JPH11241750A - Sliding type elastic support device for structure and high supporting pressure load supporting member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent shearing of a rubber layer even by a high load from an upper part without activating unreasonable shearing stress of a horizontal direction at the time of the earthquake on a load supporting member by slidably supporting an upper structure by the load supporting member and the like for high supporting pressure. SOLUTION: In an elastic support device for a structure arranged between an upper structure 1 and a lower structure 2, either one of steel plate 9 in steel plates 9, 10 in an elastic support body 5 provided with the steel plates 9, 10 vertically is nonmoveably locked with either one of structures in the upper structure 1 or the lower structure 2 directly or indirectly, the other steel plate 10 in the elastic support body 5 is directly or indirectly locked with the locked structure side movably in a vertical direction and nonmovably in a lateral direction, the outer side of the other steel plate 10 is formed as a surface for supporting the upper structure 1 or the lower structure 2 of a non-locking condition freely to slide at all times. An interface sucked with an elastic layer 6 in each steel plate 9, 10 of the elastic support body 5 is formed as a rough surface so as to enlarge a sticking surface, and increase shearing resistance force of the rubber layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding elastic bearing device for various structures such as bridges and buildings, and a high bearing load supporting member used for the device.

[0002]

2. Description of the Related Art Various structures such as bridges and buildings are supported by rubber bearings (reaction-bearing bearings, seismic isolation bearings, etc.). Since such functions are also required, the planar dimensions and rubber thickness of the bearing device are increased, and the conventional rubber bearing has caused problems in design, manufacturing, durability, workability, and economy. Also, in terms of the overall structure, problems such as an increase in vibration and acceleration of fatigue of the steel bridge have been pointed out. Conventionally, as an elastic bearing device using an elastic bearing body such as rubber, one of an upper side and a lower side (for example, an upper side) of an elastic bearing device is attached to an upper structure, and the other (for example, an elastic bearing device). To the lower structure,
There is known an elastic bearing device which is expected to have the following effects (1) to (3). (1) The function of elastically supporting the load of the upper structure by an elastic body such as rubber, and the function of transmitting the load while buffering the lower structure (hereinafter, simply referred to as load support function). (2) An operation of supporting the structure while allowing the elastic support to rotate against the deflection of the upper structure (that is, the rotation of the upper structure when viewed from the side of the support serving as a fulcrum) (hereinafter simply referred to as a rotation support operation). . (3) An operation of supporting while allowing relative displacement in the horizontal direction of the upper structure and the lower structure by horizontal shear deformation of the rubber (hereinafter simply referred to as a shear bearing operation). In particular, there are known many technical ideas of supporting the upper structure and the lower structure while they are relatively displaced in the horizontal direction while buffering them by shearing deformation of an elastic body such as rubber. However, in the case of the conventional bearing device, even if the elastic body is subjected to shear deformation while supporting the upper structure, the above-mentioned (1)
It is necessary to satisfy the effects of (2) and (2), and it is necessary to design in consideration of all the loads (1) to (3) acting on the elastic body. In addition to the problem that the size becomes large, there is a problem that a relatively high bearing stress cannot be applied to the relatively elastic body. In addition, it is necessary to sufficiently reflect the fatigue of the elastic layer in the design because the structure is such that the elastic body such as rubber is subjected to repeated shear deformation in response to the expansion and contraction of a girder or the lateral displacement during an earthquake. It is also known to temporarily slide the elastic bearing when pre-shearing deformation or post-shearing deformation is performed, but in any case, after the installation, the large shear deformation of the elastic body is basically required. Is always allowed, so that the structure type is basically different from the case where the shear deformation is not always allowed in the case of the present invention. Further, when the elastic bearing body is subjected to preliminary shear deformation or post-shear deformation, there is a problem that the installation work becomes complicated, the device becomes complicated, and a high degree of skill is required.

[0003] In the case of a steel bearing device, a hemispherical bearing surface is provided on the upper portion in order to provide the rotary bearing function of (2) among the bearing functions (1) to (3). It is necessary to adopt a structure in which a lower supporting member made of steel and an upper supporting member having a hemispherical convex portion at the lower portion and an upper structure supporting portion at the upper portion are fitted to each other, so that the supporting height is increased (thickened). There is a problem that the structure is complicated.

[0004]

SUMMARY OF THE INVENTION The present invention has been developed for the purpose of improving the above-mentioned problems.
The function (3) of the above-mentioned bearing operations (1) to (3), that is, the upper structure or the lower structure, which is made to always stop the shear deformation bearing operation and to be always supported by the elastic bearing device, An elastic bearing device which is relatively permanent and slidable at all times during and after construction, and which can bear a relatively high bearing stress on the elastic bearing body, and a load bearing member for high bearing force used in the elastic bearing device. The purpose is to provide.

[0005]

In order to achieve the above-mentioned object, in a sliding elastic support device for a structure according to the present invention, an elastic structure for a structure disposed between an upper structure and a lower structure is provided. In the bearing device, any one of the steel plates in the elastic bearing body having a steel plate at the top and bottom is immovably locked directly or indirectly to any one of the upper structure and the lower structure, The other steel plate of the elastic bearing body is directly or indirectly locked on the locked structure side so as to be movable in the vertical direction and immovable in the lateral direction, and the outside of the other steel plate is not locked. The upper structure or the lower structure in the state is always slidably supported, and the bonding interface between the elastic supporting body and the elastic layer of each steel plate is roughened to enlarge the bonding surface and the rubber layer. Shear resistance Wherein the increased. Further, in the sliding elastic bearing device for a structure according to the present invention, in the elastic bearing device for a structure disposed between the upper structure and the lower structure, the upper steel plate and the lower steel plate are integrated via an elastic layer. The lower steel plate in the elastic bearing body having is fixed to the upper surface of the lower support member fixed to the lower structure so as not to be laterally movable, and the other upper steel plate is provided on the lower support member side with respect to the lower support member. The upper structure is supported so as to be slidable in the horizontal direction at all times via a sliding support having a sliding surface provided on an upper part of the upper steel plate so as to be movable relatively vertically and immovably in the horizontal direction. The elastic bearing body is characterized in that the bonding interface with the elastic layer in each steel plate of each steel plate is roughened, so that the bonding surface is enlarged and the shear resistance of the rubber layer is increased, so that the bearing is used under a high bearing stress. And

In the slide type elastic bearing device for a structure according to the present invention, the lateral movement and shearing of the high bearing load supporting member mounted on the base plate are performed by the shear restraint wall rising from the base plate installed on the lower structure. Deformation is constrained, and the upper surface of the upper fitting support member mounted on the rubber layer of the high bearing load supporting member is provided so as to protrude from the top of the shear restraint wall. On the upper surface of the upper fitting support member,
An adhesive interface between a rubber layer of an upper fitting support member and a lower fitting support member which slidably supports a sole plate attached to an upper structure and which is mounted above and below a rubber layer of the high bearing load support member. By making the surface rough, the adhesive surface is enlarged and the shear resistance of the rubber layer is increased, so that it is used under a high bearing stress.

In the high bearing load supporting member according to the present invention, an annular concave portion is formed on the outer peripheral surface of the rubber layer, and an upper fitting supporting member and a lower fitting supporting member mounted on the upper and lower portions of the rubber layer. The member is provided with a reaction wall for restraining a horizontal shear force due to a high bearing stress of the rubber layer, and a bonding surface of a hard plate such as a reinforcing steel plate embedded in the rubber layer with the rubber layer is roughened. In this case, the adhesive surface is enlarged and the shear resistance of the rubber layer is increased, so that the rubber layer is used under a high bearing stress. Further, in the high bearing load supporting member according to the present invention, an annular concave portion is formed on the outer peripheral surface of the rubber layer by R processing, and an upper fitting supporting member and a lower fitting supporting member mounted on the upper and lower portions of the rubber layer. The member is provided with a reaction wall that restrains the horizontal shear force due to the high bearing stress of the rubber layer, and the thickness of the reinforcing steel sheet embedded in the rubber layer is increased,
The method is characterized in that the bonding interface with the rubber layer is roughened to enlarge the bonding surface and increase the shear resistance of the rubber layer. In the high bearing load supporting member according to the present invention,
In order to relieve stress concentration on the outer peripheral surface of the rubber layer, an annular recess is formed by R processing, and the internal stress of the rubber layer due to a high bearing stress is widely distributed to suppress excessive local distortion. At least one or more hard plates such as reinforced steel plates having rough surfaces on both front and back surfaces are embedded in the rubber layer, and an upper fitting support member and a lower fitting support member attached to the upper and lower portions of the rubber layer are provided with a machine. A reaction wall for restraining a shear force acting on the adhesive surface is provided.

Further, according to the sliding elastic bearing device for a structure according to the present invention, in the elastic bearing device for a structure disposed between the upper structure and the lower structure, the upper steel plate and the lower plate are provided via an elastic layer. The lower steel plate in the elastic body integrally including the steel plate is fixed to the lower structure, and the other upper steel plate can be vertically moved relative to the lower steel plate by the shear constraint wall provided on the lower steel plate. The upper structure is supported so as to be always slidable in the lateral direction via a slide bearing material having a sliding surface provided on the upper steel plate, and the upper steel plate and the lower steel plate The method is characterized in that the bonding interface with the rubber layer is roughened to enlarge the bonding surface and increase the shear resistance of the rubber layer. Further, in the sliding elastic bearing device for a structure according to the present invention, by the shear restraint wall composed of a columnar member provided in the center of the lower steel plate,
The other upper steel plate is engaged with the lower steel plate so as to be movable in the vertical direction and immovable in the horizontal direction.

According to the present invention, since the elastic body does not always function as a shear bearing, fatigue due to repeated relatively large shear deformation caused by the lateral displacement of the elastic body does not occur. In addition, since the upper structure can always be slidably supported while the load bearing function and the rotating bearing function are functioning, the elastic bearing device can be used even if seismic force acts during construction as well as after construction of the upper structure. The superstructure can be supported without exerting excessive lateral support force, and it does not undergo shear deformation, so it can be used under high bearing stress, so that the elastic body can be downsized. The elastic layer of the load-bearing member is indirectly restrained from lateral movement and shear deformation by the shear restraint wall via a hard member such as steel, so that an unreasonable lateral external force acts directly on the elastic layer. Therefore, the shear deformation of the elastic layer can be reliably restrained. Further, since the high bearing load support member is restrained from lateral movement and shear deformation by the shear restraint wall rising from the base plate, no shear deformation occurs in the rubber layer. In addition, since the upper structure is slidably supported on the upper surface of the support member, non-shear deformation is assured. Further, according to the present invention, when the high bearing load supporting member is compressed and deformed by receiving a high load, a force for shearing the upper and lower portions of the rubber layer acts, but the stress is applied to the rubber layer. Since the shear force of the adhesive surface is mechanically restrained by the reaction walls of the upper and lower fitting support members fitted vertically, the upper and lower portions of the rubber layer and the adhesive surface of the rubber layer are not sheared and destroyed. In addition, stress concentration on a part of the outer peripheral edge portion of the bonding interface of the rubber layer is reduced. Further, by forming an annular concave portion on the outer peripheral surface of the rubber layer by R processing or the like, concentration of stress on the outer peripheral edge of the rubber layer and the like is further alleviated. As a result, the outer surface of the rubber layer as a whole becomes substantially the same surface, and thus the peeling action is less exerted on the adhesive surfaces with the upper and lower fitting support members. And can absorb vibration. Further, since at least one or more reinforcing steel plates are embedded in the rubber layer, even when a high bearing pressure is applied, the internal stress of the rubber layer is widely distributed, and excessive local distortion of the rubber layer can be suppressed. it can. In the present invention, the steel plate or the reinforcing steel plate in contact with the rubber layer or the upper fitting support member and the lower fitting support member are roughened at the bonding interface with the rubber layer to enlarge the bonding surface and shear the rubber layer. Since the resistance is increased, the integral bonding strength is improved, and the shear resistance and the peel resistance against a high bearing pressure are increased.

[0010]

1 and 2 show a first embodiment of the present invention.
1 shows a bearing device 30 according to an embodiment;
In the lower support member 2 attached to the upper part of the lower structure 1, a positioning locking recess 3 is provided substantially at the center of the upper surface of the base plate 32. The lower part of the cylindrical member 4a is fixed by welding or the like to form a shear restraint wall 4, and the shear restraint wall 4 indirectly controls the relative lateral movement of the lower steel plate 9 and the upper steel plate 10 in the elastic bearing member 5. Or indirectly restrains the shear deformation due to the relative lateral displacement of the upper and lower ends of the elastic body (layer) 6 in the elastic bearing body 5 such as rubber. Upper surface of lower steel plate 9 and upper steel plate 10 in elastic bearing 5
An uneven adhesive surface 40 formed by an annular corrugated roll or knurling is formed on the entire circular surface on the lower surface of the steel sheet. Due to the shape of the bonding surface 40, the elastic layer 6 is more likely to be separated from the flat bonding surface by the shear force applied to the bonding surface between the elastic layer 6 and the steel plates 9 and 10 than the flat bonding surface. It can be more effectively blocked. The planar shape of the inner space portion of the shear restraint wall 4 is set to be substantially the same as or similar to the planar shape of the outer side of the upper support member 12 described later, and is manufactured in a rectangular or circular shape. . A positioning spacer 8 such as a steel ring fitted to the steel short cylindrical body 4a is mounted on the upper surface of the lower support member 2 at the lower portion inside the shear restraint wall 4 by welding or the like. The locking stopper 11a (1) is fixed and fitted and fixed to the concave portion of the lower steel plate 9 of the elastic bearing member 5 made of rubber or the like in the positioning locking concave portion 3.
The locking stopper 11 whose lower part is fitted and locked in 1) and which is fitted and fixed in the concave portion of the upper steel plate 10 in the elastic bearing member 5.
The upper portion of b (11) is fitted and locked in the concave portion 12a on the lower surface side of the upper support member 12 for supporting a structure.

A sliding support member 13 such as an ethylene tetrafluoride plate or a tetrafluoroethylene layer is fixed on the upper surface of the upper support member 12 with an adhesive or the like. A slide bearing member 13 such as a steel plate is fixed with screws or the like. Further, on the outer peripheral surface of the steel short cylindrical shear restraint wall 4 and the upper surface of the lower support member 2, reinforcing steel vertical ribs 14 are arranged at equal angular intervals and fixed by welding. The outer side surface of the upper support member 12 is disposed on the inner upper side of the cylindrical shear restraint wall 4 so as to be close to or in contact with the upper support member 12. Twelve sheet thicknesses are set so as to be located at the middle part (in the case of the drawing, almost at the center part of the sheet thickness). The lower support member 2 is inserted through the through hole 18 and is fixed by a bolt 15 such as an anchor bolt embedded in the lower structure 1 made of concrete or the like and a nut 16 screwed thereto.

A Teflon layer 39 is provided on the inner peripheral surface of the steel short cylindrical shear restraint wall 4 to smoothly move the upper support member 12 up and down. It is preferable to provide a Teflon layer also on the outer peripheral surface of the upper support member 12. The sliding surface between the inner surface of the steel short cylindrical shear restraint wall 4 and the outer peripheral surface of the upper support member 12 is preferably a slip surface having a low coefficient of friction. Further, if such a non-metallic Teflon layer 39 is provided, the upper support can be bent by bending of the upper structure without providing a gap between the inner peripheral surface of the shear restraint wall 4 and the outer peripheral surface of the upper support member 12. The member 12 is slightly tilted (rotated)
Even so, it can be supported while absorbing this.

The thickness of the upper support member 12 is such that the upper surface of the steel short cylindrical shear restraint wall 4 is substantially at the center of the plate thickness of the upper support member 12 in a state where the load of the upper structure is supported. Should be set at the level of As shown in FIG. 1, as shown in FIG. 1, the peripheral portion of the upper support member 12 is formed into a round portion in consideration of the rotation due to the bending of the upper structure (spar) 22, that is, an arc-shaped outer surface portion R. It is possible to smoothly follow the rotation due to the bending.

In the case of the above embodiment, the elastic bearing 5 is indirectly locked to the lower structure 1 via the lower support member 2 and indirectly horizontal to the steel short cylindrical shear restraint wall 4. The elastic body (layer) 6 in the elastic support 5 is locked so as not to be deformed by shearing, and the upper structure 22 is connected to the elastic support 5 via the upper support member 12 by being locked immovably in the direction. It is supported. A sliding support member 67 such as an ethylene tetrafluoride plate or an ethylene tetrafluoride layer or a stainless steel plate is fixed to the lower surface of the sole plate 38 on the upper structure 22 side. In the case of this embodiment, a bearing load support member 31 is constituted by the elastic support member 5 and the upper support member 12.

FIGS. 5 and 6 and FIG. 7 show a bearing device 30 according to a second embodiment and a third embodiment of the present invention, in which a high bearing load supporting member 31 is provided. The load supporting member 31 is supported by the lower supporting member 2 having a base plate 32 in a laterally moving and shear deformation manner, and is installed on the upper surface of the load supporting member 31 as a forced sliding type for simply supporting the upper structure. That is, the high bearing load support member 31 is installed on the upper surface of the base plate 32 installed on the lower structure, and a plane rising from the base plate 32 is arranged inside the circular or rectangular frame-shaped shear restraint wall 4 and is positioned beside it. Movement is restricted.

The high bearing load supporting member 31 is a single layer,
In addition, an annular concave portion 33 having a substantially semicircular shape is formed on the outer peripheral surface of the elastic layer 6 such as a thin rubber by R processing or the like.
A hard plate 34 such as a reinforcing steel plate is embedded in the elastic layer 6. An upper fitting support member 35 and a lower fitting support member 36 having a cup-shaped cross section having annular reaction force walls 35a and 36a are fitted on the upper and lower portions of the elastic layer 6, respectively.
Face plates 35b, 36 of the upper and lower fitting support members 35, 36
The contact portion between the inner surface of the elastic layer 6 and the upper and lower surfaces of the elastic layer 6 is an adhesive surface 37.
And the upper and lower portions of the elastic layer 6 are reaction walls 35a,
36a is fitted inside (a pot portion). An uneven corrugated roll or knurling process is applied to the entire circular surface of the lower surface of the upper fitting support member 35 and the upper surface of the lower fitting support member 36 of the high bearing load support member 31 and the front and back surfaces of the hard plate 34. The surface 40 is formed, so that the bonding interface between the upper fitting support member 35, the lower fitting support member 36, and the hard plate 34 with the elastic layer 6 is an uneven bonding surface 40 formed by annular corrugation or knurling. As a result, the peeling due to the shear force applied to the bonding surface between the elastic layer 6 and the steel plates 9 and 10 when the elastic layer 6 is compressed and deformed can be more effectively prevented as compared with the flat bonding surface. In the second embodiment shown in FIG. 5, a through hole is provided in the center of a hard plate 34 made of a reinforcing steel plate, and the upper and lower rubber layers of the hard plate 34 are integrated.

In the above-mentioned high bearing load supporting member 31,
From above, for example, 200 kg / cm ² of an arrow P (shown in FIG. 8)
When working with high loads such as 250 kg / cm ² to not, the elastic layer 6, the shear force of the arrow P ₁ direction acts,
This shear force is applied to the elastic layer 6 and the upper and lower fitting support members 35 and 36.
Acts as a peeling force on the adhesive surface 37 of the elastic layer 6 with the face plates 35b, 36b, but the reaction force walls 35a, 36a mechanically restrain the shearing force acting on the adhesive surface 37 of the elastic layer 6, and It is configured not to apply a shear force to the upper and lower portions and to alleviate concentration of stress on a part of the elastic layer. In addition, the upper fitting support member 35, the lower fitting support member 36, and the hard plate 34 Since the adhesive interface with the elastic layer 6 is an irregular adhesive surface 40 formed by an annular corrugation or knurling, the structure is such that even a thin elastic layer 6 can sufficiently withstand a high bearing pressure.

Further, in addition to the reaction walls 35a and 36a of the upper and lower fitting support members 35 and 36, the presence of the annular recess 33 formed by the R processing of the elastic layer 6 allows the elastic layer 6 to have a high vertical supporting pressure. Since the annular concave portion 33 is eliminated, or is compressed and deformed so as to slightly expand outward so as not to substantially affect the bearing action of the elastic layer 6, stress is concentrated on a part of the rubber layer. Can be reduced, and the elastic layer 6
Bonding surface 3 between the upper and lower parts and upper and lower fitting support members 35 and 36
The force acting to peel off 7 is very small as compared with the case where there is no annular concave portion 33. Therefore, the support member 31 is structured to smoothly cope with a high bearing pressure.

In the second and third embodiments, FIG.
The problem of the bearing load supporting member 1 having the structure shown as a comparative example shown in FIG. That is, in the bearing load supporting member 68 having the structure shown as a comparative example shown in FIG. 30, when the load indicated by the arrow P is applied from above, the plurality of elastic layers 6 via the reinforcing steel plate 7 are compressed and deformed. , together with the periphery of the elastic layer 6 bulges a R-shaped bulging portion 62, this is the upper and lower portions of the elastic layer 6 extends laterally worked arrow P ₁ direction stress, therefore, the elastic layer 6 And the upper and lower support plates 63,
Since a shearing force acts on the adhesive surface 65 with the adhesive layer 64 and acts to separate the adhesive surface, the bearing member 66 composed of the single elastic layer 6 having the above structure has an advantage that its thickness is small, in the case of a flat adhesive interface is Bearing stress is a limit of about 120 kg / cm ^2, for example, although Bearing stresses can not be Bearing a high load of 200 Kg / cm ² to 250 Kg / cm ² , As described above, the second
The invention in each of the third and third embodiments does not have such a problem.

More specifically, as shown in FIGS. 5 and 7, in the bearing device 30 having the high bearing load supporting member 31 as one of the main elements, the upper / lower fitting support member 35 of the high bearing load supporting member 31 is used. , 36 are adjacent to the shear restraint wall 4, and the shear restraint is higher than the height H ₁ of the upper surface 35 c of the upper fitting support member 35 fitted on the elastic layer 6 of the high bearing load support member 31. The height H of the top surface 4b of the wall 4 is provided at a lower position.

Therefore, the sole plate 38 attached to the lower surface of the upper structure is slid on the upper surface 35c of the upper fitting support member 35 of the high bearing load supporting member 31 located higher than the top surface 4b of the shear restraint wall 4. It can be freely and elastically supported.

In addition, as described above, the upper fitting support member 3
Since the lower part of 5 is lower than the top surface 4 b of the shear restraint wall 4, the elastic layer 6 of the high bearing load support member 31 and the upper fitting support member 35 are restrained by the shear restraint wall 4 from being subjected to shear deformation. Supported. Further, since the sole plate 38 attached to the upper structure is slidably supported on the upper surface 35c of the upper fitting support member 35 of the high bearing load supporting member 31, as described above, the high bearing load supporting member is provided. The elastic layer 31 is not sheared and deformed, and is a so-called forced slide type support. And in the high bearing load support member 31,
The adhesive interface between the hard plate 34 such as a reinforcing steel plate and the elastic layer 6 and the adhesive interface between the upper and lower fitting support members 35 and 36 and the elastic layer 6 are formed on the entire inner lower surface of the upper fitting support member 35 and the lower fitting support member. An uneven adhesive surface 40 is formed by forming an uneven portion by annular corrugation or knurling on the entire inner upper surface of the hard disk 36 and the entire front and back surfaces of the hard plate 34 such as a reinforcing steel plate. By making the uneven adhesive surface 40, the peeling by the shear force applied to the elastic layer 6 and the reinforcing steel plate 40 when the elastic layer 6 is compressed and deformed is more effective than the flat adhesive surface. Can be stopped.

Further, in order to smoothly move down the upper fitting support member 35 when the supporting member 31 bears a high load, the inner peripheral surface of the shear restraint wall 4 and the upper fitting member 35 are connected. It is preferable to provide a Teflon layer 39 on the sliding surface. It is also preferable to provide a Teflon layer 35d on the upper surface 35c of the upper fitting support member 35 that slidably supports the sole plate 38 attached to the upper structure.

FIG. 9 is a sectional view showing a high bearing load supporting member 31a according to a fourth embodiment of the present invention. In this load supporting member 31a, the adhesive interface between the hard plate 34 such as a reinforced steel plate and the elastic layer 6 is formed on the entire front and back surfaces of the hard plate 34 such as a reinforced steel plate in the same manner as in the third embodiment. By forming an uneven portion by such as, the uneven adhesive surface 40 is formed. By making the uneven adhesive surface 40, the peeling by the shear force applied to the elastic layer 6 and the reinforcing steel plate 40 when the elastic layer 6 is compressed and deformed is more effective than the flat adhesive surface. Can be stopped.

FIG. 10 is a sectional view showing a high bearing load supporting member 31b according to a fifth embodiment of the present invention. In the load supporting member 31b, the bonding surface between the upper and lower fitting supporting members 35 and 36 and the elastic layer 6 is formed into an uneven bonding surface 40 by annular corrugation or knurling, as in the third embodiment.
It has been. By forming the uneven adhesive surface 40, the upper and lower portions of the elastic layer 6 when the elastic layer 6 is compressed and deformed, and the upper and lower fitting support members 35 and 36 as compared with the flat adhesive surface.
Peeling due to the shearing force applied to the adhesive surface with the adhesive can be more effectively prevented.

FIG. 11 is a sectional view of a bearing device 30 using a specially adapted high bearing load supporting member 31c according to a sixth embodiment of the present invention. In this support member 31c, an elastic layer sandwiched between upper and lower fitting support members 35 and 36 has a laminated structure, and each has an annular concave portion 33 formed by R processing.
And a lower elastic layer 6b having an upper elastic layer 6a and a lower elastic layer 6b.
b, an intermediate support member 41 is provided, and a reaction wall 42 protruding in the vertical direction is provided at an end edge of the intermediate support member 41. In a pot portion formed by the reaction wall 42, Lower part of upper laminated elastic layer 6a and lower laminated elastic layer 6
b. In the present embodiment, the uneven support portion 40 is formed by forming an uneven portion by an annular corrugation or knurling on the entire inner surface and the inner lower surface of the intermediate support member 41 in the present embodiment. Other configurations of the bearing device 30 are the same as those of the bearing device 30 shown in FIG. 5 or FIG.

The high bearing load supporting member 31c shown in FIG. 11 is used as a specially adapted load supporting member, for example, when there is a space in the vertical direction and when the upper structure is supported by a soft compression spring. it can.

FIG. 12 shows a high bearing load supporting member 31d according to a seventh embodiment of the present invention. In the high bearing load supporting member 31d, a hard plate 34 such as a thick reinforcing steel plate is buried inside the elastic layer 6, and upper and lower fittings having reaction walls 35a, 36a on the upper and lower sides of the elastic layer 6 at the outer periphery. Attachment support members 35 and 36 are mounted. Further, the upper engagement support member 35 has a fitting recess 4 of a low friction sliding plate 43 made of a Teflon plate.
A rubber coating layer having a thin surface covering the surfaces of the upper and lower fitting support members 35 and 36 including the fitting concave portion 44 and the surface exposed to the outside of the elastic layer 6 located therebetween. 45.

In the high bearing load supporting member 31d according to the seventh embodiment, since the upper and lower fitting supporting members 35 and 36 made of steel are completely covered with the rubber coating layer 45, deterioration due to rust or the like is prevented. The durability is improved. The low-friction sliding plate 43 made of a Teflon plate is fitted into the fitting concave portion 44 of the upper fitting support member 35 and is adhered by an adhesive, so that the integration of the two members is ensured. Become.

Further, as shown in the figure, the portions of the upper and lower fitting support members 35, 36 projecting laterally from the elastic layer 6, that is, the reaction force walls 35a, 36a do not support the load from above. Low friction sliding plate 43 receiving a load from above
Is fitted and fixed in the fitting concave portion 44 substantially overlapping the elastic layer 6 and is not provided in the reaction force walls 35a and 36a. Therefore, the low friction sliding plate 43 made of a Teflon plate is provided. It is economical because materials can be kept to a minimum. Other configurations are the same as those of the high bearing load support member 31 shown in the second embodiment. Also,
The high bearing load support members 31, 31a, 31b, 31
The planar shapes of c and 31d may be either circular or rectangular.

FIG. 13 and FIG. 14 show a high bearing load supporting member 31 of an increased bonding interface type in which the bonding area between rubber and steel plate is increased. FIG. 15 (a) shows a bearing device 30 using the high bearing load supporting member 31. When the high bearing load supporting member 31 is circular,
A large number of annular grooves 71 are formed concentrically on the steel upper and lower plates, and in the case of a rectangular shape, the above-described concentric annular grooves 71 or lattice-like grooves or a lattice-like groove as described above. By forming a groove made of an appropriate combination, it is formed so as to improve the integral bonding strength between the elastic layer such as rubber and the steel face plate, and is configured to improve the shear resistance and the peel resistance. Have been. In this embodiment, as in the case of the first embodiment, the entire surface of the lower steel plate 9 and the lower surface of the upper steel plate 10 in the elastic bearing 5 is provided with an uneven adhesive surface 40 formed by an annular corrugated roll or knurling. May be formed.

FIG. 15A shows an eighth embodiment of the present invention using the high bearing load supporting member 31 shown in FIGS.
1 shows an elastic bearing device according to an embodiment. In this bearing device 30, a high bearing load supporting member 31 is laterally moved and sheared and restrained by a lower supporting member 2 provided with a base plate 32, and is simply slidably mounted on an upper surface of the load supporting member 31. It is installed as a forced slide type that supports the structure. That is, the high bearing load support member 31 is installed on the upper surface of the base plate 32 installed on the lower structure, and the plane rising from the base plate 32 is arranged inside the circular or rectangular frame-shaped shear restraint wall 4 and the Lateral movement is restricted.

As a modification of the above embodiment, FIG.
As shown in (b), the upper steel plate 10 is laterally extended, that is, a steel plate 10 with an extended flange made of a thick steel plate serving also as the upper support member 12 is formed. The lower steel plate 9 of the elastic body 5 is fitted and locked. In such a configuration, since the steel plate 10 is a thick steel plate, a relatively large vertical sliding distance of the steel plate 10 with the overhang flange can be allowed.

FIGS. 16 and 17 are explanatory views showing an example of forming a shear deformation restraining wall which can be used in the present invention. In both cases of the lower support member 2 and the lower steel plate 9, FIGS. That is, the steel short tubular body 4a is disposed on the upper surface of the lower support member 2 or the lower steel plate 9, and the base end of the steel short tubular body 4a is welded or the like. The shear restraint wall 4 is formed on the lower support member 2 or the lower steel plate 9 to be fixed or integrally connected. In the case of this form, it is a form that is closed in a plane, and 360 in a horizontal direction such as a horizontal direction.
° A constant strength can be exhibited in all directions. In addition, in FIG. 16 thru | or FIG.
4 is appropriately provided.

FIGS. 18 and 19 show the same as above.
It is explanatory drawing which shows the other example at the time of forming the shear deformation constraining wall which can be formed and used in either of the lower support member 2 or the lower steel plate 9, and shows the lower support member 2 or the lower steel plate 9. On the upper surface, a plurality (four in the case shown) of flat circular arc-shaped steel bearing wall units 4c are arranged at equal angular intervals.
A shear restraint wall 4 is formed and fixed on the circular locus. As described above, the shear restraint wall 4 may be formed on the lower support member 2 or may be formed on the lower steel plate 9.

FIG. 20 shows a usage example according to the form shown in FIG. 7 as a typical usage form of the bearing device of each of the embodiments according to the present invention. That is, FIG. 20 is a longitudinal sectional view showing a bridge support device 30 installed on the upper surface of the substructure 1 such as an abutment or a pier. In the support device 30, the high bearing load support member 31 and the buffer means 46 are provided. Are arranged separately. By the support member 31, a steel girder 4 made of H-shaped steel as an upper structure 22 constituting a bridge such as a road bridge.
7 are supported in parallel, and a floor slab 48 is supported by the steel girder 47. In addition, the above-mentioned buffering means 46 buffers the omnidirectional swing of the horizontal force, the upward lift, and the rotational force of the upper structure. Further, the left and right steel girders 47 are connected and reinforced by connecting beams (not shown).

In the buffer means 46, a mounting plate 51 fixed with bolts 50 or the like is provided below the connecting beam 49.
An upper support frame 53 comprising a plurality of hanging support members 52 integrally provided with the mounting plate 51 and spaced apart in a substantially comb-tooth shape is provided. A lower support frame comprising an upper portion of the lower structure 1 and a plurality of upright support members 55 provided integrally with a mounting plate 54 fixed to the upper portion with an anchor bolt 61 or the like and spaced apart in a substantially comb-tooth shape. 56 are provided. And the hanging support member 5
2 and the upright support member 55 are engaged with each other from above and below, and a plurality of constant gaps are formed in the horizontal direction, and a certain gap is formed in the vertical direction. Further, a block-shaped rubber damper 57 is provided as a specific example of the elastic body so as to fill the gap in the horizontal direction. One side of the rubber damper 57 is fixed to the hanging support member 52, and the other side is the upright supporting member. 55.

The above-described separation type bridge bearing device 30 operates as follows. The load of an upper structure such as a bridge such as a road bridge supported by a steel girder 47 is the high bearing load supporting member 31.
The elastic layer 6 has no load on the buffer means 46. When a large earthquake occurs, a downward force acting on the steel girder 47 can be dispersed and compressed by the elastic layer 6 being compressed and deformed in the shear restraint wall 4 via the deformation allowable space 58. With respect to the upward lift acting on the steel girder 47, the rubber damper 5
7, the steel girder 47 and the lower structure 1 are connected to each other via the buffer means 46 having the upper frame 53 and the lower frame 56. Controlled smoothly.

The sole plate 38 attached to the lower surface of the lower flange 69 of the steel girder 47 with respect to the horizontal force acting on the steel girder 47 due to the earthquake, that is, the force in the direction of the bridge axis and the direction perpendicular to the horizontal axis. Is in pressure contact with the upper surface Teflon layer 35d of the upper fitting support member 35 of the support member 31 via the thin steel plate 59 such as a stainless steel plate, and the press-contact support portion 60 is slidably joined to each other. The horizontal force is attenuated by the sliding friction. In addition to this, at the same time, the rubber damper 57 of the buffer means 46 is attenuated by shear deformation in the bridge axis direction, and is compressed and deformed in the direction perpendicular to the bridge axis. Attenuated.

Further, against the rotational force acting on the steel girder 47 due to the earthquake, the compression deformation of the elastic layer 6 of the high bearing load supporting member 31 and the shear deformation of the rubber damper 57a of the buffering means 46 interact effectively. Can be attenuated.

In the case of the above embodiment, a description has been given of a bearing device in which the lower support member 2 and the elastic bearing member 5 are combined and combined, but an embodiment in which the size can be relatively reduced is described next. Will be described with reference to the drawings.

FIGS. 21 and 22 show a ninth embodiment of the present invention, in which the lower rectangular plate 9 of the elastic bearing 5 is wider and thicker than the circular upper plate 10. On the upper surface of the lower steel plate 9, female screw holes 20 are provided at substantially equal angular intervals on a circular locus. A steel short cylindrical body 4b with a flange, in which a steel flange 17 is integrally connected to the outer peripheral side of the upper surface of the lower steel plate 9.
A through hole 18 is provided on the flange 17 at equal angular intervals, and a fixing bolt 19 inserted through the through hole 18 is screwed and fixed to a female screw hole 20 provided in the lower steel plate 9. Thus, a shear restraint wall 4 is formed. In this case, the upper steel plate 10 and the lower steel plate 9 are integrally fixed to the elastic body 6 so as to be inseparable by integral molding, baking, or an adhesive. The upper part of the cylindrical shear restraint wall 4 is disposed so as to approach or contact the outer surface of the upper steel plate 10. The Teflon layer 39b may be provided on the inner peripheral surface of the shear restraint wall 4, and the outer peripheral surface of the upper steel plate 10 may be an arc-shaped outer surface portion R as in the first embodiment. In this embodiment, a circular surface serving as an adhesive surface with the rubber layer excluding the peripheral portion of the upper surface of the lower steel plate 9 and the lower surface of the upper steel plate 10 in the elastic bearing body 5 has an uneven surface formed by an annular corrugated roll or knurling. An adhesive surface 40 is formed, and thus each steel plate 9,
The adhesive interface between the elastic layer 10 and the elastic layer 6 is formed as an uneven adhesive surface 40 formed by an annular corrugation or a knurling process. 6 and the steel plates 9 and 10 can be more effectively prevented from peeling due to shearing force applied to the bonding surface.

In the case of this embodiment, a slide support member 13 such as an ethylene tetrafluoride plate or an ethylene tetrafluoride layer or a stainless steel plate is provided on the upper surface of the upper steel plate 10, and the elastic support body 5 is provided on the lower structure 1. The lower structure steel plate 9 is directly fixed to the lower structure 1 by the anchor bolts 15 and the nuts 16 screwed thereto, and the upper structure steel plate 9 is connected to the upper structure steel plate 10 without the upper support member 12 interposed therebetween.
However, other configurations are the same as those in the above-described embodiment. In the case of this embodiment, the upper steel plate and the lower steel plate are integrally formed so as to be inseparable by the elastic body 6 fixed to them, so that the transfer of the bearing device does not become complicated. It can be transported relatively easily. When the cylindrical shear restraint wall 4 is manufactured, two half-cylindrical bearing wall units may be combined and configured.
Or you may comprise so that three or more division | segmentation cylindrical support wall units may be combined.

FIGS. 23 and 24 show a tenth embodiment of the present invention.
In the embodiment, a columnar shear restraint wall 4 is integrally provided at a central upper portion of a rectangular lower steel plate 9, and an upper steel plate 10 having a circular hole 68 at a central portion is provided on the shear restraint wall 4. It is fitted. On the upper surface of the lower steel plate 9, an annular elastic layer made of rubber and a lower portion of an annular elastic body 6 formed by alternately stacking annular steel plates so as to be embedded therein are integrally fixed by integral molding or baking. And
The inner peripheral surface 24 of the circular hole 68 at the center of the upper steel plate 10 is disposed so as to be in contact with or close to the outer peripheral surface of the cylindrical shear restraint wall 4, and the upper surface level of the shear restraint wall 4 is The upper steel plate 10 is disposed so as to be located at an intermediate portion of the plate thickness. In the case of this embodiment, in order to improve weather resistance such as rust prevention, a rubber coating 72 is provided on a side outer peripheral surface of the elastic bearing member 5 and is connected to the rubber coating 72 so as to be integrally connected thereto. A rubber coating 73 is provided on the upper surface of the device 10. In this embodiment, an annular adhesive surface formed by an annular corrugated roll or knurling process is provided on the upper surface of the lower steel plate 9 and the lower surface of the annular upper steel plate 10 to be bonded to the rubber layer. Thus, the adhesive interface between each of the steel plates 9 and 10 and the elastic layer 6 is formed as an uneven adhesive surface 40 formed by an annular corrugation or a knurling process. It is possible to more effectively prevent peeling due to shear force applied to the bonding surface between the elastic layer 6 and each of the steel plates 9 and 10 when the layer 6 is compressed and deformed.

An annular gap 26 is interposed between the inner peripheral surface 24 of the elastic member 6 and the outer peripheral surface of the columnar shear restraint wall 4 to deform the elastic member 6 when it receives a compressive force. An allowable space is formed.

In the case of the above embodiment, the lower steel plate 9 of the elastic bearing 5 is directly fixed to the lower structure 1 by the anchor bolt 15 and the nut 16 screwed to the lower structure. Are directly supported by the upper steel plate 10 without the intervention of the upper support member 2.

FIG. 25 and FIG. 26 show an eleventh embodiment of the present invention, in which an upper protruding portion 27 having a plane contour similar to that of a circular or rectangular upper steel plate 10 and an upper protruding portion 27 are shown. Step 29 in stepped lower steel plate 9 with bearing flange 28 connected to bearing projection 27
A shear restraint wall 4 made of a steel tubular body is removably fitted and mounted on the upper protruding portion on the upper surface of the low-level support flange 28, and the upper protruding portion 2 of the step portion 29 is provided.
7, the shear restraint wall 4 is restrained so as not to be able to move in the horizontal direction, and the upper surface level of the cylindrical shear restraint wall 4 is an intermediate portion of the thickness of the upper steel plate 10 (in the illustrated case, substantially the center portion). Section). In this embodiment, the upper protrusion 27, the step 29, and the bearing flange 2
And a lower steel plate 9 provided with the above. When this embodiment is used in an inverted arrangement as described later, the shear restraint wall 4 may be fixed to the lower steel plate 9 by an appropriate fixing means such as welding. Other configurations are the same as those in the embodiment shown in FIG.

FIG. 27 shows an example of use of the bearing device shown in FIG. 21 as a typical use mode of the bearing device of the embodiment after FIG. 21 according to the present invention. Since the structure other than the elastic bearing device is the same, the same portions are denoted by the same reference numerals and description thereof will be omitted.

FIGS. 28 and 29 show a twelfth embodiment of the present invention.
And a thirteenth embodiment. In these embodiments, it is noted that any of the devices shown in the first to eleventh embodiments can be used in an inverted arrangement. FIG. 28 shows a state in which the form shown in FIG.
The lower support member 2 is formed by fixing a slip bearing member 13 such as a tetrafluoroethylene plate on the upper surface of a steel plate or the like, and the shear restraint wall 4 is formed downward on the upper support member 12 and supported by the shear restraint wall 4. The pressure load support member 31 is arranged, and a slide support layer 35 d such as a tetrafluoroethylene plate or layer or a stainless steel plate is provided on the lower surface of the lower fitting support member 36.

In the case of FIG. 29, FIG.
1 is a configuration in which the configuration shown in FIG.
The lower surface of the lower steel plate 9 is provided with a shear-restraining wall 4, and the lower surface of the lower steel plate 9 is provided with a slide bearing layer 35d similar to that described above. Are slidably mounted on a sliding bearing member 13 such as

In the case of the embodiment shown in FIGS. 28 and 29, the upper end of the anchor bolt 15 embedded and fixed in the lower structure 1 is welded to the lower surface of the lower support member 2 as shown by a two-dot chain line. Fixed. Also, the embodiment in which the upper structure 22 is a concrete structure (girder) 22 is illustrated. That is, the upper support member 1
2 is fixed to the upper structure 22 by an anchor bolt 69 and a nut 70 screwed thereto. When the upper structure 22 is made of steel, the upper support member 12 and the lower support member 2 are appropriately attached by bolting or welding, as in the first to eleventh embodiments. If the upper structure 22 is a concrete structure, it may be mounted with anchor bolts or the like.

The embodiment shown in FIGS. 1 to 20 has a composite structure of the elastic bearing member 5, the upper support member 12, and the lower support member 2, whereas the embodiment shown in FIGS. Can be said to be a built-in type or an integrated type structure in which a portion that functions similarly to the lower support member or the upper support member (when inverted) is integrally or fixedly formed on the elastic support 5.

In the embodiment of the present invention, when the rubber layer is thin, a hard plate may not be embedded, but a hard plate such as a reinforcing steel plate embedded in the rubber layer (or elastic layer) 6 may be used. For example, at least one or more steel sheets having a thickness of 1 mm or more may be embedded, and a plurality of steel sheets may be embedded as needed. When used for high bearing pressure, the thickness of a hard plate such as a reinforcing steel plate embedded in the rubber layer (or elastic layer) 6 is appropriately selected, for example, from 1 to 100 mm, and a plurality of hard plates are embedded as needed. What should I do? If an irregular adhesive surface 40 is formed on both the front and back surfaces of a hard plate such as a reinforced steel plate by annular corrugation or knurling, the integrated area is further increased by the increase in the adhesive area, and the peeling resistance and shear deformation are increased. Resistance can be increased. If the bonding interface between the lower steel plate 9, the upper steel plate 10, the intermediate support member 41, the upper fitting support member, and the rubber layer of the lower fitting support member in each of the above embodiments is roughened or unevenly engaged, a flat surface is obtained. Compared to the bonding interface, the increased bonding area due to the uneven engagement or the roughened surface further increases the integral bonding, so that the peeling resistance and the shear deformation resistance can be increased, so that it can be used even at a high bearing stress. can do.

When the slide type elastic bearing device according to the present invention is used, it may be used together with a lateral movement (movement in the direction perpendicular to the bridge axis) damping means 46 as shown in FIGS. Alternatively, instead of the buffer means 46, a known seismic isolation device configured by alternately stacking a rubber layer and a hard plate such as a steel plate in the vertical direction is disposed between the upper structure 22 and the lower structure 1. You may do so.

[0055]

As described above, according to the bearing device according to the present invention, since the elastic body does not always function as a shear bearing, a relatively large shear deformation caused by the lateral displacement of the elastic body is repeated. Since the fatigue of the elastic body does not occur, the durability of the elastic body can be enhanced, and the upper structure can always be slidably supported while the load bearing function and the rotating bearing function of the elastic bearing device are functioning. Even if seismic force acts during construction as well as after the building of the object, the superstructure can be supported without exerting excessive lateral supporting force on the elastic bearing device. In addition, since it is a type that does not cause shear deformation, the elastic body can be made smaller than conventional bearing devices that cause shear deformation, so that the elastic bearing device can be downsized, and the structure is simple, so production is also easy. It is easy, and the transportation and installation work of the device can be performed relatively easily. In addition, since the bonding interface with the elastic layer of each steel plate at both upper and lower ends of the elastic bearing body is roughened, the bonding surface is enlarged and the shear resistance of the rubber layer is increased, so that a relatively high bearing stress Can be dealt with with a simple configuration. In addition, since the elastic layer of the load-bearing member is indirectly restrained from lateral movement and shear deformation by a shear restraint wall through a hard member such as steel, an unreasonable external force acts directly on the elastic layer. Without this, the shear deformation of the elastic layer can be reliably restrained. In addition, since the high bearing load supporting member is restrained from lateral movement and shear deformation by the shear restraint wall rising from the base plate, no shear deformation occurs in the elastic layer, and the upper structure is provided by the support member. By being slidably supported on the upper surface, the above-mentioned non-shear deformability is further ensured. Furthermore, according to the present invention, when the high bearing load supporting member is compressed and deformed under a high load, a shear force acts on the upper and lower portions of the elastic layer, but the stress is fitted on the upper and lower sides of the elastic layer. Since the reaction walls of the upper and lower fitting support members are mechanically restrained from shearing the adhesive surface, the elastic layer does not peel and shear break, and stress concentration on a part of the elastic layer is reduced The upper and lower fitting support members attached to the upper and lower portions of the rubber layer of the high bearing load supporting member have roughened adhesive interfaces with the rubber layer, or reinforcements embedded in the rubber layer. The bonding interface with the rubber layer of a hard plate such as a steel plate is roughened to enlarge the bonding surface and increase the shear resistance of the rubber layer by simple means. Improve the strength,
For a high bearing pressure, the shear resistance and the peel resistance can be increased. Further, since an annular concave portion is formed on the outer peripheral surface of the elastic layer by R processing or the like, stress concentration on a part of the elastic layer can be reduced as compared with a case where the annular concave portion is not provided. When the elastic layer is compressed and deformed by receiving a high load from above, it can be smoothly compressed and deformed so that the outer peripheral surface of the elastic layer as a whole is substantially the same, so that the elastic layer peels off from the adhesive surface with the upper and lower fitting support members. There is an excellent effect that it has little effect and can absorb vibrations of the order of magnitude, and that the elastic layer can be made thin with a single layer and the structure is simple.

[Brief description of the drawings]

FIG. 1 is a sectional view of a bearing device using a bearing load supporting member according to a first embodiment of the present invention.

FIG. 2 is a plan view of a bearing device using the bearing load supporting member shown in FIG.

FIG. 3 is a sectional view of the bearing load supporting member shown in FIG. 1;

FIG. 4 is a plan view of the bearing load supporting member shown in FIG. 3;

FIG. 5 is a sectional view of a bearing device using a high bearing load supporting member according to a second embodiment of the present invention.

6 is a plan view of a bearing device using the high bearing load supporting member shown in FIG.

FIG. 7 is a cross-sectional view of a bearing device using a high bearing load supporting member according to a third embodiment.

8 is a cross-sectional view of the high bearing load supporting member shown in FIG.

FIG. 9 is a cross-sectional view of a high bearing load supporting member according to a fourth embodiment.

FIG. 10 is a cross-sectional view of a high bearing load supporting member according to a fifth embodiment.

FIG. 11 is an explanatory cross-sectional plan view of a bearing device using a high bearing load supporting member according to a sixth embodiment of the present invention.

FIG. 12 is a sectional view of a high bearing load supporting member according to a seventh embodiment.

FIG. 13 is a cross-sectional view of a high bearing load supporting member according to an eighth embodiment.

14 is a plan view of the bearing load supporting member shown in FIG.

15A is a sectional view of a bearing device using the bearing load supporting member shown in FIG. 13, and FIG. 15B is a sectional view of a bearing device using a modified example of the load supporting member.

FIG. 16 is a plan view of a lower support member or a lower steel plate having a reaction force bearing wall that can be used in the present invention.

17 is a sectional view of the lower steel plate with the lower support member or the reaction force bearing wall shown in FIG. 16;

FIG. 18 is a plan view of another example of a lower steel plate with a lower support member or a reaction force bearing wall that can be used in the present invention.

19 is a sectional view of the lower steel plate with the lower support member or the reaction force bearing wall shown in FIG. 18;

FIG. 20 is a sectional view showing an installation state of a bridge support device according to a ninth embodiment.

FIG. 21 is a sectional view of a bearing device using a bearing load supporting member according to a tenth embodiment.

FIG. 22 is a plan view of the bearing device shown in FIG. 21.

FIG. 23 is a sectional view of a bearing device using a bearing load supporting member according to an eleventh embodiment.

24 is a plan view of the bearing device shown in FIG.

FIG. 25 is a sectional view of a bearing device using a bearing load supporting member according to a twelfth embodiment.

FIG. 26 is a plan view of the bearing device shown in FIG. 26;

FIG. 27 is a cross-sectional view showing an installation state of the bridge support device according to the embodiment shown in FIG. 21;

FIG. 28 is a cross-sectional view showing a state in which a bearing device using a bearing load supporting member according to a thirteenth embodiment is inverted and used.

FIG. 29 is a cross-sectional view showing a state in which a bearing device using a bearing load supporting member according to a fourteenth embodiment is inverted and used.

FIG. 30 is a cross-sectional view showing a shear deformation of a load supporting member including a laminated elastic layer as a comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower structure 2 Lower support member 3 Positioning and locking recess 4 Steel short cylindrical shear restraint wall 5 Elastic bearing 6 Elastic body 7 Reinforced steel plate 8 Spacer 9 Lower steel plate 10 Upper steel plate 11 Locking stopper 12 Upper support member DESCRIPTION OF SYMBOLS 13 Sliding bearing member 14 Reinforcement steel vertical rib 15 Bolt (anchor bolt) 16 Nut 17 Flange 18 Through hole 19 Fixing bolt 20 Female screw hole 21 Flange 22 Upper structure 23 Through hole 24 Inner peripheral surface 25 Outer peripheral surface 26 Annular surface Gap 27 Upper projecting portion 28 Bearing flange 29 Step 30 Bearing device 31 High bearing load support member 32 Base plate 33 Annular concave portion 34 Hard plate 35 Upper fitting support member 35a Annular reaction wall 36 Lower fitting support member 36a Annular reaction force Wall 37 Adhesive surface 38 Sole plate 39b Teflon layer 40 Irregular adhesive surface 42 Reaction force Wall 43 Low friction sliding plate 44 Fitting recess 45 Rubber coating layer 46 Buffer means 47 Steel girder 48 Floor slab 49 Connecting cross girder 50 Bolt 51 Mounting plate 52 Hanging support member 53 Upper support frame 54 Mounting plate 55 Upright support member 56 Lower support frame 57 Rubber damper 58 Deformation allowable space 59 Thin steel plate 60 Press-contact support portion 61 Anchor bolt 62 R-shaped bulging portion 63 Upper support plate 64 Lower support plate 65 Bonding surface 66 Support member 67 Sliding support member 68 Circular hole 69 Lower flange

Claims (8)

[Claims] An elastic bearing device for a structure disposed between an upper structure and a lower structure, wherein one of the steel plates in the elastic bearing body having a steel plate above and below is replaced with the upper structure or the upper structure. It is immovably locked directly or indirectly to any one of the lower structures, and the other steel plate of the elastic bearing is vertically and horizontally movable on the side of the locked structure. The surface of the elastic steel plate is directly or indirectly locked so that it cannot move in the direction, and the outer surface of the other steel plate is always a surface that slidably supports the upper structure or the lower structure in an unlocked state. A sliding type elastic bearing device for a structure, characterized in that the bonding interface between each steel plate and the elastic layer is roughened to enlarge the bonding surface and increase the shear resistance of the rubber layer. 2. An elastic bearing device for a structure disposed between an upper structure and a lower structure, wherein the lower steel plate in the elastic bearing body integrally including the upper steel plate and the lower steel plate via an elastic layer includes: The other upper steel plate is fixed to the upper surface of the lower support member fixed to the lower structure so as not to be laterally movable, and the other upper steel plate is movable toward the lower support member in the vertical direction relative to the lower support member. The upper structure is always slidably supported in the lateral direction via a slide bearing having a sliding surface provided on an upper part of the upper steel plate. A slide-type elastic bearing device for a structure, characterized in that the adhesive interface with the elastic layer is roughened to enlarge the adhesive surface and increase the shear resistance of the rubber layer. 3. A lateral bearing and a shear deformation of a high bearing load supporting member placed on a base plate are restrained by a shear restraint wall rising from a base plate installed on the lower structure, and a rubber of the high bearing load supporting member is provided. An upper surface of an upper fitting support member mounted on the upper portion of the layer is provided so as to protrude from the top of the shear restraint wall, and the upper plate of the upper fitting support member slidably supports a sole plate attached to the upper structure. The bonding surface between the rubber layer and the upper fitting support member and the lower fitting support member mounted on the upper and lower portions of the rubber layer of the high bearing load supporting member is roughened, so that the bonding surface is enlarged and the rubber layer is enlarged. A sliding type elastic bearing device for a structure, characterized in that the shear resistance of the structure is increased. 4. An annular concave portion is formed on the outer peripheral surface of the rubber layer, and an upper fitting support member and a lower fitting support member mounted on the upper and lower portions of the rubber layer are provided with a high bearing stress of the rubber layer. A reaction wall is provided to restrain the shearing force in the horizontal direction, and the bonding interface with the rubber layer of a hard plate such as a reinforcing steel plate embedded in the rubber layer is roughened to enlarge the bonding surface and shear the rubber layer. A high bearing load supporting member characterized by increased resistance. 5. An annular concave portion formed by R processing on an outer peripheral surface of the rubber layer, and an upper fitting support member and a lower fitting support member mounted on the upper and lower portions of the rubber layer are provided with a high support of the rubber layer. A reaction wall for restraining a horizontal shear force due to the pressure stress degree is provided, the thickness of the reinforcing steel sheet embedded in the rubber layer is increased, and the bonding interface with the rubber layer is roughened to form a bonding surface. A high bearing load supporting member characterized in that the expansion of the thickness and the shear resistance of the rubber layer are increased. 6. An annular recessed portion formed by rounding to reduce stress concentration on the outer peripheral surface of the rubber layer, and the internal stress of the rubber layer due to a high bearing stress is distributed widely.
In order to suppress excessive local distortion, at least one or more hard plates such as reinforced steel plates having rough surfaces on both front and back surfaces are embedded in the rubber layer, and an upper fitting support member mounted on upper and lower portions of the rubber layer A high-bearing load supporting member, wherein a reaction force wall for restraining a shear force mechanically acting on the bonding surface is provided on the lower fitting support member and the lower fitting support member. 7. An elastic bearing device for a structure disposed between an upper structure and a lower structure, wherein the lower steel plate in the elastic body integrally including the upper steel plate and the lower steel plate via an elastic layer is provided. The other upper steel plate is fixed to the object, and is fixed to the lower steel plate so as to be vertically movable relative to the lower steel plate and immovable in the lateral direction by a shear restraint wall provided on the lower steel plate. The upper structure is always slidably supported in the lateral direction via a sliding bearing having a sliding surface provided on the upper part of the steel plate, and the rough interface between the upper steel plate and the lower steel plate with the rubber layer is provided. A sliding type elastic bearing device for a structure, characterized in that the bonding surface is enlarged and the shear resistance of the rubber layer is increased. 8. The other upper steel plate is movable in the vertical direction relative to the lower steel plate and is not movable in the lateral direction by a shear restraint wall formed of a columnar member provided at a central portion of the lower steel plate. The slide type elastic bearing device for a structure according to claim 7, wherein the device is locked.