JP6718010B1 - Structural support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bearing for a structure capable of suppressing the height to a low level and having high seismic performance. SOLUTION: A lower shoe 11 fixed to a pier 1, an upper shoe 12 fixed to a bridge girder 2, and an upper shoe 12 are interposed between the lower shoe and the upper shoe to support an upper structure through a rubber layer. And an elastic support 13. The upper shoe 12 has a recess 12a into which the elastic support 13 is fitted upward from the lower surface. The elastic support is fitted in the recess of the upper shoe, with the lower part protruding from the lower surface of the upper shoe. There is. The lower surface of this elastic support is brought into contact with the flat upper surface of the lower shoe, and the elastic support is supported on the lower shoe. A sliding layer may be provided on the lower surface of the elastic support to make it a movable shoe. The shear key 14 for restraining the horizontal relative displacement between the upper structure and the upper shoe is provided with a plurality of upper shoe fixing bolts 16 for fixing the upper shoe to the upper structure outside the range where the concave portion of the upper shoe is provided. Are provided so as to surround each. [Selection diagram] Fig. 3

Description

TECHNICAL FIELD The present invention relates to a bearing for supporting an upper structure such as a bridge girder on a lower structure.

Bearings are widely used to support superstructures such as bridge girders on concrete abutments and piers. Various types of bearings have been proposed, but among them, as shown in Patent Document 1, there are a lower shoe and an upper shoe made of steel, and an elastic support body interposed therebetween. There is something.
This type of bearing transfers a vertical load acting from the upper structure to the lower structure via an elastic support. Then, the rotational displacement of the upper structure is absorbed by the deformation of the elastic support body, and it is possible to prevent a large local bearing stress from acting on the lower shoe, the upper shoe or the structure.

JP 2006-342494 A

However, the conventional bearing has the following problems to be solved.
Bearings may be limited in height. For example, when the bearing used for a bridge becomes old and deteriorates, it is necessary to replace it with a new one. At this time, the height of the road surface cannot be changed, and new bearings are limited to the same height as existing bearings. On the other hand, the seismic standards required for bearings are stricter than when the old bearings were installed, and it is necessary to have a higher level of seismic performance at the same height.
Even for new bridges, bearings with a small height may be required depending on the situation of the erection position.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a structural support that can suppress the height to a low level and that has high seismic performance.

In order to solve the above-mentioned problems, the invention according to claim 1 comprises: a lower shoe fixed to a lower structure; an upper shoe fixed to an upper structure; and a rubber layer, the lower shoe and the upper shoe. And an elastic support body interposed between the upper shoe and the upper support. The upper shoe has a recess into which the elastic support body is fitted from the lower surface upward, and the elastic support body is fitted in the recess. In the inserted state, the lower part protrudes from the lower surface of the upper shoe, the lower surface of the elastic support is brought into contact with the upper surface of the lower shoe, and the elastic support is supported on the lower shoe. A plurality of upper shoe fixing bolts for fixing the upper shoe to the upper structure are coupled to the outside of the range in which the recess is provided in a plan view of the upper shoe, and the horizontal direction of the upper shoe and the upper shoe. A shear key for restraining the relative displacement of the above is provided so as to surround each of the upper bolt fixing bolts .

In this structure support, since the elastic support is fitted in the recess provided in the upper shoe, the combined height of the upper shoe and the elastic support can be kept small. As a result, the height of the entire bearing can be suppressed, and it can be applied even when the height of the bearing is limited.
Further, since the recess into which the elastic support is fitted is opened downward, it is possible to prevent rainwater and dust from accumulating in the recess.

Further, in this structure support, horizontal force or shearing force acting between the upper shoe and the upper structure is resisted not only by the upper shoe fixing bolt but also by the shear key. Therefore, even when a large shearing force acts between the upper shoe and the upper structure such as during an earthquake, the upper shoe is firmly held by the upper structure and the gap between the upper shoe and the upper structure does not shift. Occurrence is suppressed.
If the shear key is to be provided between the upper shoe and the upper structure, the upper shoe needs to have a sufficient thickness around the shear key so as not to be deformed even when a large shear force is applied. In the structure support of the present invention, the upper shoe fixing bolt can be provided in a portion having a sufficient thickness around the recess, and the shear key can be provided around the bolt. Therefore, it is possible to reduce the thickness of the upper shoe at the portion where the elastic support is fitted, and to distribute the horizontal force to the plurality of shear keys provided around the upper surely and reliably.

The invention according to claim 2 is the support for a structure according to claim 1, wherein the shear key has a cylindrical cylindrical portion, and an enlarged diameter portion whose diameter is enlarged near a lower end of the cylindrical portion. Has,
The cylindrical portion is fitted from below into a vertical through hole provided in the upper shoe, the enlarged diameter portion is locked to the upper shoe, and the upper portion of the cylindrical portion is located above the through hole. And is fitted into a recess provided in the upper structure or a member fixed to the upper structure, the upper shoe fixing bolt is a member fixed to the upper structure or the upper structure. Is inserted into a hole provided in the shear key, and is screwed into a female screw on the inner peripheral surface of the central hole provided in the cylindrical portion of the shear key so that the upper shoe is sandwiched between the upper structure and the shear key. Shall be fastened to.

In this structure bearing, the shear key can be attached and the upper shoe can be fixed by twisting the upper shoe fixing bolt to the shear key, which enables efficient work.

The invention according to claim 3 is the structure support according to claim 2, wherein a space is provided below the shear key, and the height of the space is such that the cylindrical portion of the shear key has the upper structure. It is assumed that the height is larger than the height fitted into the concave portion provided in the object or the member fixed to the upper structure.

In this structure bearing, there is a space below the shear key fitted into the upper shoe from below, and the shear key is lowered to the space below the lower shoe by removing the upper shoe fixing bolt. Then, the shear key comes out from the recess provided in the upper structure or a member fixed to the upper structure. As a result, there is nothing that restrains the relative displacement in the horizontal direction between the upper shoe and the upper structure. Therefore, it is possible to pull out the upper shoe and the elastic support body in the horizontal direction only by slightly pushing the upper structure to remove the load on the upper shoe without pushing the upper structure greatly upward. This makes it possible to easily replace the upper shoe or the elastic support.

The invention according to claim 4 is the structure support according to claim 1, wherein the shear key has a lower part fitted into a recess provided in an upper surface of the upper shoe, and an upper part is the upper structure or the upper part. It is fitted into a recess provided in a member fixed to the upper structure, the upper shoe fixing bolt is inserted into a hole provided in the upper structure or a member fixed to the upper structure, It is assumed that the central hole provided in the shear key is penetrated and screwed into a bolt hole provided in the upper shoe.

In this structure support, a plurality of shear keys can be provided with a simple structure to disperse and transmit the horizontal force acting between the upper structure and the upper shoe.

The invention according to claim 5 is the support for a structure according to any one of claims 1 to 4, wherein a sliding layer is provided on a lower surface of the elastic support, and the upper shoe is on the lower shoe. It shall be possible to slide.

In this structure support, the elastic support and the upper shoe supported by this slide on the lower shoe and allow the upper structure to move in the horizontal direction due to factors such as temperature change without being restricted. Becomes

As described above, in the structure support of the present invention, the height can be suppressed to a low level, and the structure support having high seismic performance can be provided.

It is a front view and a top view of a structure support which is one embodiment of the present invention. It is a side view of the support for structures shown in FIG. It is sectional drawing of the bearing for structures shown in FIG. It is a partially expanded sectional view for demonstrating the detail and function of the shear key of the structure support shown in FIG. It is a front view and a top view of a structure support which is other embodiments of the present invention. It is sectional drawing of the bearing for structures which is other embodiment of this invention. It is sectional drawing which shows the structure of the shear key of the structure support which is other embodiment of this invention. It is the front view and top view which are shown for reference as another structure bearing using a part of composition of the present invention .

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view and a plan view of a structure support according to an embodiment of the present invention, and FIG. 2 is a side view. Further, FIG. 3 is a sectional view.
This structure support includes a lower shoe 11 fixed on an abutment or pier 1 which is a lower structure, an upper shoe 12 fixed on a bridge girder 2 which is an upper structure, a lower shoe 11 and an upper shoe 12. An elastic support 13 interposed between the two, a shear key 14 for restraining the horizontal relative displacement of the bridge girder 2 and the upper shoe 12, and a position of the upper shoe 12 fixed to the lower shoe 11. The side block 15 and the side block 15 are fixed so that the position of the bridge girder 2 is fixed and supported.

The lower shoe 11 is a plate-shaped member made of steel and is installed on a concrete abutment or pier 1. Four anchor bolts 3 are vertically embedded in the position of the abutment or pier 1 where the lower shoe 11 is installed, and the upper end portion is projected, and the lower shoe 11 is coupled to the upper end portion of the anchor bolt 3. It is fixed by that. The structure in which the lower shoe 11 is coupled to the upper end portion of the anchor bolt 3 may be such that the male screw formed at the upper end portion of the anchor bolt 3 is screwed into the screw hole formed in the lower shoe and coupled. Alternatively, the anchor bolt 3 may be coupled by a nut twisted to the upper end of the anchor bolt 3. In this embodiment, a long nut 4 having a laterally projecting head portion is inserted into a through hole formed in the lower shoe 11 and is screwed into a male screw at the upper end portion of the anchor bolt 3 to secure the projecting head portion. It is supposed to be locked and fixed to the upper surface of the lower shoe 11.

The upper shoe 12 is a thick plate-shaped member made of steel, and is fixed to the bridge girder 2 which is an upper structure by an upper shoe fixing bolt 16. In this embodiment, the bridge girder 2 is a steel plate girder, and the upper shoe 12 is fixed via a sole plate 5 that is fixed in contact with the bottom surface of the lower flange 2a.
The upper shoe 12 is provided with a recess 12a into which the elastic support 13 is fitted from the lower surface upward. As shown in FIG. 1B, the recess has a circular planar shape and is shallower than the height of the elastic support. In addition, a notch 12b for locking the side block 15 is formed in the upper part of the side edge of the bridge girder 1 in the axial direction. The notch 12b has a predetermined length corresponding to the size of the side block 15 in the axial direction of the bridge girder 1 and has a rectangular cross section having a predetermined depth in the vertical direction.

The upper shoe fixing bolts 16 for fixing the upper shoe 12 to the bridge girder 1 are provided at four corners of the upper shoe 12 and are holes formed in the lower flange 2a and the sole plate 5 from above the lower flange 2a of the bridge shoe 2. And is twisted to the shear key 14 locked to the upper shoe 12.

The shear key 14 has a cylindrical portion 14a and an enlarged diameter portion 14b that horizontally projects from the lower end of the cylindrical portion, and has a central hole on the central axis. A female screw is formed on the inner peripheral surface of the central hole so that the upper shoe fixing bolt 16 can be screwed together.
As shown in FIG. 3( b ), the upper shoe 12 has a through hole having a diameter that allows the cylindrical portion 14 a of the shear key to be inserted without a gap or with a slight gap, the lower flange 2 a and the sole plate. The hole formed in 5 and the central axis can be aligned with each other. Further, a recess having the same diameter as the through hole is formed in the sole plate 5 around the hole from the lower surface upward. The shear key 14 is inserted into the through hole provided in the upper shoe 12 from below and the upper portion thereof is projected into the recess formed in the sole plate 5. Then, the enlarged diameter portion 14b of the shear key is fitted into the inner diameter enlarged portion 12c of the through hole from the lower surface of the upper shoe 12, abuts around the through hole, and is locked so as not to come out upward. The upper bolt fixing bolt 16 inserted through the lower flange 2a of the bridge girder 2 and the hole of the sole plate 5 is screwed into the female screw of the central hole of the shear key 14 so that the lower part of the bridge girder is provided between the head and the shear key 14. The flange 2a, the sole plate 5 and the upper shoe 12 are sandwiched and fixed.
Although the cylindrical portion 14a of the shear key penetrates the upper shoe 12 and is projected into the concave portion of the sole plate 5 fixed to the bridge girder 1 which is an upper structure, it is provided on the bridge girder through the sole plate. It may be inserted into a recess provided in the bridge girder, or may be inserted into a recess provided in the bridge girder when the sole plate is not used.

The elastic support 13 is a member mainly made of rubber molded in a disc shape, and steel plates 13a and 13b are embedded near the upper surface and the lower surface as shown in FIG. 3(a). .. Further, a steel ring 13d is embedded in the rubber layer 13c between the upper steel plate 13a and the lower steel plate 13b to restrain excessive deformation of the rubber layer 13c.
The elastic support 13 has an outer diameter that substantially matches the inner diameter of the recess 12a formed in the upper shoe 12, is fitted into the recess of the upper shoe 12, and is not excessive even by the inner peripheral surface of the recess 12a. The deformation of is restricted. The lower end portion projects downward from the lower surface of the upper shoe 12, and the lower surface is supported by abutting the upper surface of the lower shoe 11. Therefore, the upper shoe 12 and the bridge girder 2 are supported on the lower shoe 11 via the elastic support 13.

The side blocks 15 are provided along both side surfaces of the upper shoe 12 in the axial direction of the bridge girder 1, and are fixed to the lower shoe 11 by block fixing bolts 17. The side surfaces of these side blocks 15 face the side surfaces of the upper shoe 12 and restrain the upper shoe 12 from moving in a direction perpendicular to the axis of the bridge girder 1. On the upper portions of these side blocks 15, there are provided rectangular upper protruding portions 15a protruding toward the upper shoe side from a surface facing the side surface of the upper shoe 12. The upper overhanging portion 15a is projected into the notch 12b provided in the upper shoe 12, and the three elevations and the bottom surface of the upper overhanging portion 15a are the inner surface of the notch 12b provided in the upper shoe 12 and They are facing each other. Therefore, it is possible to restrain the upper shoe 12 from moving in the axial direction of the bridge girder 2 and restrain the upper shoe 12 from floating upward.

In such a structure support, the bridge girder 2 is supported on the pier 1 via the lower shoe 11, the elastic support 13 and the upper shoe 12 to restrain the horizontal movement and upward lifting of the bridge girder 2. In addition, the bending angle on the bearing due to the flexure of the bridge girder 2 due to the load is allowed by the deformation of the elastic support 13, and the bridge girder 2, the upper shoe 12, the lower shoe 11 and the pier 1 are subjected to excessive stress. Suppress the occurrence of.
In this structure support, since the elastic support 13 is fitted in the recess of the upper shoe 12, the height of the support can be kept small. Therefore, when replacing the existing deteriorated bearing, it becomes a bearing having a large earthquake resistance performance that meets the strengthened earthquake resistance standard, and it can be installed without changing the position of the bridge girder 2.

The lower surface of the shear key 14 is opposed to the upper surface of the lower shoe 11 with a gap in a state where the shear key 14 is fitted into a through hole provided in the upper shoe 12 and tightened by the upper shoe fixing bolt 16. Has become. That is, as shown in FIG. 4( a ), a space 18 is provided between the lower surface of the shear key 14 and the upper surface of the lower shoe, and the height H 2 is such that the cylindrical portion 14 a of the shear key has the sole plate 5 The height is set to be larger than the height H1 fitted in the concave portion.

When the shear key 14 is mounted in this way, by removing the upper shoe fixing bolt 16, the shear key 14 descends into the space 18 between the upper shoe 11 and the upper surface of the lower shoe 11 as shown in FIG. 4B. .. Then, as the shear key 14 moves down the height H2 of the lower space 18, the cylindrical portion of the shear key 14 fitted into the sole plate 5 comes out of the recess. As a result, there is nothing to restrain the relative displacement in the horizontal direction between the upper shoe 12 and the sole plate 5 fixed to the upper structure. Therefore, when the block fixing bolt 17 is pulled out and the side block 15 is removed, the upper structure 12 and the elastic support member 13 are simply lifted up to remove the load on the upper structure 12 without significantly pushing the upper structure upward. And can be pulled out horizontally. As a result, the upper shoe 12 or the elastic support 13 can be replaced.

FIG. 5 is a front view and a plan view showing a structure support according to another embodiment of the present invention. This structure support, which supports the bridge girder 2 similarly to that shown in FIG. 1, is a so-called movable lumber that allows the bridge girder 2 to move in the axial direction.

In this structure support, a sliding layer 23a is formed on the bottom surface of the elastic support 23. The sliding layer 23a may be, for example, a fluororesin layer, and is capable of sliding on the lower shoe 11 under the load from the bridge girder 2.
Further, the notch 22b provided on the upper side surface of the upper shoe 22 is formed such that the dimension of the bridge girder 2 in the axial direction is larger than the dimension of the upper protruding portion 25a of the side block 25, and the notch 22b is provided. The upper shoe 12 is allowed to be displaced in the axial direction of the bridge girder within the range.
The other parts of this structural support can adopt the same structure as shown in FIG.

In this structure support, the height can be kept small as in the case shown in FIGS. 1 to 3, and it can be used as a movable trough that allows expansion and contraction due to temperature changes of the bridge girder.

In the above-described embodiment, the elastic support member is a disc-shaped rubber member having a steel plate and a steel ring embedded therein. However, other elastic support members can be used. For example, as shown in FIG. 6, a circular rubber plate 33a and a steel intermediate plate 33b may be used.
The elastic support 33 is obtained by stacking an intermediate plate 33b on the lower side of a circular rubber plate 33a, and the rubber plate 33a is fitted into a recess 32a provided in the upper shoe 32. The outer diameter of the intermediate plate 33b is slightly smaller than that of the rubber plate 33a, and a gap is formed between the intermediate plate 33b and the inner peripheral surface of the recess 32a provided in the upper shoe 32. Then, a steel ring 33c is fitted to the outer peripheral portion of the lower surface of the rubber plate 33a, and even when the rubber plate 33a is strongly compressed, the rubber is restrained from being deformed and pushed out into the gap. There is. As a result, the rubber plate 33a is in a state of being confined by the inner peripheral surface of the recess provided in the upper shoe 12, the intermediate plate 33b, and the steel ring 33c, and excessive deformation of the rubber plate and the accompanying destruction thereof are suppressed.

FIG. 7 is a sectional view showing a bearing for a structure which adopts another example of the shear key.
In this structure support, bolt holes 42a into which the upper shoe fixing bolts 46 are screwed are formed near the four corners of the upper shoe. The bolt hole 42a has a female screw formed on its inner peripheral surface. The upper shoe fixing bolt 46 is inserted into the holes provided in the lower flange 2a and the sole plate 5 of the bridge girder, and the tip of the bolt is screwed into the bolt hole 42a provided in the upper shoe to tighten the upper shoe 42 to the bridge girder 2. It is supposed to be fixed.
Around the position where the bolt hole 42a is provided on the upper surface of the upper shoe 42, a concave portion having a circular planar shape is formed so that the central axes coincide with each other. On the other hand, the sole plate 5 also has a circular recess whose center axis coincides with that of the bolt hole 42a and which has the same diameter as the recess provided on the upper surface of the upper shoe 42, and is formed upward from the lower surface. ing.

The shear key 44 is a cylindrical member made of metal, has a central hole on the central axis, and has an outer diameter provided in a recess provided on the upper surface of the upper shoe 42 and on the lower surface of the sole plate 5. It can be fitted into the recess. Then, there is no gap between the outer peripheral surface of the fitted shear key 44, the inner peripheral surface of the concave portion of the upper shoe 42 and the inner peripheral surface of the concave portion provided on the sole plate 5 so that there is almost no gap. It is dimensioned. The upper shoe fixing bolt 46 penetrates the central hole of the shear key 44 from the lower flange 2a of the bridge girder and the hole of the sole plate 5, and is screwed into the bolt hole 42a of the upper shoe 42.
The other structure of this structure support is the same as that shown in FIGS.

In the structure bearing having the shear key 44 as described above, a plurality of upper gears are applied against the horizontal force, that is, the shearing force, which acts between the upper plate 42 and the sole plate 5 firmly fixed to the bridge girder 2. A plurality of shear keys 44 provided around the fixing bolts 46 resist, and the upper shoe 42 is firmly fixed to the bridge girder 2.

FIG. 8 is a front view and a plan view showing, as a reference, a structure support that uses a part of the configuration of the present invention and that supports a bridge girder 6 made of concrete.
The lower shoe 51, the elastic support 53, and the side block 55 of this structural support are the same as those shown in FIGS. 1 and 2, and the anchor bolt 3 for fixing the lower shoe 51 is also the same. is there.
The upper shoe 52 used in this structure support is integrally formed with a shear key 54 so as to project upward from the upper surface. As shown in FIG. 8B, the shear key 54 has a planar shape extending in the axial direction of the bridge girder 6 and in the direction perpendicular to the axial line, and is provided in the shape of a dozen. The concrete of the bridge girder 6 is placed so as to come into contact with the upper surface of the upper shoe 52, and the protruding shear key 54 is embedded therein.

On the other hand, the tip of the upper shoe fixing bolt 56 is screwed into a bolt hole provided in the upper shoe 52, and the upper portion projects from the upper surface of the upper shoe and is embedded in the concrete of the bridge girder 6.
In such a structure support, the shear key 54 resists the shearing force acting between the bridge girder 6 and the upper girder 52, and the upper girder 52 is firmly fixed to the bridge girder 6.

The structure support described above is an embodiment of the present invention, and the present invention is not limited to the above-described embodiment, and the embodiment is appropriately modified and implemented within the scope of the present invention. Is something that can be done.

1: Bridge pier, 2: Bridge girder, 2a: Lower flange of bridge girder, 3: Anchor bolt, 4: Long nut, 5: Sole plate, 6: Concrete bridge girder,
11: Lower shoe, 12: Upper shoe, 12a: Recessed portion on the lower surface of the upper shoe, 12b: Notch provided on the upper shoe, 12c: Inner diameter enlarged portion of the through hole formed on the upper shoe, 13: Elastic Supports, 13a, 13b: Steel plate, 13c: Rubber layer, 13d: Steel ring, 14: Shear key, 14a Shear key cylindrical portion, 14b: Shear key expanded portion, 14c: Shear key central hole, 15: Side block, 15a: Upper protruding portion of side block, 16: Upper bolt fixing bolt, 17: Block fixing bolt, 18: Space under shear key, 21: Lower shoe, 22: Upper shoe, 22a: Upper shoe 22b: a notch provided in the upper shoe, 23: an elastic support, 23a: a sliding layer, 24: a shear key,
25: Side block, 25a: Upper side projection of side block, 26: Upper shoe fixing bolt, 27: Block fixing bolt,
Reference numeral 31: lower shoe, 32: upper shoe, 32a: recess provided on the lower surface of the upper shoe, 33: elastic support, 33a: rubber plate, 33b: intermediate plate, 33c: steel ring, 34: shear key, 35: Side block, 36: Upper shoe fixing bolt,
41: lower shoe, 42: upper shoe, 42a: bolt hole, 43: elastic support, 44: shear key, 45: side block, 46: upper shoe fixing bolt,
51: Lower shoe, 52: Upper shoe, 53: Elastic support, 54: Shear key, 55: Side block, 56: Upper shoe fixing bolt

Claims (5)

A lower shoe fixed to the lower structure,
Upper shoe fixed to the upper structure,
A rubber layer, and an elastic support inserted between the lower shoe and the upper shoe,
The upper shoe has a recess into which the elastic support is fitted upward from the lower surface,
The elastic support body, with the lower part protruding from the lower surface of the upper shoe, in a state of being fitted into the recess,
A lower surface of the elastic support is brought into contact with an upper surface of the lower shoe, and the elastic support is supported on the lower shoe ,
A plurality of upper shoe fixing bolts for fixing the upper shoe to the upper structure are coupled to the outside of the area in which the recess is provided in a plan view of the upper shoe,
A bearing for a structure , wherein a shear key for restraining a horizontal relative displacement between the upper structure and the upper shoe is provided so as to surround each of the upper shoe fixing bolts . The shear key has a cylindrical portion having a cylindrical shape, and an enlarged diameter portion whose diameter is enlarged near the lower end of the cylindrical portion,
The cylindrical portion is fitted from below into a vertical through hole provided in the upper shoe, and the enlarged diameter portion is locked to the upper shoe.
The upper portion of the cylindrical portion projects upward from the through hole and is fitted into a recess provided in the upper structure or a member fixed to the upper structure,
The upper shoe fixing bolt is inserted into a hole provided in the upper structure or a member fixed to the upper structure, and is attached to an internal thread of an inner peripheral surface of a central hole provided in the cylindrical portion of the shear key. The structure support according to claim 1, wherein the support is twisted and clamped so as to sandwich the upper shoe between the upper structure and the shear key. A space is provided below the shear key, and the height of the space is such that the cylindrical portion of the shear key is fitted into a recess provided in the upper structure or a member fixed to the upper structure. The structure support according to claim 2, wherein the support is larger than the height. The shear key has a lower portion fitted into a recess provided on the upper surface of the upper shoe,
An upper portion is fitted into a recess provided in the upper structure or a member fixed to the upper structure,
The upper shoe fixing bolt is inserted into a hole provided in the upper structure or a member fixed to the upper structure, penetrates a center hole provided in the shear key, and is a bolt provided in the upper shoe. The structure support according to claim 1, wherein the support is screwed into the hole. The structure according to any one of claims 1 to 4, wherein a slide layer is provided on the lower surface of the elastic support body, and the upper shoe is slidable on the lower shoe. Support.

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