KR102432679B1 - Seismic isolator with reinforced vertical damping - Google Patents

Abstract

A vertical damping reinforcement type seismic isolator is disclosed. A vertical damping reinforcement type seismic isolator according to the present invention comprises: a lower plate installed at an upper end of a lower structure; an upper plate installed at the lower end of the upper structure while being spaced apart from the lower plate; a horizontal damping part of an elastic material installed on the lower plate and elastically deformed left and right according to the horizontal vibration transmitted from the upper and lower structures to damp the vibration; A cylinder provided between the upper plate and the horizontal damping unit, and an operating member coupled to the upper plate to linearly move while forming viscous resistance with the fluid in the cylinder according to the vibration in the vertical direction transmitted from the upper and lower structures a first vertical damping unit for damping vibration; and a protective cover provided to surround the lower plate, the upper plate, the horizontal damping part, and the first vertical damping part. According to the present invention, vibrations in the horizontal direction transmitted from the upper and lower structures are primarily buffered or damped, and a viscous resistance with the fluid inside the cylinder is formed and the first vertical damping part of the operating member installed to move linearly in the vertical direction The vibration of the horizontal damping unit is independent of the damping operation of the horizontal damping part and is supplemented by different materials and methods, and as it is buffered or damped secondarily, the damping performance for three-dimensional vibration in the horizontal and vertical directions can be improved and the stability of the structure can be promoted. .

Description

SEISMIC ISOLATOR WITH REINFORCED VERTICAL DAMPING

The present invention relates to a vertical damping reinforcement type seismic isolator, and more particularly, to a seismic isolator capable of three-dimensionally attenuating vibrations in the vertical direction as well as horizontal vibrations.

Recently, due to the increasing trend of seismic activity and the increase in natural disasters caused by global climate change and the increase in uncertainty about these, the introduction of safety facilities or facilities above a certain level for structures is increasingly strictly required in recent structural construction. have.

Despite this trend, until recently, due to the old perception that Korea is a safe country from earthquakes among various natural phenomena, active investment and encouragement for R&D such as structure optimization design and collapse prevention were not sufficiently made. Currently, most of the domestic structures and facilities are in a situation where they are more vulnerable to unpredictable natural disasters such as earthquakes and typhoons.

However, as the construction of large structures such as high-rise buildings and long bridges has become more common and increased compared to the past, the structure itself directly absorbs vibration energy in order to secure the safety of the structure from external loads (earthquakes, typhoons). An earthquake-resistant design has been developed and applied.

In addition, research and development on various vibration damping or isolating devices capable of dissipating the vibration energy flowing into the structure are being actively conducted.

For example, in the case of a bridge, the seismic isolation system (lead seismic isolation bearing) disclosed in Korean Patent Registration No. 10-1007694 (registration date: January 05, 2011) is installed between the upper plate and the pier constituting the bridge, so that the pier However, it effectively prevents damage to the bridge from vibration energy transmitted to the upper plate.

However, the seismic isolation system disclosed in Republic of Korea Patent No. 10-1007694 (registration date: January 05, 2011) attenuates the vibration through the deformation of the elastic body 30 in the central part inclined to the left and right in response to the horizontal vibration. However, on the other hand, there is a problem of slightly sinking the structure down, and there is a problem that sufficient vibration damping for vertical vibration is not achieved due to the limitation by the metal plate 32 .

Therefore, there is a need for structural improvement of the existing seismic isolation system that causes various problems as described above.

Republic of Korea Patent No. 10-1007694 (Registration Date: January 05, 2011)

An object of the present invention is to provide a vertical damping reinforced seismic isolator capable of three-dimensionally and overlappingly buffering or damping by supplementing and distinguishing horizontal and vertical vibrations transmitted between structures with different materials and damping methods. will do

The object is, the lower plate is installed on the upper end of the lower structure; an upper plate installed at the lower end of the upper structure while being spaced apart from the lower plate; a horizontal damping part of an elastic material installed on the lower plate and elastically deformed left and right according to the horizontal vibration transmitted from the upper and lower structures to damp the vibration; A cylinder provided between the upper plate and the horizontal damping unit, and an operating member coupled to the upper plate to linearly move while forming viscous resistance with the fluid in the cylinder according to the vibration in the vertical direction transmitted from the upper and lower structures. a first vertical damping unit for damping vibration; and a protective cover provided to surround the lower plate, the upper plate, the horizontal damping part, and the first vertical damping part.

The cylinder has a housing shape for storing the fluid in a sealed state in a pressurized space formed therein, and the operation member includes: an operation rod coupled to the upper plate; an actuating head formed at an end of the actuating rod to linearly move the pressure space up and down according to vibration in a vertical direction; and a plurality of through-holes formed in the operation head so that the operation head forms a viscous resistance with the fluid.

In an area of the protective cover corresponding to the operating range of the first vertical attenuation unit, a wrinkle portion having a bellows structure may be formed to guide the smooth operation of the first vertical attenuation unit.

The fluid may be made of air or oil, and the oil may further include a phase change material whose state is changed in a specified phase change temperature range so that the damping ability of the first vertical damping unit varies with temperature. have.

The horizontal damping part is installed on the lower plate by being integrally laminated with an elastic plate and a metal plate, and between the upper plate and the horizontal damping part, up and down according to the vibration in the vertical direction transmitted from the upper and lower structures. and a second vertical damping unit for overlappingly damping vibrations may be interposed.

In the central portion of the horizontal damping part, a lead block that is deformed in shape according to the vibration in the horizontal direction transmitted from the upper and lower structures and supplements the damping ability of the horizontal damping part may penetrate and be installed.

In the inner space surrounded by the protective cover, a lubricating material that facilitates the operation of the horizontal damping part and the first vertical damping part, and a phase change material that makes a variable damping operation according to a temperature change are mixed and filled with each other. have.

According to the present invention, due to the horizontal damping part of the elastic material installed on the lower plate spaced apart from the upper plate, the vibration in the horizontal direction transmitted from the upper and lower structures is primarily buffered or damped, and viscous resistance is formed with the fluid inside the cylinder. And the vibration in the vertical direction is independent of the damping operation of the horizontal damping part through the first vertical damping part including an operation member installed to move linearly and is supplemented by different materials and methods, and the upper part supported during left and right vibrations as secondary buffering or damping The problem of the structure sinking downward can be effectively solved, and the stability of the structure can be improved due to the improvement of the damping performance for three-dimensional vibrations in the horizontal and vertical directions.

1 is a perspective view of a vertical damping reinforcement type seismic isolator according to an embodiment of the present invention.
FIG. 2 is an exploded view of FIG. 1 ;
3 is a partial cross-sectional view of a portion of FIG. 1 ;
FIG. 4 is an operation state diagram showing a state in which the seismic isolator of FIG. 1 moves left and right according to vibration in the horizontal direction.
5 and 6 are operational state diagrams respectively showing a state in which the vibration isolator of FIG. 1 moves up and down or tilts according to vibration in the vertical direction.
7 is a front view showing the bridge structure in which the seismic isolator of FIG. 1 is installed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted in order to clarify the gist of the present invention.

1 is a perspective view of a vertical damping reinforced seismic isolator according to an embodiment of the present invention, FIG. 2 is an exploded view of FIG. 1 , FIG. 3 is a partial cross-sectional view of FIG. 1 , and FIG. 4 is the seismic isolator of FIG. It is an operation state diagram showing the state in which the device moves left and right according to the vibration in the horizontal direction, respectively, and FIGS. 5 and 6 are operation state diagrams respectively showing the state in which the vibration isolator of FIG. 1 moves up and down or inclines according to the vibration in the vertical direction. and FIG. 7 is a front view showing the bridge structure in which the seismic isolator of FIG. 1 is installed.

Top (top), bottom (bottom), left and right (side or side), front (front, front), rear (back, back), etc., which refer to directions in the description and claims of the invention, etc. are not used for limiting rights. For convenience of explanation, it is determined based on the relative positions between the drawings and the configuration, and the three axes may be rotated to correspond to each other and changed, except where specifically limited otherwise.

In the vertical damping reinforcement type seismic isolator 100 according to the present invention, in addition to the horizontal vibration (HF) transmitted to a structure that is shaken by an external force (earthquake, typhoon) generated from the outside, the vibration in the vertical direction (VF) ) is an invention devised to buffer or dampen each other independently and in different materials and methods, thereby improving the damping performance for three-dimensional vibrations compared to the prior art.

In order to implement the above-described functions or actions in detail, the vertical damping reinforcement type seismic isolator 100 according to the embodiment of the present invention includes a lower plate 110, an upper plate ( 120), the horizontal attenuation unit 130, the first vertical attenuation unit 140, the protective cover 150, the second vertical attenuation unit 160, and may be configured to include a lead block 170, and the like.

Hereinafter, each of the above-mentioned components will be described in detail.

First, the lower plate 110 and the upper plate 120, the three-dimensional vibration (HF, VF) transmitted from the lower structure 30 or the upper structure 20, a horizontal damping unit 130 or first and second vertical damping to be described later As a plate-shaped component provided to completely transmit to the damping means such as the parts 140 and 160, as shown in FIGS. 4 to 6, the lower structure 30 and the upper structure 20 are spaced apart from each other, respectively. It may be combined or installed to form an integral body.

Although not specifically shown, the lower plate 110 and the upper plate 120 are made of a solid metal plate 134 with a flange extended to the outside, and a plurality of anchor bolts or bolts/nuts passing through the flange by fastening means such as bolts/nuts. Each may be firmly coupled to the upper end of the lower structure 30 and the lower end of the upper structure (20).

In the present invention, the vibrations (HF, VF) transmitted through the lower plate 110 and the upper plate 120 are derived from the lower structure 30 and the upper structure 20, but due to these vibrations (HF, VF) Since the lower plate 110 and the upper plate 120 are spaced up and down or staggered left and right are relative to each other, whether the source of the vibrations (HF, VF) is the lower structure 30 or the upper structure 20 is not specifically distinguished. do.

The horizontal damping unit 130 is a component made of an elastic material that is elastically deformed left and right according to the vibration (HF) in the horizontal direction transmitted from the upper and lower structures 20 and 30 and attenuates the vibration, and the lower plate 110 . It is installed to be integrated with the lower plate 110 to receive the vibrations (HF, VF) of the lower structure 30 .

The horizontal damping unit 130 is compressible up and down, and elastic deformation in which the upper and lower surfaces move relative to the left and right, respectively, is possible. Polyurethane, a thermoplastic polymer compound with a urethane bond that can be restored with

Here, since polyurethane can easily implement a wide range of elasticity and has excellent durability through a change in strength according to the composition of the polymer compound and the content of additives, etc., the seismic isolator 100 according to the present invention has various properties and elasticity. By appropriately selecting or replacing the individually manufactured polyurethane block, it is possible to variously vary the restoration ability and vibration damping ability of the horizontal damping unit 130 as needed.

However, the horizontal damping unit 130 according to the embodiment of the present invention is dedicated to the damping function for the horizontal vibration (HF) rather than the vertical direction vibration (VF), as shown in Figs. Likewise, the elastic plates 132 and the metal plates 134 arranged in the upper and lower positions are alternately stacked and manufactured in an integrated form.

Here, the integration between the elastic plate 132 and the metal plate 134 is made by mutually bonding by an adhesive material such as epoxy or the like, or a bolt passing through the laminated elastic plate 132 and the metal plate 134 and pressing and fixing them. / It can be made by fastening means, such as a nut or wire.

On the other hand, the reason why the metal plate 134 is interposed between the elastic plates 132 instead of only the elastic plate 132 is that the elastic deformation of the elastic plate 132 in the vertical direction is supported by the metal plate 134 . In order to accurately guide the direction of deformation so that each elastic plate 132 is relatively tensioned with respect to the metal plate 134 with respect to the horizontal component vibration (HF) and elastically deformed (TD) and restored. to be.

The elastic plate 132 according to the embodiment of the present invention can be manufactured in a plate shape using polyurethane, which is a thermoplastic polymer compound having a urethane bond, as a material, as described above, and is individually manufactured with various properties and elasticity. By appropriately selecting or combining the plates, it is possible to variously vary the restoring ability and vibration damping ability of the horizontal damping unit 130 as needed.

Due to the stacked structure of the elastic plate 132 and the metal plate 134 , the horizontal component vibration HF among the vibrations HF and VF transmitted from the upper and lower structures 20 and 30 is shown in FIG. 4 . As shown, the horizontal attenuation unit 130 and the protective cover 150 are primarily attenuated through itself, and the vibration (VF) of the remaining vertical components is the first, to be described later, as shown in FIGS. 5 and 6 , 2 The vertical attenuation unit 140, 160, the protective cover 150 itself and the lead block 170, etc. are dispersed and sequentially or overlappingly buffered or attenuated, so that the damping process for vibrations (HF, VF) is efficient and overlapping. can be done

As described above, the horizontal damping unit 130 installed on the lower plate 110 is accommodated in the seismic isolator 100 by the protective cover 150 provided to surround the lower plate 110 and the upper plate 120 . By blocking the contact with the outside air, it is possible to reduce the deformation or deterioration of the elastic material (elastic plate 132 or polyurethane block) due to the external environment.

The protective cover 150 is made of an elastic material so that it can be deformed together according to the deformation (TD, CD) of the above-described horizontal damping part 130 or the first and second vertical damping parts 140 and 160 to be described later, It may be firmly coupled to the lower plate 110 , the upper plate 120 , and the horizontal damping unit 130 by a predetermined fastening means such as a bolt or an adhesive material.

On the other hand, in the protective cover 150 as described above, the wrinkle part 152 of the bellows structure may be formed along the area corresponding to the operating range of the first vertical damping part 140 to be described later, which is a first vertical This is to guide the smooth operation of the damping unit 140 .

The first vertical damping unit 140 is a component that linearly moves up and down in response to the vibration (VF) in the vertical direction transmitted from the upper and lower structures 20 and 30 and attenuates the vibration, and It may be formed of a damper structure using a viscous resistor (VR).

In order to specifically implement the damper structure as described above, the first vertical damping unit 140 according to an embodiment of the present invention, as shown in FIGS. 2 and 3 , a cylinder 142 and an operating member 144 ) and the like.

Here, the cylinder 142 is a housing-shaped component that stores the fluid F in a sealed state in the pressurized space formed therein, and may be provided between the upper plate 120 and the horizontal damping unit 130 .

The fluid F filled in the cylinder 142 according to the embodiment of the present invention may be made of air or oil. In particular, in the case of oil, pure silicone oil may be used, and a phase change material is contained in a certain ratio of pure silicone oil. can be mixed with

At this time, the phase change material is a material whose state is changed (solid ↔ liquid) in a specified phase change temperature range. When mixed with oil as above, the viscosity resistance (VR) of the oil is the specified phase change temperature range in which the phase change material is liquefied. is small, and increases at a low temperature (a temperature lower than a specific phase change temperature range) at which the phase change material is solidified, thereby increasing the damping ability of the first vertical damping unit 140 .

Such a phase change material may be selected according to the damping ability of the first vertical damping unit 140 required for design, the surrounding environment in which the vibration isolator 100 is installed, etc. For example, a paraffinic material having a phase change temperature range of room temperature. It may be wax or an organic alkane having a phase change temperature range of about 0°C.

Of course, the phase change temperature range of the phase change material can be changed by mixing various types of phase change materials in various ratios, and accordingly, the damping operation is based on the viscous resistance (VR) of the fluid F containing the phase change material. 1 The vertical damping unit 140 is able to exhibit variously variable damping ability according to the temperature.

The operation member 144 forms a viscous resistance VR with the fluid F inside the cylinder 142 described above according to the vibration VF in the vertical direction transmitted from the upper and lower structures 20 and 30, and is linear As a component for damping the vibration VF by moving, it may include an operation rod 144a, an operation head 144b, and a through hole 144c.

At this time, the operation rod 144a is a bar-shaped component that passes through the above-described cylinder 142 in a closed state and connects the upper plate and the operation head 144b to be described later.

And the operation head (144b) is formed at the end of the operation rod (144a) is a plate-shaped component that linearly moves the pressure space of the cylinder 142 up and down according to the vibrations (HF, VF) in the vertical direction.

And the through hole 144c is a component that is formed through a plurality of the operation head 144b so that the operation head 144b forms a fluid F and a viscous resistance VR, and the number, arrangement and size of the diameter are changed. Then, the damping ability of the first vertical damping unit 140 may be variously varied.

At this time, the viscous resistance VR between the operation head 144b and the fluid F is, as shown in FIGS. It is generated by flowing in and out of the pressurized space partitioned by the operation head 144b through the through-hole 144c of the operation head 144b moving up and down, respectively.

The second vertical damping part 160 is interposed between the upper plate 120 and the horizontal damping part 130 and is vertically deformed according to the vibration (VF) in the vertical direction transmitted from the upper and lower structures 20 and 30 ( CD, TD) and vibration damping components, it may be a coil or spiral spring made of metal or synthetic resin that can be compressed and restored smoothly.

However, the second vertical attenuation unit 160 according to an embodiment of the present invention is made of a superelastic shape memory alloy as a material, and as shown in FIGS. 4 to 6 , the first vertical attenuation is formed in the center space of the coil shape. In a state in which the portion 140 is positioned, the lower end supports the horizontal damping unit 130 and the upper end supports the lower surface of the upper plate 120 .

Here, superelasticity shape memory alloy (superelasticity shape memory alloy, 超彈性 形狀記憶合金) is an alloy material manufactured to restore to its original shape at room temperature even if heat is not applied after plastic deformation is applied, and the practice of the present invention In the example, the second vertical damping unit 160 is manufactured as a coil-shaped spring using a nitinol alloy in order to minimize residual deformation due to external force and to restore original shape smoothly in an operating environment at room temperature.

As described above, the second vertical damping unit 160 responds to the selection of the material of the superelastic shape memory alloy, the change of the heat treatment method, the installation place or use to which the present invention is applied, the expected load applied to the structure, etc. By varying the thickness of the helix of the second vertical damping unit 160 or changing the number of turns of the helix, the restoration ability and the damping ability for the vertical vibration (VF) are abundantly and diversely adjusted compared to the conventional seismic isolator. and may be limited.

On the other hand, the second vertical damping unit 160, as shown in (b) of FIG. 5, moves downward of the lower plate 110 or the upper plate 120 without play between the upper plate 120 and the horizontal damping part 130. ) may be installed in a pre-compression-deformed state between the upper plate 120 and the horizontal damping part 130 in order to immediately respond to and buffer the vibration (VF) in the vertical direction such as upward movement of the upper plate 120 .

As described above, the second vertical attenuation unit 160 and the first vertical attenuation unit 140 are respectively implemented in materials and operating methods having different attenuation capabilities, and are horizontal attenuation units that attenuate vibration (HF) in the horizontal direction. (130) is linked to each other, but because each operates independently, it is possible to effectively perform a mutually complementary and overlapping damping operation with respect to the vertical vibration (VF).

Accordingly, the seismic isolator 100 according to the present invention to which the first and second vertical damping units 140 and 160 are applied is capable of buffering or damping the three-dimensional vibrations (HF, VF) in the vertical direction more efficiently than the conventional seismic isolator. will be.

The lead block 170 is a pillar-shaped component made of a lead material that is installed through the center of the horizontal damping part in order to supplementally increase the damping ability of the seismic isolator 100 according to the present invention.

As shown in FIGS. 4 to 6 , the lead block 170 has an upper end supported on the lower end of the first vertical damping unit 140 , that is, the cylinder 142 , and the lower end of the horizontal damping unit 130 . By passing through the central part and being installed to be supported by the lower plate 110, the shape is deformed according to the horizontal vibration (HF) transmitted from the upper and lower structures 20 and 30, and the damping ability of the horizontal damping unit 130 is supplemented. do.

The lead block 170 may be made of lead, which can be restored to its original shape through recrystallization and molecular restoration after being deformed by an external force at room temperature of about 20°C.

That is, the lead block 170 absorbs the vibration (HF) in a manner that is once bent in one direction by the vibration (HF) in the horizontal direction applied from the upper structure 20 or the lower structure 30, and then the vibration (HF) ) is removed, the behavior is gradually restored to the original linear shape at room temperature.

On the other hand, in the inner space surrounded by the upper plate 120, the lower plate 110, and the protective cover 150, a lubricating material that facilitates the operation of the horizontal damping part 130, the first and second vertical damping parts 140, 160, etc. can be filled. In this case, the phase change material as described above may be mixed with the lubricating material so that a variable damping operation can be made according to the temperature change.

As described above, when a phase change material corresponding to the optimum operating temperature range of the lubricating material among various phase change materials is added to the lubricating material, the heat storage capacity of the lubricating material can be improved.

And when the viscosity of the lubricating material is changed due to the phase-change material that changes according to the ambient temperature, the second vertical damping unit 160 and the like can be smoothly lubricated while performing a variable damping operation according to the temperature.

As described above, the phase change material may be a paraffinic wax having a phase change temperature range of room temperature, or an organic alkane having a phase change temperature range of approximately 0°C. Even at this time, the phase change temperature range may be changed by mixing various types of phase change materials in various ratios.

As described above, the vertical damping reinforcement type seismic isolator 100 according to the embodiment of the present invention supports the lower part of the bridge structure 10, etc. to which various loads are continuously applied, as shown in FIG. It can be used as a seismic isolation bearing that cushions the load.

Here, the bridge structure 10 is an inverted V-shape, V-shape, toggle through the main frame, gusset 16, etc., such as the beam 12 constituting the road surface of the bridge and the pier 14 supporting the beam 12. It may be made of a brace 18 for reinforcing the bridge in various forms, such as a shape, and an upper structure 20 that is coupled to the brace and pier 14 and is fixedly installed on the ground, which is the lower structure 30 .

At this time, the seismic isolator 100 according to the embodiment of the present invention is installed between the upper structure 20 and the ground which is the lower structure 30, and as shown in FIGS. 4 to 6 , the lower structure 30 or the upper part Various types of three-dimensional vibrations (HF, VF) transmitted from the structure 20, that is, external loads (typhoons, earthquakes, etc.) are divided into horizontal and vertical components to effectively and complementarily buffer or dampen do.

In the foregoing, specific embodiments of the present invention have been described and illustrated, but it is common knowledge in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have Accordingly, such modifications or variations should not be individually understood from the spirit or point of view of the present invention, and the modified embodiments should belong to the claims of the present invention.

HF: Vibration in the horizontal direction VF: Vibration in the vertical direction
TD: Tensile strain CD: Compressive strain
VR: viscous resistance
10: bridge structure 12: beam
14: Pier 16: Gusset
18: brace 20: superstructure
30: substructure
100: vertical damping reinforcement type seismic isolator
110: lower plate 120: upper plate
122: fastening part 130: horizontal attenuation part
132: elastic plate 134: metal plate
140: first vertical damping unit 142: cylinder
F: fluid 144: operation member
144a: actuating rod 144b: actuating head
144c: through hole 150: protective cover
152: wrinkle 160: second vertical attenuation part
170: lead block

Claims (7)

a lower plate installed at the upper end of the lower structure; an upper plate installed at the lower end of the upper structure while being spaced apart from the lower plate; a horizontal damping part of an elastic material installed on the lower plate and elastically deformed left and right according to the horizontal vibration transmitted from the upper and lower structures to damp the vibration; A cylinder provided between the upper plate and the horizontal damping unit, and an operating member coupled to the upper plate to linearly move while forming viscous resistance with the fluid in the cylinder according to the vibration in the vertical direction transmitted from the upper and lower structures a first vertical damping unit for damping vibration; and a protective cover provided to surround the lower plate, the upper plate, the horizontal damping part and the first vertical damping part,
The horizontal damping unit is installed on the lower plate by being integrated with an elastic plate and a metal plate being alternately stacked,
A second vertical damping part is interposed between the upper plate and the horizontal damping part, which is compressively deformed up and down according to the vibration in the vertical direction transmitted from the upper and lower structures and overlaps the vibration,
In the central portion of the horizontal damping part, a lead block that is deformed in shape according to the vibration in the horizontal direction transmitted from the upper and lower structures and supplements the damping ability of the horizontal damping part is installed and penetrates,
In the inner space surrounded by the protective cover,
A vertical damping reinforcement type, characterized in that a lubricating material for smooth operation of the horizontal damping part and the first and second vertical damping parts, and a phase change material for variable damping operation according to temperature change are mixed and filled with each other isolator. According to claim 1,
The cylinder is
Consists of a housing shape for storing the fluid in a sealed state in the pressurized space formed therein,
The operating member is
an operation rod coupled to the upper plate;
an actuating head formed at an end of the actuating rod to linearly move the pressing space up and down according to vibration in a vertical direction; and
and a plurality of through-holes formed in the operation head so that the operation head forms viscous resistance with the fluid. 3. The method of claim 2,
In the area of the protective cover corresponding to the operating range of the first vertical damping part,
In order to guide the smooth operation of the first vertical damping part, a vertical damping reinforcement type seismic isolator, characterized in that a bellows structure is formed. 3. The method of claim 2,
The fluid is made of air or oil,
The oil is
The vertical damping reinforcement type seismic isolator further comprising a phase change material whose state is changed in a specified phase change temperature range so that the damping ability of the first vertical damping part varies with temperature. delete delete delete

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