KR100997698B1 - Bridge bearing - Google Patents

Abstract

The present invention relates to a base isolation support for bridges, the upper body of the rectangular box shape is fixed to the upper structure of the bridge, the mounting portion provided in the lower portion of the upper body and formed with a spherical groove, and installed in the bridge piers And a support portion having a spherical protrusion for supporting the mount portion, and a buffer portion provided between the mount portion and the inner side of the upper body to cushion and restore the relative horizontal movement between the mount portion and the upper body. It is about base isolation.

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 low prices.

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.

The seismic isolator for a bridge according to an embodiment of the present invention for achieving the above object, the upper body of the rectangular box shape is fixed to the upper structure of the bridge, and provided in the lower portion of the upper body is formed with a spherical groove A mounting portion, a support portion formed at a bridge of the bridge and having a spherical protrusion supporting the mounting portion, and provided between the mounting portion and the inner side of the upper body, and the relative horizontal movement between the mounting portion and the upper body. It is provided with a buffer for buffering and restoring.

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 a rectangular enclosure shape that is slidably coupled in an axial direction with respect to the upper plate. An upper body, a mounting portion provided under the upper body and having a spherical groove formed thereon, a support portion having a spherical protrusion installed on the bridge pier and supporting the mounting portion, the mounting portion and the upper portion; It is provided between the inside of the body and provided with a buffer for cushioning and restoring the relative horizontal movement between the mounting portion and 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 a rectangular housing shape coupled to the upper plate to be slidably moved in an axial direction with respect to the upper plate. An upper body of the upper plate and the upper plate and the upper body is provided with a locking device for limiting the vibration in the axial direction, the lower portion of the upper body is provided with a spherical groove is formed, and the bridge piers It is installed on the support portion is provided with a spherical projection for supporting the mounting portion, and provided between the mounting portion and the inner side of the upper body buffer portion for cushioning and restoring the relative horizontal movement between the mounting portion and the upper body .

According to the base isolation base for bridges and its arrangement structure according to the present invention, it is possible to effectively cushion the horizontal impact load applied to the bridge by supporting the bridge using a spherical bridge base having excellent self-supporting strength.

Hereinafter, with reference to the accompanying drawings will be described in detail the base seismic bearing 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 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.

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 to accommodate expansion and contraction due to the constant temperature change as the compression rigidity of the cushioning member in the horizontal omnidirectional direction. At the same time, it acts as an elastic fixing against the displacement and at the same time between the upper structure (10) and the bridge (30) generated during the earthquake 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 rectangular enclosure shape fixed to the upper structure 10 of a bridge, and a lower groove having a spherical shape formed under the upper body 110. And a support part 130 having a spherical protrusion so as to be supported by the bridge part 120, the bridge 30 of the bridge, and inserted into a groove formed in the mount part 120, and the support part 120 and It is provided between the inner side of the upper body 110 is provided with a plurality of buffers 140 for buffering and restoring the relative horizontal movement of the support 130 or the upper body (110).

The upper body 110 is a rectangular box shape in which a space is opened to the lower side, the upper portion is welded or welded to a sole plate (not shown) provided on the lower surface of the upper structure 10 of the bridge An upper plate 112 to be fastened to be bolted is formed, and a lower portion of the upper plate 112 is formed with a supporting wall 114 protruding downward along the lower outer circumferential surface of the upper plate 112.

In addition, a first sliding plate 116a made of stainless steel is provided on the inner surface of the upper plate 112 of the upper body 110 to attenuate friction with the mounting portion 120.

The mounting portion 120 is provided to contact the first sliding plate 116a 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 first friction plate 122 to attenuate the impact load in the horizontal direction by friction in contact with the first sliding plate 116a on the upper surface, the lower support portion 130 is provided The old groove 123 is formed.

On the other hand, a plurality of stoppers 124 fixed to the upper plate 112 by the front end bolt 125 is provided on the pair of sides facing the mounting portion 120 as described above. The stopper 124 is provided to resist horizontal loads such as constant wind loads, and the shear bolts 125 are damaged when excessive impact loads are applied to release the resistance against impact loads.

In addition, a plurality of shaft grooves 128 for inserting the fixed shaft 144 of the buffer 140 to be described later are formed on each side of the mounting portion 120, the fixed shaft 144 in the shaft groove 128 By inserting the shock absorbing unit 140 accommodates the displacement with compressive stiffness for the constant elastic displacement and restores the impact load during the earthquake.

The support 130 is seated and fixed to the bed block 32 is placed on top of the pier 30, the upper structure of the bridge is inserted into the old groove 123 of the mounting portion 120 is fixed to the upper body 110 It is for supporting (10) in the vertical direction.

The support portion 130 is provided in a cylindrical shape having a predetermined diameter and has a spherical protrusion 132 inserted into the spherical groove 123 of the mounting portion 120 at the upper end, and the bed block of the piers 30 at the lower end thereof. Coupling step 134 for coupling to 32 is formed.

Here, the spherical protrusion 132 is inserted into the spherical groove 123 of the mounting portion 120 to support the upper structure 10, by the dynamic load of the vehicle, the earthquake and sag of the upper structure 10 to the upper structure 10 When the biased load is applied to the upper structure 10 is to accommodate the rotation of the upper structure 10 in the state supporting the upper structure (10).

In addition, between the spherical protrusion 132 of the support 130 and the spherical groove 123 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 (133) This is more prepared.

On the other hand, in the coupling step 134 formed on the lower end of the support 130, a plurality of anchor sockets 135 to be fixed to the bed block 32 is placed on the pier 30, and to fix the anchor socket 135 A plurality of fixing bolts 136 are further provided.

One or more buffer units 140 are provided on each side between the support wall 114 and the mounting unit 120 of the upper body 110 to cushion and restore the relative impact loads of the upper body 110 and the support unit 130. It is for. The plurality of buffers 140 are respectively installed in different directions according to the installation direction and the buffering and seismic isolation direction, so that only one buffer unit 140 will be described below.

The shock absorbing part 140 is provided between the support wall 114 and the support part 130, and the shock absorbing member 142 of the polyurethane material and the shock absorbing member 142 which are provided in a cylindrical or polygonal column shape to perform a buffer and restoration. ) Is inserted into the shaft groove 128 formed in the mounting portion 120 and penetrates the fixing shaft 144 for inserting the shock absorbing member 142 outwardly into the mounting portion 120 and the end of the fixing shaft 144. A support end 146 fixed to prevent breakage of the shock absorbing member 142 and a second sliding plate 116b provided outside the support end 146 and provided on the support wall 114 of the upper body 110. The second friction plate 148 is provided.

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 Between the first friction plate 122 provided between the inner surface of the upper body 110 and the upper surface of the mounting portion 120, and the mounting portion 120 and the upper body 110, the impact load generated between the (30) A plurality of buffers 140 are provided to perform attenuation, buffering, and restoring functions.

In addition, the mounting portion 120 for supporting the upper body 110 is provided to resist the horizontal load such as the usual wind load by the stopper 124 with respect to the upper body 110, the stopper 124 when excessive impact load occurs ) Can be broken to perform the seismic isolation in all directions.

In addition, when the load biased to the upper structure 10 by the dynamic load of the vehicle, the earthquake and the deflection of the upper structure 10 is applied, the spherical protrusion 132 of the mounting portion 120 and the spherical protrusion 132 of the support 130. The upper structure 10 may be supported by the rotation of the upper structure 10.

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 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.

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, and serves as a free end in the direction of the bridge, and serves as a fixed end in the direction of the bridge. When 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 teaching.

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 202 fixed to the upper structure 10 of the bridge, and the upper body 210 of the rectangular housing shape that is movably coupled to the upper plate 202 in the axial direction. And, it is provided in the lower portion of the upper body 210, the mounting portion 220 is formed in the spherical (Spherical) groove, and to be inserted into the groove supported on the bridge piers 30 of the bridge and formed in the mounting portion 220 It is provided between the support portion 230 and the mounting portion 220 and the inner side of the upper body 210 having spherical protrusions to cushion and restore the relative horizontal movement of the support 230 or the upper body 210. A plurality of buffers 240 are provided.

The upper plate 202 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 210 to be described later Guide grooves 204 extending in the axial direction to be guided to the guide bar 217 is formed. In addition, a lower surface of the upper plate 202 is provided with a first sliding plate 206 made of stainless steel in contact with the first friction plate 218 provided on the upper surface of the upper body 210 to be described later.

The upper body 210 has a rectangular box shape in which a space to be opened downward is formed, the upper plate 212 to which the upper plate 202 is movably coupled, and the upper plate 212 along the outer circumferential surface of the upper plate 212. And a support wall 214 extending below.

Here, the upper plate 212 is formed in the upper center portion of the upper plate 212 is provided with a guide bar 217 for guiding the upper plate 202, both sides of the guide bar 217 is provided on the upper plate 202 A first friction plate 218 is provided in contact with the first sliding plate 206 to attenuate the impact load in the horizontal direction by friction.

In addition, a second sliding plate 216a made of stainless steel is provided on the inner surface of the upper plate 212 of the upper body 210 to attenuate friction with the mounting portion 220.

The mounting portion 220 is provided to contact the second sliding plate 216a 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 second friction plate 222 to attenuate the impact load in the horizontal direction by friction in contact with the second sliding plate 216a on the upper surface, the lower support portion 230 is provided The old groove 223 is formed.

On the other hand, a pair of opposite sides of the mounting portion 220 as described above is provided with a plurality of stoppers 224 fixed to the lower plate 212 by the front end bolt 225. The stopper 224 resists horizontal loads such as constant wind loads, and is provided such that the shear bolt 225 is broken when excessive impact loads are applied, thereby releasing resistance against impact loads.

In addition, a plurality of shaft grooves 228 for inserting the fixed shaft 244 of the buffer 240 to be described later is formed on each side of the mounting portion 220, the fixed shaft 244 in the shaft groove 228 By inserting the shock absorbing unit 140 accommodates the displacement with compressive stiffness for the constant elastic displacement and restores the impact load during the earthquake.

The support 230 is seated and fixed to the bed block 32 is placed on top of the pier 30, the upper structure of the bridge is inserted into the old groove 223 of the mounting portion 220 is fixed to the upper body 210 It is for supporting (10) in the vertical direction.

The support portion 230 is provided in a cylindrical shape having a predetermined diameter and has a spherical protrusion 232 inserted into the spherical groove 223 of the mounting portion 220 at the upper end, and the bed block of the piers 30 at the lower end thereof. Coupling step 234 for coupling to 32 is formed.

Here, the spherical protrusion 232 is inserted into the spherical groove 223 of the mounting portion 220 to support the upper structure 10, by the dynamic load of the vehicle, the earthquake and sag of the upper structure 10 to the upper structure 10 When the biased load is applied to the upper structure 10 is to accommodate the rotation of the upper structure 10 in the state supporting the upper structure (10).

In addition, between the spherical protrusion 232 of the support 230 and the spherical groove 223 of the mounting portion 220 to reduce the frictional force due to the rotation between the spherical protrusion and the spherical groove (PTFE) plate 233 This is more prepared.

On the other hand, in the coupling step 234 formed at the lower end of the support 230, a plurality of anchor sockets 235 and fixed to the anchor socket 235 to be fixed to the bed block 32 is placed on the piers 30 A plurality of fixing bolts 236 are further provided.

One or more shock absorbing parts 240 are provided on each side between the support wall 214 and the mounting part 220 of the upper body 210 to fully restore and restore the relative impact loads of the upper body 210 and the supporting part 230. It is to. The plurality of buffers 240 are respectively installed in different directions according to the installation direction and the shock absorbing and seismic isolation directions, so that only one buffer 240 will be described below.

The shock absorbing part 240 is provided between the support wall 214 and the support part 230, and the shock absorbing member 242 and the shock absorbing member 242 made of a polyurethane material provided in a cylindrical or polygonal column shape to perform a buffer and restoration. The shaft 228 is inserted into the shaft groove 228 formed in the mounting portion 220 to insert the shock absorbing member 242 to the mounting portion 220 to the outside, and to the end of the fixing shaft 244. A support end 246 fixed to prevent damage of the base isolation member 242 and a third sliding plate 216b provided outside the support end 246 and provided on the support wall 214 of the upper body 210. The third friction plate 248 is provided.

Thus, the teaching direction isolating base 200 having the configuration as described above, the upper plate 202 is provided to be movable in the axial direction along the guide bar 217 is 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 Attenuation and cushioning by the first friction plate 218 provided between the inner side of the upper body 210 and the upper surface of the mounting portion 220, the buffer unit 240 provided between the support 230 and the inner side of the upper body 210. Perform the action.

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 224 with respect to the upper body 210, the stopper 224 when excessive horizontal load is generated ) Can be broken to perform the seismic isolation in all directions.

In addition, when the load biased to the upper structure 10 by the dynamic load of the vehicle, the earthquake and the deflection of the upper structure 10 is applied, the spherical protrusion 232 of the mounting portion 220 and the spherical protrusion 232 of the support 230. The upper structure 10 may be supported by the rotation of the upper structure 10.

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

Figure 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.

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 pier and the 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.

Such, the forward-side isolation base 300 is the upper plate 302 fixed to the upper structure 10 of the bridge, and the upper body 310 of the rectangular housing shape that is movably coupled to the upper plate 302 in the axial direction. And a locking device 350 provided between the upper plate 302 and the upper body 310 to cushion vibrations generated between the upper plate 302 and the upper body 310, and a lower portion of the upper body 310. The support portion 320 is provided and the spherical groove is formed, and the support portion formed with a spherical protrusion so as to be supported by the bridge 30 of the bridge and inserted into the groove formed in the mounting portion 320 330 and a plurality of buffer parts 340 provided between the mounting part 320 and the inner side of the upper body 310 to cushion and restore the relative horizontal movement of the supporting part 330 or the upper body 310. .

The upper plate 302 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 310 to be described later Guide grooves 304 extending in the axial direction to be guided to the guide bar 318 is formed. In addition, on both sides of the upper plate 302 in the axial direction, a pair of locking jaws 306 for supporting both ends of the locking device 350 to be described later are provided to protrude toward the locking device 350.

The upper body 310 has a rectangular box shape in which a space that is opened downward is formed, the upper plate 312 to which the upper plate 302 is movably coupled, and the upper plate 312 along the outer circumferential surface of the upper plate 312. And a support wall 314 extending below.

Here, the upper plate 312 is formed in the upper central portion of the upper plate 312 is provided with a guide bar 318 for guiding the upper plate 302, the inner surface of the upper plate 312 of the upper body 310, and the support wall The first sliding plate 316a made of stainless steel is provided on the four inner side surfaces of the 314 to damp the friction between the mounting portion 320 and the buffer portion.

In addition, a pair of support protrusions 317 are provided on the outer circumferential surface of the support wall 314 to protrude in the outward direction of the support wall 314 to support the moving end of the locking device 350 to be described later on both sides of the axial direction. .

The locking device 350 is provided in a direction symmetrical to both ends of the upper plate 302 and the upper body 310 to exert a buffer against the impact force generated between the upper plate 302 and the upper body 310.

The lock device 350 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 first sliding plate 316a 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 first friction plate 322 to attenuate the impact load in the horizontal direction by friction in contact with the first sliding plate 316a on the upper surface, the lower support portion 330 is provided A spherical groove 323 to be inserted is formed.

On the other hand, a plurality of stoppers 324 fixed to the upper plate 312 lower by the front end bolt 325 is provided on the pair of sides facing the mounting portion 320 as described above. The stopper 324 is resistant to horizontal loads such as wind loads at all times, and is provided such that the shear bolt 325 is broken when an excessive impact load is applied, thereby releasing resistance against the impact load.

In addition, a plurality of shaft grooves 328 for inserting the fixed shaft 344 of the shock absorbing portion 340 to be described later is formed on each side of the mounting portion 320, the fixed shaft 344 in the shaft groove 328 By inserting the shock absorbing unit 140 accommodates the displacement with compressive stiffness for the constant elastic displacement and restores the impact load during the earthquake.

The support 330 is seated and fixed to the bed block 32 is placed on top of the pier 30, the upper structure of the bridge is inserted into the old groove 323 of the mounting portion 320 is fixed to the upper body 310 It is for supporting (10) in the vertical direction.

The support portion 330 is provided in a cylindrical shape having a predetermined diameter and the upper end is formed with a spherical protrusion 332 to be inserted into the spherical groove 323 of the mounting portion 320, the lower end of the bed block of the piers 30 ( Coupling step 334 for coupling to 32 is formed.

Here, the spherical protrusion 332 is inserted into the spherical groove 323 of the mounting portion 320 to support the upper structure 10, by the dynamic load of the vehicle, the earthquake and sag of the upper structure 10 to the upper structure 10 When the biased load is applied to the upper structure 10 is to accommodate the rotation of the upper structure 10 in the state supporting the upper structure (10).

In addition, between the spherical protrusion 332 of the support portion 330 and the spherical groove 323 of the mounting portion 320 to reduce the frictional force due to the rotation between the spherical protrusion and the spherical groove (PTFE) plate 333 This is more prepared.

On the other hand, in the coupling step 334 formed on the lower end of the support portion 330 a plurality of anchor sockets 335 and fixed to the anchor socket 335 to be fixed to the bed block 32 placed on the piers 30 A plurality of fixing bolts 336 are further provided.

One or more buffer parts 340 are provided at each side between the support wall 314 and the mounting part 320 of the upper body 310 to cushion and restore the relative impact loads of the upper body 310 and the support part 330. It is for. The plurality of buffers 340 are respectively installed in different directions according to the installation direction, the buffering direction, and the vibration isolation direction, so that only one buffer unit 340 will be described below.

The shock absorbing part 340 is provided between the support wall 314 and the support part 330 and the shock absorbing member 342 of the polyurethane material and the shock absorbing member 342 provided in a cylindrical or polygonal column shape to perform the buffer and restoration. A fixed shaft 344 inserted into the shaft groove 328 formed in the mounting portion 320 to insert the buffer member 342 outwardly into the mounting portion 320, and an end portion of the fixed shaft 344. A support end 346 fixed to prevent damage of the shock absorbing member 342 and a second sliding plate 316b provided outside the support end 346 and provided on the support wall 314 of the upper body 310. A second friction plate 348 is provided.

Thus, the omnidirectional isolating base 300 having the configuration as described above, the upper plate 302 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, during the earthquake is installed between the upper structure 10 and the bridge 30 of the bridge, when the impact load in the horizontal direction is applied to the bridge lock device 350 is fixed while the upper structure 10 and the bridge 30 The horizontal impact load generated between the first friction plate 322 provided between the inside of the upper body 310 and the upper surface of the mounting portion 320, and between the support portion 330 and the inside of the upper body 310 The buffer unit 340 provides attenuation, buffering, and restoring functions for the throttling and the teaching directions.

In addition, the mounting portion 320 for supporting the upper body 310 is provided by the stopper 324 with respect to the upper body 310 to resist horizontal loads such as the usual wind load, the stopper 324 when excessive impact load occurs ) Can be broken to perform the seismic isolation in all directions.

In addition, when a load biased to the upper structure 10 is applied due to the dynamic load of the vehicle, the earthquake and the deflection of the upper structure 10, the spherical protrusion 332 of the mounting part 320 and the spherical protrusion 332 of the support part 330. The upper structure 10 may be supported by the rotation of the upper structure 10.

Accordingly, the arrangement of the base isolation support for bridges according to 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.

8A to 8B are layout views showing the arrangement of the seismic isolator for bridges according to the present invention. Here, Figure 8a 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 base isolation bearing, Figure 8b is a layout of the base isolation bearing using the fixed-edge base bearing and omnidirectional base isolation bearing of the present invention. Structure.

First, referring to Figure 8a 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 generates and / or displaces (or moves) due to temperature and creep, an orthogonal isolating base 200 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 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 direction of the earthquake-proof base bearing 200 provided between the upper structure 10 and the first bridge 30a, the upper structure 10 and In the fixed end isolation base 100 provided between the second piers 30b, a damping effect is performed 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.

At this time, when the damping action by the fixed-side seismic support 100 is described, when the impact load in the horizontal direction occurs, the upper body 110 fixed to the upper structure 10 and the support supported by the support 130 Friction attenuation occurs between the parts 120, the buffer part 140 provided between the support wall 114 and the mounting part 120 of the upper body 110 repeats the compression and tensile deformation while the upper structure 10 ) And buffer the impact load generated between the second piers (30b).

In addition, the damping effect of the lateral seismic support 200 is described, when a horizontal impact load occurs, the throttle between the upper plate 202 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 230, friction attenuation occurs due to the horizontal impact in the direction of the teaching, the support wall 214 and the mounting of the upper body 210 The buffer unit 240 provided between the units 220 buffers and restores the impact load exerted between the upper structure 10 and the first piers 30a 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. 8B.

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.

At this time, when the damping action by the fixed-side seismic support 100 is described, when the impact load in the horizontal direction occurs, the upper body 110 fixed to the upper structure 10 and the support supported by the support 130 Friction attenuation occurs between the parts 120, the buffer part 140 provided between the support wall 114 and the mounting part 120 of the upper body 110 repeats the compression and tensile deformation while the upper structure 10 ) And buffer the impact load generated between 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, the throttle between the upper plate 302 fixed to the upper structure 10, and the upper body 310 Movement in the direction is fixed by the locking device 350.

Accordingly, friction attenuation occurs between the upper body 310 receiving the horizontal load from the upper plate 302 and the mounting part 320 supported by the support part 330, and the support wall 314 of the upper body 310. Shock absorbing force between the upper structure 10 and the first piers 30a while repeating compression and tensile deformation is provided between the buffer unit 340 and the mounting unit 320.

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)

An upper body of the rectangular box shape fixed to the upper structure of the bridge, A mounting portion provided below the upper body and having a spherical groove formed therein; A support part installed at the bridge pier and formed with a spherical protrusion supporting the mounting part; A buffer part provided between the mounting part and the inner side of the upper body to cushion and restore the relative horizontal movement between the mounting 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 and protruding downward of the upper plate to support the outer end of the buffer part; And a sliding plate provided on a lower surface of the upper plate and an inner surface of the support wall to be in contact with an outer end of the mounting portion and the buffer portion. The method of claim 1, The mounting portion has a friction plate provided in contact with the inner upper surface of the upper body on the top, and the groove is provided to insert the support portion in the lower, The support portion is seismic isolation base for bridges, characterized in that formed in the upper spherical protrusion is inserted into the groove. 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, wherein the buffer portion A cushion member of polyurethane material provided between the upper body and the mounting portion; A fixed shaft penetrating the buffer member and inserted into the mounting portion to the outside; A support end fixed to an end of the fixed shaft to prevent breakage of the buffer member; A seismic isolator for bridges, characterized in that the end of the support end is provided with a PTFE plate in contact with the inner side of the upper body. An upper plate fixed to the upper structure of the bridge, An upper body having a rectangular enclosure 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 support part installed at the bridge pier and formed with a spherical protrusion supporting the mounting part; A buffer part provided between the mounting part and the inner side of the upper body to cushion and restore the relative horizontal movement between the mounting 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 and protruding downward of the upper plate to support the outer end of the buffer part; And a sliding plate provided on a lower surface of the upper plate and an inner surface of the support wall to be in contact with an outer end of the mounting portion and the buffer portion. The method of claim 7, wherein The mounting portion has a friction plate provided in contact with the inner upper surface of the upper body on the top, and the groove is provided to insert the support portion in the lower, The support portion is seismic isolation base for bridges, characterized in that formed in the upper spherical protrusion is inserted into the groove. 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 the buffer portion A cushion member of polyurethane material provided between the upper body and the mounting portion; A fixed shaft penetrating the buffer member and inserted into the mounting portion to the outside; A support end fixed to an end of the fixed shaft to prevent breakage of the buffer member; A seismic isolator for bridges, characterized in that the end of the support end is provided with a PTFE plate in contact with the inner side of the upper body. An upper plate fixed to the upper structure of the bridge, An upper body having a rectangular enclosure 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 support part installed at the bridge pier and formed with a spherical protrusion supporting the mounting part; A buffer part provided between the mounting part and the inner side of the upper body to cushion and restore the relative horizontal movement between the mounting part and the upper body, The mounting portion has a friction plate provided in contact with the inner upper surface of the upper body at the upper portion, and the lower groove is provided with the support portion is inserted into the lower portion, the support portion is formed with a spherical protrusion is inserted into the sphere groove at the top, 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 and protruding downward of the upper plate to support the outer end of the buffer part; And a sliding plate provided on a lower surface of the upper plate and an inner surface of the support wall to be in contact with an outer end of the mounting portion and the buffer portion. delete The method of claim 13, 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 13, 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. The method of claim 13, wherein the buffer portion A cushion member of polyurethane material provided between the upper body and the mounting portion; A fixed shaft penetrating the buffer member and inserted into the mounting portion to the outside; A support end fixed to an end of the fixed shaft to prevent breakage of the buffer member; A seismic isolator for bridges, characterized in that the end of the support end is provided with a PTFE plate in contact with the inner side of the upper body.

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