Self-recovering sharp lead shear damper-apparatus

Abstract

A self-restoring shear friction damper device according to one embodiment of the present invention comprises: a housing having a pair of operating ends that are open toward opposite sides and a straight passage connecting the operating ends; a pair of operating walls that are coupled to each of the operating ends to close each of the operating ends and have an operating bar inlet formed in the center; an operating block that is accommodated inside the housing and has its position fixed by being inserted between the pair of operating walls through an elastic member; a pair of operating bars that transmit an external force applied from outside the housing to the operating block by passing through the operating bar inlets formed in each of the operating walls; a friction member interposed between the inner surface of the housing and the operating block to increase the frictional resistance force between the housing and the operating block; and a damping block interposed between the inner surface of the housing and the operating block to block linear movement of the operating block relative to the housing and to plastically deform the operating block so that it slides in one direction relative to the housing when an external force greater than a predetermined size is applied to the operating block.

Description

Technology Field

[0001] The present invention relates to a self-restoring shear friction damper device, and more specifically, to a shear friction damper device installed in a building structure to efficiently disperse and attenuate external forces so that the building structure can be safely preserved even under shocks such as earthquakes. Background Technology

[0002] Seismic resistance refers to a building structure withstanding earthquakes. Seismic design means designing a building structure to withstand an earthquake without being lost.

[0003] As earthquakes are natural phenomena, it is difficult to predict them in advance or completely prevent the damage caused by them.

[0004] Therefore, the basic concept of seismic design is to reduce damage to life and property by preventing the complete collapse of building structures when an earthquake occurs.

[0005] Building structures are equipped with seismic isolation systems. The seismic isolation devices provided in the seismic isolation system mainly consist of dampers and braces. Friction dampers, which absorb external forces applied to the braces through the relative movement of the friction surface, are widely used.

[0006] A building structure includes a foundation member and load-bearing columns and load-bearing beams that form the framework of the structure on the foundation member.

[0007] Bracing frames are additionally installed to reinforce load-bearing columns or beams supporting the structure, and the bracing frames distribute the external forces applied to the load-bearing columns or beams.

[0008] Korean Published Patent No. 10-2019-0091131 (hereinafter referred to as 'Related Technology 1') discloses a 'damper device utilizing smart materials capable of automatic restoration and self-healing'.

[0009] Related technology 1 discloses a guide unit arranged along a virtual load application line, a first moving unit and a second moving unit that reciprocate parallel to the load application line, and a deformation unit made of a shape memory alloy material connecting the first moving unit and the second moving unit.

[0010] The deformation unit of related technology 1 attenuates the external force and, after the external force is removed, restores the damper device to the state before the external force was applied.

[0011] However, the damper device disclosed in Related Technology 1 still had the disadvantage of high manufacturing costs due to its complex internal structure and various parts. In addition, the deformation unit made of shape memory alloy had the problem that it could easily break if a relatively large external force was applied.

[0012] Therefore, it was necessary to propose a technology to solve these problems. The problem to be solved

[0013] One objective of the present invention is to solve the problem of the prior art, which had to be reinstalled because it was easily damaged by earthquakes.

[0014] Another objective of the present invention is to solve the problems of the prior art, which had high manufacturing costs and high maintenance and repair costs due to a large number of parts and a complex internal structure.

[0015] Another objective of the present invention is to solve the problem of the prior art, which was difficult to additionally install or construct on existing building structures.

[0016] The objectives of the present invention are not limited to those mentioned above, and other unmentioned objectives or purposes may be understood from the following description. means of solving the problem

[0017] A self-restoring shear friction damper device according to one embodiment of the present invention comprises: a housing having a pair of operating ends that are open toward opposite sides and a straight passage connecting the operating ends; a pair of operating walls that are coupled to each of the operating ends to close each of the operating ends and have an operating bar inlet formed in the center; an operating block that is accommodated inside the housing and has its position fixed by being inserted between the pair of operating walls through an elastic member; a pair of operating bars that transmit an external force applied from outside the housing to the operating block by passing through the operating bar inlets formed in each of the operating walls; a friction member interposed between the inner surface of the housing and the operating block to increase the frictional resistance force between the housing and the operating block; and a damping block interposed between the inner surface of the housing and the operating block to block linear movement of the operating block relative to the housing and to plastically deform the operating block so that it slides in one direction relative to the housing when an external force greater than a predetermined size is applied to the operating block.

[0018] And, in a self-restoring shear friction damper device according to one embodiment of the present invention, the housing is formed as a rectangular parallepiped with the operating wall connected to each of the two operating ends.

[0019] Alternatively, in a self-restoring shear friction damper device according to one embodiment of the present invention, a pair of operating bars are located on a virtual straight line drawn along a first direction, and an external force applied from the outside is transmitted along the virtual straight line drawn along the first direction.

[0020] And, in a self-restoring shear friction damper device according to one embodiment of the present invention, the operating block includes a pair of working surfaces facing each of the pair of operating walls, a pair of shear deformation surfaces facing each other, and a pair of friction surfaces facing each other that connect the pair of shear deformation surfaces.

[0021] Alternatively, in a self-restoring shear friction damper device according to one embodiment of the present invention, the operating block is fixed at a predetermined force-balanced position as both sides are pressed by the elastic member inserted between the operating walls, with the operating surfaces facing each of the pair of operating walls in a compressed state.

[0022] And, in a self-restoring shear friction damper device according to one embodiment of the present invention, the housing comprises a pair of main friction walls facing each other and a pair of secondary friction walls facing each other that connect between the main friction walls, and a damping block is interposed between each of the main friction walls and the operating block, and a friction member is interposed between each of the secondary friction walls and the operating block.

[0023] Alternatively, in a self-restoring shear friction damper device according to one embodiment of the present invention, the shear deformation surface includes a plurality of irregularities formed in a direction perpendicular to the longitudinal direction of the housing, and the inner surface of the main friction wall in contact with the shear deformation surface includes a main resistance portion having irregularities formed in a shape corresponding to the irregularities, and the irregularities formed in the irregularities and the main resistance portion are interlocked and fixed.

[0024] In addition, in a self-restoring shear friction damper device according to one embodiment of the present invention, the damping block includes a shear resistance member that interlocks with one surface facing the uneven resistance member and the other surface facing the main resistance member, each having a shape corresponding to the unevenness formed in the unevenness resistance member and the unevenness formed in the main resistance member.

[0025] Alternatively, in a self-restoring shear friction damper device according to one embodiment of the present invention, the housing is a plate-shaped member parallel to the operating wall and is provided on both sides of the operating block, the damping block and the friction member to transmit the force transmitted through the operating bar and the elastic member to the operating block. Effects of the invention

[0026] According to the present invention, a shear friction damper device is provided that is not destroyed even by multiple earthquakes and maintains the performance of damping external forces.

[0027] According to the present invention, the simplification of parts and the convenience of assembly are increased, thereby enabling a reduction in manufacturing costs.

[0028] According to the present invention, a highly economical shear friction damper device can be provided by using a material that has a longer lifespan and higher durability while maintaining an excellent external force damping effect.

[0029] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below. Brief explanation of the drawing

[0030] FIG. 1 is a schematic diagram illustrating the state of use in which a shear friction damper device according to one embodiment of the present invention is applied to a building structure. FIG. 2 is a perspective view of a shear friction damper device according to one embodiment of the present invention. FIG. 3 is an exploded perspective view of a shear friction damper device according to one embodiment of the present invention. FIG. 4 is a cross-sectional view based on the XZ plane of a shear friction damper device according to one embodiment of the present invention. FIG. 5 is a cross-sectional view based on the XY plane of a shear friction damper device according to one embodiment of the present invention. FIG. 6 is an operating state diagram of a shear friction damper device according to one embodiment of the present invention. FIG. 7 is a graph illustrating the correlation between an external force applied to a shear friction damper device according to one embodiment of the present invention and the resulting displacement. Specific details for implementing the invention

[0031] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. In the following description, identical or similar components are assigned identical or similar reference numerals, and redundant descriptions thereof may be omitted. Furthermore, suffixes such as "module" or "part" for the components used do not inherently possess distinct meanings or roles. Descriptions of related prior art that may be presupposed in describing the embodiments of this specification are omitted. Additionally, the attached drawings are intended merely to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings.

[0032] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0033] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0034] In this specification, terms such as "comprising" or "having" indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and do not exclude any of the features, numbers, steps, actions, components, parts, or combinations thereof.

[0035] The first direction (X), the second direction (Y), and the third direction (Z) described in this specification represent each dimension and the directionality assigned to each dimension in a three-dimensional coordinate system used to represent a three-dimensional shape. Accordingly, the first direction (X), the second direction (Y), and the third direction (Z) each indicate a predetermined direction in a mutually orthogonal dimension.

[0036] Imaginary straight lines drawn along the first direction (X), second direction (Y), and third direction (Z) can meet at a single origin (0). And, each dimension can represent a specific point through a direction and distance relative to the origin (0).

[0037] The first direction (X) and the second direction (Y) can represent a first direction-second direction (XY) plane capable of representing two dimensions, the second direction (Y) and the third direction (Z) can represent a second direction-third direction (YZ) plane capable of representing two dimensions, and the first direction (X) and the third direction (Z) can represent a first direction-third direction (XZ) plane capable of representing two dimensions.

[0038] Of course, the first direction (X), the second direction (Y), and the third direction (Z) can represent positions or three-dimensional shapes in space (XYZ).

[0039] A shear friction damper device (1) is disclosed.

[0040] A shear friction damper device (1) according to one embodiment of the present invention can be installed in a building structure and protects the building structure from large shocks such as earthquakes.

[0041] Seismic design techniques, which are engineering methods to ensure structures are safe against earthquakes, are divided into seismic structures, seismic isolation structures, and seismic damping structures.

[0042] Safety standards applied to ensure the durability of engineered structures to withstand earthquakes vary by country.

[0043] While earthquakes can cause destruction and loss of life due to secondary effects such as landslides, tsunamis, fires, and fault activity, the greatest damage to life and property is the collapse of buildings above and below ground while the ground shakes violently. Therefore, from an engineering perspective, the most effective way to reduce earthquake-induced destruction is to design and construct buildings capable of withstanding strong ground motion. However, due to economic realities, building structures are not designed to withstand the full impact of every earthquake and are instead designed to minimize the impact of routine earthquakes.

[0044] Building designs aimed at reducing earthquake damage can be broadly categorized into seismic-resistant structures, seismic isolation structures, and seismic damping structures. A seismic-resistant structure refers to a design that strengthens the building's internal horizontal axis to enable it to withstand lateral vibrations. While seismic-resistant structures offer the advantage of robustness, they also have the disadvantage of significantly increasing the building's weight, making them difficult to apply to high-rise buildings.

[0045] Seismic isolation refers to a structure designed to make buildings flexible when the ground shakes during an earthquake, thereby preventing them from being destroyed by seismic vibrations. Damage is reduced by laying special flooring materials, such as laminated rubber in the lowest floors of buildings or bridges to dampen vibrations, and then constructing the foundation on top of them, making the building resilient to vibrations.

[0046] A representative seismic isolation structure is a method of reducing impact by inserting dampers, which are structures containing special devices that reduce the magnitude of earthquakes, between the building and columns. Seismic isolation structures are not constrained by the structure or form of existing buildings and allow for relatively free design.

[0047] A shear friction damper device (1) according to one embodiment of the present invention can be installed on building frames, such as load-bearing columns (50) and load-bearing beams (40), which are built on top of a foundation member (70), as shown in FIG. 1. Specifically, a bracing frame (30) may be additionally installed to reinforce the frame, such as the load-bearing columns (50) and load-bearing beams (40). The bracing frame (30) is a structure for damping shocks and vibrations applied to the load-bearing columns (50) and load-bearing beams (40), and the shear friction damper device (1) according to one embodiment of the present invention may be installed on the bracing frame (30).

[0048] A shear friction damper device (1) according to one embodiment of the present invention may be installed between a brace frame (30) and a brace frame (30) to attenuate external forces acting in a straight line, and external forces and vibrations that may occur in various ways in a building structure may be converted into forces acting along a virtual straight line using an axial force conversion member (60), etc., and transmitted to the shear friction damper device (1) according to one embodiment of the present invention.

[0049] FIG. 2 is a perspective view of a shear friction damper device (1) according to one embodiment of the present invention, and FIG. 3 is an exploded perspective view of a shear friction damper device (1) according to one embodiment of the present invention.

[0050] As illustrated in FIGS. 2 and 3, a shear friction damper device (1) according to one embodiment of the present invention includes a pair of operating bars (20) arranged on a virtual straight line drawn in a first direction (X-axis direction) and a housing (10) provided between the operating bars (20).

[0051] A pair of operating bars (20) are inserted into the interior of the housing (10) at one end, and the other end extends to opposite sides and protrudes outside the housing (10).

[0052] The operating bar (20) can be connected to a brace frame (30) and / or an axial force conversion member (60), and converts external forces, such as vibrations or shocks applied to a building frame including a load-bearing column (50) or a load-bearing beam (40), into a linear force acting along a first direction and transmits it to the housing (10). Specifically, it transmits it to an operating block (200) housed inside the housing (10).

[0053] The housing (10) may be a cuboid formed in the shape of a rectangular parallepiped. The housing (10) has a pair of operating sections formed as entrances that open toward opposite sides. The operating sections are connected by a straight passage. That is, between the operating sections, a main friction wall (120) and a secondary friction wall (130), which are outer walls forming a predetermined passage, are provided.

[0054] Four sides are surrounded by the main friction wall (120) and the secondary friction wall (130), forming a pair of operating sections and a straight passage connecting them.

[0055] An operating block (200) is accommodated on a straight passage inside the housing (10).

[0056] Additionally, an operating wall (110) is attached to each operating section. The operating wall (110) is firmly attached to the housing (10) to close the operating section.

[0057] And, an operating bar inlet (112) is formed in the center of the operating wall (110) so that the operating bar (20) can pass through.

[0058] The operating bar (20) passes through the operating bar inlet (112), and the external force is transmitted through the operating bar (20) to the operating block (200) inside the housing (10).

[0059] Accordingly, the housing (10) may be a rectangular prism and includes a pair of operating walls (110) located opposite each other, a pair of main friction walls (120) forming a space between the operating walls (110), and a pair of secondary friction walls (130).

[0060] The main friction wall (120) and the secondary friction wall (130) act to minimize movement of the operating block (200) inside the housing (10). Specifically, when an external force is transmitted to the operating block (200) through the operating bar (20), the main friction wall (120) and the secondary friction wall (130) reduce the external force by applying a relatively large shear friction force to the operating block (200), thereby reducing the external force by at least some of it.

[0061] Accordingly, a damping block (300) or friction member (500) is interposed between the main friction wall (120) and the operating block (200), and the secondary friction wall (130) and the operating block (200) so that the shear friction force between them can be increased.

[0062] First, an operating block (200) installed in the internal space of the housing (10) is fixed between a pair of operating walls (110) through a plurality of elastic members (400). The elastic members (400) press the operating block (200) inward from both operating walls (110), and the operating block (200) is fixed in a force-balanced state at a predetermined location inside the housing (10) as the elastic members (400) press against it from both sides while in a compressed state.

[0063] Additionally, the operating block (200) includes a pair of opposing main friction walls (120) and a pair of mutually facing shear deformation surfaces (230). Additionally, it includes a pair of secondary friction walls (130) and a pair of mutually facing friction surfaces (220). A friction member (500) is interposed between the friction surfaces (220) and the non-resistance portions (132) of the secondary friction walls (130).

[0064] The friction member (500) increases the frictional resistance between the friction surface (220) and the non-resistance part (132) as they come into contact and slide with each other.

[0065] Also, a damping block (300) is interposed between the main resistance part (122) and the shear deformation surface (230). The damping block (300) is made of a metal that undergoes plastic deformation at a predetermined temperature. In one embodiment of the present invention, the damping block (300) may be made of lead.

[0066] The damping block (300) includes a friction surface (310) facing the negative resistance portion (132) of the negative friction wall (130), a shear deformation surface (230) of the operating block (200), and a shear resistance portion (320) in contact with the main resistance portion (122) of the main friction wall (120).

[0067] At this time, the main resistance part (122) of the main friction wall (120), the shear resistance part (320) of the damping block (300), the uneven resistance part (232) formed on the shear deformation surface (230) of the operating block (200), and the shear resistance part (320) of the damping block (300) may have a plurality of uneven patterns formed in a direction perpendicular to the first direction, which is the direction of the force acting on the operating bar (20). The main resistance part (122) and the shear resistance part (320), the uneven resistance part (232) and the shear resistance part (320) facing each other may have shapes of unevenness formed on their respective surfaces that correspond to each other, and are joined by interlocking with each other.

[0068] That is, the operating block (200) used in the internal space of the housing (10) is restricted from moving through the shear friction force generated between the damping block (300) and the main resistance part (122) formed on the main friction wall (120) if the magnitude of the external force transmitted through the operating bar (20) is smaller than a predetermined magnitude.

[0069] Additionally, linear movement of the operating block (200) within the housing (10) is also restricted through a friction member (500) interposed between the operating block (200) and the resistance portion (132) of the friction wall (130).

[0070] FIG. 4 is a cross-sectional view based on the XZ plane of a shear friction damper device (1) according to one embodiment of the present invention, and FIG. 5 is a cross-sectional view based on the XY plane of a shear friction damper device (1) according to one embodiment of the present invention.

[0071] As shown in FIGS. 4 and 5, a pair of linear moving plates (140), which are plate-shaped members parallel to the operating wall (110), may be further provided inside the housing (10).

[0072] The linear moving plate (140) is positioned on both sides of the operating block (200) and the damping block (300), and the force applied from the operating bar (20) and / or the elastic member (400) is transmitted to the linear moving plate (140).

[0073] A pair of linear moving plates (140) move linearly within the housing (10) so that their gap narrows or widens, and transmit the force acting from the operating bar (20) and / or elastic member (400) to the operating block (200) and the damping block (300).

[0074] Additionally, a pair of linear moving plates (140) divide the space inside the housing (10) into three volumes. When a large external force is transmitted instantaneously through the operating bar (20), the linear moving plates (140) may use the gas filled between the divided spaces inside the housing (10) as a bumper to instantly attenuate the external force.

[0075] FIG. 6 is an operating state diagram of a shear friction damper device (1) according to one embodiment of the present invention, and FIG. 7 is a graph illustrating the correlation between an external force applied to a shear friction damper device (1) according to one embodiment of the present invention and the displacement resulting therefrom.

[0076] As illustrated in FIG. 6, when an external force is transmitted through the operating bar (20), the operating block (200) inside the housing (10) moves in a straight line in the direction in which the external force is applied. The damping blocks (300) in contact with both sides of the operating block (200) undergo plastic deformation of their uneven portions, thereby allowing the operating block (200) to move freely in a straight line.

[0077] At this time, the displacement a or c on the side where the external force is input is greater than the displacement b or d on the side where the external force is dissipated, and when the external force that was applied is removed, the operating block (200) returns to the force equilibrium position through the elastic member (400).

[0078] The damping block (300) made of lead has the characteristic that it undergoes plastic deformation in the process of the operating block (200) moving in response to an external force greater than a predetermined size and the operating block (200) returning to its original position through the elastic members (400).

[0079] As shown in FIG. 6, a shear friction damper device according to one embodiment of the present invention is a device intended for energy dissipation.

[0080] Energy dissipation can be expressed as the product of length and force, and it can be seen that the amount of closed area on the graph shown in FIG. 6 represents the product of length and force. The larger the amount of closed area, the greater the reduction in vibration energy, and the damper device can increase the amount of closed area by adjusting the size of the damping block (300) and the number of elastic members (400).

[0081] Embodiments of the present invention have been described above together with the drawings. These are exemplary and the present invention is not limited to the aforementioned embodiments and the contents of the drawings.

[0082] It is obvious to those skilled in the art that modifications to the present invention may be made within the scope of the disclosed technical concept. The described embodiments should be regarded as part of the present invention, and the scope of the present invention should not be determined solely by the described embodiments.

[0083] The scope of the present invention should be determined by the technical concept described in the claims. Furthermore, even if the operation or effect according to the configuration is not explicitly described while describing the embodiments of the present invention, it is obvious that the operation or effect predictable by said configuration should also be recognized as the present invention. Explanation of the symbols

[0084] 1: Damper device 10: Housing 20: Operating bar 30: Bracing frame 40: Load-bearing beam 50: Load-bearing column 60: Axial force conversion member 70: Foundation member 110: Operating wall 112: Operating bar entrance 120: Main friction wall 122: Main resistance part 130: Negative friction wall 132: Negative resistance part 140: Straight-line movement plate 200: Operating block 210: Actuating surface 220: Friction surface 230: Shear deformation surface 232: Uneven resistance part 300: Damping block 310: Friction surface 320: Shear resistance member 400: Elastic member 500: Friction member

Claims

Claim 1 A housing having a pair of operating sections that open toward opposite sides and a straight passage connecting the operating sections; a pair of operating walls coupled to each of the operating sections to close each of the operating sections, with an operating bar inlet formed in the center; an operating block accommodated inside the housing and fixed in position by being inserted between the pair of operating walls through an elastic member; a pair of operating bars that transmit an external force applied from outside the housing to the operating block by passing through the operating bar inlets formed in each of the operating walls; and a friction member interposed between the inner surface of the housing and the operating block to increase frictional resistance between the housing and the operating block. A self-restoring shear friction damper device comprising: a damping block interposed between the inner surface of the housing and the operating block to block linear movement of the operating block relative to the housing, and plastically deformed so that the operating block slides in one direction relative to the housing when an external force greater than a predetermined size is applied to the operating block; wherein the housing comprises a plate-shaped member parallel to the operating wall, provided on both sides of the operating block, the damping block, and the friction member to transmit force transmitted through the operating bar and the elastic member to the operating block, and a pair of linear movement plates that divide the space inside the housing into three sections and instantaneously attenuate the external force through gas filled in each of the divided spaces. Claim 2 A self-restoring shear friction damper device according to claim 1, wherein the housing is formed as a rectangular parallepiped with the operating wall connected to each of the two operating ends. Claim 3 A self-restoring shear friction damper device according to claim 1, wherein a pair of operating bars are positioned on an imaginary straight line drawn along a first direction and transmit an external force applied from the outside along the imaginary straight line drawn along the first direction. Claim 4 A self-restoring shear friction damper device according to claim 1, wherein the operating block comprises: a pair of working surfaces facing each of the pair of operating walls; a pair of shear deformation surfaces facing each other; and a pair of friction surfaces facing each other connecting the pair of shear deformation surfaces. Claim 5 In paragraph 4, the operating block is a self-restoring shear friction damper device in which both sides of the working surfaces facing a pair of operating walls are pressed by the elastic member inserted between the operating walls in a compressed state and fixed at a predetermined force-equilibrium position. Claim 6 A self-restoring shear friction damper device according to claim 4, wherein the housing comprises: a pair of main friction walls facing each other; and a pair of secondary friction walls facing each other connecting the main friction walls; wherein the damping block is interposed between the main friction walls and the operating block, and the friction member is interposed between the secondary friction walls and the operating block. Claim 7 In claim 6, the shear deformation surface comprises a plurality of irregular resistance portions formed in a direction perpendicular to the longitudinal direction of the housing; and the inner surface of the main friction wall in contact with the shear deformation surface comprises a main resistance portion having irregularities formed in a shape corresponding to the irregular resistance portions; and the irregularities formed in the irregular resistance portions and the main resistance portions are interlocked and fixed to each other, thereby forming a self-restoring shear friction damper device. Claim 8 A self-restoring shear friction damper device according to claim 7, wherein the damping block comprises a shear resistance part that interlocks with one surface facing the uneven resistance part and the other surface facing the main resistance part, each having a shape corresponding to the unevenness formed in the unevenness resistance part and the unevenness formed in the main resistance part. Claim 9 delete

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