JPS6259745A - Floor structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a floor structure.

[Prior Art] Conventionally, as a floor structure formed by joining the ends of a small beam to a main beam, there is, for example, a floor structure described in Japanese Patent Application Laid-Open No. 54-22923. In this floor structure, the ends of the small beams arranged in the Y direction are joined to the large beams arranged in the X direction. The girder is made of steel such as H-type steel or channel steel, and includes a web portion and a flange portion. To connect the ends of the small beam to the main beam, a connecting plate is interposed between the end of the small beam and the flange of the large beam, and the end of the small beam is connected to the connecting plate, and the connecting plate and the end of the small beam are connected to each other. They are each joined using a port or the like.

Further, the floor structure includes a plate spring interposed between the flange of the large beam and the end of the small beam with a vibration isolation pad interposed between the ends of the small beam, and the vibration is transmitted from the small beam to the large beam or from the large beam to the small beam. We are trying to reduce vibrations as much as possible.

[Problems to be Solved by the Invention] However, in the conventional floor structure described above, the ends of the small beams are joined to the flange portions of the large beams. Therefore, if an excessive load or sin is applied to the floor part of the floor structure, the flange portion of the girder will twist, causing the small beam to vibrate around the neutral axis of the web portion of the girder, or It was assumed that the beam would be deflected. Such vibrations and deflections are 5
．． This is said to cause excessive floor vibrations and floor noise, leading to a decrease in the feeling of walking on the floor and, in turn, to a decrease in livability. In addition, even if a leaf spring is interposed between the main beam and the small beam with a vibration isolating pad interposed between them, vibrations are mutually transmitted through the connecting plate as another connecting part, and especially micro-vibrations. It was assumed that the beam was easily transmitted from the main beam to the small beam or from the small beam to the main beam.

The present invention aims to improve the rigidity and damping performance of a floor structure.

[Means for Solving the Problems] In order to achieve the above object, the present invention forms a large beam from a steel material including a web portion and a flange portion, and connects the ends of the small beams to the large beam. A floor structure is formed in which the ends of the small beams are joined to the web portions of the main beams with vibration isolating members interposed therebetween.

[Function] The flange portion of the girder undergoes greater torsional deformation around the neutral axis than its web portion. Therefore, according to the present invention, by joining the end portion of the small beam to the web portion, which undergoes less torsional deformation than the flange portion, the bending of the small beam due to the torsional deformation of the joint portion and amplification of vibration can be caused. Therefore, the load and impact applied to the small beam can be stably supported by the large beam.

Further, according to the present invention, it is possible to attenuate vibrations occurring in a small beam or a large beam by the presence of the vibration isolating member, and to reduce vibrations transmitted from a small beam to a large beam or from a large beam to a small beam as much as possible. . This makes it possible to improve the rigidity and damping performance of the floor structure.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is I-I in Figure 5 regarding the joint state of the major beam and small beam.
2 is a sectional view taken along line II-II in FIG. 5, FIG. 3 is a perspective view showing the entire unit building in which the floor structure is used, and FIG. FIG. 5 is a perspective view showing the structure of the building unit used, FIG. 5 is a cross-sectional view taken along the line -V in FIG. 3, and FIG. 6 is a perspective view showing the process of forming the floor structure.

The floor structure 10 shown in FIG. 5 corresponds to the floor portion of the unit building 11 shown in FIG. 3, and the unit building 12 is formed by connecting a plurality of building units vertically and horizontally. That is, the T-unit building 12 shown in FIG. 3 consists of a plurality of r-floor building units 14 arranged adjacent to each other on the top of a foundation 13, and roughly above the lower-floor building unit 14 is an upper-floor building unit 15. Corresponding awns are distributed. The building units 14 and 15 that are vertically and horizontally adjacent to each other are connected to each other, and a roof unit 16 is disposed above the connected L-floor building units 15. .

The unit buildings 12 constructed in this way, each lower floor building unit) 14 and upper floor building unit 15 are as follows:
It is formed by combining a plurality of structural members into a substantially rectangular parallelepiped shape.

FIG. 4 shows the structure of the lower and upper floor building units 14, 15, each of which has steel columns 17 erected at each of its four corners. Each pillar to be erected 1
A steel girder girder 18 is arranged between the lower end sides of each support column 17 in the X direction, and a steel floor is installed between the lower end side parts of each support support 17 in the Y direction. A girder 19 is provided. Each girder girder 18 and floor girder 19 are connected at their respective ends to the lower end side portions of each support column 17. On the other hand, among the erected columns 17, a steel girder ceiling girder 20 is arranged between the lower end sides of each column 17 in the X direction, and between the upper end sides of each column 17 in the Y direction. A gable ceiling girder 21 made of steel is installed. Each girder ceiling girder 20 and gable ceiling girder 21 are also connected at their respective ends to the upper end side portions of each support column 17. An intermediate support 22 is interposed between each girder body girder 18 and girder ceiling girder 20 which are vertically opposed to each other.

Between each pair of opposing girder girders 18, there is a floor girder 22.
A plurality of girder beams 22 are arranged at predetermined intervals in the X direction. The installed base beams 22 are formed by joining each end to each of the laminated girders 18. As shown in FIGS. 5 and 6, the bulk beam 18 is made of channel steel and has flange portions 24 on the upper and lower sides of the web portion 23, respectively. On the other hand, the floor beam 22 is made of H-shaped steel, and the web portion 22 is also made of H-shaped steel.
A connecting piece 27 formed by bending a steel plate is used to join the ends of the floor beams 22 to the 0-digit floor girders 18, which are provided with flange portions 26 on the upper and lower sides of the floor beams 5, respectively. For joining via the connecting piece 27, first, as shown in FIG.
It is concluded by 0. As the vibration isolating member 28, there are, for example, a vibration isolating rubber material, a vibration isolating resin material, and the like. When the connecting piece 27 is joined to the web part 25 of the floor beam 22 as shown in FIGS. Porto 2 with intervening
9 and Nara i.30. This results in
The web portion 25 at the end of the floor beam 22 is joined to the web portion 23 of the girder 18 via the connecting piece 27, and between the connecting piece 27 and the web portion 23 and between the connecting piece 27 and the web portion 25. , a vibration isolating member 28 is interposed as shown in FIGS. 1 and 2, respectively.

When the bulk beam 18 and the floor beam 22 are joined in this way, a plurality of joists 31 are disposed above the floor beam 22. Each of the joists 31 is arranged at a predetermined interval in the Y direction, and each of the joists 31 is supported at each end by the opposing rendition girder 19 at the intersection with the floor girder 22. It is joined to the floor beam 22. The joining is performed by driving nails 32 into the floor beams 22 and the joists 31.

Further, a floor material 33 is attached to the upper surface of the joist material 31 to be provided, thereby forming the floor structure 10 of each building unit 14, 15. In addition, in FIG. 4, 34 indicates a ceiling beam.

Next, the operation of the above embodiment will be explained.

According to the floor structure IO according to the above embodiment, the end portion of the floor beam 22 has less torsional deformation around the neutral axis Q (see FIG. 5) than the flange portion 24 of the bulk beam 18. It will be joined to the web portion 23 via a connecting piece 27. As a result, even when vibrations or shocks in the direction of arrow A are applied to the floor surface of the lower floor building unit 14 shown in FIG. This will result in the elimination of this. Therefore, it becomes possible to stably support the load and impact applied to the floor beam 22 by the bulk beam 18.

Moreover, between the connecting piece 27 and the floor beam 22 and the connecting piece 27
Since a vibration isolating member 28 is interposed between the floor beam 22 or the bulk beam 18, vibrations occurring in the floor beam 22 or the bulk beam 18 can be absorbed and attenuated by the vibration isolating member 28. Become. Furthermore, it is possible to reduce as much as possible the vibrations transmitted from the floor beam 22 to the bulk beam 18 or from the pile beam 18 to the floor beam z2. As a result, building unit 14.
It becomes possible to enjoy a stable walking sensation on the floor surface of 15 without causing slight vibrations or floor noise, and it becomes possible to improve the rigidity of the floor structure and the vibration damping performance.

FIG. 7 is a sectional view similar to FIG. 1 according to another embodiment of the present invention. In the embodiment described above, as shown in FIGS. 1 and 2, a vibration isolating member 28 is interposed only between the floor beam 22 and the connecting piece 27.

However, in the unimplemented example, in addition to the above-mentioned example, a vibration isolating member 28 is also interposed between the head portion of the bolt 29 and the web 25 and between the nut 30 and the connecting piece 27. . As a result, it is possible to reduce the transmission of micro-vibration between the bulk beam 18 and the girder beam 22 through the bolts 29 to the greatest extent possible by interposing each vibration isolating member 28.

[Effects of the Invention] As described above, the present invention provides a floor structure in which a main beam is formed of a steel material including a web part and a flange part, and the ends of small beams are joined to the main beam. Since the ends of the small beams are joined to the web portions of the main beams with the vibration isolating member interposed therebetween, it is possible to improve the rigidity and damping performance of the floor structure.

[Brief explanation of drawings]

Figure 1 shows r-I in Figure 5, which shows the connection state between the major beam and the minor beam.
2 is a sectional view taken along the line ■-II in FIG. 5, FIG. 3 is a perspective view showing the entire unit building in which the floor structure is used, and FIG. Figure 5 is a perspective view showing the structure of the building unit that will be built.
6 is a perspective view showing the process of forming the floor structure, and FIG. 7 is a sectional view similar to FIG. 1 according to another embodiment of the present invention. 10... Floor structure, 18... Girder girder, 22...
Floor beam, 23... web part, 24... flange part,
27... Connection piece, 28... Vibration isolating member. Patent applicant Sekisui Chemical Co., Ltd. Representative Hiroshi 1) Kaoru Dai 1 Figure $ 2 Figure

Claims (1)

[Claims] (1) A floor structure in which a girder is formed of a steel material having a web portion and a flange portion, and the ends of the small beams are joined to the girder, and the ends of the small beams are connected to the ends of the girders. 1. A floor structure, characterized in that the floor structure is joined with a vibration isolating member interposed therein.