JP6027341B2 - Floor support structure - Google Patents

Description

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

  For steel-frame buildings, slabs can be built by using a cast-in-place frame method using a deck plate or a precast concrete plate such as an ALC plate between the beams, and filling these gaps with mortar, etc. Are known. In addition, there is also a known construction method in which piping and wiring of facilities are performed on the floor side instead of the ceiling side for ease of construction, building design, and planning. As such a construction method, a free access floor construction method (double floor construction method) It has been known.

  As a method of constructing a free access floor for the slab of a steel structure building, for example, as shown in Patent Document 1, a precast concrete plate is installed between steel beams, and a number of support legs are mounted on the precast concrete plate. A general construction method is to stand up and lay a free access floor panel on the support leg.

Japanese Patent Laid-Open No. 06-229043

  However, in the structure of the above-mentioned patent document 1, since it is a construction method in which a support leg is installed on a slab made of a precast concrete plate to form a free access floor, the size from the lowest end of the steel beam to the upper surface of the floor is large. turn into. Therefore, there is a problem that the ceiling height of the floor on which the free access floor is formed is narrowed or the floor height of the building is increased to secure the ceiling height of the floor. In order to solve such a problem, it is conceivable to reduce the height of the support leg. However, in that case, there is a possibility that the size of the pocket becomes small and a desired piping and wiring space cannot be secured.

  The present invention has been made to solve such a problem, and provides a floor support structure capable of securing a sufficient underfloor space while ensuring a ceiling height of a floor employing a double floor. For the purpose.

  A floor support structure according to the present invention includes a plate-like floor slab and a pair of beams formed by different beams that support the floor slab, and each beam connects a pair of upper and lower flanges with a web. The pair of beams are provided with their lower end surfaces positioned at the same height, and the floor slab is supported by the lower flange of each beam over the pair of beams. A first floor portion is formed, and a support member that protrudes to a position that is at least the same height as the upper end surface of the highest beam or higher than the upper end surface is installed on the first floor portion, and the support member A double floor in which a second floor is formed above the first floor is formed by supporting the floor.

  According to the floor support structure of the present invention, the height of the underfloor space that is the space between the first floor portion formed by the floor slab and the second floor portion formed by the floor is set to the highest level. It can be secured to the extent of a large beam, and sufficient wiring space can be secured. In addition, since the underfloor space is provided at the height position where the beam is installed in this way, the height position of the upper end portion of the support member that supports the placing floor is the same as or slightly the upper end surface of the highest beam. The height may be high, and the second floor portion is as high as the upper end surface of the beam having the highest beam by supporting the placing floor on the support member. Accordingly, the ceiling height of the room (floor) above the floor support structure can be designed to be higher by that amount. Or it becomes the thing which can suppress the height as the whole building low by setting it as the structure which provides underfloor space between beams.

  In the floor support structure according to the present invention, it is preferable that the floor slab is installed in a state of being placed on the upper surface of the lower flange of each beam. According to this, since the floor slab can be placed on the upper surface of the lower flange of the beam, a configuration in which the floor slab is supported by the lower end portion of the beam can be formed very easily. Further, if the heights of the beams are different from each other, the floor slab can be obliquely inserted between the beams from the beam side with the smaller beam, thereby facilitating the installation of the floor slab between the beams.

  In the floor support structure according to the present invention, the lower flange of each beam is provided with a floor receiving member that protrudes toward the opposite beam, and the floor slab has two opposite edges supported by the pair of beams. The distance between them is formed to be smaller than the distance between the edges of the pair of beams, and the opposite one edge is supported by the floor receiving member of one beam and the other opposite It is preferable that the edge of is supported by the floor receiving member of the other beam. According to this, a floor slab can be installed on the floor receiving member which protrudes from each beam by dropping a floor slab straight between beams, and construction is facilitated.

  Further, in the floor support structure according to the present invention, it is preferable that the beam and the floor slab are connected by filling the gap between the beam web and the floor slab with mortar. According to this, the connection strength between the beam and the floor slab can be increased, and vibration (horizontal movement) of the floor slab accompanying an earthquake or the like can be remarkably restricted.

  Further, in the floor support structure according to the present invention, a concave portion is formed on one side edge portion of one floor slab, and the other side edge portion of the floor slab adjacent to the one floor slab faces the concave portion. It is preferable that a concave portion is formed, and a cotter that enables transmission of shearing force between the floor slabs is embedded in the opposing concave portion. According to this, a shearing force can be transmitted between adjacent floor slabs, and a plurality of floor slabs can be integrated, so that rigidity as a floor slab material can be increased. is there.

  Further, in the floor support structure according to the present invention, the floor slab is connected to the linear restraint material constructed between the pair of beams and one end of the linear restraint material supported by the lower flange of one of the beams. It is preferably fixed to the beam by a rigid floor mechanism comprising one fixed hardware and the other fixed hardware supported by the lower flange of the other beam and connecting the other end of the linear restraint material. . According to this, the degree of fixation between the floor slab and the beam can be further increased, and the horizontal rigidity of the floor slab can be increased, thereby increasing the rigidity of the entire floor composed of the floor slab and the beam. It is a thing.

  ADVANTAGE OF THE INVENTION According to this invention, sufficient underfloor space can be ensured, ensuring the ceiling height of the floor which employ | adopts a double floor.

1 is a perspective view of a building to which a floor support structure according to an embodiment of the present invention is applied. It is sectional drawing which shows the 2nd floor part of the building of FIG. It is sectional drawing of the floor support structure which concerns on embodiment of this invention. It is sectional drawing of the floor support structure which concerns on a modification. It is sectional drawing of the floor support structure which concerns on a modification. It is the figure which looked at the floor slab of the floor support structure shown in FIG. 5 from the upper part. It is sectional drawing for demonstrating the installation method of a floor slab.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

(Overall structure of the building)
As shown in FIGS. 1 and 2, a building 1 to which a floor structure according to an embodiment of the present invention is applied is a three-story residential building, which is a structural housing composed of beams 3 </ b> A and 3 </ b> B and columns 4. 2 (see FIG. 2), the floors 5A, 5B, and 5C that are supported by the beams 3A and 3B, the pillars 4 and the like to form the floors of the respective floors, and the beams 3A and 3B and the pillars 4 and the like A roof portion 6 that forms one roof and an outer wall 8 that is supported by the beams 3A and 3B, the pillars 4 and the like to form the outer skin of the building 1 are provided. In addition, in the building 1 according to the present embodiment, there is a place where the small beam 3Z is provided at an appropriate place.

  The structural frame 2 constitutes a so-called ramen structure comprising a plurality of (four in this embodiment) columns 4 rising from the foundation and a plurality of beams 3A and 3B installed between the adjacent columns 4. doing.

  The pillar 4 according to the present embodiment extends from the lower part of the first floor to the upper part of the third floor of the building 1, and has a beam joint set at a predetermined height to form each floor, and a beam joint from the end. And a general part composed of a long part communicating between the upper and lower beam joints. The general part is formed of a known square steel pipe. Further, the beam joint portion has a height similar to that of the beams 3A and 3B (the height from the lower end to the upper end of the beams 3A and 3B) and is formed in a rectangular tube shape.

  The beams 3 </ b> A and 3 </ b> B are in surface contact with a beam main body formed of H-shaped steel formed by connecting the central portions of a pair of upper and lower flanges with a web, and both ends of the beam main body and the beam joint of the column 4. And an end plate. The beams 3 </ b> A and 3 </ b> B are appropriately bolted with the end plate in surface contact with the beam joint.

  The floor portion 5A on the first floor is formed by laying a plurality of floor slabs made of lightweight cellular concrete (ALC) having a predetermined size on a foundation. The floors 5B and 5C on the second and third floors are structurally integrated with a plurality of floor slabs 5a made of lightweight cellular concrete and having a predetermined size, and the plurality of floor slabs 5a. And a plurality of floor slabs 5a are appropriately supported by the beams 3A and 3B.

  The roof part 6 (refer FIG. 1) is provided with the several roof panel 6a made from the lightweight cellular concrete formed in a predetermined dimension. Moreover, as the roof part 6, two types of modes of a land roof part 6 </ b> A in which a roof panel 6 a is laid horizontally and an inclined roof part 6 </ b> B that connects the land roof part 6 </ b> A and the outer wall 8 of the building 1 are provided. Yes.

  The outer wall 8 is generally formed by a plurality of lightweight cellular concrete outer wall panels 9A and 9B having a predetermined size, and each of the outer wall panels 9A and 9B has upper and lower ends by a so-called locking method (also referred to as “locking mechanism”). The part is held on the beams 3A and 3B or on the beams 3A and 3B and the foundation. Further, a heat insulating material is provided inside the outer wall panels 9A and 9B, and an interior base for supporting the interior material is provided inside the heat insulating material.

  Next, the floor support structure 100 according to the embodiment of the present invention will be described in detail. In the building 1 described above, the floor support structure 100 is applied to, for example, the second or third floor. As shown in FIG. 3, the floor support structure 100 includes a first floor portion 20 formed by plate-like floor slabs 10A and 10B, beams 30A, 30B, and 30C that support the floor slabs 10A and 10B, Support members 40A and 40B installed on the first floor 20, a ceiling 50 provided below the beams 30A, 30B and 30C, and a second floor formed above the beams 30A, 30B and 30C Part 60. Thus, in the floor support structure 100, the double floor is formed by including the first floor portion 20 and the second floor portion 60. The beams 30A, 30B, and 30C of the floor support structure 100 are beams formed by different beams. Thus, the floor support structure 100 comprised of beams of different beams is applied, for example, when a region where high structural strength is desired and a region where high structural strength is not required are adjacent to each other in the same floor. In other words, the strength of the beam is increased by applying a large beam to the area where high structural strength is ensured, and the weight of the member is reduced by applying a small beam to the area where high strength is not required. Can be lightened. Note that FIG. 3 is a diagram in which the interval between the beams is reduced in order to facilitate understanding of the configuration of the present invention, and the interval is slightly different from the actual interval. The same applies to FIGS. 4 to 7 described later.

  The beams 30 </ b> A, 30 </ b> B, and 30 </ b> C are formed as H-shaped steel formed by connecting a pair of upper and lower flanges 31 and 32 with a web 33. In the drawing, the beams 30A, 30B, and 30C are arranged in the order of the beam 30A, the beam 30B, and the beam 30C from the left side to the right side in the horizontal direction of the drawing. The beams 30A, 30B, and 30C are installed between columns (column 4 in FIGS. 1 to 3). Alternatively, the beams 30A, 30B, and 30C may be installed between other beams. The beam 30A is formed with a beam length smaller than that of the central beam 30B. The beam 30C is formed with a beam length larger than that of the central beam 30B. The beam is defined by the dimension between the upper end surface 30a (corresponding to the upper surface of the upper flange 31) and the lower end surface 30b (corresponding to the lower surface of the lower flange 32) of the beams 30A, 30B, 30C. For example, a beam having a standard size applied to the building 1 is applied as the beam 30B, a beam having a smaller beam size than the beam according to the standard size is applied as the beam 30A, and a standard size is applied as the beam 30C. It is possible to apply a beam that is larger than the beam.

  The beam 30A is installed with its lower end surface 30b at the same height as the lower end surface 30b of the central beam 30B. The upper end surface 30a of the beam 30A is disposed at a position lower than the upper end surface 30a of the central beam 30B. The beam 30C is installed with its lower end surface 30b at the same height as the lower end surface 30b of the central beam 30B. The upper end surface 30a of the beam 30C is disposed at a position higher than the upper end surface 30a of the central beam 30B.

  A ceiling 50 is provided for the lower end surface 30b of the beam 30A, the lower end surface 30b of the reference beam 30B, and the lower end surface 30b of the beam 30C set at the same height position. The ceiling part 50 includes a ceiling hanging object 51, a ceiling base 52, and a ceiling 53. Specifically, a ceiling hanger 51 is provided on the lower end surface 30b of each beam 30A, 30B, 30C, a ceiling base 52 is provided on the lower surface of the ceiling hanger 51, and a ceiling 53 is provided on the lower surface of the ceiling base 52. It is formed. Since the lower end surface 30b of each beam 30A, 30B, 30C is set at the same height position, the lower end surface of the ceiling base 52 is attached by attaching the ceiling hanging object 51 and the ceiling base 52 of the same standard to each beam. The ceiling part 50 which becomes the same height position and is fixed to the lower end surface of the ceiling base 52 is in a horizontal state.

  The first floor portion 20 is formed by being supported by the lower flange 32 of the beams 30A, 30B, and 30C. The first floor 20 includes a floor slab 10A supported by the lower flange 32 of the beams 30A and 30B across the beams 30A and 30B, and a lower flange 32 of the beams 30B and 30C across the beams 30B and 30C. The floor slab 10B is supported and the fillers 21, 22, and 23 filled around the floor slabs 10A and 10B. Specifically, the floor slab 10A is horizontally installed between the beam 30A and the beam 30B, and the floor slab 10A has one end on the side edge 10c side on the upper surface 32a of the lower flange 32 of the beam 30B. The lower surface 10b of the beam 30A is supported, and the lower surface 10b of the other end on the side edge 10d side is supported by the upper surface 32a of the lower flange 32 of the beam 30A. The floor slab 10B is supported by the upper surface 32a of the lower flange 32 of the beam 30B on the lower surface 10b of one end on the side edge 10c side, and the other surface on the side edge 10d side of the upper surface 32a of the lower flange 32 of the beam 30C. The lower surface 10b at the end is supported.

  The length of the floor slab 10A (the dimension between the side edge 10c and the side edge 10d) is the dimension between the opposite end edges 32b of the lower flange 32 of the beam 30A and the lower flange 32 of the beam 30B (upper flange). 31 is equal to the dimension between the opposing end edges 31b) and smaller than the dimension between the web 33 of the beam 30A and the web 33 of the beam 30B. The length of the floor slab 10B (the dimension between the side edge 10c and the side edge 10d) is the dimension between the opposite end edges 32b of the lower flange 32 of the beam 30C and the lower flange 32 of the beam 30B (upper flange). 31 is equal to the dimension between the opposite end edges 31b) and smaller than the dimension between the web 33 of the beam 30C and the web 33 of the beam 30B. For example, as shown in FIG. 7A, when the length of the floor slab 10A is L1, and the dimension between the opposite edges 31b of the upper flange 31 of the beam 30A and the upper flange 31 of the beam 30B is L2, The relationship L2 <L1 is established.

  On the upper side of the upper surface 32a of the lower flange 32 of the beam 30A, the filler 21 is filled between the side edge 10d of the floor slab 10A and the web 33 of the beam 30A. Further, on the upper side of the upper surface 32a of the lower flange 32 of the beam 30B, between the side edge 10c of the floor slab 10A and the web 33 of the beam 30B, and between the side edge 10c of the floor slab 10B and the web 33 of the beam 30B, In between, the filler 22 is filled. In addition, on the upper side of the upper surface 32a of the lower flange 32 of the beam 30C, the filler 23 is filled between the side edge 10d of the floor slab 10B and the web 33 of the beam 30C. As the fillers 21, 22, and 23, mortar is used.

  The first floor 20 is provided with support members 40A and 40B that protrude at least to the same height as the upper end surface 30a of the highest beam 30C. Specifically, the support members 40 </ b> A and 40 </ b> B are configured by a bundle that supports the second floor portion 60, and are provided on the upper plate 41 that supports the second floor portion 60 and the first floor portion 20. And a column portion 43 that extends in the vertical direction and connects the upper plate 41 and the lower plate 42 to each other. The lower end surface 40b of the lower plate 42 is placed on the floor slab 10A, and the upper end surface (upper end portion) 40a of the upper plate 41 has the same height as the upper end surface 30a of the highest beam 30C. Is arranged. The support member 40B is arranged such that the lower end surface 40b of the lower plate 42 is placed on the floor slab 10B, and the upper end surface 40a of the upper plate 41 is the same height as the upper end surface 30a of the highest beam 30C. Yes. Note that the upper end surfaces 40a of the support members 40A and 40B may protrude to a position higher than the upper end surface 30a of the beam 30C.

  The second floor portion 60 is formed above the first floor portion 20 by supporting the placement floor 61 with the support members 40A and 40B. The lower surface 61a of the placement floor 61 is placed on the upper end surface 40a of the upper plate 41 of the support members 40A and 40B. In the present embodiment, the lower surface 61a of the placing floor 61 is also placed on the upper end surface 30a of the highest beam 30C. However, when the upper end surface 40a of the support members 40A and 40B protrudes to a position higher than the upper end surface 30a of the beam 30C, the upper end surface 30a of the beam 30C is separated from the lower surface 61a of the floor 61. The upper end surfaces 30a of the beams 30A and 30B, which are smaller than the beam 30C, are separated from the lower surface 61a of the floor 61.

  Next, operations and effects of the floor support structure 100 according to the present embodiment will be described.

  According to the floor support structure 100 according to the present embodiment, an underfloor space that is a space between the first floor portion 20 formed by the floor slabs 10A and 10B and the second floor portion 60 formed by the floor 61. The height of the SP can be secured to the extent of the beam 30C having the largest beam, and a sufficient wiring space can be secured. Further, since the underfloor space SP is provided at the height position where the beams 30A, 30B, and 30C are constructed in this way, the height position of the upper end surface 40a of the support members 40A and 40B that support the placing floor 61 is the most. It may be the same as the upper end surface 30a of the high beam 30C (however, if the support members 40A and 40B protrude above the upper end surface 30a of the beam 30C, it may be slightly higher) and placed on the support members 40A and 40B. By supporting 61, the said 2nd floor part 60 becomes the height of the upper end surface 30a of the beam 30C where the beam is the highest. Accordingly, the ceiling height of the room (floor) above the floor support structure 100 can be designed to be higher by that amount. Alternatively, the height of the entire building 1 can be kept low by adopting a configuration in which the underfloor space SP is provided between the beams.

  Further, in the floor support structure 100 according to the present embodiment, the floor slabs 10A and 10B are installed in a state of being placed on the upper surface 32a of the lower flange 32 of each beam 30A, 30B, and 30C. According to this, since the floor slabs 10A and 10B can be placed on the upper surface 32a of the lower flange 32 of the beams 30A, 30B and 30C, the floor slabs 10A and 10B can be very easily formed at the lower ends of the beams 30A, 30B and 30C. The structure which supports 10B can be formed.

  In addition, the ceiling portion 50 supported by each beam via the ceiling foundation 52 is also supported by each beam via the ceiling suspension 51 and the ceiling foundation 52 of the same standard, and vibrations such as during an earthquake occur. Even so, the natural period of any ceiling part 50 is the same regardless of the part (area), so that the ceiling part 50 can vibrate uniformly and local destruction can be avoided. .

  Further, if the heights of the beams 30A, 30B, and 30C are different from each other, the floor slabs 10A and 10B can be obliquely inserted between the beams, and thereby the floor slabs 10A and 10B can be easily inserted between the beams. . For example, in FIG. 7 (a), when the beam of the beam 30A is the same as the beam 30B, the length L1 is larger than the dimension L2 between the end edges 31b of the upper flange 31 as shown by the phantom line. When the floor slab 10A is placed between the beams 30A and 30B, the floor slab 10A needs to be greatly inclined so as not to interfere with the upper flange 31 of the beam 30A and the upper flange 31 of the beam 30B. It becomes difficult. On the other hand, when the height position of the upper end surface 30a of the beam 30A is lower than the upper end surface 30a of the beam 30B as in this embodiment, the beam 30A can be inserted between the beams 30A and 30B even if the inclination of the floor slab 10A is reduced. Therefore, the work can be easily performed. Further, when the difference in height between the beams 30A and 30B is larger than the thickness of the floor slab 10A, the floor slab 10A is horizontally oriented from the beam 30A having a small beam to the beam 30B having a large beam. The floor slab 10A can be installed between these beams while being fed into the beam, and the work efficiency and safety of the floor slab installation can be further improved.

  In the floor support structure 100 according to the present embodiment, the gaps between the webs 33 of the beams 30A, 30B, and 30C and the floor slabs 10A and 10B are filled with the fillers 21, 22, and 23 made of mortar. The beams 30A, 30B, and 30C are connected to the floor slabs 10A and 10B. According to this, it is possible to increase the connection strength between the beams 30A, 30B, 30C and the floor slabs 10A, 10B, and to remarkably regulate the vibration (horizontal movement) of the floor slabs 10A, 10B due to an earthquake or the like. Will be able to.

  The present invention is not limited to the embodiment described above.

  In the above-described embodiment, an example of a floor support structure having beams with different beams was shown, but the order, type, and number of beams are not particularly limited. For example, in the above-described embodiment, the beams related to three types of heights are used, but only beams related to two types of heights may be used, or beams related to four or more types of heights may be used. Further, the floor receiving member can be provided not only on both beams but also on only one of the beams.

  Moreover, you may employ | adopt the floor support structure 200 which concerns on FIG. In the floor support structure 200 shown in FIG. 4, a floor receiving member 70 is provided on the lower flange 32 of each beam 30A, 30B, 30C. The floor receiving member 70 is a plate-like member extending along the extending direction of each beam 30A, 30B, 30C. A floor receiving member 70 that protrudes toward the facing beam 30B is provided on the upper surface 32a of the portion of the lower flange 32 of the beam 30A that protrudes toward the facing beam 30B. A floor receiving member 70 that protrudes toward the facing beam 30A is provided on the upper surface 32a of the portion of the lower flange 32 of the beam 30B that protrudes toward the facing beam 30A. A floor receiving member 70 that protrudes toward the facing beam 30B is provided on the upper surface 32a of the portion of the lower flange 32 of the beam 30C that protrudes toward the facing beam 30B. On the upper surface 32a of the portion of the lower flange 32 of the beam 30B that protrudes toward the opposing beam 30C, a floor receiving member 70 that protrudes toward the opposing beam 30C is provided.

  Further, in the floor support structure 200 shown in FIG. 4, the floor slab 10A has a distance between two opposite edges supported by the beams 30A and 30B, that is, a side edge (edge) 10c and a side edge (edge). 10d is smaller than the distance between the opposing edges of the beams 30A and 30B (between the edges 31b of the upper flange 31 or between the edges 32b of the lower flange 32), and the web 33 of the beam 30A It is formed in a dimension larger than the dimension between the web 33 of the beam 30B. Further, the floor slab 10A is supported by the floor receiving member 70 of one beam 30B at one side edge portion 10c facing the floor slab 10A, and the floor receiving member 70 of the other beam 30A is supported by the other side edge portion 10d opposite to the floor slab 10A. It is supported. Further, the floor slab 10B has a distance between two opposing edges supported by the beams 30C and 30B, that is, a dimension between the side edge (end edge) 10c and the side edge (end edge) 10d. , 30B is smaller than the distance between the opposing edges (between the edge 31b of the upper flange 31 or between the edges 32b of the lower flange 32), and the dimension between the web 33 of the beam 30C and the web 33 of the beam 30B. It is formed in a larger dimension. Further, in the floor slab 10B, one side edge portion 10c facing each other is supported by the floor receiving member 70 of one beam 30B, and the other side edge portion 10d facing each other is a floor receiving member 70 of the other beam 30C. It is supported. For example, as shown in FIG. 7B, when the length of the floor slab 10A is L1, and the dimension between the opposite end edges 31b of the upper flange 31 of the beam 30A and the upper flange 31 of the beam 30B is L2, The relationship L2> L1 is established.

  According to such a configuration of the floor support structure 200, the floor slab 10A can be installed on the floor receiving member 70 protruding from the beams 30A, 30B by dropping the floor slab 10A straight between the beams 30A, 30B. By dropping the floor slab 10B straightly between the beams 30C and 30B, the floor slab 10B can be installed on the floor receiving member 70 protruding from the beams 30C and 30B, thereby facilitating the construction. For example, as shown in FIG. 7B, since the length dimension L1 of the floor slab 10A is smaller than the dimension L2 between the opposite end edges 31b of the upper flange 31 of the beam 30A and the upper flange 31 of the beam 30B, The slab 10A can be inserted between the beams 30A and 30B by being dropped straight without being inclined. The floor slab 10 </ b> A dropped between these beams is supported by each floor receiving member 70. This facilitates construction when installing the floor slab 10A, and also improves installation safety.

  Moreover, you may employ | adopt the floor support structure 300 which concerns on FIG. In the floor support structure 300 shown in FIG. 5, a structure for increasing the rigidity of the first floor portion 20 is employed. Specifically, as shown in FIGS. 5 and 6A, the floor slabs 10 </ b> A and 10 </ b> B are fixed to the beams 30 </ b> A, 30 </ b> B, and 30 </ b> C by the rigid floor mechanism 80. The rigid floor mechanism 80 provided for the floor slab 10A is provided on the linear restraint member 82 installed between the beams 30A and 30B and the floor receiving member 70 on the lower flange 32 of the beam 30A. A fixed hardware 81 for connecting the end of the beam 30A on the side of the beam 30A, and a fixed hardware 81 provided on the floor receiving member 70 on the lower flange 32 of the beam 30B for connecting the end of the linear restraint material 82 on the side of the beam 30B. And. The rigid floor mechanism 80 provided for the floor slab 10B is provided on the linear restraint member 82 laid between the beams 30C and 30B and the floor support member 70 on the lower flange 32 of the beam 30C. The fixed hardware 81 for connecting the end of the beam 30C on the side of the beam 30C and the fixed hardware 81 provided on the floor receiving member 70 on the lower flange 32 of the beam 30B for connecting the end of the linear restraint material 82 on the side of the beam 30B. And.

  Specifically, as shown in FIG. 6A, the side edge portions 10e in the width direction of the floor slabs 10A and 10B are abutted with the side edge portions 10e of other floor slabs 10A and 10B adjacent in the width direction. Each side edge portion 10e is provided with a notch along the upper surface 10a side so that a groove for arranging the linear restraint material 82 is formed in each side edge portion 10e. A linear restraint member 82 is disposed in the groove. In addition, a concave portion for arranging the fixed hardware 81 is formed in each side edge portion 10c in a portion where each side edge portion 10e is abutted, and a concave portion for arranging the fixed hardware 81 is formed in each side edge portion 10d. Is formed. Each fixed hardware 81 is arranged in the recess. The fixed hardware 81 is a rectangular cylindrical hardware, and each end portion of the linear restraint member 82 is fixed to opposing wall portions 83a facing each other. The inside of the fixed hardware 81 is filled with a filling material 83, and the filling material 84 is also filled in the groove portion where the linear restraint material 82 is disposed.

  Thus, in the floor support structure 300, the floor slabs 10A, 10B are fixed to the beams 30A, 30B, 30C by the rigid floor mechanism 80. According to this, the fixing degree between the floor slabs 10A, 10B and the beams 30A, 30B, 30C can be further increased, and the horizontal rigidity of the floor slabs 10A, 10B is increased, thereby the floor slabs 10A, 10B and the beams 30A. , 30B, 30C, the rigidity of the entire first floor portion 20 can be increased.

  Further, as shown in FIG. 6B, in the floor support structure 300, the rigidity of the first floor portion 20 is enhanced by embedding the cotter 87. Specifically, a concave portion 86a is formed in one side edge portion 10e of one floor slab 10A, 10B, and the other side edge portion of the floor slab 10A, 10B adjacent to the one floor slab 10A, 10B. 10e is formed with a recess 86b facing the aforementioned recess 86a, and a cotter 87 is embedded in the facing recesses 86a and 86b to enable transmission of shear force between the floor slabs 10A and 10B. In the present embodiment, a substantially cylindrical hole is formed by the recesses 86a and 86b, and a cylindrical cotter 87 is embedded in the hole. However, the shape is not particularly limited, and a rectangular column or hexagonal column is adopted. Also good. According to this, a shearing force can be transmitted between the adjacent floor slabs 10A and 10B, the plurality of floor slabs 10A and 10B can be integrated, and the rigidity as the floor slab material can be increased. It is a thing.

  10A, 10B ... floor slab, 20 ... first floor, 30A, 30B, 30C ... beam, 31 ... upper flange, 32 ... lower flange, 33 ... web, 60 ... second floor, 61 ... floor, 70 DESCRIPTION OF SYMBOLS ... Floor receiving member, 80 ... Rigid floor mechanism, 81 ... Fixed metal, 82 ... Linear restraint material, 86a, 86b ... Recessed part, 87 ... Cotter, 100, 200, 300 ... Floor support structure.

Claims (6)

A plate-like floor slab,
A pair of beams formed of different beams that support the floor slab, and
Each beam is formed as an H-shaped steel formed by connecting a pair of upper and lower flanges with a web,
The pair of beams are provided with the lower end surfaces positioned at the same height,
The first floor is formed by the floor slab being supported by the lower flange of each beam across the pair of beams,
On the first floor, both when at least the highest beam upper surface and the same height, or the supporting member protruding to a position higher than the upper end face is provided, it plated onto the support member is supported Therefore, a double floor in which a second floor is formed above the first floor is formed .   The floor support structure according to claim 1, wherein the floor slab is installed in a state of being placed on the upper surface of the lower flange of each beam. The lower flange of each beam is provided with a floor support member that protrudes toward the opposite beam,
The floor slab is formed such that the distance between two opposed edges supported by a pair of beams is smaller than the distance between the edges of the pair of beams, and one opposed edge is The floor support structure according to claim 1, wherein the floor support member is supported by the floor receiving member of one beam, and the other opposite edge is supported by the floor receiving member of the other beam.   The said beam and the said floor slab are connected by filling the clearance gap between the web of the said beam and the said floor slab, The said beam and the said floor slab are any one of Claims 1-3 characterized by the above-mentioned. Floor support structure as described.   A recess is formed on one side edge of one floor slab, and a recess facing the recess is formed on the other side edge of the floor slab adjacent to the one floor slab. The floor support structure according to any one of claims 1 to 4, wherein a cotter capable of transmitting a shearing force between the floor slabs is embedded. The floor slab is
A linear restraint material constructed between the pair of beams;
One fixed hardware supported by the lower flange of one beam and connecting one end of the linear restraint material;
A rigid floor mechanism comprising: a fixed hardware that is supported by a lower flange of the other beam and connects the other end of the linear restraint member, and is fixed to the beam. The floor support structure as described in any one of 1-5.

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