JPH0739764B2 - Damping addition device for vibration control structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is to connect a frame main body of a structure and a variable rigidity element or variable rigidity elements provided in a frame groove, and change the connection state. , It relates to a device for protecting a structure from vibration disturbance, and has a damping effect by viscous fluid in addition to the lock / unlock function.

[Conventional technology]

The applicant has incorporated the variable rigidity element in the form of brace or wall in the column beam structure of the structure, and the rigidity of the variable rigidity element itself,
Alternatively, the connection state between the frame body and the variable rigidity element is made variable, the characteristics of the vibration external force are analyzed by a computer against the vibration external force such as earthquake and wind, and the rigidity of the structure is changed so that it does not resonate. Various active vibration control systems and variable rigidity structures have been proposed for safety of objects (for example, JP-A-62-268479, JP-A-63-114770, JP-A-63-63).
No. 114771).

[Problems to be Solved by the Invention]

By the way, the conventional active seismic control system mainly focuses on the relationship between the predominant period such as seismic motion and the natural frequency of the structure (usually the first natural frequency is often a problem). By actively shifting the natural frequency of the structure with respect to the cycle, the resonance phenomenon is avoided and the response amount is reduced.

However, especially in the case of earthquake motion, etc., since it is an unsteady vibration, there may be a case where a sufficient effect cannot always be obtained, for example, when the prominent period is not clear or when there are a plurality of prominent periods.

The device of the present invention locks the frame main body and the variable stiffness element or when the variable stiffness element is interposed between them.
In addition to the vibration control function in terms of non-resonance due to unlocking, by adding a large damping property, the response amount of the structure is reduced, the safety of the structure is secured, and a comfortable living space is realized. The purpose is to do.

[Means for Solving the Problems]

Hereinafter, the attenuation adding device of the present invention will be described with reference to the reference numerals corresponding to the embodiments.

The damping addition device of the present invention is a hydraulic cylinder type device in which a viscous fluid is sealed in place of the hydraulic oil, and the device body has a double rod type piston 3 that reciprocates in a cylinder 2 as shown in FIG. A hydraulic chamber 5 (actually, not oil, but a viscous fluid is enclosed) is provided on the left and right of the, and the viscous fluid in the left and right hydraulic chambers 5 is closed or flowed by the large flow switching valve 10. Thus, the piston 3 is fixed or movable left and right.

One of the cylinder 2 and the rod 4 is connected to the frame body of the structure and one of the variable rigidity elements or the variable rigidity elements, and the other is connected to the frame body and the other of the variable rigidity elements or the variable rigidity elements. It

The left and right hydraulic chambers 5 are respectively provided with an outflow blocking check valve 6 for blocking the outflow of the viscous fluid from the hydraulic chamber 5 and an inflow blocking check valve 7 for blocking the inflow of the viscous fluid into the hydraulic chamber 5. An inflow passage 8 that connects the left and right outflow prevention check valves 6 and an outflow passage 9 that connects the left and right inflow prevention check valves 7 are provided along the main body of the cylinder 2.

A large flow rate switching valve 10 is provided at a connection position of the inflow passage 8 and the outflow passage 9. Large flow switching valve 10
Is, for example, an inlet port 12 and an outlet port 13 on one end side of the valve body.
And a back pressure port 14 on the other end side, and a shut-off valve that prevents the outflow of the viscous fluid to the back pressure port 14 side in the flow path that connects the inlet port 12 and the back pressure port 14. 11
By providing a large volume of viscous fluid at high speed,
Also, it can be cut off instantly.

The viscous fluid may be, for example, added turbine oil, glycerin, or the like.

[Action]

The damping addition device of the present invention is a double rod cylinder type, and is provided with two flow paths, an inflow flow path 8 and an outflow flow path 9, along the cylinder 2, check valves 6 and 7, and a large flow switching valve 10. As a result, the passage length can be shortened, the passage area can be made large, and the passage resistance can be reduced, so that a large flow rate of the viscous fluid can be passed at a high speed and can be interrupted instantaneously. Also,
By using the back pressure type large flow rate switching valve 10, the valve can be opened and closed instantly, and the response speed can be extremely increased in combination with the above structure.

Next, the operating state of the damping addition device 1 according to the present invention will be described.

(1) Opening of large flow rate switching valve When the shut-off valve 11 is in the open state, the viscous fluid in the left hydraulic chamber 5 is moved by the piston 3 in the left direction in FIG. The large flow rate switching valve 10 is pushed up through the flow path 9.

Since the left outflow prevention check valve 6 and the right inflow prevention check valve 7 are closed by the viscous fluid under pressure, the inflow passage 8 and the right outflow prevention check valve 6
The viscous fluid from the large flow rate switching valve 10 flows therethrough.
As a result, the viscous fluid flows from the left hydraulic chamber 5 to the right hydraulic chamber 5, and the piston 3 moves leftward due to an external force.

Even when the piston 3 moves to the right, it operates symmetrically, and the piston 3 moves to the left due to an external force.

(2) Large flow rate switching valve closed When the shut-off valve 11 is closed and an external force is applied to the piston 3 in the left direction, the pressure of the viscous fluid up to the large flow rate switching valve 10 rises, and the large flow rate switching valve 10 Try to push up,
Since the shutoff valve 11 receives the pressure of the viscous fluid at the back pressure port 14, the large flow rate switching valve 10 is also fixed in the closed state, and the movement of the piston 3 is blocked.

The same applies when an external force in the right direction is applied to the piston 3.

When the damping addition device 1 using the above viscous fluid is installed between the frame body and the variable stiffness element, in addition to the non-resonance effect due to the change in the frame stiffness according to the lock / unlock described above, the viscous fluid itself Since a large damping effect due to the viscosity is obtained and the Reynolds number of the viscous fluid is small, the damping force with respect to the frame body is given as a resistance force (P = cv) which is almost proportional to the relative speed between the resinder 2 and the piston 3.

〔Example〕

 Hereinafter, the present invention will be described based on an illustrated embodiment.

FIG. 1 shows a concrete structure of the damping addition device 1 of the present invention. The main body of the device 1 is a double rod type piston 3 in a cylinder 2 so that the piston rods 4 project from both ends. It is slidably inserted. Piston 3
In the hydraulic chambers 5 formed on the left and right sides of the hydraulic chamber 5, the outflow prevention check valves 6 that prevent outflow of the viscous fluid in the hydraulic chambers 5
A check valve 7 for preventing inflow of viscous fluid to the hydraulic chamber 5 is provided.

The check valves 6 and 7 have a structure in which, for example, a ring-shaped valve element is biased by a spring, and a viscous fluid under pressure is caused to flow only in one direction. By providing an inflow passage 8 for connection and an outflow passage 9 for connecting the left and right inflow prevention check valves 7 and connecting these through a large flow switching valve 10, the left and right hydraulic chambers 5 are connected. It is in communication.

In this embodiment, an inlet port 12, an outlet port 13 and a back pressure port 14 are formed on one end side of the large flow rate switching valve 10, and a back pressure port 14 is formed on the other side of the bypass port 14 toward the inlet port 12. A shut-off valve 11 is provided in the. This shut-off valve 11 uses a solenoid 15 to open and close 2
It can be switched by position.

Further, as shown in the drawing, the inflow passage 8 is provided in the cylinder 2.
The accumulator 16 communicating with is attached.

2 to 9 show examples of application positions of the damping addition device 1 to a structure frame.

In the example of FIG. 2, the damping addition device 1 is provided between the column-beam frame as the frame body 31 and the inverted V-shaped brace 35 as the variable rigidity element.
Is intervening.

The example in Fig. 3 shows a column beam frame as the frame body 31 and upper and lower beams.
This is a case where the damping addition device 1 is interposed between the frames 41 that are erected or hung from the frame 34 to form a moment resistance frame as a variable rigidity element.

In the example of FIG. 4, the damping addition device 1 is interposed between the column beam frame as the frame body 31 and the RC seismic wall 42 as the variable rigidity element.

The example of FIG. 5 is an example of the case where the damping addition device 1 is provided in combination with a seismic isolation rubber 43 such as laminated rubber at the base of the seismic isolation structure. Play a role. The variable stiffness element in this case can be considered the basis of the structure.

In the example of FIG. 6, the X-type brace 44 provided in the column beam frame as the frame body 31 is used as a variable rigidity element, and the damping addition device 1 is laterally (horizontally) interposed in the center of the X-type.

Similar to the example of FIG. 6, the example of FIG. 7 is an example applied to the X-type brace 45. In contrast to the example of FIG. 6 in which the damping addition device 1 is provided laterally, in the present example It is installed vertically and is vertical.

The example of FIG. 8 is similar to the example of FIG. 4 in that the damping addition device 1 is interposed between the column beam frame as the frame body 31 and the RC seismic wall 46 as the variable rigidity element. The feature is that the attenuation adding device 1 is provided above the opening 47 such as the entrance and exit.

In the example of FIG. 9, the damping addition device 1 is interposed in the center of the X-type brace 48 in the large frame, and the middle girder 49 and the brace 48 are separated.

〔The invention's effect〕

As described above, the variable-rigidity device according to the present invention is a double rod cylinder type, which is provided with two viscous fluid flow paths, a check valve, a large flow switching valve in the cylinder, and a back pressure type large flow switching valve. Since the flow path is opened and closed, a large flow rate of viscous fluid can be made to flow efficiently and the response can be instantly turned on.
You can go off.

When applied to a variable-rigidity structure, the rigidity of the structure can be changed by turning on / off the variable-rigidity device, that is, switching lock / unlock as a coupling device, against disturbances such as earthquake motion that are input to the structure. In addition to providing a vibration control effect due to non-resonance, a damping effect due to the viscosity of viscous fluid is applied to the structure frame, reducing the response amount of the structure, ensuring safety and realizing a comfortable living space can do.

[Brief description of drawings]

FIG. 1 is a hydraulic circuit diagram showing a basic structure in an embodiment of the damping addition device of the present invention, and FIGS. 2 to 9 are schematic diagrams showing examples of application positions of the damping addition device of the present invention to a structural frame. Is. 1 ... damping addition device, 2 ... cylinder, 3 ... piston, 4 ... rod, 5 ... hydraulic chamber, 6 ... outflow prevention check valve, 7 ... inflow prevention check valve, 8 ... inflow Flow channel, 9 ... Outflow channel, 10 ... Large flow rate switching valve, 11 ...
… Shut-off valve, 12… Inlet port, 13… Outlet port, 14… Back pressure port, 15… Solenoid, 16… Accumulator

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshinori Adachi 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Motoichi Takahashi 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 Kashima Construction Co., Ltd.

Claims (2)

[Claims] 1. A cylinder connected to a frame body of a structure and one of variable stiffness elements or variable stiffness elements; and a cylinder connected to the other of the frame body and variable stiffness elements or variable stiffness elements, in the cylinder. Reciprocating double rod type pistons, hydraulic chambers provided on both sides of the pistons, a pair of outflow prevention check valves for preventing fluid from flowing out of the hydraulic chambers, and a fluid flow to the hydraulic chambers. A pair of inflow blocking check valves for blocking inflow, an inflow channel connecting the both outflow blocking check valves, an outflow channel connecting the both inflow blocking check valves, and the inflow channel And a large flow rate switching valve provided at the connection position of the outflow passage, and a viscous fluid is sealed in place of the hydraulic oil of the hydraulic device, and a damping addition for a vibration control structure is provided. apparatus. 2. The large flow rate switching valve has an inlet port and an outlet port on one end side of a valve body and a back pressure port on the other end side, and is a flow connecting the inlet port and the back pressure port. The damping addition device for a vibration control structure according to claim 1, further comprising a shut-off valve for preventing the viscous fluid from flowing out to the back pressure port side.