KR200474621Y1 - Earthquake isolation apparatus - Google Patents

Abstract

The disclosed seismic isolator comprises a lower support, a vertical support provided on the lower support, an intermediate support disposed on the vertical support, a guide disposed on the intermediate support and extending in a vertical direction to oppose the side of the intermediate support, A horizontal slip portion which is disposed between the intermediate support portion and the upper support portion to allow horizontal displacement of the upper support portion with respect to the intermediate support portion and a guide portion which is fixed to the intermediate support portion and which is opposed to the outer side surface of the guide portion And a horizontal displacement limiting member having a projection.

Description

[0001] EARTHQUAKE ISOLATION APPARATUS [0002]

The present invention relates to an earthquake isolator, which limits horizontal displacement of a seismic isolation device in response to a first horizontal external force within a predetermined size range, and horizontally displaces To a seismic isolation device having a limiting member.

In general, construction of construction structures requires seismic design to prevent damages such as earthquakes and increase lifetime of structures. Especially, in case of bridges, there is a high concern about structural damage, and design and seismic strengthening works are needed to ensure stability. In the case of a bridge not subjected to seismic design, the seismic force acting in the horizontal direction is concentrated on the bridge support, so that the bridge support may be destroyed or the top plate may be detached or collapsed when an earthquake occurs.

In order to achieve such a seismic design, the construction structure includes an earthquake isolator. The seismic isolation device includes a support such as a vertical support, a disc support, and a horizontal slider to allow horizontal displacement of the seismic isolation device.

In the case of a general seismic isolation device, it is configured to accommodate displacement evenly in the horizontal direction. However, in the case of railway bridges and the like, a train has a relatively heavy load as compared with an automobile, and a large horizontal external force may act due to the movement and rotation of the train. Therefore, when the horizontal displacement of the seismic isolation device is largely caused by the rotation of the train or the like, the stability against the movement of the train can be lowered.

Therefore, it is possible to prevent a displacement of a predetermined size, for example, a displacement of the bridge deck by an external force generated by the vehicle, while allowing a displacement of a larger size, e.g., an external force generated by an earthquake Seismic isolators are needed.

The object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to limit the horizontal displacement of the seismic isolation device corresponding to the first horizontal external force within a predetermined size range, And to provide an earthquake isolator.

An earthquake isolator according to one embodiment of the present invention includes a lower support, a vertical support positioned on the lower support, an intermediate support disposed on the vertical support, A horizontal slider which is disposed between the intermediate support portion and the upper support portion to allow horizontal displacement of the upper support portion with respect to the intermediate support portion and is fixed to the intermediate support portion, And a horizontal displacement restricting member having a guide protrusion opposed to the outer surface of the portion.

In one embodiment, the horizontal displacement limiting member extends from the intermediate supporting portion toward the guide portion in a direction perpendicular to the throttling axis, and the guide portion adjacent to the guide projection extends in a direction parallel to the throttling axis.

In one embodiment, the intermediate support further includes a coupling portion to which the horizontal displacement limiting member is coupled.

In one embodiment, the seismic isolation device further includes a coupling member inserted into the coupling portion of the intermediate support portion and the horizontal displacement limiting member.

In one embodiment, the coupling member is a bolt formed with a groove so as to be able to break against an external force equal to or greater than a predetermined size.

In one embodiment, the seismic isolation device further includes a flange and a fluororesin plate disposed between the guide portion and the guide protrusion of the horizontal displacement limiting member.

According to the present invention, by adopting the horizontal displacement restricting member, the horizontal displacement is restricted with respect to an external external force equal to or smaller than a certain size, and the stability of the bridge due to the turning force, wind load, The seismic performance can be increased by allowing the horizontal displacement after the breakage of the limiting member when an external force equal to or greater than the magnitude, that is, the seismic force occurs.

In addition, the horizontal displacement limiting member is easy to assemble and install, is easy to install in the existing seismic isolation device, and easily sets the breakage external force of the coupling member, so that the separation of the horizontal displacement limiting member can be stably guided .

1 is a plan view showing an earthquake isolation apparatus according to an embodiment of the present invention.
2 is a rear view showing an earthquake isolator according to an embodiment of the present invention.
3 is a cross-sectional view of the seismic isolation device of FIG. 1 taken along the line II '.
4 is a cross-sectional view of the seismic isolation device of FIG. 1 taken along line II-II '.
FIG. 5 is a cross-sectional view of the earthquake isolator of FIG. 1 along II 'line when horizontal displacement occurs in a direction perpendicular to the throttling axis.
Fig. 6 is a cross-sectional view taken along the line II-II 'of Fig. 1 when horizontal displacement occurs in a direction perpendicular to the throttling axis.

Hereinafter, an earthquake isolation apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the appended claims are not intended to limit the invention to the particular forms disclosed, but to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged from the actual size in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only 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 referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

FIG. 1 is a plan view showing an earthquake isolation apparatus according to an embodiment of the present invention, and FIG. 2 is a rear view illustrating an earthquake isolation apparatus according to an embodiment of the present invention. 2 is a rear view of the seismic isolation device in which the lower support and the vertical support are removed. FIG. 3 is a sectional view of the seismic isolation device of FIG. 1 taken along the line I-I ', and FIG. 4 is a sectional view of the seismic isolation device of FIG. 1 taken along the line II-II'. Fig. 5 is a cross-sectional view of the seismic isolator of Fig. 1 along the line II 'when horizontal displacement occurs in a direction perpendicular to the throttling axis, Fig. 6 is a cross- Sectional view of the seismic isolation device taken along line II-II '.

1 to 4, an earthquake isolator according to one embodiment of the present invention includes a lower support 40, a vertical support 30 disposed on the lower support 40, a vertical support 30, An upper support portion 10 disposed on the intermediate support portion 20, a horizontal slider portion disposed between the intermediate support portion 20 and the upper support portion 10, an upper support portion 10 A horizontal slider disposed between the intermediate support portion 20 and the second upper support portion 50 and a horizontal slip portion disposed between the intermediate support portion 20 and restoring the horizontal displacement of the intermediate support portion 20 and the upper support portion 10. [ And a horizontal displacement restricting member 90 fixed to the intermediate support unit 20 and restricting the horizontal displacement of the intermediate support unit 20 and the upper support unit 10. [

The upper support portion 10 includes a horizontal plate extending in a direction parallel to the horizontal plane and a guide portion 12 extending in a direction perpendicular to the horizontal plate and facing the side surface of the intermediate support portion 20.

An upper structure is placed on the upper support portion 10, and the upper support portion 10 can be fixed to the upper structure using a coupling member such as a set anchor, a stud bolt, or the like.

A horizontal slip portion is disposed between the upper support portion 10 and the intermediate support portion 20. The horizontal slider includes a SUS plate 70 and a fluororesin plate 60.

The stop plate 70 and the fluororesin plate 60 are fixed to the upper support portion 10 and the intermediate support portion 20, respectively. For example, the stop plate 70 may be coupled to a lower surface of the upper support unit 10, and the fluororesin plate 60 may be fixed to a groove formed in the upper portion of the intermediate support unit 20, have. The suscep plate 70 may be formed of stainless steel, and the fluororesin plate 60 may be formed of a fluororesin such as polytetrafluoroethylene (PTFE). The suscep plate 70 and the fluororesin plate 60 may have a circular or polygonal shape in a plan view.

The horizontal slider prevents friction between the upper support portion 10 and the intermediate support portion 20 and slips between the upper support portion 10 and the intermediate support portion 20 when an external lateral pressure is applied, Shear deformation of the isolator occurs.

The vertical support 30 is disposed between the intermediate support portion 20 and the lower support portion 40. A guide groove 22 corresponding to the shape of the vertical support 30 is formed on the lower surface of the intermediate support 20 so as to guide the position of the vertical support 30, A similar type of groove may be formed on the upper surface.

The vertical support base 30 may have a polygonal shape such as a circle or a square on a plan view and may extend along a side of the vertical support base 30 in a direction parallel to a horizontal line on the side of the vertical support base 30. [ Extending side grooves may be formed. The side grooves may have an arc shape having a V-shape or a curved line.

For example, the vertical support 30 may be made of rubber, polyurethane, etc. In this embodiment, a urethane disc is used as the vertical support 30.

In addition, the vertical support base 30 may include at least one reinforcing plate. The reinforcing plate is embedded in the vertical support base 30 to reinforce the strength and elasticity of the vertical support base 30. [ As the reinforcing plate, a metal such as steel may be used. Alternatively, the vertical support 30 may not include a reinforcement plate. The thickness of the vertical support 30 may be about 10 mm to about 200 mm, and may vary depending on the desired strength and elasticity.

A front end member (50) is coupled to the intermediate supporting portion (20). The front end member 50 passes through the vertical support 30 and is inserted into the lower support 40. The front end member 50 may have a pin shape extending in the vertical direction. The front end member 50 connects the intermediate supporting portion 20, the vertical supporting frame 30 and the lower supporting portion 40 in a front end thereof to fix the horizontal position.

The lower support 40 may be coupled to the lower structure. For example, an anchor or the like may be inserted into a lower structure, and a bolt passing through the lower supporting portion may be fastened to the anchor to couple the lower supporting portion to the lower structure.

The restoring device (80) is engaged with the intermediate support part (20). A plurality of the restoration devices 80 may be disposed in correspondence with four sides of the intermediate support part 20, and two restoration devices may be disposed according to applications and functions of the seismic isolation device.

The restoring device 80 includes an elastic body 82, a pressing member 86 connected to one end of the elastic body and one end connected to the pressing member 86 through the elastic body 82, And a guide member (84) inserted into the guide groove (30). Further, in this embodiment, the first horizontal slip portion is disposed between the restoration device 80 and the guide portion 12 of the upper support portion 10. For example, a stance plate 14 is coupled to an inner surface of the guide portion 12, and a fluororesin plate 88 is coupled to the pressing member 86.

For example, the cross section of the elastic body 82 perpendicular to the direction of external force may have a circular or rectangular shape, and may have a shape extending in a direction parallel to the direction in which the external force is applied. For example, the elastic body 82 may have a cylindrical shape or a rectangular parallelepiped shape. The elastic body 82 may be made of a highly elastic material such as polyurethane, natural rubber, synthetic rubber, or vulcanized rubber.

The horizontal slider prevents friction between the guide part 12 and the restoration device 80 when the upper support part 40 horizontally moves in the throttling direction D1 with respect to the intermediate support part 20, Ensure horizontal displacement of the seismic isolator.

The horizontal displacement limiting member 90 is for restricting the displacement of the seismic isolation device in a specific direction, and may be for primarily restricting the displacement in the direction D2 perpendicular to the throttling axis.

Specifically, the horizontal displacement limiting member 90 is fixed to the intermediate member 20. In the present embodiment, the intermediate member 20 has a coupling portion 92 protruding in the horizontal direction, and the horizontal displacement limiting member 90 is engaged with the lower surface of the coupling portion 92. The horizontal displacement limiting member 90 may be coupled to the coupling portion 92 by a coupling member 94. For example, the coupling member 94 may be inserted into the coupling portion 92 and the horizontal displacement limiting member 90. Specifically, the engaging member 94 may be inserted in a direction perpendicular to the extending direction of the horizontal displacement limiting member 90, that is, the direction D2 perpendicular to the throttling axis.

The horizontal displacement limiting member 90 is for restricting horizontal displacement of the seismic isolation device in a predetermined direction corresponding to an external force generated due to a first horizontal external force of a certain size range, for example, a train passing through a bridge, It is necessary to allow the horizontal displacement of the seismic isolation device when a second horizontal external force, for example, a seismic force or the like greater than the size is applied.

For this purpose, the coupling member 94 may be a bolt or a shear pin. Since the grooved portion has a smaller thickness than the other portions and when an external force equal to or greater than a predetermined magnitude is applied, the stress is concentrated on the grooved portion to induce breakage of the engaging member 94, The fracture reliability can be improved as compared with the engaging member 94 having an engaging portion. When the coupling member 94 is broken, the coupling between the horizontal displacement limiting member 90 and the intermediate member 20 is disassembled, so that the horizontal displacement of the seismic isolation device may occur.

The horizontal displacement limiting member 90 extends in the horizontal direction toward the guide unit 12 in a direction D2 perpendicular to the throttling axis and extends in the vertical direction at the distal end of the horizontal displacement limiting member 90, A guide protrusion 96 facing the outer surface of the portion 12 is formed. Specifically, the guide protrusion 96 faces the outer surface of the guide portion 12 extending in parallel with the throttling direction D1. The guide protrusion 96 is not disposed on the outer surface of the guide portion 12 extending in parallel to the direction D2 perpendicular to the throttling axis. As a result, the horizontal displacement limiting member 90 does not restrict the displacement of the seismic isolation device in the throttling direction D1 but restricts the displacement in the direction D2 perpendicular to the throttling axis.

The horizontal displacement limiting member 90 may be appropriately arranged in accordance with the design of the seismic isolation device and the magnitude of the external force for setting the breakage and the like. In this embodiment, two horizontal displacement limiting members (90).

A horizontal slip portion is disposed between the guide protrusion 96 and the guide portion 12. The horizontal slip portion includes a slow plate 16 and a fluororesin plate 98.

The stop plate 16 and the fluororesin plate 98 are fixed to the guide part 12 and the guide protrusion 96, respectively. For example, the stop plate 16 may be coupled to the outer surface of the guide portion 12, and the fluororesin plate 98 may be coupled to the inner surface of the guide protrusion 98.

The horizontal slider prevents friction between the guide part 12 and the guide protrusion 98 when the upper support part 40 horizontally moves in the throttle direction D1 with respect to the intermediate support part 20, Ensure horizontal displacement of the seismic isolator.

In another embodiment, the horizontal slip portion including the suspension plate 16 and the fluororesin plate 98 may be omitted.

5, when the upper supporting part 40 is horizontally moved in the direction D2 perpendicular to the throttling axis with respect to the intermediate supporting part 20, compressive force is applied to the restoring device, and the elastic body 82 Is contracted in the direction in which the compressive force is applied, and correspondingly, it can expand in the direction perpendicular to the direction in which the compressive force is applied. When the external force applied to the elastic body 82 is removed or reduced, the elastic body 82 compressed by the elastic restoring force of the elastic body 82 itself expands in a direction parallel to the direction in which the compression force is applied, The horizontal displacement of the device can be restored.

Further, the restoring device located on the opposite side of the restoring device in which the elastic body shrinks can be separated from the guide part 12. [ Specifically, the stop plate 14 and the fluororesin plate 88 may be spaced apart from each other.

6, when an external force equal to or greater than a predetermined magnitude is applied in the direction D2 perpendicular to the throttling axis, the coupling member 94 is broken, and the horizontal displacement limiting member 90 and the intermediate member 20 The upper support portion 40 can be horizontally moved in the direction D2 perpendicular to the throttling axis with respect to the intermediate support portion 20. [

In Figs. 1 to 6, it is assumed that the flange of the horizontal slide portion and the fluororesin plate 98 are substantially in contact with each other, that is, the horizontal displacement in the direction D2 perpendicular to the throttle axis is hardly allowed However, depending on the use and application of the seismic isolation device, it may be designed such that the distance between the suspension plate 16 of the horizontal slip portion and the fluororesin plate 98 is spaced such that a certain degree of horizontal displacement is allowed.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit and scope of the invention as defined in the following claims. It can be understood that it is possible.

The seismic isolation device according to the present invention can be used for construction, bridges, plants, and offshore structures.

10: upper support 20: vertical support
30: vertical support base 40: lower support
50: intermediate support portion 80: restoring device
90: Horizontal displacement limiting member

Claims (6)

A lower support;
A vertical support provided on the lower support;
An intermediate support disposed on the vertical support;
An upper support portion disposed on the intermediate support portion and extending in a vertical direction and having a guide portion opposed to a side surface of the intermediate support portion;
A horizontal slider disposed between the intermediate support portion and the upper support portion to allow horizontal displacement of the upper support portion relative to the intermediate support portion; And
And a horizontal displacement limiting member disposed below the guide portion and fixed to the intermediate support portion and having a guide protrusion opposed to an outer surface of the guide portion,
Wherein the intermediate support portion includes a coupling portion to which the horizontal displacement limiting member is coupled, and the horizontal displacement limiting member is coupled to a lower surface of the coupling portion. 2. The image forming apparatus according to claim 1, wherein the horizontal displacement limiting member extends from the intermediate supporting portion toward the guide portion in a direction perpendicular to the throttling axis, and the guide portion adjacent to the guide projection extends in a direction parallel to the throttling axis Earthquake isolator. The seismic isolation device according to claim 2, wherein the engaging portion protrudes in the horizontal direction from the intermediate support portion. The seismic isolation device of claim 3, further comprising a coupling member inserted into the coupling portion of the intermediate support portion and the horizontal displacement limiting member. 5. The seismic isolation device according to claim 4, wherein the coupling member is a bolt or shear pin having a groove formed therein so as to be able to break against an external force of a predetermined size or more. The apparatus of claim 1, further comprising: a stop plate and a fluororesin plate disposed between the guide portion and the guide protrusion of the horizontal displacement limiting member.

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