JP6382505B2 - Intermediate floor support structure - Google Patents

Description

  The present invention relates to a support structure for an intermediate floor in a building such as a house.

  There is known a building having a frame structure in which pillars are erected at intersections of a plurality of perpendicular cores and beams are constructed between adjacent pillars. The floor of this building is formed by laying floor boards on beams.

  Some buildings of this type are known in which a floor is provided in the middle of the upper and lower floors that constitute a general floor height. For example, Patent Document 1 describes a structure in which a plurality of studs provided with arms are provided between adjacent pillars, and an intermediate floor having a floor frame and a floor board is supported by arms taken from the middle of the studs. ing.

JP 2009-299416 A

  However, in the structure disclosed in Patent Document 1, a pair of arms protrudes from any side wall that surrounds the intermediate floor from three directions, and the floor frame of the intermediate floor is fixed to the arms. In such a structure, there is a problem that an opening such as a large window or a vibration control device cannot be provided at a position where the arm protrudes on the side wall, and the degree of freedom in design is impaired. .

  An object of this invention is to provide the support structure of the intermediate floor which can improve the freedom degree of a design and attachment operation | work, when providing an intermediate floor.

  In order to solve the above problems, the present invention stands at the intersection of a plurality of first cores parallel to each other and a plurality of second cores parallel to each other and perpendicular to the first core. A support structure for an intermediate floor in a multi-storey building comprising a pillar provided, a beam disposed between adjacent pillars, and a floor supported by the beam, the first floor and the rooftop floor A floor area where floors are laid and a rectangular non-floor area where floors are not laid are formed on a predetermined floor excluding, and beams that define the no-floor area are formed around the four floors of the non-floor area. Is located in the interior of the floorless area along the beam that defines the floorless area in a plan view, and is lower than the beam that defines the floorless area and higher than the beam on the lower floor The intermediate floor floor beam frame is provided, and the floor material constituting the intermediate floor is supported by the intermediate floor floor beam frame. The intermediate column supporting the frame is fixed to at least one of the beam defining the floorless region or the beam on the lower floor immediately below it, and the intermediate floor beam frame is the first intermediate beam along the first grid. And a second intermediate beam along the second core and joined to the first intermediate beam, and a corner formed by joining the first intermediate beam and the second intermediate beam. The first intermediate beam and the second intermediate beam are provided with joint portions that are joined to the studs at positions on both sides of the corner portion, and the first intermediate beam provided across the corner portion. Any one of the joint portion and the joint portion of the second intermediate beam is joined to the stud.

  In the intermediate floor support structure described above, the first intermediate beam and the second intermediate beam are provided with joint portions that can be joined to the studs at positions on both sides of the corner portion. It is possible to select whether to join the studs to the part. Thus, for example, when it is desired to provide a large opening or a vibration control device in a space overlapping with the beam on one joint side in the vertical direction, the other joint is not provided with a stud on one joint side. It is possible to provide a stud on the side and connect the other joint to the stud. In addition, for example, when a stud is already provided on one side of the joint, such as after construction of a building, the stud can be easily replaced when the stud is in the way of renovation or the like. That is, after changing the arrangement of the stud provided on one joint side to the other joint, the other joint can be connected to the stud. As described above, according to the support structure for the intermediate floor described above, the arrangement of the studs for providing the intermediate floor can be designed flexibly. Therefore, when providing the intermediate floor, the degree of freedom in design and installation work is improved. be able to.

  Further, in plan view, it is preferable that the distance between the beam on the first core and the first intermediate beam is equal to the distance between the beam on the second core and the second intermediate beam. Thereby, the case where the stud is provided on the beam side on the first core and the case where the stud is provided on the beam side on the second core can be used in common.

  The first intermediate beam and the second intermediate beam are H-shaped steel formed by joining a pair of upper and lower flanges with a web, and one of the first intermediate beam and the second intermediate beam is The end portion has a joint portion formed integrally with the web of one intermediate beam, the joint portion has a contact surface portion in surface contact with the web of the other intermediate beam, and the contact surface portion is the other It is preferable that the corner is formed by being fastened and fixed to the web of the intermediate beam. As a result, the web of the first intermediate beam and the web of the second intermediate beam are firmly fixed via the contact surface portion of one of the intermediate beams, so that a load is applied between the first intermediate beam and the second intermediate beam. Can be transmitted smoothly. As a result, it is more effective that there is a difference in the support strength of the intermediate floor between the case where the stud is joined to the joint of the first intermediate beam and the case where the stud is joined to the joint of the second intermediate beam. Can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, when providing an intermediate floor, the freedom degree of design and attachment work can be improved.

It is a sectional side view which shows the outline of the building which concerns on embodiment of this invention. It is a plane sectional view showing the outline of the building concerning this embodiment. It is sectional drawing along the III-III line of FIG. It is a perspective view which shows joining of the pillar which concerns on this embodiment, a beam, an intermediary pillar, and an intermediate beam. It is a side view of the stud concerning this embodiment. It is a figure which shows a stud, (a) is sectional drawing along the VI-VI line of FIG. 5, (b) is sectional drawing along the bb line of (a). It is a figure which shows a 1st intermediate beam, (a) is a side view, (b) is sectional drawing along the bb line of (a), (c) is cc of (a). It is sectional drawing along a line. It is a figure which shows a 2nd intermediate beam, (a) is a side view, (b) is sectional drawing along the bb line of (a), (c) is cc of (a). It is sectional drawing along a line. It is an enlarged view of the edge part of a 2nd intermediate beam. It is a figure which shows the edge part of a 2nd intermediate beam, (a) is sectional drawing along XX of FIG. 9, (b) is sectional drawing along bb line of (a). is there. It is a schematic plane sectional view for demonstrating the structure of the corner part vicinity of an intermediate floor floor beam frame. It is sectional drawing along the XII-XII line | wire of FIG.

  Hereinafter, an embodiment of a support structure for an intermediate floor according to the present invention will be described with reference to the drawings. As shown in FIG. 1 and FIG. 2, the building 1 according to the present embodiment is a two-story (two-layered) industrialized house having a steel beam-winning frame, and is standardized (standardized) in advance. The frame is configured by a combination of structural members. As structural members, in addition to pillars and beams constituting the frame, floor boards and intermediate beams are also included. Each structural member is manufactured at a factory and assembled at a construction site.

  Moreover, the building 1 has a 305 mm planar module (M), and columns and beams (including foundation beams) are arranged on a grid that is defined by an integral multiple of the planar module (M). Specifically, the cores are, for example, a plurality of horizontal cores (first cores) L1, L2 parallel to each other and a plurality of vertical cores (second cores) L3, parallel to each other. L4 is orthogonal to each other to form a lattice, and a column is erected at the intersection of the first core and the second core.

The building 1 includes a first floor F1 and a second floor F2, and an intermediate floor F3 is provided at an intermediate height between the first floor F1 and the second floor F2, and an intermediate floor on the first floor. In the region below the floor F3, a first floor low floor F4 is formed which is one step lower than the first floor F1. Further, the intermediate floor F3 is not located at a position where the height from the first floor F1 to the second floor F2 is equally divided, but is shifted toward the second floor F2 (see FIG. 3). The building 1 includes a lower staircase 2 that connects the first floor and the intermediate floor, and an upper staircase 3 that connects the intermediate floor and the second floor.
[Second floor and non-floor space]

  FIG. 2 is a plan sectional view showing an outline of the building 1. As shown in FIG. 2, the plurality of pillars 4A, 4B, 4C, 4D are respectively erected at four intersections of the first cores L1, L2 and the second cores L3, L4. . More specifically, the column 4A is at the intersection of the first core L1 and the second core L3, and the column 4B is at the intersection of the first core L1 and the second core L4. The column 4C is erected at the intersection of the first core L2 and the second core L4, and the column 4D is erected at the intersection of the first core L2 and the second core L3. . A beam 5 (second floor beam) is installed between the adjacent columns 4A to 4D. The area of the second floor level is divided into a floor area A1 where the floor is laid and a rectangular non-floor area where the floor is not laid (meaning that there is no floor at the second floor level) A2.

In the floor area A1, small beams are appropriately installed between the beams 5 laid in parallel, and a floor board B made of an ALC (lightweight cellular concrete) panel is laid on the beams 5 and on the small beams. Thus, the second floor F2 is formed. On the other hand, the floor board B is not laid in the floorless area A2, and a floor opening S is formed. The floorless area A2 includes a beam 5 constructed on the first core L1 between the pillars 4A and 4B, and a beam 5 constructed on the first core L2 between the pillars 4C and 4D. A beam 5 erected on the second core L3 between the columns 4A and 4D, and a beam 5 erected on the second core L4 between the columns 4B and 4C; It is defined by. That is, the beams 5 that define the floorless area A2 are arranged around the four floors of the floorless area A2.
[Middle floor]

  As shown in FIGS. 2, 3, and 4, the intermediate floor F3 is formed in a partial area in the floorless area A2, and the intermediate floor space S1 having a high ceiling height above the intermediate floor F3, Below the intermediate floor F3 is a low ceiling space S4 with a low ceiling height. Of the floor opening S (no floor area A2), a part of the area other than the intermediate floor F3 is provided with a stair unit composed of the lower staircase 2 and the upper staircase 3 to form a staircase room S3. The other region is a blow-through portion S2. The intermediate floor F3 is formed of a floor board (floor material) B made of ALC, like the second floor F2. The floor board B extends along the beam 5 that defines the floorless region A2 in a plan view inside the floorless region A2, and is lower than the beam 5 that defines the floorless region A2 and is the foundation beam (first floor beam) 37. The first intermediate beam 7, the pair of second intermediate beams 8 A and 8 B, the third intermediate beam 6, and the first intermediate beam 7 provided between the first intermediate beam 7 and the third intermediate beam 6. 4 supported by the intermediate beam 10. Here, “arranged along the beam 5” includes a case where the beam 5 is arranged away from the beam 5 and extends in the same direction as the extending direction of the beam 5.

  The first intermediate beam 7 is adjacent to the beam 5 on the first core L1 in plan view, and is provided in parallel with the first core L1. The second intermediate beam 8A is adjacent to the beam 5 on the second core L3 in plan view, and is provided in parallel with the second core L3. The second intermediate beam 8B is adjacent to the beam 5 on the second core L4 in plan view and is provided in parallel with the second core L4. The third intermediate beam 6 is disposed in parallel to the first intermediate beam 7 at a position opposite to the first intermediate beam 7 with the second intermediate beams 8A and 8B interposed therebetween. More specifically, the third intermediate beam 6 is provided at the boundary between the intermediate floor space S1, the blow-through portion S2, and the staircase S3 in plan view.

  The first intermediate beam 7, the second intermediate beams 8A and 8B, and the third intermediate beam 6 are joined to each other at their ends to form a rectangular frame-shaped intermediate floor beam frame 9.

  FIG. 7 is a diagram showing a configuration of the first intermediate beam 7. As shown in FIG. 7, the first intermediate beam 7 is a long member made of H-shaped steel including a pair of upper and lower flanges 71 </ b> A and 71 </ b> B and a web 72 that joins the pair of flanges 71 </ b> A and 71 </ b> B. The cross section is an open section. The web 72 has a joint 73 formed of four bolt insertion holes 72 a to which other members such as a stud are joined over the entire length of the first intermediate beam 7, with an interval corresponding to the planar module (M) (a flat surface at both ends). An interval of one half (M / 2) of the module (M) and the other intermediate portion are provided at an interval equal to the planar module (M).

  In the present embodiment, the second intermediate beams 8A and 8B are bolted to the outermost joint 73 of the first intermediate beam 7, and the studs 11A and 11B are bolted to the adjacent joint 73, respectively. In addition to the joint portion 73, the web 72 is appropriately formed with an opening 72b used for wiring insertion or the like. The configuration of each member of the third intermediate beam 6 is the same as the configuration of the first intermediate beam 7 shown in FIG. In the present embodiment, the third intermediate beam 6 is supported by the second intermediate beams 8A and 8B by fastening the outermost joint 73 to the second intermediate beams 8A and 8B, respectively.

  A portion sandwiched between the joint portions 73 and 73 to which the studs 11A and 11B are joined is a general portion 74. The cross-sectional position where the cross-sectional performance becomes the smallest within the region of the joint 73 where the studs 11A and 11B are joined is the position where the center of the bolt insertion hole 72a is cut (see FIG. 7B). On the other hand, among the portions sandwiched between the general portion 74, that is, the left and right joint portions 73 and 73 to which the studs 11A and 11B are joined, the cross-sectional position having the smallest cross-sectional performance is a position that cuts the center of the opening 72b (FIG. 7). (See (c)). Therefore, the joint part 73 actually joined to the studs 11 </ b> A and 11 </ b> B has a cross-sectional performance at least equal to or smaller than the part having the smallest cross-sectional performance in the general part 74. Here, if the opening 72b is not formed, the cross-sectional position having the smallest cross-sectional performance in the general portion 74 cuts the center of the bolt insertion hole 72a at the joint 73 where the studs 11A and 11B are not joined. This is equivalent to the minimum cross-sectional performance in the joint 73 region where the studs 11A and 11B are joined. Therefore, the strength of the joint portion 73 actually joined to the studs 11A and 11B does not decrease locally as compared with the other general portions 74, and the performance in terms of the strength of the intermediate beam is ensured to a certain level or more. ing.

  The studs 11A, 11B, 11C, and 11D are support means for supporting the intermediate beam. As shown in FIG. 2, the pair of studs 11 </ b> A and 11 </ b> B is erected on the foundation beam (first floor beam) 37 on the first core L <b> 1 and the upper end is the beam (second floor beam) 5. It is joined and supports the first intermediate beam 7 at positions near its both ends. The stud 11C is erected on the foundation beam (first-floor beam) 37 on the second core L3, and the upper end is joined to the beam (second-floor beam) 5. The second intermediate beam 8A is It is supported at a position near one end. Similarly, the stud 11D is erected on the foundation beam (first-floor beam) 37 on the second core L4, and the upper end is joined to the beam (second-floor beam) 5. The second intermediate beam 8B is supported at a position near one end thereof.

  The configuration of the studs 11A to 11D will be described using the stud 11A as an example with reference to FIGS. 4 and 5. FIG. 4 is a perspective view showing the joining of the column 4A, the beam 5, the intermediary column 11A, the first intermediate beam 7, and the second intermediate beam 8A. As shown in FIGS. 4 and 5, the stud 11 </ b> A has a lower end (a lower end 114 a of a beam joint 114 described later) joined to a foundation beam (first floor beam) 37 and an upper end (a beam joint described later). A main body part 111 where the upper end part 113a) of the part 113 is joined to the beam (second floor beam) 5, a bracket part 115 taken out from the middle part of the main body part 111 and joined to the side surface of the first intermediate beam 7A, It has.

  The main body 111 has a rectangular steel pipe portion 112 and beam joint portions 113 and 114 provided at both upper and lower ends of the steel pipe portion 112. The beam joint portion 113 is a member joined to the beam 5 at its upper end portion 113a, and the beam joint portion 114 is a member joined to the foundation beam 37 at its lower end portion 114a. The beam joint 113 is brought into contact with the lower flange 5A of the beam 5 in which a plurality of bolt holes are formed at intervals corresponding to the planar module (M), and is fastened with bolts. Fastened with protruding anchor bolts. The columns 4A to 4D also include a main body portion made of a rectangular steel pipe. However, the main body portion 111 of the inter-column 11A is thicker than the main body portions of the columns 4A to 4D and has higher bending rigidity. Moreover, the external shape of the cross section of the main-body part 111 of the stud 11A is the same as the external shape of the cross-section of the main-body part of the pillars 4A-4D.

  The bracket portion 115 has a U-shaped cross section, and both end portions are welded to the steel pipe portion 112. The bracket portion 115 connects the top and bottom horizontal plane portions 116A and 116B taken out from the steel pipe portion 112 to the tips of the horizontal plane portions 116A and 116B, and makes surface contact with the joint portion 73 (web 72) of the first intermediate beam 7. And a vertical surface portion 117 to be bolted. Note that ribs 118, which are plate-shaped reinforcing materials, are provided inside the horizontal surface portions 116A and 116B and the vertical surface portion 117.

  As shown in FIG. 6, the width of the tip of the horizontal surface portion 116 </ b> B corresponds to the width of the vertical surface portion 117 and is enlarged from the middle compared to the width of the root. The same applies to the horizontal plane portion 116A. In addition, the height dimension of the vertical surface portion 117 is smaller than the height dimension of the web 72 of the first intermediate beam 7. Here, the height dimension of the vertical surface portion 117, that is, the height dimension of the bracket portion 115 is the lower end (the lower surface of the horizontal surface portion 116 </ b> B) of the bracket portion 115 taken out from the steel pipe portion 112 in the horizontal direction. The upper surface). The height dimension of the web 72 of the first intermediate beam 7, that is, the height dimension of the first intermediate beam 7 means a dimension from the upper surface of the lower flange 71B to the lower surface of the upper flange 71A.

  Both left and right joint portions 73, 73 of the first intermediate beam 7 are bolted to the vertical surface portions 117 of the bracket portions 115 of the pair of intermediate columns 11A, 11B. As a result, both end portions of the first intermediate beam 7 Are supported by the studs 11A and 11B, respectively. On the other hand, the third intermediate beam 6 is not supported by the studs 11A to 11D but is supported by the pair of second intermediate beams 8A and 8B.

  FIG. 8 is a diagram showing a configuration of the second intermediate beam 8A. As shown in FIG. 8, the second intermediate beam 8 </ b> A is provided with an elongated main body portion 81 made of a steel material having an open cross section, and both ends of the main body portion 81. Joints 85, 85 connected to the intermediate beam 6 are provided. Since the configuration of the second intermediate beam 8B is the same as that of the second intermediate beam 8A, the second intermediate beam 8A will be described below, and the detailed description of the second intermediate beam 8B will be omitted. The main body 81 is made of an H-section steel formed by joining a pair of upper and lower flanges 82A and 82B with a web 83. The shape of the main body 81 is basically the same as that of the first intermediate beam 7 and the third intermediate beam 6 including the cross-sectional dimensions. However, the joint portion 84 including the four bolt insertion holes 83a has four at both ends. Is set to be equal to the planar module (M) at the other intermediate portion so that the interval is one half (M / 2) of the planar module (M). In addition, an opening 83b used for wiring insertion or the like is appropriately formed.

  As shown in FIG. 9, at the end of the main body 81, a protruding piece 83c is formed in which the central portion of the web 83 protrudes from the upper and lower flanges 82A and 82B. The protruding piece 83c includes a first piece 83c. A joint 85 joined to the intermediate beam 7 (or the third intermediate beam 6) is welded. The joint portion 85 has a U-shaped cross section surrounding the tip of the protruding piece 83c and the top and bottom, and is bolted in surface contact with the web 72 of the first intermediate beam 7 (or the web of the third intermediate beam 6). A contact plate portion (contact surface portion) 86 and coupling plate portions 87A and 87B which are bent at the upper and lower ends of the contact plate portion 86 and are welded to the upper and lower ends of the protruding piece 83c. As shown in FIG. 10, the pair of upper and lower coupling plate portions 87A and 87B are wedge-shaped, and a slit 87a is formed at the tip of the wedge. The joint portion 85 is mounted and welded so that the protruding piece 83c is inserted into the slit 87a.

  The height of the joint portion 85, that is, the dimension from the lower end of the coupling plate portion 87B to the upper end of the coupling plate portion 87A is determined between the upper and lower flanges 71A and 71B of the first intermediate beam 7 and the upper and lower flanges of the third intermediate beam 6. It is smaller than the dimension in between. As a result, the joining portion 85 fits between the upper and lower flanges 71A and 71B of the first intermediate beam 7 (or between the upper and lower flanges of the third intermediate beam 6), and the web 72 (or the third intermediate beam) of the first intermediate beam 7 It reaches the web 6 of the beam 6 and is bolted.

  As shown in FIG. 4 and FIG. 8, the second intermediate beams 8A and 8B have the connecting portions 84 closest to the end on the side to be connected to the third intermediate beam 6 between the studs 11C and 11D (see FIG. 2). Are joined to each other and supported at one end. The other end is supported by being joined to the first intermediate beam 7. The joint configuration between the second intermediate beam 8A and the intermediate post 11C and the joint configuration between the second intermediate beam 8B and the intermediate post 11D are both the same as the above-described joint configuration between the first intermediate beam 7 and the intermediate posts 11A and 11B. . The fourth intermediate beam 10 is made of H-shaped steel having the same cross-sectional dimensions as the first intermediate beam 7 and the second intermediate beams 8A and 8B, and the joint 84 of the second intermediate beams 8A and 8B is formed at both ends. The joint part of the same shape is provided. And this junction part is constructed by contact | abutting to the junction part 84 of the intermediate position of 2nd intermediate beam 8A, 8B, and bolt fastening.

  As shown in FIG. 11, the contact plate portion 86 of the joint portion 85 of the second intermediate beam 8 </ b> A is brought into surface contact with the web 72 of the first intermediate beam 7 and is fastened and fixed to the web 72 with a bolt V. Thus, the first intermediate beam 7 and the second intermediate beam 8A are joined to form the corner portion P of the intermediate floor beam frame 9. In the present embodiment, the corner P corresponds to the corner closest to the column 4A in the flanges 71A and 71B of the first intermediate beam 7. As described above, the first intermediate beam 7 and the second intermediate beam 8A are joined, so that the joint portion 73 of the first intermediate beam 7 and the joint portion 84 of the second intermediate beam 8A sandwich the corner portion P therebetween. It is provided at each position on both sides.

  The first intermediate beam 7 is disposed such that the center position in the width direction is separated from the first core L1 by a half (M / 2) of the planar module. Similarly, the second intermediate beam 8A is disposed such that the center position in the width direction is separated from the second core L3 by a half (M / 2) of the planar module. Although not shown in the figure, the second intermediate beam 8B is similarly disposed such that the center position in the width direction is separated from the second core L4 by a half (M / 2) of the planar module. That is, in plan view, the separation dimension d1 between the beam 5 on the first core L1 and the first intermediate beam 7 is the separation dimension d2 between the beam 5 on the second core L3 and the second intermediate beam 8A. Is equal to Further, in a plan view, the distance d3 in the lateral direction from the center position of the joint portion 73 of the first intermediate beam 7 to the corner portion P is the vertical distance from the center position of the joint portion 84 of the second intermediate beam 8A to the corner portion P. It is equal to the distance d4 in the direction.

  Since the first intermediate beam 7 and the second intermediate beam 8A are provided with the joint portion 73 and the joint portion 84 at positions on both sides of the corner portion P, respectively, any joint portion (the joint portion 73 or the joint portion) is provided. It is possible to select whether to connect the studs to the part 84). In the present embodiment, as described above, the joint portion 73 of the first intermediate beam 7 is fastened and fixed to the bracket portion 115 of the intermediate post 11A by the bolt V, but the position C facing the joint portion 84 of the second intermediate beam 8A. It is also possible to provide the intermediate column 11A and fasten and fix the joint portion 84 to the intermediate column 11A.

  When the stud 11A is installed on the beam 5 side (the position of the stud 11A in FIG. 11) on the first core L1, the first intermediate beam 7 separated from the second core L3 by a plane module (M). Are joined to the joint 73 (second joint from the end). When the stud 11A is installed on the beam 5 side (position C in FIG. 11) on the second core L3, the second intermediate beam 8A is separated from the first core L1 by a plane module (M). Joined to the portion 84 (the endmost joint). However, the position of the stud 11A and the position of the joint to which the stud 11A is joined (the joint 73 of the first intermediate beam 7 or the joint 84 of the second intermediate beam 8A) are not limited to the above. In the flange 5A of the beam 5, a plurality of joint portions (not shown) including four bolt insertion holes for joining the studs 11A at intervals of the planar module (M) can be formed. Therefore, after confirming the structural safety, an arbitrary multiple of the planar module (M) from the first core L1 or the second core L3 by using an arbitrary joint formed on the flange 5A. The spacer 11A can be installed at a position separated by a distance.

  In the present embodiment, the width of the beam 5 and the intermediate beam (the first intermediate beam 7 and the second intermediate beam 8A) is 100 mm. Further, as described above, the end portion (contact plate portion 86) in the longitudinal direction of the second intermediate beam 8 </ b> A is in surface contact with the web 72 of the first intermediate beam 7. Therefore, the empty dimension between the end portion of the beam 5 on the first core L1 (the end portion on the first intermediate beam 7 side of the flange 5A) and the end portion in the longitudinal direction of the second intermediate beam 8A is at least. 102.5 mm (152.5 (1/2 of the planar module (M))-50 mm (1/2 of the width of the beam 5)) or more. Accordingly, even when the first intermediate beam 7 is installed after the second intermediate beam 8A is installed, the second-level beam 5 and the first intermediate beam 7 do not interfere with each other, so that the intermediate beam can be easily constructed. . Specifically, the first intermediate beam 7 is lifted in a horizontal state, and then the first intermediate beam 7 is lowered so that both end portions (joint portion 73) of the first intermediate beam 7 are end portions of the second intermediate beams 8A and 8B. The first intermediate beam 7 does not interfere with the second floor beam 5 when being joined to the (abutment plate portion 86).

  Note that, by joining the first intermediate beam 7 and the second intermediate beam 8B, a corner Q similar to the above-described corner P is also formed on the column 4B side (see FIG. 2). Position where the joint part 73 of the first intermediate beam 7 and the joint part 84 of the second intermediate beam 8B are on both sides of the corner Q by connecting the first intermediate beam 7 and the second intermediate beam 8B. Are provided respectively. That is, it is possible to select which of the joints 73 and 84 on both sides of the corner Q to connect the stud 11B to (joint 73 or joint 84).

  As shown in FIGS. 2 and 12, a floor board B is laid on the first intermediate beam 7, the second intermediate beams 8A and 8B, the third intermediate beam 6, and the fourth intermediate beam 10, and the intermediate floor F3. Is formed. On the upper surface of the upper flange 82A of the second intermediate beam 8A on the side where the floor plate is not placed, a mortar receiver 22 that is a long member having an L-shaped cross section is fixed along the longitudinal direction of the second intermediate beam 8A. A mortar 23 is filled between the edge of the floor board B and the mortar receptacle 22. On the floor board B, a sound insulation mat 24, a gypsum board 25, a vertical board 26, and a parquet plywood 27 are installed in this order to form a floor finishing layer 28. A field edge 30 is fixed to the lower surface of the lower flange 82B of the second intermediate beam 8A via a bracket 29, and a ceiling material 31 such as a plaster board is attached to the lower surface of the field edge 30. A ceiling 32 is formed.

  The beam 5 in FIG. 2 is arranged on the outer peripheral part of the building and is in contact with the outer peripheral wall 38. The outer peripheral wall 38 has an outer wall material 36 that is continuously erected from the first floor to the second floor along the exterior side of the beam 5 and an interior that is made of a plaster boat or the like and is finished with a vinyl cloth or the like on the surface. Wall material 34A (interior wall material of intermediate floor space S1) and 34B (interior wall material of low ceiling space S4) are provided. A wall space S6 is secured between the outer wall member 36 and the interior wall members 34A and 34B. A heat insulating material 35 made of a plate-like foamed resin is continuously disposed along the inner surface of the outer wall member 36 using the wall space S6. Even in the state in which the heat insulating material 35 is disposed, the wall space S6 communicates in the vertical direction without being divided at the position of the intermediate floor F3. The lower end of the interior wall material 34A is in contact with the floor finishing layer 28, and the upper end of the interior wall material 34B is continuous with the ceiling 32. Further, the floor board B constituting the intermediate floor F3 is separated from the outer wall material 36. The ceiling pocket space S5 between the ceiling 32 and the intermediate floor F3 is the wall space S6 through the opening 83b of the second intermediate beam 8A and the gap between the lower flange 82B of the second intermediate beam 8A and the ceiling 32. Communicated with. Using this connected wall space S6 and ceiling pocket space S5, wiring and piping can be easily inserted in the direction of the intermediate floor F3.

  Next, a method for constructing a frame including a method for forming the intermediate floor F3 in the building 1 will be described. When forming the intermediate floor F3, (1) a foundation including the foundation beam 37 is constructed along the core including the first cores L1 and L2 and the second cores L3 and L4. (2) A column including columns 4A to 4D is erected at an intersection of the foundation beams 37, that is, a predetermined core intersection including the intersections of the first cores L1 and L2 and the second cores L3 and L4. . (3) Two intermediate columns 11A and 11B are provided upright on the first core L1 and at positions different from the columns 4A and 4B around the floorless area A2. The standing positions of the intermediate pillars 11A and 11B are positions corresponding to the joint portions 73 of the first intermediate beam 7 to be erected. Specifically, the standing positions of the studs 11 </ b> A and 11 </ b> B standing on the first core L <b> 1 are positions corresponding to both end portions of the first intermediate beam 7. (4) One of the pillars 11C and 11D is provided upright on the pair of second cores L3 and L4 and at positions different from the pillars 4A to 4D around the floorless area A2. Specifically, the standing positions of the studs 11C and 11D that are erected on the second cores L3 and L4 are at the end portions of the second intermediate beams 8A and 8B on the side of the blow-through portion S2 and the staircase S3. Corresponding position.

  (5) The beam 5 is installed between adjacent columns 4A to 4D, and the upper ends of the columns 11A to 11D are fastened and fixed to the beam 5 with bolts. (6) The first intermediate beam 7 is installed on the pillars 11A and 11B on the first core L1. Specifically, the first intermediate beam 7 is lifted, the joint portion 73 is abutted against the bracket portion 115 provided on the intermediate pillars 11A and 11B, and is fastened and fixed by bolts.

  (7) A pair of second intermediate beams 8A and 8B are installed between the first intermediate beam 7 and the columns 11C and 11D on the pair of second cores L3 and L4. Specifically, first, the second intermediate beam 8A is lifted, the joint portion 84 is abutted against the bracket portion 115 of the intermediate post 11C, and is fastened and fixed by a bolt, and the second intermediate beam 8A is The second intermediate beam 8A is constructed by abutting and fastening the joining portion 85 of the intermediate beam 8A. Similarly, the second intermediate beam 8B is lifted, the joint portion 84 is abutted against the bracket portion 115 of the intermediate post 11D, and is fastened and fixed by a bolt, and the second intermediate beam 8B is fixed to the other end portion of the first intermediate beam 7. The second intermediate beam 8B is installed by abutting the joint portion 85 and fastening the bolt.

  (8) The third intermediate beam 6 is installed between the ends of the pair of second intermediate beams 8A and 8B facing each other (ends on the side of the blow-through portion S2 and the staircase S3). Specifically, the third intermediate beam 6 is installed by lifting the third intermediate beam 6 and abutting the joint portions 85 of the second intermediate beams 8A and 8B to both ends of the third intermediate beam 6 and fastening with bolts. To do. When the third intermediate beam 6 is installed, a substantially rectangular intermediate floor beam frame 9 is formed.

  An intermediate floor F3 is formed by appropriately laying a floor board B on the intermediate floor beam frame 9. Further, a floor finishing layer 28 is provided on the intermediate floor F3, and a ceiling 32 is provided below the intermediate floor F3 to form the intermediate floor F3.

  For example, consider a case in which a large opening, a vibration control device, or the like is to be provided in a space overlapping with the beam 5 (the beam 5 between the column 4A and the column 4D) of the second intermediate beam 8A in the vertical direction. In the above-described support structure for the intermediate floor, in such a case, the intermediate pillar 11A is provided not on the joint portion 84 side (position C) of the second intermediate beam 8A but on the joint portion 73 side of the first intermediate beam 7, The joining portion 73 can be joined to the inter-column 11A.

  On the other hand, for example, after the construction of the building 1 or the like, when the intermediary column 11A is already provided on the joint 73 side of the first intermediate beam 7, and the intermediary column 11A is in the way of renovation, the intermediary column 11A is replaced. Can be easily performed. That is, after changing the arrangement of the stud 11A to the position C facing the joint 84 of the second intermediate beam 8A, the joint 84 can be joined to the stud (the pillar 11A provided at the position C by the placement change). it can.

  Thus, according to the support structure of the intermediate floor, the arrangement of the studs for providing the intermediate floor can be flexibly designed, and therefore, in the case of providing the intermediate floor, the degree of freedom of design and installation work can be improved. it can. Further, in a plan view, the distance between the beam 5 on the first core L1 and the first intermediate beam 7 is equal to the distance between the beam 5 on the second core L3 and the second intermediate beam 8A. Therefore, it is possible to share the studs in the case where the studs are joined to the joint 73 of the first intermediate beam 7 and the joints are joined to the joint 84 of the second intermediate beam 8A.

  Further, since the web 72 of the first intermediate beam 7 and the web 83 of the second intermediate beam 8A are firmly fixed via the contact plate portion 86 of the second intermediate beam 8A, the first intermediate beam 7 and the second intermediate beam 7 The load can be smoothly transmitted to and from the intermediate beam 8A. As a result, there is a difference in the support strength of the intermediate floor F3 between the case where the stud is connected to the joint 73 of the first intermediate beam 7 and the case where the stud is connected to the joint 84 of the second intermediate beam 8A. Can be suppressed more effectively.

  The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above embodiment. For example, in the present embodiment, the intermediate pillars 11A to 11D that are fixed to the beams (the beam 5 and the foundation beam 37) at both the lower end and the upper end are described as the intermediate beam support means. A pillar member fixed to one of the beams on the floor may be used. Further, the installation positions and the number of the studs are not limited to the form of the present embodiment, and the intermediate beams are supported by the three studs so that the intermediate floor beam frame 9 can be supported more safely from the structure. You may do it.

  Further, the size and aspect ratio of the floorless area A2 and the intermediate floor F3 are not limited to those shown in the present embodiment. For example, the intermediate floor F3 may be formed in the entire floorless area A2. Further, the number of the fourth intermediate beams 10 and the installation direction are not limited to the aspect of this embodiment. For example, a plurality of fourth intermediate beams may be provided according to the length of the first intermediate beam 7, the second intermediate beams 8A and 8B, and the third intermediate beam 6, the dimensions of the floor plate B to be used, the structural safety, and the like. Alternatively, the fourth intermediate beam may not be provided at all. Further, the fourth intermediate beam may be installed so as to be supported by the first intermediate beam 7A and the third intermediate beam 6.

  DESCRIPTION OF SYMBOLS 1 ... Building, 4A, 4B, 4C, 4D ... Column, 5 ... Beam, 7 ... 1st intermediate beam, 8A, 8B ... 2nd intermediate beam, 9 ... Intermediate floor floor beam frame, 11A, 11B, 11C, 11D ... Spacer (support means), 71A, 71B, 82A, 82B ... flange, 72, 83 ... web, 73, 84, 85 ... joint, 74 ... general part, 86 ... contact plate part (contact surface part), 111 ... Body part 115 ... Bracket part 117 ... Vertical surface part B ... Floor board F3 ... Middle floor L1, L2 ... First core, L3, L4 ... Second core, P, Q ... Corner S ... floor opening, S1 ... intermediate floor space.

Claims (6)

A plurality of first cores that are parallel to each other and a column that is erected at intersections of a plurality of second cores that are parallel to each other and perpendicular to the first core; A support structure for an intermediate floor in a multi-storey building comprising a core or a beam disposed between adjacent pillars on the second core and a floor supported by the beam. There,
On a predetermined floor excluding the first floor and the rooftop floor, a floor area where the floor is laid and a rectangular floor area where the floor is not laid are formed,
The beam defining the floorless area is arranged on the four circumferences of the floorless area,
In the inside of the floorless region, in plan view, along the beam defining the floorless region, at a position lower than the beam defining the floorless region and higher than the beam on the lower floor, An intermediate floor floor beam frame is provided, and the floor material constituting the intermediate floor is supported by the intermediate floor beam frame.
Each beam that defines the floorless region is provided with a joint portion in which a bolt hole is formed for joining a stud that supports the intermediate floor beam frame ,
Before Symbol intermediate floor beam frame, a first intermediate beam along said first grids, together along the second grids, and the second intermediate beams to be joined to said first intermediate beam, said first A corner formed by joining the first intermediate beam and the second intermediate beam;
The studs define, in the vicinity of the corner, between the beam on the first grid that defines the floorless region and a beam on the lower floor immediately below, or the floorless region. It is erected between the beam on the second core and the beam on the lower floor immediately below it, and is joined to the beam that defines the floorless region via the joint. ,
At the positions on both sides of the corners of the first intermediate beam and the second intermediate beam, there are provided joint portions in which bolt holes are formed for joining to the studs by bolt fastening. ,
The intermediate floor beam frame is joined to the stud via either one of the joint portion of the first intermediate beam and the joint portion of the second intermediate beam provided across the corner portion. Characteristic support structure for the middle floor. A plurality of joints of the beam, the joint of the first intermediate beam, and the joint of the second intermediate beam that define the floorless region are provided along the extending direction of each beam;
The intermediate floor support structure according to claim 1. The multi-storey building has a predetermined plane module;
The separation dimension between the plurality of first cores and the separation dimension between the plurality of second cores are integer multiples of the planar module,
The separation dimension between the beam on the first core and the first intermediate beam, and the separation dimension between the beam and the second intermediate beam on the second core are two parts of the planar module. 1
The support structure for an intermediate floor according to claim 1 or 2. The joint portion of the beam, the joint portion of the first intermediate beam, and the joint portion of the second intermediate beam that define the floorless region are provided based on the planar module.
The support structure for an intermediate floor according to claim 3.   The distance between the beam on the first core and the first intermediate beam in plan view is equal to the distance between the beam on the second core and the second intermediate beam. The support structure of the intermediate floor according to any one of claims 1 to 4. The first intermediate beam and the second intermediate beam are H-shaped steel formed by joining a pair of upper and lower flanges with a web,
One intermediate beam of the first intermediate beam and the second intermediate beam has a joint formed integrally with the web of the one intermediate beam at the end,
The joint has an abutting surface portion in surface contact with the web of the other intermediate beam,
The intermediate floor support structure according to any one of claims 1 to 5, wherein the corner portion is formed by fastening and fixing the contact surface portion to a web of the other intermediate beam. .

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