JP5447974B2 - Damping floor beam - Google Patents

Description

  The present invention relates to a vibration-damping floor beam that supports a floor of a building and suppresses vibration of the floor.

In general, in a floor structure of a building, for example, a floor beam that supports the floor undergoes bending deformation due to an impact on the floor when a person walks, and vibration that repeats deformation occurs. As a result, the floor supported by the floor beam vibrates, giving unpleasant feeling to people walking on the floor and those around them.
Conventionally, in order to solve such problems, a horizontal cross-section member having a large bending rigidity and a large bending rigidity has been used as a floor beam.

However, when the cross section of the floor beam is made large, there is a problem that the weight of the floor beam is increased and the cost is increased, which is not economical.
Then, the method of relieving the vibration of a floor is proposed by connecting the floor structure which consists of a floor and the structure which supports this floor to nonstructural bodies, such as a partition wall, via a liquid seal damper (for example, Patent Document 1).

Also, on the both sides of the floor beam that supports the floor, two straight members that are inclined upward from the bottom to the center of both ends of the floor beam are arranged, and the lower end side of the straight member that is arranged obliquely is the building side And the upper end side of the straight member is connected to the floor beam via a vibration damping device (see, for example, Patent Document 2).
The vibration damping device includes a viscoelastic member that deforms when a relative displacement occurs between the floor beam and the straight member, and vibration energy is generated by the viscoelastic member that deforms when the floor beam vibrates. Absorbs and attenuates floor vibrations early.

  However, in the structures shown in these Patent Documents 1 and 2, a damping member is provided between the floor beam that is bent and deformed by a person's walking or the like, and a fixed point that is not displaced other than the floor beam. Need to be placed. Therefore, a space for a member that suppresses vibration of the floor beam is required in a portion other than the floor beam, and the space efficiency is poor. Further, in the construction, it is necessary to perform a work of arranging a vibration damping member between the floor beam and the fixed point, in addition to the construction of the floor beam, and the work at the site increases.

  Therefore, a vibration suppressing structure for a floor beam in which a steel material is joined along a longitudinal direction to a lower flange of a floor beam made of channel steel supporting a floor covering material via a vibration absorbing material has been proposed (for example, And Patent Document 3).

  According to this structure, the member for suppressing the vibration is joined only to the floor beam and is not connected to any member other than the floor beam. If a material and a steel material are attached, it can be constructed in the same manner as a floor beam not having a structure for suppressing vibration. Therefore, the floor beam can be easily constructed. Further, since the vibration absorbing material and the vibration suppressing member are joined only to the floor beam, the space efficiency is also excellent.

JP-A-10-169067 JP 2002-70228 A JP 2002-115364 A

  By the way, in the floor structure of patent document 3, the viscoelastic tape as a vibration absorber is provided on the lower surface of the lower flange of the floor beam made of channel steel over the entire length of the vibration suppressing member made of channel steel. Since they are bonded together via (double-sided adhesive tape), there is a possibility that the vibration of the floor beam cannot be sufficiently absorbed.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vibration-damping floor beam that is excellent in space efficiency, easy on-site construction, and excellent in performance to attenuate floor vibration.

In order to solve the above-mentioned problem, the vibration-damping floor beam according to claim 1, a floor beam body that supports a floor material,
A vibration suppressing member provided along the longitudinal direction of the floor beam body,
The vibration suppressing member is fixed only to the center portion of the floor beam body,
A damping material is provided between at least one end of the vibration suppressing member and the floor beam main body .

In the first aspect of the invention, since both ends of the floor beam main body are fixed, when the floor beam is bent and deformed due to an impact during walking of a person, the amount of displacement at the end of the floor beam main body is reduced. On the other hand, the amount of displacement at the center increases.
Therefore, when the floor beam body is bent and deformed, the vibration suppression member fixed only to the center part of the floor beam body is displaced by a displacement larger than the end part of the floor beam body together with the center part of the floor beam body. It will be.

As a result, a difference in displacement occurs between the vibration suppressing member and the end of the floor beam main body when the floor beam main body is bent. A damping material is provided between the vibration suppression member that produces a difference in displacement during bending deformation of the floor beam body and the end of the floor beam body. It is possible to quickly attenuate the vibration and suppress the vibration.
From the above, it is possible to suppress floor vibration without using a floor beam having a large cross section and a large weight.

In addition, the vibration suppressing member, the damping material, and the floor beam used for the damping floor beam are joined to each other, but the vibration suppressing member and the damping material are not joined to any member other than the damping floor beam. If vibration suppression members and damping materials are attached to the floor beam body, the vibration-damping floor beam can be constructed in the same manner as a general floor beam in the field work at the time of construction. .
Moreover, since the vibration suppressing member and the damping material are not joined to members other than the damping floor beam as described above, the space efficiency of the damping floor beam can be improved.

The vibration-damping floor beam according to claim 2 is a floor beam body that supports a floor material;
A vibration suppressing member provided along the longitudinal direction of the floor beam body,
The vibration suppression member is fixed only to both ends of the portion where the floor beam main body and the vibration suppression member overlap ,
A damping material is provided between the vibration suppressing member and a central portion of the floor beam main body.

In the invention according to claim 2, since both ends of the floor beam main body are fixed as described above, the displacement at the end of the floor beam main body is caused when bending deformation is caused by an impact during walking of a person. The amount of displacement at the center is larger than the amount.
Therefore, the vibration suppression member fixed only to the both ends of the portion where the floor beam main body and the vibration suppression member overlap is the center part of the floor beam main body together with the both ends of the floor beam main body when the floor beam main body is bent and deformed. It will be displaced with a smaller amount of displacement.

Thereby, a difference arises in a displacement amount between a vibration suppression member and the center part of a floor beam main body at the time of bending deformation of a floor beam main body. A damping material is provided between the vibration suppression member that produces a difference in displacement during bending deformation of the floor beam body and the center part of the floor beam body. It is possible to quickly attenuate the vibration and suppress the vibration.
From the above, it is possible to suppress floor vibration without using a floor beam having a large cross section and a large weight.

In addition, the vibration suppressing member, the damping material, and the floor beam used for the damping floor beam are joined to each other, but the vibration suppressing member and the damping material are not joined to any member other than the damping floor beam. If vibration suppression members and damping materials are attached to the floor beam body, the vibration-damping floor beam can be constructed in the same manner as a general floor beam in the field work at the time of construction. .
Moreover, since the vibration suppressing member and the damping material are not joined to members other than the damping floor beam as described above, the space efficiency of the damping floor beam can be improved.

The vibration-damping floor beam according to claim 3 is the invention according to claim 1 or claim 2,
The floor beam body is made of a steel material having upper and lower flanges and a web connecting these flanges, and the vibration suppressing member is fixed to any one of the upper flange, the lower flange, and the web. And

In the invention according to claim 3, the vibration suppressing member is fixed to any one of the upper flange, the lower flange and the web of the floor beam main body. It is possible to easily dispose the damping material between the suppression member and the damping material to be easily disposed between the vibration suppressing member and the web.
Note that the steel material is, for example, an H-shaped steel or a grooved steel.

The vibration-damping floor beam according to claim 4 is the invention according to any one of claims 1 to 3,
The damping material is provided in the vertical space between the floor beam main body and the vibration suppressing member.

  In the invention according to claim 4, since the damping material is provided in the vertical space between the floor beam main body and the vibration suppressing member, the vibration in the vertical direction of the floor beam main body can be efficiently damped. Can do.

The vibration-damping floor beam according to claim 5 is the invention according to any one of claims 1 to 3,
The damping material is provided in both the vertical distance between the floor beam main body and the vibration suppressing member and the substantially horizontal distance substantially orthogonal to the axial direction of the floor beam main body. .

  In the fifth aspect of the present invention, both the vertical distance between the floor beam main body and the vibration suppressing member and the distance substantially perpendicular to the axial direction of the floor beam main body and along the horizontal direction are attenuated. Since the material is provided, both the vertical vibration and the horizontal vibration of the floor beam main body can be efficiently damped.

  According to the vibration-damping control floor structure of the present invention, the floor vibration body is efficiently vibrated by utilizing the difference in displacement between the center portion and the end portion of the floor beam body when the floor beam body is bent and deformed. Can be suppressed. In addition, it is possible to improve the space efficiency by reducing the structure of the vibration-damping floor beam without the need for joining with members other than the vibration-damping floor beam. Moreover, since joining with members other than a damping floor beam is not required, construction of a damping floor beam can be made easy.

It is a side view which shows the damping floor beam which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the said damping floor beam. It is a figure for demonstrating the damping action in the said damping floor beam. It is a figure for demonstrating the damping action in the said damping floor beam. It is a figure for demonstrating the vibration of the horizontal direction of a floor beam. It is sectional drawing which shows the modification of the damping floor beam of 1st Embodiment. It is a figure for demonstrating another modification of the damping floor beam of 1st Embodiment. It is a figure for demonstrating another modification of the damping floor beam of 1st Embodiment. It is a figure which shows the damping floor beam concerning 2nd Embodiment of this invention, Comprising: (a) is a side view, (b) is sectional drawing. It is a figure which shows the damping floor beam concerning 3rd Embodiment of this invention, Comprising: (a) is a side view, (b) is sectional drawing. It is a figure which shows the damping floor beam concerning 4th Embodiment of this invention, Comprising: (a) is a side view, (b) is sectional drawing. It is a figure which shows the damping floor beam concerning 4th Embodiment of this invention, Comprising: (a) is a side view, (b), (c) is sectional drawing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the vibration-damping floor beam of the first embodiment includes a floor beam body 1 that supports a floor material (not shown), and vibration suppression that is provided along the longitudinal direction of the floor beam body 1. A member 3 and a damping material 5 provided between the floor beam main body 1 and the vibration suppressing member 3 are provided.

  The floor beam main body 1 is made of an H-shaped steel provided with an upper flange 11, a lower flange 12, and a web 13 connecting them. The both ends of the floor beam main body 1 are fixed to a structure such as a torso 14, a column, other beams, and a structural wall. A plurality of floor beam main bodies 1 are arranged in parallel to each other, and a flooring material is spread and supported thereon.

  The vibration suppression member 3 is made of channel steel provided with an upper flange 31, a lower flange 32, and a web 33 connecting them. The vibration suppression member 3 has a vertical width that is narrower than the vertical width of the floor beam main body 1, for example, from about half the floor beam main body 1 to a vertical width that is less than that. The left and right width of the vibration suppressing member 3 is narrower than the left and right width of the floor beam main body 1, for example, the left and right width of half or less of the floor beam main body 1.

  The vibration suppressing members 3 are respectively arranged on the left and right of the web 1 of the floor beam main body 1 made of H-shaped steel. That is, a pair of left and right vibration suppressing members 3 are arranged with respect to the floor beam main body 1. The left and right vibration suppressing members 3 made of grooved steel are arranged so that the groove side (opening side) faces the opposite side of the web 1. The vibration suppressing member 3 is disposed between the upper and lower flanges 11 and 12 of the floor beam main body 1 and is disposed so that the entire vibration suppressing member 3 overlaps the upper and lower flanges 11. That is, the vibration suppressing member 3 is disposed so as not to protrude from the left and right from the flanges 11 and 12.

The vibration suppressing member 3 is disposed between the upper and lower flanges 11 and 12 so as not to contact the flanges 11 and 12 and is disposed below the center of the height of the floor beam main body 1. The vibration suppressing member 3 and the floor beam main body 1 are arranged so that their axial directions are parallel to each other.
The left and right end portions of the vibration suppressing member 3 and the left and right end portions of the floor beam main body 1 are fixed via support rods 7 respectively.

  A pair of support rods 7 for fixing the left and right end portions of the vibration suppressing member 3 and the left and right end portions of the floor beam main body 1 have their upper ends fixed to the upper flange 11 of the floor beam main body 1, The lower end is fixed to the upper flange 31 of the vibration suppressing member 3.

The damping material 5 is a known viscoelastic damping material made of, for example, a viscoelastic material, and is formed in a plate shape in this example. The damping material 5 is not limited to the viscoelastic damping material described above as long as it can absorb and attenuate vibration energy, and various viscoelastic materials, various dampers, and the like can be used.
The damping member 5 includes an upper surface of the lower flange 12 of the floor beam main body 1 and a lower surface of the lower flange 32 of the vibration suppressing member 3 disposed on the upper side of the floor beam main body 1 at the center portion in the axial direction of the floor beam main body 1. It is arranged between. The upper and lower surfaces of the plate-like damping material 5 may be bonded to the lower flange 32 of the vibration suppressing member 3 and the lower flange 12 of the floor beam main body 1, respectively.

  In this vibration-damping floor beam, as shown in FIG. 3 and FIG. 4, the floor beam main body 1 whose left and right end portions are fixed to the structure 14 by the impact of a person walking on the floor or the like is provided. It will be bent and deformed so as to project downward into an arcuate shape. At this time, since the left and right end portions of the floor beam main body 1 are fixed to the structure 14, the center portion is displaced most greatly, and the displacement becomes smaller toward the left and right ends from the center portion. FIG. 4 shows a case where the floor beam body 1 is bent and deformed in the vertical direction.

  Since the left and right ends of the vibration suppressing member 3 are respectively fixed to the left and right ends of the floor beam main body 1 via the support rods 7, the vertical displacement with respect to the center portion of the floor beam main body 1 as described above. Is displaced up and down in the same manner as the vertical displacement of the left and right ends of the floor beam main body 1 with a small. At this time, since the load from the floor does not act on the vibration suppressing member 3, the whole is similarly displaced up and down, and is fixed to the center portion and the left and right end portions of the floor beam body 1. There is almost no difference in the amount of displacement between the ends.

  On the other hand, in the floor beam main body 1, as described above, the central portion has a larger amount of displacement than the end portion. The displacement amount (δ1) is larger. Therefore, when the floor beam main body 1 vibrates up and down based on the bending deformation described above, a displacement difference is generated between the central portion of the floor beam main body 1 and the central portion of the vibration suppressing member 3. . Therefore, by interposing the damping material 5 between the central portion of the floor beam main body 1 and the central portion of the vibration suppressing member 3, the damping material 5 absorbs vibration energy based on the above-described displacement difference. Thus, the vibration of the floor beam main body 1 can be quickly damped. Thereby, it becomes possible to suppress vibration of the floor such as when a person turns on the floor.

  Further, the vibration suppressing member 3, the damping material 5 and the support bar 7 which constitute the vibration-damping floor beam together with the floor beam main body 1 are bonded to members in the vibration-damping floor beam and bonded to portions other than the vibration-damping floor beam. For example, between the upper and lower flanges 11 and 12 of the floor beam body 1 as described above, the vibration suppressing member 3, the damping material 5, and the support rod 7 are arranged in a range overlapping with the flanges 11 and 12. be able to.

Therefore, the entire damping floor beam is within the range occupied by the floor beam main body 1, and the damping floor beam can be made compact and space efficiency can be improved.
Moreover, before attaching the floor beam main body 1 to the structure 14, the vibration suppressing member 3, the damping material 5 and the support rod 7 are attached to the floor beam main body 1, and the construction can be performed in the state of the vibration-damping floor beam. The site work at the time of construction of the vibration control floor beam can be made efficient.

  In the above description, the vertical vibration of the floor beam main body 1 has been described. However, as shown in FIG. 5, the floor beam main body 1 has a horizontal direction (substantially orthogonal to the floor beam main body 1 and substantially horizontal). Direction). In this case, as described above, the floor beam main body 1 is connected to the structure 14 at both the left and right ends, and the floor material is fixed to the upper side. The lower flange 12 and the lower flange of the web 13 vibrate left and right, that is, the lower end of the web 13 and the lower flange rotate and oscillate around the upper end of the web 13. In addition, the center part is more displaced from the left and right ends of the floor beam main body 1 to the left and right at the lower part of the floor beam main body 1.

  Therefore, as shown in the modified example of the vibration-damping floor beam in FIG. 6, the damping member 9 is also provided between the left and right directions of the floor beam main body 1 and the vibration suppressing member 3 (horizontal direction orthogonal to the axial direction of the floor beam main body). It is good also as what interposes. Thereby, the vibration in the left-right direction of the floor beam main body 1 is also attenuated and suppressed, and the vibration of the floor due to walking or the like is suppressed.

  The vibration suppression member 3 has its left and right ends fixed to the left and right ends of the floor beam main body 1 whose vibration displacement is smaller than the central portion. In addition, this fixing is performed by connecting the vibration suppressing member 3 to the upper flange 11 having a lateral vibration displacement smaller than the lower flange 12 via the support rod 7. Further, the vibration suppressing member 3 is disposed on the lower half side of the upper and lower range of the floor beam main body 1, and the height position of the vibration suppressing member 3 is such that the lateral vibration displacement of the floor beam main body 1 is the upper part. Corresponds to the larger bottom.

  From the above, the displacement amount of the vibration suppression member 3 to the left and right is smaller than the lower part of the center portion of the floor beam body 1, and the center portion of the vibration suppression member 3 is the most displacement amount in the floor beam body 1. Is disposed opposite to the lower part of the central portion of the floor beam main body 1 as a range including a portion where the amount of the beam increases or the vicinity thereof. Thus, the damping material 9 is interposed between the central portion of the vibration suppressing member 3 and the lower portion of the central portion of the floor beam main body 1 that face each other. The displacement difference with the member 3 is large. Thereby, the vibration in the lateral direction of the floor beam main body 1 is efficiently damped by the damping material 9.

  Although the vibration suppressing member 3 is a grooved steel, the vibration suppressing member 3 is not limited to the grooved steel. As shown in FIG. 7, the floor suppressing beam 3 extends along the longitudinal direction of the floor beam main body 1. A long member disposed between the left and right end portions of the main body 1 can be used as the vibration suppressing member 10. As the vibration suppressing member 10, it is desirable that the bending rigidity is different from that of the floor beam body 1 and the bending rigidity is large to some extent.

Further, although the vibration suppressing member 3 is fixed to the upper flange 11 of the floor beam main body 1, it may be fixed to the web 13 of the floor beam main body 1 as shown in FIG. It is good also as what fixes to.
In FIG. 8, the web 33 of the vibration suppressing member 3 is fixed to the web 13 of the floor beam main body 1 by a support bar 71 disposed substantially horizontally and substantially orthogonal to the floor beam main body 1. In addition, the support bar 71 has fixed the pair of vibration suppression members 3 which penetrate the web 13 of the floor beam main body 1 and are arrange | positioned at the left and right of the web 13, for example. Instead of the support bar 71, a bolt that is screwed into a screw hole formed in the web 13 may be used. At this time, the vibration suppressing member 3 may be pin-supported by a bolt.
Further, in the first embodiment and the modification thereof, the vibration suppressing members 3 are provided on the left and right sides of the floor beam main body 1, respectively, but may be provided on only one of the left and right sides.

Next, a second embodiment of the present invention will be described.
As shown in FIG. 9, in the vibration-damping floor beam of the second embodiment, instead of the vibration suppressing member 3 of the first embodiment, the groove opening faces upward, and the groove has a wider left and right width than the floor beam body 1. A vibration suppressing member 35 made of a shape steel is used.
The floor beam body 1 is made of the same H-shaped steel as that of the first embodiment.
The vibration suppressing member 35 is a grooved steel as described above, and has a shape in which the left and right flanges 36 are connected by the lower web 37.

The vibration suppression member 35 is disposed along the longitudinal direction of the floor beam main body 1 in a state where the floor beam main body 1 enters the groove between the left and right flanges 36 of the vibration suppression member 35.
Both ends of the vibration suppressing member 35 are fixed to both ends of the floor beam main body 1. In the second embodiment, the left and right flanges 36 of the vibration suppressing member 35 are fixed to the web 13 of the floor beam main body 1. Further, the left and right flanges 36 and the web 13 are fixed substantially horizontally at a right angle to the web 13 and at both ends of the support rod 72 fixed to the web 13 while penetrating the web 13. 36 is fixed.

  The lower flange 12 of the floor beam main body 1 made of H-shaped steel and the web 37 of the vibration suppressing member 35 are arranged in a state of being close to each other and facing each other. The damping material 5 is provided between the lower flange 12 of the floor beam main body 1 and the web of the vibration suppressing member 35 at the axial central portion of the floor beam main body 1 and the axial central portion of the vibration suppressing member 35. Is arranged. The damping material 5 is the same as the damping material 5 of the first embodiment.

  In the vibration-damping floor beam of the second embodiment, the same effects as the vibration-damping floor beam of the first embodiment can be achieved. In the vibration-damping floor beam of the second embodiment, the left and right width of the vibration suppressing member 35 is wider than the left and right width of the floor beam main body 1, but in the groove of the vibration suppressing member 35 that is channel steel. Since the part (lower part) of the floor beam main body 1 is inserted into the floor, the vibration-damping floor beam is made compact. Thereby, even if the left-right width of the vibration suppressing member 35 is wider than the floor beam main body 1, the space efficiency can be improved.

Next, a third embodiment of the present invention will be described.
As shown in FIG. 10, the vibration-damping floor beam of the third embodiment is the same as that of the vibration-damping floor beam of the first embodiment, with both ends of the vibration suppressing member 3 fixed to both ends of the floor beam main body 1, respectively. While the damping member 5 is interposed between the central portion of the suppressing member 3 and the central portion of the floor beam main body 1, the central portion of the vibration suppressing member 3 is fixed to the central portion of the floor beam main body 1. The damping member 5 is interposed between both ends of the vibration suppressing member 3 and both ends of the floor beam main body 1.
In the third embodiment, the floor beam main body 1 and the vibration suppressing member 3 have substantially the same configuration as that of the first embodiment, and the floor beam main body 1 and the vibration suppressing member 3 are the same as those in the first embodiment. They are arranged in the same way. The damping material 5 is the same as that of the first embodiment.

  The floor beam main body 1 and the vibration suppressing member 3 are fixed by connecting the web 13 of the floor beam main body 1 and the web 33 of the vibration suppressing member 3 with a support rod 73. A space is provided between the web 13 and the web 33. Further, three support bars 73 are arranged side by side in the vertical direction. The support rod 73 is fixed to the web 13 in a state of penetrating the web 13 of the floor beam main body 1. Further, the left and right end portions of the support rod 73 are fixed to the web 33 in a state of penetrating the web 33 of the vibration suppressing material 3 disposed on the left and right, respectively.

As in the case of the first embodiment, the vibration suppressing member 3 is disposed between the upper and lower flanges 11 and 12 on the left and right sides of the web 13 of the floor beam body 1, and the entire vibration suppressing member 3 is vertically moved. The flanges 11 and 12 are arranged in a range overlapping with the upper and lower sides. Further, the vibration suppressing member 3 is disposed on the lower side of the floor beam body 1, that is, on the side closer to the lower flange 12 than the upper flange 11.
Between the left and right ends of the vibration suppressing member 3 and the left and right ends of the floor beam main body 1, the lower surface of the flange 32 below the vibration suppressing member 3 and the upper surface of the flange 12 below the floor beam main body 1, Attenuating material 5 is interposed between the two. The damping material 5 may be fixed to the flange 32 and the flange 12 by adhesion or the like, for example. Such a damping material 5 is disposed so as to be interposed between the vibration suppressing member 3 and the floor beam main body 1 in the vertical direction.

  In the vibration-damping floor beam of the third embodiment, when the floor beam body 1 is bent and deformed by a person walking on the floor or the like, the floor beam body 1 has the largest bending deformation displacement at the center of the floor beam body 1. Since the vibration suppression member 3 is fixed, the entire vibration suppression member 3 is displaced up and down more than the left and right ends of the floor beam main body 1 in the same manner as the central portion of the floor beam main body 1.

  Therefore, the left and right ends connected to the left and right ends of the floor beam body 1 via the damping member 5 of the vibration suppressing member 3 are displaced more greatly than the left and right ends of the floor beam body 1. As a result, a displacement difference is generated between the left and right ends of the vibration suppressing member 3 in which the damping material 5 is interposed and the left and right ends of the floor beam main body 1.

  Accordingly, when the floor beam main body 1 is bent and deformed due to an impact during walking or the like, the damping material is interposed in a portion where a large displacement difference is generated between the vibration suppressing member 3 and the floor beam main body 1. When 1 vibrates due to the impact, vibration energy can be absorbed and vibration can be attenuated. The first embodiment is opposite to the member largely displaced between the floor beam main body 1 and the vibration suppressing member 3 at the position where the damping material 5 is interposed, but the floor beam main body 1 is based on the same principle as the first embodiment. It becomes possible to quickly dampen the vibration.

Next, a fourth embodiment of the present invention will be described.
As shown in FIG. 11, the vibration-damping floor beam of the fourth embodiment is obtained by increasing the arrangement position of the damping material 5 with respect to the third embodiment.
In the third embodiment, the lower surface of the flange 32 under the vibration suppressing member 3 and the upper surface of the flange 12 under the floor beam main body 1 at both the left and right ends of the vibration suppressing member 3 and the left and right ends of the floor beam main body 1. On the other hand, in the fourth embodiment, the vibration suppression member 38 having a wider vertical width than that of the vibration suppression member 3 of the third embodiment is used. Not only between the lower surface of the flange 40 and the upper surface of the flange 12 below the floor beam body 1, but also the upper surface of the flange 39 on the vibration suppressing member 38 and the lower surface of the flange 11 on the floor beam body 1 Attenuating material 5 is also arranged between them.
In the vibration-damping floor beam of the fourth embodiment, as in the third embodiment, the center portion of the vibration suppressing member 38 is fixed by a plurality of support rods 73 arranged vertically in the center portion of the floor beam body 1. Has been.

Similarly to the third embodiment (first embodiment), the vibration suppressing member 38 is located between the upper and lower flanges 11 and 12 between the upper and lower flanges 11 and 12 on the left and right sides of the web 13 of the floor beam body 1. It is arranged to overlap.
The vertical width of the vibration suppressing member 38 is slightly narrower than the distance between the upper and lower flanges 11 and 12 of the floor beam main body 1. Accordingly, the lower flange 39 of the vibration suppressing member 38 and the lower flange 12 of the floor beam main body 1 are arranged close to each other, and the upper flange 39 of the vibration suppressing member 38 and the floor beam main body 1 are The upper flange 11 can be disposed close to the upper flange 11.

  In a state where the damping material 5 is disposed between the lower surface of the lower flange 40 of the vibration suppressing member 38 and the upper surface of the lower flange 12 of the floor beam body 1, the upper flange 39 of the vibration suppressing member 38 is arranged. The damping material 5 can be disposed between the upper surface and the lower surface of the upper flange 11 of the floor beam main body 1.

  In the vibration-damping floor beam of the fourth embodiment, the same operational effects as those of the vibration-damping floor beam of the third embodiment can be obtained. Further, in the third embodiment, the damping material 5 is disposed only between the lower flange 32 of the vibration suppressing member 3 and the lower flange 12 of the floor beam main body 1. The damping material 5 is also disposed between the upper flange 39 of the vibration suppressing member 38 and the upper flange 11 of the floor beam main body 1, so that the effect of dampening the vibration caused by the damping material 5 is the same as that of the third embodiment. It can be higher than the case.

Next, a fifth embodiment of the present invention will be described.
As shown in FIG. 12, the vibration-damping floor beam of the fifth embodiment is provided with vibration suppressing members 43 made of channel steel at the left and right side edges of the lower flange 12 of the floor beam body 1. is there.
The vibration suppressing member 43 is disposed along the longitudinal direction of the floor beam main body 1, and the groove of the vibration suppressing member 43, which is a grooved steel, faces the lateral direction. Further, the vibration suppressing member 43 includes an upper flange 44, a lower flange 45, and a web 46 that connects them.

Moreover, the vibration suppression member 43 is arrange | positioned at the right-and-left side edge part of the lower flange 12 of the floor beam main body 1, respectively, and these two vibration suppression members 43 mutually oppose the part used as the opening of a groove | channel. Has been placed. The side edge of the flange 12 on the lower side of the floor beam main body 1 is inserted into the groove of the vibration suppressing member 43 made of channel steel.
In other words, the side edge portion of the lower flange 12 of the floor beam main body 1 is inserted between the upper flange 44 and the lower flange 45 of the vibration suppressing member 43.

  Further, between the upper surface of the side edge portion of the lower flange 12 of the floor beam main body 1 and the lower surface of the upper flange 44 of the vibration suppressing member 43, the lower surface of the side edge portion of the flange 12, and the vibration suppressing member 43 A space is provided between the upper surface of the lower flange 45. Further, a gap is also provided between the side edge of the flange 12 and the web 46 of the vibration suppressing member 43.

In this state, both ends of the vibration suppressing member 43 are fixed to the both ends of the lower flange 12 of the floor beam main body 1 by the support members 75, and the vibration suppressing member 43 is integrated with the left and right end portions of the floor beam main body 1. Displaceable.
Further, a damping material 51 is disposed between the center portion of the floor beam main body 1 and the center portion of the vibration suppressing member 43. The damping material 51 is formed in a U-shaped cross section. The damping member 51 is formed on the upper surface of the side edge of the flange 12 on the lower side of the floor beam main body 1 and on the upper side of the vibration suppressing member 43 at the central portion of the floor beam main body 1 and the central portion of the vibration suppressing member 43. Between the lower surface of the flange 44, it arrange | positions so that the space between the lower surface of the side edge part of the flange 12 and the upper surface of the flange 45 below the vibration suppression member 43 may be filled. Further, the damping material 51 is disposed so as to fill a space between the side edge of the flange 12 and the web 46 of the vibration suppressing member 43.

  In this vibration-damping floor beam, as in the case of the first embodiment, the vibration suppressing member 43 having the left and right ends fixed to the left and right ends of the floor beam body 1 vibrates the floor beam body 1. In this case, the floor beam body 1 is displaced with a displacement amount smaller than the upper and lower displacement amounts of the central portion of the floor beam body 1. Therefore, a displacement difference is generated between the floor beam main body 1 and the vibration suppressing member 43 in the portion where the above-described damping material 51 is disposed, and this is attenuated by the damping material 51.

  Further, as described above, the floor beam body 1 is displaced in the horizontal direction by an impact such as walking, but the upper flange 11 of the floor beam body 1 is connected to the floor material (floor plywood or the like) to restrict the displacement. Therefore, the lower side and the lower flange 13 of the web 12 rotate in the left and right directions with the upper end of the web 12 as the center.

  Also in this rotational vibration, the displacement is larger in the central portion of the floor beam main body 51 than in the both ends of the floor beam main body 1 as in the case of the vertical vibration. Therefore, the amount of horizontal displacement of the vibration suppressing member 43 fixed to both ends of the floor beam main body 1 is smaller than the central portion of the floor beam main body 51 where the damping material 51 is provided, and the portion where the damping material 51 is disposed. Therefore, a displacement difference is generated between the vibration suppressing member 43 and the floor beam main body 51.

As described above, since the damping material 51 is also disposed between the side edge of the flange 12 and the web of the vibration suppressing material 43, the vibration in the horizontal direction perpendicular to the floor beam main body 1 can be attenuated. Therefore, the rotational vibration of the lower part of the floor beam main body 1 to the left and right is also attenuated.
Moreover, although the vibration suppression member 43 is attached to the left and right side edges of the flange 12, respectively, the vibration suppression member 43 is small, so that the weight of the floor beam portion is increased by attaching the vibration suppression member 43. Can be reduced.

1 Floor beam body 3, 10, 35, 38, 43 Vibration suppression member 5, 51, Damping material

Claims (5)

A floor beam body that supports the flooring;
A vibration suppressing member provided along the longitudinal direction of the floor beam body,
The vibration suppressing member is fixed only to the center portion of the floor beam body,
A damping floor beam, wherein a damping material is provided between at least one end of the vibration suppressing member and the floor beam main body . A floor beam body that supports the flooring;
A vibration suppressing member provided along the longitudinal direction of the floor beam body,
The vibration suppression member is fixed only to both ends of the portion where the floor beam main body and the vibration suppression member overlap ,
A damping floor beam, wherein a damping material is provided between the vibration suppressing member and a central portion of the floor beam main body.   The floor beam body is made of a steel material having upper and lower flanges and a web connecting these flanges, and the vibration suppressing member is fixed to any one of the upper flange, the lower flange, and the web. The vibration-damping floor beam according to claim 1 or 2.   The damping material according to any one of claims 1 to 3, wherein the damping material is provided in a vertical space between the floor beam main body and the vibration suppressing member. Tilar floor beam.   The damping material is provided in both the vertical distance between the floor beam main body and the vibration suppressing member and the substantially horizontal distance substantially orthogonal to the axial direction of the floor beam main body. The vibration-damping floor beam according to any one of claims 1 to 3.

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