KR100783245B1 - Bridge bearing with elastic pillars - Google Patents

Abstract

A bridge bearing having plural elastic columns is provided to allow horizontal movement of an upper structure and to support a negative reaction while supplying horizontal restoring force. A bridge bearing(100) having plural elastic columns for supporting load of an upper structure and allowing horizontal movement, and then restoring between a pier and an upper structure(20) of a bridge includes a lower plate(110) fixed on a pier(10) with a nut(111) and a bolt(112) and provided with a pin hole(114) and arm portions(116) to install elastic columns, an upper plate(130) fixed to the bottom of the upper structure of the bridge, provided with arm portions(132) and a projection(134) to fix to the bottom of the upper structure and attached with a stainless steel plate(136) to reduce frictional force against the top of an intermediate member, an elastic bearing(150) installed at the top center of the lower plate to support the load of the upper structure elastically in the vertical direction and to allow the upper structure to be inclined in one direction and provided with a through hole(152) to penetrate a pin(160), an intermediate member(140) loaded on the elastic bearing and fixed with the pin inserted to the pin hole of the lower plate via the through hole of the elastic bearing to limit the horizontal movement of the intermediate member and the elastic bearing against the lower plate and a PTFE plate(142) to make a sliding motion with the stainless steel plate smoothly, plural elastic columns(120) supplying restoring force to make the upper plate and the upper structure restored to the original location if the upper plate and the upper structure make a horizontal movement against the lower plate by connecting the arm portions of the lower plate and the arm portions of the upper plate and attached with metal plates(122) at the top and bottom to be fixed to the lower plate and the upper plate with bolts(124), and a fall prevention projection(170) installed to the bottom of the upper plate, placed at an allowable distance from the intermediate member and suspended on the side of the intermediate member if the relative horizontal movement of the upper plate against the lower plate exceeds the allowable distance to prevent the upper structure of the bridge installed on the upper plate from falling down.

Description

Bridge device with a plurality of elastic pillars {Bridge bearing with elastic pillars}

1 is a cross-sectional view of a bridge,

2 is a plan sectional view of a horizontal resilient elastic body,

3 is a cross-sectional view of a teaching device having a plurality of elastic columns according to the present invention,

4 is a cross-sectional view taken along line II of FIG. 3;

5 is a cross-sectional view showing a modification of FIG.

6 is a cross-sectional view according to J-J of FIG.

7 is a cross-sectional view showing another example of a stapling device having a plurality of elastic pillars according to the present invention;

8 and 9 are a plan sectional view showing a modification of FIG.

10 is a cross-sectional view showing another example of the teaching apparatus according to the present invention;

11 is a cross-sectional view showing yet another example of the teaching apparatus according to the present invention;

12 is a graph showing the relationship between shear strain and shear stress according to the hardness of polyurethane.

Explanation of symbols on the main parts of the drawings

110: lower plate 120: elastic column

130: upper plate 140, 140a, 140b: intermediate member

150, 150b: elastic support 160: pin

170: optimism prevention

The present invention relates to a bridge device, and more particularly, to a bridge device installed between the bridge pier and the upper structure to support the load of the upper structure while allowing the horizontal movement and restore the function again.

In order to provide horizontal restoring force to the bridge system, an elastic body should be installed between the components installed in the piers and the components installed in the superstructure. The installation method of the elastic body varies depending on the type or type of the chair device, the installation position, the type of the elastic body, and the form of the component.

In the conventional teaching apparatus, the components installed on the pier and the components installed on the upper structure face each other and provide horizontal restoring force by horizontally installing an elastic body between the two components facing each other.

In such a conventional teaching device, since only one elastic body restores an action according to a direction in which the horizontal force is applied, the lifespan of each elastic body and related components may vary.

In addition, when the elastic body is installed horizontally, it can provide a large horizontal restoring force, but a separate structure for catching the side reaction force should be provided.

Accordingly, it is necessary to develop a device that can connect the components connected to the upper structure and the parts connected to the piers up and down to catch the side reaction force, and the restoring force can be uniformly applied to the entire elastic body regardless of the direction of the horizontal force. .

In this case, referring to Figure 1, by connecting a structure such as the upper plate 42 and the lower plate of the device 40 to the horizontal restoring elastic body 44 in the manner of connecting the entire part installed between the upper plate and the lower plate It may be conceivable to install an elastic body in a surrounding form, but this has a problem in that the entire lower plate and the upper plate 42 of the chair apparatus must be made very large.

There is a problem in that it is difficult to install the bridge device 40 because the top plate 42 of the bridge device 40 becomes larger than the width of the girder 30 supporting the top plate 20 by placing the bridge 10 on the bridge.

In addition, any one of the direction of the arrow by the horizontal displacement of the superstructure in the state that the elastic body 44 for providing a horizontal restoring force is composed of a large cylinder surrounding the entire part installed between the lower plate and the upper plate as shown in FIG. In the case of inclination toward the side, slippage occurs at a small thickness on both the left and right sides of the inclination direction, but slippage occurs at a large thickness on both sides before and after the inclination direction. Accordingly, there is a problem that a large difference in the force to resist the shear force according to the position of the elastic body, and thus the elastic body is easily broken, it is inappropriate to be applied to the teaching device.

In addition, since the elastic body that provides the horizontal restoring force is composed of a cylindrical shape surrounding the entire part, the restraint device must also be formed in a circular shape as a whole, and the entire circumference must be attached to the upper plate and the lower plate, which takes a lot of time and a lot of parts. The problem is that it is not appropriate.

In the conventional bridge apparatus, when a large seismic force is applied to the bridge in the horizontal direction, the upper plate may be separated and the upper structure of the bridge may be broken.

It is an object of the present invention to provide a scaffolding device having a horizontal restoring force capable of holding a negative reaction force and making it small in size.

Another object of the present invention is to provide a teaching device having a horizontal restoring force and less fear of falling.

Still another object of the present invention is to provide a teaching device that can be manufactured in various forms while having a horizontal restoring force and easy to install.

A bridge device having a plurality of elastic pillars according to the present invention includes a lower plate fixed on a bridge pier, an upper plate fixed to a lower surface of the upper structure of the bridge, disposed between the lower plate and the upper plate, and lifting up and down the load of the upper structure. An elastic support that elastically supports in a direction, and is disposed between the elastic support and the upper plate or between the elastic support and the lower plate so as to move horizontally with respect to any one of the lower plate and the upper plate disposed opposite to the elastic support. In this limited state, the other one is disposed at intervals with the intermediate member and the intermediate member to allow horizontal movement, and is installed at intervals along the circumference of the intermediate member, respectively, one side of the lower plate and one side of the upper plate, respectively. Horizontal restoring force due to the relative horizontal movement between the lower plate and the upper plate Has a configuration comprising a plurality of elastic pillars to provide.

The upper plate or the lower plate is disposed at intervals as much as the allowable distance between the intermediate member and when the relative horizontal movement between the lower plate and the upper plate exceeds the allowable distance, the intermediate member is caught by the intermediate member. It is preferable that the fall prevention jaw is installed to prevent the upper structure from falling.

The elastic column is preferably made of an elastic body having a hardness of 75A ~ 85A.

More preferably, the elastic body is a polyurethane having a hardness of 75A to 85A.

The upper plate or the lower plate has two or more arms protruding from the side, the elastic column is preferably installed through the arm.

The elastic support is a polyurethane disk formed side grooves along the circumferential surface,

Pin holes are formed in the lower plate or the upper plate,

The intermediate member may have a configuration in which a pin is inserted into the pin hole through the polyurethane disc such that the intermediate member is limited in horizontal movement with respect to any one of the lower plate and the upper plate.

The lower plate or the upper plate is formed with a first elastic body receiving groove or a first projection facing the intermediate member, the first elastic body receiving groove or the intermediate member of the surface facing the first projection is the first elastic body receiving groove A second projection inserted into the second elastic member receiving groove is formed or the first projection is formed,

The elastic support may have a composition that is a rubber elastic body having a metal border and disposed between the first elastic body receiving groove and the second protrusion or between the second elastic body receiving groove and the first protrusion.

A first linear groove or a first linear protrusion is formed in a member allowing the intermediate member to move among the upper plate and the lower plate, and a second linear protrusion or the first linear protrusion inserted into the first linear groove in the intermediate member. It may have a configuration in which a second straight groove is inserted into which the straight projection is inserted.

By the static load of the upper structure, the elastic column may be installed in a state in which the elastic pillar is stretched by a thickness to be contracted.

It is preferable that a flange is formed between the arm portion and the arm portion to protrude to the side smaller than the arm portion and the fastening hole is formed in the vertical direction.

It is preferable that an upper protrusion is formed on the upper surface of the upper plate to fix the lower surface of the upper structure.

In some cases, a bridge device having a plurality of elastic pillars according to the present invention is fixed on the bridge pier and the lower plate is formed on the upper surface of the first spherical groove or the first spherical projection, fixed to the bottom of the upper structure of the bridge It is provided between the upper plate, the upper plate and the lower plate and has a second spherical protrusion coupled to the first spherical groove or a second spherical groove coupled to the first spherical protrusion on the bottom thereof so that the horizontal movement is possible with respect to the lower plate. In the limited state, the upper plate is disposed at intervals with the intermediate member and the intermediate member to allow horizontal movement, and is installed at intervals along the circumference of the intermediate member so that one side of the lower plate and one side of the upper plate are respectively. And a plurality of elastic pillars connected to each other and providing a horizontal restoring force according to a relative horizontal movement between the lower plate and the upper plate. Can lose.

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

Figure 3 is a cross-sectional view of the bridge device having a plurality of elastic columns according to the present invention, Figure 4 is a cross-sectional view according to I-I of FIG.

As shown in FIGS. 3 and 4, the teaching apparatus 100 according to the present invention includes a lower plate 110. The lower plate 110 is fixedly installed on the piers 10 through the base nut 111 and the bolt 112 and the like, and has a pin hole 114 in the center thereof. The lower plate 110 has arm portions 116 protruding from all sides. These arm portions 116 are portions where the elastic columns 120 are installed. When forming the arm portion 116 in this way, the overall width of the lower plate 110 is reduced and the material required to manufacture the lower plate 110 is saved. A flange 117 is formed between each arm portion 116 and the arm portion 116 to protrude to the side smaller than the arm portion and the fastening hole 119 is formed in the vertical direction. The bolt 112 is coupled to the base nut 111 through the fastening hole 119 of the flange 117.

The device 100 according to the present invention includes a top plate 130. The upper plate 130 is fixed to the lower surface of the upper structure of the bridge, which is also provided with arm portions 132 in a position corresponding to the lower plate 110, the arm portion 132 is the lower plate 110 ). The upper surface of the upper plate 130 is formed with a protrusion 134 for fixing to the bottom of the upper structure 20 by welding or the like. The stainless steel plate 136 is attached to the bottom of the top plate 130. This is to reduce the frictional force with the upper surface of the intermediate member 140 described later.

As shown, the elastic base 150 is installed at the center of the upper surface of the lower plate 110. The elastic support 150 is a polyurethane disk having a side groove is suitable, the through-hole 152 through which the pin 160 can pass is formed in the center. The elastic support 150 serves to elastically support the load of the upper structure 20 in the vertical direction, and allows the upper structure to tilt in any one direction.

The intermediate member 140 is mounted on the elastic bearing 150. Pin 160 is fixed to the bottom of the intermediate member 140, the pin 160 is inserted into the pin hole 114 of the lower plate 110 through the through hole 152 of the elastic support 150 have. Accordingly, the intermediate member 140 and the elastic support 150 is limited in the horizontal direction relative to the lower plate (110). On the upper surface of the intermediate member 140, a PFT plate 142 (PTFE plate) is provided. The PFT plate 142 is to enable a smooth sliding movement with the stainless steel plate 136 attached to the bottom surface of the top plate 130. That is, the intermediate member 140 allows the horizontal movement of the upper plate 130.

The device 100 according to the present invention includes a plurality of elastic columns 120. The elastic column 120 connects the arm 116 of the lower plate 110 and the arm 132 of the upper plate 130, respectively, and the upper structure 20 on the upper plate 130 and the upper plate 130 by an earthquake or the like. ) Is moved horizontally with respect to the lower plate 110, serves to provide a restoring force so that the upper plate 130 and the upper structure 20 can be restored to its original position. In this embodiment, the elastic column 120 is disposed at intervals with the intermediate member 140 and four are provided at intervals along the circumference of the intermediate member 140. The elastic column 120 is a portion of one aspect of the present invention, but a circular cross-section is suitable, a square cross-section, hexagonal cross section, octagonal cross section, etc. can be used, of course. The upper and lower surfaces of the elastic column 120 as described above is attached to the metal plate 122, the metal plate 122 is fixed to the lower plate 110 and the upper plate 130 through the bolt 124 to the elastic column 120 ) Is installed. Of course, other fixing methods such as welding can be used. The elastic column 120 is preferably installed by tensioning the elastic column 120 by the thickness of the elastic support 150 is contracted by the static load of the upper structure (20). That is, the chair device 100 is installed and is in a tensioned or uncompressed state under static load, and even if the upper structure 20 moves only a little horizontally, restoring force can be immediately applied.

As the elastic column 120 described above, a spring polyurethane having a large elasticity and a high hardness is preferable than general rubber. More preferably, the elastic column 120 has a hardness of about 75A to 85A as measured by a durometer A. This is described in more detail later.

As shown, the top of the top plate 130 is installed on the fall prevention jaw 170. The fall prevention barrier 170 is disposed at an interval as much as the allowable distance between the intermediate member 140 and the intermediate member 140 when the relative horizontal movement of the upper plate 130 relative to the lower plate 110 exceeds the allowable distance. It takes a role of preventing the upper structure 20 of the bridge installed on the upper plate 130 to fall off.

FIG. 5 is a cross-sectional view illustrating a modified example of FIG. 3, and FIG. 6 is a short cut along J-J of FIG. 5.

As shown in FIG. 5, a first guide part 144 having a first linear protrusion shape is formed on an upper surface of the intermediate member 140, and the first guide part 144 is coupled to a bottom surface of the upper plate 130 to form one direction. The second guide portion 138 in the form of a second linear groove that can be moved along may be formed to allow the intermediate member 140 to be moved in only one direction with respect to the top plate 130. In some cases, a guide portion having a first linear groove shape may be formed on the upper surface of the intermediate member 140, and a second guide portion having a second linear protrusion shape may be formed on the bottom surface of the upper plate 130.

In some cases, a flange 117a for fastening to the base nut 111 may be formed on the lower side of the lower plate 110, and the bolt 112 may be fastened to the base nut 112 through the flange 117a. The hole device 100 can be drilled in the lower plate 110 so as to configure the chair apparatus 100. The rest is as described with reference to FIGS. 3 and 4.

7 is a cross-sectional view showing another example of a stapling device having a plurality of elastic pillars according to the present invention.

In some cases, the pin hole 133 is formed in the upper plate 130 of FIG. 3, the elastic support 150 is disposed on the bottom surface of the upper plate 130, and the pins 160 protrude upward. The intermediate member 140 is disposed below the elastic support 150 so that the intermediate member 140 and the elastic support 150 are restricted in the horizontal direction with respect to the upper plate 130, and with respect to the lower plate 110. It may be allowed to allow relative sliding movements. At this time, the fall prevention jaw 170 is installed at intervals with the intermediate member 140 on the upper surface of the lower plate (110). The rest is as described with reference to FIGS. 3 and 4.

8 and 9 are plan cross-sectional views illustrating a modification of FIG. 4.

As shown in FIG. 8, the lower plate 110 and the like may be formed in a circular shape, and eight chairs 102 may be provided at intervals of the elastic pillars 120, and the lower plate 110 may be configured as shown in FIG. 9. 110, the elastic support 150a, the intermediate member and the like may be formed in a quadrangle, and the posture device 104 may be configured by installing the elastic pillars 120 on both sides of the intermediate member, respectively. The upper plate is also preferably configured in the same plane shape as the lower plate 110.

10 is a cross-sectional view showing still another example of the teaching apparatus according to the present invention.

As shown in the drawing, a first protrusion 146 is formed on the bottom surface of the intermediate member 140a and a second elastic body receiving groove 113 facing the intermediate member 140a is formed on the lower plate 110. The protrusion 146 may be inserted, and the pedestal device 106 may be configured in a port form by mounting the elastic support 150b in the second elastic body receiving groove 113. In this case, the chair device may be configured by using the elastic support 150b as a rubber elastic body in which a metal ring is disposed along the upper edge between the first elastic body receiving groove 113 and the first protrusion 146.

In addition, in some cases, the first elastic receiving groove may be formed on the bottom surface of the intermediate member 140a, and the second projection toward the intermediate member 140a may be formed on the lower plate 110 to configure the chair apparatus.

Here, the elastic column 120 is also preferably made of polyurethane used for the spring, the hardness is more preferably 75A to 85A. The rest is the same as described with reference to FIGS. 3 and 4.

11 is a cross-sectional view showing still another example of the teaching apparatus according to the present invention.

As shown, the first spherical protrusion 146a is formed on the bottom surface of the intermediate member 140b and the second spherical groove 113a is formed on the lower plate 110 to rotate the upper structure 20. While allowing the lower plate 110 can be configured to the bridge device 108 to limit the movement in the horizontal direction. In this case, it can be configured without the elastic bearing. In some cases, instead of the first spherical protrusion 146a in the intermediate member 140b, a first spherical groove may be formed, and a second spherical protrusion may be formed on the upper surface of the lower plate 110, and installed in an inverted state. You may also do it. The rest is the same as described with reference to FIGS. 3 and 4.

As a result of the present inventor's examination of the above-described teaching apparatus, the ductility is too large when the total number of steps is 24 kg / cm 2 or less, so that it has a predetermined size such as PC beam (usually 660 mm) or steel box (1,000 mm). It is not suitable for use as the elastic body of the present invention because the size is too large for use, the allowable horizontal distance is too large, and the restorability is low, and when the shearing number is more than 55㎏ / ㎠, the material is inflexible and easily permanent. Deformation or damage was found to be unsuitable for use as the elastic body of the present invention.

That is, the elastic body for providing a horizontal restoring force may be used in the range of 24 ~ 55㎏ / ㎠ the number of steps.

And preferably the shear modulus of the elastic body is 35 ~ 45kg / ㎠, more preferably about 40kg / ㎠.

In the case of applying a polyurethane having a shear capacity of 40 kg / cm 2 to the present invention in a device having a capacity of 200 tons, the dead load is 120 tons, the live load is 80 tons, the maximum allowable displacement is always ± 50 cm, and the maximum allowable displacement during an earthquake. The area of the elastic column made of polyurethane used in the case of ± 50cm in addition to the maximum allowable displacement is as follows.

The device is

0.5 × d _i × K> W / 80 ---- Equation 1) must be satisfied.

In equation 1), d _i is the displacement during the earthquake, W is the dead load, and K is the shear stiffness.

Substituting the above values into Equation 1),

0.5 x 50 x K > 120/80, and K must be greater than 0.6 ton / cm.

When the shear modulus G is about 40㎏ / ㎠ = 0.040ton / ㎠, the horizontal displacement is 50% of the height T of the polyurethane and the horizontal displacement of the earthquake is about 100% of T.

When the height T of the polyurethane is 10 cm, the equation for obtaining the shear stiffness of the polyurethane,

K _p = G · A / T ----- Substituting into Equation 1),

0.6 = (0.040 × ((π × D ² ) / 4)) / 10

D = 13.8 cm. If you want to use it divided into four, the diameter is about 6.9cm. It is large enough to be used in a 200-ton capacity chair.

In the same way as above, when the capacity of the teaching device is 500 ton and 1000 ton, D is 21.85 cm and 30.9 cm, respectively, and when it is divided into four, about 10.9 cm and 15.45 cm are used. Should be. This is also the size that can be used properly by installing in the 500 to 1000 tons of bridge system.

Next, in the case of a 12 ton / cm2 of less than 30 kg / cm2 in a teaching device having a capacity of 200 tons, the dead weight is 120 tons, the live load is 80 tons, the maximum allowable displacement is always ± 50 cm, and the maximum during an earthquake. If the permissible displacement is ± 50cm in addition to the maximum permissible displacement at all times, the area of the elastic column of the elastic body having a shear number of 12㎏ / ㎠ is as follows.

Substituting the above values into Equation 1),

0.5 * 50 * K> 120/80, and K = 0.6 ton / cm.

When the height T of the elastic body is 10 cm, the equation for obtaining the shear stiffness,

K _r = G · A / T ----- Substituting into Equation 2),

0.6 = (0.012 × ((π × D ² ) / 4)) / 10

D = 25.2 cm. If you want to use it divided into four, the diameter is about 12.6cm.

In the same way as above, when the capacity of the teaching device is 500 ton and 1000 ton, D is found to be 39.9cm and 56.4cm respectively, and when it is divided into four, about 20cm and 28.2cm in diameter are used. Should be.

Compared to the case of using a polyurethane having a shear number of 40kg / ㎠ described above, it can be seen that the diameter of the previous step is about 2 times compared to the previous one when using a thing of about 12㎏ / ㎠.

12 is a graph showing the relationship between shear strain and shear stress according to the hardness of polyurethane.

Referring to Figure 12 to calculate the shear step,

The shear modulus of polyurethane having a hardness of 55 A is about 80 / 0.8 psi = about 8 kg / cm 2, and the shear modulus of polyurethane having a hardness of 65 A is 160 / 0.8 psi = about 14 kg / cm 2.

If the number of steps is about 14㎏ / ㎠ It is difficult to use because the cross-sectional area of the elastic body that provides a horizontal restoring force compared to the capacity of the chair device is too large.

The shear modulus of polyurethane having a hardness of 75 A is 210 / 0.6 psi = about 24.6 kg / cm 2, and the shear modulus of polyurethane with a hardness of 85 A is 300 / 0.4 psi = about 52.7 kg / cm 2.

From this it can be seen that the polyurethane of about 75A ~ 85A hardness is suitable for use as the elastic column of the present invention. The same applies to other elastic bodies other than polyurethane.

As can be seen from the above description, the chair apparatus according to the present invention can catch the side force with an elastic body that allows horizontal movement of the upper structure and the like and provides horizontal restoring force while providing horizontal restoring force.

By dispersing the elastic body that provides horizontal restoring force in various places in the form of a column, the size of the staircase device can be made small by using a material such as polyurethane having high shear stiffness.

In addition, the size of the horizontal restoring force can be easily adjusted as desired by adjusting the area or the number of installation of the elastic column, and the upper and lower plates can be made in various forms according to the environment of the place where it is installed.

The elastic body providing horizontal restoring force is distributed and installed in several places in the form of column, so that the shear force acting on each elastic column acts uniformly and the entire elastic column is responsible for the restoring force.

The fall prevention jaw is provided to prevent the fall of the upper structure.

It is easy to design because it is easy to calculate the shear stiffness, and it is easy to apply regardless of the type of teaching device such as disc bearing, pot bearing and spherical bearing.

Claims (11)

A bottom plate fixed on the pier of the bridge; An upper plate fixed to a lower surface of the upper structure of the bridge; An elastic support disposed between the lower plate and the upper plate to elastically support the load of the upper structure in the vertical direction; It is disposed between the elastic bearing and the upper plate or between the elastic bearing and the lower plate and horizontal movement with respect to the other one in a state where the horizontal movement is limited to any one of the lower plate and the upper plate disposed opposite the elastic bearing. Intermediate member to allow; And Disposed at intervals with the intermediate member and installed at intervals along the circumference of the intermediate member to connect one side of the lower plate and one side of the upper plate, respectively, and a horizontal restoring force according to a relative horizontal movement between the lower plate and the upper plate; A device having a plurality of elastic pillars, characterized in that it comprises a plurality of elastic columns to provide. The intermediate member of claim 1, wherein the intermediate member is disposed on the upper plate or the lower plate at intervals of the allowable distance from the intermediate member and the relative horizontal movement between the lower plate and the upper plate exceeds the allowable distance. A bridge device having a plurality of elastic pillars, characterized in that the fall prevention jaw is installed to prevent the upper structure of the bridge from falling. According to claim 1, wherein the elastic column is a chair having a plurality of elastic pillars, characterized in that made of an elastic body of hardness 75A ~ 85A. The method of claim 3, wherein the elastic body is a chair having a plurality of elastic pillars, characterized in that the polyurethane of hardness 75A ~ 85A. According to claim 1, wherein the upper plate or the lower plate has two or more arm portions protruding to the side, the elastic device having a plurality of elastic pillars, characterized in that installed through the arm portion. According to claim 1, The elastic bearing is a polyurethane disk formed side grooves along the circumferential surface, Pin holes are formed in the lower plate or the upper plate, The intermediate member is provided with a plurality of elastic, characterized in that the pin is inserted into the pin hole through the polyurethane disk so that the horizontal movement of the intermediate member is limited to any one of the lower plate and the upper plate. A device with a column. According to claim 1, wherein the lower plate or the upper plate is formed with a first elastic body receiving groove or a first projection facing the intermediate member, the first elastic body receiving groove or the intermediate member of the surface facing the first projections A second protrusion inserted into the first elastic body receiving groove or a second elastic body receiving groove into which the first protrusion is inserted is formed, The elastic support is a bridge device having a plurality of elastic pillars, characterized in that the rubber elastic body having a metal border disposed between the first elastic body receiving groove and the second projection or between the second elastic body receiving groove and the first projection. . According to any one of claims 1 to 7, wherein the first member of the upper plate and the lower plate to allow the movement of the intermediate member is formed with a first straight groove or a first straight projection, the intermediate member is the first A second device having a plurality of elastic pillars, characterized in that the second linear projection inserted into the first linear groove or the second linear groove is inserted into the first linear projection. 6. The device as claimed in claim 5, wherein a flange is formed between the arm portion and the arm portion to protrude smaller than the arm portion to the side and a fastening hole is formed in the vertical direction. 6. The device of claim 5, wherein an upper protrusion is formed on an upper surface of the upper plate to fix the lower surface of the upper structure. A lower plate fixed on the bridge piers and having a first spherical groove or a first spherical protrusion formed on an upper surface thereof; An upper plate fixed to a lower surface of the upper structure of the bridge; A state in which horizontal movement is limited to the lower plate provided between the upper plate and the lower plate and having a second spherical protrusion coupled to the first spherical groove on the bottom surface or a second spherical groove coupled to the first spherical protrusion. An intermediate member allowing horizontal movement with respect to the upper plate; And Disposed at intervals with the intermediate member and installed at intervals along the circumference of the intermediate member to connect one side of the lower plate and one side of the upper plate, respectively, and a horizontal restoring force according to a relative horizontal movement between the lower plate and the upper plate; A device having a plurality of elastic pillars, characterized in that it comprises a plurality of elastic columns to provide.

Images