KR102145711B1 - Elastomeric bearing for bridge - Google Patents

Abstract

According to one embodiment of the present invention, a disclosed elastic support for a bridge includes: an upper plate; a lower plate arranged to face the upper plate; a metal panel attached to the lower surface of the upper plate; an elastic pad formed in a rectangular shape and positioned between the upper plate and the lower plate; a fluoride resin panel attached to the upper surface of the elastic pad; a plurality of upper wedges laterally spaced apart from the elastic pad to be attached to the lower surface of the upper plate; and a plurality of lower wedges attached to the upper surface of the lower plate to be adjacent to a side surface of the elastic pad. The sum of each height of the plurality of upper wedges and each height of the plurality of lower wedges can be smaller than the height of the elastic pad. Therefore, the elastic support for a bridge can reduce damage to the bridge in case of earthquakes.

Description

Elastic bearing for bridge{ELASTOMERIC BEARING FOR BRIDGE}

The embodiments disclosed in this document relate to an elastic support for a bridge positioned between the upper structure and the lower structure of the bridge.

Bridge bearings are located at the junction between the upper structure and the lower structure of the bridge, transmit the load transmitted from the upper structure to the lower structure, and protect the bridge structure by adapting to earthquakes, wind speed and temperature changes, and to safely operate the vehicle. will be. Bridge bearings adapt to external loads and absorb the displacement of the bridge according to seasons through expansion and contraction, so that the function of the bridge is smoothly performed by passing through the buffering function of the bridge bearings instead of directly transmitting them to the bridge piers or abutments, which are lower structures. Not only does it last, it can extend the durable life of the bridge.

Elastic bearings, one of the types of bearings for bridges, are typically an upper plate fixed to the upper structure of a bridge, a lower plate facing the upper plate and fixed to the lower structure of the bridge, and a rectangular parallelepiped shape disposed between the upper plate and the lower plate. It may include an elastic pad. The upper surface of the elastic pad may be fixed to the upper plate, and the lower surface of the elastic pad may be fixed to the lower plate. Among the elastic bearings for bridges, the fixed elastic bearing and the one-way movable elastic bearing may include a wedge for limiting movement in the horizontal direction.

The elastic bearing for the bridge needs to be designed to be able to move in the horizontal direction for the movement of the bridge upper plate. When the elastic pad is fixed to the upper plate and the lower plate, movement in the horizontal direction may be possible by deformation of the elastic pad. In this case, it is necessary to increase the height of the elastic pad in order to secure the horizontal displacement. In order to increase the height of the elastic pad, the manufacturing cost may increase, and the weight of the elastic support may increase. In addition, when the elastic pad is deformed, horizontal force due to elasticity is generated, so smooth horizontal movement may be hindered.

On the other hand, when a strong external force threatens the safety of the bridge, such as an earthquake, the upper wedge and lower wedge to limit horizontal movement in the normal elastic bearing may cause excessive horizontal force to be transmitted to the bridge structure and damage the bridge. I can. Accordingly, when a strong external force is generated, a structure capable of mitigating the restriction of movement in the horizontal direction may be required.

Embodiments of the present invention are to provide a structure of an elastic support for a bridge that can secure movement in the horizontal direction and prevent damage to the bridge by strong external force.

The elastic support for a bridge according to an embodiment disclosed in this document is formed of an upper plate, a lower plate disposed to face the upper plate, a metal panel attached to the lower surface of the upper plate, and a rectangular parallelepiped shape, and between the upper plate and the lower plate The elastic pad positioned on the surface, the fluororesin panel attached to the upper surface of the elastic pad, a plurality of upper wedges attached to the lower surface of the upper plate and spaced laterally from the elastic pad, and attached to the upper surface of the lower plate so as to be adjacent to the side of the elastic pad The plurality of lower wedges are formed, and a sum of the heights of each of the plurality of upper wedges and the heights of each of the plurality of lower wedges may be smaller than the height of the elastic pad.

According to an embodiment, an inner surface of each of the plurality of lower wedges and the plurality of upper wedges may be inclined in a direction away from the elastic pad.

According to an embodiment, the plurality of upper wedges may not contact the plurality of lower wedges.

According to an embodiment, the plurality of upper wedges may guide the movement of the upper plate by sliding the metal panel and the fluororesin panel.

According to an embodiment, the plurality of upper wedges may cause a transverse deformation of the elastic pad when a horizontal force is applied to the elastic support for a bridge.

According to an embodiment, the plurality of upper wedges are spaced apart by a first specified distance from the first side of the elastic pad and disposed in parallel with the first side, and the second upper wedge of the elastic pad parallel to the first side. And a second upper wedge spaced from the side by a first designated distance and disposed parallel to the second side, and spaced apart by a second designated distance from the third side of the elastic pad perpendicular to the first side and the second side and A first auxiliary wedge attached to the lower surface of the plate parallel to the third side, and a second designated distance from the fourth side of the elastic pad parallel to the third side and attached parallel to the fourth side to the lower surface of the upper plate A plurality of auxiliary wedges including a second auxiliary wedge are further included, and each of the plurality of auxiliary wedges is disposed to be laterally adjacent to one of the plurality of lower wedges, and a concave portion may be formed at each of the left and right ends. .

According to an embodiment, each of the plurality of auxiliary wedges may include a V-shaped first concave portion formed at a left end and a V-shaped second concave portion formed at a right end.

According to an embodiment, the plurality of upper wedges are spaced apart by a first specified distance from the first side of the elastic pad and disposed in parallel with the first side, and the second side of the elastic pad parallel to the first side. A second upper wedge spaced a first specified distance from and arranged parallel to the second side, the first side and a second specified distance from the third side of the elastic pad perpendicular to the second side and parallel to the third side. And a third upper wedge disposed in such a manner as to be spaced apart from the fourth side of the elastic pad parallel to the third side by a second predetermined distance and disposed parallel to the fourth side.

According to embodiments disclosed in this document, by disposing a metal panel and a fluororesin panel between the upper plate and the elastic pad, and employing an upper wedge that guides the horizontal movement of the upper plate, the height of the elastic pad is not increased. The horizontal movement range can be secured, and the force applied to the bridge due to the deformation of the elastic pad can be reduced.

In addition, by forming the sum of the height of the upper wedge and the height of the lower wedge to be smaller than the height of the elastic pad, when a horizontal force caused by an earthquake is applied to the elastic support, it can absorb the horizontal force through the deformation of the elastic pad to provide a seismic isolation function. .

In addition, by reducing the thickness of the elastic pad, it is possible to reduce the manufacturing cost and weight of the elastic support.

In addition, by employing an auxiliary wedge that can be broken when a strong external force above the designed value is applied to the fixed end, damage to the bridge during an earthquake can be reduced.

In addition to this, various effects that are directly or indirectly identified through this document can be provided.

1 is a plan view, a front view, and a side view of a bidirectional movable elastic support according to an embodiment.
2 shows an example in which a horizontal force is applied to a bidirectional movable elastic support according to an embodiment.
3 is a plan view, a front view, and a side view of a one-way movable elastic support according to an embodiment.
4 shows an example in which a horizontal force is applied to a one-way movable elastic support according to an embodiment.
5 is a plan view, a front view, and a side view of a one-way fixed elastic support according to an embodiment.
6 shows an example in which a horizontal force is applied to a one-way fixed elastic support according to an embodiment.
7 is a plan view, a front view, and a side view of a two-way fixed elastic support according to an embodiment.
8 illustrates an example in which a horizontal force is applied to a bidirectional fixed elastic support according to an embodiment.
In connection with the description of the drawings, the same or similar reference numerals may be used for the same or similar components.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood as including various modifications, equivalents or substitutes of the embodiments of the present invention. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with an understanding of an embodiment of the present invention, a detailed description thereof will be omitted.

1 is a plan view, a front view, and a side view of a bidirectional movable elastic support according to an embodiment. In the plan view of FIG. 1, for convenience of explanation, the right side of the upper plate is omitted to show a bidirectional movable elastic support.

Referring to FIG. 1, a bidirectional movable elastic support 100 according to an embodiment includes an upper plate 110, a metal panel 110, an elastic pad 130, a fluororesin panel 140, and a plurality of upper wedges ( 150), a lower plate 170 and a plurality of lower wedges 180 may be included. The two-way movable elastic support 100 may be configured to accommodate movement in the orthogonal direction of the orthogonal axis.

The upper plate 110 may be formed in a plate shape. The upper plate 110 may be formed in a square or rectangular shape, or may be formed in any other shape. The upper plate 110 may be made of a metal material.

The metal panel 110 may be attached to the lower surface of the upper plate 110. The metal panel 110 may be made of, for example, stainless steel. The metal panel 110 may have a smaller rectangular shape than the upper plate 110.

The elastic pad 130 may be positioned between the upper plate 110 and the lower plate 170. The elastic pad 130 may be disposed between, for example, a plurality of upper wedges 150 and a plurality of lower wedges 180. The elastic pad 130 may be formed in a rectangular parallelepiped shape. The elastic pad 130 may be made of a rubber material. The elastic pad 130 may have a structure in which a rubber material and a metal plate material are alternately stacked.

The fluororesin panel 140 may be attached to the upper surface of the elastic pad 130. The fluororesin panel 140 may be made of, for example, PTFE (Polytetrafluoroethylene). The fluororesin panel 140 may have a rectangular shape. A plurality of concave portions may be formed on the upper surface of the fluororesin panel 140. When the metal panel 110 and the fluororesin panel 140 are in contact, the metal panel 110 and the fluororesin panel 140 slide to move the upper plate 110 or the lower plate 170 in both directions, and elasticity The support 100 may function in a bidirectional movable type.

The plurality of upper wedges 150 may be attached to the lower surface of the upper plate 110. The plurality of upper wedges 150 may be fixed to the lower surface of the upper plate 110 by welding. Each of the plurality of upper wedges 150 may be disposed to be spaced laterally from the elastic pad 130. The plurality of upper wedges 150 may protrude downward from the upper plate 110. The plurality of upper wedges 150 may have a rectangular shape when viewed from the side. The movement of the upper plate 110 or the lower plate 170 may be guided by the upper wedge.

For example, the bidirectional movable elastic support 100 may include a first upper wedge 151, a second upper wedge 152, a third upper wedge 153, and a fourth upper wedge 154. The first upper wedge 151 may be spaced apart from the first side surface of the elastic pad 130 by a first designated distance Lo and may be disposed parallel to the first side surface. The second upper wedge 152 may be spaced apart from the second side of the elastic pad 130 parallel to the first side by a first designated distance and may be disposed parallel to the second side. The third upper wedge 153 may be spaced apart from the third side of the elastic pad 130 perpendicular to the first side and the second side by a second designated distance lo and disposed parallel to the third side. The fourth upper wedge 154 may be spaced apart from the fourth side of the elastic pad 130 parallel to the third side by a second designated distance and may be disposed parallel to the fourth side. The plurality of upper wedges 150 may form a rectangular area therein, and may be disposed to surround the metal panel 110. A moving distance Lo may be secured in the direction of the bridge axis by the plurality of upper wedges 150, and a movement distance lo may be secured in a direction perpendicular to the bridge axis.

According to an embodiment, an inner surface of each of the plurality of upper wedges 150 may be inclined in a direction away from the elastic pad 130. The elastic pad 130 can be easily deformed in the transverse direction without being jammed by the inclined inner surfaces of the plurality of upper wedges 150. In this document, the transverse deformation may mean a deformation in the direction of the axle axis and a direction perpendicular to the axis of the bridge.

The lower plate 170 may be disposed to face the upper plate 110. The lower plate 170 may be formed in a plate shape. The lower plate 170 may be formed in a square or rectangular shape. The lower plate 170 may have a shape corresponding to the upper plate 110. The lower plate 170 may be made of a metal material.

The plurality of lower wedges 180 may be attached to the upper surface of the lower plate 170. The plurality of upper wedges 150 may be fixed to the upper surface of the lower plate 170 by welding. Each of the plurality of lower wedges 180 may be disposed adjacent to the elastic pad 130. The plurality of upper wedges 150 may protrude upward from the lower plate 170. The plurality of lower wedges 180 may have a rectangular shape when viewed from the side. The elastic pad 130 may be fixed to the lower plate 170 by a lower wedge disposed to surround the elastic pad 130.

For example, the elastic support 100 may include a first lower wedge 181, a second lower wedge 182, a third lower wedge 183 and a fourth lower wedge 184. The first lower wedge 181 may be disposed adjacent to the first side of the elastic pad 130. The second lower wedge 182 may be disposed adjacent to the second side of the elastic pad 130 parallel to the first side. The third lower wedge 183 may be disposed adjacent to the third side of the elastic pad 130 perpendicular to the first side and the second side. The fourth lower wedge 184 may be disposed adjacent to the fourth side of the elastic pad 130 parallel to the third side. The plurality of upper wedges 150 may form a rectangular area therein, and may be disposed to surround the elastic pad 130.

According to an embodiment, an inner surface of each of the plurality of lower wedges 180 may be inclined in a direction away from the elastic pad 130. The elastic pad 130 may be easily deformed in the transverse direction without being jammed by the inclined inner surfaces of the plurality of lower wedges 180. The deformation of the elastic pad 130 will be described in detail with reference to FIG. 2.

According to an embodiment, the sum of the heights of each of the plurality of upper wedges 150 and the heights of each of the plurality of lower wedges 180 may be smaller than the height of the elastic pad 130. By limiting the heights of the plurality of upper wedges 150 and the plurality of lower wedges 180, the plurality of upper wedges 150 may not be in contact with the plurality of lower wedges 180.

2 shows an example in which a horizontal force is applied to a bidirectional movable elastic support according to an embodiment. The elastic support shown in FIG. 2 may be the same as the elastic support 100 shown in FIG. 1.

Referring to FIG. 2A, the upper plate and/or the lower plate of the elastic support according to an embodiment may move in the bridge axis direction according to the movement of the bridge upper plate and/or the pier. The plurality of upper wedges may guide the movement of the upper plate and/or the lower plate by sliding the metal panel and the fluororesin panel. The relative displacement of the upper plate with respect to the lower plate in the throttle direction may be -Lo to +Lo.

In the case of a conventional elastic support, it is possible to secure the transverse displacement by transverse deformation of the elastic pad. In this case, since a displacement of about 70% of the height of the elastic pad can be secured, it is necessary to increase the height of the elastic pad in order to increase the lateral displacement. When the height of the elastic pad is increased, the cost of the elastic support may increase, the quality of the elastic pad may be deteriorated, and the weight of the elastic support may increase. The elastic support according to an embodiment employs a metal panel and a fluororesin panel, and by disposing a plurality of upper wedges apart from the elastic pad, it is possible to secure lateral displacement without increasing the height of the elastic pad. In addition, when transverse deformation of the elastic pad occurs, a burden may be placed on the pier, but by securing the transverse displacement of -Lo to +Lo by sliding according to the position of the upper wedge without deformation of the elastic pad, the vehicle passes and The burden on the pier can be reduced by the movement of the bridge deck due to temperature changes.

Referring to (b) of FIG. 2, a plurality of upper wedges and/or a plurality of lower wedges may cause a transverse deformation of the elastic pad when a horizontal force is applied to the elastic support for a bridge in the bridge axis direction. Particularly, when an earthquake occurs and a horizontal force equal to or greater than a specified value is generated in the throttle direction, the elastic pad may be deformed in the transverse direction by the plurality of upper wedges and the plurality of lower wedges. The maximum displacement L1 in the throttling direction may be about 2Lo + 0.7H (H = height of the elastic pad). In this document, the height of the elastic pad is an effective rubber height, and may mean a length of the elastic pad excluding the height of the metal plate included in the elastic pad.

When a strong horizontal force, such as an earthquake, is applied to the elastic support, the force is absorbed like a spring by the deformation of the elastic pad, so that a seismic isolation function can be provided. In addition, since the upper wedge and the lower wedge are not in contact, noise generation and damage due to collision of the upper wedge and/or the lower wedge can be prevented, and an effect of preventing falling bridge can be obtained. In addition, since the inner surfaces of the plurality of upper and lower wedges are inclined, the elastic pad can be easily deformed without being caught.

Referring to FIG. 2C, the upper plate and/or the lower plate may move in a direction perpendicular to the bridge axis according to the movement of the bridge upper plate and/or the pier. The plurality of upper wedges may guide the movement of the upper plate and/or the lower plate by sliding the metal panel and the fluororesin panel. The relative displacement of the upper plate with respect to the lower plate in a direction perpendicular to the cross axis may be -lo to +lo. The elastic bearing can behave similarly to the movement in the direction of the axle even for the movement in the direction perpendicular to the axis of the bridge, and can achieve a similar effect.

Referring to FIG. 2D, a plurality of upper wedges and/or a plurality of lower wedges may cause transverse deformation of the elastic pad when a horizontal force is applied to the elastic support for a bridge in a direction perpendicular to the bridge axis. In particular, when an earthquake occurs and a horizontal force equal to or greater than a specified value is generated in a direction perpendicular to the bridge axis, the elastic pad may be deformed in the transverse direction by the plurality of upper wedges and the plurality of lower wedges. The maximum displacement l1 in the perpendicular direction of the bridge axis may be about 2lo + 0.35H (H=height of the elastic pad). The elastic bearing can behave similarly to the movement in the direction of the axle even for the movement in the direction perpendicular to the axis of the bridge, and can achieve a similar effect.

3 is a plan view, a front view, and a side view of a one-way movable elastic support according to an embodiment.

Referring to FIG. 3, a one-way movable elastic support 300 according to an embodiment includes an upper plate 310, a metal panel 320, an elastic pad 330, a fluororesin panel 340, and a plurality of upper wedges ( 350), a plurality of auxiliary wedges 360, a lower plate 370, and may include a plurality of lower wedges 380. The one-way movable elastic support 300 may be configured to accommodate movement in the throttling direction. For convenience of explanation, a description of a configuration similar to that of the elastic support 100 of FIG. 1 will be omitted.

The plurality of upper wedges 350 may be attached to the lower surface of the upper plate 310. The plurality of upper wedges 350 may be fixed to the lower surface of the upper plate 310 by welding. The plurality of upper wedges 350 may be spaced apart from the elastic pad 330 in the throttling direction and disposed perpendicular to the throttling direction in order to secure displacement in the throttling direction. Since the elastic support 300 of FIG. 3 is a one-way movable type, it may include two upper wedges 350.

For example, the one-way movable elastic support 300 may include a first upper wedge 351 and a second upper wedge 352. The first upper wedge 351 may be spaced apart from the first side surface of the elastic pad 330 by a first designated distance Lo and may be disposed parallel to the first side surface. The second upper wedge 352 may be spaced apart from the second side of the elastic pad 330 parallel to the first side by a first designated distance and may be disposed parallel to the second side.

The plurality of auxiliary wedges 360 may be attached to the lower surface of the upper plate 310. The plurality of auxiliary wedges 360 may be fixed to the lower surface of the upper plate 310 by welding. The plurality of auxiliary wedges 360 may be disposed so as to be perpendicular to the orthogonal direction of the bridge axis and laterally adjacent to one of the lower wedges in order to limit movement in the direction perpendicular to the bridge axis and guide the movement in the direction of the bridge axis. Since the elastic support 300 of FIG. 3 is a one-way movable type, it may include two auxiliary wedges 360.

For example, the one-way movable elastic support 300 may include a first auxiliary wedge 363 and a second auxiliary wedge 364. The first auxiliary wedge 363 is spaced apart from the third side of the elastic pad 330 perpendicular to the first side and the second side of the elastic pad 330 by a second designated distance lo, and the upper plate 310 It is attached parallel to the third side surface of the lower surface, and may be disposed adjacent to the third lower wedge 383 laterally. The second auxiliary wedge 364 is spaced apart from the fourth side of the elastic pad 330 parallel to the third side of the elastic pad 330 by a second specified distance, and the fourth side and the fourth side on the lower surface of the upper plate 310. It is attached in parallel and may be disposed adjacent to the fourth lower wedge 384 in a lateral direction. A fine gap (qo=Δ) may be formed between the auxiliary wedge and the lower wedge.

A concave portion may be formed in each of the left end and the right end of each of the plurality of auxiliary wedges 360. For example, each of the plurality of auxiliary wedges 360 may include a V-shaped first concave portion formed at a left end and a V-shaped second concave portion formed at a right end.

4 shows an example in which a horizontal force is applied to a one-way movable elastic support according to an embodiment.

Referring to FIG. 4A, the upper plate and/or the lower plate of the elastic support according to an embodiment may move in the bridge axis direction according to the movement of the bridge upper plate and/or the pier. The plurality of upper wedges may guide the movement of the upper plate and/or the lower plate by sliding the metal panel and the fluororesin panel. The relative displacement of the upper plate with respect to the lower plate in the throttle direction may be -Lo to +Lo.

Referring to FIG. 4B, a plurality of upper wedges and/or a plurality of lower wedges may cause a transverse deformation of the elastic pad when a horizontal force is applied to the elastic bearing for a bridge in the bridge axis direction. Particularly, when an earthquake occurs and a horizontal force equal to or greater than a specified value is generated in the throttle direction, the elastic pad may be deformed in the transverse direction by the plurality of upper wedges and the plurality of lower wedges. The maximum displacement L1 in the throttling direction may be about 2Lo + 0.7H (H = height of the elastic pad).

Referring to (c) of FIG. 4, the movement of the elastic support in a direction perpendicular to the axle axis according to an embodiment may be limited by the auxiliary wedge. When one of the auxiliary wedges contacts the lower wedge, the distance l1 between the other auxiliary wedge and the lower wedge may be 2Δ.

Referring to FIG. 4D, the auxiliary wedge may be broken when a horizontal force of more than a specified value is applied in a direction perpendicular to the bridge axis due to an earthquake or the like. In particular, a portion of the auxiliary wedge in which the concave portion is formed may be broken. The elastic pad may be deformed in the transverse direction by the broken and remaining portion of the auxiliary wedge, the seismic isolation function may be performed by absorbing the force, and the falling bridge may be prevented. The maximum displacement l2 in the perpendicular direction of the axle axis may be about 2lo + 0.35H.

5 is a plan view, a front view, and a side view of a one-way fixed elastic support according to an embodiment.

Referring to FIG. 5, a one-way fixed elastic support 500 according to an embodiment includes an upper plate 510, a metal panel 520, an elastic pad 530, a fluororesin panel 540, and a plurality of upper wedges 550. ), a plurality of auxiliary wedges 560, a lower plate 570, and a plurality of lower wedges 580 may be included. The one-way fixed elastic support 500 may be configured to accommodate a movement in a direction perpendicular to the orthogonal axis. For convenience of explanation, descriptions of configurations similar to those of the elastic support 100 of FIG. 1 and the elastic support 300 of FIG. 3 will be omitted.

The plurality of auxiliary wedges 560 may be attached to the lower surface of the upper plate 510. The plurality of auxiliary wedges 560 may be fixed to the lower surface of the upper plate 510 by welding. The plurality of auxiliary wedges 560 may be disposed to be perpendicular to the abutment direction and laterally adjacent to one of the plurality of lower wedges 580 in order to limit the movement in the bridge axis direction and guide the movement in the direction perpendicular to the bridge axis. . Since the elastic support 500 of FIG. 5 is a one-way fixed type, it may include two auxiliary wedges 560.

For example, the one-way fixed elastic support 500 may include a first auxiliary wedge 561 and a second auxiliary wedge 562. The first auxiliary wedge 561 is spaced apart from the first side of the elastic pad 530 by a first designated distance (Lo), is attached to the lower surface of the upper plate 510 in parallel with the first side, and the first lower wedge (581) and can be disposed adjacent to the side. The second auxiliary wedge 562 is spaced apart from the second side of the elastic pad 530 by a first specified distance, is attached to the lower surface of the upper plate 510 in parallel with the second side, and the second lower wedge 582 And can be disposed adjacent to each other laterally. A fine gap (Qo=Δ) may be formed between the auxiliary wedge and the lower wedge.

The plurality of upper wedges 550 may be attached to the lower surface of the upper plate 510. The plurality of upper wedges 550 may be fixed to the lower surface of the upper plate 510 by welding. The plurality of upper wedges 550 may be spaced apart from the elastic pad 530 in a direction perpendicular to the intersecting axis in order to secure displacement in a direction perpendicular to the intersecting axis and may be disposed perpendicular to the direction perpendicular to the intersecting axis. Since the elastic support 500 of FIG. 5 is a one-way fixed type, it may include two upper wedges 550.

For example, the one-way fixed elastic support 500 may include a first upper wedge 553 and a second upper wedge 554. The first upper wedge 553 may be spaced apart from the third side of the elastic pad 530 by a second designated distance lo and may be disposed parallel to the third side. The second upper wedge 554 may be spaced apart from the fourth side of the elastic pad 530 by a second designated distance and may be disposed parallel to the fourth side.

6 shows an example in which a horizontal force is applied to a one-way fixed elastic support according to an embodiment.

Referring to FIG. 6A, the movement of the elastic support in the throttling direction according to an embodiment may be limited by the auxiliary wedge. When one of the auxiliary wedges is in contact with the lower wedge, the distance L1 between the other auxiliary wedge and the lower wedge may be 2Δ.

Referring to (b) of FIG. 6, the auxiliary wedge may be broken when a horizontal force of more than a specified value is applied in the direction of the bridge axis due to an earthquake or the like. In particular, a portion of the auxiliary wedge in which the concave portion is formed may be broken. The elastic pad may be deformed in the transverse direction by the fractured and remaining portion of the auxiliary wedge, the seismic isolation function may be performed by absorbing the force, and the falling bridge may be prevented. The maximum displacement L2 in the throttle direction may be about 2Lo + 0.7H.

Referring to FIG. 6C, the upper plate and/or the lower plate of the elastic support according to an embodiment may move in a direction perpendicular to the bridge axis according to the movement of the bridge upper plate and/or the pier. The plurality of upper wedges may guide the movement of the upper plate and/or the lower plate by sliding the metal panel and the fluororesin panel. The relative displacement of the upper plate with respect to the lower plate in a direction perpendicular to the cross axis may be -lo to +lo.

Referring to FIG. 6D, a plurality of upper wedges and/or a plurality of lower wedges may cause transverse deformation of the elastic pad when a horizontal force is applied to the elastic support for a bridge in a direction perpendicular to the bridge axis. In particular, when an earthquake occurs and a horizontal force equal to or greater than a specified value is generated in a direction perpendicular to the bridge axis, the elastic pad may be deformed in the transverse direction by the plurality of upper wedges and the plurality of lower wedges. The maximum displacement l1 in the perpendicular direction of the bridge axis may be about 2lo + 0.35H (H=height of the elastic pad).

7 is a plan view, a front view, and a side view of a two-way fixed elastic support according to an embodiment.

Referring to FIG. 7, a bidirectional fixed elastic support 700 according to an embodiment includes an upper plate 710, an elastic pad 730, a fluororesin panel 740, a plurality of auxiliary wedges 760, and a lower plate 770. ) And a plurality of lower wedges 780 may be included. The two-way fixed elastic support 700 may be configured to be fixed without moving in the orthogonal direction of the orthogonal axis. For convenience of explanation, descriptions of configurations similar to those of the elastic bearings 100, 300 and 500 of FIGS. 1, 3 and 5 will be omitted.

The plurality of auxiliary wedges 760 may be attached to the lower surface of the upper plate 710. The plurality of auxiliary wedges 760 may be fixed to the lower surface of the upper plate 710 by welding. The plurality of auxiliary wedges 760 may be disposed to be laterally adjacent to each of the plurality of lower wedges 780 in order to limit movement in the orthogonal direction of the orthogonal axis. Since the elastic support 700 of FIG. 7 is a two-way fixed type, it may include four auxiliary wedges 760.

For example, the two-way fixed elastic support 700 may include a first auxiliary wedge 761, a second auxiliary wedge 762, a third auxiliary wedge 763, and a fourth auxiliary wedge 764. The first auxiliary wedge 761 is spaced apart from the first side of the elastic pad 730 by a first designated distance Lo, and is attached to the lower surface of the upper plate 710 in parallel with the first side, and the first lower wedge It may be disposed adjacent to the 781 and laterally. The second auxiliary wedge 762 is spaced apart from the second side of the elastic pad 730 by a first designated distance, is attached to the lower surface of the upper plate 710 in parallel with the second side, and the second lower wedge 782 And can be disposed adjacent to each other laterally. The third auxiliary wedge 763 is spaced apart from the third side of the elastic pad 730 by a second designated distance lo, is attached to the lower surface of the upper plate 710 in parallel with the third side, and the third lower wedge It may be disposed adjacent to the 783 and laterally. The fourth auxiliary wedge 764 is spaced apart from the fourth side of the elastic pad 730 by a second designated distance, is attached to the lower surface of the upper plate 710 in parallel with the fourth side, and the fourth lower wedge 784 And can be disposed adjacent to each other laterally. A fine gap (Qo=Δ) may be formed between the auxiliary wedge and the lower wedge.

8 illustrates an example in which a horizontal force is applied to a bidirectional fixed elastic support according to an embodiment.

Referring to FIG. 8A, the movement of the elastic support in the throttle direction according to an embodiment may be limited by the auxiliary wedge. When one of the auxiliary wedges is in contact with the lower wedge, the distance L1 between the other auxiliary wedge and the lower wedge may be 2Δ.

Referring to (b) of FIG. 8, the auxiliary wedge may be broken when a horizontal force of more than a specified value is applied in the direction of the bridge axis due to an earthquake or the like. In particular, a portion of the auxiliary wedge in which the concave portion is formed may be broken. The elastic pad may be deformed in the transverse direction by the fractured and remaining portion of the auxiliary wedge, the seismic isolation function may be performed by absorbing the force, and the falling bridge may be prevented. The maximum displacement L2 in the throttle direction may be about 2Lo + 0.7H.

Referring to (c) of FIG. 8, the movement of the elastic support in a direction perpendicular to the axle axis according to an embodiment may be limited by the auxiliary wedge. When one of the auxiliary wedges contacts the lower wedge, the distance l1 between the other auxiliary wedge and the lower wedge may be 2Δ.

Referring to (d) of FIG. 8, the auxiliary wedge may be broken when a horizontal force equal to or greater than a specified value is applied in a direction perpendicular to the bridge axis due to an earthquake or the like. In particular, a portion of the auxiliary wedge in which the concave portion is formed may be broken. The elastic pad may be deformed in the transverse direction by the fractured and remaining portion of the auxiliary wedge, the seismic isolation function may be performed by absorbing the force, and the falling bridge may be prevented. The maximum displacement l2 in the perpendicular direction of the axle axis may be about 2lo + 0.35H.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims below, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (8)

In the elastic bearing for the bridge,
Upper plate;
A lower plate disposed to face the upper plate;
A metal panel attached to a lower surface of the upper plate;
An elastic pad formed in a rectangular parallelepiped shape and positioned between the upper plate and the lower plate;
A fluororesin panel attached to the upper surface of the elastic pad;
A plurality of upper wedges spaced laterally from the elastic pad and attached to the lower surface of the upper plate; And
A plurality of lower wedges attached to the upper surface of the lower plate so as to be adjacent to the side surface of the elastic pad,
The sum of the heights of each of the plurality of upper wedges and the heights of each of the plurality of lower wedges is smaller than the height of the elastic pad, the elastic support for a bridge. The method of claim 1,
An inner surface of each of the plurality of lower wedges and the plurality of upper wedges is inclined in a direction away from the elastic pad. The method of claim 1,
The plurality of upper wedges, characterized in that not in contact with the plurality of lower wedges, elastic support for bridges. The method of claim 1,
The plurality of upper wedges guide the movement of the upper plate by sliding of the metal panel and the fluororesin panel, the elastic support for a bridge. The method of claim 1,
The plurality of upper wedges, characterized in that causing the transverse deformation of the elastic pad when a horizontal force is applied to the elastic support for the bridge, the elastic support for the bridge. The method of claim 1,
The plurality of upper wedges are spaced apart from a first side surface of the elastic pad by a first designated distance and disposed in parallel with the first side surface, and a second side surface of the elastic pad parallel to the first side surface And a second upper wedge that is spaced apart by the first specified distance from and disposed in parallel with the second side,
A first auxiliary wedge separated by a second predetermined distance from the third side of the elastic pad perpendicular to the first side and the second side and attached to the lower surface of the upper plate in parallel with the third side, and 3 Further comprising a plurality of auxiliary wedges spaced apart by the second designated distance from the fourth side of the elastic pad parallel to the side and including a second auxiliary wedge attached to the lower surface of the upper plate in parallel with the fourth side and,
Each of the plurality of auxiliary wedges is disposed to be adjacent to one of the plurality of lower wedges in a lateral direction, and a concave portion is formed at each of the left end and the right end. The method of claim 6,
Each of the plurality of auxiliary wedges comprises a V-shaped first concave portion formed at the left end and the V-shaped second concave portion formed at the right end, elastic bearings for bridges. The method of claim 1,
The plurality of upper wedges,
A first upper wedge spaced from the first side of the elastic pad by a first designated distance and disposed in parallel with the first side,
A second upper wedge spaced from a second side of the elastic pad parallel to the first side by the first designated distance and disposed parallel to the second side,
A third upper wedge spaced apart from the first side and a third side of the elastic pad perpendicular to the second side by a second designated distance and disposed in parallel with the third side, and
Characterized in that it comprises a fourth upper wedge spaced from a fourth side of the elastic pad parallel to the third side by the second designated distance and disposed in parallel with the fourth side.

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