JP4423401B2 - Vertical vibration damping device - Google Patents

Description

  The present invention relates to a vibration damping device that dampens a structure that vibrates up and down, and is particularly applied to a structure having a horizontal structure such as an elevated highway, a railway track, or a floor slab constituting a bridge. The present invention relates to a vertical vibration damping device that suppresses vertical vibrations of a horizontal structure.

  In recent years, in structures with horizontal structures such as elevated expressways, railway tracks, or floor slabs that form bridges, damage such as falling or breakage of floor slabs during traffic vibration or ground shaking, etc. Various measures have been taken to suppress this.

As one of the countermeasures, there is a structure damping device previously proposed by the applicant.
In this vibration damping device, a tension member having an overall length longer than the interval between the support portions is disposed between the support portions provided at a predetermined interval below the flat structure, In addition, the first link piece is rotatably connected, and the second link piece is rotatably connected to the horizontal structure, and the other end portion of the first link piece and the second link piece are connected. These first link pieces are connected between the structure constituting the structure and the connecting portion between the first link piece and the second link piece. An urging member that applies tension to the tension member by urging the second link piece, and a buffer member that is actuated by rotation of the first link piece and the second link piece are provided. Yes.

According to this vibration damping device, the vertical vibration of the horizontal structure can be efficiently and effectively suppressed, which is extremely suitable (see, for example, Patent Document 1).
PCT / JP02 / 13630 (page 14, FIG. 1)

By the way, this tension member described above is an important component when configuring the vibration damping device.
However, if the tension member is deformed in the vertical or horizontal out-of-plane direction or the axial direction, the vibration damping device vibrates with the floor slab, and therefore a predetermined vibration damping effect may not be obtained.

Since the tension member itself is composed of a steel bar or the like, there is almost no damping effect, and out-of-plane vibration occurs depending on the installation accuracy of the apparatus.
Further, as shown in FIG. 2, in a vibration damping device having a weight m1 (m1 / 2 + m1 / 2) having a vibration damping device in addition to the weight m2 of a structure such as a floor board, depending on the vibration frequency, m2 As described above, only m1 may vibrate.

  Therefore, the present invention provides a vibration damping device that amplifies the amount of displacement of the structure and absorbs vibration, thereby reducing the out-of-plane or axial deformation and reducing the vibration of the weight of the vibration damping device, thereby further improving the vibration damping effect. An object of the present invention is to provide a vertical vibration damping device capable of obtaining the above.

In order to solve the above-described problems, the vertical vibration damping device according to the present invention employs the following technical means.
That is, the vertical vibration damping device according to claim 1 includes a first configuration rod having a base pivotally attached to a structure supported by a support member, a configuration surface of the structure, and a first configuration tip portion. A link portion configured with a second configuration rod having a base portion pivotally attached to the first configuration rod tip portion so that the tip portion is positioned between the first configuration rib portion and the support member side. A base member of the structure body or the support member, a tension member erected between the front portion of the second component rod, the base part of the structure body or the support member on the support member side, and the first A buffer portion that is pivotally mounted so as to be swingable so as to be parallel to the tension member between the front portion of the two structural members and absorbs vibrations other than the constituent surfaces of the structure , Each of the two links is configured with a pair of two ridges arranged so as to face each other outward or inward. The buffer portions engaged with each other are communicated with each other through the tip portions of the second component rod, and the tension member pivotally attaches the tip portion of the second component rod. By connecting a second buffering portion that is stretched along the component surface so as to connect the tip portions and is expanded and contracted to absorb vibration between the tip portions of the first component rods, the vertical vibration is generated. It is characterized by controlling vibration.

  Since the buffer member that absorbs vibration by expanding and contracting between the component surface of the structure where the vertical vibration occurs or the support member that supports the structure and the tip of the second component cage, Even if there is a problem with the installation accuracy of the device, the vibration is absorbed at this part to suppress the occurrence of out-of-plane vibration, and the weight of the damping device is more than the floorboard weight depending on the vibration frequency. Even if the surroundings vibrate, the buffer portion efficiently absorbs the vibration, so that it is possible to provide a vertical vibration damping device that further improves the damping effect.

  Next, a vertical vibration damping device according to the present embodiment will be described with reference to the accompanying drawings. In the figure, reference numeral 1 denotes a vertical vibration damping device, and reference numeral W denotes a floor slab (structure).

As shown in FIG. 1, the vertical vibration damping device 1 according to the present embodiment includes a tension member 11, a link portion 12, a buffer portion 13, and a second buffer portion 14. It is provided on the bottom surface (configuration surface) of the floor slab W that is supported at both ends by the member W2.
The

  The tension member 11 is made of a rigid member such as a cable member or a steel rod, and the front part 12d of the second component rod 122 described later pivots along the bottom surface of the floor slab W that supports traffic load and the like. The floor slab W base adjacent to the support member W2 is pivoted through the landing portion and stretched along the bottom surface.

  The link portion 12 has a front portion 12d between the first configuration rod 121 having a base 12a pivotally attached to the bottom surface of the floor slab W where vertical vibrations occur, and the front portion 12b of the floor slab W and the first configuration rod 121. And a second component rod 122 having a base portion 12c pivotally attached to a tip portion 12b of the first component rod 121 so as to have a substantially letter shape.

  And this link part 12 is arrange | positioned in the approximate center part of the extending | stretching member 11 so that 2nd structure collars 122 may mutually face outside, and is comprised by a pair, and the front part of the 2nd structure collar 122 12d communicates with each other via the stretching member 11.

  The shock absorber 13 is an oil damper having a well-known structure. As described above, the shock absorber 13 is installed (oscillated) between the floor slab W and the front portion 12d of the second component rod 122 so as to be parallel to the tension member 11. It is pivotally possible). In addition, in FIG. 1, the buffer part 13 and the stretching member 11 are arranged in parallel in the drawing depth direction.

  The buffer portion 13 may be anything as long as it absorbs vibrations by expansion and contraction of an active damper having a variable orifice, a viscoelastic body, an elastic-plastic body, etc. in addition to the oil damper exemplified.

  The second buffer portion 14 is configured by an urging member 141 configured by a tension spring and a buffer member 142 configured by an oil damper, and each of the second buffer portions 14 is arranged in parallel between the front portions 12b of the first configuration rod 121. It is erected (pivotally attached).

  When the vertical vibration is generated in the floor slab W, the vertical vibration damping device 1 according to the present embodiment configured as described above has the second configuration rod 122 as illustrated by a two-dot chain line in FIG. The first structural bar 121 constrained so as to pivot is swung with a displacement amount (L2) amplified from the displacement amount (amplitude L1) of the floor slab with the base portion 12a as a fulcrum, and the second buffer portion 14 The urging member 141 and the buffering member 142 constituting the above efficiently absorb vibration.

  At the same time, even if there is a problem in the installation accuracy of the device, the shock absorber 13 absorbs the vibration to suppress the occurrence of out-of-plane vibration. Even when the weight of the vibration damping device may vibrate, the buffer 13 efficiently absorbs vibration.

  As described above, the shock absorber 13 which is the main part of the present invention is a vibration based on the installation accuracy of the apparatus that cannot be compensated by the effect of absorbing the vertical vibration of the floor slab W by the second shock absorber 14 or a vibration based on the vibration frequency. Can be efficiently absorbed to further improve the vibration control effect.

  As mentioned above, although the vertical vibration damping device concerning this embodiment was explained, the above-mentioned embodiment shows an example of the suitable embodiment of the present invention, and the present invention is not limited to it. Various modifications can be made without departing from the scope of the invention.

For example, the buffer section is not limited to a pair as in the present embodiment, but only one buffer section may be provided.
Furthermore, the link portion may be disposed on the stretching member such that the second constituent ridges face each other.

It is the front view which showed the outline of the vertical vibration damping device concerning this Embodiment. It is a schematic diagram of the conventional vertical vibration damping device.

Explanation of symbols

W Floor slab (structure)
W2 Support member 1 Vertical vibration damping device 11 Tension member 12 Link portion 13 Buffer portion 14 Second buffer portion 121 First configuration rod 122 Second configuration rod 12a Base (of the first configuration rod)
12b tip (of the first component)
12c Base (of the second component)
12d tip (of second component)

Claims (1)

A first component rod having a base pivotally attached to a structure supported by a support member, and a front portion positioned between a component surface of the structure and the first component rod tip, A link portion configured with a second configuration rod with a base pivotally attached to the first configuration tip portion,
A tension member erected between the base of the structure on the support member side or the support member, and the tip of the second component cage;
The structure which is pivotally mounted so as to be swingable in parallel with the tension member between the base portion of the structure on the support member side or the support member and the tip portion of the second component rod, and is expanded and contracted. A buffer that absorbs vibrations other than the components of the body;
With
The second component ridges are arranged so as to face each other outward or inward and are configured as a pair, and the buffer portions engaged with the respective link portions are the front portions of the second component ridges. Communicated with each other, the tension member is pivotally attached along the component surface so as to pivotally attach the tip portion of the second component rod and connect the tip portions of the second component rod; A vertical vibration damping device that suppresses vertical vibration by laying a second buffer portion that expands and contracts and absorbs vibration between the tip portions of the first configuration rod .

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