JP4553631B2 - Vibration control device - Google Patents

Description

  The present invention relates to a vibration control device that suppresses shaking of a building.

  There are social needs for retrofitting existing buildings. However, the reinforced concrete seismic wall can increase the seismic force, but if a large external force is input, it easily causes brittle fracture. In addition, since the construction of the seismic wall is large, a structural technique for protecting the building from an external force such as an earthquake is required instead of the seismic wall.

  Therefore, as shown in FIG. 9, the present applicant holds the four corners of the damping wall 86 rotatably with the bar 90 in the space portion of the building frame 84 composed of the beam 80 and the column 82, A vibration control wall structure in which an elastic rubber 88 is arranged between the frame 84 and the vibration control wall 86 is proposed.

  In this vibration control wall structure, when an external force such as an earthquake acts on the frame 84 and deforms, the frame 84 and the vibration control wall 86 are relatively displaced, and the elastic rubber 88 is deformed and exhibits a damping force. It absorbs vibration energy.

However, it is not easy to hang the damping wall 86 at a predetermined position of the frame 84, and the construction becomes large.
JP 2001-349091 A

  In view of such facts, the present invention aims to make it possible to easily construct a vibration control wall capable of absorbing vibration energy of a frame on the frame.

The invention according to claim 1 is a vibration control device attached to a frame composed of a beam and a column, a cross member pressed against the beam, and pin-coupled to both ends of the cross member. A vertical member constituting a frame, an expansion / contraction means for expanding and contracting the vertical member, a wall disposed in the frame, a damping member connecting the wall and the cross member or the vertical member, and the wall A connecting member that connects the wall body and the cross member so that an axis thereof has an angle with a diagonal line of the wall body, and connects the wall body so as to be rotatable in a plane.

In the invention described in claim 1, the cross member and the vertical member are pin-coupled to form a frame. A wall body is disposed in the frame body, and the wall body can be rotated in-plane within the frame body by a connecting member. That is, by connecting the connecting member and the wall body so that the axis of the connecting member has an angle with the diagonal line of the wall body, when the frame body and the wall body are relatively displaced, the connecting member gives a rotational force to the wall body. Thus, the relative displacement between the frame and the wall is increased, and the wall is greatly rotated in the plane within the frame.

  In addition, the lower cross member is placed on the lower beam member, the vertical member is extended by operating the expansion and contraction means, the upper cross member pin-bonded is pressed against the upper beam member, and the frame is placed inside the frame. Secure to. Thus, the frame can be fixed to the frame simply by operating the expansion / contraction means. Furthermore, since the positional relationship between the wall body and the frame body can be determined in advance by the extension amount of the expansion / contraction means and the connecting member, there is no need to attach and position one end of the connecting member to the frame as in the conventional case.

Further, the damping member that connects the wall body and the transverse member or the vertical member is deformed when the wall body rotates in the plane and exhibits a damping force to absorb the vibration energy of the frame.

  Furthermore, since the vertical member has a pin support structure that transmits only the axial force, it can be designed with consideration of only the axial force without considering the stress caused by the bending moment. Can be reduced. Moreover, it is not necessary to reinforce the existing column as a seismic reinforcement because the vertical member bears a part of the load of the beam.

In addition, since it is not an idea of suppressing the deformation of the frame with the wall body, it is sufficient to provide a strength that does not greatly deform itself. Therefore, the wall body may be a rigid member or a semi-rigid member. Further, the damping member may have viscosity, viscoelasticity, elastoplasticity, or rigid plasticity. Here, the rigid plastic, is intended to refer to a friction generating member for attenuating by utilizing frictional resistance.

  The invention described in claim 2 is characterized in that the connecting member is rotatably connected at both ends to the corners of the wall body and the cross member.

  In the invention according to claim 2, after setting the vibration control device on the frame, the connecting member is rotated to adjust the angle between the axis of the connecting member and the diagonal of the wall, thereby rotating the wall in the plane. The amount of displacement due to can be amplified. As a result, the damping member can be greatly deformed to exert a large damping force, thereby increasing the vibration reduction effect of the frame.

  The invention according to claim 3 is characterized in that the damping member extends from the vertical member toward the wall member, and an outer plate member extends from the wall member toward the vertical member and sandwiches the plate member from both sides. It is characterized by comprising.

  In the invention according to claim 3, the friction type damper is configured by sandwiching the inner plate extending from the vertical member from both sides with the outer plate extending from the wall. Due to the in-plane rotation of the wall, a frictional force is generated between the inner plate and the outer plate, and the vibration of the wall is attenuated.

  In addition, the rotational force of the wall body is transmitted as the axial force of the column through the outer plate material and the inner plate material.For example, when the frame is horizontally displaced to the left, an axial force acting upward is applied to the left column, It rotates counterclockwise and an axial force is applied downward from the wall to the column through the left outer plate and inner plate. For this reason, the axial force which acts on the column is reduced.

  According to a fourth aspect of the present invention, the damping member includes a first support member projecting from the cross member toward the wall member, and a second support member projecting from the wall member toward the cross member. It is characterized by comprising a support member and a linear motion damper having both ends rotatably connected to the first support member and the second support member so as to be parallel to the cross member. .

  In the invention according to claim 4, since both ends of the linear motion damper are rotatably connected to the first support member projecting from the cross member and the second support member projecting from the wall body, The linear damper can follow the rotational movement of the wall. For this reason, a commercially available hydraulic damper etc. can be utilized.

  The invention according to claim 5 is characterized in that the longitudinal member is formed with a hollow portion filled with a filler.

  In the invention according to claim 5, the longitudinal member is, for example, a hollow steel pipe in which a hollow portion filled with a filler such as concrete is formed, so that the hollow steel pipe is filled with concrete to increase strength and rigidity. Can enhance and reinforce existing pillars.

  Since the present invention has the above-described configuration, the vibration control device can be easily applied to the frame and the vibration energy of the frame can be absorbed.

  With reference to FIG. 1, a vibration control device 10 according to the present embodiment attached to a high-rise building having an RC structure will be described.

  The vibration control device 10 includes a vibration control wall 12 made of a flat plate as a constituent element. The damping wall 12 is a wall having high in-plane rigidity that does not undergo shear deformation, and the material is not limited, but it is preferable that the damping wall 12 is constituted by a lattice frame or a laminated panel.

  Brackets 14 and 16 are provided on four sides of the damping wall 12 and are disposed inside a frame body 22 composed of a horizontal steel material 18 and a vertical steel material 20. Brackets 24 and 26 are respectively provided at both ends of the horizontal steel member 18 and the vertical steel member 20 and are connected to each other by a connecting pin 28 so as to be rotatable.

  Further, a turnbuckle 30 is incorporated below the vertical steel member 20, and the vertical steel member 20 can be expanded and contracted by screwing the female screw on the vertical steel member 20 side and the male screw on the turnbuckle 30 side.

  Further, brackets 32 are provided on both sides of the horizontal steel member 18, the upper bracket 32 and the bracket 14 are connected by an arm plate 34 and a pin 36, and the vibration control wall 12 is suspended in the frame body 22. . Further, the lower bracket 32 and the bracket 16 are connected by a turnbuckle 38 as a connecting member and a pin 40, and the vibration control wall 12 is supported in the frame body 22.

  Here, the axis of the arm plate 34 and the turnbuckle 38 are connected so as to have an angle with the diagonal of the damping wall 12 (see FIG. 3B), and the frame 22 and the damping wall 12 are relatively displaced. At this time, the arm plate 34 and the turnbuckle 38 impart a rotational force to the damping wall 12 to increase the relative displacement between the damping wall 12 and the frame body 22, and the damping wall 12 is enlarged in the frame body 22. Rotate in-plane.

  In addition, an inner plate member 42 made of an elastic-plastic material projects from the side surface of the vertical steel member 20 toward the damping wall 12. On the other hand, two outer plate members 44 project from the damping wall 12 so as to sandwich both surfaces of the inner plate member 42. An elongated hole 46 is formed in the inner plate member 42 and the outer plate member 44, and a bolt 48 is inserted into the elongated hole 46, and the inner plate member 42 is fastened by the outer plate member 44, thereby providing an elastic-plastic friction type damper as a damping member. Composed. With this elastic-plastic friction type damper, rigidity and strength can be set separately. In this embodiment, when the inner plate member 42 and the outer plate member 44 are deformed beyond the elastic limit, vibration energy is absorbed by the yield point strength.

  Further, a support member 50 protrudes from the horizontal steel material 18 toward the vibration control wall 12, and a support member 52 protrudes from the vibration control wall 12 toward the horizontal steel material 18. The rod 56 of the direct acting hydraulic damper 54 is rotatably connected to the support member 50 by a pin 60, and the cylinder 58 of the hydraulic damper 54 is rotatably connected to the support member 52 by a pin 62. Thus, the hydraulic damper 54 is disposed so as to be parallel to the horizontal steel member 18 and the vibration control wall 12.

  It should be noted that the mounting position of the lower hydraulic damper 54 is such that the positional relationship between the upper hydraulic damper 54, the cylinder and the rod is reversed left and right.

  Here, a construction method of the vibration control device according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 3 (B), the horizontal steel member 18 of the frame 22 is placed on the lower beam 68 to the frame 70 of the high-rise building composed of the columns 66 and beams 68 shown in FIG. The buckle 30 is tightened, and as shown in FIG. 3C, the upper horizontal steel member 18 is pressed against the upper beam 68, and the vibration control device 10 is set in the frame 70. Since the frame body 22 can be fixed to the frame 70 simply by operating the turnbuckle 30 as described above, it is not necessary to attach and position one end of the arm plate to the frame 70 as in the prior art, thereby shortening the construction period. Can be achieved.

  Next, by turning the turnbuckle 38 and adjusting the angle between the axis of the turnbuckle 38 and the diagonal line of the damping wall 12, the amount of displacement due to in-plane rotation of the damping wall 12 is amplified as will be described later. Can be made. Further, as shown in FIG. 3C, since the lower hydraulic damper 54 is parallel to the vibration control wall 12, an eccentric force does not act on the hydraulic damper 54. Instead of the turnbuckle 38, a cap nut and a long screw may be used to adjust the angle between the long screw axis and the diagonal of the damping wall 12.

  Next, the operation of the vibration control device according to this embodiment will be described.

  As shown in FIG. 1, for example, when the frame 70 is displaced to the right so as to be indicated by a two-dot chain line, the axes of the arm plate 34 and the turnbuckle 38 are connected so as to have an angle with the diagonal of the damping wall 12. Therefore, the arm plate 34 and the turnbuckle 38 apply a rotational force to the vibration control wall 12 to increase the relative displacement between the frame body 22 and the vibration control wall 12, and the vibration control wall 12 is moved within the frame body 22. Rotate greatly in the plane.

  As a result, the elastic-plastic friction type damper and the hydraulic damper 54 composed of the inner plate member 42 and the outer plate member 44 are greatly deformed to exert a large damping force and absorb the vibration energy of the frame 70. Here, since the rod 56 and the cylinder 58 of the hydraulic damper 54 are rotatably connected, a force acts only in the linear motion direction and no eccentric force acts.

  Furthermore, since the vertical steel member 20 has a pin support structure with the connecting pin 28 that transmits only the axial force, it can be designed in consideration of only the axial force without basically considering the stress due to the bending moment. For this reason, the design cross section of the vertical steel material 20 can be made small, and cost can be reduced. In addition, since the vertical steel member 20 bears a part of the load of the beam 68, it is not necessary to reinforce the existing column 66 as earthquake-proof reinforcement.

  Further, as shown in FIG. 1, the damping wall 12 rotates counterclockwise, but at this time, a force is generated to push the vertical steel member 20 downward through the inner plate member 42 and the outer plate member 44, This force acts in the opposite direction to the extraction force acting on the left column 66 and stabilizes the RC structure high-rise building.

  Next, the vibration control device according to the second embodiment will be described.

  In the second form, instead of the elastic-plastic friction type damper constituted by the inner plate member 42 and the outer plate member 44 of the first form, a damper as a damping member is constituted by two curved leaf springs 76. The folded portion 76A of the leaf spring 76 is processed in an arc shape, and the mounting portion 76B having a flat shape is provided on both sides of the bracket 78 attached to the end surface of the vibration control wall 12 and the bracket 80 attached to the vertical steel member 20. The two leaf springs 76 function as an elasto-plastic damper.

  That is, when the damping wall 12 rotates in the plane in the A direction, the leaf spring 76 extends and exhibits a damping force, and when the damping wall 12 rotates in the plane in the opposite direction to the A, the leaf spring 76 increases the curvature. Thus, it is a configuration that exhibits a damping force.

  In addition, as shown in FIG. 6, the turnbuckle 30 and the vertical steel material 20 (for example, a hollow steel pipe) are made into a hollow structure so that the axial rigidity of the turnbuckle 30 and the vertical steel material 20 is improved and the turnbuckle 30 is not loosened. The axial force transmission force may not be deteriorated by injecting and filling concrete or grout from the inlet 23.

  Furthermore, the strength of the vertical steel member 20 can be reduced by surrounding the space of the horizontal steel member 18, the vertical steel member 20 and the column 66 shown in FIG. Construction cost can be reduced.

  Moreover, as shown in FIG. 7, the horizontal steel material 18 may be made into a hollow structure and concrete may be injected to improve the rigidity. Further, the horizontal steel material 18 may be fixed to the beam 68 with a chemical anchor or the like.

  In FIG. 1, both sides of the horizontal steel material 18 have a pin support structure. However, as shown in FIG. 8, a pin 39 projecting from the end surface of the vertical steel material 20 is provided in the recess 37 formed in the horizontal steel material 18. A configuration of fitting may be used.

It is a front view which shows the damping device which concerns on a 1st form. It is a perspective view which shows the connection structure of the damping wall of the damping device which concerns on a 1st form. It is a front view which shows the construction procedure of the damping device which concerns on this form. It is a front view which shows the damping device which concerns on a 2nd form. It is a perspective view which shows the connection structure of the damping wall of the damping device which concerns on a 2nd form. It is a perspective view which shows the connection structure of the damping wall of the damping device which concerns on a modification. It is a perspective view which shows the filling structure of the horizontal steel material of the damping device which concerns on a modification. It is a perspective view which shows the connection structure of the damping wall of the damping device which concerns on a modification. It is a front view which shows the conventional damping device.

Explanation of symbols

12 Seismic wall (wall)
18 Cross steel (cross member)
22 Vertical steel (longitudinal)
30 Turnbuckle (stretching means)
34 Arm plate (connecting member)
38 Turnbuckle (connecting member)
42 Inner plate material (damping member)
44 Outer plate material (damping member)
50 Support member (first support member)
52 Support member (second support member)
54 Hydraulic damper (linear damper)

Claims (5)

In the seismic control device attached to the frame composed of beams and columns,
A cross member pressed against the beam;
Longitudinal members that are pin-coupled to both ends of the transverse member and constitute a frame with the transverse member;
Expansion and contraction means for expanding and contracting the longitudinal member;
A wall disposed in the frame;
A damping member connecting the wall and the cross member or the vertical member;
A connecting member that is connected to the wall body and the cross member so that an axis thereof has an angle with a diagonal line of the wall body;
A vibration control device characterized by comprising:   2. The vibration control device according to claim 1, wherein both ends of the connecting member are rotatably connected to corner portions of the wall body and the cross member so as to expand and contract.   The damping member is composed of an inner plate material that projects from the vertical member toward the wall member, and an outer plate member that projects from the wall member toward the vertical member and sandwiches the plate member from both sides. The seismic control device according to claim 1 or 2.   The damping member includes a first support member protruding from the cross member toward the wall member, a second support member protruding from the wall member toward the cross member, and parallel to the cross member. The linear motion damper having both end portions rotatably connected to the first support member and the second support member so as to be The vibration control device according to item 1. The vibration control device according to any one of claims 1 to 4, wherein the longitudinal member is formed with a hollow portion filled with a filler.

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