JP4974254B1 - Thin bearing device for bridge - Google Patents

Abstract

An object of the present invention is to provide a bridge support device that can achieve a reduction in thickness, size, and cost of a bridge support device and can cope with a compressive load of an upper structure during an earthquake.
In a support device disposed between a lower structure and an upper structure, the base plate is fixed to the lower structure with a fixing bolt and a central through hole is formed. A sole plate 7 formed with a joint recess 7a, a rubber layer 10 whose upper and lower surfaces are disposed in a space in which the side surface portion is expandable in the central through hole or in the fitting recess, and the horizontal layer, Contacting with any one of the horizontal surfaces of the upper and lower surfaces of the rubber layer, located across the central through hole and the fitting recess, forming a constant gap between the base plate surface and the sole plate lower surface, and And a steel material that restrains horizontal movement between the upper structure and the lower structure, and a through-hole 11 or a recess 12 is formed on a surface of the steel material in contact with the rubber layer.

Description

  The present invention relates to a thin bridge support device installed between a bridge girder as an upper structure of a bridge and a bridge pier as a lower structure.

  Between the bridge girder, which is the upper structure of the bridge, and the pier, which is the lower structure, a support device is provided that absorbs the expansion and contraction while supporting the load of the upper structure. After the Hyogoken-Nanbu Earthquake, the seismic force was reduced by increasing the period of the structures such as buildings and bridges and using high-damping rubber-base seismic isolation bearings with high-damping rubber and laminated rubber bearings with lead plugs. Seismic isolation structures that reduce and improve seismic resistance are generally adopted.

JP 2002-38418 A

  However, laminated rubber-based seismic isolation bearings using high-damping rubber and laminated rubber bearings with lead plugs are generally expensive, so their application as seismic isolation bearings has been limited. In addition, laminated rubber bearings using high-damping rubber and laminated rubber bearings with lead plugs must be increased in thickness in order to improve seismic isolation performance. Therefore, there is a problem that it is difficult to reduce the size and size of the support device. Furthermore, it is necessary to arrange a shear restraining member for limiting the shear elastic deformation of the laminated rubber bearing due to the horizontal displacement.

  The present invention solves the above-described conventional problems, and achieves a thin, compact and low-cost bridge support device, and can cope with the compressive load of the superstructure during an earthquake. The purpose is to provide.

In order to solve the above-described problems, a thin bridge support device according to the present invention is a base plate in which a central through hole is formed in a support device disposed between a lower structure and an upper structure, which is fixed to the lower structure with a fixing bolt. And a sole plate fixed to the upper structure and formed with a fitting recess, and an upper and lower surface disposed in the central through hole or in the fitting recess with a space in which the side surface portion can expand is a horizontal plane. A certain rubber layer is in contact with any one of the upper and lower horizontal surfaces of the rubber layer, is located across the central through hole and the fitting recess, and has a certain gap between the base plate surface and the sole plate lower surface. formed, and, the the steel which restrains the horizontal movement between the upper structure and the lower structure includes a through hole or a recess formed child to permit expansion of the rubber layer on the surface in contact with the rubber layer of the steel The features.

The thin bridge support device of the present invention is a support device arranged between the lower structure and the upper structure, and is fixed to the lower structure with a fixing bolt and a base plate having a central through hole, and fixed to the upper structure. A sole plate in which a fitting recess is formed, and a rubber layer disposed in a space in which the upper steel material and the lower steel material are disposed on the upper and lower horizontal surfaces in the central through hole, and the side surface portion thereof is inflatable . The upper steel material is located across the central through hole and the fitting recess, forms a certain gap between the base plate surface and the sole plate lower surface, and between the upper structure and the lower structure A horizontal hole is constrained, and a through hole or a recess that allows expansion of the rubber layer is formed in at least one of the surfaces of the upper and lower steel members that contact the horizontal surface of the rubber layer.

The thin bridge support device of the present invention is a support device arranged between the lower structure and the upper structure, and is fixed to the lower structure with a fixing bolt and a base plate having a central through hole, and fixed to the upper structure. A sole plate formed with a fitting recess, a lower steel material having a lower portion located in the central through hole, a rubber layer having a horizontal surface in contact with an upper surface of the lower steel material, an upper portion of the lower steel material, and the rubber A layer having a space in which a side surface portion of the rubber layer can expand, is positioned in the fitting recess, and the lower steel material is positioned across the central through hole and the fitting recess, and the surface of the base plate A constant gap is formed between the lower surface of the sole plate, and the horizontal movement between the upper structure and the lower structure is restricted, and the rubber layer is allowed to expand on the surface of the lower steel material in contact with the rubber layer. Through-hole And forming a recess.

The thin bridge support device for a bridge according to the present invention includes a steel material positioned over the central through hole and the fitting recess, and a portion having substantially the same height as the surface of the base plate, and the base plate surface and the steel material . An upper reed stop member is installed between the surface of the base plate and a portion having substantially the same height, and the sole plate and the upper portion of the steel material are fixed with a set bolt.

  The thin bridge support device of the present invention is a support device arranged between the lower structure and the upper structure, and is fixed to the lower structure with a fixing bolt and a base plate having a central through hole, and fixed to the upper structure. A sole plate in which a sliding member is disposed, a rubber layer in which the upper and lower surfaces are disposed with a space in which the side surface portion is expandable in the central through hole, and a vertical horizontal surface of the rubber layer. A lower steel material and an upper steel material, wherein the lower steel material, the rubber layer, and the lower portion of the upper steel material are positioned in the central through hole, and the expansion of the rubber layer on at least one of the surfaces of the upper and lower steel materials in contact with the rubber layer Forming a through-hole or a recess allowing the upper steel material to protrude slightly from the surface of the base plate, and installing a low friction material on the upper surface of the upper steel material, the low friction material of the upper steel material and the sole And forming a sliding surface of the bridge axis direction by the sliding member of the rate.

In a support device disposed between the lower structure and the upper structure, a base plate fixed to the lower structure with a fixing bolt and formed with a central through hole, and a sole plate fixed to the upper structure and formed with a fitting recess A rubber layer whose upper and lower surfaces are disposed in the center through-hole or in the fitting recess with a space in which the side surface portion can expand, and any one horizontal surface of the upper and lower surfaces of the rubber layer; It contacts and is located over the central through hole and the fitting recess, forms a certain gap between the surface of the base plate and the lower surface of the sole plate, and restrains horizontal movement between the upper structure and the lower structure And forming a through-hole or recess that allows expansion of the rubber layer on a surface that contacts the rubber layer of the steel material, so that a part of the support is formed in the central through-hole without arranging upper and lower rods. In Is location, with steel disposed in the rubber layer can restrain the horizontal movement, it is possible to the bridge for supporting a thin. As a result, it is possible to realize ease of construction and cost reduction. Furthermore, it is larger than the case where only the side surface of the rubber layer is elastically deformed by the elastic deformation of the side surface of the rubber layer and the through hole or recess of the flat surface due to the stress at the time of the earthquake. A compressive strain can be obtained, and the rotational displacement during an earthquake can be absorbed by the rubber layer corresponding to the compressive strain.
In a support device disposed between the lower structure and the upper structure, a base plate fixed to the lower structure with a fixing bolt and formed with a central through hole, and a sole plate fixed to the upper structure and formed with a fitting recess An upper steel material and a lower steel material are disposed on the upper and lower horizontal planes in the central through hole, and a rubber layer is disposed with a space on the side surface of which can be expanded, and the upper steel material includes the central through hole and the fitting. The rubber of the upper and lower steel members is located over the concavity, forms a fixed gap between the surface of the base plate and the lower surface of the sole plate, and restrains horizontal movement between the upper structure and the lower structure. by forming the through-hole or recess to permit expansion of the rubber layer on at least one surface in contact with the horizontal surface of the layer, without arranging the upper and lower shoes, to position the portion of the bearing in the center through hole bridge It is possible to make the bearings thin, and it is possible to obtain a large compressive strain by elastically deforming and bulging the side surface of the rubber layer and the through hole or recess of the flat surface due to the stress at the time of earthquake become.
In a support device disposed between the lower structure and the upper structure, a base plate fixed to the lower structure with a fixing bolt and formed with a central through hole, and a sole plate fixed to the upper structure and formed with a fitting recess The lower steel material whose lower part is located in the central through hole, the rubber layer having a horizontal surface in contact with the upper surface of the lower steel material, the upper part of the lower steel material and the rubber layer, and the side portion of the rubber layer can expand The lower steel material is located over the central through hole and the fitting recess, and has a certain gap between the base plate surface and the bottom surface of the sole plate. Forming a through-hole or a recess that restricts horizontal movement between the upper structure and the lower structure and allows expansion of the rubber layer on the surface of the lower steel material in contact with the rubber layer. Arrange a spear It is possible to make the bridge support thin by positioning a part of the support in the central through-hole, and it is elastic to the bulge of the side surface of the rubber layer and the through-hole or recess of the flat surface due to the stress at the time of earthquake A large compressive strain can be obtained by deforming and expanding.
A portion of the steel material located across the central through hole and the fitting recess is formed to have a level substantially the same as the surface of the base plate, and the base plate surface and a portion of the steel material having the same height as the surface of the base plate; By installing an upper reed stop member between them and fixing the sole plate and the upper part of the steel material with a set bolt, it is possible to reduce the thickness of the support and to cope with horizontal displacement and upper repulsive force. It becomes possible.
In the support device arranged between the lower structure and the upper structure, a base plate fixed to the lower structure with a fixing bolt and having a central through hole, a sole plate fixed to the upper structure and having a sliding member disposed therein, and a center A rubber layer disposed in the through hole with a space that expands to the side portion thereof, and a lower steel material and an upper steel material integrated above and below the rubber layer, with the lower steel material and the lower steel material at the lower part in the center A through-hole or recess that allows expansion of the rubber layer is formed on at least one of the surfaces of the upper and lower steel members that contact the rubber layer, and the upper part of the upper steel material protrudes slightly from the surface of the base plate. By installing a friction material and forming a sliding surface in the bridge axis direction with the low friction material of the upper steel material and the sliding member of the sole plate, a part of the support is positioned in the central through hole without placing upper and lower rods Let horizontal By restraining the movement, it is possible to make the bridge support thin, and it is possible to realize ease of construction and cost reduction. Furthermore, it is larger than the case where only the side surface of the rubber layer is elastically deformed by the elastic deformation of the side surface of the rubber layer and the through hole or recess of the flat surface due to the stress at the time of the earthquake. A compressive strain can be obtained, and the rotational displacement during an earthquake can be absorbed by the rubber layer corresponding to the compressive strain.

It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention.

  1 and 2 are views showing a first embodiment of a thin bridge support device for a bridge according to the present invention.

  The thin bridge support device 1 for a bridge is installed between an upper structure 2 such as a bridge girder and a lower structure 3 such as a bridge pier. The thin bridge support device 1 of the first embodiment includes a base plate 4 that is detachably fixed by a fixing bolt 6 that is screwed to an anchor bolt 5 embedded in the lower structure 3. A sole plate 7 is fixed to the upper structure 2.

  A central through hole 4 a is formed in the central portion of the base plate 4. A fitting recess 7 a is formed on the lower surface of the sole plate 7. A rubber layer 10 whose upper and lower surfaces, which are integrally formed with the lower steel material 8 and the upper steel material 9 and are vulcanized integrally, is disposed so as to be located in the central through hole 4a of the base plate 4. Between the outer peripheral surface side of the rubber layer 10 and the inner wall of the central through hole 4a, a space in which the side surface portion of the rubber layer 10 can expand is formed. Moreover, the through-hole 11 or the recessed part 12 which accept | permits expansion | swelling of the rubber layer 10 is formed in the surface side which contact | connects the upper and lower horizontal surfaces of the rubber layer 10 of the lower steel material 8 and the upper steel material 9. The through hole 11 or the recess 12 may be formed only in either the lower steel material 8 or the upper steel material 9. A plurality of through holes 11 or recesses may be formed.

  The upper steel material 9 includes an upper steel material lower portion 9a located in the central through hole 4a, and an upper steel material upper portion 9b having a step portion with the upper steel material lower portion 9a and slightly protruding upward from the surface of the base plate 4. The upper surface of the upper steel material lower portion 9 a is set to be substantially the same height as the surface of the base plate 4. An upper repulsive force stopping member 13 is installed between the surface of the base plate 4 and the upper surface of the upper steel material lower portion 9a.

  A fitting recess 7 a is formed in the sole plate 7. A part of a portion of the upper steel material upper part 9 b protruding upward from the surface of the base plate 4 is fitted into the fitting concave part 7 a of the sole plate 7, thereby restraining the horizontal movement between the upper structure 2 and the lower structure 3. A slight gap h is formed between the surface of the base plate 4 and the lower surface of the sole plate 7 in a state where the upper steel material upper portion 9b is fitted in the fitting recess 7a. The girder, the sole plate 7 and the upper steel material upper part 9b which are the upper structure 2 are fixed with a plurality of set bolts 14.

  The thin bridge support device 1 according to the first embodiment arranges a part of the support in the central through hole 4a of the base plate 4 without arranging the upper and lower collars arranged in the conventional bridge support device. Thus, the installation height of the support device can be lowered, and the ease of construction in a narrow space and the reduction in cost can be realized. In addition, a large compressive strain can be obtained by elastic deformation of the side surface of the rubber layer and the through hole or recess of the flat surface due to the stress at the time of the earthquake. It is possible to absorb rotational displacement during an earthquake.

  3 and 4 are views showing a second embodiment of the thin bridge support device of the present invention.

  The thin bridge support device 1 for a bridge is installed between an upper structure 2 such as a bridge girder and a lower structure 3 such as a bridge pier. A thin bridge support device 1 according to the second embodiment includes a base plate 4 that is detachably fixed by a fixing bolt 6 screwed to an anchor bolt 5 embedded in the lower structure 3. A sole plate 7 is fixed to the upper structure 2.

  A central through hole 4 a is formed in the central portion of the base plate 4. A fitting recess 7 a is formed on the lower surface of the sole plate 7. The lower steel material lower portion 8 includes a lower steel material lower portion 8a located in the central through hole 4a, and a lower steel material upper portion 8b having a lower steel material lower portion 8a and a stepped portion and protruding upward from the surface of the base plate 4. The upper surface of the lower steel material lower part 8 a is set to have substantially the same height as the surface of the base plate 4. The upper reed force stopping member 13 is installed between the surface of the base plate 4 and the upper surface of the lower steel material lower portion 8a. A rubber layer 10 is disposed by vulcanization integral molding on the upper surface of the lower steel material upper portion 8b. A part of the lower steel material lower part 8 b on which the rubber layer 10 is arranged fits into the fitting recess 7 a of the sole plate 7 and restrains the horizontal movement between the upper structure 2 and the lower structure 3.

  Between the outer peripheral surface side of the rubber layer 10 and the inner wall of the fitting recess 7a of the sole plate 7, a space in which the side surface portion of the rubber layer 10 can expand is formed. A through hole 11 or a recess 12 that allows expansion of the rubber layer 10 is formed on the side of the lower steel material 8 that is in contact with the lower horizontal surface of the rubber layer 10. A plurality of through holes 11 or recesses may be formed.

  A slight gap h is formed between the surface of the base plate 4 and the lower surface of the sole plate 7 in a state where the lower steel material upper portion 8b is fitted in the fitting recess 7a. The girder which is the upper structure 2, the sole plate 7, and the lower steel material upper portion 8 b are fixed with a plurality of set bolts 14.

  The thin bridge support device 1 according to the second embodiment arranges a part of the support in the central through hole 4a of the base plate 4 without arranging the upper and lower rods arranged in the conventional bridge support device. Thus, the installation height of the support device can be lowered, and the ease of construction in a narrow space and the reduction in cost can be realized. In addition, a large compressive strain can be obtained by elastic deformation of the side surface of the rubber layer and the through hole or recess of the flat surface due to the stress at the time of the earthquake. It is possible to absorb rotational displacement during an earthquake.

    5 and 6 are views showing a third embodiment of the thin bridge support device of the present invention.

  The thin bridge support device 1 for a bridge is installed between an upper structure 2 such as a bridge girder and a lower structure 3 such as a bridge pier. The thin bridge support device 1 according to the third embodiment includes a base plate 4 that is detachably fixed by a fixing bolt 6 that is screwed to an anchor bolt 5 embedded in the lower structure 3. A sole plate 7 is fixed to the upper structure 2.

  A central through hole 4 a is formed in the central portion of the base plate 4. A rubber layer 10 whose upper and lower surfaces, which are integrally formed with the lower steel material 8 and the upper steel material 9 and are vulcanized integrally, is disposed so as to be located in the central through hole 4a of the base plate 4. Between the outer peripheral surface side of the rubber layer 10 and the inner wall of the central through hole 4a, a space in which the side surface portion of the rubber layer 10 can expand is formed. Moreover, the through-hole 11 or the recessed part 12 which accept | permits expansion | swelling of the rubber layer 10 is formed in the surface side which contact | connects the upper and lower horizontal surfaces of the rubber layer 10 of the lower steel material 8 and the upper steel material 9. The through hole 11 or the recess 12 may be formed only in either the lower steel material 8 or the upper steel material 9. A plurality of through holes 11 or recesses may be formed.

  The upper steel material 9 includes an upper steel material lower portion 9a located in the central through hole 4a, and an upper steel material upper portion 9b having a step portion with the upper steel material lower portion 9a and slightly protruding upward from the surface of the base plate 4. The upper surface of the upper steel material lower portion 9 a is set to be substantially the same height as the surface of the base plate 4. An upper repulsive force stopping member 13 is installed between the surface of the base plate 4 and the upper surface of the upper steel material lower portion 9a.

  A low friction plate 15 made of a low friction material such as tetrafluoroethylene is integrally installed on the upper surface of the upper steel upper portion 9b. A stainless steel sliding plate 16 is installed on the lower surface of the sole plate 7 fixed to the upper structure 2. A slight gap h is formed between the surface of the base plate 4 and the lower surface of the sole plate 7. The low friction plate 15 fixed to the lower structure 3 and the sliding plate 16 fixed to the upper structure 2 form a sliding bearing that allows movement in the bridge axis direction.

  The thin bridge support device 1 according to the second embodiment arranges a part of the support in the central through hole 4a of the base plate 4 without arranging the upper and lower rods arranged in the conventional bridge support device. Thus, the installation height of the support device can be lowered, and the ease of construction in a narrow space and the reduction in cost can be realized. In addition, a large compressive strain can be obtained by elastic deformation of the side surface of the rubber layer and the through hole or recess of the flat surface due to the stress at the time of the earthquake. It is possible to absorb rotational displacement during an earthquake.

  1: thin bridge support device, 2: upper structure, 3: lower structure, 4: base plate, 4a: central through hole, 5: anchor bolt, 6: fixing bolt, 7: sole plate, 7a: fitting recess, 8 : Lower steel material, 8a: Lower steel material lower part, 8b: Lower steel material upper part, 9: Upper steel material, 9a: Upper steel material lower part, 9b: Upper steel material upper part, 10: Rubber layer, 11: Through hole, 12: Recessed part, 13: Upper Repulsion stop member, 14: set bolt, 15: low friction plate, 16: sliding member

Claims (5)

In the support device arranged between the lower structure and the upper structure,
A base plate fixed to the lower structure with fixing bolts and having a central through hole;
A sole plate fixed to the upper structure and formed with a fitting recess;
A rubber layer whose upper and lower surfaces disposed in the central through hole or in the fitting recess with a space that allows the side surface to expand, is a horizontal plane,
Contacting the horizontal surface of any one of the upper and lower surfaces of the rubber layer, located over the central through hole and the fitting recess, forming a constant gap between the surface of the base plate and the lower surface of the sole plate; and A steel material that restrains horizontal movement between the upper structure and the lower structure;
With
A thin bearing device for a bridge, wherein a through hole or a recess allowing the rubber layer to expand is formed on a surface of the steel material in contact with the rubber layer . In the support device arranged between the lower structure and the upper structure,
A base plate fixed to the lower structure with fixing bolts and having a central through hole;
A sole plate fixed to the upper structure and formed with a fitting recess;
In the central through hole, the upper steel material and the lower steel material are disposed on the upper and lower horizontal planes, and the side surface portion is disposed with a space that can expand, and a rubber layer,
With
The upper steel material is located across the central through hole and the fitting recess, forms a certain gap between the base plate surface and the sole plate lower surface, and between the upper structure and the lower structure A thin bridge support device for a bridge, characterized in that a horizontal hole is constrained to form a through hole or a recess that allows expansion of the rubber layer in at least one of the surfaces of the upper and lower steel members contacting the horizontal surface of the rubber layer. In the support device arranged between the lower structure and the upper structure,
A base plate fixed to the lower structure with fixing bolts and having a central through hole;
A sole plate fixed to the upper structure and formed with a fitting recess;
A lower steel material whose lower part is located in the central through hole;
A rubber layer having a horizontal surface in contact with the upper surface of the lower steel material;
The upper portion of the lower steel material and the rubber layer are positioned in the fitting recess with a space where the side surface portion of the rubber layer can expand,
The lower steel material is located across the central through hole and the fitting recess, forms a certain gap between the base plate surface and the sole plate lower surface, and between the upper structure and the lower structure A thin bridge support device for a bridge, characterized in that a horizontal hole is constrained and a through hole or a recess is formed on a surface of the lower steel material in contact with the rubber layer to allow expansion of the rubber layer. A portion of the steel material located across the central through hole and the fitting recess is formed to have a level substantially the same as the surface of the base plate, and the base plate surface and a portion of the steel material having the same height as the surface of the base plate; The upper reed stop member is installed between
The thin bearing device for a bridge according to any one of claims 1 to 3, wherein the sole plate and an upper portion of the steel material are fixed with a set bolt. In the support device arranged between the lower structure and the upper structure,
A base plate fixed to the lower structure with fixing bolts and having a central through hole;
A sole plate fixed to the superstructure and provided with sliding members;
A rubber layer whose upper and lower surfaces are arranged in a horizontal plane in the central through hole with a space that can expand,
A lower steel material and an upper steel material in contact with the upper and lower horizontal surfaces of the rubber layer;
With
The lower steel material, the rubber layer and the lower part of the upper steel material are positioned in the central through hole,
Forming a through-hole or a recess allowing the expansion of the rubber layer in at least one of the surfaces of the upper and lower steel materials in contact with the rubber layer;
The upper part of the upper steel material is slightly protruded from the surface of the base plate, and a low friction material is installed on the upper surface of the upper steel material,
A thin bridge support device for a bridge, wherein the low friction material of the upper steel material and the sliding member of the sole plate form a sliding surface in the bridge axis direction.

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