Frame structure and structure equipped with frame structure

Abstract

To provide a frame structure capable of forming corners of a frame structure easily and a structure with the frame structure.SOLUTION: Each layer of a structure comprises a beam structure 2 formed by beams 21 combined in the circumferential direction, a plurality of first slant columns 3 arranged in parallel at a prescribed interval in a horizontal direction in the same vertical plane with the beam 21 and slant in the same direction to the beam 21 and a plurality of second slant columns 4 arranged in parallel at the prescribed interval in the horizontal direction in the same vertical plane with the beam 21 and the first slant columns 3 and slant in the symmetrical direction in front view of the slant direction of the first slant columns 3 to the beam 21, and the beam 21, the first slant column 3 and the second slant column 4 are joined at the intersections respectively, the adjacent first slant columns 3, 3 and the adjacent second slant columns 4, 4 form a frame grid 5 in a slant lattice type in front view and the beam structure 2 has an outer shape in a substantially rectangular shape in plane view in which an inside part 21a and an outside part 21b of a corner 11 in plane view is bent in a circular arc shape.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a frame structure and a structure equipped with the frame structure. [Background technology]

[0002] Ultra-high rise structures and ultra-high rise seismic isolation structures that are over 300m tall require high horizontal rigidity to ensure the safety of the structure during earthquakes and storms, but it is difficult to ensure this horizontal rigidity with the rigid frame structures used in general structures.One rational frame structure that can ensure this horizontal rigidity is one in which the framework around the periphery of the structure is combined in a diagonal lattice shape without using vertical columns. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-127820 A Summary of the Invention [Problem to be solved by the invention]

[0004] On the other hand, a problem when using the above-mentioned oblique lattice-shaped frame structure is the manufacturing and assembly method of the joint between the beam members. Patent Document 1 describes a structure of a rectangular frame structure in plan view that ensures horizontal rigidity and is easy to process, in which the corner columns are divided into end columns of the X-plane and Y-plane, and the end columns are connected to each other by a connecting beam. However, if the above-mentioned oblique lattice-shaped frame structure used in an ultra-high-rise (seismic isolation) structure has a general rectangular outer shape in plan view, the joint of the oblique lattice-shaped beams at the corners of the frame structure will have an extremely complicated shape. Therefore, problems arise when manufacturing and assembling the members of the frame structure, such as manufacturing the beams that form the corners, assembling the corners of the frame structure, and transporting the beams.

[0005] The present invention has been made in consideration of the above circumstances, and has an object to provide a frame structure in which corners of the frame structure can be easily formed, and a structure equipped with the frame structure. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, a frame structure according to the present invention comprises, in each story of a structure, a beam structure formed by combining beams in the circumferential direction, a plurality of first diagonal columns arranged in parallel at a predetermined interval in the horizontal direction in the same vertical plane as the beams and inclined in the same direction relative to the beams, and a plurality of second diagonal columns arranged in parallel at a predetermined interval in the horizontal direction in the same vertical plane as the beams and the first diagonal columns and inclined in a direction symmetrical to the inclination direction of the first diagonal columns in a front view, wherein the beams, the first diagonal columns and the second diagonal columns are respectively joined at intersections, and adjacent first diagonal columns and adjacent second diagonal columns form a frame grid having an external shape of a diagonal lattice type when viewed from the front, and the beam structure has an external shape of a rectangle when viewed from above, with inner and outer parts of the corners curved in an arc shape when viewed from above.

[0007] With the above configuration, by making the corners of the frame structure arc-shaped in plan view, all joints between beams in the grid structure with a diagonal lattice shape when viewed from the front become X-shaped intersections in plan view. Therefore, a grid structure with a diagonal lattice shape in front view can be easily formed even in the corners of the frame structure. In addition, since the number of components that form the corners of the frame structure can be reduced, the difficulty of joining components in the corners of the frame structure can be made approximately the same as that of the general parts (flat parts) of the frame structure. In addition, due to the planar arc shape of the corners, when the axial force acting on the frame structure is transmitted to the corners, the acting direction is approximately on the same plane, so that it is possible to suppress a force (thrust force) that tends to spread the frame structure in the outer circumferential direction, which is generated when the acting direction of the axial force changes at the corners. Therefore, it is possible to mitigate the occurrence of local stress at the corners of the frame structure and suppress damage to the frame structure. In addition, the frame structure can handle local stress without requiring the installation of reinforcing members or the like to resist local stress at the corners.

[0008] Furthermore, in the structural frame according to the present invention, the corners of the structure may be tangent to the beams forming the corners in a planar view and have an outer shape in a planar view that generally corresponds to the arc shape in a planar view of the outer periphery of a virtual cylinder whose axis is oriented in the vertical direction, and the structural frame grid formed at the corners may be formed along the outer periphery of the virtual cylinder.

[0009] With the above configuration, the corners of the frame structure are formed as arc shapes along a virtual cylinder in plan view, so that the desired grid structure of a diagonal lattice type in front view can be easily formed in the corners of the frame structure. In addition, since the grid structure of a diagonal lattice type in front view can be formed in plan view in the corners of the frame structure, a frame structure with high mechanical rationality can be formed in which the occurrence of local stress such as thrust force caused by the transmission of load to the corners is mitigated.

[0010] Furthermore, in the structural frame according to the present invention, the corners of the structure are formed at an incline and have an outer shape in a plan view that generally corresponds to the arc shape in a plan view of the outer periphery of a truncated cone-shaped virtual pillar that is tangent to the beam forming the corner in a plan view and has an axis that is inclined in the inclination direction of the corner, and the structural frame grid formed at the corner may be formed along the outer periphery of the virtual pillar.

[0011] With the above configuration, by forming the corners of the frame structure as a circular arc shape in a plan view along the virtual column of a truncated cone shape, a desired grid structure of a diagonal lattice type in a front view that takes into account the inclination of the corners of the frame structure can be easily formed. Also, since a grid structure of a diagonal lattice type in a front view that takes into account the inclination of the corners of the frame structure can be formed in a plan view, a frame structure with high mechanical rationality can be formed in which the occurrence of local stress such as thrust force caused by the transmission of load to the corners is mitigated.

[0012] Moreover, a structure equipped with a frame structure according to the present invention is provided with a frame structure on the outer periphery of a high-rise structure.

[0013] The above-described configuration makes it possible to easily form corners and construct a structure equipped with a structural frame structure that has the desired horizontal rigidity against directional external forces such as earthquakes and wind forces and is structurally and mechanically rational. Effect of the Invention

[0014] According to the present invention, it is possible to provide a frame structure that allows corners of the frame structure to be easily formed, and a structure including the frame structure. [Brief description of the drawings]

[0015] [Figure 1] 1A is a perspective view illustrating an example of a frame structure according to an embodiment of the present invention, and FIG. 1B is a plan view illustrating a method of forming a corner of the frame structure. [Diagram 2] FIG. 1 is a perspective view showing an example of a frame structure according to an embodiment of the present invention. [Diagram 3] FIG. 4 is an explanatory diagram illustrating the direction in which an axial force acts at a corner in an example of a frame structure according to an embodiment of the present invention. [Figure 4] 1A is a perspective view illustrating a modified example of the frame structure according to the embodiment of the present invention, and FIG. 1B is a perspective view illustrating the modified example of the frame structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, a frame structure and a structure including the frame structure according to an embodiment of the present invention will be described with reference to Figs. 1 to 4.

[0017] The frame structure 1 according to this embodiment is provided on the outer periphery of a structure (not shown) having a high-rise superstructure (hereinafter, referred to as a "high-rise structure"). The high-rise structure to which the frame structure 1 is applied is an ultra-high-rise building or a high-rise seismically isolated building having a height of more than 300 m. As shown in Fig. 1(a), one horizontal direction of the frame structure 1 is the X direction, the other horizontal direction perpendicular to the X direction is the Y direction, and the direction perpendicular to the X and Y directions is the Z direction. The X and Y directions are the circumferential directions of the high-rise structure, and the Z direction is the height direction of the high-rise structure.

[0018] The frame structure 1 includes a beam structure 2 in which rectangular structures 22, each formed by combining beams 21 in the X and Y directions to have a rectangular shape in plan view, are arranged at regular intervals in the Z direction. In this embodiment, the arrangement intervals of the rectangular structures 22 in the Z direction are the height of each floor of the high-rise structure. Note that, depending on the frame plan of the high-rise structure, the arrangement is not limited to the above configuration, and for example, the rectangular structures 22 may be arranged on the periphery of the middle part of the first floor.

[0019] In the frame structure 1, a first diagonal column 3 inclined at an angle A from the Z direction with respect to a beam 21 and a second diagonal column 4 inclined in a direction symmetrical to the first diagonal column 3 when viewed from the front with respect to the beam 21 are provided between rectangular structures 22 arranged at regular intervals in the Z direction. The first diagonal column 3 and the second diagonal column 4 are arranged in parallel at a predetermined interval in the X direction or the Y direction, respectively, and are provided around the entire periphery of the side surface of the beam structure 2. The first diagonal column 3 and the second diagonal column 4 are each provided by joining and extending a plurality of beams in the installation direction.

[0020] The beam 21 is a known H-shaped steel. The first diagonal column 3 and the second diagonal column 4 are box columns made of known steel materials. However, the above configuration is not limited depending on various conditions such as the strength required for the frame structure 1. For example, the beam 21 may be an I-shaped steel, and the first diagonal column 3 and the second diagonal column 4 may be reinforced concrete columns.

[0021] The beam 21, the first diagonal column 3, and the second diagonal column 4 are joined at their respective intersections. In this embodiment, the types of beams joined at each joint are not uniform, and for example, there is a configuration in which all three types of beams are joined at one joint, and there is also a configuration in which any two types of beams out of the three types are joined.

[0022] At the outer periphery of the frame structure 1, first diagonal columns 3, 3 adjacent to each other in the X or Y direction and second diagonal columns 4, 4 adjacent to each other in the same direction and in the same vertical plane are joined at each intersection to form a frame grid 5 having an external shape of a diagonal lattice when viewed from the front.

[0023] 1(a) and (b), a virtual cylinder 6 is assumed to be disposed inside the frame structure 1 and adjacent to a corner 11 of the frame structure 1. The virtual cylinder 6 is disposed with its axis oriented in the Z direction. The virtual cylinder 6 has an outer periphery 61 that contacts at virtual contact points 62, 62 with inner portions 21a, 21a of beams 21, 21 extending to the corner portion 11 from the X direction and the Y direction.

[0024] The beams 21, 21 extending from the X direction and the Y direction to the corner 11 are formed into an R-shape (arc shape) in plan view that approximately matches the outer shape of the outer periphery 61 of the imaginary cylinder 6 in plan view between the imaginary contact points 62, 62 at the corner 11, and are joined to form an arc corner 12. The inner portion 21a and the outer portion 21b of the beam 21 that constitutes the arc corner 12 both have an outer shape that is an arc shape in plan view.

[0025] In addition, the structural grid 5 located between virtual tangents 63, 63 extending in the Z direction from the virtual contact points 62, 62 is formed as an arc structural grid 51 having an outer shape that is R-shaped (arc-shaped) in a planar view along the outer periphery 61 of the virtual cylinder 6.

[0026] The first diagonal columns 3 forming the frame grid 5 and the first diagonal columns 3 forming the arc frame grid 51 are provided continuously. The same applies to the second diagonal columns 4 forming the frame grid 5 and the arc frame grid 51. In addition, with the above configuration, the frame grid 5 and the arc frame grid 51 formed across the general portion (portions along the X-direction and Y-direction of the frame structure 1) and the imaginary tangents 63, 63 (arc corner portion 12) are also formed continuously, so that the frame grid 5 and the arc frame grid 51 have an external shape of a diagonal lattice type when viewed from the front.

[0027] By providing a configuration in which arc corners 12 and arc frame grids 51 are formed along the virtual cylinder 6 assumed at the above-mentioned corners 11 at four corners 11 of the frame structure 1, a frame structure 1 that is approximately rectangular in plan view and has corners 11 with a geometric R shape (arc shape) as shown in Figure 2 is obtained.

[0028] The virtual cylinder 6 is assumed during the design and material production stages of the frame structure 1, and determines the external shape of the arc corner portion 12 and the arc frame grid 51, but is not actually provided on site, etc.

[0029] In this embodiment, the arc corner 12 is formed by joining the beams 21, 21 extending from the X direction and the Y direction to the corner 11, but the configuration is not limited to this embodiment as long as the desired arc corner 12 and frame structure 1 are formed. For example, the arc corner 12 may be provided by forming one beam 21 into an R-shape in plan view that approximately matches the external shape of the outer periphery 61 in plan view between the virtual contact points 62, 62 at the corner 11.

[0030] Next, the operation and effect of the frame structure and the structure including the frame structure according to the embodiment of the present invention described above will be described with reference to Figs.

[0031] As shown in FIG. 1, a virtual cylinder 6 is assumed whose outer periphery 61 contacts with inner portions 21a, 21a of beams 21, 21 extending from the X direction and Y direction to the four corners 11 of the frame structure 1 at virtual contact points 62, 62. At each corner 11, the beams 21, 21 extending from the X direction and the Y direction to the corner 11 are formed into a planar R-shape (arc-shape) that approximately matches the planar outer shape of the outer periphery 61 of the virtual cylinder 6 between the virtual contact points 62, 62 and joined to form an arc corner 12 having a planar R-shape (arc-shape). In addition, at each corner 11, the structural grid 5 located between virtual tangents 63, 63 extending in the Z direction from the virtual contact points 62, 62 is formed into an R-shape (arc-shape) in a planar view along the outer periphery 61 of the virtual cylinder 6, forming an arc structural grid 51 that is a diagonal lattice type when viewed from the front and has an R-shape (arc-shape) when viewed from the planar view.

[0032] By the above mechanism, a frame structure 1 having a substantially rectangular shape in plan view, with four corners 11 having a geometric R-shape (arc-shape) in plan view as shown in FIG. 2, is obtained.

[0033] By forming the arc corner portion 12 and the arc frame grid 51 at the corner portion 11, all of the joints between the beams of the arc frame grid 51 become X-shaped intersections in plan view. Therefore, it is possible to easily form the arc frame grid 51 with an external shape of a diagonal lattice type when viewed from the front, which is a rational structural form that ensures horizontal rigidity at the arc corner portion 12, which is the corner of the frame structure 1.

[0034] In addition, by forming the arc corner portion 12 and the arc structural grid 51, the number of components forming the corner portion 11 can be reduced, making it possible to make the joining of components at the corner portion 11 as difficult as the general parts (planar parts) of the structural structure 1.

[0035] As described above, the corner portion 11 can be easily formed by forming the arc corner portion 12 and the arc frame grid 51 at the corner portion 11. Therefore, a frame structure 1 having structural rationality can be formed.

[0036] By forming the arc corner portion 12 and the arc frame grid 51, it is possible to suppress the thrust force that tends to expand the frame structure 1 in the outer circumferential direction at the arc corner portion 12. For example, as shown in FIG. 3, when an axial force F acts on the frame structure 1, a distributed load F of the axial force F is applied from the second diagonal column 4a of the frame grid 5 to the second diagonal column 4b of the arc frame grid 51. 1 Distributed load F when transmitted 1 The direction of action of the load F on the second diagonal column 4a and the second diagonal column 4b is approximately on the same plane. 1 Therefore, it is possible to suppress the generation of thrust force due to bending of the acting direction of the axial force at the corner portion 11. In addition, when a distributed load is transmitted from the first diagonal column 3 of the structural grid 5 to the first diagonal column 3 of the arc structural grid 51, the direction of action is also approximately on the same plane, so that the generation of thrust force can be suppressed in the same manner as described above.

[0037] From the above, by forming the arc corner portion 12 and the arc frame grid 51, it is possible to form a frame structure 1 that is mechanically rational, since it is possible to respond to localized external forces such as thrust forces without requiring reinforcing materials, etc.

[0038] By installing the frame structure 1 equipped with the above-mentioned mechanism in the high-rise structure to be constructed, it is possible to create a high-rise structure that has structural and mechanical rationality and ensures the desired horizontal rigidity against directional external forces such as earthquakes and wind forces.

[0039] In addition, since the virtual cylinder 6 is assumed at the stage of designing the frame structure 1 and manufacturing the materials, the shape of the virtual cylinder 6 can be appropriately modified. For example, the size of the diameter of the virtual cylinder 6 in plan view can be increased or decreased, or the outer shape in plan view can be modified to an ellipse. By modifying the virtual cylinder 6, the shapes of the arc corner portion 12 and the arc frame grid 51 can also be modified, so that the arc corner portion 12 and the arc frame grid 51 can be formed according to the structural and mechanical conditions of the frame structure 1.

[0040] Furthermore, when the first diagonal column 3 and the second diagonal column 4 are formed by box columns, an arc corner portion 12 and an arc structural grid 51 are formed at the corner portion 11, so that the first diagonal column 3 and the second diagonal column 4 located at the corner portion 11 form a curved shape in plan view that does not result in a complex configuration such as the column being twisted due to a 90° bending in plan view at the corner portion 11, and therefore the desired column strength can be easily ensured even at the corner portion 11.

[0041] The above describes embodiments of the frame structure and the structure equipped with the frame structure according to the present invention. However, the present invention is not limited to the above embodiments and can be modified as appropriate without departing from the spirit of the present invention.

[0042] For example, in the above embodiment, the frame structure 1 is formed without inclination with the Z direction as its axis, but the frame structure 1 may be formed with the axis direction inclined depending on the construction conditions. From FIG. 4(a), it is assumed that the corner 11a is formed to be inclined downward in the Z direction by an angle B. With the above configuration, the corner 11a is inclined in the Z direction when viewed from the front. The virtual pillar 6a having a truncated cone shape assumed to be in contact with the corner 11a has a circular outer shape in a plan view, and the circular diameter in a plan view changes linearly in the axial direction of the virtual pillar. The virtual pillar 6a having a truncated cone shape has an axis in the inclination direction of the corner 11a, and contacts the corner 11a at virtual contact points 63a, 63a with the inner parts 21a, 21a of the beams 21, 21 extending from the X direction and the Y direction to the corner 11a. With the above-mentioned configuration, the arc corner portion 12a and the arc frame grid 51a formed along the truncated cone-shaped virtual column 6a are formed at an angle B downward in the Z direction, so that the configuration takes into consideration the inclination of the corner portion.

[0043] Also, for example, in the above embodiment, the frame structure 1 is formed without inclination with the Z direction as the axis, but the frame structure 1 may be formed with the axis direction inclined depending on the construction conditions. As shown in Fig. 4(a), a structure that affects the arrangement of the frame structure 1 in the range from the bottom of the frame structure 1 to point C at the arc corner portion 12b is provided at position D close to the corner portion 11b. With the above configuration, the corner portion 11b has a vertical corner portion 111 formed in the Z direction from point C upward in the Z direction, and an inclined corner portion 112 formed in a front view downward in the Z direction from point C. A virtual cylinder 6b is assumed for the vertical corner portion 111 and is assumed to be located upward in the Z direction from point C. A virtual column is assumed for the inclined corner portion 112 and located downward in the Z direction from point C, and is formed as a truncated cone-shaped virtual column 6c that takes into account the inclination of the inclined corner portion 112. Assuming the above configuration, the vertical corner 111 forms an arc corner 12b and an arc frame grid 51b along the virtual cylinder 6b between the virtual tangents 63b between the inner parts 21a, 21a of the beams 21, 21 and the virtual cylinder 6b. The inclined corner 112 forms an arc corner 12c and an arc frame grid 51c along the truncated cone-shaped virtual column 6c between the inclined virtual tangents 63c between the inner parts 21a, 21a of the beams 21, 21 and the virtual cylinder 6b. With the above-mentioned configuration, the frame structure 1 can be configured so as not to affect the construction of the structure at position D.

[0044] As described above, the virtual cylinder 6 assumed for forming the arc corner portion 12 and the arc structural grid 51 is appropriately deformed according to the construction conditions of the structural structure 1, so that the structural structure 1 can be formed with an external shape that takes into account various conditions such as the construction conditions as shown in Figure 4(b). [Explanation of symbols]

[0045] 1 Frame structure 2 beam structure 3. First diagonal column 4. Second diagonal column 5. Structural grid 6 Virtual Cylinder 11 Corner 12 Circular arc corners 21 Beam 21a Inside part 21b Outer part 22 Rectangular structure 51 Arc frame grid 61 Outer periphery 62 Virtual Contacts 63 Virtual Tangent

Claims

1. A beam structure formed by combining beams in the circumferential direction on each floor of the structure; A plurality of first diagonal columns are arranged in parallel at predetermined intervals in the horizontal direction in the same vertical plane as the beam and are inclined in the same direction relative to the beam; A plurality of second diagonal columns are arranged in parallel at a predetermined interval in the horizontal direction in the same vertical plane as the beam and the first diagonal column, and are inclined in a direction symmetrical to the inclination direction of the first diagonal column with respect to the beam when viewed from the front; Equipped with the beam, the first diagonal column, and the second diagonal column are joined at intersections, The adjacent first diagonal columns and the adjacent second diagonal columns form a frame grid having an external shape of a diagonal lattice type when viewed from the front, The beam structure has an outer shape of a rectangle in plan view, with inner and outer corners curved in an arc shape in plan view. Frame structure.

2. a corner of the structure is in contact with the beam forming the corner in a plan view and has an outer shape in a plan view that is approximately the same as an arc shape in a plan view of an outer periphery of an imaginary cylinder whose axis is oriented in a vertical direction, The frame grid formed at the corner portion is formed along the outer periphery of the virtual cylinder. The frame structure according to claim 1.

3. The corner of the structure is formed at an incline, and has an outer shape in plan view that is approximately equal to the arc shape in plan view of an outer periphery of a virtual pillar having a truncated cone shape that is tangent to the beam forming the corner in plan view and has an axis that is inclined in the inclination direction of the corner, The frame grid formed at the corner is formed along the outer periphery of the virtual column. The frame structure according to claim 1.

4. A high-rise structure, A structure having a framework, comprising the framework according to any one of claims 1 to 3 at its outer periphery.

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