JP2014101638A - Vibration control structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control structure that can effectively extend and contract oil dampers according to vibration and enhance attenuation effect on the vibration.SOLUTION: A vibration control structure includes: an upper beam 1; a lower beam 2; two columns 3; an upper support body 10 which is joined to the two columns 3 at positions close to upper ends respectively and droops from the joining places; a lower support body 20 which is joined to the two columns 3 at positions close to lower ends respectively and raised from joining places; a swing body 30 which is joined turnably to a lower part of the upper support body 10 and also joined turnably to an upper part of the lower support body 20; and oil dampers 50 which are joined turnably to the column 3. The oil dampers 50: are joined turnably to a location projecting laterally beyond a region connecting the joining place between the upper support body 10 and the swing body 30 and the joining place between the lower support body 20 and the swing body 30; and extend and contract as the swing body 30 turns.

Description

  The present invention relates to a vibration control structure that attenuates vibration of a building during an earthquake.

  Conventionally, many researches and developments have been made on damping structures, and in particular, damping structures using oil dampers are known. Patent Document 1 discloses a vibration damping structure for a structure in which an oil damper is interposed between a tip of a brace having an inverted V shape or a V shape and a beam.

JP-A-5-311920

  When an oil damper is interposed between the brace and the beam as in the vibration damping structure described in Patent Document 1, the amount of expansion / contraction of the oil damper is the interlayer displacement (the relative displacement in the horizontal direction between the upper layer and the lower layer). ) Is almost equal to). For this reason, there is a possibility that the amount of expansion / contraction of the oil damper is insufficient and a sufficient damping effect cannot be obtained, or the amount of expansion / contraction of the oil damper exceeds an allowable value.

  The present invention has been made to solve such a problem, and provides a damping structure capable of effectively expanding and contracting an oil damper according to displacement and enhancing the vibration damping effect. With the goal.

  The vibration damping structure according to the present invention is joined to the upper beam, the lower beam, two columns erected between the upper beam and the lower beam, and positions near the upper ends of the two columns, The upper support suspended from the joint and the two pillars are joined at positions near the lower ends of the two pillars, and the lower support standing from the joint and the upper support and the lower support are pivotally joined. And has an extension part extending in the lateral direction from the region connecting the joint part with the upper support and the joint part with the lower support, according to the relative displacement between the upper support and the lower support. And one end of which is pivotally joined to one of the two pillars, and the other end is pivotally joined to the extending portion of the oscillator. And an oil damper that expands and contracts as it swings.

  In the present invention, when interlayer deformation occurs in the vibration control structure, the upper beam and the upper support are displaced relative to the lower beam and the lower support in the horizontal direction, and the swinging body swings accordingly. The oil damper expands and contracts. Therefore, the displacement due to the interlayer deformation can be reliably transmitted to the oil damper via the rocking body, so that the oil damper can be effectively expanded and contracted, and the vibration damping effect can be enhanced.

  Furthermore, it is preferable that the extending portion of the oscillator be sandwiched between a pair of out-of-plane movement restraining pieces provided on the pillar. With this configuration, the movement of the rocking body in the out-of-plane direction (protrusion) when the interlayer deformation occurs is surely limited, so that the displacement due to the interlayer deformation can be more reliably transmitted to the oil damper. Thus, the vibration damping effect can be further enhanced.

  Further, the upper support and the lower support include a fitting portion for joining to the column, the column includes a fitting receiving portion into which the fitting portion is fitted, and the fitting portion and the fitting receiving portion are mutually connected. It is preferable that each has a slope surface that is in contact with and inclined with respect to the horizontal direction. By comprising in this way, a slip will be suppressed compared with the case where a joining surface is simply made to contact | abut and bolt-joining, and an oil damper can be expanded and contracted still more effectively.

  According to the present invention, the oil damper can be effectively expanded and contracted according to the displacement, and the vibration damping effect can be enhanced.

It is a side view of the damping structure concerning a first embodiment of the present invention. It is side surface sectional drawing which shows the junction part of the pillar in FIG. 1, and an upper support body. It is III-III sectional drawing in FIG. It is a figure explaining the relationship between the distance between fulcrum in a rocking body in Drawing 1, and the amount of rotation. It is a side view of the damping structure concerning a second embodiment of the present invention.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
A vibration damping structure according to a first embodiment of the present invention will be described with reference to FIGS. The damping structure 100 is a structure used for a steel structure building, and this building is a multi-layered building having a shaft set formed by joining columns made of square steel pipes and beams made of H-shaped steel. A floor made of an ALC (lightweight cellular concrete) panel is supported by a beam spanned between two pillars, and each level is formed in a region sandwiched between a lower floor and an upper floor. The damping structure 100 is provided in each of a plurality of levels of the building. Hereinafter, the vibration suppression structure 100 will be described by taking one layer as an example.

  As shown in FIG. 1, the vibration damping structure 100 includes an upper beam 1 and a lower beam 2 that extend in the horizontal direction, two columns 3 erected between the upper beam 1 and the lower beam 2, and two The upper support body 10 and the lower support body 20 provided between the pillars 3, the rocking body 30 supported by the upper support body 10 and the lower support body 20, and the one pillar 3 and the rocking body 30 are provided. The oil damper 50 is provided.

  A column head 3 a that is a joint with the upper beam 1 is provided at the upper end of the column 3, and a column leg 3 b that is a joint with the lower beam 2 is provided at the lower end of the column 3. Yes. The column 3 is joined to the upper beam 1 and the lower beam 2 via a column head 3a and a column leg 3b, respectively. A pair of out-of-plane movement restraining pieces 41 project side by side so as to sandwich the extending portion 31 at a position corresponding to the tip of the extending portion 31 of the swinging body 30 described later on the side surface of the column 3. Similarly, a pair of out-of-plane movement restraining pieces 42 are projected in a side-by-side manner at a position corresponding to the tip of the extending portion 32.

  The upper support 10 is composed of a swing support 15 made of a substantially triangular plate, two diagonal members 13 each having one end welded to the swing support 15, and two diagonals 13. And a joint portion 11 welded to the other end of each of them, and has a substantially V shape in a side view as a whole. In the upper support 10, the joint 11 is joined to a position near the upper end of each of the two pillars 3 (in the vicinity of the pillar head 3 a). As a result, the upper support 10 is separated from the joint with the pillar 3. The hanging aspect is embodied. A shaft support 16 having a hole through which a pin for supporting the swinging body 30 is inserted is formed in the vicinity of the apex (lower end) of the upper swinging support 15 arranged in an inverted triangle shape. Has been. In addition, since one diagonal 13 is shorter than the other diagonal 13, the swing support portion 15 is arranged to be biased toward one (left) column 3 side.

  As shown in FIG. 2, the joint portion 11 includes a joint portion 11a welded to the end portion of the diagonal member 13, a seat plate portion 11e welded so as to face the column 3 with respect to the joint portion 11a, and a seat plate. A pair of wedge parts (fitting parts) 11c welded to positions near the upper end and lower end of the surface of the part 11e facing the pillar 3 and a pair of welds straddling the joint part 11a and the seat plate part 11e And a rib portion 11d. In addition, four holes 11f for inserting the bolts 11b are formed in the seat plate portion 11e.

  On the other hand, a pair of upper and lower wedge receiving portions (fitting receiving portions) 3c corresponding to the wedge portion 11c are welded to the surface of the portion of the column 3 where the bonding portion 11 of the upper support 10 is joined. In addition, a spacer 3e for forming a space having a predetermined interval is welded to an intermediate position between the pair of wedge receiving portions 3c. A hole 3f through which the bolt 11b is inserted is formed corresponding to the hole 11f. A backing plate 3d is welded to the inner side of the pillar 3, and tap holes for screwing with the bolts 11b are formed at positions corresponding to the holes 3f of the backing plate 3d.

  The upper support 10 and the column 3 are joined by aligning the holes 11f and 3f, inserting the bolts 11b, and screwing into the tap holes of the backing plate 3d. The wedge part 11c of 11 and the wedge receiving part 3c of the pillar 3 are formed with slope surfaces 11g and 3g, respectively, and the slope parts 11g and 3g are slidably contacted with each other by screwing of the bolt 11b. By being fitted into the part 3c, it is firmly joined.

  The lower support 20 (see FIG. 1) has substantially the same configuration as the upper support 10, and the upper support 10 and the upper and lower sides and the front and back are reversed, and the two pillars 3 are close to the lower ends (column bases). The joint portion 11 is joined at a position in the vicinity of the portion 3 b, and as a result, the lower support 20 embodies an aspect in which it stands up from the joint portion with the column 3. A shaft support portion 26 is formed in the vicinity of the apex (upper end) of the lower swing support portion 15 arranged in a triangular shape, and the function of this shaft support portion 26 is substantially the same as that of the shaft support portion 16. The same. The swing support 15 (shaft support 16) of the upper support 10 and the swing support 15 (shaft support 26) of the upper support 20 are unevenly distributed in the same direction.

  The oscillating body 30 is a plate-like member, and has two holes through which pins are inserted corresponding to the positions of the shaft support portion 16 of the upper support body 10 and the shaft support portion 26 of the lower support body 20. In addition, the upper support 10 and the lower support 20 are rotatably joined to each other through pins inserted into the holes of the shaft support portions 16 and 26. It has the extension parts 31 and 32 extended in the horizontal direction rather than the area | region which connects the axial support part 16 and the axial support part 26. As shown in FIG. As shown in FIG. 3, the extended portions 31 and 32 are sandwiched between a pair of out-of-plane movement restraining pieces 41 and 42 with a slight clearance at their tip portions.

  The oil damper 50 includes a cylindrical casing 50 a in which oil is sealed, and a piston rod 50 b protruding from the casing 50 a. One end protrudes from the bracket 33 and the other end extends from the extending portion 32 of the oscillator 30. Are pivotally supported by respective tip portions via respective pins.

  Next, an operation when a horizontal force acts on the vibration damping structure 100 to cause interlayer deformation will be described. First, for example, when a force in the right direction in FIG. 1 is applied to the upper beam 1, the upper beam 1 moves to the right relative to the lower beam 2 (the relative displacement amount at this time is a so-called “ Interlayer displacement "). Along with this, the two pillars 3 are tilted to the right, the upper support 10 is translated in the right direction relative to the lower support 20, and a relative displacement equal to the “interlayer displacement” is generated in both. In response to this displacement, the oscillating body 30 supported by the shaft support portions 16 and 26 tilts clockwise. At this time, the extension portion 32 moves downward, whereby the upper oil damper 50 is pulled and extended, and the lower oil damper 50 is compressed and shortened. On the other hand, when a leftward force in FIG. 1 is applied to the upper beam 1, the movement direction of each member is reversed left and right or upside down, and the expansion and contraction operation of each oil damper 50 is reversed. By repeating such an operation, the vibration is attenuated.

  As described above, in the vibration control structure 100, when the interlayer deformation occurs, the upper beam 1 and the upper support 10 are displaced relative to the lower beam 2 and the lower support 20, and the swinging body 30 swings accordingly. As a result, the two oil dampers 50 expand and contract. Therefore, the displacement due to the interlayer deformation is reliably transmitted to the oil damper 50 via the oscillating body 30, so that the oil damper 50 can be effectively expanded and contracted, and the vibration damping effect can be enhanced.

  Further, since the extending portion 31 is sandwiched between the pair of out-of-plane movement restraining pieces 41 and the extending portion 32 is sandwiched between the pair of out-of-plane movement restraining pieces 42, the rocking body 30 when the interlayer deformation occurs. Movement in the out-of-plane direction (normal direction with respect to the structural surface of the vibration damping structure 100) is reliably restricted, so that the force generated by the interlayer deformation can be more reliably transmitted to the oil damper 50. This is possible, and the vibration damping effect can be further enhanced.

  Moreover, in the junction part of the upper support body 10 and the lower support body 20, and the two pillars 3, the sloped surface 11g of the wedge part 11c by the side of the joint part 11a and the sloped surface 3g of the wedge receiving part 3c by the side of the pillar 3 are provided. Since it is comprised so that it may contact | abut, compared with the case where a joint surface is made to contact | abut simply and bolt-joins, a slip is suppressed and the oil damper 50 can be expanded-contracted still more effectively.

  In the present embodiment, the amount of expansion / contraction of the oil damper 50 with respect to a predetermined interlayer displacement can be increased or decreased by increasing or decreasing the separation dimension a (see FIG. 1) between the shaft support portions 16 and 26. Specifically, for example, as shown in FIGS. 4A and 4B, two vibration damping structures differing only in the distance between the shaft support portions 16 and 26 (FIG. 4A is between the shaft support portions 16 and 26. 4), the vibration damping structure with a smaller separation dimension between the shaft support portions 16 and 26 shown in FIG. Since it becomes large, the displacement of the extension parts 31 and 32 also becomes large. Therefore, the amount of expansion / contraction of the oil damper 50 joined to the tip also increases.

  Therefore, in this embodiment, it is possible to adjust the expansion / contraction amount of the oil damper 50 with respect to a predetermined interlayer displacement by changing the separation dimension of the shaft support portions 16, 26, for example, increasing the expansion / contraction amount of the oil damper 50. The damping effect can be enhanced, and the design intent of the damping structure 100 can be achieved, for example, by reducing the expansion / contraction amount of the oil damper 50 so as not to exceed the deformation limit of the oil damper 50. Various adjustments for reflection can be performed.

(Second Embodiment)
Next, a vibration damping structure 200 according to the second embodiment of the present invention will be described with reference to FIG. The vibration damping structure 200 according to the present embodiment includes the same elements and members as those of the vibration damping structure 100 according to the first embodiment, and the same reference numerals as those of the vibration damping structure 100 are assigned to the similar elements and members. Detailed description will be omitted.

  The difference from the vibration damping structure 100 in the first embodiment is that the upper support 10, the lower support 20, and the swinging body 30 are symmetrical, and the left and right columns 3 and the extending portion 31 are also vertically The point is that two oil dampers 50 are provided.

  As mentioned above, although this invention was demonstrated based on each embodiment, this invention is not limited to said each embodiment. For example, instead of the column head 3a shown in FIG. 1, the column 3 is formed by using a vertical roller joint that transmits only the horizontal force from the upper beam 1 to the columns 3 and 4 and does not transmit the vertical force and moment. The upper beam 1 may be joined. By using the vertical roller joint in this way, the vertical force is not transmitted from the upper beam 1 to the two columns 3 and 4, and the vertical force is not transmitted to the upper floor and the lower floor. An independent structural study can be performed for each floor without considering the installation positions of the vibration structures 100 and 200. That is, since the structural calculation for changing the positions of the vibration damping structures 100 and 200 is not necessary, the structural calculation of the building can be simplified.

  Further, at least one oil damper 50 may be provided, and the joining position with the pillar 3 and the rocking body 30 may be adjusted as appropriate. Also, the upper support 10 and the lower support 20, the fitting portion 11 c and the fitting receiving portion 3 c, the swinging body 30, and the like may be appropriately different in shape.

  DESCRIPTION OF SYMBOLS 1 ... Upper beam, 2 ... Lower beam, 3 ... Column (two columns), 3c ... Wedge receiving part (fitting receiving part), 3g ... Gradient surface (gradient surface formed inclining with respect to horizontal direction) ) 10, 110 ... upper support, 11c ... wedge part (fitting part), 11g ... gradient surface (gradient surface formed inclined with respect to the horizontal direction), 20, 120 ... lower support, 30, DESCRIPTION OF SYMBOLS 130 ... Oscillator, 31, 32, 131, 132 ... Extension part, 41, 42 ... Out-of-plane movement restraint piece, 50 ... Oil damper, 100, 200 ... Damping structure.

Claims (3)

The upper beam,
The bottom beam,
Two pillars erected between the upper beam and the lower beam;
An upper support body joined to a position near the upper end of each of the two pillars and depending from the joint location;
A lower support that is joined to a position near the lower end of each of the two pillars and stands up from the joint;
An extension that is pivotally joined to the upper support and the lower support and extends in a lateral direction from a region connecting the joint with the upper support and the joint with the lower support. A swinging body that swings according to relative displacement between the upper support and the lower support,
One end is pivotally joined to one of the two pillars, and the other end is pivotally joined to the extending portion of the rocking body, and expands and contracts as the rocking body swings. And an oil damper.   2. The vibration damping structure according to claim 1, wherein the extending portion of the rocking body is sandwiched between a pair of out-of-plane movement restraining pieces provided on the pillar. The upper support and the lower support include a fitting portion for joining to the pillar,
The column includes a fitting receiving portion into which the fitting portion is fitted,
3. The vibration damping structure according to claim 1, wherein the fitting portion and the fitting receiving portion each have a slope surface that is in contact with each other and is inclined with respect to a horizontal direction.

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