KR100963883B1 - Detachable device for vibration and noise decrease - Google Patents

Abstract

The present invention is provided as a weight adder and a weight adder to be detachable to the steel bridge, while overlapping each other to be installed so that the number and state of the installation can be arbitrarily changed to the vibration and noise generated in the steel bridge It relates to a noise or vibration reduction device for steel bridges that can be quickly and effectively installed.

Steel bridge, noise, vibration reduction

Description

Removable noise or vibration reduction device for steel bridges {DETACHABLE DEVICE FOR VIBRATION AND NOISE DECREASE}

The present invention relates to a noise or vibration reduction device for a bridge that can be detached. More specifically, the present invention relates to a steel bridge vibration or noise reduction device for reducing vibration or noise of a bridge due to a working load in a steel bridge including a steel plate girder or a steel box girder.

Figure 1a shows a bridge attenuation device (Korean Patent Laid-Open Patent Publication No. 2003-83911) using a kind of damper (Damper) in order to reduce the conventional steel bridge vibration or noise.

That is, the bridge attenuating device is to install the upper beams (11, 12) on the lower surface of the main beam 20, the lower beam 13 is installed below the upper beam, the upper beams (11, 12) and The lower beam 13 is connected to each other by the viscous material 14, the front end portion of the lower beam 13 is tensioned from the upper surface of the bridge pier on both sides of the bridge so that the tension material 15 through which the pulling force is inverted in the main beam. Although not shown, the upper beams 11 and 12 and the lower beam 13 may be connected to each other by an elastic body including a spring to each other.

Thus, when the vehicle passes, the vibration of the bulletin 20 is transmitted to the viscous material 14 connected to the lower ends of the upper beams 11 and 12 through the upper beams 11 and 12 connected to the bulletin 20. The viscous material is to absorb the vibration energy by the damping effect proportional to the relative speed of the bulletin 20,

In addition, when the elastic body is installed, the vibration of the upper beam 20 generated by the passage of the vehicle generates a reaction force proportional to the relative displacement of the beam connected to the elastic body, and at the same time, the vibration of the bullet beam is also transmitted to the viscous material through the upper beam. It can be seen that the vibration energy is absorbed by the damping effect proportional to the relative velocity of the tension member and the bullet.

Compared with the existing damping device, the performance is excellent and no additional maintenance is required, and the existing aging bridge can be installed without the control of the vehicle. Although it can be applied to the advantage, but the cost is somewhat expensive, installation and construction is actually a problem that was pointed out.

Figure 1b also shows a noise, vibration reduction device installed in the steel box girder 30, in particular of the bridge girders.

That is, the noise and vibration reduction device is a plurality of anchors 31 installed on the inner bottom surface of the steel box girder 30, the reinforcing bars 32 installed thereon and the reinforced concrete 33 formed to a predetermined thickness thereon, and steel On both sides of the box 30, a plurality of anchors 31 and a sound absorbing material 34 disposed thereon are also provided with polyester in a predetermined thickness.

Reinforced concrete and sound-absorbing material of heavy material are installed in steel box to enable the primary control of resonance sound by increasing the weight of concrete, resulting in vibration damping effect, and to reduce the noise and vibration by enabling secondary control of reflected sound as sound absorbing material. To this end, there is an advantage in that it is economical compared to the use of the conventional exterior article attachment and anti-vibration paint, etc., but it has been pointed out that the usability may be reduced because it is fixedly installed.

Also shown in Figure 1c is a steel box 40 of the steel structure of the bridge to prevent vibration.

That is, the insertion hole 41 penetrates into and out of one side of the steel box 40; Inserted into the insertion hole 41 is installed in the steel box 40 and the air inlet member 43 and the steel box of the rubber material to fill the air in the inlet 42 to absorb the vibration of the steel box 40 Fixing bolts inserted into the plurality of fastening holes formed on the outer circumferential surface of the insertion hole 41 of the 40 are fastened to be composed of a blocking plate 44 for blocking the insertion hole 41 of the steel box 40. In addition, even though vibration or shock is applied to the steel structure of the bridge by filling the air injection member, it can be seen that the air injection member efficiently absorbs vibration. However, there is a merit that it is relatively easy to install and install, but it has been pointed out that the vibration reduction effect may be relatively lower than the vibration effect due to self weight increase.

As to solve the problems of the prior art of the present invention,

The object of the present invention is to be able to manufacture in a variety of forms, but also to be removable, while greatly improving the workability and usability, by controlling the size of the added weight, while easily reducing the vibration of the bridge made of steel It is to provide a vibration and noise reduction device for steel that can also reduce noise.

The present invention to achieve the above technical problem

The present invention provides a weight adding means (100,400) is installed to reduce the vibration and noise of the steel bridge in the steel bridge for the bridge, the weight adding means is installed to be detachable to the steel bridge as a closed box body (110,410) In the box body, the weight additives 130 and 430 in a liquid state added to the box body weight are further filled.

As a result, the closed box body provided with the weight additive in the liquid state filled therein can enhance the vibration reduction effect of the steel bridge due to the increase in self weight, and the liquid as the weight additive has the function of absorbing noise. In total, the vibration and noise of the steel bridge can be reduced.

In addition, the weight adding means 100 is further provided with a supporting means for weight adding means 300 is accommodated and mounted to the closed box body on the steel bridge, the support means for the weight adding means 300 and the weight adding means 100 ) So as to be detachable to the steel bridge, the weight adding means 100 is to be detachable to the steel bridge by a closed box body further formed with a protrusion receiving groove 440 is formed to fit into the protrusion including the rib of the steel bridge. It was.

As a result, the weight adding means of the present invention can be installed to be detachable to the steel bridge, so as to greatly improve the usability of the installation in the new or existing steel bridge and to make the installation very easy.

In the steel bridges of certain specifications presented on various road bridges by the noise or vibration reduction device for the bridge which can be detached according to the present invention, the construction can be performed quickly by installing the weight-adding means that are manufactured in advance, and the detachment is possible. It can be charged separately so that it can be installed according to various bridge construction types, and it is easy to install and it is easy to replace by using a liquid with a high specific gravity, so that the usability can be enhanced and the effect of reducing vibration and noise Will excel.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. Those skilled in the art of the present invention can change and change the technical idea of the present invention in various forms. Accordingly, such improvements and modifications are within the scope of the present invention as long as they are obvious to those skilled in the art.

BRIEF DESCRIPTION OF THE DRAWINGS In order to describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings. Is not limited to the embodiments described below.

Figures 2a, 2b, 2c and 2d shows the first embodiment and the mounting example of the weight addition means of the present invention, Figures 3a to 3d shows the weight addition means and the mounting example of the second embodiment .

First, looking at the example of the weight adding means 100 of the first embodiment according to Figures 2a and 2b,

The weight adding means 100 is composed of a closed box body 110 made of a predetermined size and the weight adding material 130 filled in the closed box body 110.

The closed box body 110 is preferably made of a plastic material that can freely form the shape and size. In other words, steel bridges are manufactured in various shapes and sizes according to the manufacturing method. In order to increase the applicability or usability according to these shapes and sizes, the steel bridges may be manufactured in a closed box body 110 in a standard shape and size, while the manufacturing is performed. It should be easy.

Therefore, when manufacturing the closed box body 110 of plastic material by injection molding or the like it is possible to easily meet these requirements.

However, the closed box body 110 of the present invention does not exclude the closed box body made of steel other than the plastic material.

Although FIG. 2A illustrates a closed box body 110 having a rectangular shape, it may be manufactured in various cross-sectional shapes.

In addition, such a closed box body 110 may be determined to be easy to transport and construction even in the length of its formation, so that a plurality of closed box bodies 110 can be assembled by assembling with each other, thereby improving field workability.

That is, the ends of the closed box body 110 made of plastic material are formed with convex and / or concave and convex portions so that the two closed box bodies 110 are connected to each other by the concave and convex portions A. By installing the bolt 111 and the fastening nut 112 penetrating the concave-convex portion to complement this connection, a plurality of closed box body 110 may be assembled and combined with each other, in other ways Connection is also possible.

The injection box 120 is further installed in the closed box body 110. The injection hole may be installed in the form of a tube protruding from the closed box body 110 together when the closed box body 110 is manufactured, or may be formed by forming a simple through hole.

The injection hole 120 is to allow the additional liquid weight additive 130 is further filled in the closed box body 110.

The injection hole 120 is to be at least one can be formed in the closed box body 110, but may be installed in accordance with the cross-sectional size and length, a stopper 121 that can close the injection hole 120 ) Can be further formed. In addition, the inlet 120 may be used as the outlet of the weight additive 130, if necessary, at least two or more are preferably installed.

As a result, the closed box body 110 of the present invention in which the injection hole 120 is formed may primarily increase its own weight of the steel by its total weight, and the closed box body 110 may be formed at least in the steel material. It is installed in one or more places so that it can resist vibration generated in steel as its own weight.

As the weight material filled through the injection hole 120, in the present invention, the weight additional material 130 in the liquid state having a large specific gravity in the liquid state is filled.

For example, the weight additive 130 may be manufactured in the form of the antifreeze is added. Most easily, a mixture of water and antifreeze may be used as the weight additive.

Water has the advantage that it is the most economical and relatively large weight (specific gravity) per cross-sectional volume without corroding the inside of the closed box body 110 of plastic material, it is also easy to obtain around. Thus, the weight additive 130 mixed with the antifreeze and water needs to form a closed box 110 so as not to leak from the inside to the outside, so that the inside and / of the closed box 110 Or it is preferable to further form the coating material of the figure or the thermal insulation not shown on the outside, this coating material may additionally have a function to protect the closed box body 110 from the outside closed box body 110 ) Durability can be improved.

In this case, since the water may freeze when the temperature decreases, such as winter, the water is mixed with the antifreeze.

As a result, the weight additive 130 may play a role that can increase the weight of the closed box body 110 to prevent vibration of the steel bridge, and the weight additive 130 in the liquid state. ) Serves to reduce noise generated in steel bridges.

That is, the noise generated as the vehicle passes through the steel bridge may have the effect of being absorbed by the weight additive 130 in the liquid state, so that the closed box body 110 filled with the weight additive 130 of the present invention. Noise can be reduced along with the vibration of the steel bridge.

Next, look at the mounting example of the weight adding means 100 of the first embodiment according to Figures 2c and 2d, in particular look at the example installed on the plate steel girder 200 in the steel bridge.

The plate steel girder 200 is composed of an upper flange 210, an abdomen 220, and a lower flange 230 by processing a steel plate to be referred to as a steel girder for a steel bridge formed to have an overall I-shaped cross section. Can be.

When the plate steel girder 200 has an upper flange 210, a predetermined space is formed on both sides of the abdomen 220 and both upper surfaces of the lower flange 230, and the weight adding means 100 of the present invention may be installed. In the present invention, both sides of the abdomen 220, the lower flange 230 will be described on the basis of the case installed on both upper surfaces.

First, the support means 300 for the weight adding means that serves as a kind of pedestal so as to continue in both longitudinal direction of the plate steel girder 200.

L-shaped pedestal 310 may be used as the support means 300 for the weight adding means.

That is, the L-shaped pedestal 310 is installed to be detachable by fasteners 320 including bolts at the central portion of both abdomen outline of the plate steel girder 200.

The lower part of the weight-adding means 100 of the present invention is inserted and accommodated in the space of the inner side of the L-shaped pedestal 310 and both abdomen outer sides of the plate steel girder 200, but according to the installation length L It is to be assembled and coupled to each other continuously in the female pedestal.

That is, the weight adding means 100 and the support means for weight adding means 300 of the present invention can be installed to be detachable to the plate steel girder 200, so that the workability or workability can be greatly improved.

The weight adding means 100 installed as described above allows the predetermined weight adding agent 130 to be injected through the injection hole 120 so that the installation of the weight adding means 100 of the present invention can be simply completed. .

In the case of Figure 2d the support means for the weight addition means 300, which is also the L-shaped pedestal 310 is installed on both upper surfaces of the lower flange 230 of the plate steel girder 200, the L-shaped pedestal 310 The case in which the weight adding means 100 is inserted and accommodated therein.

At this time, the supporting means 300 for the weight adding means may be installed in various forms other than the L-shaped pedestal, in the present invention, if the weight adding means 100 serves as a pedestal to be removable It is considered to be included in the support means 300 for the means.

As a result, the weight adding means 100 and the supporting means for weight adding means 300 adjust the cross-sectional shape and size, and the number of installations as long as the space that can be accommodated in the plate steel girder 200 allows. Vibration and noise reduction can be made possible.

3A illustrates a weight adding means 400 according to a second embodiment of the present invention, wherein the weight adding means 400 is a weight-adding material filled therein as a closed box body 410 manufactured to a predetermined size. It is configured as 430 is the same as the first embodiment, but in the installation is to be further formed in the protrusion receiving groove 440 to facilitate the installation in particular inside the steel box girders.

That is, the weight adding means 400 is manufactured as a closed box body 410 manufactured to a predetermined size, and the weight adding material 430 having a large specific gravity in the liquid state is formed therein by the injection hole 420 therein. Filling is the same as Example 1, in particular, it can be seen as a modification for installing inside the steel box girder 500 is formed a relatively large internal space.

That is, as shown in FIG. 3d, the steel box girder 500 is a closed box-shaped tubular box body formed with an empty space therein, and a plurality of rib-shaped reinforcement members 510 are provided in the box girder to increase its rigidity. Is installed.

Such a reinforcing material 510 is usually installed to protrude a plurality at a predetermined interval inside the steel box girder 500, the weight adding means 400 according to the second embodiment is a longitudinal rib of the protruding steel box girder By inserting the projection receiving groove 440 into the weight adding means 400 is to be installed to be detachable to the inside of the strong box girder 500 naturally.

As a result, as in Embodiment 1, there is an advantage that it is not necessary to additionally install the supporting means 300 for the additional weight adding means.

The weight adding means 400 in which the protrusion accommodating groove 440 is formed has an advantage of being installed so as to overlap vertically as shown in FIGS. 3A, 3C, and 3D.

That is, the protrusion receiving groove 440 is to be formed in the concave groove on the lower surface of the weight adding means 400, the upper surface when the weight adding means 400 is formed in the convex shape, overlapping up and down It is to be coupled to each other so that a plurality of can be connected to each other and installed.

Since the protrusion accommodating groove 440 additionally forms a recessed groove, the protrusion accommodating groove 440 may reflect the noise generated in the steel box girder 500 and thus may function more effectively in reducing noise. It can also act as a reinforcement to increase the rigidity of the car.

Accordingly, when the worker moves inside the strong box girder 500, the closed box body 410 may be prevented from being damaged due to bright working.

In addition, the protrusion receiving groove 440 of the closed box body 410 according to the second embodiment has an increased mechanical adhesive force on the rib protruding by the fastening rod 460 and the fastening nut 450 as shown in FIG. The weight adding means 400 composed of the closed box body 410 can be more firmly installed inside the steel box girder.

Furthermore, when installing the closed box body 410 overlapping with the upper and lower as shown in Figure 3c, when installing the connection portion using the fastening rod 460 and the fastening nut 450, it is overlapped with the upper, lower, etc. The closed box body 410 may be effectively assembled and combined with each other.

The weight adding means 400 according to the second embodiment is inserted into the place where the rib is installed inside the steel box, so that the detachment becomes more free, and the number of the installation may be adjusted by adjusting the number of installation and the extension length.

Looking at the steel bridge vibration or noise reduction method of the present invention by Example 1 and Example 2 described above.

First, the weight adding means 100 of the first embodiment is any portion of the L-shaped pedestal 310 to the steel plate girder 200 as the support means 300 for the weight adding means to the steel plate girder 200 in the pre-installed state Installed in the L-shaped pedestal 310 to accommodate the pre-fabricated closed box body 110.

At this time, the L-shaped pedestal 310 may be continuously installed according to the extension length of the steel plate girder 200, but can be installed in succession to the L-shaped pedestal 310 spaced apart from each other, the closed box body 110 According to the extension length of the installed L-shaped pedestal 310 can be assembled to each other by assembling a plurality of closed box body 110 in the longitudinal direction.

Since each of the plurality of closed box body 110 is provided with an injection hole 120, through the injection hole 120 to further fill the weight additive 130 of a large liquid state in advance, the closed box body 110 is installed first, it is also possible to further charge the weight additive 130 through the inlet (120). The injection hole 120 to maintain the closed state by the end cap 121.

In addition, when the filling amount of the weight additive 130 is adjusted, since the required weight can be adjusted regardless of the size of the closed box body 110, the filling amount can be arbitrarily determined.

In addition, when maintenance of the weight additional member 130 or the closed box body 110 is required to remove it from the plate steel girder so that it can be replaced with a new weight additional member 130 or closed box body 110. . Accordingly, the weight adding means 100 of the present invention is very easy to manufacture, transport, install and maintain the desorption freely, in the case of a new bridge, the weight adding material 130 is pre-filled or not closed After the box body 110 is installed on the steel plate girder 200, the steel plate girder 200 is installed on the lower bridge structure such as a pier, and then the weight additive 130 is additionally filled in various ways. You can adjust the installation status.

Next, first, the weight adding means 400 of the second embodiment is simply closed by fitting the projection receiving groove 440 into the rib 510 formed inside the steel box girder 500 in a pre-installed state. In the state in which the 410 is installed, the weight adding means 400 is filled by filling the weight adding material 430 having a large specific gravity therein through the inlet 420 of the closed box body 410. Allow this to be installed.

Of course, the weight additional material 430 may be selectively filled before and after the installation of the closed box body 410, the inlet is closed by the end cap is the same as in Example 1 above, Since it is installed to be detachably attached to the new or old steel box girder is the same as the installation method according to the first embodiment.

Furthermore, the weight adding means (100,400) of the present invention introduced only the case that is installed in the girder in the steel bridge, but such weight adding means (100,400) may be installed on the bottom of the bridge bottom plate, such as steel constituting the steel bridge, not the girder of the steel bridge. .

1A, 1B and 1C show a noise or vibration reduction device applied to a conventional bridge.

Figures 2a, 2b, 2c and 2d shows an embodiment and mounting example of the removable noise or vibration reducing device according to the first embodiment of the present invention.

3A, 3B, 3C, and 3D show another embodiment and mounting example of a detachable bridge noise or vibration reducing device according to Embodiment 2 of the present invention.

<Description of the symbols for the main parts of the drawings>

100,400: weight addition means 110,410: closed box body

130,430: Weight addition material 300: Support means for the weight addition means

Claims (10)

In the steel bridge for bridges as a weight addition means is installed to reduce the vibration and noise of the steel bridge, The weight adding means is a closed box body installed to be detachable to the steel bridge, the weight of the additional weight of the liquid state is further filled in the closed box body, The weight adding means is formed by the concave and concave portions (A) of the end of the closed box body 110 in order to adjust the number of one or more by assembling a plurality of plastic closed box body by combining The two closed box body 110 is connected to each other by the uneven portion (A), while installing a plurality of closed box body 110 by installing the bolt 111 and the fastening nut 112 passing through the uneven portion. ) Can be assembled and combined with each other, The weight adding means is installed on the steel bridge by means of supporting means for the weight adding means including a pedestal that is mounted to receive the closed box body is installed so that the support means and weight adding means for the weight adding means detachable to the steel bridge, The supporting means for the weight adding means is to be formed as a protrusion receiving groove so that the steel box girder in the closed box shape is used to be fitted and fixed to the longitudinal rib-shaped reinforcement protruding inside the steel box girder. Removable noise or vibration reduction device for steel bridges. delete delete delete 2. The detachable steel bridge noise or vibration reduction device according to claim 1, wherein the closed box body further includes an injection hole for weight addition material. 2. The detachable steel bridge noise or vibration reducing device according to claim 1, wherein the weight adding means is formed of a weight adding material including an antifreeze inside the closed box body made of plastic. delete delete delete delete

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