JPH0742724B2 - Vibration control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention exhibits viscous damping performance during relative horizontal movement between upper and lower structures, or between upper and lower floors, or relative movement between equipment and structures. It is related to the vibration control device.

[Problems to be Solved by the Invention]

In a seismic isolation structure that uses laminated rubber etc. as a seismic isolation device,
An energy absorbing device such as a damper or a damping device is also used in order to suppress the increase of the shaking of the building and to secure the safety at the time of its displacement. A viscous damper having a mechanism that exhibits damping performance by utilizing a viscous shearing force generated between the two by a laminar flow of a viscous fluid interposed therebetween has been proposed.

However, the viscous damper is a mechanism in which the shear resistance increases as the area of the plate in contact with the viscous body increases, so it is necessary to increase the scale of the device itself in order to obtain an effective damping force. There is a difficulty to take.

The present invention has been made in view of the actual situation of the conventional viscous damper, and is intended to newly propose a damper having a structure that does not take up much space in equipment.

[Means for Solving the Problems]

In the present invention, the device is arranged horizontally between the upper and lower structures, or horizontally between the building equipment and the upper or lower structure, or vertically, and a hollow outer tube axially supported by one of them and The area occupied by the device is narrowed by adopting a double tube structure from the rod that is inserted into
Alternatively, the inner pipe that forms a part of the frame of the structure and the outer pipe that is wrapped around the inner pipe and that is connected to the braces that are installed in the frame surface, or the diagonal member that is installed in the frame surface are doubled. By constructing the device as a tube, it is incorporated into the frame, solving the problems of conventional construction.

In the former case, when installed between the upper and lower structures, the outer tube is rotatably supported by one of the structures at the center around a vertical axis,
Similarly, the rod is rotatably supported by the other structure at one end about the vertical axis, and the viscous fluid is filled between the outer peripheral surface of the rod and the inner peripheral surface of the outer tube.

When installed between the building equipment and the structure, the outer pipe and rod are pivotally supported around either the vertical axis or the horizontal axis.

The outer tube does not rotate during relative horizontal movement of the upper and lower structures in the rod axial direction, the rod reciprocates in the outer tube, and the outer tube rotates during relative horizontal movement in other directions, and at the same time the rod reciprocates. With this mechanism, the device exhibits damping performance in two horizontal directions.

When it is mounted on equipment, it exhibits damping performance against horizontal or vertical relative movement with the structure.

In the latter case, when it is installed in the frame, the outer pipe connected to the brace along the inner pipe that is a part of the frame reciprocates in the axial direction during horizontal deformation in the frame surface, forming a double pipe. Similarly, in the diagonal member, the inner and outer tubes relatively move in the axial direction, and the viscous fluid filled between the two tubes exhibits damping performance in the in-plane direction of the frame.

The device has a similar effect even when the viscous fluid is replaced with a viscoelastic body.

〔Example〕

 The present invention will be described below with reference to the drawings illustrating an embodiment.

First, the invention described in the first claim will be described.

As shown in FIG. 1, the vibration control device A of the present invention has an upper structure.
B ₁ and horizontally disposed between the lower structure B _2, a hollow outer tube 1 which is either rotatably supported about a vertical axis on one of the structure B _2, similarly to the other of the structure B ₁ It consists of a rod 2 that is rotatably supported around a vertical axis and a viscous fluid 3 that fills the space between them. Viscous damping performance with respect to relative displacement of both structures B ₁ and B _{2 in two} horizontal directions. Is to demonstrate.

Structure attaches to the outer tube 1 is shown a side, rotatably in a horizontal plane and standing shaft 4 is vertically erected on the undercarriage B ₂ In the illustrated embodiment the lower structure B ₂ as an axis Is pivotally supported.

Since the outer tube 1 can be freely rotated with respect to the lower structure B ₂ , the erecting shaft 4 has, for example, a lower end fixed to the lower structure B ₂ and an upper end pivotally supporting the outer tube 1 and at least one end thereof. It should be in a state of rotating with respect to.

The rod 2 is inserted into the outer tube 1 with a gap, and one end of the rod 2 extends vertically from the structure (upper structure) B ₁ facing the structure (lower structure) B ₂ axially supporting the outer tube 1. Hanging drooping shaft 5
Is rotatably supported by the upper structure B ₁ with respect to the lower structure B ₂ together with the outer tube.

As for the hanging shaft 5, at least one of the rod 2 side and the upper structure B ₁ side may rotate with respect to that side.

A gap between the outer peripheral surface of the rod 2 and the inner peripheral surface of the outer pipe 1 is filled with a viscous fluid 3 as shown in the figure, and the viscous fluid 3 is prevented from flowing out to both ends of the outer pipe 1 so that when the rod 2 reciprocates. A rubber seal 6 that returns this to its original position goes around the rod 2,
It is bonded to the rod 2 and the outer tube 1.

The seismic damping device A having the above-described structure is configured so that the rod 2 expands and contracts with respect to the outer tube 1 when the upper structure B ₁ and the lower structure B ₂ move relative to each other in the axial direction of the rod 2.
At the time of relative movement in the direction crossing the axis, as shown in FIG. 2, the outer tube 1 rotates about the upright axis 4 and, at the same time, the rod 2 expands and contracts to move the upper and lower structures B ₁ , B _{2 in two} horizontal directions. It is designed to exert a viscous damping effect on relative displacement.

The rod 2 is returned to its original position by the rubber seal 6 after the relative movement with respect to the outer tube 1.

The rod 2 may be a hollow member like the outer tube 1, and the damping effect can be enhanced by arranging a plurality of rods in parallel in the outer tube 1.

The invention according to the second aspect is one in which the viscous fluid 3 of the above invention is replaced with an appropriate amount of viscoelastic body 7 as shown in FIG. 3, and it has exactly the same function as the invention according to the first aspect.

The viscoelastic body 7 is adhered to the outer peripheral surface of the rod 2 and the inner peripheral surface of the outer tube 1 so that they can move relative to each other in the axial direction. In the present invention, the rubber seals 6 at both ends of the outer tube 1 are unnecessary.

The invention described in claim 3 is the same as the invention described in claim 1 or claim 2, except that the damping device A having the same structure is replaced between the upper and lower structures B ₁ and B ₂ and the building equipment and the upper or lower structure. Body B ₁ ,
The outer tube 1 and the rod 2 are rotatably supported around a vertical axis or a horizontal axis between B ₂ and installed to be used for damping of building equipment. It shows a mechanism similar to the invention.

Next, the invention described in claim 4 will be described.

As shown in FIGS. 4-1 to III, the vibration control device A of the present invention is a part of a frame F of a structure, that is, an inner pipe 8 which constitutes a beam or a column and an outer pipe 9 which is put around the inner pipe 8. It is composed of the viscous fluid 3 filled in between, and exhibits viscous damping performance against horizontal deformation in the plane of the frame F, that is, horizontal relative displacement of the upper and lower floors.

The inner pipe 8 may be a beam or a pillar as shown in FIG. 4, and the outer pipe 9 can be axially reciprocated along the inner pipe 8 around the middle portion of the inner pipe 8. A gap is provided between the outer peripheral surface and the outer peripheral surface as shown in FIG.

This gap is held by a spacer 10 as shown in FIG. 5-II, filled with a viscous fluid 3 as shown in FIG. 5, and a rubber seal 6 is provided at both ends of the outer pipe 9 and the inner pipe 8. To be glued.

As shown in the drawing, the outer tube 9 is also connected to a brace B which is erected in the frame F. With this brace B, the present vibration control device A is the same as the first aspect of the invention with respect to the deformation of the frame F. Will behave. This brace B does not resist external force.

FIG. 4-1 shows the case where the inner pipe 8 is a beam. In this embodiment, the frame F is horizontally deformed, and the inner pipe 8 is the lower inner pipe 8.
When the seismic damper A is displaced relative to the inner pipe 8, the brace B connected to the outer pipe 9 maintains the original state, and moves the outer pipe 9 in the opposite direction relative to the inner pipe 8. It exerts viscous resistance by moving.

Brace B on the displacement side of the beam when the inner pipe 8 of II is a pillar
Pushes down the outer pipe 9 connected to it against the pillar, and the brace B on the opposite side pushes up the outer pipe 9 on that side to dampen the displacement.

III is a combination of I and II.

After the relative movement of the inner pipe 8 and the outer pipe 9, the rubber seal 6 restores the original position.

In the invention described in claim 5, the viscous fluid 3 of the invention of claim 4 is replaced with an appropriate amount of viscoelastic body 7 as shown in FIG. 6, and the mechanism is the same as in the above invention.

Next, the invention described in claim 6 will be described.

In this invention, as shown in FIG. 7, a diagonal member erected in a frame F is constructed as a vibration control device A. One end is connected to the frame F and the other end is disconnected from the frame F. , The outer tube 12 whose other end is connected to the frame F
And viscous fluid 3 filled between
It follows the deformation of and reduces its displacement.

As shown in the drawing, the outer pipe 12 is connected to the frame F on the side of the inner pipe 11 on the side opposite to the inner pipe 11, and is disconnected from the frame F on the side to be connected. 11
A spacer 10 is provided between and to cover the space around it.

Further, as shown in FIG. 8, the rubber seals 6 are adhered to the inner and outer pipes 11 and 12 at the ends of the inner pipe 11 and the outer pipe 12, respectively, which is exactly the same as the fourth aspect of the invention.

When the frame F is deformed, the vibration control device A of the vibration control device A follows the displacement by expanding or contracting the inner pipe 11 with respect to the outer pipe 12 in accordance with the displacement amount, and exerts a damping force by the relative movement, thereby performing the relative movement. The rest is restored by the rubber seal 6.

The vibration control device A can also have a structure in which a plurality of inner pipes 11 are arranged inside the outer pipe 12 as shown in FIG.

In the invention described in claim 7, as shown in FIG. 10, the viscous fluid 3 of the invention of claim 5 is replaced by an appropriate amount of viscoelastic body 7, and the mechanism is exactly the same as the above invention.

The vibration damping device A according to the above fourth to seventh inventions independently forms a vibration damping structure, but by combining with a vibration damping device such as a laminated rubber bearing, a structure having high vibration damping and seismic isolation effects is realized. You can also do it.

〔The invention's effect〕

The present invention is as described above, and a viscous fluid or a viscoelastic body is filled between the outer tube and the rod inserted therein, or the inner tube, and the damping force is generated by the relative movement of the outer tube in the axial direction. Since the structure is effective, it is possible to follow a large displacement in a small installation space. Particularly, in the fourth to seventh inventions, it is difficult to secure the installation space because it is incorporated in the frame of the structure (steel tower etc.). Can be installed on.

Further, since the fourth to seventh inventions damp the vibration of the frame itself, the structure can have a high damping performance in the elastic region without adding a special device.

[Brief description of drawings]

FIGS. 1-I and II are an elevation view and a side view, respectively, showing an embodiment of the invention of the first claim, FIG. 2 is a plan view showing the behavior thereof, and FIG. 3 is the invention of the second claim. 4 is an elevational view showing an embodiment of the present invention, FIGS. 4-I, II, and III are elevational views showing an embodiment of the present invention, and FIG. 5-I is an enlarged sectional view of a part thereof. II
Is an axial sectional view, FIGS. 6-I and II are enlarged sectional views showing a part of the fifth invention, respectively, axial sectional views, and FIG. 7 is an embodiment of the sixth invention. Fig. 8 is an elevational view, Fig. 8 is an enlarged sectional view of a part thereof, Fig. 9 is an axial sectional view showing another embodiment, and Fig. 10 is a sectional view showing a part of the seventh invention. Is. A ...... Damping device 1 ...... outer tube 2 ...... rod, 3 ...... viscous fluid, 4 ...... upright axis, 5 ...... hanging shaft, 6 ...... rubber seal, B ₁ ...... superstructure, B ₂ ... Lower structure, 7 ... Viscoelastic body, F ... Frame, 8 ... Inner tube, 9 ... Outer tube, 10 ...
Spacer, B ... Brace, 11 ... Inner tube, 12 ... Outer tube.

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Claims (7)

[Claims] 1. A hollow outer tube horizontally disposed between upper and lower structures and having a central portion rotatably supported on one structure at one center, and one end inserted through the outer tube. A rod that is rotatably supported by the other structure around a vertical axis and that reciprocates in the axial direction in the outer tube when the upper and lower structural bodies move in two horizontal directions, and between the inner surface of the outer tube and the outer surface of the rod. A vibration control device consisting of a viscous fluid filled in. 2. The vibration control device according to claim 1, wherein a viscoelastic body is bonded and filled between the inner peripheral surface of the outer pipe and the outer peripheral surface of the rod instead of the viscous fluid. 3. An outer pipe and a rod are rotatably supported around a vertical axis or a horizontal axis between a building equipment and an upper or lower structure instead of the upper and lower structures. The vibration control device according to claim 1 or 2, wherein 4. An inner pipe forming a part of a frame of a structure, and a brace which is covered around an intermediate portion of the inner pipe and is erected in a frame surface are connected, and the inner pipe is horizontally deformed in the frame surface. An outer tube that reciprocates in the axial direction along the tube,
A vibration control device consisting of a viscous fluid filled between the outer peripheral surface of the inner pipe and the inner peripheral surface of the outer pipe. 5. The vibration damping device according to claim 4, wherein a viscoelastic body is adhered to and filled between the outer peripheral surface of the inner pipe and the inner peripheral surface of the outer pipe instead of the viscous fluid. 6. An inner pipe, one end of which is connected to the frame and the other end of which is erected in a state of being separated from the frame, in a frame surface of the structure, and the inner pipe is covered around the inner pipe and separated from the inner pipe. The outer pipe that is connected to the frame on the side that is connected to and disconnected from the frame that is connected and that reciprocates in the axial direction along the inner pipe when the frame surface is horizontally deformed, and the outer surface of the inner tube and the inner surface of the outer tube. A vibration control device consisting of a viscous fluid filled in. 7. The vibration damping device according to claim 6, wherein a viscoelastic body is adhered to and filled between the outer peripheral surface of the inner pipe and the inner peripheral surface of the outer pipe instead of the viscous fluid.