JPH0725412Y2 - Wall structure incorporating a vibration damping device - Google Patents

Description

[Detailed Description of Device] a. OBJECT OF THE INVENTION [Industrial field of application] The present invention relates to a building structure against strong forced vibration force such as earthquake motion, and more particularly to a wall structure incorporating a vibration damping device.

[Conventional technology]

When a building or other building structure vibrates due to a forced vibration force such as an earthquake and causes deformation, the deformation is roughly classified into shear deformation in which each floor moves horizontally and bending deformation in which each floor moves with inclination. To be done. The shearing and bending deformations that occur in the building structure due to the earthquake or the like spread to the wall that blocks the space portion defined by the columns and beams of each floor, and damage the wall.

In view of the above-mentioned point, conventionally, a wall structure in which a vibration damping device utilizing the viscous shear resistance of a highly viscous substance is incorporated in the space defined by the columns and beams of each layer (Japanese Patent Publication No. 54-28).
No. 226), or a wall structure in which the wall itself is configured to generate viscous shear resistance of a highly viscous substance (JP-A-61-87068).
No.), and a wall structure incorporating a hydraulic damper (piston-orifice type) between the column and the wall.

However, the above-mentioned conventional technique using the former viscous shear resistance force has a performance advantage that not only a large resistance force can be obtained but also it reacts extremely sensitively to a minute displacement. Since all of them use high-viscosity substances, there is a problem of leakage of the viscous substances, so-called sealing means need special consideration, and the resistance plates that cause a great influence on the generation of viscous shear resistance force. There is a problem in manufacturing that flatness, parallelism, and maintenance of minute gaps between resistance plates are difficult, and it is difficult to manufacture them with high precision. This manufacturing difficulty increases as the size of the device or the wall itself increases.

Further, while the latter conventional technology using the hydraulic damper has an advantage that a large capacity one can be manufactured relatively easily, on the other hand, the sealing material is constantly subjected to internal stress, and the sealing material is easily damaged. There is a problem.

[Problems to be solved by the invention]

In view of the above points, the present invention aims to obtain a wall structure incorporating a vibration damping device by using a vibration damping device which is easy to manufacture and has a large vibration damping function with a relatively small structure. is there.

B. Configuration of the Invention [Means for Solving Problems] The present invention employs the following technical means (configuration) in order to achieve the above-mentioned object. That is, a wall body that blocks the space portion is arranged in a space portion defined by columns and beams that form the frame of the building structure, and the wall body faces the beam at its upper edge portion. A notch recess is formed, and the notch recess has a casing having a substantially hollow cylindrical working chamber inside; a female screw hole on the inner surface and at least one resistance blade on the outer surface A rotary shaft body that is rotatably supported by the casing with the resistance vanes positioned in the working chamber; a metal plastic such as lead closely packed in the working chamber with an inner wall of the working chamber and a rotation stopping means. A vibration damping device made of a material and is fixedly arranged on the beam facing the notch recess, and the vibration damping device is provided at both ends of the notch recess of the wall body in the female screw hole of the rotary shaft. Characterized by a fixed screw rod screwed together To.

[Action]

Large shear deformation and bending deformation occur in a building structure such as a building due to an earthquake or the like, and due to the deformation, an excellent relative displacement of periodic shear deformation occurs between the beam and the wall body of each floor.

Along with this, the screw rods whose ends are fixed between the side surfaces of the cutout recesses of the wall body are horizontally displaced.

Due to the horizontal displacement of the tension member, the rotational force is periodically transmitted to the rotary shaft body that is screwed into the screw rod and interlocks with the screw rod.

When the rotating shaft is about to rotate cyclically, the metal-plastic material densely filled in the working chamber of the casing with the inner wall of the working chamber and the rotation stopping means is located in the working chamber of the casing. The resistance blade causes plastic deformation in the vicinity of the resistance blade.

Energy is consumed when the metallic plastic material is plastically deformed, and the rotational movement of the rotary shaft body is attenuated. Since the energy consumption associated with the plastic deformation of the metallic plastic material is extremely large, this periodic rotational movement is quickly damped, and as a result, the relative displacement between the beam and the wall is prevented. Since the relative displacement between the beam and the wall body is prevented, in other words, the seismic energy that causes the relative displacement between the beam and the wall body is absorbed, the damage of the wall body is prevented.

〔Example〕

An embodiment of a wall structure incorporating the vibration damping device of the present invention will be described with reference to the drawings.

1 to 3 show an embodiment thereof. That is, the first
The figure shows the entire wall structure, and FIGS. 2 and 3 show the detailed structure of each part.

Referring to FIG. 1 and FIG. 2, 1 and 2 are columns and beams that form the frame of a building structure, and a wall body 4 is closed in a space 3 defined by the columns 1 and 2. Installed. The wall 4
Is fixedly installed by, for example, groove fitting means or the like so that relative displacement is allowed with respect to the pillar 1 and the beam 2.

The wall 4 has a predetermined thickness, and a rectangular notch recess 5 is provided at the upper edge of the wall 4, and the side face 5a of the notch recess 5 has a narrow width in a direction orthogonal to the side face 5a. Recessed grooves 6 are formed respectively. The groove 6 opens upward.

A mounting plate 8 having a through hole 8a on the side surface of the cutout recess 5
However, the through hole 8a is fixed to the groove 6 so as to communicate therewith. Further, a nut member having a female screw hole 10 facing the through hole 8a.
11 is fixed.

Then, the screw rod 12 is attached to the attachment plate 8. That is, the screw rod 12 is screwed into the female screw 10 of the nut member 11, and both ends thereof are projected in the concave groove 6 to be fixed.

In this way, the screw rod 12 is horizontally fixed to the wall body 4 in the horizontal direction.

The vibration damping device S is fixed to the lower surface of the beam 2 via the mounting member 14 so as to face the notched concave portion 5 of the wall body 4 in association with the screw rod 12.

2 and 3 show an exemplary embodiment of the vibration damping device S.

That is, this vibration damping device S has a cylindrical casing 17 having a substantially hollow cylindrical working chamber 16 therein, and a resistance vane 18 on the outer surface thereof.
It includes a rotary shaft body 19 that is positioned in the casing 16 and is rotatably supported at a central axis position in the casing 17, and lead P that is densely filled in the working chamber 16. Then, the rotary shaft body 19 is screwed into the threaded rod 12 by means of the female threaded portion 19a on the inner surface thereof, so that the vibration damping device S and the threaded rod 12 are interlocked.

More specifically, the casing 17 includes a divided body 17A in which a pot-shaped concave portion 21 having a substantially cylindrical shape is formed inside, and a lid-shaped divided body provided so as to face the concave portion 21 of the divided body 17A. 17B
And appropriate fixing means (eg welding, bolts, etc.)
The two divided bodies 17A and 17B are integrally assembled with each other.
A circular hole 22 is formed in the center of each of the split bodies 17A and 17B, and the rotary shaft body 19 is rotatably supported in the circular hole 22 via a bearing 23.

The working chamber 16 is a sealed space, and a protrusion 25 as a rotation stopping means is formed on the circumferential side wall surface thereof, in other words, on the side wall surface of the pan-shaped recess 21.

In the present embodiment, the protrusions 25 are provided at two locations facing the side wall of the working chamber 16, but they may be provided at one location or at three or more locations at equal intervals. Also, the protrusion 25
Instead of this, a wavy uneven portion may be used. Further, when the working chamber 16, in other words, the pot-shaped recess 21 has a quadrangular shape (or a polygonal shape), no special rotation stopping means is required.

In the working chamber 16, the resistance blades 18 are provided on the outer peripheral surface of the rotary shaft body 19 so as to project toward the mutually opposing sides. The width of the resistance vane 18 substantially matches the width of the working chamber 16 and does not form a gap.

Also, the top portion 18a of the resistance wing 18 has a rounded shape,
Moreover, the side surface portion 18b is also formed into a gently curved surface. The top portion 18a and the inner wall of the working chamber 16 are kept at a distance that does not change the plastic deformation characteristics of lead described later.

Lead P as an energy absorber is filled in the working chamber 16 in which the resistance blade 18 is incorporated. The lead P is cast in the working chamber 16 in a molten state (melting point 327.5 ° C.). In the assembling process of the apparatus S, this pouring is performed by pouring molten metal from a sprue (not shown) formed in the casing 17 in a state where the casing 17 is assembled, and then a blind lid (not shown) is provided at the inlet. To be fitted. The lead P to be used includes, in addition to pure lead, a lead alloy or a mixture with lead and other substances.

The attachment portion 14 attaches the vibration damping device S to the beam 2. That is, the mounting portion 14 rigidly grips the casing 17 and is fixed to the lower surface of the beam 2 via the flange 14a thereof.

In this attachment, the casing of this vibration damping device S
The plate surface 17a of 17 is arranged parallel to the side surface 5a of the cutout recess 5 of the wall body 4.

More specifically, the vibration damping device S is arranged in the cutout recess 5 with an extra space. Further, the wall structure is arranged in a building structure not only in one direction but also in multiple directions, but it is important that the wall structure is arranged in order to suppress an excellent vibration displacement.

The wall structure incorporating the vibration damping device of this embodiment having the above-described structure operates in the following manner against earthquake motion.

When a periodic forced vibration due to a seismic motion acts on a structure, the vibration is transmitted to the pillar 1 and the beam 2, but the wall body 4 is displaceably insulated from these, and the wall body 4 itself. Is regarded as a rigid body in the direction along the wall surface, so that an excellent relative displacement of shear deformation occurs between the beam 2 and the wall body 4.

Along with this, the screw rods 12 whose ends are respectively fixed to the mounting plate 8 on the side surface of the cutout recess 5 of the wall body 4 are horizontally displaced. Due to the horizontal displacement of the screw rod 12, a rotational force is applied to the rotary shaft body 19 that is screwed into the screw rod 12 and is rotatably supported by the casing 17 that constitutes the vibration damping device S fixed to the beam 2. To be A frictional force is generated in the winding portion between the tension member 13 and the rotary shaft body 19, and the rotary shaft body 19 is rotated periodically by the frictional force.

Due to the rotation of the rotary shaft body 19, the resistance vanes 18 of the rotary shaft body 19 in the working chamber 16 of the casing 17 push the filled lead P by the gentle side curved surface to plastically deform the lead P and periodically. It is rotationally displaced. Energy is consumed by the plastic deformation of the lead P, and the movement of the rotary shaft body 19 is attenuated.

In this movement, the lead P is prevented from being rotated by the rotation stopping means 25, and the movement of the resistance blade 18 is effectively used for the plastic deformation of the lead P.

The above displacements are periodic and therefore the rotary shaft 19
Movement becomes periodic, and the energy consumption associated with the plastic deformation of lead is extremely large, this periodic rotational movement is rapidly attenuated, and eventually shear deformation between the beam 2 and the wall body 4 The relative displacement due to is rapidly attenuated.

In the present embodiment, a vibration damping device is provided between the upper end of the wall body of each floor and the beam where shear deformation is predominant in the high-rise building structure, and this deformation is directly performed through the screw rod. , Transmitted to the vibration damping device. Therefore, the majority of the deformation energy is absorbed by the vibration damping device S, and the energy loss in the deformation transmission path is minimal. Therefore, there is an advantage that energy absorption, that is, vibration damping, is made extremely sensitive.

Further, since the vibration damping device S incorporated in the present wall structure consumes energy associated with the plastic fluidization of lead, it is possible to obtain a large energy absorption capacity, and the size thereof is reduced accordingly, and it can be compactly incorporated into the wall body. .

The present invention is not limited to the above embodiment, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included in the technical scope of the present invention.

(A) In this embodiment, an example of the vibration damping device S is shown, but it is not possible to prevent the application of another vibration damping device using a lead body and having the same function. For example, in the vibration damping device S of this embodiment, the resistance blades 18 are stretched on both sides, but they may be stretched on one side or radially. Further, the resistance blade 18 may be made sufficiently smaller than the width of the working chamber 16.

(B) In this embodiment, the threaded rod 12 is attached to the mounting plate 8 fixed to the side surface of the cutout recess 5 of the wall body 4 through the groove 6, but the threaded rod 12 is directly attached. Mounting plate 8
The groove 6 is unnecessary if it is welded to, and the mounting plate 8 and the groove 6 are not necessary if the screw rod 12 is embedded and fixed in the wall body 4.

(C) As an energy absorber, in addition to lead, metals such as tin, zinc, aluminum, sodium, and copper;
Superplastic alloys such as tin alloys, zinc-aluminum-copper are used. Furthermore, when lead, or the substances mentioned above and are selected, a combination of two or more of these substances is also possible.

When the above substances and are used as the energy absorber, these substances are attenuated by the energy absorption accompanying the plastic fluidization, like the lead body.

C. Effects of the Invention A wall structure incorporating the vibration damping device of the present invention has the following unique effects.

Since the vibration energy generated in the building structure is absorbed by the energy consumption associated with the plastic fluidization of the lead body, a large damping force can be obtained and the vibration damping device itself that consumes the energy. The structure is simple and the wall structure is easy to manufacture.

In combination with the above, the vibration damping device can be downsized and can be compactly incorporated into the wall body.

The predominant relative displacement between the building structure and the frame wall is transmitted to the vibration damping device via the threaded rod with as little energy loss as possible, so that the vibration energy is efficiently absorbed.

A desired resistance force can be easily obtained by appropriately changing the number and size of the resistance blades that cause plastic deformation of lead closely packed in the hollow portion of the casing.

[Brief description of drawings]

FIG. 1 is a partially sectional front view showing a wall structure incorporating the vibration damping device of the present invention, FIG. 2 is an enlarged sectional view of a main part of FIG. 1, and FIG. 3 is a line I-I of FIG. FIG. DESCRIPTION OF SYMBOLS 1 ... Pillar, 2 ... Beam, 3 ... Space part, 4 ... Wall body, 5 ... Notch recessed part, 5a ... Side surface, 6 ... Recessed groove, 8 ... Mounting plate, 12 ... Screw rod,
16 ... Working chamber, 17 ... Casing, 18 ... Resistance blade, 19 ... Rotating shaft body, 19a ... Female screw hole, 25 ... Rotation stopping means, P ... Lead, S ... Vibration damping device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Ikuo Shimoda, 8 Kirihara-cho, Fujisawa-shi, Kanagawa, Oiles Industry Co., Ltd. 56) References Japanese Patent Laid-Open No. 62-197574 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A wall body for blocking the space portion is arranged in a space portion defined by columns and beams forming a frame of a building structure, and the beam body has an upper edge portion with the beam. And a casing having a substantially hollow cylindrical working chamber therein; and a female screw hole on the inner surface and at least one resistor on the outer surface. A rotating shaft body having blades and rotatably supported by the casing with the resistance blades located in the working chamber; and a metal plastic body closely packed in the working chamber with an inner wall of the working chamber and a rotation stopping means. Substance and;
A vibration damping device comprising the casing fixed to the beam facing the cutout recess, and fixed to both ends of the cutout recess of the wall in the female screw hole of the rotary shaft. A wall structure incorporating a vibration damping device, characterized in that a threaded rod is screwed together.