JP2006077503A - Horizontal load elastically bearing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a horizontal load elastically bearing device which is incorporated in a functional discrete bearing, wherein the device can exert a predetermined damper function at the time of an earthquake or under the condition of strong wind, even if a vertical load is applied to the device. <P>SOLUTION: According to the structure of the horizontal load elastically bearing device, a sole plate 5 is arranged on a laminated rubber bearing 2 via upper shoes 3, and a base plate 15 is arranged below the laminated rubber bearing 2 via lower shoes 13. Each upper shoe 3 has its frame body 3a supported on an outer periphery of a substrate 3c via an elastic layer 3b. The frame body 3a is mounted on the sole plate 5, and the substrate 3c is mounted on the laminated rubber bearing 2. By virtue of this structure when a vertical load is applied to the horizontal load elastically bearing device 1, the vertical load is absorbed by shear deformation of the elastic layer 3b of the upper shoe 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a horizontal load elastic support device incorporated in a function separation type bearing.

In recent years, the support installed between the superstructure (bridges, buildings, etc.) and the substructure (abutments, piers, foundations, etc.) has a function to support vertical loads and horizontal loads from the viewpoint of reducing construction costs. There is a tendency to use a function-separated type support that separates the function of elastic support (for example, see Patent Document 1).
JP 2003-138518 A (column [0002] column)

  However, in this function-separated type support, when a vertical load is applied to a horizontal load elastic support device that is designed to support only a horizontal load, the horizontal load elastic support device performs a predetermined damper function during an earthquake or strong wind. There was a risk that it could not be demonstrated.

  An object of this invention is to provide the horizontal load elastic support apparatus which can eliminate such an inconvenience.

First, the invention according to claim 1 is characterized in that in a horizontal load elastic support device installed between an upper structure and a lower structure, a load absorbing member that absorbs a vertical load from the upper structure is incorporated. And
In the invention according to claim 2, the load absorbing member is configured such that a frame body is elastically supported on an outer periphery of a substrate through an elastic layer, and the substrate and the frame body are Is attached to the upper structure side, and the other is attached to the lower structure side.
The invention according to claim 3 is characterized in that an uplift stopper is provided to prevent the superstructure from floating.

  According to the present invention, even when a vertical load is applied to the horizontal load elastic support device, the vertical load can be absorbed by the load absorbing member. Therefore, it becomes possible to cause the horizontal load elastic support device to exhibit a predetermined damper function during an earthquake or a strong wind.

  Further, when an uplift stopper is provided, when the upper structure such as a bridge or a building receives an uplift force due to an earthquake or a strong wind, the uplift stopper can prevent the sole plate and thus the upper structure from being lifted. As a result, it is possible to prevent the superstructure from falling off and improve safety against earthquakes.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
As shown in FIG. 1, the horizontal load elastic support device 1 is installed between a concrete bridge 10 and a concrete abutment 20, and rubber layers 2 a and steel plates 2 b are alternately laminated. It has a laminated rubber bearing 2 bonded by vulcanization.

  As shown in FIG. 1, a square plate-like upper collar 3 is attached to the upper side of the laminated rubber support 2 and fixed with a plurality of (for example, 16) hexagon socket head bolts 4. Above the upper collar 3, a square plate-like sole plate 5 is attached via a square frame-like spacer 8 with a predetermined gap C1, and a plurality of (for example, 16) hexagon bolts 6 are used. It is fixed. A plurality of (for example, four) anchor bolts 7 for fixing the sole plate 5 to the bridge 10 are screwed upward on the upper surface of the sole plate 5. Further, a cylindrical shear key 9 is fitted into the upper steel plate 2b and the sole plate 5 of the laminated rubber support 2 so as to pass through the upper flange 3, and on the upper side of the shear key 9, the sole plate 5 is fitted. Is formed with a gap C2 equal to the gap C1.

  By the way, the upper arm 3 has a function of absorbing the vertical load from the bridge 10. That is, as shown in FIG. 2, the upper collar 3 has a square plate-shaped steel substrate 3c, and an elastic layer 3b made of rubber (synthetic rubber or natural rubber) is provided on the outer periphery of the substrate 3c. The steel frame body 3a having a square frame shape is supported elastically so as to be movable up and down. A plurality of (for example, 16) bolt holes 3e through which the hexagon socket bolts 4 are inserted are formed in the peripheral portion of the substrate 3c. A key hole 3f for inserting the shear key 9 is formed at the center of the substrate 3c. Furthermore, a plurality of (for example, 16) bolt holes 3d for inserting the hexagon bolts 6 are formed in the frame 3a. The upper arm 3 is fixed to the steel plate 2b above the laminated rubber support 2 with the hexagon socket head bolt 4 and the frame 3a is fixed to the sole plate 5 with the hexagon head bolt 6 via the spacer 8. It is in the state.

  Further, as shown in FIG. 1, a square plate-shaped lower rod 13 is attached to the lower side of the laminated rubber support 2 and fixed by a plurality of (for example, 16) hexagon socket head bolts 14. . A square plate-like base plate 15 is attached to the lower side of the lower rod 13 and fixed with a plurality of (for example, 16) hexagon bolts 16. A plurality of (for example, four) anchor bolts 17 for fixing the base plate 15 to the abutment 20 are screwed downward on the lower surface of the base plate 15. Further, a cylindrical shear key 19 is fitted to the lower steel plate 2b and the lower rod 13 of the laminated rubber support 2.

  Since the horizontal load elastic support device 1 has the above-described configuration, when a horizontal load acts on the horizontal load elastic support device 1 due to expansion / contraction of the bridge 10 due to temperature change, earthquake, strong wind, etc., the horizontal load is applied to the shear key 9. , 19 to the laminated rubber bearing 2. And the laminated rubber support 2 relieves a horizontal load by the shear deformation. Therefore, the horizontal load elastic support device 1 exhibits a predetermined damper function.

  Further, when a vertical load F1 is applied to the horizontal load elastic support device 1, the frame 3a of the upper collar 3 sinks as shown in FIG. At this time, the elastic layer 3b is interposed between the frame 3a of the upper collar 3 and the substrate 3c, and the elastic layer 3b absorbs the vertical load F1 due to the shear deformation, so that the substrate 3c sinks. Does not occur. Here, since the predetermined gaps C1 and C2 are formed between the substrate 3c of the upper collar 3 and the shear key 9 and the sole plate 5, the elastic layer 3b can be sheared without any trouble. Therefore, the horizontal load elastic support device 1 can exhibit a predetermined damper function during an earthquake or a strong wind.

<Second Embodiment>
As shown in FIG. 4, a plurality (two in FIG. 4) of steel uplift stoppers 11 are attached to the lower side of the frame 3a of the upper rod 3, and the frame 3a of the upper rod 3 is When it is lifted, the uplift stopper 11 may be engaged with the substrate 3c of the upper collar 3 to prevent the sole plate 5 from floating. In this horizontal load elastic support device 1, in addition to the effects of the first embodiment described above, when the bridge 10 receives an uplift force due to an earthquake, strong wind, or the like, the uplift stopper 11 causes the sole plate 5, and thus the bridge, to extend. 10 lifts can be prevented. As a result, it is possible to prevent the bridge 10 from falling off and improve safety against earthquakes.

<Third Embodiment>
In the first and second embodiments described above (see FIGS. 1 and 4), the case where the function of absorbing the vertical load from the bridge 10 is incorporated in the upper arm 3 has been described. As shown in FIG. A function of absorbing the vertical load from the bridge 10 may be incorporated in the lower arm 13. Hereinafter, a case where the function of absorbing the vertical load from the bridge 10 is incorporated in the lower arm 13 will be described.

  That is, as shown in FIG. 5, the horizontal load elastic support device 1 is installed between a concrete bridge 10 and a concrete abutment 20, and the rubber layers 2a and the steel plates 2b are alternately arranged. The laminated rubber bearing 2 is laminated and vulcanized and bonded.

  As shown in FIG. 5, a square plate-shaped upper collar 3 is attached to the upper side of the laminated rubber support 2 and fixed by a plurality of (for example, 16) hexagon socket head bolts 4. A square plate-like sole plate 5 is attached above the upper collar 3 and fixed by a plurality of (for example, 16) hexagon bolts 6. A plurality of (for example, four) anchor bolts 7 for fixing the sole plate 5 to the bridge 10 are screwed upward on the upper surface of the sole plate 5. Further, a cylindrical shear key 9 is fitted to the upper steel plate 2 b and the upper collar 3 of the laminated rubber support 2.

  Further, as shown in FIG. 5, a square plate-like lower rod 13 is attached to the lower side of the laminated rubber support 2 and fixed with a plurality of (for example, 16) hexagon socket head bolts 14. . On the lower side of the lower rod 13, a square plate-like base plate 15 is attached via a square frame spacer 18 with a predetermined gap C1, and a plurality of (for example, 16) hexagon bolts 16 are used. It is fixed. A plurality of (for example, four) anchor bolts 17 for fixing the base plate 15 to the abutment 20 are screwed downward on the lower surface of the base plate 15. Further, a cylindrical shear key 19 is fitted into the lower steel plate 2b and the base plate 15 of the laminated rubber support 2 so as to pass through the lower rod 13, and on the upper side of the shear key 19, the laminated rubber support 2 is fitted. A gap C2 equal to the gap C1 is formed between the lower steel plate 2b.

  By the way, the lower arm 13 has a function of absorbing a vertical load from the bridge 10. That is, as shown in FIG. 5, the lower arm 13 has a square plate-shaped steel substrate 13c, and an elastic layer 13b made of rubber (synthetic rubber or natural rubber) is formed on the outer periphery of the substrate 13c. The steel frame 13a having a square frame shape is supported elastically so as to be movable up and down. A plurality of (for example, 16) bolt holes 13e through which the hexagon socket head bolts 14 are inserted are formed in the peripheral portion of the substrate 3c. Further, a key hole 13f for inserting the shear key 9 is formed at the center of the substrate 13c. Furthermore, a plurality of (for example, 16) bolt holes 13d for inserting the hexagon bolts 16 are formed in the frame body 13a. The lower arm 13 has a base plate 13c fixed to the steel plate 2b below the laminated rubber support 2 with hexagon socket bolts 14 and a frame body 13a fixed to the base plate 15 with hexagon bolts 16 via spacers 18. It is in a state.

  In addition, a plurality (two in FIG. 5) of steel uplift stoppers 11 are provided on the upper side of the frame 13a of the lower rod 13, and the substrate of the lower rod 13 when the substrate 3c of the lower rod 13 is lifted. It is attached so that it may engage with 13c and the floating of the soleplate 5 may be suppressed.

  Since the horizontal load elastic support device 1 has the above-described configuration, the same effects as those of the second embodiment are achieved. That is, when a horizontal load is applied to the horizontal load elastic support device 1 due to expansion / contraction of the bridge 10 accompanying the temperature change, an earthquake, a strong wind, or the like, the horizontal load is transmitted to the laminated rubber support 2 via the shear keys 9 and 19. And the laminated rubber support 2 relieves a horizontal load by the shear deformation. Therefore, the horizontal load elastic support device 1 exhibits a predetermined damper function.

  Further, when a vertical load is applied to the horizontal load elastic support device 1, the substrate 13c of the lower collar 13 sinks. At this time, the elastic layer 13b is interposed between the substrate 13c and the frame 13a of the lower collar 13, and the elastic layer 13b absorbs the vertical load due to the shear deformation, so that the frame 13a sinks. Does not occur. Here, a predetermined gap C1 is formed between the base plate 15 and the lower rod 13, and a predetermined gap C2 is formed between the shear key 19 and the steel plate 2b below the laminated rubber support 2. Therefore, the shear deformation of the elastic layer 13b is performed without any trouble. Therefore, the horizontal load elastic support device 1 can exhibit a predetermined damper function during an earthquake or a strong wind.

  Further, when the bridge 10 receives an uplift force due to an earthquake or a strong wind, the uplift stopper 11 can prevent the board 13c of the lower roof 13 and thus the bridge 10 from being lifted. As a result, it is possible to prevent the bridge 10 from falling off and improve safety against earthquakes.

<Fourth Embodiment>
In the first and second embodiments described above (see FIGS. 1 and 4), the case where the upper collar 3 is fixed to the laminated rubber support 2 with the hexagon socket head cap bolt 4 has been described. As shown in FIG. Alternatively, a composite laminated rubber support 23 in which the laminated rubber support 2 and the upper collar 3 are integrated can be employed. Hereinafter, the horizontal load elastic support device 1 employing the composite laminated rubber bearing 23 will be described.

  That is, as shown in FIG. 6, the horizontal load elastic support device 1 is installed between a concrete bridge 10 and a concrete abutment 20 and absorbs a vertical load from the bridge 10. The composite laminated rubber bearing 23 provided with. That is, the composite laminated rubber support 23 has rubber layers 23a and steel plates 23b alternately laminated and vulcanized and bonded, and a square plate-like steel substrate 23c is integrally attached to the rubber layer 23a. A steel frame 23e having a square frame shape is elastically supported on the outer periphery of 23c via an elastic layer 23d made of rubber (synthetic rubber or natural rubber).

  On the upper side of the composite laminated rubber support 23, as shown in FIG. 6, a square plate-like sole plate 5 is provided with a predetermined gap C1 through a square frame-like spacer 8, and a plurality of pieces are provided. It is fixed to the frame body 23e with (for example, 16) hexagon bolts 6. A plurality (two in FIG. 6) of steel uplift stoppers 11 are provided below the frame body 23e of the composite laminated rubber support 23, and the frame body 23e of the composite laminated rubber support 23 is lifted. Are attached to the board 23c to prevent the sole plate 5 from floating. A plurality of (for example, four) anchor bolts 7 for fixing the sole plate 5 to the bridge 10 are screwed upward on the upper surface of the sole plate 5. Further, a cylindrical shear key 9 is fitted to the base plate 23c and the sole plate 5 of the composite laminated rubber support 23, and the upper side of the shear key 9 is equal to the gap C1 with the sole plate 5. A gap C2 is formed.

  Further, as shown in FIG. 6, a square plate-like lower rod 13 is attached to the lower side of the composite laminated rubber bearing 23 and fixed by a plurality of (for example, 16) hexagon socket head bolts 14. Yes. A square plate-like base plate 15 is attached to the lower side of the lower rod 13 and fixed with a plurality of (for example, 16) hexagon bolts 16. A plurality of (for example, four) anchor bolts 17 for fixing the base plate 15 to the abutment 20 are screwed downward on the lower surface of the base plate 15. Further, a cylindrical shear key 19 is fitted to the lower steel plate 23 b and the lower rod 13 of the composite laminated rubber bearing 23.

  Since the horizontal load elastic support device 1 has the above-described configuration, when a horizontal load acts on the horizontal load elastic support device 1 due to expansion / contraction of the bridge 10 due to temperature change, earthquake, strong wind, etc., the horizontal load is applied to the shear key 9. , 19 is transmitted to the composite laminated rubber bearing 23. The composite laminated rubber bearing 23 relaxes the horizontal load by the shear deformation. Therefore, the horizontal load elastic support device 1 exhibits a predetermined damper function.

  Further, when a vertical load is applied to the horizontal load elastic supporting device 1, the frame body 23e of the composite laminated rubber bearing 23 sinks. At this time, an elastic layer 23d is interposed between the frame 23e of the composite laminated rubber support 23 and the substrate 23c, and the elastic layer 23d absorbs a vertical load due to its shear deformation. The situation where the substrate 23c sinks does not occur. Here, since the predetermined gaps C1 and C2 are formed between the substrate 23c and the shear key 9 of the composite laminated rubber support 23 and the sole plate 5, the elastic layer 23d can be sheared without any trouble. Therefore, the horizontal load elastic support device 1 can exhibit a predetermined damper function during an earthquake or a strong wind.

  Further, when the bridge 10 receives an uplift force due to an earthquake or a strong wind, the uplift stopper 11 can prevent the sole plate 5 and thus the bridge 10 from being lifted. As a result, it is possible to prevent the bridge 10 from falling off and improve safety against earthquakes.

<Fifth Embodiment>
Further, in the above-described third embodiment (see FIG. 5), the case where the lower collar 13 is fixed to the laminated rubber support 2 with the hexagon socket head cap bolt 14 has been described. However, as shown in FIG. It is also possible to employ a composite laminated rubber support 25 in which 2 and the lower rod 13 are integrated. Hereinafter, the horizontal load elastic support device 1 employing the composite laminated rubber support 25 will be described.

  That is, this horizontal load elastic support device 1 is installed between a concrete bridge 10 and a concrete abutment 20 as shown in FIG. 7, and has a function of absorbing a vertical load from the bridge 10. The composite laminated rubber bearing 25 provided with is provided. That is, the composite laminated rubber support 25 has rubber layers 25a and steel plates 25b alternately laminated and vulcanized and bonded, and a square plate-like steel substrate 25c is integrally attached to the rubber layer 25a. A steel frame body 25e having a square frame shape is supported on the outer periphery of 25c in an elastically movable manner through an elastic layer 25d made of rubber (synthetic rubber or natural rubber).

  As shown in FIG. 7, a square plate-like upper collar 3 is attached to the upper side of the composite laminated rubber support 25 and fixed with a plurality of (for example, 16) hexagon socket head bolts 4. A square plate-like sole plate 5 is attached above the upper collar 3 and fixed by a plurality of (for example, 16) hexagon bolts 6. A plurality of (for example, four) anchor bolts 7 for fixing the sole plate 5 to the bridge 10 are screwed upward on the upper surface of the sole plate 5. Further, a cylindrical shear key 9 is fitted to the upper steel plate 25 b and the upper collar 3 of the composite laminated rubber bearing 25.

  Further, as shown in FIG. 7, a square plate-like base plate 15 is attached below the composite laminated rubber support 25 via a square frame-like spacer 18 with a predetermined gap C1. It is fixed to the frame body 25e by 16 (for example, 16) hexagon bolts 16. A plurality (two in FIG. 7) of steel uplift stoppers 11 are disposed on the upper side of the frame body 25e of the composite laminated rubber support 25, and are combined when the substrate 25c of the composite laminated rubber support 25 is lifted. It is attached so as to prevent the sole plate 5 from floating by engaging with the substrate 25c of the laminated rubber support 25. A plurality of (for example, four) anchor bolts 17 for fixing the base plate 15 to the abutment 20 are screwed downward on the lower surface of the base plate 15. Further, a cylindrical shear key 19 is fitted to the base plate 15 and the base plate 15 of the composite laminated rubber support 25, and between the base of the shear key 19 and the base 25c of the composite laminated rubber support 25, A gap C2 equal to the gap C1 is formed.

  Since the horizontal load elastic support device 1 has the above-described configuration, when a horizontal load acts on the horizontal load elastic support device 1 due to expansion / contraction of the bridge 10 due to temperature change, earthquake, strong wind, etc., the horizontal load is applied to the shear key 9. , 19 to the composite laminated rubber bearing 25. The composite laminated rubber support 25 relaxes the horizontal load due to the shear deformation. Therefore, the horizontal load elastic support device 1 exhibits a predetermined damper function.

  Further, when a vertical load is applied to the horizontal load elastic support device 1, the frame body 25e of the composite laminated rubber support 25 sinks. At this time, an elastic layer 25d is interposed between the frame body 25e of the composite laminated rubber support 25 and the substrate 25c, and the elastic layer 25d absorbs a vertical load due to its shear deformation. The situation where the substrate 25c sinks does not occur. Here, since the predetermined gaps C1 and C2 are formed between the substrate 25c and the shear key 9 of the composite laminated rubber support 25 and the sole plate 5, the elastic layer 25d can be sheared without any trouble. Therefore, the horizontal load elastic support device 1 can exhibit a predetermined damper function during an earthquake or a strong wind.

  Further, when the bridge 10 receives an uplift force due to an earthquake or a strong wind, the uplift stopper 11 can prevent the sole plate 5 and thus the bridge 10 from being lifted. As a result, it is possible to prevent the bridge 10 from falling off and improve safety against earthquakes.

<Other embodiments>
In the first and second embodiments described above, the upper collar 3 in which the substrate 3c is fixed to the steel plate 2b above the laminated rubber support 2 and the frame 3a is fixed to the sole plate 5 has been described. However, while fixing the board | substrate 3c to the soleplate 5, the frame 3a can also be fixed to the steel plate 2b of the upper part of the laminated rubber support 2. FIG.

  In the above-described third embodiment, the base plate 13c is fixed to the steel plate 2b below the laminated rubber support 2 and the frame 13a is fixed to the base plate 15. However, the base plate 13c has been described. Can be fixed to the base plate 15, and the frame body 13 a can be fixed to the steel plate 2 b below the laminated rubber support 2.

  In each of the above-described embodiments, the upper collar 3 or the composite laminated rubber bearings 23, 25 in which the square plate-like substrates 3c, 13c, 23c, 25c are combined with the square frame-like frames 3a, 13a, 23e, 25e. However, the shapes of the substrates 3c, 13c, 23c, and 25c and the frames 3a, 13a, 23e, and 25e are not limited to this. For example, the shapes of the substrates 3c, 13c, 23c, and 25c can be made circular, and the shapes of the frames 3a, 13a, 23e, and 25e can be made polygonal.

  In each of the above-described embodiments, the case where the laminated rubber bearing 2 or the composite laminated rubber bearings 23 and 25 are employed has been described. However, a laminated rubber bearing with a lead plug or a high damping rubber bearing can be used instead.

  In each of the above-described embodiments, the case where the upper structure is the concrete bridge 10 and the lower structure is the concrete abutment 20 has been described. However, the present invention can also be applied when the upper structure is a concrete bridge and the lower structure is a concrete pier. Further, the present invention can also be applied when the upper structure is a steel bridge and the lower structure is a concrete abutment or pier. Furthermore, the present invention can also be applied when the upper structure is a building and the lower structure is a foundation.

It is a longitudinal section showing a 1st embodiment of a horizontal load elastic support device concerning the present invention. It is sectional drawing by the AA line of the horizontal load elastic support apparatus shown in FIG. It is a longitudinal cross-sectional view which shows a state when a vertical load acts on the horizontal load elastic support apparatus shown in FIG. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the horizontal load elastic support apparatus which concerns on this invention. It is a longitudinal cross-sectional view which shows 3rd Embodiment of the horizontal load elastic support apparatus which concerns on this invention. It is a longitudinal cross-sectional view which shows 4th Embodiment of the horizontal load elastic support apparatus which concerns on this invention. It is a longitudinal cross-sectional view which shows 5th Embodiment of the horizontal load elastic support apparatus which concerns on this invention.

Explanation of symbols

1 …… Horizontal load elastic support device 2 …… Laminated rubber bearing 3 …… Upper arm (load absorbing member)
3a: Frame 3b: Elastic layer 3c: Substrate 5: Sole plate 9, 19 ... Shear key 10 ... Bridge (superstructure)
11 …… Uplift stopper 13 …… Lower rod (load absorbing member)
13a …… Frame body 13b …… Elastic layer 13c …… Substrate 15 …… Base plate 20 …… Abutment (lower structure)
23, 25 ... Composite laminated rubber bearing (load absorbing member)
C1, C2 …… Gap F1 …… Vertical load

Claims (3)

In the horizontal load elastic support device installed between the superstructure and the substructure,
A horizontal load elastic support device, wherein a load absorbing member for absorbing a vertical load from the upper structure is incorporated. The load absorbing member is a frame body that is elastically supported on the outer periphery of the substrate via an elastic layer,
2. The horizontal load elastic support device according to claim 1, wherein one of the substrate and the frame is attached to the upper structure side, and the other is attached to the lower structure side.   The horizontal load elastic support device according to claim 1, further comprising an uplift stopper for preventing the upper structure from floating.

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