Skeleton structure of building

Abstract

To provide a skeleton structure of a building capable of enhancing the beauty of the building's appearance even when the floor height of the first floor part is higher than the floor height of other floors.SOLUTION: A skeleton structure 1 of a building having a plurality of floors includes: a plurality of first inclined columns 10 having equal length parallel to one another and extending inclining with respect to a vertical direction across the plurality of stories; a plurality of second inclined columns 20 having equal length parallel to one another, extending inclining with respect to the vertical direction on the opposite side of the first inclined columns 10 across the plurality of stories and arranged to form an oblique lattice with the plurality of first inclined columns 10; a plurality of beams 30 joined to the first inclined columns 10 and the second inclined columns 20 in corresponding floors; and a pedestal part 70 which is provided to protrude upward from a foundation beam 3 in the foundation part 4 of a building 1 and supports the bottom edge of a first inclined column 10 positioned at the bottom and the bottom edge of a second inclined column 20 positioned at the bottom.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a skeleton structure of a building having multiple floors. [Background technology]

[0002] For example, as the framework structure of a building with multiple floors, such as an office building or commercial building, a conventionally known structure has a plurality of first inclined columns that are inclined relative to the vertical direction and a plurality of second inclined columns that are inclined in the opposite direction to the first inclined columns relative to the vertical direction, with the plurality of first inclined columns and the plurality of second inclined columns arranged in a diagonal lattice pattern (see, for example, Patent Document 1).

[0003] With such a structural frame, the multiple first inclined columns and the multiple second inclined columns can function as columns that support vertical loads such as the weight of the building, while also functioning as braces that bear horizontal forces during earthquakes, etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-16543 Summary of the Invention [Problem to be solved by the invention]

[0005] In a skeleton structure in which a plurality of first inclined columns and a plurality of second inclined columns are arranged in a diagonal grid pattern, the joint between the lower end of the lowest first inclined column and the lower end of the lowest second inclined column is supported by the foundation of the building, while the other joints between the first inclined column and the second inclined column are joined to beams on the corresponding floors, thereby giving the skeleton structure a well-balanced appearance and enhancing the aesthetic appeal of the building.

[0006] However, in buildings where the height of the first floor is higher than that of the other floors, the first and second inclined columns located lowest will intersect above the foundation of the building (ground level). In order to match the height of this intersection with the height of the foundation of the building, the inclination angles of the first and second inclined columns located lowest must be smaller than the inclination angles of the other first and second inclined columns. This creates the problem of disrupting the balance of the main structure and diminishing the aesthetic appeal of the building.

[0007] The present invention was made in consideration of such problems, and its purpose is to provide a building frame structure that can enhance the aesthetic appearance of the building even if the floor height of the first floor is higher than the floor height of the other floors. [Means for solving the problem]

[0008] The building skeleton structure of the present invention is a skeleton structure for a building having multiple stories, comprising: a plurality of first inclined columns that are parallel to each other and of the same length and extend across the multiple stories at an angle to the vertical direction; a plurality of second inclined columns that are parallel to each other and of the same length and extend across the multiple stories at an angle to the opposite side of the first inclined columns with respect to the vertical direction, and are arranged in a diagonal lattice pattern together with the multiple first inclined columns; a plurality of beams joined to the first inclined columns and the second inclined columns on the corresponding stories; and pedestals that are provided in the foundation of the building and protrude upward from the foundation beams, and support the lower ends of the lowest-placed first inclined column and the lowest-placed second inclined column.

[0009] In the above-described configuration of the building frame structure of the present invention, it is preferable that the base portion has a steel frame supported on the foundation portion, a plate fixed to the upper end of the steel frame, and a concrete root wrapping portion covering the steel frame, and that the lower end of the first inclined column located lowest and the lower end of the second inclined column located lowest are joined to the plate.

[0010] In the above-mentioned configuration, the building skeleton structure of the present invention further comprises one third inclined column parallel to the first inclined column and longer than the first inclined column, and one fourth inclined column parallel to the second inclined column and longer than the second inclined column, and the first inclined column, the third inclined column, the fourth inclined column, and the second inclined columns are arranged in a diagonal grid pattern, with the lowest first inclined columns and the lowest second inclined columns being arranged between the third inclined column and the fourth inclined column, and the lower ends of the third inclined column and the fourth inclined column are preferably supported by sub-pedestals that protrude upward from the foundation beam to a height lower than that of the pedestal. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a building skeleton structure that can enhance the aesthetic appearance of the building even when the floor height of the first floor is higher than the floor height of the other floors. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a front view showing an outline of a building skeleton structure according to one embodiment of the present invention. [Figure 2] This is a floor plan of the third floor of the building structure shown in Figure 1. [Figure 3] FIG. 2 is a cross-sectional view showing details of the base portion shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, a building skeleton structure 1 according to one embodiment of the present invention will be described in detail with reference to the drawings.

[0014] A building skeleton structure 1 (hereinafter sometimes simply referred to as "skeleton structure 1") according to one embodiment of the present invention shown in Figures 1 and 2 is applied to a building 2 having multiple floors that can be used, for example, as an office building, commercial building, etc. In this embodiment, the building 2 has four floors, and the floor height of the first floor is higher than the floor heights of the other floors. Note that a detailed configuration of the building 2 will be omitted.

[0015] The skeleton structure 1 has a plurality of first inclined columns 10, a plurality of second inclined columns 20, and a plurality of beams 30.

[0016] The first inclined column 10 and the second inclined column 20 can be made of, but are not limited to, circular steel pipes, square steel pipes, or concrete-filled steel pipes. The beam 30 can be made of, but is not limited to, H-shaped steel.

[0017] In this embodiment, the skeleton structure 1 has seven first inclined columns 10, seven second inclined columns 20, and 27 beams 30 in the outermost portion 1A on the front side of the building 2 shown in Fig. 1. The seven first inclined columns 10 and seven second inclined columns 20 are arranged in a diagonal lattice pattern in the outermost portion 1A of the building 2 when viewed from the front.

[0018] In this embodiment, the skeleton structure 1 further comprises, in the outermost portion 1A on the front side of the building 2 shown in Fig. 1, one third inclined column 11 that is parallel to and longer than the first inclined column 10, and one fourth inclined column 21 that is parallel to and longer than the second inclined column 20. The lowest-placed first inclined columns 10 and the lowest-placed second inclined columns 20 are arranged between the third inclined column 11 and the fourth inclined column 21, and the third inclined column 11 and the fourth inclined column 21 are arranged together with the first inclined columns 10 and the second inclined columns 20 in a diagonal lattice pattern.

[0019] The exterior wall on the front side of the building 2 is formed from a transparent plate material such as glass, and the multiple first inclined columns 10 and multiple second inclined columns 20 arranged in the outermost part 1A can be configured to be visible from outside the building 2.

[0020] In addition, like the outermost portion 1A on the front side of the building 2, the skeleton structure 1 also has a plurality of first inclined columns 10, a plurality of second inclined columns 20, and a plurality of beams 30 in the outermost portion 1B on the back side of the building 2 and the outermost portions 1C on both side sides, and these portions 1B and 1C also have a configuration in which the plurality of first inclined columns 10 and the plurality of second inclined columns 20 are arranged in a diagonal lattice pattern. However, since the configurations of these portions 1B and 1C are basically the same as those of the outermost portion 1A on the front side of the building 2, only the configuration of the outermost portion 1A on the front side of the building 2 will be described below.

[0021] The first inclined columns 10 are each inclined relative to the vertical direction and extend across multiple floors. The first inclined columns 10 are all parallel to one another and have the same length.

[0022] In this embodiment, the seven first inclined columns 10 are each inclined to the right with respect to the vertical direction (the up-down direction on the page) in Fig. 1, and three of the seven first inclined columns 10 extend across two stories, the first and second stories, of the building 2, while the other four first inclined columns 10 extend across two stories, the third and fourth stories, of the building 2. The three first inclined columns 10 extending across the two stories, the first and second stories, of the building 2 and the three first inclined columns 10 extending across the two stories, the third and fourth stories, of the building 2 are arranged in a substantially straight line with corresponding first inclined columns 10. Furthermore, of the four first inclined columns 10 extending across the two floors, the third and fourth floors, of building 2, the first inclined column 10 on the far left in Figure 1 is arranged in approximately a straight line with the third inclined column 11 extending across the two floors, the first and second floors, of building 2.

[0023] The multiple second inclined columns 20 extend across multiple floors, each inclined in the opposite direction to the first inclined columns 10 with respect to the vertical direction. The multiple second inclined columns 20 are all parallel to each other and have the same length.

[0024] In this embodiment, the seven second inclined columns 20 are each inclined to the left with respect to the vertical direction (the up-down direction on the paper) in Fig. 1, and three of the seven second inclined columns 20 extend across two stories, the first and second stories, of the building 2, while the other four second inclined columns 20 extend across two stories, the third and fourth stories, of the building 2. The three second inclined columns 20 extending across the two stories, the first and second stories, of the building 2 and the three second inclined columns 20 extending across the two stories, the third and fourth stories, of the building 2 are arranged in a substantially straight line with corresponding columns. In addition, of the four second inclined columns 20 extending across the two floors, the third and fourth floors, of building 2, the second inclined column 20 on the far right in Figure 1 is arranged in approximately a straight line with the fourth inclined column 21 extending across the two floors, the first and second floors, of building 2.

[0025] Of the three second inclined columns 20 extending across the two stories, the first and second stories, of the building 2, the upper ends of two second inclined columns 20 are joined at joints 40 to the upper ends of corresponding first inclined columns 10 of the three first inclined columns 10 extending across the two stories, the first and second stories, of the building 2. In addition, the lower ends of the four second inclined columns 20 extending across the two stories, the third and fourth stories, of the building 2 are joined at joints 40 to the lower ends of corresponding first inclined columns 10 of the four first inclined columns 10 extending across the two stories, the third and fourth stories, of the building 2.

[0026] Of the three first inclined columns 10 extending across the two floors, the first and second floors, of the building 2, the upper end of the first inclined column 10 on the far right in FIG. 1 is joined at a joint 40 to the upper end of a fourth inclined column 21 extending across the two floors, the first and second floors, of the building 2. Furthermore, of the three second inclined columns 20 extending across the two floors, the first and second floors, of the building 2, the upper end of the second inclined column 20 on the far left in FIG. 1 is joined at a joint 40 to the upper end of a third inclined column 11 extending across the two floors, the first and second floors, of the building 2.

[0027] Of the four first inclined columns 10 extending across the two floors, the third and fourth floors, of building 2, in Figure 1, the upper ends of the three first inclined columns 10 from the left are each joined at joints 50 to the upper ends of the corresponding second inclined columns 20 among the three second inclined columns 20 from the right.

[0028] As described above, the multiple first inclined columns 10 are parallel to each other and of the same length, and the multiple second inclined columns 20 are also parallel to each other and of the same length, so the diagonal lattice shape formed by the multiple first inclined columns 10 and the multiple second inclined columns 20 is a combination of diamonds of the same shape and size.

[0029] The beams 30 are joined to the first inclined columns 10 and the second inclined columns 20 on the corresponding stories.

[0030] In this embodiment, five beams 30 supporting the floor slab of the third floor of the building 2 are joined at their ends to a joint 40 at which the ends of two of the first inclined columns 10 are joined to the ends of two of the second inclined columns 20, a joint 40 at which the end of the first inclined column 10 is joined to the end of the fourth inclined column 21, and a joint 40 at which the end of the second inclined column 20 is joined to the end of the third inclined column 11. More specifically, the beams 30 arranged between a pair of joints 40 have one end joined to one joint 40 and the other end joined to the other joint 40, bridging the pair of joints 40. In addition, the beams 30 located on the left and right sides in Figure 1 are joined at one end to joints 40, i.e., the first inclined column 10 and the fourth inclined column 21, or the second inclined column 20 and the third inclined column 11, and are cantilevered by the first inclined column 10 and the fourth inclined column 21, or the second inclined column 20 and the third inclined column 11.

[0031] Furthermore, nine beams 30 supporting the floor slab of the second floor of the building 2 and nine beams 30 supporting the floor slab of the fourth floor of the building 2 are joined at their ends to an intermediate portion 10a between one end and the other end of the first inclined column 10, an intermediate portion 20a between one end and the other end of the second inclined column 20, an intermediate portion 11a between one end and the other end of the third inclined column 11, or an intermediate portion 21a between one end and the other end of the fourth inclined column 21. More specifically, the beams 30 arranged between the first inclined column 10 and the second inclined column 20 have one end joined to the intermediate portion 10a, 20a of either the first inclined column 10 or the second inclined column 20 and the other end joined to the intermediate portion 10a, 20a of either the first inclined column 10 or the second inclined column 20, thereby bridging between the first inclined column 10 and the second inclined column 20. In addition, the beams 30 located on the left and rightmost sides in Figure 1 are each joined at one end to the middle part 11a of the third inclined column 11 to the middle part 21a of the fourth inclined column 21, and are cantilevered by the third inclined column 11 to the fourth inclined column 21.

[0032] The four beams 30 supporting the rooftop of the building 2 are each joined at their ends to a joint 50 where a first inclined column 10 and a second inclined column 20 are joined. More specifically, the beam 30 arranged between a pair of joints 50 has one end joined to one of the joints 50 and the other end joined to the other joint 50, spanning the pair of joints 50. The beams 30 arranged on the extreme left and right sides in FIG. 1 are each joined at one end to a joint 50, and the other end is joined to a joint 60 where the upper ends of the first inclined column 10 to the second inclined column 20 arranged on the extreme left and right sides in FIG. 1 are joined.

[0033] A pedestal (base) 70 is provided on the foundation portion 4 that constitutes the foundation beam 3 of the building 2. The pedestal 70 protrudes upward from the foundation beam 3 that constitutes the foundation portion 4 of the building 2, and the lower ends of the first inclined column 10, which is located at the lowest, and the lower ends of the second inclined column 20, which is located at the lowest, are supported by the pedestal 70. The protruding height of the pedestal 70 from the foundation beam 3 corresponds to the difference between the floor height of the first floor (the distance between the foundation beam 3 and the lowest beam 30 in Figure 1) and the floor height of the other floors (the distance between the vertically adjacent beams 30 in Figure 1).

[0034] In this embodiment, three pedestals 70 are provided on the foundation 4, aligned at intervals in the left-right direction in Fig. 1, corresponding to the three first inclined columns 10 and three second inclined columns 20 extending across the two stories, the first and second stories, of the building 2. The lower ends of the three first inclined columns 10 and the three second inclined columns 20 extending across the two stories, the first and second stories, of the building 2 are supported by the corresponding pedestals 70, respectively. That is, the lower ends of the first inclined pillar 10 and the second inclined pillar 20 on the rightmost side in Fig. 1 are supported by being joined to the rightmost pedestal 70 in Fig. 1, the lower ends of the first inclined pillar 10 and the second inclined pillar 20 on the leftmost side in Fig. 1 are supported by being joined to the leftmost pedestal 70 in Fig. 1, and the lower ends of the first inclined pillar 10 and the second inclined pillar 20 in the center in Fig. 1 are supported by being joined to the center pedestal 70 in Fig. 1. In this way, of the multiple first inclined pillars 10 and second inclined pillars 20 arranged in a diagonal lattice pattern, the lower ends of the first inclined pillar 10 and the second inclined pillar 20 arranged lowest are joined to each other at the pedestal 70.

[0035] The lower ends of the third inclined column 11 and the fourth inclined column 21 can each be supported by a sub-pedestal 80 provided on the foundation part 4. In this embodiment, the protruding height of the sub-pedestal 80 from the foundation beam 3 is lower than the protruding height of the pedestal 70 from the foundation beam 3. The protruding height of the sub-pedestal 80 from the foundation beam 3 may be lower or higher than the protruding height of the pedestal 70 from the foundation beam 3, depending on the lengths of the third inclined column 11 and the fourth inclined column 21. The configuration of the sub-pedestal 80 other than the protruding height may be the same as or different from the configuration of the pedestal 70 described below.

[0036] As shown in Figure 3, in this embodiment, the base portion 70 has a steel frame 71, a finishing material 72, and a root wrapping portion 73, and is configured so that the lower end of the first inclined column 10 located at the lowest position and the lower end of the second inclined column 20 located at the lowest position are joined to the steel frame 71.

[0037] The steel frame 71 is formed by bundling together, for example, a number of square steel pipes, and is placed on the floor 3 of the foundation part 4 with its openings facing up and down. Steel plate base plates 74 are fixed to the upper and lower ends of the steel frame 71, and the base plate 74 fixed to the lower end is fixed to the foundation part 4 with a number of anchor bolts 75, so that the steel frame 71 is supported by the foundation part 4.

[0038] The finishing material 72 fills the gap between the upper end of the root wrapping portion 73 and the base plate 74 located at the upper end of the steel frame 71.

[0039] The root wrapping portion 73 is made of concrete and covers the periphery of the steel frame 71. The root wrapping portion 73 may be formed by fixing the steel frame 71 to the foundation portion 4 and then pouring concrete around the steel frame 71.

[0040] The root wrapping portion 73 may be made of reinforced concrete with reinforcing bars arranged inside. In addition, to improve the adhesion of the root wrapping portion 73 to the steel frame 71, a configuration may be adopted in which multiple studs 76 are fixed to the outer circumferential surface of the steel frame 71. For convenience, only one stud 76 is labeled in Figure 3.

[0041] In the base 70, the lower ends of the first inclined column 10 and the second inclined column 20 are joined to the steel frame 71 of the base 70 using joint members 90. The joint members 90 have a first column connection part 91 that is fixed by welding or the like to the upper surface of a base plate 74 that is fixed to the upper end of the steel frame 71 and forms part of the first inclined column 10, and a second column connection part 92 that is fixed to the upper surface of the base plate 74 and forms part of the second inclined column 20.

[0042] In addition, the base portion 70 is provided on the foundation portion 4 that constitutes the foundation beam 3 of the building 2, protruding upward from the foundation beam 3, and can support the lower end of the first inclined column 10 located lowest and the lower end of the second inclined column 20 located lowest, and is not limited to the above configuration and may be configured in other ways.

[0043] In the building skeleton structure 1 according to this embodiment having the above configuration, the multiple first inclined columns 10 and the multiple second inclined columns 20 are inclined in opposite directions relative to the vertical direction and are arranged in a diagonal lattice pattern, so that the multiple first inclined columns 10 and the multiple second inclined columns 20 can function as columns that support vertical loads such as the weight of the building 2, while also functioning as braces that bear horizontal forces during an earthquake, etc. This makes it possible to increase the earthquake resistance of the building 2 with a simpler configuration than when columns are configured to extend vertically and braces are provided between the columns and beams.

[0044] In the building skeleton structure 1 according to this embodiment having the above-mentioned configuration, the foundation portion 4 constituting the foundation beams 3 of the building 2 is provided with a pedestal 70 that protrudes upward from the foundation beams 3 and supports the lower end of the lowest located first inclined column 10 and the lower end of the lowest located second inclined column 20. Therefore, even in a building 2 in which the height of the first floor is higher than the height of the other floors, the lowest located first inclined column 10 and second inclined column 20 can be supported on the foundation portion 4 via the pedestal 70 while maintaining the same inclination angle as the other first inclined columns 10 and second inclined columns 20. In this way, the plurality of first inclined columns 10 and second inclined columns 20 are arranged in a diagonal lattice pattern, giving the skeleton structure 1 a well-balanced appearance. That is, in a building 2 in which the height of the first floor is higher than that of the other floors, by installing a base portion 70 that connects the intersection point and the foundation portion 4 at the point where the lower end of the first inclined column 10 located lowest and the lower end of the second inclined column 20 intersect, the multiple first inclined columns 10 and second inclined columns 20 are arranged in a diagonal grid pattern, giving the main structure 1 a well-balanced appearance.

[0045] Therefore, according to the building skeleton structure 1 of this embodiment, even if the floor height of the first floor is higher than the floor height of the other floors, the skeleton structure 1 can have a well-balanced appearance, thereby enhancing the aesthetic appearance of the building 2.

[0046] Furthermore, in the building frame structure 1 according to this embodiment, the base 70 has a steel frame 71 supported by the foundation 4 and a concrete root wrapping portion 73 that covers the steel frame 71, and the lower end of the lowest-placed first inclined column 10 and the lower end of the lowest-placed second inclined column 20 are joined to the steel frame 71. This ensures that the first inclined column 10 and the second inclined column 20 are reliably supported by the base 70, and the protruding height of the base 70 from the foundation beam 3 can be easily set to the required height depending on the floor height of the first floor of the building 2.

[0047] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention.

[0048] For example, in the above embodiment, the multiple first inclined columns 10 and the multiple second inclined columns 20 are configured to extend across two floors of the building 2, but this is not limited to this and they may also be configured to extend across three or more floors of the building 2.

[0049] Furthermore, the numbers of the first inclined columns 10, the second inclined columns 20, and the beams 30 that make up the skeleton structure 1 can be changed as appropriate depending on the number of floors, size, etc. of the building 2.

[0050] Furthermore, the configuration of the joint member 90 that joins the lower end of the first inclined pillar 10 and the lower end of the second inclined pillar 20 to the base portion 70 is not limited to the above, and can be modified in various ways. [Explanation of symbols]

[0051] 1 Framework structure 1A part 1B part 1C part 2. Building 3 Foundation beam 4 Basic part 10 First Inclined Pillar 10a Middle 11 Third Sloping Pillar 11a Middle part 20 Second Inclined Pillar 20a Middle 21 Fourth Sloping Pillar 21a Middle part 30 Beam 40 Joint 50 Joint 60 Joint 70 Base 71 Steel Frame 72 Finishing Materials 73 Root wrapping section 74 PCB 75 anchor bolt 76 studs 80 Base 90 Joint members 91 First Pillar Connection 92 Second Pillar Connection

Claims

1. A skeleton structure of a building having multiple floors, a plurality of first inclined columns that are parallel to each other and have the same length and extend across the plurality of stories at an angle relative to the vertical direction; a plurality of second inclined columns that are parallel to each other and have the same length, are inclined in the opposite direction to the first inclined columns with respect to the vertical direction and extend across the plurality of stories, and are arranged in a diagonal lattice pattern together with the plurality of first inclined columns; a plurality of beams joined to the first inclined columns and the second inclined columns in the corresponding stories; a base portion provided at the foundation portion of the building, protruding upward from the foundation beam, and supporting the lower end of the lowest-placed first inclined column and the lower end of the lowest-placed second inclined column.

2. The base portion is A steel frame supported on the foundation portion; A concrete root wrapping portion that covers the steel frame, 2. The building skeleton structure according to claim 1, wherein the lower ends of the first inclined column and the second inclined column are joined to the steel frame.

3. a third inclined pillar parallel to the first inclined pillar and longer than the first inclined pillar; a fourth inclined pillar parallel to the second inclined pillar and longer than the second inclined pillar; the first inclined pillars, the second inclined pillars, the third inclined pillars, and the fourth inclined pillars are arranged in a diagonal lattice pattern, and the lowermost first inclined pillars and the lowermost second inclined pillars are arranged between the third inclined pillars and the fourth inclined pillars; 3. The building structure according to claim 1, wherein the third inclined column and the fourth inclined column are supported at their lower ends by a sub-base portion whose protruding height from the foundation beam is lower than that of the base portion.

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