Bed vibration damping structure

Abstract

To provide a floor vibration damping structure effectively preventing vibration of a floor par an upper floor side and a lower floor side as reducing cost.SOLUTION: A floor vibration structure comprises a floor frame structure 10 configured to arrange a first beam 21 installed and rigidly connected between a pair of girders 11 and a second beam 22 installed between the first beam 21 and a pair of one 12a of the second girders 12 and connected with a pin at least one of floor parts F of an upper floor side and a lower floor side in the frame structure 10 surrounded with the pair of first girders 11 and the pair of second girders 12, and for the floor frame structure 10 the first beam 21 is positioned at a position so as to overlap a vibration transferring member 30 in a plan view.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a floor vibration control structure that suppresses vibration of a floor by interposing a vibration transmission member extending in the vertical direction between an upper floor side floor portion and a lower floor side floor portion.

Background Art

[0002] Patent Document 1 discloses a floor vibration control structure that suppresses vibration of a floor by interposing a vibration transmission member (column 8) extending in the vertical direction between each of the upper floor side and lower floor side floor portions (slab 4). In such a floor vibration control structure, the upper floor side floor portion and the lower floor side floor portion vibrate integrally when vertical vibration on one side (which may be simply referred to as "vibration" in the present application) is transmitted to the other side through the vibration transmission member. Therefore, the vibration can be reduced by increasing the effective mass. Furthermore, in order to effectively suppress the vibration of the floor portion without increasing the rigidity of the floor portion, the floor vibration control structure described in Patent Document 1 is configured such that a damper member made of a viscoelastic body is installed inside the vibration transmission member (column 8) to absorb a part of the vibration of the floor portion by the damper member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the floor vibration control structure described in Patent Document 1, in order to effectively suppress the vibration of the floor portion, it is necessary to install a relatively expensive damper member inside the vibration transmission member. Further, if the rigidity of the floor portion is increased, a vibration transmission member omitting such a damper member can be adopted, but the cost for increasing the rigidity of the entire floor portion increases, and as a result, it is difficult to solve the problem in terms of cost. In view of this actual situation, the main problem of the present invention is to provide a floor vibration control structure that suppresses the vibration of the floor by interposing a vibration transmission member extending in the vertical direction between the upper floor and the lower floor, and to provide a technology that can effectively suppress the vibration of the floor while reducing costs.

Means for Solving the Problems

[0005] The first characteristic configuration of the present invention is a floor vibration control structure that suppresses the vibration of the floor by interposing a vibration transmission member extending in the vertical direction between the upper floor and the lower floor, wherein at least one of the upper floor and the lower floor has a floor structure surrounded by a pair of first large beams extending in a first horizontal direction and a pair of second large beams extending in a second horizontal direction intersecting the first horizontal direction, and in the plane formed thereby, a first small beam installed between the pair of first large beams and rigidly joined to the pair of first large beams, and a second small beam installed between the first small beam and one side of the pair of second large beams and pin-joined to the first small beam and one side of the second large beam are arranged. In this floor structure, the first small beam is arranged at a position overlapping the vibration transmission member in plan view.

[0006] According to this configuration, when the upper floor and the lower floor transmit the vertical vibration on one side (which may be simply referred to as "vibration" in this application) to the other side through the vibration transmission member interposed therebetween, the upper and lower portions of the vibration transmission member will vibrate integrally. Therefore, by increasing the effective mass in the vibration, the vibration of the upper floor and the lower floor can be reduced. And in the floor structure of at least one of the upper floor portion and the lower floor portion, within the plane surrounded by a pair of first girders and a pair of second girders that intersect at a substantially right angle thereto, a first secondary girder installed between the pair of first girders is rigidly joined to the pair of first girders, and is supported by a relatively short second secondary girder installed between the first secondary girder and one side of the pair of second girders and pin-joined to both. Therefore, it is possible to increase the rigidity of the first secondary girder without increasing the beam cross-section, and suppress the vibration of the floor portion having the floor structure provided with the first secondary girder. Furthermore, by adopting a configuration that does not increase the cost, such as arranging the highly rigid first secondary girder disposed in the floor structure at a position overlapping the vibration transmission member in plan view directly below or directly above the vibration transmission member, when the floor portion having the floor structure vibrates integrally with the upper floor portion or the lower floor portion due to the intervention of the vibration transmission member, the rigidity of the first secondary girder can be directly applied to the vibration, and the vibration can be further suppressed. Therefore, according to the present invention, in a floor vibration damping structure in which a vibration transmission member extending in the vertical direction is interposed between the upper floor portion and the lower floor portion to suppress the vibration of the floor portion, it is possible to provide a technique capable of effectively suppressing the vibration of the floor portion while reducing the cost.

[0007] A second characteristic configuration of the present invention is that partition walls as the vibration transmission members are provided on each of the upper floor portion and the lower floor portion, and the partition wall provided on the upper floor portion and the partition wall provided on the lower floor portion are arranged at different positions in plan view.

[0008] According to this configuration, as the vibration transmission member for transmitting vibration between the upper floor and the lower floor, a partition wall provided for partitioning the indoor space between the upper floor and the lower floor can be used. And when the partition wall is used as the vibration transmission member in this way, by arranging the partition wall provided on the upper floor and the partition wall provided on the lower floor at different positions in plan view, the upper floor and the lower floor are vibrated in different inherent vibration modes, and the vibration of the upper floor and the lower floor can be more effectively suppressed by the interference effect of these inherent vibration modes.

[0009] The third characteristic configuration of the present invention is that column members as the vibration transmission members are provided on the upper floor and the lower floor respectively, and the column member provided on the upper floor and the column member provided on the lower floor are arranged at different positions in plan view.

[0010] According to this configuration, as the vibration transmission member for transmitting vibration between the upper floor and the lower floor, column members provided for supporting, for example, a partition wall between the upper floor and the lower floor can be used. And when the column members are used as the vibration transmission members in this way, by arranging the column member provided on the upper floor and the column member provided on the lower floor at different positions in plan view, the upper floor and the lower floor are vibrated in different inherent vibration modes, and the vibration of the upper floor and the lower floor can be more effectively suppressed by the interference effect of these inherent vibration modes.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Embodiment for Carrying out the Invention

[0012] An embodiment of the floor vibration control structure according to the present invention will be described with reference to the drawings. In the present embodiment, as shown in FIGS. 2 and 3, in a building having three or more floors including a first floor portion A1, a second floor portion A2, and a third floor portion A3, the floor vibration control structure of the present embodiment (hereinafter referred to as "this floor vibration control structure") is adopted. And this floor vibration control structure is configured to suppress the vibration of the floor portion F by interposing a vibration transmission member 30 extending in the vertical direction between the upper floor side floor portion F and the lower floor side floor portion F.

[0013] As the vibration transmission member 30, for example, a partition wall 31 (see FIGS. 2 and 3) provided to partition the indoor space S between the upper floor side floor portions F2 and F3 and the lower floor side floor portions F1 and F2 into a living room S1 and a corridor S2, or a column 32 (see FIG. 3) arranged on both sides with a door 33 provided on the partition wall 31 in between, are arranged on the upper floor side floor portions F2 and F3 and the lower floor side floor portions F1 and F2, and members extending in the vertical direction across these floor portions F1, F2, and F3 are used.

[0014] In this floor vibration control structure with the first floor portion A1 as a reference, between the second floor portion F2 of the second floor portion A2 on the upper floor side and the first floor portion F1 of the first floor portion A1 on the lower floor side, in a state where vertical vibration can be transmitted therebetween, vibration transmission members 30 such as the partition wall 31 and the column 32 are interposed. By this, the second floor portion F2 and the first floor portion F1 vibrate integrally at the upper and lower portions of the vibration transmission member 30 respectively when the vertical vibration on one side is transmitted to the other side through the vibration transmission member 30. Therefore, the vibration of the floor portions F2 and F1 is suppressed by the increase in the effective mass. In addition, in the present floor vibration control structure with the second floor portion A2 as a reference, vibration transmission members 30 such as partition walls 31 and intermediate columns 32 are interposed between the third floor portion F3 of the upper floor side third floor portion A3 and the second floor portion F2 of the lower floor side second floor portion A2 in a state where vertical vibration can be transmitted to them. By this, since the vertical vibration on one side of the third floor portion F3 and the second floor portion F2 is transmitted to the other side through the vibration transmission member 30, they vibrate integrally at the upper and lower portions of the vibration transmission member 30 respectively, so the vibration of the floor portions F3 and F2 is suppressed by the increase in the effective mass.

[0015] In a building adopting the present floor vibration control structure, as shown in FIG. 1, the floor portion F of each floor has a floor structure 10 in which a pair of steel girder first main girders 11 extending in the first horizontal direction X and a pair of steel girder second main girders 12 extending in the second horizontal direction Y intersecting substantially at right angles to the first horizontal direction X intersect at the column connection portion of the columns 15. And floor slabs 5 of each floor are constructed on this floor structure 10. And the present floor vibration control structure has features for effectively suppressing the vibration of the floor portion F while aiming for cost reduction, and the details thereof will be described below.

[0016] As shown in FIG. 1, in the present floor vibration control structure, a steel girder first secondary girder 21 and a steel girder second secondary girder 22 are arranged within the structural surface 10a of the floor structure 10. The first secondary girder 21 is installed between the pair of first main girders 11 and is rigidly joined to the pair of first main girders 11 by welding etc. at the end 21a. On the other hand, the second secondary girder 22 is installed between the first secondary girder 21 and one side 12a of the pair of second main girders 12 and is pin - joined to the first secondary girder 21 and one side 12a of the second main girder 12 by a gusset plate and bolts etc. at the end 22a. And by arranging the first secondary beam 21 and the second secondary beam 22 within the section 10a of the floor frame 10 in this way, the first secondary beam 21 installed between the pair of first main beams 11 is rigidly joined to the pair of first main beams 11, and then is supported by the relatively short second secondary beam 22 installed between the first secondary beam 21 and one side 12a of the pair of second main beams 12 and pin-joined to both of them. Therefore, the rigidity of the first secondary beam 21 is increased without an increase in the beam cross-section, and the vibration of the floor part F having the floor frame 10 provided with the first secondary beam 21 is suppressed. In addition, in the present embodiment, two second secondary beams 22 are arranged side by side between the first secondary beam 21 in one section 10a and one side 12a of the pair of second main beams 12. However, the number of the second secondary beams 22 arranged side by side can be appropriately changed.

[0017] Furthermore, in the floor frame 10 in which the first secondary beam 21 and the second secondary beam 22 are arranged as described above, as shown in FIGS. 1 to 3, the first secondary beam 21 with increased rigidity is arranged at a position overlapping the vibration transmission member 30 in plan view. Specifically, vibration transmission members 30 such as the partition wall 31 partitioning the living room S1 and the corridor S2 and the column 32 of the door 33 provided on the partition wall 31 are arranged directly below the first secondary beam 21 in the floor frame 10 of each floor's floor part F. Then, the portion directly above the vibration transmission member 30 in the floor part F having the floor frame 10 where the first secondary beam 21 is arranged vibrates integrally with the portion directly below the vibration transmission member 30 in the floor part F on the lower floor side due to the intervention of the vibration transmission member 30 directly below the first secondary beam 21. And the rigidity of the first secondary beam 21 directly acts on the vibration, and the vibration of the floor part F is further suppressed. Also, as shown in FIG. 1, since the first secondary beam 21 is installed between the pair of first main beams 11, the first secondary beams 21 can be linearly arranged in the adjacent sections 10a across the first main beam 11. Therefore, the partition wall 31 for partitioning the corridor S2 provided over a range of a plurality of sections 10a arranged side by side across the first main beam 11 and the adjacent living room S1 can be preferably arranged directly below the first secondary beams 21 linearly arranged in those plurality of sections 10a.

[0018] In this floor vibration damping structure, in order to more effectively suppress the vibration of the floor portion F, as shown in FIGS. 2 and 3, the partition wall 31 and the intermediate column 32 provided on the second floor portion F2 of the second floor portion A2 on the upper floor side with reference to the first floor portion A1, and the partition wall 31 and the intermediate column 32 provided on the first floor portion F1 of the first floor portion A1 on the lower floor side thereof are arranged at different positions from each other in plan view. For example, as shown in FIG. 2, in a view in the second horizontal direction Y parallel to the extending direction of the second main beam 12, the first secondary beam 21 in the floor frame 10 of the third floor portion F3 and the first secondary beam 21 in the floor frame 10 of the second floor portion F2 are arranged at different positions from each other in the first horizontal direction X (the left - right direction in FIG. 2). The partition wall 31 on the second floor portion F2 disposed immediately below the first secondary beam 21 in the floor frame 10 of the third floor portion F3 is connected, and the partition wall 31 on the first floor portion F1 disposed immediately below the first secondary beam 21 in the floor frame 10 of the second floor portion F3 is connected. Also, as shown in FIG. 3, in a view in the first horizontal direction X parallel to the extending direction of the first main beam 11, for each of the partition wall 31 on the second floor portion F2 disposed immediately below the first secondary beam 21 in the floor frame 10 of the third floor portion F3 and the partition wall 31 on the first floor portion F1 disposed immediately below the first secondary beam 21 in the floor frame 10 of the second floor portion F2, the door 33 and the intermediate columns 32 located on both sides thereof are arranged at different positions from each other in the first horizontal direction X. With such a configuration, each of the floor portions F on the upper floor side and the lower floor side vibrates in different inherent vibration modes, and due to the interference effect of these inherent vibration modes, the vibration of the floor portions F on the upper floor side and the lower floor side is more effectively suppressed.

[0019] 〔Alternative Embodiment〕 Another embodiment of the present invention will be described. Note that the configurations of each of the embodiments described below are not limited to being applied alone, and can also be applied in combination with the configurations of other embodiments.

[0020] (1) In the above-described embodiment, the vibration transmission members 30 such as the partition wall 31 and the intermediate column 32 are arranged and connected directly below the first secondary beam 21 in the floor structure 10, but they may be arranged and connected directly above the first secondary beam 21 instead.

[0021] (2) In the above-described embodiment, both the partition wall 31 and the intermediate column 32 are arranged at different positions in plan view on the upper floor side and the lower floor side. However, for example, the partition wall 31 may be arranged at the same position in plan view on the upper floor side and the lower floor side, and only the intermediate column 32 provided on the partition wall 31 may be arranged at different positions in plan view on the upper floor side and the lower floor side.

[0022] (3) In the above-described embodiment, both the partition wall 31 and the intermediate column 32 are used as the vibration transmission members 30, but either one or another member can also be used as the vibration transmission member.

[0023] (4) In the above-described embodiment, the present floor vibration control structure is applied to the first floor portion A1, the second floor portion A2, and the third floor portion A3. However, the application location of the present floor vibration control structure can be set as appropriate. For example, it can be applied to the entire building or concentratedly applied to a part of the building.

Explanation of Reference Numerals

[0024] 10 Floor structure 10a In-plane 11 First main beam 12 Second main beam 12a One side of the second main beam 21 First secondary beam 22 Second secondary beam 30 Vibration transmission member 31 Partition wall (vibration transmission member) 32 Intermediate column (vibration transmission member) F Floor part F1 Floor part F2 Floor part F3 Floor part X First horizontal direction Y Second horizontal direction

Claims

1. A floor vibration damping structure that suppresses vibration of the floor by interposing a vibration transmission member extending in the vertical direction between the upper floor side floor and the lower floor side floor, wherein at least one of the upper floor side floor and the lower floor side floor has a floor structure surrounded by a pair of first girders extending in a first horizontal direction and a pair of second girders extending in a second horizontal direction intersecting the first horizontal direction, and in the plane formed thereby, a first secondary beam installed between the pair of first girders and rigidly joined to the pair of first girders, and a second secondary beam installed between the first secondary beam and one side of the pair of second girders and pin-joined to the first secondary beam and one side of the second girders are arranged; and in this floor structure, the first secondary beam is arranged at a position overlapping the vibration transmission member in plan view.

2. Partition walls serving as the vibration transmission members are provided on the upper floor side floor and the lower floor side floor respectively, The floor vibration damping structure according to claim 1, wherein the partition wall provided on the upper floor side floor and the partition wall provided on the lower floor side floor are arranged at different positions in plan view.

3. Intermediate columns serving as the vibration transmission members are provided on the upper floor side floor and the lower floor side floor respectively, The floor vibration damping structure according to claim 1 or 2, wherein the intermediate column provided on the upper floor side floor and the intermediate column provided on the lower floor side floor are arranged at different positions in plan view.

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