Building floor structure

Abstract

To provide a building floor structure excellent in sound insulation with fireproof performance.SOLUTION: A building floor structure 100 includes: a floorboard 60 on the upper floor of the building; and a beam 10 supporting the floorboard 60. A plurality of vibration-isolating materials 40 are continuously attached to the beam 10 in the longitudinal direction of the beam 10. The vibration-isolating materials 40 have a first portion and a second portion having different widths that intersect with the longitudinal direction of the beam 10. The width of the second portion is wider than the width of the first portion, and the first portion and the second portion support the floorboard 60.SELECTED DRAWING: Figure 1

Description

Technical Field

[0005]

[0001] The present invention relates to a floor structure of a building.

Background Art

[0002] The floor impact sound of the upper floor of a building is transmitted downward to the ceiling of the lower floor through the vibration of the upper floor, and is radiated to the lower floor by exciting the ceiling of the lower floor. This floor impact sound includes heavy floor impact sound and lightweight floor impact sound.

[0003] A conventional anti-vibration floor structure is formed, for example, by attaching a strip-shaped anti-vibration material on the upper surface of a steel frame beam (such as H-shaped steel or channel steel), or attaching piece-shaped anti-vibration materials at intervals, and placing a floor slab that forms the upper floor on the anti-vibration materials (see, for example, Patent Document 1). This floor slab is a dry floor slab (dry floor), and an ALC (autoclaved lightweight concrete) floor slab (ALC panel) can be cited as an example. For example, when the floor receives heavy floor impact sound, the elasticity of the anti-vibration material on the steel frame beam reduces the frequency of the heavy floor impact sound, and sound insulation performance is exhibited.

[0004] By the way, the smaller the spring constant of the above anti-vibration material (the softer the anti-vibration material), the higher the frequency reduction effect of the floor impact sound, but there is a contradiction that the load-bearing capacity of the anti-vibration material becomes smaller due to the small spring constant, and it becomes difficult to support a relatively heavy floor slab. Also, due to the small spring constant, there is a contradiction that creep of the anti-vibration material is likely to progress, and it becomes difficult to exhibit stable sound insulation performance over time.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the floor structure described in Patent Document 1, multiple piece-shaped vibration-damping materials are arranged at predetermined intervals along the longitudinal direction of the beam, and floorboards are placed on top of these vibration-damping materials. While such a floor structure has excellent sound insulation performance, there was room for improvement in its fire resistance performance.

[0007] This invention has been made in view of the above problems, and aims to provide a building floor structure that has excellent sound insulation performance and fire resistance. [Means for solving the problem]

[0008] To achieve the aforementioned objective, one embodiment of the building floor structure according to the present invention is: A building floor structure comprising floorboards for the upper floor of a building and beams supporting said floorboards, A vibration-damping material is attached to the beam, which is continuous in the longitudinal direction of the beam. The vibration-damping material has a first portion and a second portion with different widths that intersect the longitudinal direction of the beam. The width of the second portion is wider than the width of the first portion. The first and second portions are characterized in that they support the floorboard.

[0009] In this embodiment, since the vibration-damping material is arranged continuously in the longitudinal direction of the beam, the gap between the beam and the floorboard can be continuously sealed in the longitudinal direction of the beam, thereby suppressing the entry of flames. In this embodiment, fire resistance can be improved compared to conventional technology in which multiple vibration-damping materials are arranged at predetermined intervals in the longitudinal direction of the beam. Furthermore, in this embodiment, since the vibration-damping material has a first part and a second part with different widths intersecting the longitudinal direction of the beam, the width of the vibration-damping material can be changed at different positions in the longitudinal direction of the beam. This makes it possible to arrange parts of the vibration-damping material at predetermined intervals in the longitudinal direction of the beam. By arranging parts of the vibration-damping material with different widths at predetermined intervals in the longitudinal direction of the beam in this way, sound insulation performance can be achieved. In this embodiment, a structure can be adopted that has both parts of the vibration-damping material arranged continuously along the longitudinal direction of the beam and parts of the vibration-damping material arranged at predetermined intervals in the longitudinal direction of the beam, thereby realizing a building floor structure that has excellent sound insulation performance and fire resistance performance.

[0010] In another embodiment of the present invention, The vibration-damping material comprises a linear first vibration-damping section continuous in the longitudinal direction of the beam, It includes a plurality of second vibration-damping units formed separately from the first vibration-damping unit and arranged at predetermined intervals in the longitudinal direction of the beam, The width of the first portion is the width of the first vibration-damping section. The width of the second portion is characterized by being the sum of the width of the first vibration-damping section and the width of the second vibration-damping section.

[0011] According to this embodiment, since the beam has a linear first vibration-damping section that is continuous in the longitudinal direction of the beam, fire resistance can be provided by this first vibration-damping section, and sound insulation can be provided by a plurality of second vibration-damping sections arranged at predetermined intervals in the longitudinal direction of the beam. Furthermore, according to this embodiment, since the linear first vibration-damping section and the plurality of second vibration-damping sections are separate components, the second vibration-damping sections can be arranged regardless of the arrangement of the first vibration-damping section. In addition, the spacing between the plurality of second vibration-damping sections can be changed as appropriate. For example, at the construction site, the arrangement of the plurality of second vibration-damping sections can be changed as appropriate, taking into account the positional relationship with the floorboards.

[0012] In another embodiment of the present invention, The vibration-damping material comprises a linear first vibration-damping section continuous in the longitudinal direction of the beam, It includes a plurality of second vibration-damping sections formed integrally with the first vibration-damping section and arranged at predetermined intervals in the longitudinal direction of the beam, The width of the first portion is the width of the first vibration-damping section. The width of the second portion is characterized by being the sum of the width of the first vibration-damping section and the width of the second vibration-damping section.

[0013] According to this embodiment, since the linear first vibration damping section and the plurality of second vibration damping sections are formed integrally, the positional relationship of the plurality of second vibration damping sections with respect to the first vibration damping section can be fixed.

[0014] In another embodiment of the present invention, The first vibration-damping section is positioned along the end of the beam that is aligned with the longitudinal direction, The second vibration isolation section is characterized by being positioned closer to the center than the first vibration isolation section in the width direction of the beam.

[0015] According to this embodiment, a linear first vibration-damping section, which is continuous in the longitudinal direction of the beam, is arranged continuously along the end of the beam that is aligned in the longitudinal direction. Furthermore, since the linear first vibration-damping section can be arranged along the end of the beam that is aligned in the longitudinal direction, the positioning of the first vibration-damping section is easy, and the installation of the first vibration-damping section is easy.

[0016] In another embodiment of the present invention, The end of the floorboard along the longitudinal direction of the beam is characterized in that it is supported by the second vibration-damping section.

[0017] According to this aspect, since the end portion along the longitudinal direction of the floor slab beam is supported by the second vibration isolators arranged at a predetermined interval in the longitudinal direction of the beam, even when the floor slab is displaced in the width direction of the beam, the reduction ratio of the area of the vibration isolation material receiving the floor slab can be made lower compared to the configuration in which the end portion along the longitudinal direction of the floor slab is supported by the first vibration isolators. For example, even if the floor slab is slightly displaced from its initial construction position, the influence of the displacement of the floor slab can be suppressed to a low level.

[0018] Also, in another aspect of the present invention, the second vibration isolator is characterized by supporting a plurality of the floor slabs adjacent to each other in the longitudinal direction of the beam.

[0019] According to this aspect, the second vibration isolator is arranged at the position of the boundary where a plurality of floor slabs are adjacent to each other, and both floor slabs can be supported by the second vibration isolator. Also, by supporting the end portions spaced apart in the longitudinal direction of the beam on one floor slab respectively by a plurality of second vibration isolators spaced apart in the longitudinal direction of the beam, the floor slab can be stably supported.

[0020] Also, in another aspect of the present invention, a buffer material is arranged between a plurality of the second vibration isolators adjacent to each other in the longitudinal direction of the beam, and the spring constant of the buffer material is characterized by being lower than the spring constant of the vibration isolation material.

[0021] According to this aspect, by filling the gap between a plurality of second vibration isolators adjacent to each other in the longitudinal direction of the beam with the buffer material, the fire resistance performance can be improved. Also, since the spring constant of the buffer material is lower than the spring constant of the second vibration isolator, the buffer material does not adversely affect the sound insulation performance by the second vibration isolator.

Effect of the Invention

[0022] As can be understood from the above description, according to the floor structure of the building of the present invention, it is possible to provide a floor structure of a building having excellent sound insulation performance and fire resistance performance.

Brief Description of the Drawings

[0023] [Figure 1] This is an exploded perspective view of a part of an example of the floor structure of a building according to the first embodiment. [Figure 2] This is a longitudinal cross-sectional view of an example of a building floor structure according to the first embodiment. [Figure 3] This is an enlarged cross-sectional view of a part of an example of a building floor structure according to the first embodiment. [Figure 4] This is a partial plan view of an example of the floor structure of a building according to the first embodiment. [Figure 5] This is a partial plan view of an example of the floor structure of a building according to the second embodiment. [Figure 6] This is a partial floor plan of an example of the floor structure of a building according to the third embodiment. [Modes for carrying out the invention]

[0024] The vibration-isolating floor structures according to each embodiment will be described below with reference to the attached drawings. In this specification and the drawings, substantially identical components may be denoted by the same reference numerals to avoid redundant explanations.

[0025] [Building floor structure according to the first embodiment] First, an example of a building floor structure according to the first embodiment will be described with reference to Figures 1 to 4. Here, Figure 1 is an exploded perspective view of a part of the example of a building floor structure according to the first embodiment. Figure 2 is a longitudinal cross-sectional view of an example of a building floor structure according to the first embodiment. Figure 3 is an enlarged cross-sectional view of a part of the example of a building floor structure according to the first embodiment. Figure 4 is a plan view of a part of the example of a building floor structure according to the first embodiment. Figure 1 shows the vibration-damping material 40 and floor plate 60 on one side of the beam 10, and omits the illustration of the vibration-damping material 40 and floor plate 60 on the other side, and further omits the various mat materials that make up the floor 50. Also, in Figure 4, the floor plate 60 is shown by dashed lines. In each figure, arrows indicating the X-axis direction, Y-axis direction, and Z-axis direction are shown as appropriate, representing three mutually orthogonal directions. The Y-axis direction follows the longitudinal direction of the beam 10. The X-axis direction follows the width direction intersecting the longitudinal direction of the beam 10. The Z-axis direction follows the vertical direction.

[0026] The illustrated building floor structure 100 has a floor 50 on the upper floors of the building (for example, the second or third floor) and beams 10 that support the floor 50. In the illustrated example, the beam 10 is formed from an H-shaped steel having a web 11, an upper flange 12, and a lower flange 13.

[0027] A vibration-damping material 40 is placed on the upper surface 12a of the upper flange 12 of the beam 10. The vibration-damping material 40 is arranged continuously along the longitudinal direction of the beam 10. The longitudinal direction of the vibration-damping material 40 is along the longitudinal direction of the beam 10. The vibration-damping material 40 has a first vibration-damping section 41 that is continuous in the longitudinal direction of the beam 10, and The beam 10 includes a plurality of second vibration isolation sections 42 arranged at predetermined intervals along its longitudinal direction. The second vibration isolation sections 42 are formed separately from the first vibration isolation section 41. Between a plurality of adjacent second vibration isolation sections 42 along the longitudinal direction of the beam 10, a region S1 is formed where no vibration isolation material 40 is placed.

[0028] The width W41 of the first vibration isolation section 41 intersecting the beam 10 in the longitudinal direction is narrower than the width W42 of the second vibration isolation section 42. In other words, the width W42 of the second vibration isolation section 42 is wider than the width W41 of the first vibration isolation section 41. The vibration isolation material 40 has a first part and a second part with different widths intersecting the beam 10 in the longitudinal direction. The width of the second part is wider than the width of the first part. In the vibration isolation material 40, the width of the first part is the width W41 of the first vibration isolation section 41, and the width of the second part is the width W40 of the vibration isolation material 40, which is the sum of the width W41 of the first vibration isolation section 41 and the width W42 of the second vibration isolation section 42.

[0029] The first vibration-damping section 41 has ends 41a and 41b extending in the longitudinal direction. The ends 41a and 41b are spaced apart from each other in the width direction of the first vibration-damping section 41. The end 41a of the first vibration-damping section 41 is positioned outward in the width direction of the beam 10. In the width direction of the beam 10, the side closer to the web 11 is considered the inside, and the side further from the web 11 is considered the outside.

[0030] The upper flange 12 of the beam 10 has ends 12c and 12d extending in the longitudinal direction. End 12c is one end in the width direction of the beam 10, and end 12d is the other end. The end 41a of the first vibration-damping section 41 closer to end 12c is positioned along the end 12c of the upper flange 12. The end 41a of the first vibration-damping section 41 closer to the end 12d of the upper flange 12 is positioned along the end 12d of the upper flange 12.

[0031] The second vibration isolation section 42 is positioned closer to the web 11 of the beam 10 than the first vibration isolation section 41 in the width direction of the beam 10. The web 11 is an example of the center of the beam 10 in the width direction.

[0032] The second vibration-damping section 42 has longitudinally extending ends 42a and 42b. The ends 42a and 42b are spaced apart from each other in the width direction of the second vibration-damping section 42. The end 42a of the second vibration-damping section 42 is adjacent to the end 41a of the first vibration-damping section 41 in the width direction of the beam 10. The end 42b of the second vibration-damping section 42 is positioned closer to the web 11 in the width direction of the beam 10. Alternatively, in the width direction of the beam 10, the second vibration-damping section 42 may be positioned at the ends 12c and 12d of the upper flange 12, and the first vibration-damping section 41 may be positioned closer to the web 11 than the second vibration-damping section 42.

[0033] Multiple floor slabs 60 are arranged in the longitudinal direction of the beam 10. The longitudinal direction of the floor slabs 60 intersects with the longitudinal direction of the beam 10. The longitudinal ends 60a of the floor slabs 60 are supported by vibration-damping material 40. The longitudinal ends 60a of the floor slabs 60 are supported by the beam 10 via the vibration-damping material 40. The vibration-damping material 40 is sandwiched vertically between the floor slabs 60 and the upper flange 12.

[0034] The end face 60b of the floor plate 60 is a surface that intersects the longitudinal direction of the floor plate 60 and is aligned with the YZ plane. The end face 60b of the floor plate 60 is included in the end portion 60a of the beam 10 that is aligned with the longitudinal direction. The end face 60b of the floor plate 60 is supported by the second vibration isolation portion 42 of the vibration isolation material 40. The end face 60b of the floor plate 60 is positioned to be aligned with the end 42b of the second vibration isolation portion 42. For example, in the plan view shown in Figure 4, the end face 60b of the floor plate 60 may overlap with the end 42b of the second vibration isolation portion 42. The end face 60b may be offset from the end 42b of the second vibration isolation portion 42.

[0035] The floor slab 60 has an end 60c along its longitudinal direction. The end 60c of the floor slab 60 along its longitudinal direction is positioned to intersect with the longitudinal direction of the beam 10. Multiple second vibration isolation units 42 are positioned in the longitudinal direction of the beam 10 at locations corresponding to the end 60c of the floor slab 60 along its longitudinal direction. In one floor slab 60, the ends 60c spaced apart in the longitudinal direction of the beam 10 are each supported by different second vibration isolation units 42. One second vibration isolation unit 42 supports the ends 60c of two floor slabs 60 that are adjacent in the longitudinal direction of the beam 10.

[0036] The region S1 between the multiple second vibration isolation sections 42 is formed at a position corresponding to the center of the floor plate 60 in the longitudinal direction of the beam 10. One region S1 is formed for each floor plate 60. Multiple regions S1 may be provided depending on the length of the floor plate 60 in the longitudinal direction of the beam 10.

[0037] As shown in Figure 3, a gap is formed between the floorboard 60 located on one side and the floorboard 60 located on the other side in the width direction of the beam 10. Similarly, a gap is formed between the vibration-damping material 40 located on one side and the vibration-damping material 40 located on the other side in the width direction of the beam 10.

[0038] The vibration-damping material 40 is formed from, for example, foamed urethane (polyurethane), rubber, or a viscoelastic material such as elastomer. The first vibration-damping section 41 and the second vibration-damping section 42 are made of the same material, for example. The vibration-damping material 40 has vibration-damping and flame-retardant properties. The first vibration-damping section 41 and the second vibration-damping section 42 may be made from different materials.

[0039] The thickness of the first vibration-damping section 41 and the thickness of the second vibration-damping section 42 are, for example, the same. The width W41 of the first vibration-damping section 41 may be, for example, 25% of the width W42 of the second vibration-damping section 42. The width W41 of the first vibration-damping section 41 may be 20% or more and 30% or less of the width W42 of the second vibration-damping section 42. The thicknesses of the first vibration-damping section 41 and the second vibration-damping section 42 may be different.

[0040] The length L42 of the second vibration isolation section 42 along the longitudinal direction of the beam 10 may be, for example, 70% of the length L60 of the floor plate 60 along the longitudinal direction of the beam 10. The length L42 of the second vibration isolation section 42 may also be 65% or more and 75% or less of the length L60 of the floor plate 60.

[0041] The floor 50 comprises a plurality of dry floor slabs 60 and a floor mat 70 laid on top of the plurality of floor slabs 60 laid horizontally. The floor slabs 60 can be the ALC floor slabs or precast concrete floor slabs (PCa floor slabs, PCa panels) as described above.

[0042] The floor mat 70 in the illustrated example is formed by laminating a double layer of soundproofing mats 71 and 72, a particleboard 73, and a floor mat 74.

[0043] Next, the construction method for the building's floor structure 100 will be explained. First, the structural frame of the building, consisting of columns and beams 10, is constructed on site. The first vibration-damping section 41 is placed on the upper surface 12a of the upper flange 12 of the beam 10. The first vibration-damping section 41 can be attached to the upper flange 12, for example, using double-sided tape. The first vibration-damping section 41 is arranged to be continuous along the longitudinal direction of the beam 10.

[0044] Next, a plurality of second vibration damping units 42 are placed on the upper surface 12a of the upper flange 12 of the beam 10. The plurality of second vibration damping units 42 are arranged adjacent to the first vibration damping unit 41 in the width direction of the beam 10. The plurality of second vibration damping units 42 are arranged at predetermined intervals in the longitudinal direction of the beam 10. The second vibration damping units 42 can be attached to the upper flange 12, for example, using double-sided tape. The first vibration damping unit 41 and the second vibration damping unit 42 may also be attached to the beam 10 by adhesive, for example, or by other methods. The first vibration damping unit 41 and the second vibration damping unit 42 may simply be placed on the upper surface 12a of the upper flange 12.

[0045] After attaching the vibration-damping material 40 to the beam 10, multiple floorboards 60 are placed. The multiple floorboards 60 are placed on the vibration-damping material 40. As described above, the end faces 60b of the floorboards 60 are positioned along the end 42b of the second vibration-damping section 42. The ends 60a of the floorboards 60 are supported by the second vibration-damping section 42. The ends 60c of the floorboards 60 are positioned to overlap with the second vibration-damping section 42 in the longitudinal direction of the beam 10.

[0046] Next, the floorboards 60 are fixed to the beams 10. The floorboards 60 are fixed to the beams 10 using, for example, fasteners, bolts and nuts. Other methods may be used to fix the floorboards 60 to the beams 10. After fixing the floorboards 60, the floor mats 70 are laid on top of the floorboards 60.

[0047] Furthermore, the order of construction in the building's floor structure 100 can be changed as appropriate. For example, the floorboards 60 may be attached to the beams 10 in advance at the factory. Alternatively, the beams 10 with the vibration-damping material 40 installed may be transported to the site and then constructed on-site. Alternatively, the first vibration-damping section 41 may be installed on the beams 10 after the second vibration-damping section 42 has been installed on the beams 10.

[0048] In the building floor structure 100 according to this embodiment, the first vibration-damping section 41 of the vibration-damping material 40 is arranged linearly so as to be continuous in the longitudinal direction of the beam 10, so that the gap between the beam 10 and the floor plate 60 can be continuously sealed in the longitudinal direction of the beam 10. The first vibration-damping section 41 can suppress the entry of flames. In the building floor structure 100, the fire resistance performance can be improved compared to the conventional technology in which multiple piece-shaped vibration-damping materials are arranged at predetermined intervals in the longitudinal direction of the beam 10.

[0049] Furthermore, according to the building's floor structure 100, the width of the vibration-damping material 40 can be changed in the longitudinal direction of the beam 10 between the part where the second vibration-damping section 42 is located and the part where the second vibration-damping section 42 is not located. In the building's floor structure 100, multiple second vibration-damping sections 42 are arranged at predetermined intervals in the longitudinal direction of the beam 10, so these second vibration-damping sections 42 can provide sound insulation performance.

[0050] In the building's floor structure 100, a structure can be adopted that has both a first vibration-damping section 41 that is continuously arranged along the longitudinal direction of the beam 10 and a second vibration-damping section 42 that is arranged at predetermined intervals along the longitudinal direction of the beam 10, thereby realizing a building's floor structure 100 that has excellent sound insulation performance and fire resistance performance.

[0051] While conventional techniques, which involve arranging piece-shaped vibration-damping materials at predetermined intervals, have the advantage of making it easier to obtain the appropriate amount of distortion in the vibration-damping materials, there was room for improvement in fire resistance performance because a gap was created between the beam 10 and the floorboard 60.

[0052] Furthermore, in order to fill the gap between the beam 10 and the floorboard 60, it was not easy to obtain the required floor impact sound insulation performance with a configuration consisting only of linear vibration-damping material continuous in the longitudinal direction of the beam 10. To obtain the required floor impact sound insulation performance, it is necessary to reduce the amount of distortion of the vibration-damping material, and for that purpose, the hardness of the linear vibration-damping material must be softer than that of the piece-shaped vibration-damping material. However, softening the vibration-damping material leads to the problem of reduced compression creep performance.

[0053] In the building floor structure 100 of this embodiment, the floor plate 60 is supported by the first vibration-damping section 41 and the second vibration-damping section 42. Compared to a configuration that only has linear vibration-damping material, the area of ​​the vibration-damping material 40 supporting the floor plate 60 can be increased. This reduces the load per unit area received by the linear first vibration-damping section 41, and suppresses the decrease in the compression creep performance of the first vibration-damping section 41. The overall compression creep performance of the vibration-damping material 40, which includes the first vibration-damping section 41 and the second vibration-damping section 42, can be improved. In the building floor structure 100 of this embodiment, high levels of sound insulation performance, fire resistance performance, and compression creep performance can be achieved.

[0054] The dimensions of the first vibration-damping section 41 and the second vibration-damping section 42 can be appropriately determined according to the weight of the floor plate 60. The dimensions of the first vibration-damping section 41 are determined so as not to adversely affect the sound insulation performance of the second vibration-damping section 42. The natural frequency of the building floor structure 100 in this embodiment is approximately the same as the natural frequency of a configuration equipped only with multiple second vibration-damping sections 42, and the first vibration-damping section 41 does not adversely affect the sound insulation performance of the second vibration-damping section 42.

[0055] Furthermore, in the building's floor structure 100, since the first vibration isolation section 41 and the second vibration isolation section 42 are separate components, the first vibration isolation section 41 and the second vibration isolation section 42 can be installed separately on the beam 10. Also, because the first vibration isolation section 41 and the second vibration isolation section 42 are separate components, the positional relationship between the first vibration isolation section 41 and the second vibration isolation section 42 can be adjusted as needed. In addition, the spacing between multiple second vibration isolation sections 42 can be changed as needed. For example, at the construction site, the arrangement of multiple second vibration isolation sections 42 can be changed as needed, taking into account their positional relationship with the floor slab 60.

[0056] Furthermore, in the building's floor structure 100, the first vibration-damping section 41 is positioned along the end 12c of the beam 10 in the longitudinal direction, and the second vibration-damping section 42 is positioned closer to the web 11 of the beam 10 than the first vibration-damping section 41 in the width direction of the beam 10. With a building floor structure 100 configured in this way, the linear first vibration-damping section 41, which is continuous in the longitudinal direction of the beam 10, is positioned along the end 12c of the beam 10 in the longitudinal direction, so that the linear first vibration-damping section 41 that exhibits fire resistance performance can be continuously positioned along the end 12c of the upper flange 12. In addition, since the linear first vibration-damping section 41 can be positioned along the end 12c of the beam 10 in the longitudinal direction, the positioning of the first vibration-damping section 41 is easy, and the first vibration-damping section 41 is easy to install.

[0057] Furthermore, in the building's floor structure 100, the end portion 60a of the floor plate 60 that aligns with the longitudinal direction of the beam 10 is supported by the second vibration isolation portion 42. With this configuration of the building's floor structure 100, since the end portion 60a of the floor plate 60 is supported by the second vibration isolation portion 42, which is arranged at predetermined intervals along the longitudinal direction of the beam 10, even if the floor plate 60 shifts in the width direction of the beam 10, the reduction in the area of ​​the vibration isolation material 40 that supports the floor plate 60 can be reduced compared to a configuration in which the end portion 60a of the floor plate 60 is supported by the first vibration isolation portion 41. For example, even if the floor plate 60 shifts slightly from its design position, the impact of the displacement of the floor plate 60 can be kept to a minimum. If the first vibration-damping section 41 is positioned close to the web 11 and the second vibration-damping section 42 is positioned close to the end 12c, and the end face 60b of the floor plate 60 is supported by the first vibration-damping section 41, then when the floor plate 60 shifts closer to the end 12c, the area in contact with the linear first vibration-damping section 41 decreases significantly. In this embodiment, in the region S1 between the second vibration-damping sections 42, the floor plate 60 is not in contact with the vibration-damping material 40, so the reduction in the contact area between the second vibration-damping section 42 and the floor plate 60 is smaller compared to the opposite configuration. In the building floor structure 100 according to this embodiment, even if the floor plate 60 shifts, the deviation from the design values ​​for sound insulation performance and compression creep performance can be kept to a minimum.

[0058] Furthermore, in the building's floor structure 100, one second vibration isolation unit 42 supports multiple floor slabs 60 adjacent to each other in the longitudinal direction of the beam 10. With this configuration of the building's floor structure 100, the second vibration isolation unit 42 is positioned at the boundary where multiple floor slabs 60 are adjacent to each other, and both floor slabs 60 can be supported by the second vibration isolation unit 42. In addition, the multiple second vibration isolation units 42, which are spaced apart in the longitudinal direction of the beam 10, support the ends 60c of each floor slab 60 that are spaced apart in the longitudinal direction of the beam 10, thereby providing stable support for the floor slabs 60.

[0059] [Building floor structure according to the second embodiment] Next, an example of a building floor structure according to the second embodiment will be described with reference to Figure 5. Here, Figure 5 is a partial plan view of an example of a building floor structure according to the second embodiment.

[0060] The difference between the building floor structure 100B of the second embodiment shown in Figure 5 and the building floor structure 100 of the first embodiment is that a buffer material 81 is placed between a plurality of adjacent second vibration-damping sections 42 in the longitudinal direction of the beam 10. In the description of the building floor structure 100B of the second embodiment, the same explanation as that of the building floor structure 100 of the first embodiment will be omitted.

[0061] The dynamic spring constant (N / mm) of the cushioning material 81 is lower than the dynamic spring constant (N / mm) of the second vibration isolation section 42. The dynamic spring constant of the cushioning material 81 may be, for example, 15% or more and 20% or less of the dynamic spring constant of the second vibration isolation section 42. The thickness of the cushioning material 81 may be the same as, for example, the thickness of the second vibration isolation section 42. The width of the cushioning material 81 may be the same as the width W42 of the second vibration isolation section 42. The length of the cushioning material 81 along the longitudinal direction of the beam 10 is the same as the length LS1 of the region S1 shown in Figure 4. The material of the cushioning material 81 may be, for example, foamed urethane, rubber, elastomer, etc.

[0062] In this second embodiment of the building floor structure 100B, the same effects and advantages as in the first embodiment of the building floor structure 100 are achieved. In this building floor structure 100B, the gaps between multiple adjacent second vibration-damping sections in the longitudinal direction of the beam 10 can be filled with a buffer material 81 to improve fire resistance. Furthermore, since the dynamic spring constant of the buffer material 81 is lower than the dynamic spring constant of the second vibration-damping section 42, the buffer material 81 does not adversely affect the sound insulation performance of the second vibration-damping section 42. Note that the static spring constant of the buffer material 81 may also be lower than the static spring constant of the second vibration-damping section 42.

[0063] [Building floor structure according to the third embodiment] Next, an example of a building floor structure according to the third embodiment will be described with reference to Figure 6. Here, Figure 6 is a partial plan view of an example of a building floor structure according to the third embodiment.

[0064] The difference between the building floor structure 100C of the third embodiment shown in Figure 6 and the building floor structure 100 of the first embodiment is that, instead of the vibration-damping material 40 in which the first vibration-damping section 41 and the second vibration-damping section 42 are formed separately, the third embodiment includes a vibration-damping material 40C in which the first vibration-damping section 41 and the second vibration-damping section 42 are formed as a single unit. In the description of the building floor structure 100C of the third embodiment, the same explanation as that of the building floor structure 100 of the first embodiment will be omitted.

[0065] The vibration-damping material 40C can be formed, for example, by cutting out a portion corresponding to region S1 from a strip-shaped vibration-damping material having a width W40.

[0066] In this third embodiment of the building floor structure 100C, the same effects and advantages as in the first embodiment of the building floor structure 100 are achieved. In the building floor structure 100C, since the linear first vibration-damping section 41 and the plurality of second vibration-damping sections 42 are formed integrally, the positional relationship of the plurality of second vibration-damping sections 42 with respect to the first vibration-damping section 41 can be fixed. Positional displacement of the second vibration-damping sections 42 with respect to the first vibration-damping section 41 is suppressed.

[0067] In addition, in the building floor structure 100C according to the third embodiment, a cushioning material 81 may be placed in the region S1 between the second vibration isolation sections 42, similar to the second embodiment.

[0068] [Performance evaluation experiment] The inventors conducted an experiment to evaluate the performance of the building floor structure 100 according to the first embodiment. In this experiment, the building floor structure 100 was used as the example, and a floor structure equipped with a vibration-damping material consisting only of a plurality of second vibration-damping sections 42 instead of the vibration-damping material 40 was used as the comparative example. The vibration-damping material of the comparative example floor structure does not have a linear first vibration-damping section 41. The other beams 10, second vibration-damping sections 42, floorboards 60 and floor mats 70 are the same in the example and the comparative example.

[0069] Heavy impact sound was generated on the floor surface of the floor structures constituting each of the examples and comparative examples, and the floor impact sound level was measured in the room on the floor below. Specifically, a tire was dropped onto the floor of the upper floor, and the floor impact sound level was measured in the room on the floor below. The measurement results of the comparative example were used as a benchmark (BM), and the difference in floor impact sound levels between the comparative example and the example was calculated. The experimental results are shown in Table 1.

[0070] [Table 1]

[0071] Table 1 demonstrates that the example has sound insulation performance equivalent to that of the comparative example.

[0072] Furthermore, other embodiments may be used in which other components are combined with the configurations listed in the above embodiments, and the present invention is not limited in any way to the configurations shown herein. In this regard, modifications can be made without departing from the spirit of the present invention, and can be appropriately determined according to the application form.

[0073] [Differentiation] In the above embodiment, the vibration-damping material 40 and the floor plate 60 are arranged to be in contact with each other, but the floor plate 60 may be supported by the vibration-damping material 40, for example, via support hardware. Furthermore, the vibration-damping material 40 is not limited to being placed on the upper surface 12a of the upper flange 12 of the beam 10, but may also be placed on support hardware attached to the beam 10.

[0074] Furthermore, in the above embodiment, multiple second vibration-damping sections 42 are formed adjacent to a linear first vibration-damping section 41, but for example, a gap may be formed between the first vibration-damping section 41 and the second vibration-damping section 42.

[0075] Furthermore, although an H-shaped steel beam is used as an example in the above embodiment, the beam 10 is not limited to an H-shaped steel beam. For example, the beam 10 may be a square steel pipe or a piece of wood with a rectangular cross-section. [Explanation of symbols]

[0076] 10: Beam (H-shaped steel) 11: Web 12: Upper flange 12a:Top surface 12c: Edge 12d: Edge 13: Lower flange 40,40B: Vibration isolation material 41: First vibration isolation section 41a, 41b: Edge 42: Second vibration isolation section 42a, 42b: Edge 50: Floor 60: Floorboards 60a: End 60b: End face 60c: edge 70: Floor mat 71,72: Soundproofing mat 73: Particleboard 74: Floor Mats 81: Cushioning material 100, 100B, 100C: Building floor structure S1: Area W40: Width of vibration damping material W41: Width of the first vibration isolation section W42: Width of the second vibration damping section

Claims

1. A building floor structure comprising floorboards for the upper floor of a building and beams supporting said floorboards, A vibration-damping material is attached to the beam, which is continuous in the longitudinal direction of the beam. The vibration-damping material has a first part and a second part with different widths that intersect the longitudinal direction of the beam. The width of the second portion is wider than the width of the first portion. The vibration-damping material includes a linear first vibration-damping section continuous in the longitudinal direction of the beam, and a plurality of second vibration-damping sections arranged at predetermined intervals in the longitudinal direction of the beam. The first vibration-damping section is positioned along the end of the beam that is aligned with the longitudinal direction, The second vibration isolation section is positioned closer to the center than the first vibration isolation section in the width direction of the beam. The thickness of the first vibration-damping section and the thickness of the second vibration-damping section are the same. The width of the second vibration-damping section is wider than the width of the first vibration-damping section. The width of the first portion is the width of the first vibration-damping section. The width of the second portion is the sum of the width of the first vibration-damping section and the width of the second vibration-damping section. A building floor structure characterized in that the first part and the second part support the floorboard.

2. The building floor structure according to Claim 1, characterized in that the second vibration isolation section is formed separately from the first vibration isolation section.

3. The building floor structure according to claim 1, characterized in that the second vibration-damping section is formed integrally with the first vibration-damping section.

4. The floor structure of a building according to any one of claims 1 to 3, characterized in that the end of the floor board along the longitudinal direction of the beam is supported by the second vibration-damping section.

5. The floor structure of a building according to any one of claims 1 to 4, characterized in that the second vibration-damping section supports a plurality of floor slabs adjacent to each other in the longitudinal direction of the beam.

6. A building floor structure comprising a floor slab for the upper floor of the building and beams supporting the floor slab, A vibration-damping material is attached to the beam, which is continuous in the longitudinal direction of the beam. The vibration-damping material has a first part and a second part with different widths that intersect the longitudinal direction of the beam. The width of the second portion is wider than the width of the first portion. The first part and the second part support the floorboard, The vibration-damping material comprises a linear first vibration-damping section continuous in the longitudinal direction of the beam, It includes a plurality of second vibration-damping units formed separately from the first vibration-damping unit and arranged at predetermined intervals in the longitudinal direction of the beam, The width of the first portion is the width of the first vibration-damping section. The width of the second portion is the sum of the width of the first vibration-damping section and the width of the second vibration-damping section. Between a plurality of adjacent second vibration-damping sections in the longitudinal direction of the beam, a buffer material is placed. A building floor structure characterized in that the spring constant of the cushioning material is lower than the spring constant of the vibration-damping material.

7. A building floor structure comprising a floor slab for the upper floor of the building and beams supporting the floor slab, A vibration-damping material is attached to the beam, which is continuous in the longitudinal direction of the beam. The vibration-damping material has a first part and a second part with different widths that intersect the longitudinal direction of the beam. The width of the second portion is wider than the width of the first portion. The first part and the second part support the floorboard, The vibration-damping material comprises a linear first vibration-damping section continuous in the longitudinal direction of the beam, It includes a plurality of second vibration-damping sections formed integrally with the first vibration-damping section and arranged at predetermined intervals in the longitudinal direction of the beam, The width of the first portion is the width of the first vibration-damping section. The width of the second portion is the sum of the width of the first vibration-damping section and the width of the second vibration-damping section. Between a plurality of adjacent second vibration-damping sections in the longitudinal direction of the beam, a buffer material is placed. A building floor structure characterized in that the spring constant of the cushioning material is lower than the spring constant of the vibration-damping material.

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