Slope structure

Abstract

To provide a slope structure to improve earthquake resistance.SOLUTION: Slope structure S0 is formed by connecting a first middle section 25, a second middle section 26, a first high-rise section 27, and a second high-rise section 28 as a plurality of inclined sections installed around the periphery of a building main body 11 across a plurality of floors of the building main body 11. The first middle section 25, the second middle section 26, the first high-rise section 27, and the second high-rise section 28 are supported on their farther sides from the building main body 11 by columns 41 to 52 placed on the lower foundation via seismic isolation devices, and on their closer sides from the building main body 11 by connection beams connected to columns 51 to 52 and to the building main body 11. Furthermore, the lower ends of the second high-rise section 28, the first high-rise section 27, and the second middle section 26 are connected to the adjacent first high-rise section 27, second middle section 26, and first middle section 25 directly below via expansion joints E1, E2, and E3, respectively.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a slope structure formed by connecting multiple inclined sections installed around the periphery of a building body across multiple floors of the building body. [Background technology]

[0002] Seismic isolation methods for buildings that place seismic isolation devices at the pile heads are being considered to prevent buildings from collapsing even in the event of a major earthquake (see, for example, Patent Document 1). In the seismic isolation method for existing structures described in Patent Document 1, the foundation beams are separated from the superstructure, which is the ground floor skeleton, at the level of the top surfaces of the existing foundation beams. Then, new floor beams for the lowest floor are installed at the bottom of the superstructure, and seismic isolation devices are interposed between the superstructure and the existing foundation beams. After that, if necessary, the entire superstructure is raised higher than before the renovation to ensure the floor height of the lowest floor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-13290 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, in the case of a large warehouse, a ramp structure with multiple inclined sections around the perimeter of the building may be used to guide transport vehicles (trucks) into the warehouse. If a non-seismic isolation ramp structure is installed on a seismically isolated building, there is a possibility that the ramp structure will collide with the building due to earthquake vibrations. Furthermore, if the ramp structure itself is long, there is a possibility that the components will collide with each other due to the different amplitudes of vibration caused by the vibrations of each pillar. [Means for solving the problem]

[0005] The slope structure that solves the above problem is a slope structure that is installed around the periphery of the building body at a height spanning multiple floors of the building body and is constructed by connecting multiple inclined sections, and the inclined sections are supported on the side farther from the building body by slope support columns placed on the lower foundation via seismic isolation devices, and on the side closer to the building body by connecting beams that connect the slope support columns to the building columns of the building body, and the lower ends of the inclined sections are connected to other adjacent inclined sections via expansion joints. [Effects of the Invention]

[0006] According to the present disclosure, the earthquake resistance of a slope structure can be improved. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view illustrating the configuration of a building equipped with a slope structure according to an embodiment. FIG. [Figure 2] FIG. 2 is a plan view of a main part of the slope structure of the embodiment. [Figure 3] FIG. 10 is a perspective view illustrating a column-beam structure of a main part of a slope structure in an embodiment. [Figure 4] FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. 2. [Figure 5] FIG. 2 is a front view of the first surface side of the main part of the slope structure of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of a slope structure will be described below with reference to Figures 1 to 5. Here, the slope structure will be described as being installed in a building with a seismic isolation structure. This slope structure is constructed by connecting multiple inclined sections in series.

[0009] (Outline of the building) As shown in FIG. 1, building 10 is, for example, a warehouse or the like, and includes a roughly rectangular parallelepiped, five-story building main body 11 and a slope structure S0. Slope structure S0 has two upper and lower slopes (S1, S2). The top floor of building main body 11 is the fifth floor F5, and openings A1 and A2 are formed on the fourth floor F4 and the second floor F2, respectively. Openings A1 and A2 are loading / unloading openings through which trucks traveling from the ground up the first slope S1 and the second slope S2 enter and exit the fourth floor F4 and the second floor F2 of building main body 11, respectively. These openings A1 and A2 are provided at one end (the left end in FIG. 1) of a first surface 11a of building main body 11.

[0010] The upper first slope S1 is L-shaped when viewed from above, surrounding the first surface 11a and the second surface 11b perpendicular to the first surface 11a of the building main body 11. This first slope S1 has a first straight section and a second straight section formed along the second surface 11b and the first surface 11a, respectively. The first straight section has a landing 25a where the second straight section joins and located at the corner of the first slope S1. Specifically, the first straight section is composed of a ground connecting path 21 located at the right end of the second surface 11b of the building main body 11, a sloping first low-rise sloping section 22, and a sloping second low-rise sloping section 23, all arranged in series.

[0011] The second straight section of the second slope S2 comprises a first middle section 25, a second middle section 26, a first high section 27, and a second high section 28 arranged in series. The first middle section 25, the second middle section 26, the first high section 27, and the second high section 28 function as inclined sections, and a slope section is formed by connecting the respective inclined sections. The lower end of the first middle section 25 has a landing 25a extending horizontally.

[0012] The second high-rise section 28, the first high-rise section 27, and the second middle-rise section 26 of the first slope S1 are connected to the adjacent first high-rise section 27, the second middle-rise section 26, and the first middle-rise section 25 below via expansion joints E1, E2, and E3, respectively. The first middle section 25 is also connected to the adjacent second low-rise inclined section 23 below via expansion joint E4.

[0013] The second higher section 28 has a fourth-floor connecting passage 28a. The fourth-floor connecting passage 28a is formed to pass through the opening A2, and is a path that guides trucks that have climbed the inclined portion of the first slope S1 from the outside of the building main body 11 to the inside of the fourth floor F4.

[0014] The second slope S2 on the lower level has a first straight section. This first straight section is located directly below the second straight section of the first slope S1. Specifically, the first straight section of the second slope S2 has a ground-level connecting path directly below the landing 25a and extends to the second-floor connecting path. This second-floor connecting path is located directly below the fourth-floor connecting path 28a of the first slope S1 and is formed to pass through the opening A2, and is a path that leads from the outside of the building main body 11 to the inside of the second floor F2.

[0015] (Structure of the pillars on the slope side of the main building 11) FIG. 2 is a plan view of the first surface 11a of the building 10 and the first slope S1 connected to this first surface 11a.

[0016] Fig. 3 is a perspective view showing the structure of piles, columns, and beams on the first surface 11a side. In this figure, the slope structure S0 and the floor slab of the building main body 11 are omitted. Fig. 4 is a cross-sectional view taken along line 4-4 in Fig. 2. Fig. 5 is a front view of the building 10 as seen from the first surface 11a side. In this figure, the ground below the ground surface G1 is omitted.

[0017] 2, a plurality of pillars C1, C2, C3, C4, C5, and C6 are provided in a straight line at intervals on the first surface 11a side of the building main body 11. Each of the pillars C1 to C6 functions as a building pillar that supports the building main body 11. 4, each of the columns C1 to C6 of the building main body 11 is provided on a lower foundation (pile cap or the like) P1a including the upper part (pile head) of the pile P1 via a seismic isolation device M1. The lower end of the lower foundation P1a is buried in the ground and protrudes above the ground surface G1 to form the first floor of the building main body 11.

[0018] Furthermore, laminated rubber bearings are used as the seismic isolation device M1. Columns C1 to C6 and a slab are provided on the seismic isolation device M1 via an upper foundation. As shown in FIG. 3, the pillars C1 are pillars arranged on both sides of the openings A1 and A2, and are entirely made of reinforced concrete (RC).

[0019] The columns C2 to C6 are entirely made of reinforced concrete, and steel frame members are embedded in the parts of the floors where the connecting beams of the slopes (S1, S2) connect. Specifically, the column C2r on the third floor F3 of the column C2 is made of steel-reinforced concrete (SRC). SRC is reinforced concrete with embedded steel members.

[0020] Column C3 is made of SRC, with column section C3r on the third floor F3 and first floor F1. Column C4 is made of SRC on the first floor F1. Column C5 is made of SRC on the second floor F2 and the first floor F1. As shown in Figure 4, the column C6 has a column portion C6r on the second floor F2 made of SRC. The column portion C6r on the second floor F2 has steel frame members SF6 embedded in reinforced concrete.

[0021] (Structure of the slope support columns on the first side) Next, the structure of the slope support columns on the first surface side will be described.

[0022] As shown in Figure 2, the slope structure S0 has columns 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, and 52 arranged in order at a distance from each other around the periphery of the building body 11. Each of the columns 41 to 52 functions as a slope support column. Here, the second higher section 28 has columns 41 and 42, the first higher section 27 has columns 43 and 44, the second middle section 26 has columns 45 to 47, and the first middle section 25 has columns 48 to 52.

[0023] The columns 41 to 50 are arranged in one-to-one correspondence with the columns C1 to C6 of the building main body 11. Furthermore, the column 51 is arranged on the diagonal line of the landing 25a with the column C6 located at the corner of the building main body 11. The column 52 is arranged in correspondence with the column C6 on the second surface 11b.

[0024] As shown in FIG. 3, the columns 41 to 52 are erected on lower foundations 31a, 32a, 33a, 33b, and 34a above the piles 31, 32, 33, and 34 via seismic isolation devices M1 (see FIGS. 4 and 5).

[0025] 3, in this embodiment, the lower foundation 31a on which the columns C1, 41, and 42 are erected is joined by the foundation beam 36 so that its planar shape is a square shape. Similarly, the lower foundation 32a on which the columns 43 and 44 and the corresponding column C2 are erected is joined by the foundation beam 37 so that its planar shape is a square shape.

[0026] Furthermore, the lower foundations 33a and 33b on which the columns 45 to 47 and their corresponding columns C2 and C3 are erected are joined by a foundation beam 38 so that their planar shape is a square shape (a shape formed by joining two square shapes).In addition, the lower foundation 34a on which the columns 48 to 52 and columns C4 to C6 are erected is also joined by a foundation beam 39.

[0027] (Structure of the beam connecting the slope support columns on the first side) As shown in Figure 3, beams b1 and b6 are fixed to the columns 41 and 42 of the second higher section 28. Beam b1 connects the upper ends of the columns 41 and 42 to form the first slope S1. Beam b6 is located directly below beam b1 and connects the lower ends of the columns 41 and 42 to form the second slope S2.

[0028] As shown in Figure 5, both ends of beam b2 are connected to the upper end of column 42 of second higher section 28 and the upper end of column 43 of the adjacent first higher section 27 via expansion joints E1 provided on the column 43 side. Furthermore, both ends of beam b7 are connected to the lower ends of columns 42 and 43. Beams b2 and b7 form first slope S1 and second slope S2, respectively.

[0029] Furthermore, both ends of beams b1 and b6 are connected to the upper and lower ends of adjacent columns 43 and 44 in the first higher section 27. Furthermore, reinforcing members 55 are provided between the columns 43 and 44 to connect them. These reinforcing members 55 include a vertical member R1, a horizontal member R2, and a diagonal member R3. The vertical member R1 extends vertically and connects the beams b1 and b6 at approximately their centers. The horizontal member R2 extends horizontally and connects the columns 43 and 44 at approximately their centers. The diagonal member R3 diagonally connects the intersections of the columns 43 and 44 with the beams b1 and b3 and the horizontal member R2.

[0030] Both ends of beam b2 are connected to the upper end of column 44 of the first higher floor 27 and the upper end of column 45 of the adjacent second middle floor 26 via expansion joints E2 provided on the column 43 side. Furthermore, both ends of beam b7 are connected to the lower ends of columns 44 and 45, respectively.

[0031] Both ends of the beam b1 are connected to the upper ends of the adjacent columns 45, 46, and 47 in the second middle floor 26. Furthermore, both ends of the beam b6 are connected to the lower ends of the columns 45, 46, and 47, respectively.

[0032] Furthermore, pillars 45, 46 are provided with reinforcing member 56 connecting them. Pillars 46, 47 are provided with reinforcing member 57 connecting them. Similar to reinforcing member 55, these reinforcing members 56, 57 include a vertical member R1, a horizontal member R2, and a diagonal member R3. Horizontal member R2 extends horizontally and connects approximately the center portions of pillars 45, 46 and pillars 46, 47, respectively. Diagonal member R3 diagonally connects the intersections of pillars 45, 46 (46, 47) with beams b1, b6 and horizontal member R2.

[0033] Both ends of beam b2 are connected to the upper end of column 47 of second intermediate floor 26 and the upper end of column 48 of adjacent first intermediate floor 25 via expansion joints E3 provided on the column 48 side. Furthermore, both ends of beam b7 are connected to the lower ends of columns 47, 48, respectively. As shown in FIG. 3, in the first intermediate story 25, both ends of beams b1 and b6 are connected to the upper and lower ends of adjacent columns 48, 49, 50, 51, and 52, respectively.

[0034] (Structure of connecting beam with slope structure on the first side) 2, the slope structure S0 includes beams 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, and 71. Each of the beams 61 to 71 functions as a connecting beam, connecting the columns C1 to C6 of the building main body 11 to the columns 41 to 50 facing each of the columns C1 to C6.

[0035] As shown in Figure 3, the ends of beams 61 and 62 on the building body 11 side are each fixed to the floor slab of the fourth floor F4 of the building body 11. The ends of beams 63 to 67 on the building body 11 side are each fixed to column portions C2r and C3r on the third floor F3 of the building body 11. The end of beam 68 on the building body 11 side is fixed to the floor slab of the third floor F3 of the building body 11. The ends of beams 69 to 71 on the building body 11 side are fixed to column portions C5r and C6r on the second floor F2 of the building body 11.

[0036] As shown in Fig. 2, beams b3 and b4 are provided on two adjacent columns of beams 62-70 at positions spaced apart from the building main body 11. Beam b3 faces beam b1 and connects the two adjacent columns. Beam b4 faces beam b2 and connects the two adjacent columns via expansion joints E1-E3.

[0037] 2, the center of beam b3, which is between adjacent beams 68 and 69, is located at the height of the floor slab of the third floor F3 of the building main body 11. Therefore, a horizontal reinforcing member R6 is placed between the beams 68 and 69. The horizontal reinforcing member R6 in this embodiment is configured in a Y-shape extending horizontally, and connects the floor slab of the third floor F3 of the building main body 11 to the intersection of the beams 68 and 69 and the beam b3.

[0038] Furthermore, beams 81-91 that form the second slope S2 are disposed directly below the beams 61-71 and overlap with the beams 61-71. Like the beams 61-71, the beams 81-91 connect the columns 41-51 to the building main body 11. Specifically, the ends of the beams 81-85 that face the building main body 11 are fixed to the floor slab of the second floor F2 of the building main body 11. The ends of the beams 86-89 that face the building main body 11 are fixed to the floor slab of the first floor F1 of the building main body 11. The ends of the beams 90-92 that face the building main body 11 are joined to the lower foundation P1a of the building main body 11. Furthermore, a beam (not shown) is provided directly below the beams b3 and b4 at a position that overlaps with the beam b3.

[0039] (Behavior during earthquakes) Next, the behavior of the building 10 having the slope structure S0 configured as described above during an earthquake will be described.

[0040] In the event of an earthquake, the seismic energy is absorbed by the seismic isolation devices M1 on the lower foundations P1a of the columns C1 to C6 of the building main body 11. In addition, the seismic energy is absorbed by the seismic isolation devices M1 on the lower foundations 31a, 32a, 33a, 33b, and 34a of the columns 41 to 52 of the slope structure S0.

[0041] The vibrations caused by the earthquake energy that cannot be absorbed by the seismic isolation device M1 are absorbed by the expansion joints E1 to E4 provided between the second high-rise section 28, the first high-rise section 27, the second middle-rise section 26 and the first middle-rise section 25. Therefore, in the slope structure S0, the adjacent second high-rise section 28, first high-rise section 27, second middle-rise section 26, and first middle-rise section 25 are prevented from colliding with each other with a large force.

[0042] (Action of this embodiment) The slope structure S0 comprises columns 41 to 52 installed on lower foundations 31a to 34a via seismic isolation devices M1. The columns 41 to 52 are connected to the building body 11 by beams 61 to 71. Furthermore, adjacent inclined sections (28 to 25) are connected by expansion joints E1 to E3, which absorbs the deviation of the swaying of each inclined section (28 to 25).

[0043] (Effects of this embodiment) (1) In this embodiment, the slope structure S0 is a seismic isolation structure, and therefore earthquake vibrations are absorbed by the seismic isolation device M1, making it possible to make the slope structure S0 less susceptible to vibration.

[0044] (2) In this embodiment, the second high-rise section 28, the first high-rise section 27, and the second middle-rise section 26 are connected to the adjacent lower sections, the first high-rise section 27, the second middle-rise section 26, and the first middle-rise section 25, via expansion joints E1, E2, and E3, respectively. This makes it possible to avoid collisions caused by differences in the magnitude of the swaying amplitude of the adjacent inclined sections (28-25).

[0045] (3) In this embodiment, the portions of the columns C2 to C6 of the building body 11 where the beams 61 to 71 (81 to 91) are connected are constructed with an SRC structure, which makes it possible to reinforce the supporting portion of the slope structure S0.

[0046] (4) In this embodiment, a reinforcing member 55 is provided to connect the columns 43, 44 of the first higher section 27. In addition, reinforcing members 56, 57 are provided to connect the columns 45, 46, 47 of the second middle section 26, respectively. This allows the configuration of the parts connected by the beam b1 in the first higher section 27 and the second middle section 26 (the configuration of the parts not connected by the expansion joints E1, E2) to sway as a unit.

[0047] (5) In this embodiment, adjacent columns 43, 44 provided with reinforcing member 55 are erected on lower foundations 32a connected by foundation beams 37, and adjacent columns 45-47 provided with reinforcing members 56, 57 are erected on lower foundations 33a connected by foundation beams 38. In this way, by connecting the lower foundations 32a-34a with each other by the foundation beams 37, 38, the configuration of the parts connected by beams b1 in the first higher section 27 and the second middle section 26 can be swayed more integrally.

[0048] (6) In this embodiment, the beams 68, 69 of the first intermediate floor 25, which correspond to the height of the floor slab of the third floor F3 of the building main body 11, are connected to the floor slab of the third floor F3 by horizontal reinforcement members R6. As a result, in the first intermediate floor 25, the beams 68, 69 are connected not only to the columns C4, C5 of the building main body 11 but also to the floor slab of the third floor F3, so that the first intermediate floor 25 can be firmly connected in the horizontal direction as well.

[0049] This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility. In the above embodiment, the beams b6 and b7 constituting the second slope S2 of the slope structure S0 connect the adjacent columns 41 to 52 without providing expansion joints. Alternatively, expansion joints may be provided. In this case, it is preferable to provide an expansion joint on the beam b7 located directly below the beam b2 connected via expansion joints E1 to E3, immediately before the beam b7 connects to the column connected below. Furthermore, the positions where the expansion joints are provided are not limited to the positions described above, and they may be arranged in accordance with the structure of the building main body 11.

[0050] The slope structure S0 in the above embodiment includes a first slope S1 on the upper level and a second slope S2 on the lower level. Alternatively, the slope structure may not include the second slope S2. In this case, the first slope S1 may be positioned at the same height as the second slope S2.

[0051] The slope structure S0 of the above embodiment is provided with horizontal reinforcing members R6 that connect the beams 68, 69 to the floor slab of the third floor F3. This is not limited to the floor slab of the third floor, but any connecting beam that is placed at the same height as the floor slab of the building main body 11 may be provided with horizontal reinforcing members that connect to the floor slab.

[0052] In the above embodiment, the first slope S1 at the upper level of the slope structure S0 is composed of four inclined sections (the second high-rise section 28, the first high-rise section 27, the second middle section 26, and the first middle section 25) connected via expansion joints E1 to E3. Depending on the size of the first slope S1, it may be composed of a smaller or larger number of inclined sections, rather than being limited to four inclined sections. In the above embodiment, a laminated rubber bearing is used as the seismic isolation device M1, but the present invention is not limited to this. For example, a sliding bearing, a rolling bearing, or the like may be used.

[0053] Next, the technical ideas that can be understood from the above-described embodiment and other examples will be described below. (a) The slope structure according to claim 2, characterized in that the reinforcing members extend horizontally and connect adjacent connecting beams to each other and to the floor slab of the building body. (b) A slope structure according to any one of claims 1 to 4 or (a), characterized in that a landing located at a position where different extending directions intersect is connected to the adjacent inclined portion directly below via an expansion joint. [Explanation of symbols]

[0054] A1,A2...opening, b1,b2,b3,b4,b6,b7...beams, C1,C2,C3,C4,C5,C6...pillars as building columns, E1,E2,E3,E4...expansion joints, F1...first floor, F2...second floor, F3...third floor, F4...fourth floor, G1...ground, M1...seismic isolation device, R1...vertical member, R2...horizontal member, R3...diagonal member, R6...horizontal reinforcement member, S0...slope structure, S1...first slope, S2...second slope, C2r,C3r,C5r,C6r...column part, P1,31,32,33,34...piles, P1a,31a,32a,33a,33b,34a...lower foundation, SF6...steel member, 10... Building, 11...main body of building, 11a...first side, 11b...second side, 21...starting point of loading, 22...first low-rise inclined section, 23...second low-rise inclined section, 25...first middle section, 25a...landing, 26...second middle section, 27...first high-rise section, 28...second high-rise section, 28a...access road, 36, 37, 38, 39...foundation beams, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52...columns as slope support columns, 55, 56, 57...reinforcing members, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91...beams as connecting beams.

Claims

1. A slope structure that is installed on the periphery of a building body at a height spanning multiple floors of the building body and is configured by connecting multiple inclined portions, The inclined portion is supported on the side farther from the building body by a slope support column placed on the lower foundation via a seismic isolation device, and on the side closer to the building body by a connecting beam connecting the slope support column to a building column of the building body, A slope structure characterized in that the lower end of the inclined portion is connected to another adjacent inclined portion via an expansion joint.

2. The inclined portion includes a plurality of the slope support columns, 2. The slope structure according to claim 1, wherein the slope portion further comprises a reinforcing member that connects adjacent slope support columns together at the slope portion for reinforcement.

3. 3. The slope structure according to claim 2, wherein the building columns have portions to which the connecting beams are connected that are made of steel-reinforced concrete.

4. A slope structure as described in any one of claims 1 to 3, characterized in that the inclined portions located at a height corresponding to the floor of the building body are connected to the floor by horizontal reinforcement members.

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