KR102381563B1 - Two-way tuned mass dampers using seismic isolation support and one-way guide rail - Google Patents

Abstract

The present invention provides a two-way tuned mass damper using a seismic isolation support and a one-way guide rail, which can exert different stiffness effects in two directions, thereby enable two-way tuning, can greatly reduce the precision of the guide rail that guides one-way vibration, and enables a mass body with actually infinite mass and a free shape to be manufactured and installed through concrete pouring, thereby reducing costs. According to an appropriate embodiment of the present invention, a two-way tuned mass damper using a seismic isolation support and a one-way guide rail comprises: a plurality of concrete beds disposed on the upper surface of the uppermost slab of a basic frame and installed to be located on at least two or more columns; seismic isolation supports disposed on the concrete beds, respectively, having the same stiffness and damping in all directions, and installed at the same number as the concrete beds; guide blocks fixed and installed two or more seismic isolation supports, arranged in at least one direction, selected from the plurality of seismic isolation supports, and one-way guide rails slidably coupled to the guide blocks and installed to linearly move in only one direction; and a concrete mass body formed by pouring in-situ concrete on all the seismic isolation supports, or produced with precast concrete in a factory and joined, not causing a movement of the seismic isolation supports installed at a position where the direction of the horizontal force of an earthquake and the direction of movement of the one-way guide rails match each other, and causing a movement of the seismic isolation supports installed at a position where the direction of the horizontal force of the earthquake and the direction of movement of the one-way guide rails are orthogonal to each other, when an earthquake occurs.

Description

Two-way tuned mass dampers using seismic isolation support and one-way guide rail

The present invention relates to a tuned mass damper used for damping vibrations of buildings, and in particular, exhibits different stiffness effects in two directions to enable two-way synchronization, but to improve the precision of a guide rail that guides vibration in one direction. It relates to a two-way synchronous mass damper using a seismic isolation bearing and a one-way guide rail that can be significantly lowered and that can produce and install a mass with virtually infinite mass and free shape by pouring concrete, thereby reducing costs significantly.

In general, seismic isolation (免震) is a method of avoiding earthquakes by placing a flexible seismic isolation layer in the lower or middle layer of a structure to greatly reduce the response of the structure to an earthquake load. Lead rubber bearings made by laminating flexible rubber and recrystallizable lead are most widely used for the seismic isolation layer.

However, the purpose of seismic isolation is to simply make a long period to isolate the seismic load coming in the short period form from the frequency band, regardless of the direction, and does not perform accurate period synchronization. Therefore, the seismic isolation layer of a general seismic isolation structure has the same stiffness and damping in all directions.

A tuned mass attenuator for seismic resistance reduces vibrations of structures and machines by the movement of a mass that is tuned (tuned) to the natural frequency of the structure. However, this device is only effective for one vibration mode for one direction. A specially designed and manufactured synchronous mass damping device to significantly reduce the response of a structure to an earthquake is composed of a spring and rail to implement rigidity, a viscous or friction damping device to implement damping, and a mass to implement mass. . Therefore, in order to design a synchronous mass damping device, it is necessary to design a spring, select an appropriate rail model, and select a viscous or friction damping device. However, these items have the following problems.

In the case of spring design, there are many design variables such as wire diameter, outer diameter, material, and number of turns, and various design requirements such as buckling prevention, allowable stress limit, and wire diameter limit are limited. There are problems such as noise and corrosion. In the case of other rail designs, an appropriate model is selected by calculating the load acting on the rail, and high-grade rail blocks and precise construction are required so that the friction force of the rail does not affect the natural frequency of the tuned mass damping device, which is expensive. It takes

Synchronous mass dampers require additional viscous or friction damping devices to limit excessive motion. However, the movement capability of the damping device is difficult to identify and there are many unknowns, and since many manufacturers are reluctant to provide technical data, their own tests may be necessary. There is a disadvantage in that a lot of time and money are consumed in manufacturing and transportation.

As the background technology of the present invention, as Korean Patent Registration No. 10-0829489 (Patent Document 1), a 'modular tuning mass attenuator' has been proposed. This is to effectively control the vibration of a structure by using a large number of modular, small-scale tuning mass attenuators with very free adjustment of mass and spring constants in one place or distributing them in several places of the structure. However, the background art has difficulties in designing springs, etc., and by installing the inertia block in the housing, the free shape of the inertia block is limited.

Another technology that is the background of the present invention is Korean Patent Registration No. 10-0568124 (Patent Document 2), in which a 'vibration control device' is controlled. The size and number of coil springs are greatly reduced by first adjusting the frequency of the movable mass by using laminated rubber that allows vertical deformation during horizontal movement and auxiliary adjusting the frequency of the movable mass using a coil spring. it was made to be However, the background art also has difficulties in designing a coil spring or the like.

Korean Patent Registration No. 10-0829489 Korean Patent Registration No. 10-0568124

The present invention enables two-way synchronization by exerting different stiffness effects in two directions, but can greatly reduce the precision of a guide rail that guides vibration in one direction, and can form a mass with virtually infinite mass and free shape by pouring concrete. The purpose of this is to provide a two-way synchronous mass damper using a seismic isolation bearing and a one-way guide rail that can be manufactured and installed to achieve significant cost reduction.

A two-way tuning mass damper using a seismic isolation bearing and a one-way guide rail according to a suitable embodiment of the present invention,

a plurality of concrete beds disposed on the upper surface of the uppermost slab of the basic frame and installed so as to be positioned above the pillars in at least two places;

a seismic isolating bearing disposed on each concrete bed, having the same stiffness and damping in all directions, and installed in the same number as the concrete bed;

Two or more of the plurality of seismic isolating supports are selected from among those arranged in at least one direction, and a guide block fixed to the selected plurality of seismic isolating supports and a one-way guide installed to be slidably coupled to the guide block to enable linear movement in only one direction rail;

Select all of the seismic bearings and cast them with on-site concrete, or they are made with precast concrete and then joined together. It is characterized in that it includes a concrete mass that causes the movement to occur on the seismic isolation bearing installed at a position where the horizontal force direction of the earthquake and the movement direction of the one-way guide rail are orthogonal to each other.

In addition, in order to protect the one-way guide rail from the poured concrete on the upper part of the one-way guide rail, a guide rail protection plate is further installed.

In addition, the guide rail protection iron plate is inserted into the one-way guide rail and is fixedly installed by the protection iron plate fastening bolts fastened with nuts. characterized.

In addition, a lower plate having a plurality of bolt insertion holes is installed in the center of the concrete bed, and a cylindrical insert nut that is disposed coaxially with the bolt insertion hole as the lower part of the lower plate and is embedded in the concrete bed and fastened with the seismic isolation support fixing bolt. It is characterized in that it is further installed.

In addition, if the number of columns in the basic frame is insufficient or the axis of the seismic isolation bearing and the column do not match, additionally attach the H-beam column to the existing column using anchor bolts, and then install the girder on the H-beam column in the orthogonal direction. And, it is characterized in that the concrete mass body is mounted after sequentially installing the seismic isolation support, the guide rail block and the one-way guide rail in addition to the girder.

In addition, the seismic isolation support is characterized in that it is any one of a lead seismic support in which flexible rubber and lead are laminated, a high damping rubber support, and a tin seismic support.

According to the present invention, it is possible to significantly reduce the precision of the guide rail for guiding the one-way vibration by omitting the spring and the viscous damping device used in the conventional tuning mass attenuator, thereby significantly reducing the cost. In addition, the mass body can have virtually infinite mass and free shape by pouring concrete, and since processing and transport of the iron mass is unnecessary, the cost can be greatly reduced in manufacturing the mass body.

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in the accompanying drawings It should not be construed as being limited.
1 is a perspective view of a two-way tuned mass attenuator according to an embodiment of the present invention;
Figure 2 is a perspective view of a guide block applied to a part of the two-way tuning mass damper of Figure 1, a one-way guide rail and a guide rail protection plate installed.
3 is a view showing the installation state of the guide block, the one-way guide rail, the guide rail protection plate and the seismic isolation support shown in FIG. 2 .
Figure 4a is a state diagram in which the one-way guide rail included in the two-way tuning mass damper of Figure 1 is installed in a direction orthogonal to the direction of the earthquake horizontal force.
Figure 4b is a state diagram in which all seismic isolation bearings deform when an earthquake horizontal force is applied to the two-way synchronized mass damper of Figure 4a.
Figure 5a is a state diagram in which the one-way guide rail included in the two-way tuning mass damper of Figure 1 is installed to coincide with the direction of the earthquake horizontal force;
5B is a state diagram in which only the seismic isolation bearing without a one-way guide rail deforms when an earthquake horizontal force is applied to the two-way synchronized mass damper of FIG. 5A.
6A is an exemplary installation view of a two-way synchronous mass damper according to an embodiment of the present invention, and is a use state diagram in which all seismic isolation bearings behave when an earthquake horizontal force is applied in the Y direction.
Fig. 6b is a state diagram in use in which only the seismic isolation bearing without the one-way guide rail is installed when the seismic horizontal force is applied in the Y direction in the arrangement state diagram as shown in Fig. 6a.
7A and 7B are a front view and a side view as an example of installation of a seismic isolation support when the number of columns in the basic frame is insufficient in the present invention or when the axes of the seismic isolation support and the column do not match.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

The two-way synchronized mass damper according to the present invention is disposed on the upper surface of the uppermost slab 102 of the basic frame 100 as shown in FIGS. 12) is installed.

The concrete bed 12 may be installed on the upper portion of each column 104 and may be arranged in the Y-direction (vertical direction) and the X-direction (horizontal direction) as shown in FIGS. 6A and 6B , for example.

A seismic isolation support 14 is installed on each concrete bed 12 . Therefore, the seismic isolation support 14 is installed in the same number as the concrete bed 12 . The seismic support 14 is installed one-to-one on the concrete bed 12 to have the same stiffness and damping in all directions.

As the seismic isolation bearing 14 in the present embodiment, a lead seismic isolation bearing in which flexible rubber and lead are laminated is used, but in addition, it may be any one of a high damping rubber bearing and a tin seismic isolating bearing.

For the installation of the seismic isolation support 14 , a lower plate 13 having a plurality of bolt insertion holes 131 is installed in the center of the concrete bed 12 , and a bolt insertion hole 131 is installed as a lower portion of the lower plate 13 . ) and a cylindrical insert nut 11 that is embedded in the concrete bed 12 and fastened with the seismic isolation support fixing bolt 15 may be further installed.

Therefore, the seismic isolation support fixing bolt 15 is inserted into the lower flange of the seismic support 14 and the bolt insertion hole 131 of the lower plate 13, and then is fastened to the cylindrical insert nut 11. It is firmly fixed and installed on the bed (12) via the seismic isolation support fixing bolt (15).

Two or more of the plurality of seismic isolating supports 14 are selected from among those arranged in at least one direction, and the guide block 16 is fixedly installed on the selected plurality of seismic isolating supports 14, and the guide block 16 slides on the guide block 16. The one-way guide rail 18 is installed so that it can be combined and linearly moved in only one direction. In this embodiment, the guide rail 18 is installed so as to be able to move linearly only in the X direction as shown in FIGS. 5B and 6B.

Therefore, when the one-way guide rail 18 is installed in the X direction as shown in FIG. 5B , that is, when the longitudinal direction of the one-way guide rail 18 coincides with the X direction, the one-way guide rail 18 moves in the X direction. It is possible to move only in , and the movement in the Y direction is suppressed, so that linear motion is possible only in one direction (X direction).

Therefore, when an earthquake arrives, as shown in FIGS. 5B and 6B , the seismic isolation bearing 14 installed at a position where the movement direction (vibration direction) of the earthquake coincides with the movement direction of the one-way guide rail 18 does not occur. Of course, the other seismic isolating support 14 on which the one-way guide rail 18 is not installed is deformed due to a behavior (displacement amount ΔA).

In addition, when an earthquake arrives, the seismic isolation bearing 14 installed at a position where the movement direction of the earthquake and the movement direction of the one-way guide rail 18 is orthogonal (displaced) behaves as shown in FIGS. 4A and 6A (displacement amount ΔB) occurs to be transformed

All of the seismic isolation bearings 14 are selected and cast with on-site concrete or the concrete mass 20 joined after being factory-manufactured with PC (precast concrete) is provided. When the concrete mass body 20 is poured with on-site concrete, the reinforcing bar 202 is pre-assembled as shown in FIGS. 1 and 4A to the upper part of the formwork (not shown) and then manufactured.

Here, in order to protect the one-way guide rail 18 from the concrete poured for forming the concrete mass 20 on the upper part of the one-way guide rail 18, a guide rail protection iron plate 19 may be further installed. At this time, as shown in FIG. 3, the guide rail protection iron plate 19 is inserted into the one-way guide rail 18 and fixed by the protection iron plate fastening bolts 17a fastened with nuts 17b, and the protection iron plate fastening bolts 17a. is preferably installed so as to protrude a certain amount from the guide rail protection iron plate 19 so that it can be synthesized in the concrete mass 20 (cast concrete layer). Here, the guide rail protection iron plate 19 may form a locking jaw 191 for the formwork bent in an L-shape at the end as shown in FIG. 2 in order to facilitate the mounting and installation of the formwork.

As described above, the two-way tuning mass damper according to the present invention is manufactured to have different natural frequencies (determined by the ratio of mass and stiffness) in two directions in order to control vibration in two directions of a building. In general seismic isolation, all bearings have the same stiffness effect in all directions. However, the present invention allows the seismic isolating bearings 14 on which the one-way guide rail 18 is installed to move freely without any resistance in a specific direction, so that the seismic isolating layer can have different stiffness effects in two directions. there will be

The seismic isolation bearing 14 to which the one-way guide rail 18 is attached is determined by the ratio of stiffness that can be obtained by multiplying the square value of the natural frequency in the biaxial direction by the mass of concrete. For example, if the total number of seismic isolation bearings 14 is 24 and X-direction rigidity: Y-direction rigidity = 3: 4, one-way guide rails 18 in the X direction are installed on six seismic isolation bearings 14. do. Therefore, in the X direction, the rigidity of the 18 seismic isolating bearings 14 acts, and in the Y direction, the rigidity of the 24 seismic isolation bearings 14 acts, so that two-way synchronization is possible.

On the other hand, when the number of pillars 104 in the basic frame 100 is insufficient or the axes of the seismic isolation support 14 and the pillars 104 do not match, anchor bolts to the existing pillars 104 as shown in FIGS. 7a and 7b. After additionally joining the H-beam steel column 32 using (30), the girder 34 is installed orthogonally to the H-beam steel column 32, and the seismic isolation support 14 and the guide rail block additionally to the girder 34 ( 16) and one-way guide rails 18 are sequentially installed, and then the concrete mass body 20 is mounted.

As such, in the present invention, the spring and the viscous damping device used in the conventional tuning mass attenuator are omitted, and the precision of the one-way guide rail 18 can be greatly reduced, so that it is possible to significantly reduce the cost. In addition, since the concrete mass 20 can be manufactured by pouring concrete, virtually infinite mass and free shape are possible, and processing and transport of the iron mass is unnecessary, so that the cost can be greatly reduced in manufacturing the mass body.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art can make various modifications and modified inventions without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The present invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

12: concrete bed
14: seismic isolation support
15: seismic isolation support fixing bolt
17a: protection iron plate fastening bolt
18: one-way guide rail
19: guide rail protection plate
20: concrete mass
30: anchor bolt
32: H-beam column
100: basic frame
104: pillar

Claims (6)

A plurality of concrete beds (12) disposed on the upper surface of the uppermost slab (102) of the basic frame (100) and installed so as to be positioned above at least two or more columns (104);
a seismic isolation support 14 disposed on the concrete bed 12 and installed in the same number as the concrete bed 12 with the same stiffness and damping in all directions (X, Y directions);
Two or more of the plurality of seismic isolating supports 14 are selected from among those arranged in at least one direction, and which is slidingly coupled to the guide block 16 and the guide block 16 fixedly installed on the selected plurality of seismic isolating supports 14 . a one-way guide rail 18 installed so as to be able to move linearly in only one direction;
All seismic isolation bearings 14 are selected and cast with on-site concrete or factory-made with precast concrete (PC) and joined to match the horizontal force direction of the earthquake and the direction of movement of the one-way guide rail 18 when an earthquake arrives. A concrete mass body 20 that does not cause any movement in the seismic isolation bearing 14 installed at the position, and causes the movement to occur in the seismic isolation bearing 14 installed in a position where the direction of the horizontal force of the earthquake and the movement direction of the one-way guide rail 18 are orthogonal to each other ); includes;
When the number of pillars 104 in the basic frame 100 is insufficient or the axes of the seismic isolation support 14 and the pillars 104 do not match, the H-beam steel using the anchor bolts 30 on the existing pillars 104 After the column 32 is additionally joined, the girder 34 is installed on the H-beam steel column 32 in the orthogonal direction. (18) is sequentially installed and then the concrete mass body (20) is mounted. A two-way synchronized mass damper using a seismic isolation bearing and a one-way guide rail. The method of claim 1,
Using a seismic isolation support and a one-way guide rail, characterized in that a guide rail protection iron plate 19 is further installed on the upper portion of the one-way guide rail 18 to protect the one-way guide rail 18 from the concrete poured. Two-way tunable mass attenuator. 3. The method of claim 2,
The guide rail protection iron plate 19 is inserted into the one-way guide rail 18 and fixed by a protection iron plate fastening bolt 17a fastened with a nut 17b. ), a two-way synchronous mass damper using a one-way guide rail and a seismic isolation bearing, characterized in that it is installed to protrude a certain amount from the guide rail protection plate 19 so that it can be synthesized in the . The method of claim 1,
A lower plate 13 having a plurality of bolt insertion holes 131 is installed in the center of the concrete bed 12, and the lower plate 13 is disposed coaxially with the bolt insertion hole 131 to the bottom of the concrete bed ( A two-way synchronous mass damper using a seismic isolation support and a one-way guide rail, characterized in that the cylindrical insert nut 11 that is embedded in the 12) and fastened with the seismic isolation support fixing bolt 15 is further installed. delete The method of claim 1,
The seismic isolation bearing (14) is a two-way synchronous mass damper using a one-way guide rail and a seismic isolation bearing, characterized in that any one of a flexible rubber and lead laminated lead seismic support, a high damping rubber support, and a tin seismic support.

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