JP2007262691A - Sliding bearing and its mounting method and seismic isolation structure - Google Patents

Abstract

Provided is a sliding bearing which exhibits a seismic isolation function with a simple structure that is easy to mount and reduces costs.
A sliding bearing 10 is mounted between a housing structure 30 and a foundation 40 or a base 20. The upper slide plate 12 having a downward sliding surface attached along the longitudinal direction of the horizontal member 16 of the housing structure 30 and the lower slide having an upward sliding surface attached along the longitudinal direction of the foundation 40 or the base 20. Plate 14, the longitudinal direction of horizontal member 16 is placed in a direction crossing the longitudinal direction of foundation 40 or base 20, and the sliding surfaces of upper sliding plate 12 and lower sliding plate 14 are slidable relative to each other. To do.
[Selection] Figure 1

Description

  The present invention relates to a sliding bearing for seismic isolation that is installed between a house structure and a foundation, a method for attaching the same, and a seismic isolation structure.

  The conventionally used seismic isolation method is a method to reduce the input ground motion during an earthquake by insulating the ground and foundation structure from the superstructure of the building and inserting a seismic isolation device between them to lengthen the building. Has been taken. This seismic isolation device mainly includes an isolator that supports a building and moves gently during an earthquake, and a damper that acts to suppress shaking.

  Structures to which seismic isolation devices are attached include large and heavy structures such as condominiums, and lightweight structures such as detached houses, and various isolator and damper combinations are used due to the difference in the weight of the structures. Yes. In heavy structures such as condominiums, there are generally combinations using laminated rubber bearings as isolators and lead dampers or steel dampers as dampers. On the other hand, a light structure such as a detached house building generally uses a sliding bearing as a isolator and a damper and a combination of restoring force rubber, or a rolling bearing as an isolator and an oil damper as a damper.

  A detached house building is lighter than a large structure and needs to have extremely low horizontal rigidity (restoring force characteristics) in order to increase the period. Therefore, the restoring force rubber used for a detached house building does not support the building weight (vertical load), and is used only to give only horizontal rigidity. When this restoring force rubber is used, the building weight is supported by the sliding support.

  FIG. 12 is an explanatory view of a conventional seismic isolation device using a sliding bearing. As shown in the figure, a sliding bearing 103, a restoration rubber 109, and a steel frame 104 are attached between the detached house building 100 and the foundation slab 102. In the sliding support 103, a lower sliding plate 105 of a metal plate is attached on a concrete mount 106, and an upper sliding plate 108 is slidably mounted on the lower sliding plate 105. And the wooden house is assembled on the steel frame 104 (for example, it shows in patent document 1). Such a sliding bearing uses the frictional force as a damping force (damper function) by supporting the weight of the building and having a predetermined coefficient of friction.

FIG. 13 is a diagram showing a schematic configuration of a seismic isolation device using a conventional rolling bearing. As shown in the figure, the rolling bearing 200 is composed of a hard sphere 201 and a pair of spherical trays 202, and supports the weight of the building and at the same time has a function of lengthening and restoring. Rolling bearings generally have a damping function because the coefficient of friction is close to zero. For this reason, it is necessary to attach the oil damper 203 and the fixing device 204 in order to suppress deformation movement due to vibration (for example, shown in Patent Document 2).
JP 11-293951 A Japanese Patent Laid-Open No. 2005-30071

  Conventional seismic isolation structures with sliding bearings need to be installed with more sliding bearings in order to support a plurality of columns. Therefore, by using a steel frame between the sliding support and the building, the load of the column can be dispersed on the steel frame, and the vertical rigidity can be sufficiently secured, so that the number of installed sliding supports can be reduced. Furthermore, by ensuring the rigidity in the horizontal direction, it is possible to reliably transmit the vertical load and the horizontal load (earthquake load) to the ground through the seismic isolation device while greatly displacing in the horizontal direction during an earthquake. However, the use of a steel frame has resulted in an extra foundation on the building side in addition to the foundation slab of the ground, which has been a factor in increasing the seismic isolation cost.

  Further, the sliding bearing is configured such that the upper sliding plate is in contact with the lower sliding plate at one point. Therefore, in consideration of the magnitude of the earthquake assumed at the time of design, the metal plate serving as the lower sliding plate on which the upper sliding plate slides needs to have a large sliding area to cover the movable range in all directions. For this reason, there existed a problem that the cost of the whole seismic isolation apparatus started. Furthermore, the sliding bearing must be installed in a state where the upper sliding plate and the lower sliding plate are in close contact with each other. For this purpose, all the lower sliding plates must be installed horizontally at a predetermined height with high accuracy. However, it is extremely difficult to install the lower sliding plate directly on the concrete foundation slab with high accuracy in terms of construction accuracy. For this reason, a steel plate having a thickness of 10 to 20 mm called a base plate is installed, and a lower sliding member is attached to the base plate. After placing the concrete foundation slab, the base plate is temporarily fastened with accuracy in a predetermined position, and then fixed with grout or mortar. This base plate and the base plate construction method push up the cost of sliding support.

  Accordingly, the present invention has been made in view of the problems of these conventional methods, and is intended to reduce the cost with a simple structure that is easy to mount, and to provide a seismic isolation function, a sliding bearing mounting method, and a seismic isolation structure. The purpose is to provide.

  In the current seismic isolation device and seismic isolation design, the necessary minimum seismic isolation performance is set in consideration of the earthquake assumed at the time of design and the manufacturing cost of the seismic isolation device. For this reason, no countermeasures have been taken in the event of an earthquake exceeding the earthquake assumed at the time of design. When an earthquake that greatly exceeds the earthquake assumed at the time of design occurs, in the case of a sliding bearing, the upper sliding plate falls from the lower sliding plate, and in the case of a rolling bearing, the internal rigid ball jumps out of the receiving tray and acts as a seismic isolation device. You will lose functionality. In this way, if the seismic isolation function does not work during the design limit deformation, the building will be impacted and considered to be severely damaged.

  An object of the present invention is to provide a sliding bearing that exhibits a seismic isolation function even when an earthquake more than expected, a mounting method thereof, and a seismic isolation structure.

  The sliding bearing of the present invention is a sliding bearing attached between a housing structure and a fabric foundation, and an upper sliding plate having a sliding surface attached downward along the longitudinal direction of the horizontal member of the housing structure; A lower sliding plate provided with an upward sliding surface attached along the longitudinal direction of the fabric foundation, and the longitudinal direction of the horizontal member is placed in a direction crossing the longitudinal direction of the fabric foundation, The sliding surfaces of the upper sliding plate and the lower sliding plate are slidable with respect to each other.

  A sliding bearing attached between the housing structure and the foundation, the upper sliding plate having a sliding surface attached downward along the longitudinal direction of the horizontal member of the housing structure, and a wooden on the foundation And a lower sliding plate having an upward sliding surface attached along the longitudinal direction of the foundation, and placing the longitudinal direction of the horizontal member in a direction crossing the longitudinal direction of the foundation The sliding surfaces of the upper sliding plate and the lower sliding plate are slidable with respect to each other.

  In this case, the upper slide plate and the lower slide plate may both be U-shaped in cross section and have a sliding surface formed in a flat shape. The upper sliding plate may be attached by fitting the concave portion having a U-shaped cross section along the longitudinal direction of the horizontal member.

  The sliding bearing mounting method of the present invention is such that an upper sliding plate having a downward sliding surface along the longitudinal direction of the horizontal member of the house structure is attached, and an upward sliding surface is provided along the longitudinal direction of the foundation foundation. A mounting height of the upper sliding bearing or the lower sliding bearing formed in a U-shaped cross-section by mounting the lower sliding plate provided and placing the longitudinal direction of the horizontal member in a direction crossing the longitudinal direction of the base Is adjusted so that the sliding surfaces of the upper sliding plate and the lower sliding plate are brought into close contact with each other.

  The seismic isolation structure of the present invention is a seismic isolation structure having a sliding support attached between a housing structure and a fabric foundation, wherein a plurality of rows of the fabric foundation are arranged side by side, A plurality of horizontal members of the housing structure are placed in the crossing direction, and an upper sliding plate having a downward sliding surface attached along the longitudinal direction of the horizontal member, and along the longitudinal direction of the cloth foundation A lower sliding plate having an upwardly facing sliding surface, wherein the upper sliding plate and the lower sliding plate are attached so that the intersection of the upper sliding plate and the lower sliding plate coincides with the column axis of the housing structure.

  Moreover, it is a seismic isolation structure provided with the sliding support attached between a housing structure and a fabric foundation, arrange | positioning the said fabric foundation slightly smaller than the outer periphery of the said housing structure, and several of the said housing structures An upper sliding plate having a sliding surface that is mounted along the longitudinal direction of the horizontal member of the residential structure and has a downward sliding surface. A lower sliding plate having an upward sliding surface attached along the longitudinal direction of the housing, and the intersection of the upper sliding plate and the lower sliding plate is attached to the inner side of the column axis of the edge of the housing structure It is said.

  Furthermore, a seismic isolation structure having a sliding bearing attached between the housing structure and the foundation, wherein a plurality of rows of wooden foundations installed on the foundation are arranged side by side in the crossing direction of the foundation rows. A plurality of horizontal members of the housing structure are mounted, an upper sliding plate having a downward sliding surface attached along the longitudinal direction of the horizontal member, and an upward sliding attachment along the longitudinal direction of the foundation A lower sliding plate having a surface, and is attached so that an intersection of the upper sliding plate and the lower sliding plate coincides with a column axis of the housing structure.

  Also, a seismic isolation structure having a sliding bearing attached between the housing structure and the foundation, wherein a wooden base placed on the foundation that is slightly smaller than the outer periphery of the housing structure is arranged, and a plurality of The horizontal sliding member of the housing structure is placed on the base by intersecting on the same plane, and the upper sliding plate having a downward sliding surface attached along the longitudinal direction of the horizontal member of the residential structure And a lower sliding plate having an upward sliding surface attached along the longitudinal direction of the base, and the intersection of the upper sliding plate and the lower sliding plate is inside the column axis at the edge of the housing structure. It is characterized by being attached.

  According to the present invention having the above-described configuration, the upper sliding support is attached along the longitudinal direction of the lowermost horizontal member of the house structure, and the longitudinal direction of the wooden base in which the lower sliding support is provided on the cloth foundation or the foundation. Are mounted so that the longitudinal direction of the fabric foundation or base and the longitudinal direction of the horizontal member intersect each other, and the upper sliding plate and the lower sliding plate are slidable with respect to each other. For this reason, it is possible to set a wide range of sliding between the upper and lower plates with a minimum configuration consisting of a plate-like upper slide plate and lower slide plate, and to exhibit a wide range of seismic isolation functions with a simple structure. Become.

  Further, both the upper slide plate and the lower slide plate are formed in a U-shaped cross section. For this reason, if a gap occurs when a horizontal member is placed on the fabric foundation or base due to construction errors, the upper and lower sliding plates are adjusted by adjusting the opening positions of the bolt holes on the upper or lower sliding plate. The sliding surface of the plate can be brought into close contact. Therefore, construction for ensuring installation accuracy is facilitated, and cost can be reduced by labor saving. In addition, the upper sliding plate is attached by fitting a recess with a U-shaped cross section along the longitudinal direction of the horizontal member, so it has higher bending rigidity and bending strength than when a flat plate is attached to the horizontal member. The structure resists shearing force and bending moment due to force, and can reinforce the horizontal member.

  The upper sliding plate and the lower sliding plate are thin plates, and the sliding surfaces of each other are formed flat. For this reason, the level difference between the upper sliding plate and the horizontal member and the level difference between the lower sliding plate and the cloth foundation or base can be set sufficiently small. The upper sliding plate is attached along the longitudinal direction of the horizontal member, and the lower sliding plate is attached along the longitudinal direction of the cloth foundation or base. For this reason, seismic isolation structures with slip bearings are designed so that even if an unexpected earthquake exceeding the set length of the slip bearing occurs and the deformation occurs, the horizontal members and cloth foundations or foundations that cross each other are not supported. Instead of supporting the floor surface of the housing structure, it prevents the housing structure from falling off and does not give an impact.

  When a step is generated at the end portions of the upper and lower slide plates, a tapered portion is attached as necessary. For this reason, even when the upper slide plate or the lower slide plate moves beyond the set length, it can move gently along the tapered slope, so that the impact on the housing structure can be reduced.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a sliding bearing, its mounting method, and a seismic isolation structure of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a diagram showing a schematic configuration of a sliding bearing according to an embodiment of the present invention. FIG. 1 (1) is an explanatory view in which a sliding support is attached to a cloth foundation, and (2) is an explanatory view in which a sliding support is attached to a base. FIG. 2 is an explanatory diagram of an upper slide plate and a lower slide plate according to the embodiment. FIG. 3 is a configuration explanatory diagram of the seismic isolation structure according to the embodiment.

  The case where the sliding bearing 10 of the present invention is applied as an attachment target, for example, to a detached house building will be described. Generally, in a detached house building, a wooden base is fixed on a concrete cloth foundation by a fixing means such as an anchor bolt. As shown in FIG. 3, the sliding support 10 according to the embodiment is formed between the housing structure 30 and the foundation 40, and includes the upper sliding plate 12 and the lower sliding plate 14 as main components. The upper sliding plate 12 is attached to the lower surface of the horizontal member 16 constituting the floor of the house structure 30 as shown in the figure. On the other hand, the lower sliding board 14 is attached to the upper surface of the wooden base 20 installed on the concrete foundation 40 in the case of FIG.

  As shown in FIG. 1, the upper sliding plate 12 is a thin plate whose lower surface is attached along the lower surface in the longitudinal direction of the horizontal member 16 of the floor of the house structure. The length of the upper sliding plate 12 in the longitudinal direction is set to a length that takes into account the lateral movement of the housing structure placed on the foundation by an assumed earthquake. In the embodiment, the upper sliding plate 12 is, for example, a stainless plate having a thickness of about 2 to 3 mm, or a thin plate in which a friction surface treatment such as a Teflon (registered trademark) coating is applied to the surface, or a rust prevention treatment and a Teflon (registered trademark). ) A thin plate such as a steel plate with a friction surface treatment such as coating applied to the surface is used.

  On the other hand, as shown in FIG. 1A, the lower sliding plate 14 is placed on the upper surface of the fabric foundation 38, and the upper surface attached along the longitudinal direction of the fabric foundation 38 is a thin plate having a rectangular shape. Alternatively, as shown in FIG. 1 (2), a wooden rod-like base 20 may be placed on the upper surface of the foundation 40 and attached along the longitudinal direction of the base 20. The foundation 40 includes an independent foundation, a solid foundation, etc. as shown in FIG. 11 (1) in addition to the cloth foundation 38 shown in (1). Further, when the wooden base 20 is placed on an independent foundation or a solid foundation, a configuration as shown in FIG. That is, in the case of an independent foundation, the independent foundations are arranged in a straight line, and a bar-like base 20 is placed on each upper end. In the case of a solid foundation, a rod-like base 20 can be attached to a rectangle along the outer periphery of the solid foundation, and a plurality of bases 20 can be arranged in parallel according to the size of the solid foundation inside the rectangle.

  The length in the longitudinal direction of the lower sliding plate 14 is set to a length that takes into account the lateral movement of the house structure placed on the base due to the assumed earthquake in the same manner as the upper sliding plate 12. In the embodiment, the lower sliding plate is, for example, a stainless plate having a thickness of about 2 to 3 mm, a thin plate having a friction surface treatment such as a Teflon (registered trademark) coating on the stainless plate, or a rust prevention treatment and Teflon (registered trademark). ) A thin plate such as a steel plate with a friction surface treatment such as coating applied to the surface is used.

  As shown in FIG. 2, the upper sliding plate 12 and the lower sliding plate 14 both have a U-shaped cross section. The upper sliding plate 12 is bent in a U shape according to the lower surface and side surface of the horizontal member, and the surface facing the lower surface of the horizontal member is used as the sliding surface with the lower sliding plate 14. The U-shaped upper sliding plate 12 is adapted to fit the recess 13 from the lower surface side of the horizontal member. On the pair of side surfaces of the upper sliding plate 12, a plurality of a pair of attachment holes 22 for attachment to the side surfaces of the horizontal member by fastening means such as bolts are provided. Further, a plurality of a pair of temporary fixing holes 24 are provided around the attachment hole 22.

  The lower sliding plate 14 is bent in a U-shaped cross section in accordance with the upper and side surfaces of the fabric foundation or foundation, and the surface facing the upper surface of the fabric foundation or foundation is used as the sliding surface with the upper sliding plate 12. The U-shaped lower sliding plate 14 fits the concave portion 15 from the upper surface side of the fabric foundation or base. Similar to the upper sliding plate 12, a plurality of a pair of mounting holes 22 are provided on the pair of side surfaces of the lower sliding plate 14 to be attached to the side surfaces of the cloth foundation or the base by fastening means such as bolts. Further, a plurality of a pair of temporary fixing holes 24 are provided around the attachment hole 22. Note that the upper sliding plate 12 and the lower sliding plate 14 may be made of C-type steel matching the width of the cloth foundation or foundation.

  As shown in FIG. 3, the seismic isolation structure 50 according to the embodiment includes a housing structure 30 and a foundation 40 as main components. Hereinafter, a case where the wooden base 20 is placed on the foundation 40 and the lower slide plate 14 is attached will be described.

  First, in the housing structure 30, a plurality of horizontal members 16 constituting the floor are arranged in parallel, and horizontal connecting members 17 that connect the horizontal members 16 are attached in the crossing direction of the horizontal members 16. And the pillar 26 which stands up on the plane of the formed horizontal member 16 is attached along an edge, and the beam which connects the upper end of the pillar 26 is attached to the planar rectangular shape. An upper sliding plate 12 is attached to a plurality of horizontal members 16 arranged in parallel at positions intersecting with a wooden base 20. At this time, the upper sliding plate 12 is attached by fitting the concave portion 13 having a U-shaped cross section along the longitudinal direction of the horizontal member 16.

  On the other hand, the foundation 40 is formed in a plane rectangular shape by arranging a plurality of foundation concrete rows in parallel at predetermined intervals, and providing foundation concrete orthogonal to the ends of each row. A lower sliding plate 14 is attached to the upper surface of the foundation 40 via a rod-shaped wooden base 20. The seismic isolation structure 50 is placed on the foundation 40 having the lower sliding plate 14 so that the horizontal member 16 is orthogonal.

  A method for attaching the sliding bearing with the above configuration will be described below. FIG. 4 is an explanatory diagram for attaching the lower sliding plate to the foundation. FIG. 5 is an explanatory diagram for attaching the upper sliding plate to the horizontal member.

  First, as shown in FIG. 4 (1), a concrete foundation 40 that supports the floor surface of the house structure 30 is placed. As an example in the embodiment, the foundation 40 is formed by arranging four straight rows of concrete foundations in parallel, and connecting them with two rows of foundation concrete in a direction perpendicular to both ends of each foundation concrete to form a rectangular plane. . A plurality of anchor bolts 27 are embedded in the vertical direction at predetermined intervals on the upper surface of the plurality of rows of foundation concrete. Further, the upper surface of the foundation 40 may be finished horizontally by mortar finishing after placement.

  Next, as shown in FIG. 4 (2), a rod-shaped wooden base 20 is attached along the longitudinal direction of the upper surface of the foundation 40 on which the house structure 30 is placed. The base 20 is provided with a plurality of holes through which the anchor bolts 27 pass in advance, and is fixed to the upper end of the foundation 40. It should be noted that the head of the anchor bolt 27 does not protrude from the upper surface of the base at a location where a lower sliding plate 14 to be described later is attached.

  And as shown in FIG.4 (3), it is good to temporarily arrange | position the lower sliding board 14 in the predetermined location of the upper surface of the base 20 where the horizontal member 16 of the house structure mentioned later cross | intersects. The lower sliding plate 14 has a U-shaped cross section that matches the thickness width of the base 20. For this reason, it can arrange | position easily, without shifting | deviating to the upper surface of the base 20, by fitting the recessed part of the lower slide board 14 to the upper surface of the base 20. FIG.

  Next, as shown in FIG. 5 (1), the horizontal member 16 constituting the floor surface of the house structure 30 is placed on the upper surface of the foundation 40. The horizontal member 16 has been processed in advance for construction work in a post process such as a mortise of a pillar, a tenon of a joist, and a joint. Further, the upper sliding plate 12 is temporarily fixed to the lower surface of the horizontal member 16 through the temporary fixing holes 24 in advance at a location intersecting the base 20. At this time, the upper sliding plate 12 is formed in a U-shaped cross section corresponding to the thickness width of the horizontal member 16, and therefore, the concave side of the upper sliding plate 12 is fitted to the lower surface of the horizontal member 16 to temporarily fix the holes. By attaching via 24, it can be easily temporarily attached to the lower surface of the horizontal member 16 without being displaced. After a position corresponding to the attachment hole 22 of the horizontal member 16 is opened with a rotary drill or the like, a fastening bolt is inserted into the attachment hole 22 to fix the upper sliding plate 12 to the horizontal member 16. A plurality of horizontal members 16 to which the upper sliding plate 12 is attached are placed in parallel on the base 20 at predetermined intervals.

  Then, as shown in FIG. 5 (2), the horizontal connecting member 17 is attached in a direction orthogonal to the plurality of horizontal members 16 arranged in parallel. Adjust the height and level of the entire floor of the first floor of the building. After the height adjustment and level adjustment of the floor surface of the first floor of the building are completed, the lower slide plate 14 is fixed to the base 20. That is, after a position corresponding to the mounting hole 22 of the lower sliding plate 14 of the base 20 is opened by a rotary drill or the like, a fastening bolt is inserted into the mounting hole 22 to fix the lower sliding plate 14 to the wooden base 20.

  FIG. 6 is an explanatory view showing a method for attaching the sliding bearing. As shown in Fig. 6 (1), the structural framework of the first floor of the building is performed, and when the height and level of the floor of the first floor of the building are adjusted, the upper slide plate 12 and the lower slide plate 14 are crossed. There may be gaps due to construction errors. When such a gap is generated, the height position of the lower sliding plate 14 can be adjusted as shown in FIG. That is, the lower sliding plate 14 placed on the wooden base 20 is lifted until it comes into close contact with the upper upper sliding plate 12, and nails or the like are driven into one temporary fastening hole. Next, using a level, the lower sliding plate 14 is adjusted horizontally, and then temporarily fixed to the base 20 with several nails. After the temporary attachment of the lower sliding plate 14 is completed, a position corresponding to the mounting hole 22 of the lower sliding plate 14 of the base 20 is opened with a rotary drill or the like, and then a fastening bolt is inserted into the mounting hole 22 to remove the lower sliding plate 14. Fix to the base 20. A flat plate or the like may be inserted into the gap between the base 20 and the lower sliding plate 14 to reinforce the strength against the load of the upper sliding plate 12 acting on the lower sliding plate 14.

  FIG. 7 is an explanatory view showing a modified example of the lower sliding bearing. As described above, an installation error unavoidable in construction may occur between the upper slide plate 12 and the lower slide plate 14. In order to eliminate this error, the lower sliding plate 14 is lifted upward to eliminate the gap with the upper sliding plate 12 and attached to the base 20. If it does so, a level | step difference will arise between the base 20 and a lower slide board. When this level difference becomes large, when the upper sliding plate 12 slides on the lower sliding plate 14 and falls from the lower sliding plate 14, an impact is generated on the housing structure 30. In this case, a lower slide plate 14a as shown in FIG. At both ends of the lower sliding plate 14a, a flange portion 14c protruding in the longitudinal direction is formed. The brim portion 14 c is preferably formed to be equal to or greater than the thickness width of the upper surface of the base 20. When a step is generated by attaching the lower slide plate 14a along the longitudinal direction of the upper surface of the base 20, the step can be eliminated by bending both ends of the lower slide plate 14 downward as shown in FIG. . Further, as shown in FIG. 7 (3), a tapered member 28 having a triangular side section may be used. The taper member 28 includes a pair of attachment holes 28 a, and the slope 28 b is formed to have the same width as the thickness width of the base 20. When a step is generated between the base 20 and the lower slide plate 14, the slope 28 b of the pair of taper members 28 is inserted into the attachment holes 28 a along the longitudinal direction of the base 20 at both ends of the lower slide plate 14. And attach. Thereby, a level | step difference can be eliminated. On the other hand, when the lower slide plate 14a is attached along the longitudinal direction of the upper surface of the base 20, no step is produced, and the lower slide plate 14a can be attached along the upper surface of the wooden base 20 without being bent. By providing a taper at both ends of the lower sliding plate in this way, there is no step between the base and the lower sliding plate, and even if the upper sliding plate moves laterally beyond the set length of the lower sliding plate, the housing structure Impacts acting on objects can be reduced.

  After the bolts of all the lower sliding plates placed on the base 20 are fixed, the upper structure is constructed, for example, a plurality of columns 26 are built on the horizontal member 16 as shown in FIG. 5 (3). .

  The seismic isolation structure 50 is placed so that a plurality of rows of foundation concrete and foundation 20 of the foundation 40 and a plurality of rows of horizontal members are orthogonal to each other. For this reason, even when an earthquake exceeding the expected length of the lower sliding plate 14 occurs and the upper sliding plate 12 moves laterally and the sliding surfaces are displaced, the longitudinal direction of the lower sliding plate The housing structure 30 can be supported by the base 20 and the horizontal member 16 in the longitudinal direction of the upper sliding plate. Therefore, it is not necessary to provide a stopper for preventing the slip plates from falling off even if the sliding surface of the sliding bearing is formed in a flat shape.

  The position of the sliding support 10 can be adjusted by either the upper sliding plate 12 or the lower sliding plate 14. However, since the upper sliding plate 12 also serves as a bending reinforcement of the horizontal member 16, it is desirable that the upper slide plate 12 is attached in advance in close contact with the horizontal member 16 without a gap. Moreover, in order to absorb the construction error and install the lower sliding plate 14 with high accuracy, it is desirable to perform the fixing work after installing the upper structure floor assembly.

  The upper sliding plate 12 attached along the longitudinal direction of the horizontal member 16 and the lower sliding plate 14 attached along the longitudinal direction of the base 20 intersect each other. For this reason, even if the upper sliding plate 12 and the lower sliding plate 14 intersect each other, they can be easily attached and detached (removed) by moving one of them in a direction away from the intersection.

  The slide support attached to the seismic isolation structure has been described with the configuration in which the lower slip plate is attached to the foundation of the foundation, but the same effect as above can be achieved even when the lower slide plate is directly attached to the fabric foundation. be able to.

  FIG. 8 is an explanatory view showing a modification of the seismic isolation structure according to the embodiment. FIG. 1 (1) shows a plan sectional view of the seismic isolation structure. FIG. 2B shows a partially enlarged view of the side portion of the seismic isolation structure. FIG. 3 (3) shows a partially enlarged view of the corner of the seismic isolation structure. Since the seismic isolation structure 50 shown in FIG. 5 is the sliding bearing 10 in which the upper sliding plate 12 and the lower sliding plate 14 intersect each other, both ends of the horizontal member 16 protrude from the foundation 40 to the outer periphery of the building. Further, both ends of the foundation 40 protrude from the horizontal member 16 to the outer periphery of the building. The protruding horizontal member 16 and the foundation 40 can be covered by a dog run or the like in which a flat plate is attached to the surface of the protruding portion. However, the projecting horizontal member 16 may not be preferable in terms of building design. In such a case, a seismic isolation structure 50a as shown in FIG. 8 can be used. That is, the seismic isolation structure 50a uses a foundation 40a that is slightly smaller than the outer periphery of the housing structure 30a. The housing structure 30a surrounds the outer periphery of the floor surface with a horizontal frame member 32a and a vertical frame member 32b. A plurality of horizontal members 16a and 16b are arranged side by side in a direction that intersects vertically and horizontally in the same plane as the members 32a and 32b. The lower sliding plate 14 constituting the sliding bearing attached to the seismic isolation structure 50a is attached to the upper surface of the wooden bases 20a and 20b fixed to the outer periphery of the foundation 40a and the concrete foundation rows arranged in parallel. On the other hand, the upper sliding plate 12 is attached to the lower surfaces of the horizontal members 16 a and 16 b facing the lower sliding plate 14.

  As shown in FIG. 8 (2), the sliding bearing that supports the column shaft on the side portion of the housing structure 30a is installed at the intersection of the sliding bearing inside the column shaft.

  Here, the relationship between the column axis and the fulcrum reaction force of the sliding bearing will be described. FIG. 9 is an explanatory diagram of the fulcrum reaction force between the column axis and the sliding bearing. FIG. 1 (1) shows a conventional sliding bearing, and FIG. 2 (2) shows the sliding bearing of the present invention. As shown in the dotted line of (1), the conventional sliding bearing has attached the sliding bearing directly under the pillar axis | shaft 25 of a house structure. For this reason, even if the housing structure moves to the right in (1) due to the earthquake, the sliding bearing is also linked to the column shaft 25, so the position of the column axial force a after vibration and the fulcrum reaction force b of the sliding bearing is There is no change. On the other hand, when the sliding bearing according to the embodiment is used, when the lower sliding bearing is attached just below the pillar shaft 25 of the housing structure and the housing structure moves in the right direction of (2) due to the earthquake, the upper sliding plate Since 12 moves while maintaining a crossing state with the lower sliding plate 14, the positions of the column axial force a after vibration and the fulcrum reaction force b of the sliding bearing change. As shown in (1), even when a sliding bearing is installed immediately below the column shaft 25, bending force and shearing force act on the horizontal member 16 when the sliding bearing is displaced during an earthquake. There is almost no difference in the shearing force between the case where the sliding bearing is installed immediately below the column shaft 25 shown in (1) and the case where the sliding bearing is installed inside the outer periphery of the building shown in (2). However, the bending moment is about twice as large as (2).

The upper sliding plate 12 of the present invention is attached by being formed in a U-shaped cross section and in close contact with the horizontal member. For this reason, compared to the case of the horizontal member alone, the bending rigidity and the bending strength are greatly reinforced. For example, when a stainless steel plate having a thickness of 3 mm is formed into a 105 mm × 105 mm U-shape, bending rigidity Es · Is (Es: Young's modulus of stainless steel 2.1 × 10 ⁴ kN / cm ² , Is: secondary moment of inertia 116 cm ⁴ ) Is 2.4 × 10 ⁶ kN / cm ² , and the bending rigidity Ew · Iw (Ew: Young's modulus of wood 980 kN / cm ² , Iw: cross-sectional second moment of wood 2400 cm ⁴ ) of 105 mm × 140 mm is It becomes 2.4 × 10 ⁶ kN / cm ^{2 and is} almost equivalent. Therefore, a sufficiently large reinforcing effect can be expected. By forming the cross section into a U shape, the bending rigidity and bending strength can be made higher than those of the flat plate.

  Bending the cross section of the upper sliding plate 12 in this way can easily attach the upper sliding plate 12 to the horizontal member 16 and increase the bending rigidity.

  By the way, the pillars 26 at the four corners of the seismic isolation structure 50a are at the corners where the support members 32a and 32b are orthogonal to each other, and the sliding bearings in which the upper sliding plate and the lower sliding plate cross each other cannot be attached to the corners of the opposing foundation 40a. . Therefore, as shown in FIG. 8 (3), a mounting member 32c that is coplanar with the mounting members 32a and 32b and is supported from directly below the column axis toward the center is attached. An oblique base 40c is formed at the corner of a rectangular base 40a where the base material 32c intersects, and a base 20c is provided on the upper surface to support the base material 32c. The upper sliding plate 12 is attached to the lower surface of the frame member 32c along the longitudinal direction. A base 20c is provided on the upper surface of the oblique base 40c, and the lower slide plate 14 is attached along the longitudinal direction. Then, the upper slide plate 12 and the lower slide plate 14 cross each other.

  The seismic isolation structure 50a according to the embodiment has a structure in which the pillars 26 at the four corners are supported by the frame member 32c from an oblique direction of 45 degrees. Since the frames 32a and 32b of the house structure 30a are formed in the same plane, the sliding function and the vertical load support function are the same in any direction in the horizontal plane at 360 degrees, and there is no directionality.

  The sliding bearing attached to the seismic isolation structure according to the above-described modification has been described with the configuration in which the lower sliding plate is attached to the foundation of the foundation, but even when the lower sliding plate is directly attached to the cloth foundation, the same as above An effect can be produced.

  FIG. 10 is an explanatory view showing a modified example of the sliding bearing. When the housing structure is a two-story building, the vertical axial force of the inner pillar increases. In such a case, the rod-shaped wooden base 20 to which the lower sliding plate 14 is attached may be arranged and supported in two rows in parallel with the portion directly below the column. In addition, instead of the base 20, the cloth foundations may be arranged in two rows in parallel. This allows the vertical axial force to be distributed on the two rows of foundations or cloth foundations.

  According to such a sliding bearing, the range in which the upper and lower plates slide relative to each other can be set with a minimum configuration consisting of a plate-like upper and lower sliding plates, and a wide range of seismic isolation with a simple structure that is easy to install. It becomes possible to demonstrate the function. Therefore, cost reduction can be achieved.

  If there is a gap when a horizontal member is placed on the fabric foundation or foundation due to construction errors, the position of the slide plate can be easily adjusted by adjusting the opening positions of the bolt holes on the upper or lower slide plate. be able to. Therefore, construction errors can be easily eliminated.

  In addition, since the upper sliding plate is attached along the longitudinal direction of the horizontal member and the lower sliding plate is attached along the longitudinal direction of the cloth foundation or foundation, an unexpected earthquake exceeding the set length of the sliding bearing occurred. If deformation occurs and the sliding range of the flat sliding surface of the upper and lower sliding plates is exceeded, the horizontal members and cloth foundations or foundations that intersect each other will replace the sliding bearing and the floor surface of the housing structure It is possible to prevent the housing structure from falling off. Further, since the sliding surface of the sliding bearing is formed in a flat shape, even if the housing structure falls from the lower sliding plate beyond the sliding range, there is little step and no impact is given to the structure.

It is a figure which shows the structure outline of the sliding bearing which concerns on embodiment of this invention. It is explanatory drawing of the upper slide board and lower slide board which concern on embodiment. It is composition explanatory drawing of the seismic isolation structure which concerns on embodiment. It is explanatory drawing attached to a base with a lower slide board. It is explanatory drawing which shows the attachment method of the horizontal member provided with the upper slide board. It is explanatory drawing which shows the attachment method of a sliding bearing. It is explanatory drawing which shows the modification of a lower slide board. It is explanatory drawing which shows the modification of the seismic isolation structure which concerns on embodiment. It is explanatory drawing of the fulcrum reaction force of a column axis and a sliding bearing. It is explanatory drawing which shows the modification of a sliding bearing. It is explanatory drawing of the foundation which concerns on embodiment. It is explanatory drawing of the seismic isolation apparatus using the conventional sliding bearing. It is a figure which shows the structure outline of the seismic isolation apparatus using the conventional rolling bearing.

Explanation of symbols

10 ......... Slide bearing, 12 ......... Upper sliding plate, 14 ......... Lower sliding plate, 16 ......... Horizontal material, 17 ......... Horizontal connecting material, 20 ......... Base, 22 ......... Installation Hole 24 ......... Temporary fastening hole 25 ......... Column shaft 26 ......... Column 27 ......... Anchor bolt 28 ......... Taper member 30 ... Housing structure 32 ......... Hard Material: 40 ......... Base, 50 ......... Seismic isolation structure, 100 ......... Dead house building, 102 ...... Basic slab, 103 ......... Slip bearing, 104 ...... Steel frame, 105 ... ... Lower sliding plate, 106 ......... Concrete base, 108 ......... Upper sliding plate, 109 ......... Restore rubber, 200 ......... Rolling support, 201 ...... Hard sphere, 202 ...... Tray, 203 ......... Oil damper, 204 ... Fixing device.

Claims (9)

A sliding bearing attached between the housing structure and the fabric foundation,
An upper sliding plate having a sliding surface attached downward along the longitudinal direction of the horizontal member of the housing structure;
A lower sliding plate provided with a sliding surface facing upward along the longitudinal direction of the fabric foundation;
A sliding bearing characterized in that the longitudinal direction of the horizontal member is placed in a direction intersecting with the longitudinal direction of the cloth foundation, and the sliding surfaces of the upper sliding plate and the lower sliding plate are slidable with respect to each other. A sliding bearing installed between the housing structure and the foundation,
An upper sliding plate having a sliding surface attached downward along the longitudinal direction of the horizontal member of the housing structure;
Installing a wooden base on the foundation, and comprising a lower sliding plate with an upward sliding surface attached along the longitudinal direction of the base;
A sliding bearing characterized in that the longitudinal direction of the horizontal member is placed in a direction crossing the longitudinal direction of the base, and the sliding surfaces of the upper sliding plate and the lower sliding plate are slidable with respect to each other.   3. The sliding bearing according to claim 1, wherein each of the upper sliding plate and the lower sliding plate has a U-shaped cross section and a sliding surface is formed in a flat shape.   4. The sliding bearing according to claim 3, wherein the upper sliding plate is attached by fitting a concave portion having a U-shaped cross section along the longitudinal direction of the horizontal member. Attach an upper sliding plate with a downward sliding surface along the longitudinal direction of the horizontal member of the house structure,
Attach a lower sliding plate with an upward sliding surface along the longitudinal direction of the foundation,
Place the longitudinal direction of the horizontal member in the direction intersecting the longitudinal direction of the foundation,
Adjust the mounting height of the upper sliding bearing or the lower sliding bearing formed in a U-shaped cross section,
A sliding support mounting method, wherein a sliding surface where the upper sliding plate and the lower sliding plate intersect is brought into close contact. A seismic isolation structure with a sliding bearing attached between the housing structure and the fabric foundation,
Arranging a plurality of rows of the fabric foundation,
A plurality of horizontal members of the housing structure are placed in the crossing direction of the cloth foundation rows,
An upper sliding plate with a sliding surface attached downward along the longitudinal direction of the horizontal member;
A lower sliding plate provided with a sliding surface facing upward along the longitudinal direction of the fabric foundation;
A seismic isolation structure, wherein the upper sliding plate and the lower sliding plate are attached so that the intersection of the upper sliding plate and the lower sliding plate coincides with a column axis of the housing structure. A seismic isolation structure with a sliding bearing attached between the housing structure and the fabric foundation,
Place the fabric foundation that is slightly smaller than the outer periphery of the house structure,
A plurality of horizontal members of the housing structure are crossed on the same plane and placed on the cloth foundation,
An upper sliding plate with a sliding surface attached downward along the longitudinal direction of the horizontal member;
A lower sliding plate provided with a sliding surface facing upward along the longitudinal direction of the fabric foundation;
A seismic isolation structure characterized in that an intersection of the upper sliding plate and the lower sliding plate is attached to an inner side of a column axis on an edge of the housing structure. A seismic isolation structure with a sliding bearing attached between the housing structure and the foundation,
Arranging a plurality of rows of wooden foundations installed on the foundation, and placing a plurality of horizontal members of the housing structure in the crossing direction of the rows of foundations,
An upper sliding plate with a sliding surface attached downward along the longitudinal direction of the horizontal member;
A lower sliding plate having an upward sliding surface attached along the longitudinal direction of the base,
A seismic isolation structure, wherein the upper sliding plate and the lower sliding plate are attached so that the intersection of the upper sliding plate and the lower sliding plate coincides with a column axis of the housing structure. A seismic isolation structure with a sliding bearing attached between the housing structure and the foundation,
Place a wooden base installed on the foundation that is slightly smaller than the outer periphery of the housing structure,
A plurality of horizontal members of the housing structure are crossed on the same plane and placed on the foundation,
An upper sliding plate with a sliding surface attached downward along the longitudinal direction of the horizontal member;
A lower sliding plate having an upward sliding surface attached along the longitudinal direction of the base,
A seismic isolation structure characterized in that an intersection of the upper sliding plate and the lower sliding plate is attached to an inner side of a column axis on an edge of the housing structure.

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