JP6366992B2 - Building structure - Google Patents

Description

  The present invention relates to a building structure.

  Conventionally, in a multi-storied building structure, transmission of vibration from one floor to another floor has been regarded as a problem. For example, when installing a facility where a large number of people simultaneously perform the same movement movement, such as a fitness studio or aerobics studio, on any floor of a building structure, the floor of the floor is vibrated and vibrated. Floors on other floors may vibrate greatly due to vibrations transmitted through columns and walls.

  As a structure for preventing transmission of vibration from a floor to be vibrated (hereinafter referred to as “excited floor”) to a floor on another floor (hereinafter referred to as “target floor”), for example, a beam that supports the excited floor A structure that reduces the vibration of the vibrating floor by reinforcing the structure is conceivable. For example, Patent Document 1 proposes a vibration damping structure that supports a beam structure. Specifically, this patent document 1 discloses a beam structure in which a damper member that absorbs energy due to vertical deformation generated in a beam structure is provided at a connection portion between an end of the beam structure and a fixed structure. The vertical vibration of the body is reduced, and the vibration generated on the floor supported by the beam structure is reduced.

JP 2008-106574 A

  However, even when the damping structure according to Patent Document 1 described above is applied to the beam structure, it is actually difficult to sufficiently reduce the vibration of the target floor. Therefore, there has been a demand for a building structure that can further reduce the vibration of the target floor.

  This invention is made | formed in view of the above, Comprising: It aims at providing the building structure which can further reduce transmission of an object floor.

In order to solve the above-described problems and achieve the object, the building structure according to claim 1 is configured such that the vibration floor is excited by a vibration source and is excited by a vibration source. And a building structure that reduces vibration generated on a target floor existing on a target floor of the same building, wherein the vibration of the vibration floor passes through a wall positioned between the vibration floor and the target floor. Transmission preventing means for preventing transmission to the target floor, and a variable frequency means for making the natural frequency of the excitation floor different from the natural frequency of the target floor , The variable frequency means is a reinforcing means for reinforcing the beam supporting the excitation floor, and the reinforcing means is a means for reinforcing the longest beam among the beams supporting the excitation floor, and is the longest Between a beam and a wall adjacent to the longest beam of the walls, Serial to a plurality of locations along the length of the longest beam, provided with transmission preventing means.

  The building structure according to claim 2 is the building structure according to claim 1, wherein the transmission preventing means is a wall positioned between the vibration floor and the vibration floor and the target floor. Are slidable means for slidably connecting each other along the vertical direction.

According to the building structure of claim 1, by providing the transmission preventing means, it is possible to prevent the vibration of the vibration floor from being transmitted to the target floor through the wall, and by providing the frequency variable means. Since the vibration floor and the target floor can be prevented from resonating, the vibration of the target floor can be further reduced.
Further, since the reinforcing means for reinforcing the beam supporting the vibration floor is provided, it is possible to make the natural frequency of the vibration floor and the natural frequency of the target floor different by a very simple configuration.
Further, since the reinforcing means reinforces the longest beam among the beams that support the vibration floor, the natural frequency of the vibration floor and the natural frequency of the target floor can be efficiently differentiated.
In addition, by reinforcing the longest beam, that is, the beam that receives a large load on the vibration floor, the vibration floor can be efficiently reinforced.

  According to the building structure according to claim 2, the vibration floor and the wall from the vibration floor to the target floor are connected by the sliding means so as to be slidable at least along the vertical direction. It is possible to prevent the vertical displacement of the light from being transmitted to the target floor with a very simple configuration.

It is a side view showing roughly a building structure concerning an embodiment of the invention. It is AA arrow sectional drawing of FIG. It is a perspective view which shows roughly the object floor where the reinforcement part was applied. It is a top view which shows an insulation part. It is a side view which shows an insulation part. 6A and 6B are diagrams schematically illustrating an analysis model according to an embodiment of the present invention, in which FIG. 6A is an analysis model a, FIG. 6B is an analysis model b, FIG. 6C is an analysis model c, and FIG. (D) is a figure which shows the analysis model d. 7A and 7B are graphs showing analysis results of the analysis model a, the analysis model b, and the analysis model c according to an embodiment of the present invention, in which FIG. 7A is the second floor, FIG. 7B is the fourth floor, FIG. (C) is a graph which shows the analysis result of the 5th floor. FIG. 8A is a graph showing the analysis results of the analysis model a and the analysis model d of the embodiment of the present invention, where FIG. 8A is the second floor, FIG. 8B is the fourth floor, and FIG. It is a graph which shows the analysis result of the 5th floor.

  Hereinafter, embodiments of a building structure according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited by this embodiment.

[Basic concept of the embodiment]
First, the basic concept of this embodiment will be described. The present embodiment generally relates to a building structure having a large number of buildings, which reduces vibrations generated on a target floor existing on the target floor. In addition, although the utilization purpose etc. of this building structure are arbitrary, in this Embodiment, the facility of various uses is mixed and it demonstrates as what is a complex type facility arrange | positioned on each floor.

  Here, the “target floor” is a floor that is a target to reduce vibration in the building structure according to the present embodiment, and is a floor provided on the ground or underground. This target floor is provided in the same building as the vibration floor (described later), and includes, for example, the upper floor and the lower floor of the vibration floor, but is not limited to the floor directly connected to the vibration floor in this way. Also included are floors that are indirectly continuous across a vibrating floor and other floors.

  Further, the “vibration floor” is a floor having a vibration floor that is vibrated by a vibration source, and is a floor provided on the ground or underground. Here, a specific purpose of use of the vibration floor is arbitrary, but in the present embodiment, it will be described as being used as a fitness studio or an aerobics studio. Further, the “vibration source” is a person or device that vibrates the vibration floor, and in this embodiment, a large number (for example, 10 to 10) that perform exercises such as jumping and landing by fitness and aerobics. It is assumed that there are about 50 people).

[Specific contents of the embodiment]
Next, specific contents of the present embodiment will be described.

(Constitution)
Initially, the structure of the building structure 1 which concerns on this Embodiment is demonstrated. FIG. 1 is a side view schematically showing a building structure 1 according to the present embodiment, and FIG. 2 is a cross-sectional view taken along line AA in FIG. As shown in FIGS. 1 and 2, the building structure 1 according to the present embodiment is formed as a five-story building, but is not limited to such a structure. For example, the building has six or more floors. Alternatively, it may be formed as a building having a floor of less than 5 floors, or may be a building having an underground floor. Each of the building structures 1 is generally configured to include columns, beams, walls, and floors, but the structure of such a building is publicly known unless otherwise specified. The detailed explanation is omitted.

  Here, when referring to a specific pillar, it is referred to as the first-floor pillar 1P, the second-floor pillar 2P, the third-floor pillar 3P, the fourth-floor pillar 4P, or the fifth-floor pillar 5P, and there is no need to distinguish them. In some cases, it is simply referred to as a “pillar”. In addition, when referring to a specific beam, it will be referred to as first-floor beam 1L, second-floor beam 2L, third-floor beam 3L, fourth-floor beam 4L, fifth-floor beam 5L, or roof beam 6L. When there is no need, it will be described simply as “beam”. Also, when referring to a specific wall, it will be described as 1st floor wall 1W, 2nd floor wall 2W, 3rd floor wall 3W, 4th floor wall 4W, or 5th floor wall 5W, respectively, and it is not necessary to distinguish these (The wall is arranged in a space surrounded by columns and beams. However, for convenience of illustration, the front and back walls are omitted in FIG. 1. Only the walls located to the right and left are shown). In addition, when referring to a specific floor, the first floor 1F, the second floor 2F, the third floor 3F, the fourth floor 4F, or the fifth floor 5F will be described, and there is no need to distinguish between them. Will be referred to simply as “floor”.

  In the present embodiment, the description will be made assuming that the third floor is a vibration floor, and this vibration floor is used as a fitness studio or an aerobics studio. Hereinafter, the floor of the vibration floor (that is, the third floor 3F) will be referred to as “vibration floor” as necessary. In the present embodiment, the second floor, the fourth floor, and the fifth floor are described as the target floors, and the floors of the target floors (that is, the second floor 2F, the fourth floor 4F, and the fifth floor 5F). ) Is hereinafter referred to as “target floor” as necessary. Here, the building structure 1 according to the present embodiment includes a reinforcing portion 10 and an insulating portion 20.

(Configuration-reinforcement part)
The reinforcing part 10 is a frequency variable means that makes the natural frequency of the vibration floor different from the natural frequency of the target floor, and in particular, is a reinforcement means that reinforces the beam that supports the vibration floor. . FIG. 3 is a perspective view schematically showing a target floor to which the reinforcing portion 10 is applied. In FIG. 3, for convenience of illustration, a part of the second floor wall 2W and a part of the third floor wall 3W are cut out. As shown in FIG. 3, the reinforcing portion 10 is specifically a brace installed in an area surrounded by the second floor pillar 2P, the third floor beam 3L, and the second floor 2F. This is a known brace that prevents deformation of the second-floor column 2P and the third-floor beam 3L by being interposed between the column base of the column 2P and the intermediate portion in the longitudinal direction of the third-floor beam 3L. The material or the like of the reinforcing portion 10 is arbitrary, but the reinforcing portion 10 according to the present embodiment is formed of a steel frame or the like. In addition, since the specific structure of such a reinforcement part 10 is arbitrary, description of the specific structure is abbreviate | omitted.

  Here, the beam reinforced by the reinforcing portion 10 is arbitrary as long as it is a beam that supports the vibration floor, but in the present embodiment, as shown in FIG. A description will be given assuming that the reinforcing portion 10 is installed on the longest beam. In this way, by reinforcing the longest beam, that is, the beam that receives a large load on the vibration floor, the vibration floor can be efficiently reinforced. Further, the number of beams to be reinforced is arbitrary, and in the present embodiment, description will be made assuming that only one beam is reinforced. However, the present invention is not limited to this, and a plurality of beams may be reinforced.

  As described above, the beam supporting the target floor is not reinforced by the reinforcing portion 10 and only the beam supporting the vibrating floor is reinforced by the reinforcing portion 10, so that the rigidity of the vibrating floor and the target floor is different. The natural frequency of the vibration floor and the natural frequency of the target floor can be made different from each other. In this embodiment, the “natural frequency” in this case will be described as specifically indicating “primary natural frequency”. However, the secondary natural frequency and higher natural frequencies after that may be targeted.

  In addition, in the building structure 1, the lower the floor, the larger the size of the pillar, compared to the upper floor, but the size and thickness of beams and floors in the same position in plan view will change even if the floor is different. In many cases, it is difficult to do so and is almost equal. For this reason, the natural frequency of the excitation floor and the target floor, for which no countermeasure is taken, is almost equal, which is one reason that resonance tends to occur. In the present invention, at the time of renovation of an existing building or new construction of a building, the natural frequency of the vibration floor and the natural frequency of the target floor are made different by an extremely simple configuration as will be described later. The walls between the floor and the floor are separated from each other by the insulating portion 20 to make it difficult for resonance to occur, and vibration of the target floor can be appropriately prevented.

(Configuration-insulation part)
The insulating part 20 is a transmission preventing means for preventing the vibration of the vibration floor from being transmitted to the target floor through a wall located between the vibration floor and the target floor. The sliding means connects the floor and the wall positioned between the vibration floor and the target floor so as to be slidable at least along the vertical direction. FIG. 4 is a plan view showing the insulating portion 20. FIG. 5 is a side view showing the insulating portion 20. As shown in FIGS. 4 and 5, the insulating portion 20 is a fastener that generally connects a beam and a wall, and is particularly configured as a fastener having a function of preventing vibration transmission. .

  Here, the position where the insulating part 20 is provided will be described first. The position where the insulating portion 20 is provided is arbitrary as long as it is a position where the transmission of vibration through the wall located between the excitation floor and the target floor can be prevented as described above. For example, in FIG. 3, the installation position of the insulating portion 20 is illustrated by a black triangle, and the installation position of a known fastener (a fastener having no function of preventing vibration transmission) is illustrated by a white triangle. .

  As shown in FIG. 3, in the present embodiment, first, an insulating portion 20 (a black triangle located below the third-floor 3L) between the third-floor 3L and the second-floor wall 2W. Thus, vibration transmission from the vibration floor to the second floor 2F, which is the target floor located below the vibration floor, is prevented from passing through the second floor wall 2W. In addition, when the insulating part 20 is installed between the second floor beam 2L and the second floor wall 2W instead of the installation position (the white triangle located on the upper surface of the second floor 2F in FIG. In the case of replacing with a painted triangle), transmission of vibration to the target floor located below the vibration floor can be similarly prevented.

  Further, in the present embodiment, secondly, by providing an insulating portion 20 (a black triangle located above the third-floor 3L) between the third-floor 3L and the third-floor wall 3W, the processing is performed. Transmission of vibration from the floor to the fourth floor 4F and the fifth floor 5F, which are target floors located above the vibration floor, through the third floor wall 3W is prevented. In addition, even if the insulating portion 20 is provided between the fourth-floor beam 4L and the third-floor wall 3W instead of the installation position, vibrations are similarly transmitted to the target floor located above the excitation floor. Can be prevented.

  Thus, in the present embodiment, since the floor below the vibration floor (the second floor) is the target floor, the insulating portion 20 is provided below the vibration floor, and further above the vibration floor (4 Since the floor and the fifth floor are also the target floors, the insulating portion 20 is provided above the vibration floor. However, the installation position of the insulating unit 20 may be appropriately changed according to the positional relationship between the vibration floor and the target floor. For example, when the target floor is only the floor below the vibration floor, the insulating unit 20 may not be provided above the vibration floor, and the target floor is only the floor above the vibration floor. In this case, the insulating part 20 may not be provided below the vibration floor.

  Here, when one or a plurality of floors are interposed between the vibration floor and the target floor, the edge is cut off by the insulating portion 20 at any wall located between the vibration floor and the target floor. For example, vibration transmission to the target floor can be reduced. For example, when the vibration floor is the third floor and the target floor is only the sixth floor (not shown in the present embodiment), the insulating portion 20 may be provided only on the fourth floor wall 4W, and only on the fifth floor wall 5W. An insulating unit 20 may be provided. However, in order to more effectively prevent vibration transmission, it is preferable to provide the insulating portion 20 on the wall adjacent to the upper side of the vibration floor or the wall adjacent to the lower side. For example, when the vibration floor is the third floor and the target floor is only the sixth floor (not shown in the present embodiment), it is desirable to provide the insulating portion 20 on the third floor wall 3W. Because the vibration spreads in a plane, in the process of transmitting the vibration from the excitation floor to the target floor via the floor other than the target floor, the case where the wall is adjacent to the excitation floor Because the range of vibration influence on the target floor is greatly different from the case of cutting with a wall that is not adjacent to the excitation floor (for example, the wall immediately before the target floor), the range that must be addressed also differs. It is. From such a viewpoint, in this application, the insulating part 20 is installed with respect to the wall (3rd floor wall 3W) adjacent to an excitation floor upward, and the wall (2nd floor wall 2W) adjacent below.

  In the following description, the insulating portion 20 will be described by focusing only on the insulating portion 20 installed between the third-floor beam 3L and the second-floor wall 2W, and the same configuration can be made when installed at other positions. Description is omitted.

  Next, the overall configuration of the insulating unit 20 will be described. The insulating portion 20 is disposed below the beam (in this embodiment, the third-floor beam 3L) that supports the vibration floor, and generally includes an angle 21, an angle 22, and a connection bolt 23. Has been. Here, the angle 22 is disposed inside the second floor wall 2W. Actually, the second-floor ceiling board is arranged below the third-floor beam 3L, and the decorative board and the outer wall material are arranged on the indoor side and the outdoor side of the angle 22, these ceiling boards, About a decorative board and an outer wall material, since it can construct | assemble by a well-known method, description and illustration are abbreviate | omitted. Below, the angle 21, the angle 22, and the connection bolt 23 which comprise the insulation part 20 are demonstrated.

  The angle 21 is a support means for supporting the load of the third-story beam 3L, and is configured as a known angle material. In the angle 21, one piece (hereinafter referred to as a horizontal piece 21a) is arranged along a substantially horizontal direction, so that the other piece (hereinafter referred to as a vertical piece 21b) is necessarily arranged along a substantially vertical direction. The Here, a screw hole is formed in the horizontal piece 21a, and a screw is inserted into the screw hole formed in the beam connecting portion 30 welded to the third-floor beam 3L to be screwed. Thus, the angle 21 and the third floor beam 3L are connected to each other. As described above, the vertical vibration transmitted from the vibration source to the third-floor beam 3L via the third-floor floor 3F is transmitted to the angle 21 via the beam connection portion 30. Further, the polished stainless steel plate 24 is welded to one surface (the surface far from the angle 22) of the vertical piece 21b, and the polished stainless steel plate 25 is welded to the other surface (the surface closer to the angle 22). Has been. And the screw hole (illustration omitted) is formed so that these grinding | polishing stainless steel plate 24, the vertical piece 21b, and the grinding | polishing stainless steel plate 25 may be penetrated, and this screw hole is formed as an elongate hole along a perpendicular direction. Yes.

  The angle 22 is a support means that is disposed inside the second floor wall 2W and supports the load of the second floor wall 2W, and is configured as a known angle material. The angle 22 is an angle having substantially the same height as the second floor, and the lower end of the angle 22 is connected to the second floor 2F, and the upper end of the angle 22 is the third floor beam. It is located near 3L. Here, one piece of the angle 22 (hereinafter referred to as a parallel piece 22 a) is disposed substantially parallel to the vertical piece 21 b of the angle 21, whereby the other piece (hereinafter referred to as an orthogonal piece 22 b) is It arrange | positions so that it may orthogonally cross with both the horizontal piece 21a and the vertical piece 21b. Here, a polished stainless steel plate 26 is welded to one surface (the surface facing the angle 21) of the parallel piece 22a. Moreover, the orthogonal piece 22b is joined to the decorative board and the outer wall material which comprise the 2nd floor wall 2W, for example with the well-known joining methods, such as screwing and welding.

  Further, between the polished stainless steel plate 25 joined to the vertical piece 21b of the angle 21 and the polished stainless steel plate 26 joined to the parallel piece 22a of the angle 22, the polished stainless steel plate 25 and the polished stainless steel plate 26 In order to reduce the friction between them, a low friction material 41 is disposed. In addition, the friction between the polished stainless steel plate 24 and the washer 23a is between the polished stainless steel plate 24 joined to the vertical piece 21b of the angle 21 and a washer 23a for fastening a connection bolt 23 described later. In order to reduce this, a low friction material 42 is disposed. Specific materials of these low friction materials 41 and 42 are arbitrary, but synthetic resin materials having a low friction coefficient such as Teflon (registered trademark) can be used.

  The connection bolt 23 is connection means for connecting the angle 21 and the angle 22 to each other. Specifically, the connecting bolt 23 sequentially penetrates the parallel piece 22a, the polished stainless plate 26, the low friction material 41, the polished stainless plate 25, the vertical piece 21b, the polished stainless plate 24, and the low friction material 42, and its tip The angle 21 and the angle 22 are connected to each other by inserting the washer 23a into the portion and fastening the nut 23b. Here, since the screw holes formed in the polished stainless steel plate 24, the vertical piece 21b, and the polished stainless steel plate 25 are long holes along the vertical direction, the connection bolts 23 are formed along the vertical direction inside the long holes. The angle 21 can slide along the vertical direction with respect to the angle 22. Further, the friction between the polished stainless steel plate 25 and the polished stainless steel plate 26 is reduced by the low friction material 41, and the friction between the polished stainless steel plate 24 and the washer 23a is reduced by the low friction material 42. Therefore, the angle 21 can slide smoothly with respect to the angle 22. In addition, the fastening force of the nut 23b with respect to the connection bolt 23 is appropriately set so that the connection bolt 23 can slide inside the elongated hole. With such a configuration, the vertical vibration transmitted from the third floor 3F via the third floor beam 3L is absorbed by the insulating portion 20 without being transmitted to the second floor wall 2W.

(Example)
Next, examples of the present invention will be described. In this example, analysis was performed using a structural analysis system for construction MIDAS / Gen (Ver. 800) commercially available from Structural Planning Laboratory.

  Here, in the present embodiment, an analysis model is created assuming that the third floor is a vibration floor provided with a fitness and aerobics studio, and the floor on the third floor is used as an excitation floor. The vibrations of the floors (the second floor 2F, the fourth floor 4F, and the fifth floor 5F. These are simply referred to as “target floors” when there is no need to distinguish them). FIG. 6 is a diagram schematically showing an analysis model of the present embodiment, in which FIG. 6A is an analysis model a, FIG. 6B is an analysis model b, FIG. 6C is an analysis model c, FIG. 6D shows the analysis model d. In addition, the description regarding these analysis model a, analysis model b, analysis model c, and analysis model d is mentioned later, and first, the fundamental structure of the analysis model used in the present Example is demonstrated. First, as shown in FIG. 6, the analysis model uses a vertical spring for a column in which a plurality of mass points (hereinafter, n-th mass points) having a mass corresponding to the n-th mass excluding the floor mass are regarded as pillars on each floor. They are connected to each other. A plurality of mass points (hereinafter, nth floor mass points) having a mass corresponding to the floor mass of each floor are connected to each nth mass point via a floor vertical spring. In addition, in order to consider the transfer of vibrations from the floor of a specific floor to the floor of another floor, the n-floor mass points of each floor are connected to each other by a vertical spring for a wall that looks like the wall of each floor. ing. In this embodiment, unless otherwise specified, the primary natural frequency of the vibration floor and the primary natural frequency of the target floor are assumed to be 8 Hz.

  Here, in the present example, as shown in FIGS. 6A to 6D, vibration analysis was performed on four types of analysis models. However, the target structure shown in the present embodiment is the analysis model shown in FIG. 6D, and the other analysis models shown in FIGS. 6A to 6C are those of the present embodiment. This is an analysis model created for comparison with the target structure. Hereinafter, each of these four types of analysis models will be described.

  First, an “analysis model a” shown in FIG. 6A is an analysis model of a structure that does not include any of the reinforcing portion 10 and the insulating portion 20 (that is, no countermeasures). The “analysis model b” shown in FIG. 6B is an analysis model of a structure that includes only the insulating portion 20 and does not include the reinforcing portion 10, and specifically, the third floor beam 3L and the second floor. The present invention relates to a structure including an insulating portion 20 that separates the wall 2W from each other and an insulating portion 20 that separates the fourth-floor beam 4L and the third-floor wall 3W from each other. The “analysis model c” shown in FIG. 6C is an analysis model of a structure that includes only the reinforcing portion 10 and does not include the insulating portion 20, and specifically reinforces the third-level beam 3L. The present invention relates to a structure provided with a reinforcing portion 10. Moreover, the “analysis model d” shown in FIG. 6D is an analysis model of a structure including both the insulating portion 20 and the reinforcing portion 10, and specifically, the third floor beam 3L and the second floor wall 2W. Is provided with an insulating portion 20 that separates the third floor beam 4L and the third floor wall 3W from each other, and a reinforcing portion 10 that reinforces the third floor beam 3L. .

  The analysis results of vibration analysis performed under such conditions are shown below. First, FIG. 7 is a graph showing the analysis results of the analysis model a, the analysis model b, and the analysis model c of this example. FIG. 7A shows the second floor 2F, and FIG. Floor 4F, FIG. 7 (c) is a graph showing the analysis results of the fifth floor 5F. In each graph, the horizontal axis indicates the frequency (Hz), and the vertical axis indicates the response acceleration (gal / ton) per unit load. The following view can be obtained from the graph shown in FIG.

  First, in any of FIGS. 7 (a), 7 (b), and 7 (c), the analysis model a (without countermeasures) and the analysis model b (only the insulating portion 20) have substantially the same analysis results. It has become. From this, even when the vibration floor and the target floor are separated from each other by the insulating unit 20 as in the analysis model b, the target floor vibrates in the same manner as when no measures are taken. It can be seen that the vibration of the target floor is not properly prevented. The reason for this is that the vibration floor and the target floor are not connected to each other through a wall, but the primary natural frequency of the vibration floor and the primary natural frequency of the target floor are both 8 Hz and coincide. Therefore, the vibration floor and the target floor resonate due to the vibration transmitted through the column, and the vibration of the target floor is amplified.

  Moreover, in any of FIGS. 7A, 7B, and 7C, the analysis model a (without countermeasures) and the analysis model c (only the reinforcing portion) have substantially the same analysis results. ing. From this, even when the vibration floor is reinforced by the reinforcing portion 10 as in the analysis model c, the target floor vibrates in the same manner as when no measures are taken, and the vibration of the target floor is reduced. It turns out that it cannot prevent properly. This is because, by reinforcing the vibration floor, the primary natural frequency of the vibration floor, which was originally 8.0 Hz, can be increased to about 9.4 Hz, and the resonance between the vibration floor and the target floor can be increased. Although it can be prevented, the vibration floor and the target floor are connected to each other by a wall, so the vibration of the vibration floor is transmitted to the target floor through the wall, and the response acceleration at the natural frequency of both floors Because it will rise.

  As described above, even if the insulating part 20 or the reinforcing part 10 is separately provided as in the analysis model b and the analysis model c, the vibration isolation effect of the target floor is low, and an appropriate effect cannot be obtained. I understand that.

  Next, FIG. 8 is a graph showing the analysis results of the analysis model a and the analysis model d of the present embodiment. FIG. 8A shows the second floor 2F, and FIG. 8B shows the fourth floor 4F. FIG.8 (c) is a graph which shows the analysis result of the 5th floor 5F. In each graph, the horizontal axis indicates the frequency (Hz), and the vertical axis indicates the response acceleration (gal / ton) per unit load. As shown in FIG. 8, in any of FIGS. 8A, 8B, and 8C, the analysis model d (insulating portion 20 + reinforcing portion 10) is compared to the analysis model a (without countermeasures). ) Is an analysis result showing a low response acceleration per unit load. From this, by separating the vibration floor and the wall between the vibration floor and the target floor from each other by the insulating portion 20 and reinforcing the vibration floor by the reinforcing portion 10 as in the analysis model d. It can be seen that the vibration of the target floor can be appropriately prevented as compared with the case where no measures are taken. In particular, the synergy is more than simply adding the vibration reduction effect when only the insulating portion 20 is applied as in the analysis model b and the vibration reduction effect when only the reinforcing portion 10 is applied as in the analysis model c. The fact that the effective effect appears remarkably can be recognized from FIG.

  The reason for this is that it is possible to transmit the vibration only through the column by preventing the vibration transmitted by the wall between the excitation floor and the target floor by the insulating portion 20 (that is, not transmitting directly to the beam). This is because by making the primary natural frequency of the excitation floor and the target floor different by the reinforcing portion 10, it is possible to prevent resonance due to vibration transmitted from the column. Further, FIG. 8 shows that the response acceleration per unit load in the vicinity of 8 Hz of the vibration floor is shifted to around 9.4 Hz and the response acceleration is reduced. Here, as for the vertical vibration, there is a feature that the human body is less likely to feel vibration as the frequency is higher in the frequency region exceeding 8 Hz, and the frequency near 9.4 Hz is a frequency that the human body is hard to feel compared to 8 Hz. Therefore, it can be seen that the configuration in which the human body hardly feels vibration as a whole can be achieved in the present embodiment.

(Effect of embodiment)
As described above, according to the present embodiment, it is possible to prevent the vibration of the vibration floor from being transmitted to the target floor through the wall by providing the insulating portion 20, and via the pillar by providing the reinforcing portion 10. Thus, the resonance of the target floor due to the vibration of the vibration floor being transmitted to the target floor can be suppressed, so that the transmission of vibration from the vibration floor to the target floor can be further reduced as compared with the conventional case.

  Further, since the vibration floor and the wall from the vibration floor to the target floor are connected by the insulating portion 20 so as to be slidable at least along the vertical direction, the vertical displacement of the vibration floor is transmitted to the target floor. Can be prevented by an extremely simple configuration.

  In addition, since the reinforcing portion 10 that reinforces the beam that supports the vibration floor is provided, the natural frequency of the vibration floor and the natural frequency of the target floor can be made different with a very simple configuration.

  Further, since the reinforcing means reinforces the longest beam among the beams that support the vibration floor, the natural frequency of the vibration floor and the natural frequency of the target floor can be efficiently differentiated.

[Modifications to Embodiment]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Can do. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above contents, and may vary depending on the implementation environment and details of the configuration of the invention. May be solved, or only some of the effects described above may be achieved. For example, even when the building structure 1 according to the present embodiment is not capable of reducing the vibration transmitted from the vibration floor to the target floor, the transmission of the vibration can be achieved by a technique different from the conventional technique. The problem of the present invention is solved.

(About dimensions and materials)
The dimensions, shapes, ratios, and the like of the respective parts of the building structure 1 described in the detailed description of the invention and the drawings are merely examples, and other arbitrary dimensions, shapes, ratios, and the like can be used.

(About the target floor)
In the present embodiment, the studio is described as being provided over the entire area of the vibration floor, but the present invention is not limited to this. For example, even when a studio is provided in a part of a plurality of rooms constituting a vibration floor, the floor is a floor other than the floor of the vibration floor as a target floor and has the same configuration as the above embodiment. Can be adopted.

(About frequency variable means)
In the present embodiment, the frequency variable means has been described as the reinforcing portion 10 that reinforces the beam that supports the vibration floor. However, the natural frequency of the vibration floor and the natural frequency of the target floor are determined as follows. The present invention is not limited to this as long as they can be different from each other. For example, in the present embodiment, it has been described that the reinforcing portion 10 is installed only on the vibration floor, but the reinforcing portion 10 may be provided on both the vibration floor and the target floor. Thus, the natural frequency of the target floor may be reinforced so as to be 9 Hz, and the natural frequency of the vibration floor may be reinforced by the reinforcing portion 10 so as to be 10 Hz. Moreover, although the installation cost of the reinforcement part 10 may increase, the reinforcement part 10 is not provided in the vibration floor, but by providing the reinforcement part 10 in all floors other than the vibration floor, it is peculiar to the vibration floor. The frequency and the natural frequency of the target floor may be made different from each other. In addition, the natural frequency of the vibration floor and the natural frequency of the target floor can be increased by increasing the natural frequency of the vibration floor by increasing the beam that supports the vibration floor without providing the reinforcing portion 10. May be different from each other.

  In the present embodiment, the frequency variable means has been described as a brace that reinforces the beam that supports the vibration floor. However, as long as it is possible to reinforce the beam that supports the vibration floor. However, the present invention is not limited to this. For example, the beam may be reinforced by forming it as a truss beam. This is because the vibration from the vibration floor is directly transmitted to the column in the same manner as the brace reinforcement described above. By the way, when a partition wall is provided at the boundary between the excitation floor and the target floor, and the inter-column reaches the upper floor under the beam and under the floor, either the upper floor under the beam or under the floor By providing the transmission preventing means of this application, it is possible to suitably prevent the vibration of the vibration floor from being transmitted to the target floor via the partition wall. Moreover, you may provide combining the structure for reinforcing the vibration floor as mentioned above in multiple numbers.

  Further, in the present embodiment, the frequency variable means is described as the reinforcing portion 10 that reinforces the longest beam among the beams that support the excitation floor, but the installation location is not limited to this, and the addition portion is not limited thereto. You may install with respect to the shortest beam etc. among the beams which support a vibration bed. Although the reinforcing part 10 has been described as reinforcing only one beam, the present invention is not limited to this, and a plurality of beams may be reinforced.

(About insulation)
In the present embodiment, the insulating portion 20 has been described as being provided only on the wall that constitutes one structural surface that is continuously interposed between the excitation floor and the target floor in the vertical direction, but is not limited thereto. . For example, you may provide the insulating part 20 in the wall which comprises the part of multiple composition interposed between an excitation floor and a target floor. Specifically, for example, the insulating portions 20 may be provided between all the second-floor walls 2W and the third-floor beams 3L. According to such a configuration, the vibration of the excitation floor can be further prevented from being transmitted to the target floor, and the vibration of the target floor can be further prevented.

  Further, in the present embodiment, the polished stainless steel plates 24, 25, 26 are joined to the angle 21 and the angle 22 in order to improve the sliding of the low friction materials 41, 42, but these polished stainless steel plates 24, 25, The low friction materials 41 and 42 may be brought into direct contact with the surfaces of the angle 21 and the angle 22 without providing the 26.

(About the vibration floor)
In this embodiment, the vibration floor is described as one floor (the third floor). However, even when vibration floors are formed across a plurality of floors, the target floor is the same as in this embodiment. It is possible to reduce the vibration. At this time, it is possible to prevent the vibration floors from resonating by providing the reinforcing portion 10 so that the natural frequencies of the vibration floors of the respective vibration floors have different values.

(Appendix)
The building structure of appendix 1 reduces the vibration generated on the target floor existing on the target floor of the same building as the vibration floor as the vibration floor existing on the vibration floor is excited by the vibration source to excite the vibration. A transmission preventing means for preventing the vibration of the vibration floor from being transmitted to the target floor via a wall positioned between the vibration floor and the target floor; And a frequency variable means for making the natural frequency of the vibration floor different from the natural frequency of the target floor.

  The building structure according to appendix 2 is the building structure according to appendix 1, wherein the transmission preventing means at least vertically places the vibration floor and a wall positioned between the vibration floor and the target floor. The sliding means is slidably connected to each other along the direction.

  The building structure according to appendix 3 is the building structure according to appendix 1 or 2, wherein the frequency variable means is a reinforcing means that reinforces the beam supporting the vibration floor.

  The building structure according to appendix 4 is the building structure according to appendix 3, wherein the reinforcing means reinforces the longest beam among the beams that support the vibration floor.

(Additional effects)
According to the building structure described in appendix 1, by providing the transmission preventing means, it is possible to prevent the vibration of the vibration floor from being transmitted to the target floor through the wall, and by adding the frequency changing means. Since the vibration floor and the target floor can be prevented from resonating, the vibration of the target floor can be further reduced.

  According to the building structure described in appendix 2, the vibration floor and the wall from the vibration floor to the target floor are slidably connected by the sliding means at least along the vertical direction. It is possible to prevent the vertical displacement from being transmitted to the target floor with a very simple configuration.

  According to the building structure described in appendix 3, since the reinforcing means for reinforcing the beam supporting the vibration floor is provided, the natural frequency of the vibration floor and the natural frequency of the target floor are different depending on a very simple configuration. It becomes possible to make it.

  According to the building structure described in appendix 4, the reinforcing means reinforces the longest beam among the beams that support the vibration floor, so that the natural frequency of the vibration floor and the natural frequency of the target floor are efficiently obtained. Can be different.

1 Building Structure 1P to 5P 1st Floor Column to 5th Floor Column 1L to 5L 1st Floor Beam to 5th Floor Beam 1W to 5W 1st Floor Wall to 5th Floor Wall 1F to 5F 1st Floor to 5th Floor 6L Ceiling Beam 10 Reinforcement Section 20 Insulating portion 21 Angle 21a Horizontal piece 21b Vertical piece 22 Angle 22a Parallel piece 22b Orthogonal piece 23 Connection bolt 23a Washer 23b Nut 24 Polished stainless steel plate 25 Polished stainless steel plate 26 Polished stainless steel plate 30 Beam connecting portion 41 Low friction material 42 Low friction material

Claims (2)

As the excitation floor existing on the vibration floor is excited by a vibration source to excite vibration, the building structure reduces vibrations generated on the target floor existing on the target floor of the same building as the vibration floor,
Transmission preventing means for preventing vibration of the vibration floor from being transmitted to the target floor via a wall positioned between the vibration floor and the target floor;
A frequency variable means for making the natural frequency of the vibration floor different from the natural frequency of the target floor ,
The frequency variable means is a reinforcing means for reinforcing a beam supporting the vibration floor,
The reinforcing means is means for reinforcing the longest beam among the beams supporting the excitation floor,
Transmission preventing means is provided at a plurality of positions along the longitudinal direction of the longest beam between the longest beam and the wall adjacent to the longest beam among the walls.
Building structure. The transmission preventing means is a sliding means for connecting the vibration floor and a wall located between the vibration floor and the target floor so as to be slidable at least along the vertical direction.
The building structure according to claim 1.

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