JP5302764B2 - Sliding bearings for structures - Google Patents

Description

  The present invention is for a structure which is interposed between a lower structure such as a foundation and a bridge pier and an upper structure such as a building and a bridge girder and supports the upper structure so as to be movable in a horizontal direction with respect to the lower structure. Regarding sliding bearings.

  The sliding bearing prevents the collapse of the upper structure due to an earthquake or the like without transmitting the vibration of the ground due to the earthquake or the like to the upper structure such as a building or a bridge girder. In addition to the above, the sliding bearing used for the bridge absorbs the expansion and contraction of the bridge girder due to the temperature change by the sliding.

JP-A-10-73145 JP-A-11-81237

  By the way, if the upper structure is largely displaced with respect to the lower structure due to a large earthquake or the like, the sliding structure using simply sliding between flat surfaces may cause the upper structure to fall from the lower structure. Even if a drop-off prevention mechanism is provided to prevent such drop-off, a large vibration energy based on a large earthquake or the like is directly added to the drop-off prevention mechanism, and the drop-off prevention mechanism may be damaged. The drop-off prevention mechanism for large vibration energy is not always satisfactory because it is expensive to manufacture and requires a large space.

  The present invention has been made in view of the above points, and its object is to effectively absorb large vibration energy by converting vibration energy, which is large kinetic energy based on a large earthquake, etc., into potential energy. Thus, it is possible to provide a sliding bearing for a structure that can prevent the upper structure from falling off from the lower structure and that can be prevented from being damaged and that can reduce the manufacturing cost and the occupied space. There is.

  The sliding bearing for the structure of the present invention interposed between the lower structure and the upper structure is arranged on the upper structure side and extends parallel to the horizontal plane. The lower horizontal sliding surface which is arranged on the lower structure side so as to contact the upper horizontal sliding surface and receive the load of the upper structure through the upper horizontal sliding surface and which extends parallel to the horizontal plane. And a restoring force generating means for generating a restoring force with respect to the relative displacement in the horizontal direction of the upper structure with respect to the lower structure, the restoring force generating means sandwiching the horizontal sliding surface on the upper side with respect to the horizontal direction. And fixed to the lower structure with a pair of upper side sliding surfaces extending in the direction intersecting the horizontal plane and a lower horizontal sliding surface in the horizontal direction. Extending in the crossing direction A pair of lower side sliding surfaces that are slidably in contact with each of the upper side sliding surfaces of the pair, and one of the pair of upper side sliding surfaces and one of the upper side sliding surfaces. One elastic means for elastically supporting at least one of the lower-side cross-sliding surfaces slidably in contact with the surface at least horizontally, and a pair of upper-side cross-sliding surfaces At least one cross-sliding surface of the other cross-sliding surface and the lower cross-sliding surface slidably contacting the other cross-sliding surface is elastically displaceable at least horizontally And the other elastic means to support.

  According to the present invention, the upper horizontal sliding surface extending parallel to the horizontal plane is also applied to the lower horizontal sliding surface extending parallel to the horizontal plane. As a result of the surface contacting the lower crossing sliding surface extending in the crossing direction with respect to the horizontal plane, and the elastic means elastically supporting the crossing sliding surface so as to be displaceable in the horizontal direction, Prior to the occurrence of relative displacement in the horizontal direction of the structure, the load on the upper structure is received by the lower horizontal sliding surface via the upper horizontal sliding surface, and the upper cross sliding surface is moved to the lower side. The upper structure can be supported by the lower structure in contact with the cross sliding surface, and the horizontal displacement of the upper structure relative to the lower structure is less than a certain level in the horizontal direction. Via elastic deformation of elastic means The horizontal sliding surface on the lower side slides relative to the horizontal sliding surface on the upper side relative to the horizontal sliding surface on the upper side, and thus the horizontal direction of the upper structure relative to the lower structure is constant. Even in the following relative displacements, the load on the upper structure is received by the lower horizontal sliding surface via the upper horizontal sliding surface, and the upper sliding surface is in contact with the lower sliding surface. The upper structure can be supported by the lower structure, and when the horizontal displacement of the upper structure with respect to the lower structure exceeds a certain level, the elastic deformation of the elastic means on the cross sliding surface supported by the elastic means is reduced. Due to the reduction of the horizontal displacement due to the lower side, the lower side cross-sliding surface slides relative to the upper side cross-sliding surface, so that the upper structure has a certain horizontal direction or more relative to the lower structure. The relative displacement of the upper water The mutual contact between the sliding surface and the lower horizontal sliding surface is released, the upper horizontal sliding surface is separated from the lower horizontal sliding surface, and the upper structure is lifted. The vibrational energy that causes a certain relative displacement in the horizontal direction can be absorbed by the rising of the superstructure.

  Therefore, according to the present invention, the upper structure can be supported by the lower structure so as to be movable in the horizontal direction in a state in which the contact between the upper side sliding surface and the lower side sliding surface is always maintained. In addition to making the transition to ascending without causing a large impact, vibration energy, which is a large kinetic energy based on a large earthquake, etc. is converted into potential energy by moving the upper structure from the lower structure in the vertical direction. Can effectively absorb large vibrational energy and prevent large relative horizontal displacement between the upper structure and the lower structure based on such large vibrational energy, and thus the lower structure It is possible to prevent the superstructure from falling off, and to effectively use the large vibration energy based on a large earthquake, etc., eliminating the possibility of damage, and reducing the manufacturing cost and the occupied space. In order to obtain aim, damping effect can be expected due to frictional force at the contact of the opposing surfaces of the displacement surfaces.

  In the present invention, each of the pair of upper side sliding surfaces is inclined downwardly from each of the upper side horizontal sliding surfaces and extends in opposite directions, and each of the pair of lower side sliding surfaces is Even if they are inclined downward from the respective horizontal sliding surfaces on the lower side and extend in opposite directions, instead, they are inclined upward from the respective horizontal sliding surfaces on the upper side and extend in opposite directions. Each of the pair of lower side sliding surfaces may incline upward from each of the lower side horizontal sliding surfaces and extend in directions opposite to each other.

  In a preferred example of the present invention, the one elastic means includes one cross-sliding surface of the pair of upper-side cross-sliding surfaces and a lower cross-sliding surface slidably contacting the one cross-sliding surface. At least one cross-sliding surface is elastically pressed against the cross-sliding surface slidably contacting the at least one cross-sliding surface, and the other elastic means is a pair of upper side cross-sliding surfaces And sliding at least one of the cross-sliding surfaces of the other cross-sliding surface and the lower cross-sliding surface slidably in contact with the other cross-sliding surface onto the at least one cross-sliding surface It is elastically pressed against the intersecting sliding surface that freely contacts, and according to this preferred example, the upper structure can be preferably fixed in a small vibration region.

  In a preferred example, the sliding bearing for a structure of the present invention is for a bridge in which the upper structure is a bridge girder and the lower structure is a bridge pier, and a pair of upper side sliding surfaces and a pair of lower side Each of the intersecting sliding surfaces is fixed to each of the upper structure and the lower structure with the horizontal sliding surface on the upper side and the horizontal sliding surface on the lower side in between in the bridge axis direction.

  According to the present invention, it is possible to make a transition to a rise of a superstructure without causing a large impact in a large earthquake or the like, and to convert vibration energy, which is a large kinetic energy based on such a large earthquake or the like, into potential energy. It can be converted to effectively absorb large vibration energy, and thus the upper structure can be prevented from falling off from the lower structure, and there is no risk of damage, and the manufacturing cost and the occupied space can be reduced. It is possible to provide a sliding bearing for a possible structure.

It is side explanatory drawing of the preferable example of this invention. It is plane explanatory drawing by the side of the pier of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG.

  The sliding bearing for a structure according to the present invention has a structure in which an upper horizontal sliding surface is placed on a lower horizontal side before a relative displacement of the upper structure such as a bridge girder with respect to a lower structure such as a bridge pier occurs, for example, in the bridge axis direction. The upper cross-sliding surface is brought into contact with the lower cross-sliding surface, and the upper structure such as a bridge girder with respect to the lower structure such as a bridge pier is elastic up to a large relative displacement in the bridge axis direction, for example. The upper horizontal sliding surface is brought into contact with the lower horizontal sliding surface while the upper side sliding surface is kept in contact with the lower cross sliding surface by elastic deformation of the means, while the upper structure with respect to the lower structure For example, in the case of a large relative displacement in the direction of the bridge axis, it is based on sliding contact movement (sliding) between the upper side sliding surface and the lower side sliding surface due to a decrease in elastic deformation of the elastic means or the elastic deformation limit. Lower side of upper horizontal sliding surface Of by releasing the contact with the horizontal sliding surface in which the upper structure was set to raise the movement from the lower structure in the vertical direction.

  Next, an example of an embodiment of the present invention will be described in more detail based on the drawings. The present invention is not limited to these examples.

  1 and 2, a sliding bearing 1 for a bridge as a structure according to the present embodiment is configured so that a bridge girder 3 as an upper structure is bridged in a bridge axis direction H (hereinafter referred to as a lower structure) with respect to a pier 2 as a lower structure. In order to support the movably in the H direction), it is interposed between the pier 2 and the bridge girder 3.

  The sliding bearing 1 is fixed to the lower surface 4 of the bridge girder 3 on the upper surface via a mounting plate 5 fixed to the lower surface 4 of the bridge girder 3 with bolts or the like, and has an upper horizontal sliding surface 6 on the lower surface. The sliding plate 7 is in contact with the horizontal sliding surface 6 so as to be slidably movable in the H direction, and the vertical direction V (hereinafter referred to as V direction) of the bridge girder 3 through the horizontal sliding surface 6, the sliding plate 7 and the mounting plate 5. ) And a restoring force generating means for generating a restoring force with respect to the relative displacement in the H direction of the bridge girder 3 with respect to the pier 2. 10.

  The pier 2 includes a horizontal upper surface 11 extending flat in parallel with the horizontal plane, and an inclined upper surface 12 extending in the A direction and the B direction, which are intersecting directions with respect to the horizontal plane, continuously from both ends of the horizontal upper surface 11 in the H direction. The inclined upper surfaces 12 and 13 are arranged and formed symmetrically with respect to the H direction with the horizontal upper surface 11 as the center, and the lower surface 4 of the bridge girder 3 extends flat in parallel to the horizontal plane. Yes. In this example, the A direction and the B direction have an angle α of 20 °, which is one angle in the range of angle α = 5 ° to 45 ° with respect to the horizontal plane. It is not limited.

  The horizontal sliding surface 6 arranged on the bridge girder 3 side extends flat in parallel to the horizontal plane so that it touches the horizontal horizontal sliding surface 6 and receives the load of the bridge girder 3 through the horizontal horizontal sliding surface 6. The horizontal sliding surface 8 arranged on the pier 2 side extends flat in parallel to the horizontal surface like the horizontal sliding surface 6, and the sliding plate 9 is attached to the horizontal upper surface 11 of the pier 2 via anchor bolts 15 or the like. The support base 16 is fixed to the recess 17 so as to be movable in the V direction. The recess 17 defines the bottom surface of the recess 17 in the recess 17 and the sliding plate 9. A disc-shaped elastic member 20 made of natural rubber or synthetic rubber is disposed between the lower surface 19 and the concave surface 18 so as to be detachably contacted or vulcanized and bonded, and made of natural rubber or synthetic rubber. Is a bridge pier via the sliding plate 9 and the support base 16 in a state where the elastic member 20 is pressed. A circle for preventing rainwater and dust from entering the recess 17 between the horizontal sliding surface 6 of the sliding plate 7 and the upper surface 21 of the supporting base 16. A seal ring 22 made of an annular elastic body is disposed so as to surround a portion of the sliding plate 9 that protrudes from the upper surface 21 to the outside of the recess 17.

  Each of the sliding plates 7 and 9 is made of a synthetic resin having a low friction characteristic such as a polytetrafluoroethylene resin or a synthetic resin containing a reinforcing material in which a reinforcing material such as glass fiber and organic fiber is mixed into the synthetic resin. .

  The restoring force generating means 10 is fixed to the bridge girder 3 with the horizontal sliding surface 6 in between with respect to the H direction, and a pair of upper side sliding surfaces 31 extending in the A direction and the B direction that are crossing the horizontal plane and A pair of sliding plates 33 and 34 having 32 and a horizontal sliding surface 8 with respect to the H direction and being fixed to the pier 2 and extending in the A direction and the B direction intersecting with the horizontal plane, The sliding plates 37 and 38 having a pair of lower sliding surfaces 35 and 36 that are slidably in contact with the cross sliding surfaces 31 and 32 in the A direction and the B direction, respectively, At least one of the cross-sliding surfaces, of the cross-sliding surface 31 in this example, and the cross-sliding surface 35 on the lower side that slidably contacts the one cross-sliding surface 31 in the A direction. In this example, crossed sliding surface 3 One elastic means 39 that elastically displaceably supports at least the H direction, in this example, the C direction including the H direction and the V direction, that is, the C direction orthogonal to the A direction, At least one of the cross-slide surfaces of the other cross-slide surface, in this example, the cross-slide surface 32 and the lower cross-slide surface 36 slidably contacting the other cross-slide surface 32 in the B direction. In the present example, the other elastic means that elastically supports the cross sliding surface 36 so as to be displaceable in at least the horizontal direction H direction, in this example, the D direction including the H direction and the V direction, that is, the D direction orthogonal to the B direction. 40, and a support base 47 for fixing the sliding plate 33 to the bridge girder 3 and the flanges 48 and 49 and the sliding plate 34 as well as the support base 47. Support base 50 for fixing the frame to the bridge girder 3 and a sliding plate 7 and the elastic means 39, and the support base 56 fixed to the inclined upper surface 13 of the pier 2 by the anchor bolt 55, the sliding plate 38 and the elastic means 40, and the inclined upper surface 13 of the pier 2 are supported. And a support base 62 fixed to the base with an anchor bolt 61.

  Each of the sliding plates 33, 34, 37 and 38 is a synthetic resin having a low friction characteristic such as polytetrafluoroethylene resin or a synthetic resin containing a reinforcing material in which a reinforcing material such as glass fiber and organic fiber is mixed in the synthetic resin. In addition, when a damping effect due to frictional force is expected, it may be made of, for example, a braking material having high friction characteristics.

  A sliding plate 33 having an intersecting sliding surface 31 inclined downward from the horizontal sliding surface 6 on the upper side and extending in the direction A opposite to the intersecting sliding surface 32 is attached to the flange 46 via a bolt or the like. A sliding plate 34 that is fixed to the substrate 71 and has a crossing sliding surface 32 that is inclined downward from the horizontal sliding surface 6 side on the upper side and extends in the B direction opposite to the crossing sliding surface 31 is attached to the flange portion 49. It is fixed to a substrate 72 attached via bolts or the like.

  A disc-shaped slide plate 37 having a cross slide surface 35 inclined downward from the horizontal slide surface 8 on the lower side and extending in the direction A opposite to the cross slide surface 36 is formed on the upper surface 75 of the support base 56. The formed recess 76 is mounted so as to partially protrude from the upper surface 75 to the outside of the recess 76 so as to be movable in the C direction, and is inclined downward from the horizontal sliding surface 8 on the lower side to cross the sliding surface 35. A disc-shaped sliding plate 38 having a crossed sliding surface 36 extending in the opposite direction extends from a top surface 77 of the support base 62 to the outside of the concave portion 78. It is mounted so as to be movable in the direction D, and an annular shape between the cross sliding surface 31 of the sliding plate 33 and the upper surface 75 of the support base 56 is used to prevent rainwater and dust from entering the recess 76. A seal ring 79 made of an elastic body is disposed so as to surround the protruding portion of the sliding plate 37. Further, between the cross sliding surface 32 of the sliding plate 34 and the upper surface 77 of the support base 62, there is a seal ring 80 made of an annular elastic body for preventing rainwater and dust from entering the recess 78. The protruding portion of the sliding plate 38 is disposed so as to surround it.

  The elastic means 39 detachably contacts the recess surface 85 between the recess surface 85 of the support base 56 that defines the bottom surface of the recess 76 and the lower surface 86 of the sliding plate 37 at the recess 76. Or a disc-shaped elastic member 87 made of natural rubber or synthetic rubber or the like that is vulcanized and bonded, and the elastic means 40 is similar to the elastic means 39 in the recess 78. Natural rubber disposed between the recessed surface 88 of the support base 62 defining the bottom surface of 78 and the lower surface 89 of the sliding plate 38 so as to be detachably simply contacted or vulcanized and bonded. Or it has the disk-shaped elastic member 90 which consists of synthetic rubbers.

  The elastic means 39 includes one cross-sliding surface 31 of a pair of upper-side cross-sliding surfaces 31 and 32 and a lower cross-sliding surface 35 that slidably contacts the one cross-sliding surface 31 in the A direction. At least one of the cross-sliding surfaces, in this example, the cross-sliding surface 35 is elastically pressed against the cross-sliding surface 31 slidably contacting the cross-sliding surface 35 in the A direction.

  The elastic means 40 includes the other cross-sliding surface 32 of the pair of upper-side cross-sliding surfaces 31 and 32 and the lower cross-sliding surface 36 that slidably contacts the other cross-sliding surface 32 in the B direction. And, in this example, the cross-sliding surface 36 is elastically pressed against the cross-sliding surface 32 slidably contacting the cross-sliding surface 36 in the B direction.

  In the restoring force generating means 10, the cross sliding surface 31, the sliding plate 33, the cross sliding surface 35, the sliding plate 37, the elastic means 39, the support base 47 and the support base 56, the cross sliding surface 32, the sliding plate 34, the crossing The sliding surface 36, the sliding plate 38, the elastic means 40, the support base 50, and the support base 62 are disposed and formed symmetrically with respect to the H direction with the horizontal upper surface 11 as the center.

  Each of the pair of upper side sliding surfaces 31 and 32 and the pair of lower side sliding surfaces 35 and 36 sandwiches the upper horizontal sliding surface 6 and the lower horizontal sliding surface 8 in the H direction between the bridge girder 3. The above-mentioned sliding bearing 1 fixed to each of the bridge piers 2 includes an upper horizontal sliding surface 6 extending parallel to the horizontal plane and a lower horizontal sliding surface 8 extending parallel to the horizontal plane. The upper cross sliding surfaces 31 and 32 extending in the B direction and the lower cross sliding surfaces 35 and 36 extending in the A and B directions are in contact with the elastic members 87 and 90 of the elastic means 39 and 40, respectively. As a result of each elastically supporting each of the sliding surfaces 35 and 36 in the C and D directions so as to be displaceable, the horizontal slippage before the occurrence of the relative displacement in the H direction of the bridge girder 3 with respect to the pier 2 occurs. Load on bridge girder 3 via surface 6 The bridge girder 3 can be supported by the bridge pier 2 with the horizontal sliding surface 8 and the cross sliding surfaces 31 and 32 in contact with the cross sliding surfaces 35 and 36, respectively, for example, as shown in FIG. In one relative displacement in the H direction of the bridge girder 3 with respect to the pier 2 based on the expansion and contraction of the bridge girder 3 due to temperature change, the elastic means 39 of the cross sliding surface 35 supported by the elastic member 87 of the elastic means 39. The displacement in the C direction through the elastic deformation of the elastic member 87, in other words, the decrease in the thickness of the elastic member 87 in the C direction, that is, a larger amount of the elastic member 87 into the recess 76 of the sliding plate 37 due to the elastic compression. The horizontal sliding surface 6 slides relative to the horizontal sliding surface 8 in one direction in the H direction with the displacement in the C direction of the cross sliding surface 35 due to the approach, while the thickness of the elastic member 90 in the D direction increases. That is, the elastic member 9 With the elastic extension, the cross-sliding surface 32 is separated from the cross-sliding surface 36 and the contact between the cross-sliding surface 32 and the cross-sliding surface 36 is released. The same applies to the other relative displacement of the bridge girder 3 with respect to the pier 2 due to an earthquake or a change in temperature due to temperature changes. Even in the following relative displacement, the load of the bridge girder 3 is received by the lower horizontal sliding surface 8 via the upper horizontal sliding surface 6, and the upper cross sliding surface 31 or 32 becomes the lower cross sliding surface. The bridge girder 3 can be supported by the pier 2 in contact with 35 or 36, and the vibration or displacement of the bridge girder 3 in the H direction relative to the pier 2 based on the expansion and contraction of the bridge girder 3 due to a small earthquake or temperature change is applied to the horizontal sliding surface 8. water Allowed by sliding in the H direction of the flat sliding surface 6 to prevent transmission of vibration in the H direction of the pier 2 to the bridge girder 3 due to small earthquakes, etc., and excessive load in the H direction on the bridge girder 3 in small earthquakes, etc. Is prevented, and the displacement of the bridge girder 3 in the H direction based on the expansion and contraction of the bridge girder 3 due to the temperature change is prevented from being transmitted to the pier 2. Thus, the bending vibration of the bridge girder 3 in the V direction due to traveling of the automobile is allowed by elastic expansion and contraction of the elastic members 20, 87 and 90.

  In a large earthquake or the like, for example, as shown in FIG. 4, in the relative vibration displacement in one direction in the H direction of the bridge girder 3 with respect to the pier 2 in a certain direction, the cross sliding surface 35 supported by the elastic member 87 of the elastic means 39 is used. Reduction in elastic deformation of the elastic member 87 of the elastic means 39 or reduction in displacement in the C direction due to the limit of elastic deformation, in other words, the slip of the sliding plate 37 due to the stop of thickness reduction in the elastic member 87 in the C direction. By stopping the displacement of the cross-sliding surface 35 in the C direction due to the stop of entering the recess 76, the lower cross-sliding surface 35 slides relative to the upper cross-sliding surface 31 in the A direction. In the relative displacement of the bridge girder 3 with respect to the pier 2 in one direction of a certain direction in the H direction, the mutual contact between the horizontal sliding surface 6 on the upper side and the horizontal sliding surface 8 on the lower side is released and the upper side Horizontal sliding surface 6 is at the bottom As a result of the bridge girder 3 being lifted away from the horizontal sliding surface 8, vibration energy that causes a relative displacement of the bridge girder 3 in the H direction with respect to the pier 2 to be more than a certain level can be absorbed by the bridge girder 3. After the ascent, the bridge girder 3 is lowered through the slip between the inclined surface 31 and the inclined surface 35 by the relative vibration displacement in the other direction in the H direction, and the V direction from the horizontal sliding surface 8 of the horizontal sliding surface 6 The contact of the horizontal sliding surface 6 with the horizontal sliding surface 8 is recovered by releasing the separation of the horizontal sliding surface 6, and the same applies to the relative vibration displacement in the other direction in the H direction of the bridge girder 3 with respect to the pier 2 in a certain H direction. Thus, relative displacement of the bridge girder 3 with respect to the bridge girder 3 in a certain direction in the H direction in mutual contact between the horizontal sliding surface 6 and the inclined surfaces 31 and 32 and the horizontal sliding surface 8 and the inclined surfaces 35 and 36. Based on large earthquakes that cause So as not to cause a relative displacement of the excessive H direction of the bridge girder 3 by converting vibration energy is deal of kinetic energy and potential energy of the friction energy and the bridge girder 3 for the pier 2.

  Therefore, according to the sliding bearing 1, the contact between the upper cross-slide surface 31 and the lower cross-slide surface 35 or the contact between the upper cross-slide surface 32 and the lower cross-slide surface 36 is always maintained. In this state, the bridge girder 3 can be supported by the pier 2 so as to be movable in the H direction, and the transition of the bridge girder 3 to the upward movement in the V direction can be performed without causing a large impact. A certain vibration energy can be converted into potential energy by moving upward in the V direction from the pier 2 of the bridge girder 3 to effectively absorb a large vibration energy, and the relative between the bridge girder 3 and the pier 2 based on such a large vibration energy. It is possible to prevent a large displacement in the H direction, and to prevent the bridge girder 3 from falling off from the pier 2 and to effectively use large vibration energy based on a large earthquake or the like, thereby eliminating the possibility of damage. In addition, the manufacturing cost can be reduced and the space occupied can be reduced, and a damping effect due to frictional force can be expected. Also, by appropriately setting the angle α, the conversion characteristics of kinetic energy into potential energy and the pier 2 Plasticization can be controlled arbitrarily.

  In the sliding bearing 1 described above, the restoring force is generated in the H direction which is the bridge axis direction. However, the present invention is not limited to this. For example, for the pier 2 as a substructure. The sliding support of the present invention is interposed between the bridge pier 2 and the bridge girder 3 so as to support the bridge girder 3 as the superstructure movably in the direction perpendicular to the bridge axis perpendicular to the H direction in the horizontal direction. Thereby, a restoring force may be generated in a direction perpendicular to the bridge axis perpendicular to the H direction.

DESCRIPTION OF SYMBOLS 1 Sliding bearing 2 Bridge pier 3 Bridge girder 4,19 Lower surface 5 Mounting plate 6, 8 Horizontal sliding surface 7 Sliding plate 9 Sliding plate 10 Restoring force generation means 11 Horizontal upper surface 12, 13 Inclined upper surface 15, 55, 61 Anchor bolt 16, 47, 50, 56, 62 Support base 17, 76, 78 Recess 18, 85, 88 Recess surface 20, 87, 90 Elastic member 21 Upper surface 22 Seal ring 31, 32, 35, 36 Cross sliding surface 33, 34, 37 , 38 Sliding plate 39, 40 Elastic means 45, 46, 48, 49

Claims (4)

A sliding bearing for a structure interposed between a lower structure and an upper structure, which is disposed on the upper structure side and extends parallel to the horizontal plane, and an upper horizontal sliding surface A lower horizontal sliding surface which is arranged on the lower structure side so as to contact the horizontal sliding surface on the side and receive the load of the upper structure via the upper horizontal sliding surface and which extends parallel to the horizontal plane; Restoring force generating means for generating a restoring force against the horizontal displacement of the upper structure relative to the lower structure, the restoring force generating means sandwiching the horizontal sliding surface on the upper side in the horizontal direction. Fixed to the upper structure and extended to the horizontal plane in a direction intersecting with the horizontal plane, and fixed to the lower structure with the horizontal sliding plane on the lower side in the horizontal direction between and fixed to the horizontal plane. One that extends in the cross direction A pair of lower-side cross-sliding surfaces that are slidably in contact with each of the upper-side cross-sliding surfaces, one cross-sliding surface of the pair of upper-side cross-sliding surfaces, and the one cross-sliding surface One elastic means for elastically supporting at least one of the lower-side cross-sliding surfaces slidably in contact with the lower-side cross-sliding surface at least horizontally, and a pair of upper-side cross-sliding surfaces Elastically supports at least one cross-sliding surface of the other cross-sliding surface and a lower cross-sliding surface slidably in contact with the other cross-sliding surface at least horizontally. The other elastic means, and the one elastic means is one of the pair of upper side sliding surfaces and the lower side that is slidably in contact with the one side sliding surface. At least one of the intersecting sliding surfaces The differential sliding surface is elastically pressed against the cross sliding surface that is slidably in contact with the at least one cross sliding surface, and the other elastic means is the other of the pair of upper cross sliding surfaces. A cross-slip that slidably contacts at least one cross-sliding surface of the sliding surface and a lower cross-sliding surface that slidably contacts the other cross-sliding surface with the at least one cross-sliding surface A sliding bearing for structures that are elastically pressed against a surface .   Each of the pair of upper side sliding surfaces is inclined downwardly from each of the upper side horizontal sliding surfaces and extends in opposite directions, and each of the pair of lower side sliding surfaces is on the lower side. The sliding bearing for a structure according to claim 1, wherein the sliding bearing is inclined downward from each of the horizontal sliding surfaces and extends in opposite directions.   Each of the pair of upper side sliding surfaces is inclined upwardly from each of the upper side horizontal sliding surface sides and extends in opposite directions, and each of the pair of lower side sliding surfaces is on the lower side. 2. A sliding bearing for a structure according to claim 1, wherein the sliding bearing is inclined upward from each of the horizontal sliding surfaces and extends in opposite directions. The upper structure is a bridge girder and the lower structure is a bridge pier, and each of the pair of upper side sliding surfaces and the pair of lower side sliding surfaces is in the direction of the bridge axis. The structure according to any one of claims 1 to 3, wherein the structure is fixed to each of the upper structure and the lower structure with the horizontal sliding surface on the upper side and the horizontal sliding surface on the lower side in between. Sliding bearing for.

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