in the central region (111d, 112d), and furthermore, by additionally placing a second buckling prevention member (300b_3), the buckling of the core material (200) can be further suppressed or prevented.

[0128] Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention may be implemented in other specific forms without changing the technical concept or essential features thereof. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. Explanation of the symbols

[0129] 10: Non-buckling brace 100: Base material 100a: First body 100b: Second body slot: receiving slot 110: Reception Department 120: Bulkhead 200: Heart 210: Part 1 220: Part 2 300: Buckling prevention member 310: Magnetic layer 311: 1st magnetic layer 312: Second magnetic layer 320: Absorbent material 321: First absorbent 322: Second absorbent DR1: First direction DR2: Second Direction

Claims

Claim 1 A non-buckling brace comprising: a base material having a receiving portion defined internally and extending in a first direction; a core material inserted into the base material and extending in the first direction; and a buckling prevention member disposed between the base material and the core material and providing a repulsive force between the base material and the core material; wherein the buckling prevention member comprises a magnetic layer providing a repulsive force to the core material in a direction perpendicular to the first direction and an absorbing material that absorbs vibration. Claim 2 A non-buckling brace according to claim 1, wherein the receiving portion of the base material is divided into a plurality of regions, and a buckling prevention member is disposed in at least one of the plurality of regions. Claim 3 In paragraph 2, the base material further comprises one or more bulkheads disposed between the plurality of regions, a non-buckling brace. Claim 4 In paragraph 3, the bulkhead is a non-buckling brace that is detachably connected to the base material. Claim 5 A non-buckling brace according to claim 1, wherein the base material comprises: a first body having a first receiving portion defined by being recessed from the inner surface and facing one side of the core material; and a second body having a second receiving portion defined by being recessed from the inner surface and facing the opposite side of the one side. Claim 6 In claim 5, the buckling prevention member comprises: a first buckling prevention member disposed in the first receiving portion; and a second buckling prevention member disposed in the second receiving portion; wherein the first buckling prevention member and the second buckling prevention member face each other with the core member in between, a non-buckling brace. Claim 7 The non-buckling brace according to claim 1, wherein the magnet layer comprises: a first magnet layer including a first surface facing the core material and a second surface opposite to the first surface; and a second magnet layer including a third surface facing the second surface and a fourth surface opposite to the third surface, wherein the second surface and the third surface have the same polarity. Claim 8 A non-buckling brace according to claim 1, wherein the core material comprises: a first portion extending in the first direction and disposed inside the base material; and a second portion disposed on both sides of the first portion and having at least a portion disposed inside the base material. Claim 9 In claim 8, the second part includes a protrusion extending in a direction perpendicular to the width direction of the first part, and a receiving groove defined at the end of the base material to which the protrusion is coupled, a non-buckling brace. Claim 10 In claim 1, the base material comprises at least one of wood and steel, a non-buckling brace. Claim 11 In claim 1, the absorbent material comprises rubber, a non-buckling brace.

Images