KR101028217B1 - Double steel pipe type hybrid vibration control apparatus using viscoelasticity and friction - Google Patents

Abstract

PURPOSE: A double steel tube type composite damping device using visco-elasticity and friction force is provided to improve earthquake-proof reinforcement effect at lower cost. CONSTITUTION: A double steel tube type composite damping device using visco-elasticity and friction force comprises an inner damping body(20), an outer damping body(30), a high damping body(40), upper and lower connection plates, a friction pad(60), a fastener, and a locking pin(70). The inner damping body is composed of square steel pipes having fixed thickness and length. The outer damping body is inserted to the inner damping body and has same shape as but bigger size than the inner damping body. The upper and lower connection plates have one end located in the inner damping body and the other end located in the outer damping body in order to connect the inner and outer damping bodies. The friction pad is located between the upper and lower connection plates and the outer damping body. The fastener is compulsively pushed toward the upper and lower connection plates to connect the inner and outer damping bodies. The locking pin is fixed to the inner damping body through a locking pin assembly holes(20b) formed on the upper and lower connection plates in order to control the movement of the inner and outer damping bodies.

Description

Double steel pipe type hybrid vibration control apparatus using viscoelasticity and friction}

The present invention relates to a vibration suppression device manufactured to dissipate vibration energy due to wind or earthquake, and in particular, it is possible to cope with both earthquakes of a smaller size than wind and design-based earthquakes at overlapping portions of double steel pipes. The present invention relates to a double steel pipe type composite vibration damping device that combines high damping rubber and friction dampers designed to operate at larger Maximum Considerable Earthquakes, including design earthquakes.

Vibration control refers to the control of vibrations caused by wind or earthquakes in buildings, and a structure in which a special device or device is installed for vibration control is called a vibration suppression structure. The purpose of vibration suppression is to improve the safety and habitability of the structure by dissipating the vibration energy input to the structure due to wind or earthquake.

In the method of vibration suppression, the structure itself is equipped with a function to detect the vibration from the outside and the vibration of the structure according to the active control and the building to reduce the vibration of the structure by applying a control force corresponding to the vibration of the structure inside or outside the structure. There is a manual control to control the dynamic response of the building by installing additional energy dissipation devices to improve the damping performance of the structure.

Passive vibration dampers can be divided into mass tuning type and energy dissipation type. The former is mainly installed on the top of the building, mainly for the purpose of enhancing the wind habitability, and the latter is mainly installed on each floor to be used for the safety of the earthquake and the wind habitability.

Energy dissipation type vibration suppressors can be divided into displacement-dependent and speed-dependent types. Displacement-dependent devices utilize energy dissipation characteristics due to frictional forces between materials or plastic deformation of metals, and speed-dependent types are used when viscous and viscoelastic materials deform. By generating heat and dissipating vibration energy, the dissipated energy is large in proportion to the speed.

Recently, many high-rise buildings are being constructed, which are higher in height than the length, but since such high-rise buildings are greatly affected by vibrations, a vibration damping device is required to cope with various vibrations such as wind and earthquakes. Until now, it has been common to install a vibration damper separately according to the type of vibration source, but the problem is that the increase of the cost or the limitation of the construction plan is large.

In particular, in Korea, there are many buildings that were constructed before the seismic design standards were applied and the remodeling of old buildings is active, and the development of passive vibration damping devices that can achieve sufficient seismic reinforcement effect at low cost is required.

The present invention has been made in view of the above circumstances and has the following object.

The present invention does not need to install a separate vibration damper according to the type of vibration source, double seismic reinforcement structure can achieve a sufficient seismic reinforcement effect at a low cost when the seismic reinforcement of the building is not applied seismic design and remodeling of existing buildings It is an object to provide a device.

According to a preferred embodiment of the present invention for achieving the above object, the internal damping body consisting of a steel pipe having a certain thickness and length; An external damping body having a cross section and a constant length of the same shape relatively larger than the internal damping body and inserted into the internal damping body to have a constant overlapping section; A high damping rubber interposed between the inner damping body and the outer damping body in an overlapping section and viscoelastically deformed; A plurality of connecting plates, one end of which is disposed in the inner damping body and the other end of which is in an overlapping section of the inner and outer damping bodies; One or more friction pads disposed between the plurality of connecting plates and the external damping body and fixed to either side; The internal damping body and the external damping body, the external damping body, the high damping rubber, and the connecting plate are forcibly pushed to the friction pad side by forcing the connecting plate to the friction pad side through the long holes, which are equally sized in the thickness direction of the cross section in the overlapping section. Fastening means for connecting the damping body; And a locking pin fixed to the inner damping body and inserted into the locking pin insertion hole formed at one end of the connecting plate to limit the relative displacement between the inner damping body and the outer damping body. Type combined vibration isolator is provided.

According to another suitable embodiment of the present invention, the inner damping body and the outer damping body are composed of rectangular steel pipes.

According to another suitable embodiment of the invention, the high damping rubber has a square having a thickness corresponding to the distance between the inner damping body and the outer damping body and a length corresponding to the length of the overlapping section of the inner damping body and the outer damping body. It is configured in a cylindrical shape.

According to another suitable embodiment of the present invention, the plurality of connecting plates are composed of a pair of double steel pipe composite vibration damper characterized in that configured to face each other in the up and down direction of the overlapping section of the inner damping body and the outer damping body. .

The double steel pipe composite vibration damping device according to the present invention comprises an inner damping body and an outer damping body made of a steel pipe, and a high damping rubber for viscoelastic deformation and a friction plate and a friction pad for generating frictional force are installed at an overlapping portion of the two bodies. For earthquakes smaller than the design earthquake, the energy dissipation capacity due to the viscoelastic deformation of high damping rubber reduces the vibration energy of the main structure and minimizes the residual strain, and the frictional resistance for the maximum earthquake, including the design earthquake. The vibration of the structure is controlled to minimize the damage of the main structure.

Therefore, it is possible to cope with one vibration damper without installing a separate vibration damper according to the type of vibration source, so that the cost can be reduced and the freedom of construction planning is improved.

In addition, it is possible to achieve sufficient seismic reinforcement effect at a low cost when remodeling a building and an old building that were constructed before the seismic design criteria were applied.

1 is an exploded perspective view showing a hollow composite dust removal apparatus according to an embodiment of the present invention.
Figure 2 is a perspective view showing a hollow composite dust removal apparatus according to an embodiment of the present invention.
Figure 3 is a front view showing a hollow composite dust removal apparatus according to an embodiment of the present invention.
Figure 4 is a side view of a hollow composite dust removal apparatus according to an embodiment of the present invention.
Figure 5a, 5b is a state diagram used in the hollow composite dust removal apparatus according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view showing a double steel pipe composite dust suppressing apparatus according to an embodiment of the present invention, Figure 2 is a perspective view, Figure 3 is a front view, Figure 4 is a side view.

As shown in Figures 1 to 4, the composite vibration damping device 10 of the present invention is provided with an internal damping body 20 consisting of a rectangular steel pipe having a predetermined thickness (t1) and length. In the present embodiment, the internal damping body 20 is illustrated as a steel pipe having a rectangular cross-sectional shape, but the present invention is not limited thereto and may be configured as a steel pipe having a circular or polygonal cross-sectional shape. The inner damping body 20 has a plurality of long holes 20a penetrating in the thickness direction at upper and lower surfaces of one end side, that is, the side inserted into the outer damping body 30. In addition, the internal damping body 20 has a locking pin assembly hole 20b formed close to the long hole 20a.

The inner damping body 20 has a predetermined length inserted into the outer damping body 30. The outer damping body 30 has a cross section of the same shape and a certain length that is relatively larger than the inner damping body 20. The thickness t2 of the outer damping body 30 may be equal to or larger than the thickness t1 of the inner damping body 20. The inner damping body 20 is inserted into the outer damping body 30 to have a constant overlapping section L, and a high damping rubber 40 to be described later is provided between the inner damping body 20 and the outer damping body 30. A gap that can be inserted is formed. The outer damping body 30 has a plurality of long holes 30a penetrated in the thickness direction at upper and lower surfaces of one side end included in the overlapping section L, that is, the side where the inner damping body 20 is inserted. A friction pad mounting groove 30b for mounting a friction pad 60 to be described later is formed between the upper and lower pairs of long holes 30a.

As such, by configuring the inner damping body 20 and the outer damping body 30 with a hollow steel pipe, the bending and torsional rigidity of the body itself can be increased without increasing the weight. Therefore, when the composite vibration suppression apparatus of the present invention operates against the wind or earthquake, the body does not deform and the viscoelastic deformation of the high damping rubber 40 installed in the overlapping section of the internal damping body 20 and the external damping body 30 and The frictional resistance between the friction plate and the friction pad can be induced.

The high damping rubber 40 is interposed in the circumferential surface of the portion of the inner damping body 20 inserted into the outer damping body 30, that is, the gap between the inner damping body 20 and the outer damping body 30 in the overlapping section. have. The high damping rubber 40 has a thickness corresponding to the distance between the inner damping body 20 and the outer damping body 30 and the length of the overlap section L of the inner damping body 20 and the outer damping body 30. It consists of a square cylinder shape having a length corresponding to the. A pair of long holes 40a are formed on the upper and lower surfaces of the high damping rubber 40, respectively. The high damping rubber 40 has an inner damping body 20 and an outer damping so that the inner and outer surfaces may be deformed by the shear force generated by the relative displacement of the inner damping body 20 and the outer damping body 30, respectively. It is bonded to the body (30). The high damping rubber 40 may be any high damping rubber known in the art, and generally has a constant temperature after adding additives such as fillers, vulcanizing agents, antioxidants and plasticizers to natural rubber or / and carbon black. It is manufactured through vulcanization process under pressure and pressure. The elasticity of the high damping rubber can be adjusted according to the ratio of the additives and the energy dissipation capacity is determined by the elasticity.

Upper and lower ends of the internal damping body 20 and the external damping body 30 are positioned at the internal damping body 20 and the other ends are positioned at the external damping body 30 so that the internal damping body 20 and the external damping body 30 are disposed. The upper and lower connecting plates 50 are connected to each other. The upper and lower connection plates 50 each have a plate shape having a predetermined thickness, and a plurality of bolt insertion holes 50a are formed at one end thereof, and a locking pin insertion long hole 50b is formed at the other end thereof. The upper and lower connection plates 50 are locking formed in the internal damping body 20 in a state in which the long hole 20a formed in the internal damping body 20 is inserted to communicate with the long hole 30a formed in the external damping body 30. It has a length greater than the length between the pin assembly hole 20b and the long hole 30a formed in the outer damping body 30. The upper and lower connecting plates 50 may be made of aluminum or aluminum alloy, cast iron or cast steel, cast iron or non-ferrous cast, stainless steel or stainless alloy steel.

A friction pad 60 is interposed between the upper and lower connection plates 50 and the external damping body 30, and the friction pads 60 are formed on the upper and lower surfaces of the external damping body 30, respectively. It is attached to the friction pad mounting groove 30b. The friction pad 60 is an aluminum composite material in which ceramic particles are dispersed and reinforced in aluminum or an aluminum alloy, a carbon-carbon composite material, a semi-metallic friction material using metal fiber, metal fiber and oil. ㆍ It can be made of any one of low-steel friction materials using mixed non-machined fibers and non-steel friction materials using only organic / inorganic fibers without using any metal fibers. Preferably, in consideration of performance and environmental aspects can be made of Non Asbestos Organism (NAO).

A fastening means for connecting the inner damping body 20 and the outer damping body 30 to each other is provided while forcibly contacting the upper and lower connecting plates 50 toward the friction pad 60. The fastening means has a long hole (20a, 30a, 40a) and the bolt insertion hole (50a) formed in the inner damping body 20, the outer damping body 30, high damping rubber 40 and the upper and lower connecting plates 50 It consists of a nut 72 screwed to both ends of the fastening bolt 70 and the fastening bolt 70 through. Therefore, the friction pad 60 is forced to the bottom surface of the connecting plate 50 by the screw tightening force of the fastening bolt 70 and the nut 72.

It penetrates the locking pin assembly holes 20b formed on the upper and lower surfaces of the inner damping body 20 and is fixed to the inner damping body 20 to limit the relative movement of the inner damping body 20 and the outer damping body 30. The locking pin 70 is installed. The locking pin 70 has an elliptical cross section and is forced through the locking pin insertion hole 50b of the upper and lower connecting plates 50 to be fixed to the locking pin assembly hole 20b of the internal damping body 20. It is. The cross-sectional shape of the locking pin 70 is not limited to the illustrated oval and may have various cross-sectional shapes, such as a circle and a quadrangle, as long as it can be forcedly fitted into the locking pin assembly hole 20b.

The double steel pipe-type composite vibration damping device 10 configured as described above has a high damping rubber 40 fitted to a circumferential surface of one side end of the inner damping body 20, and an outer damping body 30 on a circumferential surface of the high damping rubber 40. ) Is inserted. At this time, the internal damping body 20, the external damping body 30 and the high damping rubber 40 are assembled so that the long holes 20a, 30a, 40a correspond to each other in a vertical line. Therefore, the high damping rubber 40 is installed in the overlapping section L of the internal damping body 20 and the external damping body 30.

Next, in a state in which the pair of connecting plates 50 are positioned close to the upper and lower surfaces of the external damping body 30, respectively, the fastening bolt 70 is disposed in the internal damping body 20, the external damping body 30, and the high damping. The rubber 40 and the connecting plate 50 are inserted into the long holes 20a, 30a and 40a and the bolt insertion holes 50a, respectively, and then tightened with the nut 72. Therefore, the connecting plate 50 is pressed against the friction pad 60 by force. That is, the friction pad 60 is in close contact with the bottom surface of the connecting plate 50 between the external damping body 30 and the connecting plate 50.

Then, the locking pin 80 is inserted into the locking pin insertion hole 50b of the connecting plate 50 and then forcibly inserted into the locking pin assembly hole 20b of the internal damping body 20 to complete the assembly. .

The double steel pipe-type composite vibration damping apparatus according to the embodiment thus assembled is basically operated by the relative movement of the inner damping body 20 and the outer damping body 30 by tension and compression. That is, when an earthquake of a smaller magnitude than the wind or the design earthquake acts, the high damping rubber 40 interposed between the internal damping body 20 and the external damping body 30 deforms and absorbs vibration energy. In this case, the amount of deformation of the high damping rubber 40 occurs between the locking pin 80 and the gap between the locking pin insertion hole 50b of the connecting plate 50 side. At this time, the high damping rubber 40 has the advantage of absorbing more vibration energy by being installed over the entire circumferential surface in a rectangular cylinder shape.

In addition, when the maximum level earthquake, including a design earthquake, is applied, the relative movement of the internal damping body 20 and the external damping body 30 is limited by the locking pin 80 and the friction pad 60 is connected to the connecting plate 50. The frictional resistance that occurs while moving from) dissipates seismic energy.

Therefore, the composite vibration suppression apparatus according to the present invention can effectively cope with both wind and earthquake. That is, the composite vibration isolator according to an embodiment of the present invention includes a friction pad 60 that absorbs seismic energy during a maximum level earthquake including a design earthquake and a square cylinder shape that suppresses vibration during a wind or small scale earthquake. It can be said to be one vibration damping device in which the damping rubber 40 is combined.

Double steel pipe composite vibration damping apparatus according to an embodiment of the present invention configured as described above can be applied to various structures to cope with both wind and earthquake.

The composite vibration damping device according to the present invention is basically configured to operate by compressive force and tensile force, that is, axial force, and thus is effective when applied to a brace. That is, as shown in Figure 5a, it can be installed in a diagonal direction on the neighboring pillar (81). At this time, the end may have any details known in the art that can be bonded to the gusset plate 83 installed in the beam 82.

As another example, as is known from Patent Registration No. 10-0943156, it may be installed in the same newsletter. That is, the embedded reinforcing bar assembly 120 is embedded in the left and right pulley 100 as shown in Figure 5b, the embedded reinforcing bar assembly 120 is a bent portion of a pair of U-shaped reinforcement 121 and U-shaped reinforcement 121 Consists of a stirrup reinforcement 123 is coupled to surround the bent steel plate 122 and a pair of U-shaped reinforcement 121, the U-shaped reinforcement 121 of the embedded reinforcing bar assembly 120 of one embodiment of the present invention For example, the inner damping body 20 and the outer damping body 30 side end steel plates 102a and 102b may be fixed by welding. In this case, the multiple vibration suppression apparatus according to the present invention may be configured to constitute a pair.

Meanwhile, in the above, the friction pad 60 included in the double steel pipe type composite vibration suppression device is installed on the upper and lower surfaces of the external damping body 30. However, the friction pad 60 is further installed on both sides by adding the friction pad 60. can do. At this time, the friction pad may be installed in the same structure using the connecting plate, the locking pin and the friction pad fastening means.

In addition, although one friction pad 60 is installed on one installation surface, it may be installed so as to contact if it consists of a plurality.

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

20: internal damping body
20a, 30a, 50a: long hole
30: external damping body
40: high damping rubber
50: connecting plate
50b: Long hole for locking pin insertion
60: friction pad
70: fastening bolt

Claims (4)

An internal damping body 20 composed of a steel pipe having a predetermined thickness and length;
An external damping body 30 having a cross section and a constant length of the same shape relatively larger than the internal damping body 20 and inserted into the internal damping body 20 to have a constant overlapping section L;
A high damping rubber 40 interposed between the inner damping body 20 and the outer damping body 30 in an overlapping section and viscoelastically deforming;
A plurality of connecting plates 50 having one end disposed in the inner damping body 20 and the other end disposed in an overlapping section of the inner and outer damping bodies 20 and 30;
One or more friction pads 60 disposed between the plurality of connecting plates 50 and the external damping body 30 and fixed to either side;
Long hole 20a, 30a, 50a through which the inner damping body 20, the outer damping body 30, the high damping rubber 40, and the connecting plate 50 coincide with each other in the thickness direction of the cross section in the overlapping section. Fastening means for connecting the internal damping body 20 and the external damping body 30 while forcibly pushing the connecting plate 50 toward the friction pad 60 through the); And
The amount of displacement between the internal damping body 20 and the external damping body 30 is inserted into the locking pin insertion hole 50b formed at one end of the connecting plate 50 while being forcedly fixed to the internal damping body 20. Double steel pipe-type combined vibration suppressing device comprising a locking pin (80) to limit. The method according to claim 1,
The inner damping body 20 and the outer damping body 30 are double steel pipe type composite vibration suppressor, characterized in that consisting of a rectangular steel pipe. The method according to claim 1,
The high damping rubber 40 has a thickness corresponding to the distance between the inner damping body 20 and the outer damping body 30 and the length of the overlap section L of the inner damping body 20 and the outer damping body 30. Double steel pipe-type composite vibration suppressor, characterized in that configured in a rectangular cylinder shape having a length corresponding to the. The method according to claim 1,
The plurality of connecting plates 50 is a double steel pipe composite vibration damper, characterized in that composed of a pair installed opposite to each other in the up and down direction of the overlapping section of the inner damping body 20 and the outer damping body 30.

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