KR100997697B1 - Base isolation for bridge - Google Patents

Abstract

The present invention relates to an earthquake-proof base for a bridge and includes an upper body of a housing shape fixed to an upper structure of a bridge, a mounting portion provided at a lower portion of the upper body, and formed with a spherical groove, and supported by a bridge of the bridge. It is provided between the lower body, the support portion formed in the upper portion of the lower body and the spherical protrusions for supporting the mounting portion, and provided between the support portion and the inner side of the upper body to cushion the relative horizontal movement between the support portion and the upper body It relates to an isolating base bearing provided with a ring-shaped buffer.

Description

Seismic isolation for bridges {Bridge bearing}

The present invention relates to a seismic stand for bridges, and more particularly, to a seismic stand for bridges, which can be installed between a bridge and an upper structure to buffer and segregate (or disperse) a horizontal impact load transmitted from the upper structure.

Seismic bearings, which are widely used as seismic bridge bearings in the world so far, are not only load-bearing and load-transfer functions, but also the ability to accommodate the expansion and displacement of the superstructure of the bridge caused by temperature, creep, dry shrinkage and deflection of the beam. It is widely used as a seismic isolating design concept to prepare for earthquakes by distributing the to each shift and piers.

These seismic bearings are classified into elastomeric bridge bearings, spherical bearings, spherical bearings, monopot-type bearings and multipot-type bearings. .

Among these, the spherical bridge bearing, which is an inelastic bridge bearing, has its own strength, but its use is gradually reduced due to the disadvantage of not being able to expect a buffer function.

On the other hand, multi-port bridge support, single-port bridge support, or elastomeric bridge support are all elastic bridge supports, and the single-port bridge support supports elastomers stably to support large loads. Type bridge bearings are being used more and more due to the advantage that they can be manufactured at a low price.

In general, the bridge is composed of a plurality of bridges, bridges and beams and upper plates installed on the upper portion of the bridge to securely support the upper load of the bridge, and to be free from sagging and stretching due to the passage load or temperature change of the bridge.

In addition, in order to prevent damage or fall of the structure, the connection part between the upper part of the pier and the lower part of the beam is classified into a fixed end, a longitudinal movable end, a lateral movable end and a longitudinally lateral movable end, and the corresponding elastic support is developed. And practical use.

On the other hand, bridges that do not reflect seismic design may cause seismic forces acting in the horizontal direction to be concentrated in the bridge support, which may result in destruction of the bridge support during the earthquake, detachment of the top plate, and collapse of the top plate. It is likely to be damaged.

Therefore, bridges that do not reflect seismic design, even in areas where small and medium earthquakes are expected, are highly concerned about earthquake damage. Therefore, when designing to secure seismic safety, proper seismic design work should be conducted.

Accordingly, in recent years, it has been required to develop a seismic isolator for bridges that can be expected to have excellent strength and cushion the horizontal impact of the bridge.

The present invention has been made to solve the above problems, by using a spherical bridge bearing to improve the buffer to the horizontal impact load applied to the seismic bearing for bridges excellent in self-support strength and excellent seismic performance The purpose is to provide.

A seismic isolation base for a bridge according to an embodiment of the present invention for achieving the above object is provided with an upper body of a housing shape fixed to an upper structure of a bridge, and a lower groove formed in a lower portion of the upper body. A support portion, a lower body supported by the pier of the bridge, a support portion provided on an upper portion of the lower body and having a spherical protrusion supporting the mount portion, and provided between the support portion and an inner side of the upper body. And it has a ring-shaped buffer for cushioning the relative horizontal movement between the upper body.

In order to achieve the above object, a seismic isolator for a bridge according to another embodiment of the present invention includes an upper plate fixed to an upper structure of a bridge, and an upper portion of a housing shape slidably coupled in an axial direction with respect to the upper plate. A body, a mounting portion provided in the lower portion of the upper body and formed with a spherical groove, a lower body supported by the bridge pier of the bridge, and a spherical protrusion provided on the upper portion of the lower body and supporting the mounting portion Is provided with a support, and provided between the support and the inner side of the upper body has a ring-shaped buffer for cushioning the relative horizontal movement between the support and the upper body.

In order to achieve the above object, a seismic isolator for bridge according to another embodiment of the present invention includes an upper plate fixed to an upper structure of a bridge, and an enclosure shape coupled to be slidably movable in an axial direction with respect to the upper plate. An upper body, a locking device provided between the upper plate and the upper body to limit vibration in the axial direction, a mounting portion provided below the upper body and having a spherical groove formed thereon, and a pier on the bridge. A lower portion supported by the lower body, a support portion provided on an upper portion of the lower body and having a spherical protrusion supporting the mounting portion, and provided between the support portion and the inner side of the upper body and having a relative horizontal movement between the support portion and the upper body. It is provided with a ring-shaped buffer portion for cushioning.

According to the seismic isolator for bridge according to the present invention, it is possible to effectively buffer the horizontal impact load applied to the bridge by supporting the bridge by using a spherical bridge bearing having excellent self-supporting strength.

Hereinafter, with reference to the accompanying drawings will be described in detail the seismic isolation for the bridge according to the present invention.

In the description of the present invention, the names of the elements defined are defined in consideration of functions in the present invention, and should not be understood as meanings that limit the technical elements of the present invention. May be referred to by other names in the art. In addition, the code added to each component is described for convenience of description, and the contents shown in the drawings in which these codes are described do not limit each component to the range in the drawing. In addition, as long as the functional similarity and identity thereof, even if the modified embodiment is adopted, it can be seen as an equivalent configuration, and even if the embodiment in which the modified part of the configuration is employed, it can be seen as an equivalent configuration.

Meanwhile, the seismic isolators for bridges according to the present invention to be described below are provided between the upper structure 10 and the pier 30 (or alternately, including in the "pier" below) of the bridge to form the upper structure 10 and the pier ( 30) to attenuate the horizontal impact load (or vibration) transmitted between them. The detailed description of the upper structure 10 and the bridge 30 of the bridge will be omitted.

First, the base isolation support for a bridge according to an embodiment of the present invention will be briefly described with reference to the accompanying drawings.

1 is a partial cross-sectional perspective view showing a seismic isolator for a bridge according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing the internal structure of the seismic isolator for a bridge according to an embodiment of the present invention.

First, the seismic isolator for bridges according to an embodiment of the present invention is located between the upper structure 10 and the bridge 30 of the bridge, so that the elastic displacement due to constant temperature change, etc. is accommodated in the compressive rigidity of the rubber, so that the horizontal displacement At the same time to the elastic fixing role for the friction between the upper structure 10 and the piers 30 generated during the earthquake is to be able to perform a frictional damping and restoring action against the impact load in the horizontal direction.

In the following description, to prevent confusion with other embodiments, and to facilitate the description, it is referred to as "fixed base isolation base".

The fixed end seismic support 100 is provided with an upper body 110 having a housing shape fixed to the upper structure 10 of the bridge, and a lower groove having a spherical shape formed at the lower portion of the upper body 110. Spherical shape to be inserted into the recess 120, the lower body 130 that is supported by the bridge pier 30 of the bridge, the upper body of the lower body 130 is formed in the mounting portion 120 A ring-shaped buffer portion provided between the support portion 140 and the support portion 140 formed on the inner side of the support portion 140 and the upper body 110 to cushion the relative horizontal movement of the support portion 140 or the upper body 110. 150.

The upper body 110 is a cylindrical enclosure shape that is formed with a space that is opened to the lower side, the upper portion is welded or welded to a sole-plate (sole-plate) (not shown) provided on the lower surface of the upper structure 10 of the bridge The upper plate 112 to be fastened to be bolted is formed, and the lower portion of the upper plate 112 is formed with a cylindrical support wall 114 protruding downward along the lower outer peripheral surface of the upper plate 112. In addition, a sliding plate 116 made of stainless steel is provided on the inner surface of the upper plate 112 of the upper body 110 to damp the friction with the mounting portion 120.

The mounting portion 120 is provided to contact the sliding plate 116 provided on the inner side of the upper plate 112 from the inner side of the upper body 110 of the enclosure shape. The mounting portion 120 is provided with a friction plate 122 for attenuating the impact load in the horizontal direction by friction in contact with the sliding plate 116 on the upper surface, the lower groove is inserted into the spherical groove (140) 124 is formed.

On the other hand, a plurality of stoppers 126 fixed to the front end bolt 127 is provided on the pair of sides facing the mounting portion 120 as described above. The stopper 126 is provided to resist horizontal loads such as constant wind loads, and the shear bolts 127 are broken when excessive impact loads are applied, thereby releasing resistance against impact loads.

The support 140 is fixed to the upper surface of the lower body 130 is inserted into the old groove 124 of the mounting portion 120 to support the upper structure 10 of the bridge in which the upper body 110 is fixed in the vertical direction To this end, it is provided in a cylindrical shape having a predetermined diameter and the upper end is formed with a spherical protrusion 142 inserted into the spherical groove 124 of the mounting portion 120.

In addition, the outer circumferential surface of the support unit 140, when inserted into the center of the buffer unit 150 to prevent the departure from the buffer unit 150, and to adjust the installation position of the buffer unit 150, the circumferential surface of the support unit 140 A plurality of coupling protrusions 143 is formed along the.

The spherical protrusion 142 of the support 140 is inserted into the spherical groove 124 of the mounting portion 120 to support the upper structure 10, the dynamic load of the vehicle, earthquake and the upper structure 10 to the upper structure (10) When the load biased to the upper structure 10 by the deflection of the) is to accommodate the rotation of the upper structure 10 in the state of supporting the upper structure (10).

In addition, between the spherical protrusion 142 of the support portion 140 and the spherical groove 124 of the mounting portion 120 in order to reduce the frictional force due to the rotation between the spherical protrusion and the spherical groove (PTFE) plate (146) This is more prepared.

The lower body 130 is seated and fixed to the bed block 32 is placed on top of the pier (30). In the lower body 130, a plurality of anchor sockets 132 to be fixed to the bed block 32 is placed on the pier 30, a plurality of fixing bolts 134 for fixing the anchor socket 132 is further Prepared.

The buffer unit 150 has a support portion 140 is inserted into the center portion, the outer peripheral surface is provided in a ring shape supported by the inner peripheral surface of the support wall 114 of the upper body 110, the upper structure 10 and the piers 30 It is for buffering and restoring the impact load generated between the two, and is formed in a ring shape made of rubber material. The inner circumferential surface and the outer circumferential surface of the shock absorbing part 150 are provided with an inner reinforcing material 152 and an outer reinforcing material 154 to fix the ring shape of the shock absorbing part 150 and prevent breakage of the shock absorbing part.

The external reinforcing material 154 is provided between the buffer unit 150 and the support wall 114 of the upper body 110 to form the shape of the buffer unit 150 when the buffer unit 150 is deformed according to the occurrence of the horizontal load. The internal reinforcing material 152 is provided between the buffer part and the support part to maintain the shape of the buffer part 150 when the buffer part 150 is deformed according to the occurrence of the impact load.

In addition, a plurality of coupling grooves 153 are formed on the inner circumferential surface of the internal reinforcing material 152 to be coupled to the coupling protrusion 143 formed on the outer circumferential surface of the support part 140 to prevent their separation.

On the other hand, the above-mentioned buffer unit 150 is coupled to the lower surface of the lower body 130 by the coupling of the coupling groove 153 formed on the inner circumferential surface of the internal reinforcing material 152 and the coupling protrusion 143 formed on the outer circumferential surface of the support unit 140. It may be installed so as to be spaced apart from each other at predetermined intervals. Therefore, it is possible to secure a space for the installation of the lower body 130, and to increase the applicability of the piers, such as securing the pore distance, it is possible to prevent the lower body 130 from being unnecessarily enlarged.

The fixed end isolation base 100 having the configuration as described above is installed between the upper structure 10 and the bridge 30 of the bridge, when the impact load in the horizontal direction to the bridge is applied to the upper structure 10 and the bridge The impact load generated between the 30 and the friction plate 122 provided between the inner side of the upper body 110 and the upper surface of the mounting portion 120, and the buffer portion provided between the support portion 140 and the inner side of the upper body 110. Attenuation, cushioning, and restoring actions are performed by 150.

In addition, the mounting portion 120 for supporting the upper body 110 is provided to withstand the horizontal load, such as the usual wind load by the stopper 126 with respect to the upper body 110, the stopper 126 when excessive impact load occurs ) Can be broken to perform the seismic isolation in all directions.

Hereinafter, with reference to the accompanying drawings will be briefly described a seismic stand for bridges according to another embodiment of the present invention.

3 is a partial cross-sectional perspective view showing a seismic isolator for a bridge according to another embodiment of the present invention, Figure 4 is a cross-sectional view showing the internal structure of the seismic isolator for a bridge according to an embodiment of the present invention.

First, the seismic isolation base for a bridge according to another embodiment of the present invention is located between the upper structure 10 and the bridge 30 of the bridge to perform a free end role in the direction of the bridge, and a fixed end role in the direction of the bridge. If the impact load occurs in the horizontal direction between the upper structure 10 and the piers 30 during the earthquake, the friction damping in the axial direction, the friction damping and restoring action in the direction of the weaving.

In the following description, to prevent confusion with other embodiments and at the same time to be referred to as "orthogonal isolation base" for convenience of description.

Such, the direction of the seismic isolation base 200 is the upper plate 205 fixed to the upper structure 10 of the bridge, and the upper body 210 of the enclosure shape that is movably coupled to the upper plate 205 in the axial direction; The lower portion of the upper body 210, the mounting portion 220 is formed with a spherical groove, the lower body 230 supported by the bridge 30 of the bridge, and the lower body 230 The support part 240 is provided on the upper portion and provided with a spherical protrusion having a spherical shape to be inserted into the groove formed in the mounting part 220, and is provided between the support part 240 and the inner side of the upper body 210. Or a ring-shaped buffer portion 250 for buffering the relative horizontal movement of the upper body 210 is provided.

The upper plate 205 is fixed to be welded or bolted to a sole-plate (sole-plate) (not shown) provided on the lower surface of the upper structure 10 of the bridge, the lower body 210 to be described later Guide grooves 206 extending in the axial direction to be guided to the guide bar 218 is formed. In addition, a lower surface of the upper plate 205 is provided with a sliding plate 207 made of stainless steel in contact with the friction plate 213 provided on the upper surface of the upper body 210 to be described later.

The upper body 210 has a cylindrical shape in which a space is opened to the lower side, the upper plate 212 is provided with a guide bar 218 for guiding the upper plate 205.

The upper surface of the upper plate is provided with a friction plate 213 for attenuating the horizontal impact load by friction in contact with the sliding plate provided on the upper plate, the lower portion of the upper plate 212 along the lower outer peripheral surface of the lower plate 212 downward An extended supporting cylindrical wall 214 is formed. In addition, the inner surface of the upper plate 212 of the upper body 210 is provided with a sliding plate 216 made of stainless steel to reduce the frictional force with the mounting portion 220.

The mounting portion 220 is provided to contact the sliding plate 216 provided on the inner side of the upper plate 212 from the inner side of the upper body 210 of the enclosure shape. The mounting portion 220 is provided with a friction plate 222 for attenuating the impact load in the horizontal direction by friction in contact with the sliding plate 216 on the upper surface, the lower groove is inserted into the spherical support portion 240 ( 224 is formed.

On the other hand, a plurality of stoppers 226 fixed to the front end bolt 227 is provided on the pair of sides facing the mounting portion 220 as described above. The stopper 226 is provided to resist horizontal loads such as constant wind loads, and the shear bolts 227 are damaged when excessive impact loads are applied to release the resistance against impact loads.

The support part 240 is fixed to the upper surface of the lower body 230 is inserted into the old groove 224 of the mounting portion 220 to support the upper structure 10 of the bridge in which the upper body 210 is fixed in the vertical direction To this end, it is provided in a cylindrical shape having a predetermined diameter and the upper end is formed with a spherical protrusion 242 inserted into the spherical groove 224 of the mounting portion 220.

In addition, the outer circumferential surface of the supporter 240 prevents the separation of the shock absorber 250 when it is inserted into the center of the shock absorber 250, and adjusts the installation position of the shock absorber 250 to adjust the circumferential surface of the supporter 240. A plurality of coupling protrusions 243 are formed along the same.

The spherical protrusion 242 of the support 240 is inserted into the spherical groove 224 of the mounting portion 220 to support the upper structure 10, the dynamic load of the vehicle, the earthquake and the upper structure 10 to the upper structure (10) When the load biased to the upper structure 10 by the deflection of the) is to accommodate the rotation of the upper structure 10 in the state supporting the upper structure (10).

In addition, between the spherical protrusion 242 of the support portion 240 and the spherical groove 224 of the mounting portion 220 to reduce the frictional force due to the rotation between the spherical protrusion and the spherical groove (PTFE) plate (246) This is more prepared.

The lower body 230 is seated and fixed to the bed block 32 is placed on top of the pier (30). In the lower body 230, a plurality of anchor sockets 232 for fixing to the bed block 32, which is placed on the pier 30, and a plurality of fixing bolts 234 for fixing the anchor socket 232 is further Prepared.

The buffer part 250 has a support part 240 inserted into a central portion thereof, and an outer circumferential surface thereof is formed in a ring shape supported by an inner circumferential surface of the support wall 214 of the upper body 210, and the upper structure 10 and the pier 30 are provided. It is for cushioning and restoring the impact load generated between the two, and is formed in a rubber ring shape. The inner circumferential surface and the outer circumferential surface of the shock absorbing part 250 are provided with an inner reinforcing material 252 and an outer reinforcing material 254 to fix the ring shape of the shock absorbing part 250 and prevent breakage of the shock absorbing part.

The external reinforcing material 254 is provided between the shock absorbing portion 250 and the support wall 214 of the upper body 210 to form the shape of the shock absorbing portion 250 when the shock absorbing portion 250 is deformed according to the occurrence of the horizontal load. The internal reinforcing material 252 is provided between the buffer part and the support part to maintain the shape of the shock absorbing part 250 when the shock absorbing part 250 is deformed according to the impact load.

In addition, the inner circumferential surface of the internal reinforcing material 252 is coupled to the engaging projection 243 formed on the outer circumferential surface of the support portion 240 is formed with a plurality of coupling grooves 253 to prevent their separation.

On the other hand, the above-described shock absorbing portion 250 is coupled to the lower surface of the lower body 230 by the coupling of the coupling groove 253 formed on the inner circumferential surface of the internal reinforcing material 252 and the coupling protrusion 243 formed on the outer circumferential surface of the support 240. It may be installed so as to be spaced apart from each other at predetermined intervals. Therefore, it is possible to secure a space for the installation of the lower body 230, and to increase the applicability of the piers, such as securing the pore distance, to prevent the lower body 130 from being unnecessarily enlarged.

Thus, the teaching direction isolating base 200 having the configuration as described above, the upper plate 205 is provided to be movable in the axial direction along the guide bar 218 provided on the upper body 210, the upper structure of the bridge ( When the expansion and contraction of the 10) occurs, it is possible to prevent the horizontal force in the direction of the axial direction in accordance with the expansion and contraction of the upper structure 10 to be transmitted to the piers (30).

In addition, when the impact load in the horizontal direction is applied to the bridge between the upper structure 10 and the bridge 30 of the bridge against the impact load in the direction of the weaving direction between the upper structure 10 and the bridge 30 The friction plate 222 provided between the inner side of the upper body 210 and the upper surface of the mounting portion 220 and the damping and buffering action by the buffer unit 250 provided between the support portion 240 and the inner side of the upper body 210. To perform.

That is, between the upper structure 10 and the pier 30 always performs the free end role in the direction of the axial direction, the fixed end role in the direction of the teaching direction, when the impact load in the horizontal direction during the earthquake Friction attenuation in the direction and friction attenuation and restoring in the direction of teaching.

In addition, the mounting portion 220 supporting the upper body 210 is provided to resist the horizontal load such as the constant wind load by the stopper 226 with respect to the upper body 210, the stopper 226 when excessive horizontal load is generated ) Can be broken to perform the seismic isolation in all directions.

Hereinafter, with reference to the accompanying drawings will be briefly described a seismic stand for bridges according to another embodiment of the present invention.

5 is a perspective view showing a seismic isolation device for a bridge according to another embodiment of the present invention, Figure 6 is a partial cross-sectional perspective view of the seismic isolation device for a bridge according to another embodiment of the present invention, Figure 7 is a Cross-sectional view showing the internal structure of the seismic isolation device for a bridge according to another embodiment.

First, the seismic isolation support for a bridge according to another embodiment of the present invention is located between the upper structure 10 and the bridge 30 of the bridge, and always serves as a free end in the direction of the bridge, and a fixed end for the direction of the bridge. If the impact load in the horizontal direction between the upper structure 10 and the pier 30 is to play a role and to perform a friction damping and restoring action against the vibration in the throttling and teaching direction.

In the following description, to prevent confusion with other embodiments and at the same time to be referred to as "forward seismic support" for convenience of description.

This, the forward-side isolation base 300 is the upper plate 305 is fixed to the upper structure 10 of the bridge, and the upper body 310 of the enclosure shape is movably coupled to the upper plate 305 in the axial direction; Is provided between the upper plate 305 and the upper body 310, the locking device 360 for cushioning the vibration generated between the upper plate 305 and the upper body 310, and provided in the lower portion of the upper body 310 And a spherical portion 320 in which a spherical groove is formed, a lower body 330 supported by the bridge pier 30 of the bridge, and an upper portion of the lower body 330, A relative horizontal movement of the support part 340 or the upper body 310 is provided between the support part 340 and the support part 340 and the inner side of the upper part 310 and the support part 340 formed with a spherical protrusion to be inserted into the groove to be formed. It is provided with a ring-shaped buffer portion 350 for cushioning.

The upper plate 305 is fixed to be welded or bolted to a sole-plate (sole) (not shown) provided on the lower surface of the upper structure 10 of the bridge, the lower body 310 to be described later Guide grooves 206 extending in the axial direction to be moved to the guide bar 318 is formed. In addition, on both sides of the upper plate 305 in the axial direction, a pair of locking jaws 307 for supporting both ends of the locking device 360 to be described later are provided to protrude toward the locking device 360.

The upper body 310 has a cylindrical enclosure shape in which a space to be opened downward is formed, the upper plate 312 is provided with a guide bar 318 for supporting the upper plate 305, the upper plate ( The lower portion of the 312 is formed with a cylindrical support wall 314 extending downward protruding along the lower outer peripheral surface of the upper plate (312). In addition, the inner surface of the upper plate 312 of the upper body 310 is provided with a sliding plate 316 made of stainless steel to attenuate friction with the mounting portion (320).

In addition, on the outer circumferential surface of the support wall 314, a pair of support protrusions 315 for supporting the moving end of the locking device 360 to be described later on both sides of the axial direction are provided to protrude outward of the support wall 314. .

The locking device 360 is provided in a direction symmetrical to both ends of the upper plate 305 and the upper body 310 to exert a buffer against the impact force generated between the upper plate 305 and the upper body 310. Therefore, the locking device 360 of one side will be described, and the description of the locking device 360 of the other side will be omitted.

Meanwhile, the above-described locking device 360 may be a Luck-up Device (hereinafter referred to as LUD). The LUD is made by filling a silicon putty inside a cylinder, and exhibits a locking effect against rapid impact loads. Description of this LUD is well known and detailed description thereof will be omitted.

The mounting portion 320 is provided to contact the sliding plate 316 provided on the inner side of the upper plate 312 from the inner side of the upper body 310 of the enclosure shape. The mounting portion 320 is provided with a friction plate 322 to attenuate the impact load in the horizontal direction by friction in contact with the sliding plate 316 on the upper surface, the lower groove is inserted into the spherical support portion 340 is inserted 324 is formed.

On the other hand, a plurality of stoppers 326 fixed to the front end bolt 327 is provided on the pair of sides facing the mounting portion 320 as described above. The stopper 326 is provided to resist horizontal loads such as wind loads at all times, and to provide shear bolts 327 to be broken when excessive impact loads are applied, thereby releasing resistance against impact loads.

The support portion 340 is fixed to the upper surface of the lower body 330 is inserted into the old groove 324 of the mounting portion 320 to support the upper structure 10 of the bridge in which the upper body 310 is fixed in the vertical direction To this end, it is provided in a cylindrical shape having a predetermined diameter and the upper end is formed with a spherical protrusion 342 is inserted into the spherical groove 324 of the mounting portion (320).

In addition, the outer peripheral surface of the support portion 340 is prevented from being separated with respect to the buffer portion 350 when inserted into the center of the buffer portion 350, the circle of the support portion 240 to adjust the installation position of the buffer portion 350 A plurality of coupling protrusions 243 are formed along the main surface.

The spherical protrusion 342 of the support part 340 is inserted into the spherical groove 324 of the mounting part 320 to support the upper structure 10, the dynamic load of the vehicle, the earthquake and the upper structure 10 to the upper structure 10 When the load biased to the upper structure 10 by the deflection of the) is to accommodate the rotation of the upper structure 10 in the state supporting the upper structure (10).

In addition, between the spherical protrusion 342 of the support portion 340 and the spherical groove 324 of the mounting portion 320, a PTFE (Poly Tetra Fluoro Ethylene) plate 346 is further reduced to reduce the relative friction between the spherical protrusion and the spherical groove. Prepared.

The lower body 330 is fixed to the bed block 32 is placed on the upper portion of the pier (30). In the lower body 330, a plurality of anchor sockets 332 to be fixed to the bed block 32 is placed on the pier 30, and a plurality of fixing bolts 334 for fixing the anchor socket 332 is further Prepared.

The buffer unit 350 has a support portion 340 is inserted into the central portion, the outer peripheral surface is provided in a ring shape supported by the inner peripheral surface of the support wall 314 of the upper body 310, the upper structure 10 and the piers 30 It is for cushioning and restoring the impact load generated between the two, and is formed in a rubber ring shape. The inner circumferential surface and the outer circumferential surface of the shock absorbing part 350 are provided with an inner reinforcing material 352 and an outer reinforcing material 354 to fix the ring shape of the shock absorbing part 350 and prevent breakage of the shock absorbing part.

The external reinforcing material 354 is provided between the shock absorbing portion 350 and the support wall 314 of the upper body 310 to form the shape of the shock absorbing portion 350 when the shock absorbing portion 350 is deformed according to the occurrence of the horizontal load. The internal reinforcing material 352 is provided between the shock absorbing portion and the support portion to maintain the shape of the shock absorbing portion 350 when the shock absorbing portion 350 is deformed according to the impact load.

In addition, a plurality of coupling grooves 353 are formed on the inner circumferential surface of the internal reinforcing material 352 to be coupled to the coupling protrusion 343 formed on the outer circumferential surface of the support part 340 to prevent their separation.

On the other hand, the above-described shock absorbing portion 350 is coupled to the lower surface of the lower body 330 by the coupling between the coupling groove 353 formed on the inner circumferential surface of the internal reinforcing material 352 and the coupling protrusion 343 formed on the outer circumferential surface of the support portion 340. It may be installed so as to be spaced apart from each other at predetermined intervals. Thus, it is possible to secure a space for the installation of the lower body 330, and to increase the applicability of the piers, such as securing the pore distance, it is possible to prevent the lower body 130 from being unnecessarily enlarged.

Thus, the omnidirectional isolating base 300 having the configuration as described above, the upper plate 305 is always provided to be movable in the axial direction along the guide bar 318 provided on the upper body 310, the upper portion of the bridge When the elastic displacement of the structure 10 occurs, the load in the axial direction due to the elastic displacement of the upper structure 10 is prevented from being transferred to the piers 30.

In addition, in case of an earthquake, the upper structure 10 and the pier 30 are installed between the upper structure 10 and the bridge 30 of the bridge, and the locking device 360 is fixed when the impact load in the horizontal direction is applied to the bridge. Shock load provided in the horizontal direction generated between the friction plate 322 provided between the inner side of the upper body 310 and the upper surface of the mounting portion 320, and the buffer provided between the support portion 340 and the inner side of the upper body 310 The unit 350 performs attenuation, cushioning, and restoring operations on the throttling and the teaching directions.

In addition, the mounting portion 320 for supporting the upper body 310 is provided by the stopper 326 with respect to the upper body 310 to resist horizontal loads such as the usual wind load, the stopper 326 when excessive impact load occurs ) Can be broken so as to perform the isolation action in both directions.

Accordingly, the arrangement of the base isolation support for the bridge according to the embodiments of the present invention will be described in detail with reference to the drawings. The isolation bases for bridges and their respective elements mentioned below should be understood with reference to the above description and drawings.

9A to 9B are layout views showing the arrangement of the seismic isolation device for a bridge according to the present invention. Here, Figure 9a is a layout structure of the fixed end of the base bearings described in the present invention, and the seismic base bearing using the orthogonal isolation base, Figure 9b is a layout of the base isolation bearing using the fixed-edge base bearing and omnidirectional base plate support of the present invention. Structure.

First, referring to Figure 9a will be described an arrangement structure using the base isolation bearing of the present invention.

As shown, both ends of the bridge are arranged between the upper structure 10 and the shift 20, the general two-way bridge and one-way bridge, and both sides of the first piers (30a) adjacent to the bridge 20 in the direction of the seismic isolation base Place the 200, and the fixed end seismic isolation base 100 is disposed in the second piers (30b) located between the first piers (30a) on both sides.

Accordingly, when the upper structure 10 of the bridge is stretched or deformed (or moved) due to temperature and creep, the orthogonal isolating base 200 provided between the upper structure 10 and the first piers 30a and the upper structure ( The displacement amount is accommodated in the fixed end isolating base 100 provided between the 10) and the second piers 30b.

That is, based on the fixed end isolation base 100 provided between the upper structure 10 and the second pier 30b, the upper portion in the orthogonal isolation base 200 provided in the upper structure 10 and the first pier 30a. To accommodate the elastic displacement of the structure (10).

On the other hand, when a horizontal impact load occurs on the bridge due to an earthquake or the like, the perpendicular direction isolation support 200 provided between the upper structure 10 and the first bridge 30a, and the upper structure 10 and the first structure. The fixed end base isolation bearing 100 provided between the two piers 30b performs a damping effect on the impact load.

That is, in the fixed end isolation base 100 provided between the upper structure 10 and the second pier 30b, the damping action is performed with respect to all directions of the impact load in the horizontal direction, and the upper structure 10 and the first pier are provided. A damping effect is performed on the impact load in the direction of teaching in the horizontal shock bearing 200 provided between 30a in the impact load in the horizontal direction.

In this case, when the damping action by the fixed end base bearing 100 is described, when the impact load in the horizontal direction is generated, the upper body 110 fixed to the upper structure 10 and the support of the lower body 130 ( Friction attenuation occurs between the mounting portion 120 supported by the 140, the buffer unit 150 provided between the support wall 114 of the upper body 110 and the support portion 140 of the lower body 130 is By repeating compression and tensile deformation, shock loads generated between the superstructure 10 and the second piers 30b are buffered and restored.

In addition, the damping action by the zigzag isolation base 200, when a horizontal impact load occurs, the throttle between the upper plate 205 fixed to the upper structure 10, and the upper body 210 Friction attenuation occurs in the direction.

And between the upper body 210 and the mounting portion 220 supported by the support portion 240 of the lower body 230, friction attenuation occurs due to the horizontal impact in the direction of the teaching, the support of the upper body 210 A buffer 250 provided between the wall 214 and the support 240 of the lower body 230 buffers and restores the impact load between the upper structure 10 and the first pier while repeating compression and tensile deformation. .

Hereinafter, another arrangement structure using the base isolation support of the present invention will be described with reference to FIG. 9B.

As shown in the figure, both ends of the bridge are arranged between the upper structure 10 and the shift 20, a general two-way bridge device and one-way bridge device, and the first side pier 30a adjacent to the bridge 20, the forward all-quadrant bearings. A 300 is disposed, and the fixed end isolating base 100 is disposed in the second piers 30b positioned between the first piers 30a on both sides.

Accordingly, when the upper structure 10 of the bridge generates and expands (or moves) due to temperature and creep, the omnidirectional isolating bearing 300 provided between the upper structure 10 and the first pier 30a and the upper structure ( The displacement amount is accommodated in the fixed end isolating base 100 provided between the 10) and the second piers 30b.

That is, based on the fixed end isolation base 100 provided between the upper structure 10 and the second pier 30b, the upper portion of the omnidirectional isolation base 300 provided in the upper structure 10 and the first pier 30a is provided. To accommodate the elastic displacement of the structure (10).

On the other hand, when a horizontal impact load occurs on the bridge due to an earthquake or the like, the omnidirectional isolating bearing 300 provided between the upper structure 10 and the first bridge 30a, the upper structure 10 and the first structure are provided. In the fixed end seismic support 100 provided between the two piers (30b) performs a friction attenuation and restoring action for the impact load.

In this case, when the damping action by the fixed end base bearing 100 is described, when the impact load in the horizontal direction is generated, the upper body 110 fixed to the upper structure 10 and the support of the lower body 130 ( Friction attenuation occurs between the mounting portion 120 supported by the 140, the buffer unit 150 provided between the support wall 114 of the upper body 110 and the support portion 140 of the lower body 130 is Repeated compression and tensile deformation while buffering and restoring the impact load generated between the superstructure 10 and the second piers (30b).

In addition, the damping effect by the forward side isolation bearing 300, when the impact load in the horizontal direction occurs, throttling between the upper plate 305 fixed to the upper structure 10 and the upper body 310 Movement in the direction is fixed by the lock 360.

Accordingly, friction attenuation occurs between the upper body 310 receiving the horizontal load from the upper plate and the mounting part 320 supported by the support part 340 of the lower body 330, and supporting the upper body 310. A buffer 350 provided between the wall 314 and the support 340 of the lower body 330 buffers and restores the impact load between the upper structure 10 and the first pier while repeating compression and tensile deformation. .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, The present invention may be modified in various ways. Therefore, modifications of the embodiments of the present invention will not depart from the scope of the present invention.

For example, it may be carried out by adding a component having another additional function to the seismic isolator for the bridge according to the present invention, or by replacing it with another component. However, all other modified embodiments include the essential elements of the present invention should be considered to be included in the technical scope of the present invention.

1 is a partial cross-sectional perspective view showing a seismic isolation device for a bridge according to an embodiment of the present invention.

Figure 2 is a cross-sectional view showing the internal structure of the seismic isolation device for a bridge according to an embodiment of the present invention.

3 is a partial cross-sectional perspective view showing a seismic isolation device for a bridge according to another embodiment of the present invention.

Figure 4 is a cross-sectional view showing the internal structure of the seismic isolation device for a bridge according to an embodiment of the present invention.

5 is a perspective view showing a seismic isolation device for a bridge according to another embodiment of the present invention.

Figure 6 is a partial cross-sectional perspective view showing a seismic isolation device for a bridge according to another embodiment of the present invention.

Figure 7 is a cross-sectional view showing the internal structure of the seismic isolation device for a bridge according to another embodiment of the present invention.

8A to 8B are layout views showing the arrangement of the seismic isolator for bridges according to the present invention.

Claims (20)

The upper body of the enclosure shape is fixed to the upper structure of the bridge, A mounting portion provided below the upper body and having a spherical groove formed therein; A lower body supported by the pier of the bridge, A support part provided on an upper portion of the lower body and having a spherical protrusion supporting the mounting part; A ring-shaped buffer part provided between the support part and the inner side of the upper body to cushion a relative horizontal movement between the support part and the upper body, The mounting portion is provided with a plurality of stoppers on both sides facing the mounting portion to resist the horizontal load such as the usual wind load on the inner upper surface of the upper body. The method of claim 1, The upper body and the top plate for fixing the upper structure, A support wall extending downward along the lower outer circumferential surface of the upper plate to support the outer circumferential surface of the buffer part; Is provided on the lower surface of the upper plate isolating base bearing for the bridge characterized in that it comprises a sliding plate in contact with the mounting portion. The method of claim 1, The mounting portion is provided with a friction plate in contact with the inner upper surface of the upper body on the upper portion, the lower groove is formed with the support portion is inserted, the support portion is a bridge characterized in that the spherical projection is inserted into the sphere groove is formed on the upper portion Base isolation. The method of claim 3, wherein Between the spherical groove and the spherical protrusion, the base plate for the bridge, characterized in that the PTFE plate for facilitating the rotation between the spherical protrusion is further provided. delete The method of claim 1, A plurality of coupling protrusions are formed on the outer circumferential surface of the support, and a coupling groove into which the coupling protrusion is inserted is formed on the inner circumferential surface of the buffer part. An upper plate fixed to the upper structure of the bridge, An upper body having a housing shape slidably coupled in an axial direction with respect to the upper plate; A mounting portion provided below the upper body and having a spherical groove formed therein; A lower body supported by the pier of the bridge, A support part provided on an upper portion of the lower body and having a spherical protrusion supporting the mounting part; A ring-shaped buffer part provided between the support part and the inner side of the upper body to cushion a relative horizontal movement between the support part and the upper body, The mounting portion is provided with a plurality of stoppers on both sides facing the mounting portion to resist the horizontal load such as the usual wind load on the inner upper surface of the upper body. The method of claim 7, wherein The upper body and the top plate for fixing the upper structure, A support wall extending downward along the lower outer circumferential surface of the upper plate to support the outer circumferential surface of the buffer part; Is provided on the lower surface of the upper plate isolating base bearing for the bridge characterized in that it comprises a sliding plate in contact with the mounting portion. The method of claim 7, wherein The mounting portion is provided with a friction plate in contact with the inner upper surface of the upper body on the upper portion, the lower groove is formed with the support portion is inserted, the support portion is a bridge characterized in that the spherical projection is inserted into the sphere groove is formed on the upper portion Base isolation. The method of claim 9, Between the spherical groove and the spherical protrusion, the base plate for the bridge, characterized in that the PTFE plate for facilitating the rotation between the spherical protrusion is further provided. delete The method of claim 7, wherein A plurality of coupling protrusions are formed on the outer circumferential surface of the support, and the coupling groove for inserting the coupling protrusions is formed on the inner circumferential surface of the buffer part. An upper plate fixed to the upper structure of the bridge, An upper body having a housing shape slidably coupled in an axial direction with respect to the upper plate; A locking device provided between the upper plate and the upper body to limit vibration in the axial direction; A mounting portion provided below the upper body and having a spherical groove formed therein; A lower body supported by the pier of the bridge, A support part provided on an upper portion of the lower body and having a spherical protrusion supporting the mounting part; A ring-shaped buffer part provided between the support part and the inner side of the upper body to cushion a relative horizontal movement between the support part and the upper body, The mounting portion is provided with a plurality of stoppers on both sides facing the mounting portion to resist the horizontal load such as the usual wind load on the inner upper surface of the upper body. The method of claim 13, The upper body and the top plate for fixing the upper structure, A support wall extending downward along the lower outer circumferential surface of the upper plate to support the outer circumferential surface of the buffer part; Is provided on the lower surface of the upper plate isolating base bearing for the bridge characterized in that it comprises a sliding plate in contact with the mounting portion. The method of claim 13, The mounting portion is provided with a friction plate in contact with the inner upper surface of the upper body on the upper portion, the lower groove is formed with the support portion is inserted, the support portion is a bridge characterized in that the spherical projection is inserted into the sphere groove is formed on the upper portion Base isolation. The method of claim 15, Between the spherical groove and the spherical protrusion, the base plate is characterized in that the PTFE plate for reducing the friction between the spherical groove and the spherical protrusion is further provided. delete The method of claim 13, A plurality of coupling protrusions are formed on the outer circumferential surface of the support portion, and the seismic isolation support for the bridge, characterized in that the coupling groove into which the coupling protrusion is inserted is formed on the inner circumferential surface of the buffer portion. The method of claim 18, A pair of locking jaws for supporting both ends of the locking device is formed on both sides of the upper plate in the axial direction, The base seismic bearing for the bridge, characterized in that the support protrusion for supporting the moving end of the locking device is formed on the outside of the upper body. The method of claim 18, The seismic isolation device for a bridge, characterized in that the locking device is LUD.

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