Supporting framework

Abstract

To provide a support framework which, being one to support a movement path provided in a protruding part, can prevent rainwater from leaking directly below while increasing the strength of the joint between a cantilever beam and a foundation steel frame.SOLUTION: A support framework 60 is provided on a framework that includes a protruding portion 42 that has a cantilever beam 48 extending from a central portion 41 toward the outdoors. The support framework 60 supports a movement path 55 used for movement between stories in the protruding portion 42. The support framework 60 has a joint 70 that is joined to the end of a first cantilever beam 66a and has a square steel pipe extending in up-down direction, and a first foundation steel frame 63 is rigidly joined to the joint 70 on a different story.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a support structure that supports a travel path installed on a protruding portion of a structure. [Background technology]

[0002] For example, as disclosed in Patent Document 1, a structure having a protruding portion formed by a cantilever is known as a building structure. In such a protruding portion, in addition to a balcony, stairs as a path between floors are installed. When a path of travel is installed in the protruding portion, a support structure for supporting the stairs is provided in the structure. The support structure has a foundation steel frame that is joined to the cantilever and supports the path of travel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 07-229200 Summary of the Invention [Problem to be solved by the invention]

[0004] The joint between the cantilever beam and the steel foundation is required to have high strength. Also, if an entrance lobby is located directly below the supporting structure, it is required to prevent rainwater from leaking directly below. [Means for solving the problem]

[0005] The support structure that solves the above problem is provided on a frame having a central portion supported by a foundation and a protruding portion having a cantilever beam extending from the central portion toward the outdoors, and supports a movement path used for movement between stories in the protruding portion. The support structure has a joint that is joined to the tip of the cantilever beam facing the outdoors and has a square steel pipe extending in the vertical direction, and a foundation steel frame whose one end and the other end are rigidly joined to the joint on a different story. Effect of the Invention

[0006] According to the present invention, it is possible to increase the strength of the joint between the cantilever beam and the underlying steel frame while preventing rainwater from leaking directly below. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a building having an embodiment of a support structure. [Diagram 2] FIG. 2 is a top view showing a schematic configuration of the frame on the first floor. [Diagram 3] FIG. 4 is a top view showing a schematic configuration of the frame on the second floor. [Figure 4] FIG. 2 is a top view showing a schematic configuration of the frame structure on a floor above the second floor. [Diagram 5] 11 is a perspective view showing an example of a movement path provided in a protruding portion. FIG. [Figure 6] FIG. 2 is a top view showing a schematic configuration of one embodiment of a support structure. [Figure 7] FIG. 2 is a perspective view showing a schematic structure of a cantilever beam of the support frame. [Figure 8] FIG. 13 is a diagram showing the joint structure between the first base steel frame and the joint. [Figure 9] FIG. 1 is a diagram showing the internal structure of a joint. [Figure 10] 13 is a diagram showing an example of a joint structure between a second cantilever beam and a second foundation steel frame. FIG. [Figure 11] FIG. 13 is a diagram showing an example of a support structure for a movement path. [Figure 12] FIG. 11 is a diagram for explaining an example of a connection structure between the supporting structure and the central section on the second floor, where (a) is a diagram showing the structure near the junction between the joint and the first foundation steel frame, and (b) is a diagram showing the structure near the junction between the second cantilever beam and the second foundation steel frame. [Figure 13] This is a diagram to illustrate an example of a connection structure between the central part and the supporting structure on the third floor. [Figure 14]These are diagrams showing the structure near the junction between the cantilever beam and the underlying steel frame on the third floor, where (a) is a diagram showing the structure near the junction between the cantilever beam and the first underlying steel frame, and (b) is a diagram showing the structure near the junction between the cantilever beam and the second underlying steel frame. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] An embodiment of a support structure will be described with reference to Figs. 1 to 14. As shown in FIG. 1, a building 10 includes a foundation 20 and a framework 40 . The foundation 20 is provided in an excavation space formed by excavating the ground 11. The foundation 20 has foundation piles 21, a mat slab 22, and foundation columns 23. The foundation piles 21, the mat slab 22, and the foundation columns 23 are integrally formed of reinforced concrete. The foundation piles 21 extend downward in the ground 11 from the bottom of the excavation space. The mat slab 22 is provided so as to cover the bottom of the excavation space. The foundation columns 23 extend upward from a predetermined position of the mat slab 22. The foundation columns 23 support the frame 40 via the seismic isolation layer 15, and form an underground space 25 between the mat slab 22 and the frame 40.

[0009] The frame 40 is formed by joining various steel materials such as H-shaped steel, square steel pipes, and steel plates. The frame 40 is formed of columns and beams connected via joints. The frame 40 has a central portion 41 and a pair of protruding portions 42. In FIG. 1, the areas of the central portion 41 and the protruding portions 42 are shown surrounded by a two-dot chain line.

[0010] In the central portion 41, the first story is supported by the foundation columns 23 via the seismic isolation layer 15. The central portion 41 has a first column 45 and a second column 46 extending from the first story to the top story. As will be described in detail later, the first columns 45 are columns located at the four corners of the central portion 41 when viewed from above the frame 40. The second columns 46 are columns located between the first columns 45 when viewed from above the frame 40. The central portion 41 also has a beam 47 connecting the first column 45 and the second column 46. In the building 10, the living space for users is provided in the central portion 41.

[0011] The protruding portion 42 has a cantilever beam 48 extending from the central portion 41 to the outdoors. In this embodiment, the protruding portions 42 are provided on the right and left sides of the central portion 41 in Fig. 1. In the building 10, the core portion consisting of the elevators, stairs, machine rooms, etc. is mainly provided in the protruding portion 42. Furthermore, the frame 40 has an anti-vibration stud 49 in the protruding portion 42 on the right side in Fig. 1 that connects the cantilever beam 48 between stories.

[0012] (Layout of foundation columns and center of first floor) The following describes the arrangement of the foundation columns 23 and the schematic configuration of the central portion 41. Note that the dashed dotted line shown in the figure indicates the center line of the building 10.

[0013] As shown in Fig. 2, the foundation 20 has foundation columns 23 at the intersections of the centerlines A and C and the centerlines 2, 3, and 4. Note that Fig. 1 shows the framework of a frame 40 in the centerline 2.

[0014] In the first story, the central part 41 has columns at the intersections of the grid lines A, B, C and the grid lines 2, 3, 4. Specifically, the central part 41 has first columns 45 located at the four corners. The central part 41 has, as second columns 46, a second column 46B located between the first columns 45 in the grid lines 2, 4, and a second column 463 located between the first columns 45 in the grid lines A, C. The second column 46B located in the grid lines 2, 4 is the second column 46 located between a pair of protruding parts 42. The second column 46 shown in FIG. 1 is the second column 46B located in the grid line 2. The second column 463 located in the grid lines A, C is the second column 46 located at the base end portion of the protruding part 42, in other words, the boundary portion between the central part 41 and the protruding part 42. In the following, when the second columns 46B and 463 are not distinguished from each other, they are simply referred to as the second column 46. In this embodiment, the central portion 41 has a third pillar 50 at the intersection of the center line B and the center line 3. The third pillar 50 extends from the first story to the second story.

[0015] Furthermore, in the first story, the central portion 41 has beams that extend along the center lines A, B, C, 2, 3, and 4. Specifically, the central portion 41 has a beam 47 that extends along the center lines A, C, 2, and 4 and connects the first column 45 and the second column 46. Furthermore, the central portion 41 has a beam 51 that extends along the center lines B and 3 and connects the second column 46 and the third column 50.

[0016] (Central part in other hierarchies) As shown in FIG. 3, in the second story, the central portion 41 has beams 47, 51 so as to form an open-ceiling space 52 that spans the first and second stories.

[0017] As shown in Fig. 4, in the stories above the second story, the central section 41 has long-span beams 53 that extend along the center line B, 3 and connect the second columns 46B, 463 to each other so that the living space is a column-free space. Of the beams 53, those that extend along the center line 3 have protruding parts 42 on both sides, which reduces stress generated in the center of the beam.

[0018] (Route of travel) As shown in FIG. 5, the building 10 has a travel path 55 in the protruding portion 42 on the left side in FIG. 1. The travel path 55 is used when users of the building 10 move between the second and third floors. In this embodiment, the travel path 55 is a staircase. The travel path 55 is supported by a support structure composed of the cantilever beams 48 of the second and third floors. In the building 10, an entrance lobby is provided directly below the travel path 55.

[0019] (Support frame) As shown in FIG. 6, the support structure 60 has a cantilever portion 612 , a cantilever portion 613 , a first foundation steel frame 63 , a second foundation steel frame 64 , and a third foundation steel frame 65 .

[0020] The cantilever portion 612 is one of the cantilevers 48 that form the protruding portion 42 in the second story. The cantilever portion 612 is joined to a joint 54 located at the intersection of the center lines A,3. The cantilever portion 613 is one of the cantilever beams 48 that form the protruding portion 42 in the third story. The cantilever portion 613 is joined to a joint 54 located at the intersection of the center lines A,2 in the third story. In the following, when there is no need to distinguish between the cantilever portions 612 and 613, they will simply be referred to as the cantilever portion 61.

[0021] The first foundation steel frame 63, the second foundation steel frame 64, and the third foundation steel frame 65 are formed by joining various types of H-shaped steel and steel plates. The first foundation steel frame 63 has one end joined to the middle part of the cantilever part 612 of the second story, and the other end joined to the middle part of the cantilever part 613 of the third story.

[0022] One end of the second foundation steel frame 64 is joined to the tip of the cantilever portion 612 of the second story, and the other end is joined to the tip of the cantilever portion 613 of the third story. The foundation steel frames 63, 64 are provided like a brace connecting the cantilevers 612, 613.

[0023] The third foundation steel frame 65 connects the first foundation steel frame 63 and the second foundation steel frame 64. Specifically, the third foundation steel frame 65 connects the first foundation steel frame 63 and the second foundation steel frame 64 by having a web bolted to a gusset plate provided on each of the foundation steel frames 63, 64.

[0024] (Cantilever beam) The cantilever portion 61 has a first cantilever beam 66a, a second cantilever beam 66b, and a joint 70. The joint 70 is provided between the first cantilever beam 66a and the second cantilever beam 66b, in other words, in the middle of the cantilever portion 61. The joint 70 is a portion where the first foundation steel frame 63 is rigidly joined. In the following, when there is no need to distinguish between the first cantilever beam 66a and the second cantilever beam 66b, they will simply be referred to as cantilever beam 66.

[0025] (Cantilever beam) As shown in FIG. 7, the cantilever beam 66 is formed of an H-shaped steel 67 and a cover plate 68. The cover plate 68 is joined to the H-shaped steel 67 so as to cover the side opening of the H-shaped steel 67. This increases the rigidity of the cantilever beam 66. In the first cantilever beam 66a, the portion joined to the joint 54 is formed of the wide H-shaped steel 67 (see FIG. 6). This increases the cross-sectional area of ​​the first cantilever beam 66a, thereby increasing the strength of the end portion on the joint 54 side.

[0026] (Joint) The structure of the joint 70 will be described with reference to Fig. 8. In Fig. 8, the cover plate 68 is omitted and the cantilever portion 61 is shown.

[0027] The connection 70 has a square steel pipe 71, an upper end connecting plate 72, a lower end connecting plate 73, and an intermediate connecting plate 74. The square steel pipes 71 are disposed so as to extend in the vertical direction. To the square steel pipes 71, webs of the cantilever beams 66 and webs of the first foundation steel frame 63 are joined.

[0028] The upper end connecting plate 72 is joined to the upper end of the square steel pipe 71. The upper end connecting plate 72 is provided so as to cover the upper end opening of the square steel pipe 71. An upper flange of the cantilever beam 66 is joined to the upper end connecting plate 72. The lower end connecting plate 73 is joined to the lower end of the square steel pipe 71. The lower end connecting plate 73 is provided so as to cover the lower end opening of the square steel pipe 71. A lower flange of the cantilever beam 66 is joined to the lower end connecting plate 73.

[0029] The intermediate joint plate 74 is provided between the upper end joint plate 72 and the lower end joint plate 73 so as to divide the square steel pipe 71 in the vertical direction. A flange of the first foundation steel frame 63 is joined to the intermediate joint plate 74. The intermediate joint plate 74 is provided according to the position where the first foundation steel frame 63 is attached to the joint 70.

[0030] At the joint 70 of the cantilever portion 613 on the third story, the upper flange of the first foundation steel frame 63 is joined to the upper end joint plate 72. Therefore, an intermediate joint plate 74 is provided at the joint 70 so as to vertically divide the square steel pipe 71 into two. The lower flange of the first foundation steel frame 63 is joined to the intermediate joint plate 74.

[0031] Meanwhile, an intermediate joint plate 74 is provided at the joint 70 of the cantilever portion 612 on the second story so as to vertically divide the square steel pipe 71 into three. The upper flange of the first foundation steel frame 63 is joined to the upper intermediate joint plate 74. The lower flange of the first foundation steel frame 63 is joined to the lower intermediate joint plate 74.

[0032] 9, the joint 70 has a reinforcing plate 75 inside the square steel pipe 71. The reinforcing plate 75 is provided so as to extend in the vertical direction. The reinforcing plate 75 is joined to a first side surface portion 71a to which the web of the first foundation steel frame 63 is joined and a second side surface portion 71b opposite to the first side surface portion 71a.

[0033] (Connection structure between the cantilever and the first base steel frame) As shown in FIG. 8, the first foundation steel frame 63 is rigidly connected to the joint 70. Specifically, the first foundation steel frame 63 has a first steel frame main body 81 and a first connecting member 82. The first steel frame main body 81 and the first connecting member 82 are formed of H-shaped steel. The first steel frame main body 81 is connected to the joint 70 via the first connecting member 82. The first connecting member 82 is connected to the joint 70. The first connecting member 82 is also connected to the end of the first steel frame main body 81 using a joint. Specifically, the first connecting member 82 is connected to the end of the first steel frame main body 81 by a pair of upper flange joint plates 83 that sandwich the upper flange in the vertical direction, a pair of web joint plates 84 that sandwich the web in the width direction, and a pair of lower flange joint plates 85 that sandwich the lower flange in the vertical direction, which are fastened by fastening members.

[0034] (Connection structure between the cantilever and the second base steel frame) The joint structure between the cantilever portion 61 and the second foundation steel frame 64 will be described. The second foundation steel frame 64 is basically joined to the cantilever portions 612, 613 by the same joint structure. Therefore, the joint structure between the cantilever beam and the second foundation steel frame will be described here using the cantilever portion 613 of the third story.

[0035] As shown in FIG. 10, the second foundation steel frame 64 is pin-joined to the tip of the second cantilever beam 66b. Specifically, the second foundation steel frame 64 has a second steel frame main body 86 and a second connecting member 87. The second steel frame main body 86 and the second connecting member 87 are formed of H-shaped steel. The second steel frame main body 86 is connected to the second cantilever beam 66b via the second connecting member 87. The second connecting member 87 is joined to the H-shaped steel 67 of the second cantilever beam 66b. The second connecting member 87 is joined to the end of the second steel frame main body 86 by fastening a pair of web joint plates 88 that sandwich the web in the width direction with fastening members.

[0036] The second connection member 87 is supported from below by a support member 90 joined to the second cantilever beam 66b. The support member 90 is composed of a support rib 91 and a support plate 92. The support rib 91 is joined to the web and the lower flange of the H-shaped steel 67. The support plate 92 is joined to the web of the H-shaped steel 67 and the upper end of the support rib 91. The support plate 92 is provided so as to cover the joint between the second steel frame main body 86 and the second connection member 87 from below. The support plate 92 may be joined to the second steel frame main body 86 and the second connection member 87. A reinforcing plate 93 is joined to the second cantilever beam 66b on the opposite side of the second connection member 87 and the support rib 91.

[0037] (Support structure for travel path) The support structure of the movement path 55 by the support frame 60 will be described. 11 , the travel path 55 has a plurality of staircase bodies 95 formed of stepped steel plates, and stringers 96 joined to each staircase body 95. The stringers 96 are provided at both ends in the width direction of the staircase body 95, as well as at a middle position in the width direction of the staircase body 95. The supporting structure 60 supports the travel path 55 by joining the stringers 96 to gusset plates 97 provided on the third foundation steel frame 65.

[0038] (Connection structure between the center of the frame other than the cantilever and the supporting frame) As shown in Fig. 6, in the second story, the supporting structure 60 is connected to the central portion 41 via a steel beam 100 joined to the joint 70 of the cantilever portion 612, and a steel beam 101 joined to the tip of the cantilever portion 612. In the third story, the tip of the second cantilever beam 66b of the supporting structure 60 is connected to the central portion 41 via a steel beam 102 arranged outside the cantilever portion 613. In the supporting structure 60, the first foundation steel frame 63 is connected to the central portion 41 via the steel beam 103.

[0039] As shown in Figures 12(a) and 12(b), on the second floor, the support structure 60 is connected to the central portion 41 (see Figure 6, etc.) via a slab 105. The slab 105 is formed so that a part of the cantilever portion 612 and studs (not shown) provided on the steel beams 100, 101 are embedded in the slab 105.

[0040] As shown in FIG. 13, in the third story, the support structure 60 is connected to the central portion 41 via steel plates 106, 107, 108, and 109 that are provided to cover the openings formed in the periphery. The steel plate 106 is joined to the first cantilever beam 66a, the second cantilever beam 66b, and the steel beam 102. The steel plate 107 is joined to the second foundation steel frame 64, the third foundation steel frame 65 of the uppermost stage, and the second cantilever beam 66b. The steel plate 108 is joined to the first cantilever beam 66a and the steel beam 103. The steel plate 109 is joined to the steel beam 103. The steel plates 106 to 109 are provided with hanging pieces (not shown). In FIG. 13, the steel plates 106 to 109 are marked with dots.

[0041] 14(a) and 14(b), on the third story, the support structure 60 is connected to the central portion 41 (see FIG. 13, etc.) via a slab 110. The slab 110 is formed so that a part of the joint 70 and the hanging pieces provided on the steel plates 106-109 are embedded.

[0042] The operation and effects of this embodiment will be described. (1) The travel path 55 and the support structure 60 supporting the travel path 55 are provided in the frame 40 at the protruding portion 42 protruding from the central portion 41. The support structure 60 has a joint 70 joined to the tip of the first cantilever beam 66a facing outdoors and having a square steel pipe 71 extending in the vertical direction, and a first foundation steel frame 63 having one end and the other end rigidly joined to the joint 70 on a different story.

[0043] In this way, by rigidly joining the first foundation steel frame 63 to the joint 70 joined to the first cantilever beam 66a, the strength of the joint can be increased compared to when the first foundation steel frame 63 is directly joined to the first cantilever beam 66a formed of the H-shaped steel 67 and the cover plate 68. In addition, the risk of water leakage can be reduced.

[0044] (2) The square steel pipe 71 of the connection 70 has a first side portion 71a to which the first foundation steel frame 63 is joined and a second side portion 71b facing the first side portion 71a. The connection 70 also has a reinforcing plate 75 that extends vertically inside the square steel pipe 71 and is joined to the first side portion 71a and the second side portion 71b. This increases the strength of the connection 70, in particular the strength against the load transmitted from the first foundation steel frame 63 to the connection 70.

[0045] (3) The connection 70 has an upper end connection plate 72 provided at the upper end of the square steel pipe 71 to which the upper flange of the cantilever beam 66 is joined, and a lower end connection plate 73 provided at the lower end of the square steel pipe 71 to which the lower flange of the cantilever beam 66 is joined. The connection 70 also has an intermediate connection plate 74 provided between the upper end connection plate 72 and the lower end connection plate 73 so as to divide the square steel pipe 71 in the vertical direction, and to which the flange of the foundation steel frame (the first foundation steel frame 63 or the second foundation steel frame 64) is joined. This allows the cantilever beam 66 and the foundation steel frame to be firmly joined to the connection 70 while increasing the degree of freedom in the joining position of the foundation steel frame to the connection 70.

[0046] (4) At the tip of the second cantilever beam 66b, stress generated during an earthquake or the like is small. Therefore, the second cantilever beam 66b and the second foundation steel frame 64 can be joined by a pin joint, which is simpler than a rigid joint.

[0047] (5) The support structure 60 is connected to the central portion 41 via the steel plates 106-109. This allows the stress generated in the support structure 60 to be transmitted to the central portion 41 via the steel plates 106-109. In addition, these steel plates 106-109 are provided so as to cover the peripheral openings. This makes it possible to prevent rainwater from leaking through these openings.

[0048] This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction. The support structure 60 does not have to be connected to the central portion 41 via the steel plates 106-109.

[0049] The second foundation steel frame 64 may be rigidly connected to the second cantilever beam 66b. The first foundation steel frame 63 may have flanges joined to the upper end joint plate 72 and the lower end joint plate 73 .

[0050] The connection 70 may have a rib-shaped reinforcing plate inside the square steel pipes 71. Also, the connection 70 may be formed only by the square steel pipes 71. The route of movement is not limited to stairs, but may be a ramp or other inclined path. [Explanation of symbols]

[0051] 10...building, 11...ground, 15...seismic isolation layer, 20...foundation, 21...foundation pile, 22...mat slab, 23...foundation column, 25...underground space, 40...framework, 41...center, 42...projection, 45...first column, 46,463,46B...second column, 47...beam, 48...cantilever beam, 49...vibration-proof stud, 50...third column, 51...beam, 52...open space, 53...beam, 54...joint, 55...movement path, 60...supporting structure, 61,612,613...cantilever portion, 63...first base steel frame, 64...second base steel frame, 65...third base steel frame, 66a...first cantilever beam, 66b...second cantilever beam, 67...H-shaped steel, 68...cover plate, 70...Connection, 71...Square steel pipe, 71a...First side portion, 71b...Second side portion, 72...Upper end joint plate, 73...Lower end joint plate, 74...Intermediate joint plate, 75...Reinforcement plate, 81...First steel frame body, 82...First connection member, 83...Upper flange joint plate, 84...Web joint plate, 85...Lower flange joint plate, 86...Second steel frame body, 87...Second connection member, 88...Web joint plate, 90...Support member, 91...Support rib, 92...Support plate, 93...Reinforcement plate, 95...Staircase body, 96...Beam, 97...Gusset plate, 100,101,102,103...Steel beam, 105...Slab, 106,107,108,109...Steel plate, 110...Slab.

Claims

1. A support structure is provided on a frame having a central portion supported by a foundation and a protruding portion having a cantilever beam extending from the central portion toward the outdoors, and supports a movement path used for movement between floors in the protruding portion, a joint having a square steel pipe joined to the tip of the cantilever beam facing the exterior and extending in the vertical direction; A foundation steel frame whose one end and the other end are rigidly connected to the joints on different stories. Support frame.

2. The square steel pipe has a first side portion to which the foundation steel frame is joined and a second side portion opposite to the first side portion, The joint has a reinforcing plate joined to the first side portion and the second side portion inside the square steel pipe. The support structure according to claim 1.

3. The cantilever beam has an H-shaped steel with a web joined to the square steel pipe, The foundation steel frame has an H-shaped steel having a web joined to the square steel pipe and a height lower than that of the cantilever beam, The joint is: An upper end joint plate joined to the upper end of the square steel pipe and to which the upper flange of the cantilever beam is joined; A lower end joint plate joined to the lower end of the square steel pipe and to which the lower flange of the cantilever beam is joined; and an intermediate joint plate that is joined between the upper end joint plate and the lower end joint plate so as to divide the square steel pipe in the vertical direction and to which a flange of the foundation steel frame is joined. The support structure according to claim 1.

4. A first cantilever beam, which is the cantilever beam; A first base steel frame which is the base steel frame; a second cantilever beam connected to the joint and extending from the joint toward the exterior; A second foundation steel frame, one end and the other end of which are pin-connected to the second cantilever beam of the different story. The support structure according to claim 1.

5. A steel plate is provided to connect the central portion and the support structure. The support structure according to claim 1.

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