Installation structure of seismic isolation sliding bearings

Abstract

The present invention provides an installation structure for seismic isolation sliding bearings that allows for easy installation, maintenance, and inspection of the lower concrete base portion, as well as the ability to jack up the upper concrete base portion, thereby facilitating the replacement of worn sliding materials. [Solution] The seismic isolation sliding bearing 61 is installed so as to be sandwiched between the upper and lower concrete base portions 41a and 42a. On the upper surface portion 41u of the lower concrete base portion 41a to which the sliding plate 62 is fixed, a jack installation space 66 is provided on the outer circumference of the sliding plate fixing area 65 to which the sliding plate 62 is fixed. On the lower surface portion 42d of the upper concrete base portion 42a to which the sliding member 63 is fixed, a working notch portion 64 is formed, cut out at a predetermined notch height from the outer peripheral side of the upper concrete base portion 42a toward the sliding member 63 side.

Description

【Technical Field】 【0001】 The present invention relates to an installation structure of a seismic isolation sliding bearing, and particularly relates to an installation structure of a seismic isolation sliding bearing adopted in a seismic isolation operating part formed including a lower concrete pedestal part, an upper concrete pedestal part, and a seismic isolation sliding bearing sandwiched between these pedestal parts. 【Background Art】 【0002】 In Japan where earthquakes frequently occur, for example, for medium-rise to high-rise buildings, it is desired to make the buildings have a seismic isolation function. For example, in hybrid buildings made of wood and RC, mid-rise seismic isolation buildings with a seismic isolation function added to the wooden hybrid structure have also been developed (see, for example, Non-Patent Document 1 and Non-Patent Document 2). In the seismic isolation buildings with the wooden hybrid structure described in Non-Patent Document 1 and Non-Patent Document 2, it is difficult to give the wooden part a seismic isolation function, so preferably, base isolation is adopted. Base isolation is, for example, in a reinforced concrete underground pit that forms the building's foundation part integrally with foundation piles, from the foundation base provided protruding upward with a plurality of lower concrete pedestal parts, and from the reinforced concrete slab part that is the base part of the building transmitting the building's load to the foundation base, provided protruding downward with a plurality of upper concrete pedestal parts, each of which is attached by sandwiching a seismic isolation device, and by making possible the lateral relative movement of the building with respect to the foundation base through the seismic isolation device, for example, a seismic isolation function can be given to a building with a wooden hybrid structure. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2024-48794 【Non-Patent Documents】 【0004】 【Non-Patent Document 1】 S Yoshihiro Sasaki, et al., 'Technical Report: Mid-rise Apartment Building Using Wood Hybrid Structure - Anesis Chayagasaka -', [online], April 2021, GBRC Journal Vol. 46 No. 2, [Retrieved September 26, 2024], Internet<URL:https: / / www.gbrc.or.jp / assets / documents / gbrc / GBRC184_889.pdf> [Non-Patent Document 2] Fumiki Nakamura, et al., 'Technical Report: Nagato City Hall - Aiming to be a Model Project for Large-Scale Layered Wooden Structures -', [online], July 2020, GBRC Journal Vol. 45 No. 3, [Retrieved September 27, 2024], Internet<URL:https: / / www.gbrc.or.jp / assets / documents / gbrc / GBRC181_873.pdf> [Overview of the project] [Problems that the invention aims to solve] 【0005】 On the other hand, the applicant has newly developed a seismically isolated high-rise building, for example in Japanese Patent Application No. 2024-199462 filed on the same date, which includes a lower floor consisting of multiple floors preferably made of reinforced concrete and an upper floor consisting of multiple floors made of a wooden hybrid structure, with an intermediate seismic isolation layer interposed between the lower and upper floors of the lower floor. 【0006】 In the seismically isolated high-rise building described in Japanese Patent Application No. 2024-199462, for example, in the lower floor of a reinforced concrete structure, a seismic isolation operating unit is preferably distributed at multiple locations in the intermediate seismic isolation layer, comprising a lower concrete base portion that protrudes upward as a whole from the ceiling slab of the lower floor, an upper concrete base portion that protrudes downward as a whole from the floor slab of the upper floor, and a seismic isolation device that is installed so as to be sandwiched between these concrete base portions. 【0007】 Furthermore, since the seismic isolation device installed in the seismic isolation operating section is required to suppress the shaking of upper floors and upper levels caused by earthquakes, it may be configured to include a seismic isolation sliding bearing in order to effectively suppress the transmission of horizontal forces caused by earthquakes to upper floors and upper levels (see, for example, Patent Document 1). The seismic isolation sliding bearing is a member that supports vertical loads and is fixed to the upper and lower concrete bases, respectively. It transmits vertical loads between the sliding member and the sliding plate, and by reducing the coefficient of friction between the sliding member and the sliding plate, it facilitates the sliding member from sliding on the surface of the sliding plate, thereby suppressing the transmission of horizontal loads caused by earthquakes to upper floors and upper levels. Also, since the seismic isolation sliding bearing basically consists of a sliding member and a sliding plate, it is designed to be low in height due to its simple shape. For this reason, if the distance between the upper and lower concrete bases is matched to the height of the seismic isolation sliding bearing, as with other seismic isolation devices, it becomes impossible to secure space for, for example, attaching and detaching bolts during inspection work, maintenance, and replacement work. Furthermore, in particular, with seismic isolation sliding bearings, each time they slide during an earthquake, the sliding members and the low-friction material layer, such as a sheet of polytetrafluoroethylene resin placed on the surface of the sliding members, wear down. Therefore, in addition to replacing the seismic isolation device itself, it becomes necessary to replace the sliding members and the low-friction material layer, which necessitates jacking up the device more than other types of seismic isolation devices. 【0008】 However, in the seismic isolation sliding bearing described in Patent Document 1, the lower concrete base portion, which is the seismic isolation foundation, is formed to be larger than the upper concrete base portion, and the work of installing the seismic isolation sliding bearing using bolts, etc., can be easily carried out on the outer circumference of the lower concrete base portion that protrudes to the outside of the upper concrete base portion. However, with the seismic isolation sliding bearing described in Patent Document 1, it is difficult to install jacks between the upper and lower concrete base portions, and a large jacking device is used that extends from the ceiling slab of the lower floor to the floor slab of the upper floor, which requires a lot of effort to install the jacking device, and the entire load supported by the upper concrete base portion is borne by the area in which the upper end of the jacking device makes contact with the floor slab of the upper floor, which is likely to cause deformation or damage to the floor slab. 【0009】 The present invention aims to provide an installation structure for seismic isolation sliding bearings that allows for easy installation of seismic isolation sliding bearings on the outer periphery of the lower concrete base and easy maintenance and inspection of low-height seismic isolation sliding bearings, while also enabling the upper concrete base to be jacked up, thereby facilitating the replacement of worn sliding members and low-friction material layers. [Means for solving the problem] 【0010】 The present invention relates to an installation structure for a seismic isolation sliding support used in a seismic isolation operating unit formed by including a lower concrete base portion, an upper concrete base portion, and a seismic isolation sliding support that is installed sandwiched between these upper and lower concrete base portions, wherein the seismic isolation sliding support is configured such that a sliding plate is fixed to either the upper surface portion of the lower concrete base portion of the seismic isolation operating unit or the lower surface portion of the upper concrete base portion of the seismic isolation operating unit, and a sliding member is fixed to either the upper surface portion of the lower concrete base portion to which the sliding plate is fixed, Alternatively, the above objective is achieved by providing an installation structure for a seismic isolation sliding bearing, wherein a jack installation space is provided on the lower surface of the upper concrete base portion in the outer periphery of the sliding plate fixing area where the sliding plate is fixed, and a working notch is formed on the lower surface of the upper concrete base portion where the sliding member is fixed, or on the upper surface of the lower concrete base portion, in a portion corresponding to the jack installation space on the outer periphery of the sliding member fixing area where the sliding member is fixed, with a predetermined notch height cut out from the outer periphery side of these base portions toward the sliding member. 【0011】 Furthermore, in the installation structure of the seismic isolation sliding bearing of the present invention, it is preferable that the working notch is formed continuously around the entire circumference in the circumferential direction on the outer periphery of the sliding member fixing area. 【0012】 Furthermore, in the installation structure of the seismic isolation sliding bearing of the present invention, it is preferable that the lower concrete base portion and the upper concrete base portion have similar cross-sectional shapes in portions other than those in which the working notch portion is formed. 【0013】 Furthermore, in the installation structure of the seismic isolation sliding bearing of the present invention, it is preferable that the working notch portion is cut out with a notch height of 100 to 300 mm. 【0014】 Furthermore, in the installation structure of the seismic isolation sliding bearing of the present invention, it is preferable that the seismic isolation sliding bearing is an elastic sliding bearing in which the sliding member is formed by including laminated rubber. 【0015】 Furthermore, the installation structure of the seismic isolation sliding bearing of the present invention is preferably such that the seismic isolation operating part is provided in a seismic isolation layer that constitutes a multi-story building and exhibits seismic isolation function during an earthquake, with the lower concrete base portion projecting upward as a single unit from the floor slab of the seismic isolation layer, and the upper concrete base portion projecting downward as a single unit from the ceiling slab of the seismic isolation layer. [Effects of the Invention] 【0016】 According to the seismic isolation sliding bearing installation structure of the present invention, the installation of the seismic isolation sliding bearing and maintenance and inspection work on low-height seismic isolation sliding bearings can be easily performed on the outer circumference of the lower concrete base, and the upper concrete base can be jacked up, making it easy to replace worn sliding material and low-friction material layers. [Brief explanation of the drawing] 【0017】 [Figure 1] This is a broken perspective view showing a high-rise building with its exterior walls removed, illustrating a seismic isolation sliding bearing installation structure according to a preferred embodiment of the present invention. [Figure 2]A cross-sectional view taken along the line A-A of FIG. 5, which illustrates a seismic isolation high-rise building employing the installation structure of a seismic isolation sliding bearing according to a preferred embodiment of the present invention. [Figure 3] A cross-sectional view taken along the line B-B of FIG. 5, which illustrates a seismic isolation high-rise building employing the installation structure of a seismic isolation sliding bearing according to a preferred embodiment of the present invention. [Figure 4] A cross-sectional view taken along the line C-C of FIG. 2, which illustrates a seismic isolation high-rise building employing the installation structure of a seismic isolation sliding bearing according to a preferred embodiment of the present invention. [Figure 5] A cross-sectional view taken along the line D-D of FIG. 2, which illustrates a seismic isolation high-rise building employing the installation structure of a seismic isolation sliding bearing according to a preferred embodiment of the present invention. [Figure 6] A cross-sectional view taken along the line E-E of FIG. 2, which illustrates a seismic isolation high-rise building employing the installation structure of a seismic isolation sliding bearing according to a preferred embodiment of the present invention. [Figure 7] An enlarged view of portion F of FIG. 2, which illustrates a seismic isolation slit provided in an intermediate floor concrete wall. [Figure 8] (a) is an enlarged view of portion G of FIG. 2, which illustrates the installation structure of a seismic isolation sliding bearing according to a preferred embodiment of the present invention, and (b) is an enlarged view of portion H of (a). [Figure 9] (a) is a cross-sectional view taken along the line I-I of FIG. 8(a), and (b) is a cross-sectional view taken along the line J-J of FIG. 8(a). 【Embodiments for Carrying Out the Invention】 【0018】 A preferred embodiment of the seismic isolation sliding bearing installation structure 60 (see Figure 8(a)) of the present invention is, for example, as shown in Figures 1 and 2, preferably in a building 10 (hereinafter also referred to as a "seismic isolation high-rise building") which has a multi-story section consisting of multiple floors, and is used as a structure for installing a seismic isolation sliding bearing 61 (see Figure 8(a)) as a seismic isolation device 47 in the seismic isolation operating section 43 of a seismic isolation layer 40 that exhibits a seismic isolation function during an earthquake. In this embodiment, the seismic isolation high-rise building 10 preferably includes a lower floor 20 consisting of, for example, two floors made of reinforced concrete, and an upper floor 30 consisting of, for example, six floors made of a wooden hybrid structure, and the seismic isolation layer 40 is interposed between the lower floor 21 and the upper floor 22 in the lower floor 20. The seismic isolation sliding bearing installation structure 60 of this embodiment is designed to provide space for periodic inspection of the seismic isolation sliding bearing 61, which is installed sandwiched between a concrete base portion 41a that protrudes upward from a floor slab 41 constituting the seismic isolation layer 40 and a concrete base portion 42a that protrudes downward from a ceiling slab 42 constituting the seismic isolation layer 40, and to allow for easy replacement of worn sliding members 63 and low-friction material layers. 【0019】 Furthermore, the seismic isolation sliding bearing installation structure 60 of this embodiment is an installation structure used in a seismic isolation operating unit 43 formed by including a lower concrete base portion 41a, an upper concrete base portion 42a, and a seismic isolation sliding bearing 61 that is installed sandwiched between these upper and lower concrete base portions 41a and 42a, as shown in Figures 8(a) and 9(a). The seismic isolation sliding bearing 61 is configured such that a sliding plate 62 is fixed to either the upper surface portion 41u of the lower concrete base portion 41a or the lower surface portion 42d of the upper concrete base portion 42a of the seismic isolation operating unit 43, preferably on the upper surface portion 41u of the lower concrete base portion 41a, and a sliding member 63 is fixed to either the upper surface portion 41u of the lower concrete base portion 42a or the lower surface portion 42d of the upper concrete base portion 42a. Furthermore, on the upper surface 41u of the lower concrete base portion 41a where the sliding plate 62 is fixed, preferably a jack installation space 66 is provided continuously around the entire circumference in the outer periphery of the sliding plate fixing area 65 where the sliding plate 62 is fixed, and on the lower surface 42d of the upper concrete base portion 42a where the sliding member 63 is fixed, preferably a working notch 64 is formed in the portion corresponding to the jack installation space 66 on the outer periphery of the sliding member fixing area 67 where the sliding member 63 is fixed, preferably cut out at a predetermined notch height from the outer periphery side surface of the upper concrete base portion 42a toward the sliding member 63. 【0020】 Furthermore, in this embodiment, the working notch 64 is preferably formed continuously around the entire circumference in the circumferential direction on the outer periphery of the sliding member fixing area 67 (see Figure 9(a)). 【0021】 Furthermore, in this embodiment, preferably, the seismic isolation operating unit 43 is provided in a seismic isolation layer 40 that provides seismic isolation during an earthquake, which constitutes a multi-story building 10 with multiple floors, as shown in Figures 1 to 3. The lower concrete base portion 41a of the seismic isolation layer 40 is integrally projected upward from the floor slab 41 of the seismic isolation layer 40, and the upper concrete base portion 42a is integrally projected downward from the ceiling slab 42 of the seismic isolation layer. 【0022】 In this embodiment, the seismically isolated high-rise building 10 is constructed, for example, as an employee dormitory, as shown in Figures 1 to 6. Preferably, the first floor 21, which is the lowest floor of the lower floor 20, which has two floors of reinforced concrete structure, is formed as a public space mainly equipped with a dining hall, bath, garbage disposal area, etc. Preferably, the second floor 22 of the lower floor 20, which is sandwiched between the intermediate seismic isolation layer 40, and the third to eighth floors above the lower floor 20, which are, for example, a wooden hybrid structure, are formed as living spaces equipped with multiple private rooms for each employee. In this embodiment, the intermediate seismic isolation layer 40 that provides seismic isolation is formed as a dedicated seismically isolated space that is not normally accessed by residents, in the area between the first floor 21, which is formed as a public space, and the second floor 22, which is formed as a living space, in the lower floor 20, which has a reinforced concrete structure. 【0023】 Furthermore, in this embodiment, the intermediate floor seismic isolation layer 40 has a configuration similar to that of an intermediate floor seismic isolation layer provided in a building with a hybrid floor portion as described in, for example, Japanese Patent Application No. 2024-199462, and is preferably interposed between the first floor 21, which is the lowest floor, and the second floor 22, which is the top floor, of the lower floor 20, which is a reinforced concrete structure (see Figures 2 and 3). The intermediate floor seismic isolation layer 40 is composed of a ceiling slab 41 of the first floor 21, which is also the floor slab of the seismic isolation layer 40, a floor slab 42 of the second floor 22, which is also the ceiling slab of the seismic isolation layer 40, and a plurality of seismic isolation operating parts 43 interposed between the ceiling slab 41 of the first floor 21 and the floor slab 42 of the second floor 22, supporting the ceiling slab 41 so that it can move laterally relative to the floor slab 42. As shown in Figure 4, the multiple seismic isolation actuation units 43 are distributed throughout the seismic isolation layer 40, which makes it possible to support the ceiling slab 41 from the floor slab 42 in a stable manner and allow for relative lateral movement by the multiple seismic isolation actuation units 43. 【0024】 Furthermore, in this embodiment, the intermediate floor concrete wall 45 of the intermediate floor seismic isolation layer 40, including the outer perimeter wall 45a, which is erected between the floor slab 41 of the seismic isolation layer 40 and the ceiling slab 42 of the seismic isolation layer 40, is formed in a state where it is divided vertically by seismic isolation slits 46, without supporting loads from above via the ceiling slab 41, as shown in Figures 2 and 7. The seismic isolation slits 46 are formed by providing slit-shaped gaps, preferably with a spacing of about 50 mm, at predetermined height positions in the intermediate portion of the intermediate floor concrete wall 45, traversing the intermediate floor concrete wall 45 throughout the entire intermediate floor seismic isolation layer 40. As shown in Figure 7, for example, in the outer perimeter wall 45a, the gaps formed by the seismic isolation slits 46 can be filled with a gap-filling material 46a, preferably such as rock wool or fire-resistant joint material, and a trim material 46b, for example made of aluminum, can be attached to cover the gaps formed by the seismic isolation slits 46 from the outside. This makes it possible to prevent wind, rain, and other elements from entering the building through the gaps created by the seismic isolation slits 46. 【0025】 In this embodiment, each of the multiple seismic isolation operating units 43 distributed in the seismic isolation layer 40 consists of multiple upper concrete base portions 42a protruding downward from the floor slab 42 of the second floor 22, multiple lower concrete base portions 41a protruding upward from the ceiling slab 41 of the first floor 21, and a known seismic isolation device 47, such as a high-damping rubber laminated bearing, elastic sliding bearing, or linear rolling bearing, which is mounted so as to be sandwiched between these upper and lower base portions 41a and 42a. Of these distributed multiple seismic isolation operating units 43, for multiple locations where a seismic isolation sliding bearing 61 is used as the seismic isolation device 47, the seismic isolation sliding bearing 61 is installed via the seismic isolation sliding bearing installation structure 60 of this embodiment, as shown in Figures 8(a), (b) and 9(a), (b). 【0026】 In the seismic isolation sliding bearing 61, as described above, in the seismic isolation operating section 43 to which the seismic isolation sliding bearing 61 is attached, the sliding plate 62 is fixed to either the upper surface 41u of the lower concrete base portion or the lower surface 42d of the upper concrete base portion, preferably the upper surface 41u of the lower concrete base portion 41a, and the sliding member 63 is fixed to either the upper surface 41d of the upper concrete base portion 42a. In the event of an earthquake, the sliding member 63 slides on the upper surface of the sliding plate 62 with almost no friction, thereby transmitting the vertical load while allowing horizontal displacement and preventing damage to the building 10. 【0027】 In this embodiment, as shown in Figure 9(b), a stainless steel plate with a roughly rectangular planar shape, for example, with the four corners beveled, is used as the sliding plate 62. Furthermore, since the sliding plate 62 needs to be larger than the operating range in which the sliding member 63 moves during an earthquake, it preferably has a rectangular planar shape with dimensions of approximately 1570 mm in length and width. 【0028】 Furthermore, in this embodiment, as shown in Figures 8(b) and 9(b), a rectangular sliding plate fixing steel plate 62a, having vertical and horizontal dimensions similar to those of the sliding plate 62, is integrally joined to the lower surface of the sliding plate 62, opposite to the upper surface on which the sliding member 63 slides, by means of known adhesive means, for example. The sliding plate fixing steel plate 62a joined to the sliding plate 62 is provided with two bolt fastening holes 62b at positions corresponding to the four cut-out corners of the sliding plate 62. 【0029】 Furthermore, in this embodiment, as shown in Figures 8(a) and 9(b), a base mounting plate 62c is embedded and fixed in the lower concrete base portion 41a along the upper surface portion 41u using a fixing anchor 62d, for fixing the sliding plate 62 to the upper surface portion 41u via the sliding plate fixing steel plate 62a. The fixing anchor 62d has a bag-shaped nut portion with a female screw hole in the portion embedded in the lower concrete base portion 41a. By fastening a bolt member screwed from above through the bolt fastening hole 62b of the sliding plate fixing steel plate 62a to the bag-shaped nut portion of the fixing anchor 62d, the sliding plate 62 can be firmly fixed to the upper surface portion 41u of the lower concrete base. 【0030】 In this embodiment, the sliding member 63, which constitutes the seismic isolation sliding support 61 together with the sliding plate 62, is fixed to the lower surface 42d of the upper concrete base portion 42a, facing the upper surface 41u of the lower concrete base portion 41a to which the sliding plate 62 is fixed, as shown in Figures 8(a), (b), and 9(a). The sliding member 63 includes a sliding material 63a, preferably made of a low-friction material such as fluororesin, positioned at the lowest end so as to enable sliding on the upper surface of the sliding plate 62 with almost no friction; a holding member 63b that can stably hold the sliding material 63a at the lower end of the sliding member 63 so as to enable vertical loads from above to be transmitted to the sliding plate 62 via the sliding material 63a; and a sliding member fixing part 63c that fixes the sliding material 63a together with the holding member 63b to the lower surface 42d of the upper concrete base portion 42a. 【0031】 In this embodiment, the sliding material 63a has a rectangular planar shape, preferably with dimensions of approximately 370 mm in length and width, which is considerably smaller than the sliding plate 62, so that it can slide freely along the upper surface of the sliding plate 62 within a predetermined range of motion during an earthquake (see Figure 9(b)). 【0032】 The retaining member 63b is preferably a rectangular parallelepiped-shaped laminated rubber. This makes the seismic isolation sliding bearing 61 an elastic sliding bearing, preferably in which the sliding member 63 is formed by including laminated rubber. The retaining member 63b made of laminated rubber is able to suppress the transmission of horizontal loads caused by earthquakes to upper floors and upper levels, even in earthquakes with small tremors, because the laminated rubber deforms horizontally before the sliding material 63a begins to slide on the surface of the sliding plate 62. A known joining jig for joining the sliding material 63a is integrally attached to the lower end of the retaining member 63b, and the sliding material 63a is joined via this joining jig and positioned at the lowest end of the sliding member 63. In addition, a sliding member fixing part 63c is integrally attached to the upper end of the retaining member 63b, opposite to the lower end to which the sliding material 63a is joined. 【0033】 As shown in Figures 8(a) and 8(b), the sliding member fixing portion 63c is integrally attached to the holding member 63b by, for example, welding a steel plate having a rectangular planar shape with dimensions larger in length and width than the cross-sectional shape of the holding member 63b to the upper end of the holding member 63b opposite to the lower end to which the sliding material 63a is joined. Furthermore, because the planar shape of the sliding member fixing portion 63c is larger than the cross-sectional shape of the holding member 63b, it has an overhanging flange portion that extends outward from the upper end of the holding member 63b. The sliding member fixing portion 63c has a rectangular planar shape with dimensions of, for example, 600 mm in length and width (see Figure 9(a)). Multiple bolt fastening holes 63d are formed in the protruding flange portion of the sliding member fixing portion 63c, and the sliding member fixing portion 63c is fixed to a base mounting plate 63e, which will be described later, embedded and fixed along the lower surface portion 42d of the upper concrete base portion 42a, by male bolt members fastened to the bolt fastening holes 63d. 【0034】 As shown in Figures 8(a) and 9(a), a base mounting plate 63e is embedded and fixed in the lower surface 42d of the upper concrete base 42a using anchoring anchors 63f, so as to follow the lower surface 42d, for fixing the sliding member 63 to the lower surface 42d via the sliding member fixing part 63c. The anchoring anchor 63f has a bag-shaped nut portion with a female screw hole in the portion embedded in the upper concrete base 42a. By fastening a bolt member screwed from above through the bolt fastening hole 63d of the protruding flange portion of the sliding member fixing part 63c to the bag-shaped nut portion of the anchoring anchor 63f, the sliding member 63 can be firmly fixed to the lower surface 42d of the upper concrete base 42a. 【0035】 Furthermore, in the seismic isolation sliding bearing installation structure 60 of this embodiment, a jack installation space 66 is preferably continuously provided around the entire circumference in the circumferential direction on the upper surface 41u of the lower concrete base portion 41a where the sliding plate 62 is fixed, and a working notch 64 is preferably cut out at a predetermined notch height from the outer peripheral side surface of the upper concrete base portion 42a toward the sliding member 63, in the portion corresponding to the jack installation space 66 in the outer peripheral portion of the sliding member fixing area 67 where the sliding member 63 is fixed. 【0036】 In this embodiment, the work notch 64 can be cut to a height of 100 to 300 mm, for example, to facilitate the installation of the seismic isolation sliding bearing 61 and the maintenance and inspection of the seismic isolation sliding bearing 61, and to facilitate the installation of a jack between the upper surface 41u of the lower concrete base portion 41a and the lower surface 42d of the upper concrete base portion 42a when replacing worn sliding members or low friction material layers. 【0037】 As a result, according to the installation structure 60 of this embodiment for the seismic isolation sliding bearing 61, it becomes possible to easily perform the work of installing the seismic isolation sliding bearing 61 and the maintenance and inspection work of the seismic isolation sliding bearing 61 on the outer circumference of the lower concrete base portion 41a, which is the lower concrete base portion. Furthermore, it becomes possible to jack up the upper concrete base portion 42a, which is the upper concrete base portion, using a simple jack configuration installed between the lower concrete base portion 41a and the upper concrete base portion 42a via a work notch 64, thereby making it possible to easily replace worn sliding members and low friction material layers. 【0038】 Furthermore, in this embodiment, the work notch 64 is preferably formed continuously around the entire circumference in the circumferential direction on the outer periphery of the sliding member fixing area 67, making it easy to inspect the entire outer circumference of the seismic isolation sliding bearing 61. 【0039】 Furthermore, in this embodiment, preferably, the lower concrete base portion 41a and the upper concrete base portion 42a have similar cross-sectional shapes in the portions other than the portion in which the working notch portion 64 is formed. Therefore, it becomes possible to install a jack between the upper and lower concrete bases 41 and 42a at any position on the outer periphery of the sliding plate fixing area 65. 【0040】 Furthermore, the present invention is not limited to the above embodiments and can be modified in various ways. For example, the working notch does not necessarily have to be formed continuously around the entire circumference in the circumferential direction on the outer periphery of the sliding member fixing area, and can be formed by cutting out only the necessary parts in the circumferential direction. The seismic isolation operating part does not necessarily have to be a seismic isolation layer that provides seismic isolation during an earthquake, which constitutes a multi-story building, in which the lower concrete base portion protrudes upward as a single unit from the floor slab of the seismic isolation layer and the upper concrete base portion protrudes downward as a single unit from the ceiling slab of the seismic isolation layer, with a seismic isolation sliding bearing attached between them. [Explanation of Symbols] 【0041】 10. Seismic isolation high-rise buildings 20 lower level 21 Lower floor (1st floor) 21a Floor slab of floor 21 on the first floor 21b Through opening 21c spacing 22 Upper floor (2nd floor) 22a Main floor area 22b Overhanging floor section 22c Corridor 22d, 22e Partition wall 23 Ceiling slab 25 private rooms 30 Upper layer 31a 3rd floor 31b 4th floor 32a Corridor 32b Partition wall 33 private rooms 35 Elevator shaft 40. Seismic isolation layer (intermediate floor seismic isolation layer) 41. Floor slabs that constitute the seismic isolation layer (ceiling slabs of the lower floor) 41a Lower concrete base 41b Through opening 41c spacing 41u Upper surface of the lower concrete base (upper surface) 42. Ceiling slab (floor slab of the upper floor) that constitutes the seismic isolation layer 42a Upper concrete base 42d Lower part of the upper concrete base (bottom part) 42s outer peripheral surface part 43 Seismic isolation mechanism 44 Ceiling beams 45 Intermediate floor concrete wall 45a outer wall 46 Seismic isolation slits 46a Gap filler 46b Trim 47 Seismic isolation device 47a Seismic isolation sliding bearing 48 Floor beam 49 Damper device 50 Concrete core section 51 Ceiling slab 52 Floor slab 53 Wooden pillar 54a wooden beam 54b Concrete beam 55 Staircase 56. Wooden seismic walls 57 Support slab 60 Installation structure of seismic isolation sliding bearings 61 Seismic isolation sliding bearing 62 slides 62a Steel plate for fixing sliding plate 62b Bolt fastening hole 62c Base mounting plate 62d anchoring anchor 63 Sliding member 63a Lubricant 63b Retaining member 63c Sliding member fixing part 63d Bolt fastening hole 63e Base mounting plate 63f anchoring anchor 64 Working notch 65 Slide plate fixing area 66 Jack installation space 67. Sliding member fixing area

Claims

[Claim 1] An installation structure for a seismic isolation sliding bearing, which is used in a seismic isolation operating unit formed by including a lower concrete base, an upper concrete base, and a seismic isolation sliding bearing that is installed so as to be sandwiched between these upper and lower concrete bases, The aforementioned seismic isolation sliding bearing is configured such that a sliding plate is fixed to either the upper surface of the lower concrete base of the seismic isolation operating unit or the lower surface of the upper concrete base of the seismic isolation operating unit, and a sliding member is fixed to either the upper or lower surface. Furthermore, a jack installation space is provided on the outer periphery of the sliding plate fixing area where the sliding plate is fixed, on the upper surface of the lower concrete base portion to which the sliding plate is fixed, or on the lower surface of the upper concrete base portion. An installation structure for a seismic isolation sliding bearing, wherein the lower surface of the upper concrete base portion to which the sliding member is fixed, or the upper surface of the lower concrete base portion, has a working notch formed in the portion of the outer circumference of the sliding member fixing area to which the sliding member is fixed, corresponding to the jack installation space, and cut out at a predetermined notch height from the outer peripheral side of these base portions toward the sliding member. [Claim 2] The installation structure for a seismic isolation sliding bearing according to claim 1, wherein the work notch is formed continuously around the entire circumference in the circumferential direction on the outer periphery of the sliding member fixing area. [Claim 3] The seismic isolation sliding bearing installation structure according to claim 1 or 2, wherein the lower concrete base portion and the upper concrete base portion have similar cross-sectional shapes in portions other than the portion in which the working notch is formed. [Claim 4] The installation structure for a seismic isolation sliding bearing according to claim 1 or 2, wherein the work notch is cut out with a notch height of 100 to 300 mm. [Claim 5] The seismic isolation sliding bearing installation structure according to claim 1 or 2, wherein the seismic isolation sliding bearing is an elastic sliding bearing in which the sliding member is formed by including laminated rubber. [Claim 6] The seismic isolation operating part is provided in a seismic isolation layer that provides seismic isolation functionality during an earthquake, which constitutes a multi-story building, with the lower concrete base portion projecting upward as a single unit from the floor slab of the seismic isolation layer, and the upper concrete base portion projecting downward as a single unit from the ceiling slab of the seismic isolation layer, according to the installation structure for a seismic isolation sliding bearing according to claim 1 or 2.

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