KR20200141693A - Stop device for limitting displacement of vibration isolation device, vibration isolation device and structure including the same - Google Patents

Abstract

Disclosed is a stop device for limiting displacement of a vibration isolation device. The stop device for limiting displacement of a vibration isolation device includes a plurality of wires of which a lower end is connected to one portion of a lower plate of the vibration isolation device and an upper end is connected to one portion of an upper plate of the vibration isolation device, wherein the plurality of wires include: a first wire provided to have a length to which tensile force is applied when horizontal displacement greater than design displacement of the vibration isolation device occurs between the lower plate and the upper plate; and a second wire having a length longer than that of the first wire. The tensile force is firstly applied to the first wire before the second wire when the horizontal displacement occurs in the vibration isolation device.

Description

A stop device for limiting displacement of a seismic isolator, and a seismic isolator and structure including the same {STOP DEVICE FOR LIMITTING DISPLACEMENT OF VIBRATION ISOLATION DEVICE AND STRUCTURE INCLUDING THE SAME}

The present application relates to a stop device for limiting the displacement of a seismic isolator, a seismic isolator and a structure including the same.

The seismic isolator for earthquake protection serves to reduce the seismic load propagating from the ground by making the upper structure long. Since this seismic isolator exhibits a horizontally flexible behavior, a large displacement occurs during an earthquake. The most widely used seismic isolator is made of rubber as a base material, and includes elastic rubber bearings, high damping rubber seismic isolators, and lead-inserted rubber seismic isolators.

However, in general, shear failure occurs in rubber at a strain rate of about 400%. Therefore, if the response displacement is greater than this when an earthquake occurs, the rubber may be damaged and the seismic isolator may be damaged, causing damage to the upper structure. In addition, when the rubber radius of the seismic isolator is relatively small, when a large horizontal displacement occurs, the seismic isolator may be buckling and the upper structure may collapse.

In order to prevent such damage, when a seismic isolator is installed on an important structure such as a nuclear power plant, a stop (hard stop or moat wall) that limits excessive horizontal displacement of the seismic isolator is installed around the upper structure. At this time, the separation distance of the stationary body is determined within the range that the seismic isolator is not damaged by horizontal deformation.

However, the conventional stationary body has the following problems.

배가 된다. 따라서 면진장치의 파괴변위를 벗어날 수 있다.Since the general upper structure has a rectangular shape, when the stationary body is manufactured in a wall-type shape, all sides are surrounded by a square. At this time, if the separation distance is set within the breaking displacement of the seismic isolator, this can be the distance in one axis direction. However, since the earthquake response is a motion on a plane, the maximum response may occur in a diagonal direction of 45˚ rather than the direction of the reference axis of the rectangular structure. In this case, the separation distance of the stationary structure surrounded by a square is

Doubles. Therefore, it is possible to escape the destruction displacement of the seismic isolator.

In addition, since the wall-type stationary body restricts the behavior of the entire upper structure, it is impossible to limit the displacement of each seismic isolator individually. In addition, when eccentricity acts, since the seismic isolator located at the edge of the plane generates a larger displacement, it is necessary to limit the displacement of the individual device.

In addition, when the rigidity of the stationary body is large, a strong impact force caused by the collision between the upper structure and the stationary body may act on the building, causing damage to the building or damage to the equipment installed inside.

In addition, the rubber-based seismic isolator may deteriorate over time due to contact with air, and in this case, the limiting strain rate may decrease due to the curing phenomenon. In this case, it may be necessary to adjust the stop separation distance to prevent damage to the seismic isolator, and there is a problem in that it is difficult to control the stop body of the structure type.

The technology behind the present application is disclosed in Japanese Laid-Open Patent No. 2016-125607.

The present application is to solve the problems of the prior art described above, a stop device for limiting the displacement of the seismic isolator, which can prevent the structure from collapsing due to damage of the seismic isolator due to large displacement of the seismic isolator, It is an object to provide devices and structures.

However, the technical problems to be achieved by the embodiments of the present application are not limited to the technical problems as described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, the stop device for limiting the displacement of the seismic isolator according to one aspect of the present application, the lower end is connected to a region of the lower plate of the seismic isolator, Including a plurality of wires connected to the upper end in one area, wherein the plurality of wires are provided with a length at which a tensile force is applied when a horizontal displacement greater than the design displacement of the seismic isolator occurs between the lower plate and the upper plate. A first wire and a second wire having a length longer than that of the first wire may be included, and when a horizontal displacement occurs in the seismic isolator, a tensile force may be applied to the first wire before the second wire.

The seismic isolator according to an aspect of the present application may include one or more stop devices for limiting the displacement of the seismic isolator according to an aspect of the present application.

In addition, a structure according to an aspect of the present application may include a seismic isolator according to an aspect of the present application.

The above-described problem solving means are merely exemplary and should not be construed as limiting the present application. In addition to the above-described exemplary embodiments, additional embodiments may exist in the drawings and detailed description of the invention.

According to the above-described problem solving means of the present application, when a horizontal displacement greater than the design displacement occurs in the seismic isolator, the first wire is tensilely deformed before the second wire and can absorb at least a portion of the horizontal displacement, and the second wire The seismic isolator can be prevented from being damaged by applying a tensile force before it is damaged. In this process, since the load by the horizontal displacement can be sequentially relieved in a form that is absorbed by the second wire after the load by the horizontal displacement is absorbed by the first wire, a sequential stopping force can be applied, The shock generated when the seismic isolator is stopped (stopping the horizontal displacement) can be alleviated, and accordingly, the protection effect for the upper structure and internal devices can be increased.

1 is a schematic cross-sectional view illustrating a stop device for limiting displacement of a seismic isolator according to an embodiment of the present application.
2 is a schematic conceptual cross-sectional view for explaining a stop device for limiting displacement of the seismic isolator according to an embodiment of the present invention when a horizontal displacement occurs in the seismic isolator.
3 is a graph showing a load-displacement curve of a stopping device (general stopping device) for limiting displacement of a seismic isolator without an eccentric induction prevention wire when a horizontal displacement occurs in the seismic isolator.
Figure 4 is a stop device for limiting the displacement of a seismic isolator without an eccentric induction prevention wire (general stop device) and a stop device for limiting the displacement of a seismic isolator equipped with an eccentric induction prevention wire (eccentric induction prevention stop device). It is a schematic conceptual plan view for explaining the arrangement position.
5 is a graph showing a load-displacement curve of a stop device (stop device for preventing eccentricity) for limiting displacement of a seismic isolator provided with a wire for preventing eccentricity when horizontal displacement occurs in the base isolator.

Hereinafter, exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present application. However, the present application may be implemented in various different forms and is not limited to the embodiments described herein. In addition, in the drawings, parts not related to the description are omitted in order to clearly describe the present application, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is said to be "connected" with another part, this includes not only the case that it is "directly connected", but also the case that it is "electrically connected" with another element interposed therebetween. do.

Throughout this specification, when a member is positioned "on", "upper", "upper", "under", "lower", and "lower" of another member, this means that a member is located on another member. It includes not only the case where they are in contact but also the case where another member exists between the two members.

Throughout the specification of the present application, when a certain part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

The present invention relates to a stop device for limiting the displacement of a seismic isolator.

Hereinafter, a stopping device (hereinafter referred to as'the stopping device') 2 for limiting the displacement of the seismic isolator according to an embodiment of the present application will be described.

1 is a schematic conceptual cross-sectional view illustrating a stop device for limiting displacement of a seismic isolator according to an embodiment of the present application, and FIG. 2 is a seismic isolation according to an embodiment of the present application when a horizontal displacement occurs in the seismic isolator It is a schematic conceptual cross-sectional view for explaining a stop device for limiting the displacement of the device.

1 and 2, the present stopping device 2 is a stopping device for limiting the displacement of the seismic isolating device 1 installed in the structure. As an example, the seismic isolator 1 may include a lower plate 11, an upper plate 12, and a seismic isolating part 13 positioned between the lower plate 1 and the upper plate 12. Also, the upper plate 12 may be fixed to the lower surface of the upper structure of the structure, and the lower plate 11 may be fixed to the upper surface of the lower structure of the structure. In addition, the seismic isolator 13 may be made of an elastic material. The seismic isolator 1 may be for earthquake protection. For example, it may serve to reduce an earthquake load propagating from the ground by lengthening the upper structure.

However, since the seismic isolator 1 exhibits a horizontally flexible behavior, a large displacement may occur during an earthquake, and when a large horizontal displacement occurs, it may shear failure and damage the upper structure. The present stopping device 2 can limit excessive horizontal displacement of the seismic isolating device 1 to prevent such damage.

It will be described in detail below.

Referring to FIG. 1, the stop device 2 has a lower end connected to a region of the lower plate 11 of the seismic isolator 1 and an upper end connected to a region of the upper plate 12 of the seismic isolating device 1 It includes a plurality of wires (21, 22, 23). Here, the term "one area" means an area having a predetermined area, and when the predetermined area is set to be considerably narrow, it may be understood as a point shape. However, since it is difficult for a plurality of wires to be connected to the same point in reality, it is desirable to be understood more broadly as the concept of one area rather than the concept of one point. In addition, the plurality of wires (21, 22, 23) are applied to at least one of the plurality of wires (21, 22, 23) when the horizontal deformation is greater than the design displacement of the seismic isolator (1) in consideration of the height of the seismic isolator (1). Tensile force can be set to act.

More specifically, referring to FIG. 1, when a plurality of wires 21, 22, and 23 have a horizontal displacement greater than the design displacement of the seismic isolator 1 between the lower plate 11 and the upper plate 12, It includes a first wire 21 provided with a length to which the tensile force is applied, and a second wire 22 having a length longer than that of the first wire 21.

Accordingly, in FIGS. 2 and 3 (for reference, in the graph of FIG. 3, the tension by the first wire 21 is shown as secondary tension, and the tension by the second wire 22 is shown as tertiary tension. When a horizontal displacement occurs in the seismic isolator 1, a tensile force is applied to the first wire 21 rather than the second wire 22. Therefore, when a horizontal displacement greater than the design displacement occurs in the seismic isolator 1, the first wire 21 is tensioned by absorbing the horizontal displacement before the second wire 22, and the impact can be alleviated, and the second The horizontal displacement weakened by the first wire 21 may be transmitted to the wire 22.

In addition, the first wire 21 may be provided with a tensile member having higher ductility and lower strength than the second wire 22. In addition, the second wire 22 may be provided with a length in which a tensile force is applied at a horizontal displacement smaller than the horizontal limit displacement (horizontal fracture displacement) of the seismic isolator 1. Accordingly, when a horizontal displacement greater than the design displacement occurs in the seismic isolator 1, the first wire 21 is tensilely deformed before the second wire 22 and can absorb at least a portion of the horizontal displacement, and the second The wire 22 may prevent the seismic isolator 1 from being damaged by applying a tensile force before the seismic isolator 1 is damaged. In this process, the ductility of the first wire 21 is better than that of the second wire 22, and the load due to horizontal displacement is absorbed by the first wire 21 and then absorbed by the second wire 22. Since the seismic isolator 1 is stopped (stopping the horizontal displacement), the shock generated when the seismic isolator 1 is stopped can be alleviated, and accordingly, the upper structure and the The protection effect for internal devices can be increased.

Accordingly, when the second wire 22 is stretched after the first wire 21 is stretched due to the occurrence of horizontal displacement with respect to the seismic isolator 1, the second wire 22 is pulled by the first wire 21 In the case where the first wire 21 is not installed, a reduced tensile force may be applied.

In addition, the second wire 22 is preferably provided with ductility and strength to limit the occurrence of a displacement greater than the horizontal limit displacement in the seismic isolator 1. For example, there may be an earthquake load considered depending on the area in which the structure is to be constructed, and the second wire 22 is a seismic isolator (1) without being cut off or removed from the seismic isolating device (1) for the considered earthquake load. It may be provided with ductility and strength that can prevent the occurrence of a displacement greater than the horizontal limit displacement.

The wires applied to the first wire 21, the second wire 22, and the like may be a wire having a material or structure corresponding to a previously developed wire or a wire to be developed in the future, which is obvious to a person skilled in the art.

3 is a graph showing a load-displacement curve of a stopping device (general stopping device) for limiting displacement of a seismic isolator without an eccentric induction prevention wire when a horizontal displacement occurs in the seismic isolator.

According to the above, the present stopping device 2 without the eccentric induction prevention wire 23 may be referred to as a general stopping device. Referring to FIG. 3, this stopping device 2 is a general stopping device, In the case of including two wires (21, 22), the load-displacement curve of the stopping device (2) when horizontal displacement occurs is two tensile curves, specifically, the second tensile curve by the first wire (21) And a third tensile curve by the second wire 22. At this time, the stopping device 2 controls the first wire 21 to have low rigidity, and the second wire 22 to have high rigidity so that no horizontal displacement greater than the seismic isolator breakdown displacement (horizontal breakdown displacement) occurs. can do.

Figure 4 is a stop device for limiting the displacement of a seismic isolator without an eccentric induction prevention wire (general stop device) and a stop device for limiting the displacement of a seismic isolator equipped with an eccentric induction prevention wire (eccentric induction prevention stop device). It is a schematic conceptual plan view for explaining the arrangement position, and FIG. 5 is a load of a stopping device (stopping device for preventing eccentricity) for limiting displacement of a seismic isolator equipped with a wire for preventing eccentricity when horizontal displacement occurs in the seismic isolator- It is a graph showing the displacement curve.

A plurality of seismic isolators 1 may be installed in the structure, and the eccentricity inducing seismic isolator 1 in which displacement of more than a preset displacement occurs before the other seismic isolators 1 due to eccentricity among the plurality of seismic isolators 1 In this case, referring to FIGS. 1 and 2, the plurality of wires 21, 22, and 23 may include a wire 23 for preventing eccentricity. For example, the eccentric induction seismic isolator 1 may be a seismic isolator 1 disposed at a position spaced apart from the center of the structure by a predetermined distance or more. As the distance from the center of the structure increases, the eccentricity acting on the seismic isolator 1 may increase, and the possibility of additional displacement may increase due to the eccentricity. For example, in Fig. 4 (for reference, in Fig. 4, the seismic isolator 1 enclosed in a dotted line may mean an eccentric induction seismic isolator 1, and the other seismic isolator 1 is a general seismic isolator 1) In general, in the design of a seismic isolating structure, the seismic isolating system generally allows 5% eccentricity. In this case, the seismic isolating device 1 located at the edge of the structure An additional displacement of about 20% may occur than that of the seismic isolator 1. In this way, the plurality of wires 21, 22, and 23 of the eccentric induction seismic isolator 1 in which additional displacement due to eccentricity occurs may include the eccentric induction prevention wire 23. Accordingly, referring to FIG. 4, in the case of a structure having a square base mat, the main stop device 2 provided in the seismic isolator 1 located at the edge side (especially, for example, the vertex side) The separation distance of the seismic isolator 1 by the eccentric induction prevention wire 23 having an initial tensile force compared to the first and second wires 21 and 22 (the seismic isolator 1 limited by the eccentric induction prevention wire 23) The separation distance (relative displacement of the upper plate 12 in the horizontal direction with respect to the lower plate 11 or the relative displacement of the lower plate 11 in the horizontal direction with respect to the upper plate 12) of the first and second By making it shorter than the separation distance of the seismic isolator 1 by the wires 21 and 22, it is possible to respond to the rotational force caused by eccentricity. For reference, the seismic isolator 1 by each of the plurality of wires 21, 22, 23 ) Of the separation distance may be determined (adjusted) according to the length setting of each of the plurality of wires (21, 22, 23).

Accordingly, referring to FIGS. 1 and 2 together, the eccentric induction prevention wire 23 may have a horizontal displacement greater than the design displacement of the seismic isolator 1 between the lower plate 11 and the upper plate 12. When provided with a length to which the tensile force is applied, but provided with a length shorter than the length of the first wire 21, the second wire 22 may be provided with a tensile member having higher ductility and lower strength.

Therefore, FIG. 5 (for reference, in the graph of FIG. 5, the tension by the wire 23 for preventing eccentricity is the primary tension, the tension by the first wire 21 is the secondary tension, and the second wire 22 Referring to the tension is shown as the third tension), when a horizontal displacement larger than the design displacement of the seismic isolator 1 occurs, the eccentric induction prevention wire 23 is first tensioned and the horizontal displacement (seismic isolator 1 ), the horizontal displacement caused by eccentricity) can be suppressed, and after that, the first wire 21 is secondarily tensioned and the horizontal displacement can be suppressed, and then, the second wire 22 is third It is tensioned and can suppress horizontal displacement.

This stop device 2 provided in the eccentric induction seismic isolator 1 may also be referred to as an eccentric induction prevention stop device. Referring to FIG. 5, this stop device 2 includes three wires 21, 22, and 23 ), the load-displacement curve can have a 1st, 2nd, 3rd tensile curve. At this time, the stop device 2 has the eccentric induction prevention wire 23 and the first wire 21 to have low stiffness, and the second wire 22 has a high stiffness, so that the seismic isolator breakdown displacement (horizontal breakdown displacement) It can be controlled so that no abnormal horizontal displacement occurs.

In addition, the eccentric induction prevention wire 23 considers the relaxation of the impact generated during the tensile action due to the occurrence of the horizontal displacement of the seismic isolator 1, and reduces some of the applied tensile force to ductility and strength that can be reduced through tensile deformation. It can be provided. Accordingly, when the horizontal displacement of the knitting device 1 occurs, the eccentric induction prevention wire 23 may first act on a tensile force, the first wire 21 may secondarily act on a tensile force, and the second wire 22 Since the can act as a tensile force in the third order, as described above, the eccentric induction prevention wire 23, the first wire 21 and the second wire 22 can sequentially act on the tensile force, thereby reducing the impact of horizontal displacement It can absorb horizontal displacement.

On the other hand, the first wire 21 and the second wire 22 are tensioned in response to the magnitude of the horizontal displacement generated in the seismic isolator 1, but may be a tension member providing isotropy that is not dependent on the direction of the horizontal displacement. . In other words, the first wire 21 and the second wire 22 can be freely deformed according to the direction and size of horizontal displacement except for the upper and lower ends fixed to the lower plate 11 and the upper plate 12, respectively. Do. In addition, the eccentric induction prevention wire 23 may be a tension member that is tensioned in response to the magnitude of the horizontal displacement generated in the seismic isolator 1, but provides isotropy that is not dependent on the direction of the horizontal displacement. As described above, the stop device 2 sets the eccentric induction prevention wire 23, the first wire 21, and the second wire 23 to be a tension member that provides isotropy, which absorbs horizontal displacement, so that the conventional wall stop It is possible to solve the difference in separation distance for each direction of the sieve.

In addition, when the seismic isolator 1 corresponds to a seismic isolating device in which the horizontal limit displacement (horizontal fracture displacement) decreases over time, each of the first wire 21 and the second wire 22 is a seismic isolator ( When 1) is manufactured, it may be replaced with a wire having a length adjusted in response to the horizontal limit displacement value, which is confirmed through a performance test of one or more extra seismic isolators manufactured as extra.

For example, in a rubber-based seismic isolator, a horizontal limit displacement may decrease over time due to a hardening phenomenon caused by deterioration. Also, as the horizontal limit displacement becomes smaller, the length of the plurality of wires 21, 22, 23 may be adjusted (the length may need to be reduced). Therefore, in the case of a seismic isolating device that has elapsed for a long time, the horizontal limit displacement can be confirmed by an appropriate evaluation method (ex. the same seismic isolator is manufactured in excess during construction and a performance test is performed one by one regularly). (2) may be provided so that at least one of the plurality of wires 21, 22, 23 can be replaced with a wire having a length corresponding to the horizontal limit displacement value of the seismic isolator 1.

1 and 2, the stop device 2 is detachably installed (installed and removed) in one area of the lower plate 11, and the lower ends of the plurality of wires 21, 22, 23 are connected. The upper fastening type lower wire fastening device 25 which is detachably installed in one area of the lower fastening type wire fastening device 24 and the upper plate 12, and to which the upper ends of the plurality of wires 21, 22, 23 are connected. ) Can be included. In other words, the upper and lower wire fixing devices 24 and 25 are provided so that one or more of the plurality of wires 21, 22 and 23 or the stop device 2 can be replaced without replacing the seismic isolating device 1, Alternatively, the seismic isolator 2 may be provided to enable replacement of one or more of the plurality of wires 21, 22, 23 or the main stop device 2 in an individual form for each of the seismic isolating devices 2, and accordingly, the seismic isolating device 1 It can be possible to independently replace this stop device (2) without replacement.

In addition, since a plurality of wires (21, 22, 23) can be replaced, the separation distance of the stop device (2) can be adjusted through the replacement of one or more of the plurality of wires (21, 22, 23).

In addition, for reference, one or more of the stopping devices 2 may be provided in the seismic isolating device 1. However, it is preferable that four or more of the stopping devices 2 are installed with respect to the seismic isolating device 1 so as to improve stability. In addition, when a plurality of pieces are installed, the stopping device 2 may be installed at intervals (a certain interval).

In summary, the present stopping device can solve the difference in separation distance for each direction, which is a problem of the conventional wall-type stop by using a wire. Since it is difficult to install a conventional wall stopper in a circular shape, the separation distance may vary depending on the direction, and in some cases, a direction in which a separation distance greater than the limit displacement of the seismic isolator may occur. On the other hand, this stop device can solve this because it is isotropic of a wire method.

Specifically, since the wall stopper is difficult to be installed in a circular shape, the separation distance of the wall stopper varies depending on the direction, and there may be a direction in which a separation distance greater than the limit displacement of the seismic isolator occurs in some cases. On the other hand, according to the present stopping device, since a tension member providing isotropy that is not dependent on the direction of horizontal displacement is applied as the wires 21, 22, 23, at least one of the plurality of wires 21, 22, 23 is horizontal. Since it is freely deformed according to the direction and magnitude of the displacement and can absorb the horizontal displacement, the problem of difference in separation distance for each direction can be solved. In addition, according to the present stop device, since a plurality of wires (21, 22, 23) can be replaced, a plurality of wires (21, 22, 23) through length adjustment of each of the plurality of wires (21, 22, 23) The separation distance of the seismic isolator 1 can be adjusted, and in the case of the eccentric induction prevention stop device 1, at least one of a plurality of wires 21, 22, 23 (for example, an eccentric induction prevention wire ( By reducing the separation distance of the seismic isolator 1 by 23)), eccentricity can be prevented in response to rotational force caused by eccentricity.

In addition, according to the above, this stopping device can control the load stage generated during stop by using several wires with different separation distances (or lengths of each) of the stopping device 1 by each. It can alleviate the city impact. Specifically, in the present stopping device, the number of wires may be two or three. In addition, the present stopping device sets the length of the plurality of wires 21, 22, 23 so that tensile force is generated on each of the plurality of wires 21, 22, 23 at an appropriate separation distance of the seismic isolator 1 A sequential stopping force by the first and second wires 21 and 22 or a sequential stopping force by the wire 23, the first wire 21 and the second wire 22 to prevent eccentricity can be applied. .

In addition, according to the present stop device, the eccentric induction prevention wire 23 can be installed in the eccentric induction seismic isolator 1 in which excessive displacement occurs before other seismic isolators due to eccentricity, and a tensile force can be applied primarily. In addition, in the present stopping device, the first wire 21 is a tension member having high ductility and low strength, and can play a role of mitigating an impact before a strong impact force occurs when the seismic isolator 1 is stopped (soft stop). ), in the case of the general seismic isolator 1, the first wire 21 may act primarily with a tensile force, and in the case of the eccentric induction seismic isolator 1, the tensile force may act secondly. In addition, in the present stopping device, the second wire 22 may be a tensile member having low ductility and high strength, and by allowing the seismic isolator 1 to be stopped, it is possible to prevent the seismic isolator 1 from being damaged. , In the case of the general seismic isolator 1, the second wire 22 may have a secondary tensile force, and in the case of the eccentric induction seismic isolator 1, the tensile force may act thirdly.

In addition, this stopping device can protect the upper structure and internal devices by mitigating the impact when stopping by using a material having good ductility as the first wire 21 or the eccentric induction prevention wire 23 that generates the initial tensile force. .

In addition, according to the above, the separation distance of the seismic isolator 1 may be adjusted by adjusting the length of one or more of the plurality of wires 21, 22, and 23 of the stopping device 2.

In addition, according to the above, since the separation distance of each of the seismic isolator 1 can be adjusted to adjust the length of one or more of the plurality of wires 21, 22, 23 of the stopping device 2, the stopping device 2 ) Can be effective for eccentric control.

As described above, the present stopping device 2 may be referred to as a wire-type individual stopping device for limiting the excessive displacement of the seismic isolating device 1.

In addition, this stopping device (2) can be applied as a stopping device to prevent the structure from collapsing due to damage due to large displacement of the base isolator when installing a seismic isolator for earthquake protection for important structures including nuclear power plants. There will be.

In addition, the present application may provide a seismic isolator according to an embodiment of the present application including at least one stop device 2 for limiting the displacement of the seismic isolator according to the exemplary embodiment of the present application described above.

In addition, the present application may provide a structure in which one or more seismic isolating devices according to the exemplary embodiment of the present disclosure are installed.

The foregoing description of the present application is for illustrative purposes only, and those of ordinary skill in the art to which the present application pertains will be able to understand that it is possible to easily transform it into other specific forms without changing the technical spirit or essential features of the present application. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present application is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present application.

1: seismic isolator
11: lower plate
12: upper plate
13: seismic isolation
2: stop device
21: first wire
22: second wire
23: Eccentricity prevention wire
24: lower fastening type wire fixing device
25: upper fastening type wire fixing device

Claims (12)

In the stopping device for limiting the displacement of the seismic isolator installed in the structure,
A plurality of wires having a lower end connected to a region of the lower plate of the seismic isolator and an upper end connected to a region of the upper plate of the seismic isolating device,
The plurality of wires include a first wire having a length at which a tensile force is applied when a horizontal displacement greater than the design displacement of the seismic isolator occurs between the lower plate and the upper plate, and a first wire having a length longer than that of the first wire. Contains 2 wires,
When a horizontal displacement occurs in the seismic isolator, a tensile force is applied to the first wire before the second wire. The method of claim 1,
The first wire is provided with a tensile member having higher ductility and lower strength than the second wire,
The second wire is provided with a length at which a tensile force is applied at a horizontal displacement smaller than the horizontal limit displacement of the seismic isolator. The method of claim 2,
The first wire is provided with ductility and strength capable of reducing a part of the applied tensile force through tensile deformation in consideration of the relaxation of the impact generated during the tensile action due to the occurrence of horizontal displacement of the seismic isolator,
When the second wire is stretched after the first wire is stretched due to the occurrence of horizontal displacement of the seismic isolator, the tensile force is reduced by the first wire and the second wire compared to a case where the first wire is not installed. A stop device for limiting the displacement of the seismic isolating device. The method of claim 3,
The second wire is provided with ductility and strength to limit the occurrence of a displacement greater than the horizontal limit displacement in the seismic isolator. The method of claim 1,
A plurality of seismic isolators are installed in the structure,
In the case of an eccentric induction seismic isolator in which a displacement of more than a preset displacement occurs before other seismic isolating devices by an eccentricity among a plurality of seismic isolating devices, the plurality of wires include an eccentric induction prevention wire,
The eccentric induction prevention wire is provided with a length to which a tensile force is applied when a horizontal displacement greater than the design displacement of the seismic isolator occurs between the lower plate and the upper plate, and has a length shorter than the length of the first wire. , The stop device for limiting the displacement of the seismic isolator is provided with a tension member having a higher ductility and lower strength than the second wire. The method of claim 5,
The eccentric induction prevention wire is provided with ductility and strength capable of reducing a part of the applied tensile force through tensile deformation in consideration of the relaxation of the impact generated during the tensile action due to the occurrence of horizontal displacement of the seismic isolator. Stop device to limit the displacement of the device. The method of claim 5,
The eccentric induction seismic isolator is a seismic isolator disposed at a position spaced apart from the center of the structure by a predetermined distance or more. The method of claim 1,
The first wire and the second wire are tension members which are tensioned in response to the magnitude of the horizontal displacement generated in the seismic isolator, but provide isotropy that is not dependent on the direction of the horizontal displacement. Stop device. The method of claim 1,
When the seismic isolating device corresponds to a seismic isolating device whose horizontal limit displacement decreases over time, each of the first wire and the second wire is included in one or more extra seismic isolating devices manufactured as extra when the base isolating device is manufactured. A stop device for limiting displacement of a seismic isolator, which is to be replaced with a wire having a length adjusted in response to a horizontal limit displacement value that is confirmed through a performance test. The method of claim 1,
A lower fastening type wire fixing device detachably installed in a region of the lower plate and connecting lower ends of the plurality of wires; And
A stop device for limiting displacement of the seismic isolator, further comprising an upper fastening type lower wire fixing device detachably installed in one area of the upper plate and connected to the upper ends of the plurality of wires. A seismic isolator comprising at least one stop device for limiting the displacement of the seismic isolator according to claim 1. A structure in which at least one seismic isolator according to claim 11 is installed.

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