JP5582793B2 - Damping structure and building - Google Patents

Description

  The present invention relates to a vibration damping structure for suppressing deformation of a building due to an earthquake or the like and attenuating vibration of the building, and a vibration damping structure using the same.

  In recent years, there has been a strong demand for building earthquake resistance in the event of an earthquake. For this reason, in order to improve the earthquake resistance of buildings and reduce earthquake damage, By incorporating a damping structure into the building to suppress deformation, attenuate column tilt vibration and horizontal relative vibration between the foundation and the beam, etc., thereby absorbing vibration energy, Various techniques for suppressing various deformations and suppressing shaking of buildings have been proposed.

  For example, Patent Document 1 discloses a damping wall panel in which an opening is formed in a wall panel for building, and a damping device is attached in the opening, and the damping device includes the opening. A pair of support portions provided when the pair of support portions are displaced by the vibration and supported by the pair of support portions. Comprising a pendulum member configured to swing around a substantially central portion therebetween, and a damping member provided between an end of the pendulum member and the frame, amplifying the deformation of the pendulum member, A technology for effectively using a vibration control function from a small deformation of a building is disclosed.

  However, this type of vibration damping structure uses mechanical fastening means such as bolts and nuts at the connecting part of the frame and the support part, especially when considering long-term durability over several decades. For example, there is a risk that the connected portion may be worn away due to repeated performance of the vibration damping function, or conversely, the connected portion may be fixed due to rust due to the prolonged inactive period and the vibration damping function may be reduced.

JP 2006-152788 A

  Therefore, the present invention provides a highly durable vibration damping structure capable of maintaining an excellent vibration damping function over a long period of time, and a vibration damping structure using the same.

The vibration damping structure according to the present invention is attached to at least one of a pair of panels, a base and a beam of a frame member of a building that defines a square opening, and is attached to at least one of a base and a beam. a fixing bracket which projects, be comprised comprises a movable bracket which is connected via a damping material to the fixing bracket, each panel, Ri Na linked viscoelastic body movable bracket, a pair A friction damper is provided between the panels .

Here, the “frame member of a building” refers to a skeleton member such as a pillar, foundation, or beam, and a rectangular opening is formed by a pair of pillars and a foundation and a beam or a pair of beams. The one to divide.
“Connecting to a fixed bracket via a damping material” means that the damping material is sandwiched between fixed brackets, or the fixed bracket is connected via a damping material.
As a form of “connecting with a viscoelastic body”, not only a single panel is sandwiched between two movable brackets via a viscoelastic body, but also a single movable bracket is bonded between two panels. There is a case of being sandwiched through an elastic body.
“Vibration damping material” can be a natural rubber, synthetic rubber, silicone, or other thermosetting resin, or viscoelastic material using a styrene, acrylic, or diene thermoplastic resin. .
"Viscoelastic body" is a viscoelastic body using thermosetting resins such as natural rubber, synthetic rubber, silicon and unvulcanized rubber, and thermoplastic resins such as styrene, acrylic and diene. Can be used.
“Friction damper” is a frictional force that is converted into a damping force when the surfaces rub against each other. The material used for the sliding surface is an organic polymer (used for automobile brake materials) as a binder. And composite materials composed of various fibers and organic / inorganic fillers, sintered metal friction materials, polytetrafluoroethylene friction materials, metal friction materials, and the like can be used.

  In such a vibration damping structure, more preferably, a core member fixed to one of the movable bracket and the panel and a cylindrical member fixed to the other are provided, and the core member is formed by a viscoelastic body inside the cylindrical member. Connect.

  Also preferably, the viscoelastic body has a higher shear elastic modulus than the damping material.

  The damping structure according to the present invention is formed using any of the above-described damping structures.

  In the vibration damping structure of the present invention, each panel is connected to the movable bracket by a viscoelastic body without using mechanical fastening means such as bolts and nuts, so that wear and rust generated in the conventional connecting portion are generated. The durability of the vibration damping structure can be continued over a long period of time without any occurrence.

  Also, in such a vibration control structure, if the building is deformed by rolling vibration such as an earthquake, the base and beam of the building are displaced left and right, and the pair of panels are displaced via the fixed bracket and the movable bracket. By restraining the tilt vibration of the column with the panel, the vibration damping material interposed between the fixed bracket and the movable bracket allows various inputs during the earthquake, and the force of the column tilt vibration through the panel. Because the combined force of each bracket and each bracket attached to the base and the torsional direction force due to the direction of action of the resultant force acts on the damping material, the damping material absorbs a large amount of energy And vibration caused by the occurrence of an earthquake based on the deformation reaction force of each viscoelastic body by the viscoelastic body interposed between the movable bracket and the panel. It can greatly improve the damping effect. As a result, it is possible to cope with various combined deformations.

(A) is a schematic front view which shows one Embodiment of the damping structure of this invention, (b) is a schematic which shows a mode when the deformation | transformation by vibration generate | occur | produces in the damping structure of (a). It is a front view. It is the schematic which shows the connection state of a panel and a bracket.

The vibration damping structure of the present invention will be described below in detail with reference to the drawings.
FIG. 1A is a schematic front view showing one embodiment of the vibration damping structure of the present invention, and FIG. 1B is a diagram when the vibration damping structure of FIG. It is a schematic front view which shows a mode.

  The frame member 1 in the figure includes a base 2, two columns 3 extending in the vertical direction with respect to the base 2, and a beam 4 that horizontally connects the columns 3 to each other. For example, the height is 2000 to 3000 mm. Thus, a vertically long rectangular opening 5 having a width of 500 to 1000 mm is defined.

In the figure, each column 3 is provided with an isosceles trapezoidal panel 6 inside such a square opening 5 defined by the frame member 1, and is composed of a rigid member such as a steel material, for example. The L-shaped metal fitting is fixed to the column with a nail or a screw (screw) at a predetermined interval from the base 2 and the beam 4 on the long side (upper or lower base) side of the panel 6 Etc., and each short side (upper base or lower base) is arranged substantially in parallel.
Preferably, a friction damper 7 is provided between the pair of panels 6 by bonding a flat friction material or fixing it with metal fittings and screws.

  In addition, at least one of the base 2 and the beam 4, both in the figure, for example, the long side (upper base or lower base) side of the isosceles trapezoidal fixing bracket 8 is L-shaped with a predetermined distance from both pillars 3. Fix the metal fittings with nails or screws (wood screws) and bond them. The short side (upper or lower base) side of the movable bracket 10 having an isosceles trapezoid shape, for example, is bonded to the short side (upper or lower base) side of these fixed brackets 8 via a damping material 9. . These brackets 8 and 10 are provided so as to protrude from the base 2 and the beam 4 to the square opening 5.

  The brackets 8 and 10 can be made of, for example, a rigid body (steel material) that is paired with a gap between the base 2 and the beam 4 on each side of the front and back sides. The protrusion length can be 100 to 200 mm, and the protrusion width can be 100 to 200 mm.

Further, in this vibration damping structure, the viscoelastic body 11 is connected to the apex peripheral part on the short side of each panel 6 and the apex peripheral part on the long side of the movable bracket 10 in the drawing.
That is, each panel 6 is fixed to the base 2 and the beam 4 via the fixed bracket 8 and the movable bracket 10 on the short side and the column 3 on the long side, and can cope with various combined deformations. it can.

In this case, the thickness of each damping material 9 and viscoelastic body 11 is preferably in the range of 1 to 95 mm, and the surface area is preferably in the range of 100 to 62500 mm ² . With this range, the panel 6 and the brackets 8 and 10, the damping material 9 and the viscoelastic body 11 can secure a bonding force, and a desired damping effect can be obtained.
By the way, the damping material 9 and the viscoelastic body 11 can also have the same or different physical properties and sizes, respectively.

In such a vibration damping structure, it is more preferable that either one of the movable bracket 10 and the panel 6, in the figure, a core member 12 fixed to the panel 6 and a cylindrical member 13 fixed to the movable bracket 10 are provided. The core member 12 is connected by the viscoelastic body 11 inside the member 13.
This configuration enables rotational movement similar to that of a conventional pin structure using bolts and nuts. Since there is no sliding part like the pin structure, there is no performance degradation due to friction and wear, and there is no stickiness. By imparting damping properties to the elastic body 11, further vibration damping performance can be improved.

  In addition, preferably, by providing the friction damper 7 between the pair of panels 6, it is possible to further add damping caused by the friction damper 7 and improve the vibration damping performance.

  By the way, the viscoelastic body 11 has a greater shear elastic modulus than that of the vibration damping material 9, so that the viscoelastic body 11 restrains torsion and shear deformation between the panel 6 and the movable bracket 10, and the vibration damping material 9 performs high damping. The vibration control effect can be enhanced by demonstrating the function.

For example, as the damping material 9, a thermosetting resin such as natural rubber, synthetic rubber, or silicon, or a thermoplastic resin such as styrene, acrylic, or diene can be used.
As the viscoelastic body 11, unvulcanized rubber is blended, and vibration damping performance can be enhanced by blending the unvulcanized rubber. Further, the viscoelastic body 11 can improve the vibration damping performance by using viscoelasticity with an equivalent damping constant (Heq) = 0.15 or more, and can effectively absorb energy from minute deformation to large deformation. At the same time, even after plastic deformation, it is most preferable to have the property of restoring the original hysteresis characteristics after several days.

The viscoelastic body 11 is made of soft rubber having a shear modulus of 0.1 to 0.3 N / mm ² , and the damping material 9 has a shear modulus of 0.4 to 0.7 N when the shear strain is 100%. When a hard rubber of / mm ² is applied, the viscoelastic body 11 shown in FIG. 2 moves in the direction perpendicular to the axis in slight vibration (the core member 12 moves slightly in the orthogonal direction within the cylindrical member 13). In the case of a large earthquake (the core member 12 stops the displacement in the direction perpendicular to the axis by the cylindrical member 13 and the viscoelastic body 11 provided therebetween), the vibration damping structure tries to deform further. Then, the core member 12 and the cylindrical member 13 shown in FIG. 2 are deformed in the rotation direction, and the hard vibration damping material 9 is deformed, so that the vibration damping function can be exhibited from minute deformation to large earthquake.

  It is preferable to use the above-mentioned vibration control structure to form a vibration control structure such as a wooden house (conventional wooden framed house), a steel prefabricated house, or a steel building. In addition to being large, it can be provided in a space-saving manner at low cost.

DESCRIPTION OF SYMBOLS 1 Frame member 2 Base 3 Column 4 Beam 5 Rectangular opening 6 Panel 7 Friction damper 8 Fixed bracket 9 Damping material 10 Movable bracket 11 Viscoelastic body 12 Core member 13 Cylindrical member

Claims (4)

A pair of panels attached to each column of a frame member of a building that defines a square opening, a fixing bracket that is attached to at least one of a base and a beam and protrudes toward the square opening, and this fixing In the damping structure comprising a movable bracket connected to the bracket via a damping material,
Each panel, Ri Na linked viscoelastic body movable bracket,
A vibration damping structure comprising a friction damper between a pair of panels .   2. The control according to claim 1, wherein a core member fixed to one of the movable bracket and the panel and a cylindrical member fixed to the other are provided, and the core member is connected by a viscoelastic body inside the cylindrical member. Shaking structure. The damping structure according to claim 1 or 2 , wherein the viscoelastic body has a shear elastic modulus larger than that of the damping material. A damping structure provided with the damping structure according to any one of claims 1 to 3 .

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