JPH09268802A - Vibration damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a vibration damper and its peripheral member from being destroyed when the load on the damper is increased in an earthquake on large scale. SOLUTION: This vibration damper 1 is used by being interposed between two members 22, 23 which are relatively displaceable of a building to damp the oscillation of the building. A first damper 2 to damp the oscillation between two members 22, 23 is connected in series to a second damper 3 to shut off the load to the first tamper 2 when the load on the first damper 2 from two members 22, 23 exceed the prescribed value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damper used for damping the vibration of a building.

[0002]

2. Description of the Related Art Various types of vibration dampers, such as oil dampers, viscous dampers, steel dampers and friction dampers, have been put into practical use as vibration dampers provided in buildings for absorbing vibration energy during an earthquake.

These damping dampers are used by being fixed between two members which are relatively displaced during a building earthquake, as shown in FIG. 6, for example.

In FIG. 6, one end of the oil damper 2 is fixed to the lower surface side of the beam 11 of the building 10 via the fixing member 12, and the other end is fixed to the upper surface side of the beam 11 via the fixing member 13. This is an example of the case. In this way, 2 which can be displaced
When the building 10 having the oil damper 2 interposed between members vibrates due to seismic force or wind force, the oil damper 2 receives a horizontal load due to the relative displacement between the fixed member 12 and the fixed member 13. When this horizontal load is applied, the oil damper 2 absorbs the vibration energy by the resistance associated with the oil flow.

[0005]

In the conventional damping damper described above, the energy absorbed by the oil damper 2 when the vibration occurs due to seismic force, wind force, etc., is the restoring force characteristic curve shown in FIG. It corresponds to the area surrounded by A.

By the way, when the load applied to the oil damper 2 becomes large due to a large-scale earthquake, the energy absorbed by the oil damper 2 is surrounded by the restoring force characteristic curve B as shown in FIG. It will be equivalent to the area that has been increased and will increase. As a result, the fixing member 1
There is a problem that the load applied to the tires 2 and 13 becomes excessively large beyond the breaking limit, and the oil damper 2, the fixing members 12 and 13, and the peripheral members such as the beam 11 are broken.

The present invention has been made in order to solve the above-mentioned problems, and has a vibration damping damper which is excellent in shutting off an excessive load, has high safety, and can suppress costs such as repair and replacement. For the purpose of provision.

[0008]

A vibration damper according to claim 1, wherein the vibration damper is interposed between two members of a relative displacement of the building for damping the vibration of the building. A first damper for damping the vibration between the two members, and the first damper from between the two members.
When the load applied to the damper of exceeds a certain value,
It is characterized in that the load is connected in series with a second damper that blocks transmission of the load to the first damper. In this damping damper, when the first damper receives a certain load or more, the second damper blocks the load transmitted to the first damper, so that the first damper and the like are prevented from being destroyed. To be done.

The vibration damper according to claim 2 is the first damper.
The damper of claim 3 is an oil damper, the damping damper of claim 3 is the friction damper of the second damper, the damping damper of claim 4 is the steel damper of the second damper, and The damping damper described is the first
The damper is a viscous damper or a viscoelastic damper.

In these vibration dampers, the oil damper, the viscous damper, or the viscoelastic damper serves as the first damper for damping the vibration when the building in which the vibration damper is interposed vibrates. Then, in these vibration dampers, when a load of a certain amount or more is applied, the steel damper or the friction damper blocks the load transmitted to the first damper as the second damper. Etc. is prevented from being destroyed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing an embodiment of the present invention, in which reference numeral 1 is a vibration damper. The vibration damper 1 has a configuration in which an oil damper 2 (first damper) and a friction damper 3 (second damper) are connected in series. The vibration damper 1 is provided between the upper member 22 and the lower member 23 to be damped, and the oil damper 2
Is connected to the upper member 22, and the friction damper 3 is connected to the lower member 23.

Here, the oil damper 2 is assumed to have a restoring force characteristic represented by a restoring force characteristic curve A shown in FIG. The friction damper 3 has a threshold value S such that the load at the static friction limit at which the friction damper 3 starts to slide when a load is applied, as shown in FIG.
The threshold value S is set so as not to exceed the breaking limit force of the oil damper 2 and the breaking limit force of the upper member 22 and the lower member 23 to which the vibration damper 1 is connected.

In the vibration damper 1 having the above structure, when the upper member 22 and the lower member 23 are displaced by an external force such as an earthquake or wind, vibration is transmitted to the vibration damper 1 and a load is applied. At this time, since the oil damper 2 and the friction damper 3 are connected in series,
Equal load is applied.

Here, when the magnitude of the load applied to the vibration damper 1 does not reach the threshold value S, the oil damper 2 corresponds to the area surrounded by the restoring force characteristic curve A as shown in FIG. It absorbs the vibration energy that occurs and releases it as heat energy due to the viscous resistance of oil.

However, when the magnitude of the load applied to the vibration damper 1 exceeds the threshold value S, the oil damper 2 is represented by the restoring force characteristic curve C as shown in FIG. It shows the restoring force characteristics. Then, since the load applied to the friction damper 3 exceeds the static friction limit,
The friction damper 3 slides out and absorbs energy corresponding to the area of the portion ΔS. As a result, the load acting on the oil damper 2, the upper member 22, and the lower member 23 becomes equal to or less than the threshold value S, and does not exceed the threshold value S.

According to the vibration damper 1 having the above-mentioned structure, the load acting on the oil damper 2, the upper member 22 and the lower member does not exceed the threshold value S, and therefore exceeds the breaking limit force thereof. It is possible to suppress the application of a heavy load.
Therefore, the vibration damper 1, the upper member 22, and the lower member 23 are prevented from being destroyed, and the safety of the entire building is improved. As a result, the damped damping damper,
Further, since it is not necessary to repair or replace the peripheral members, it is possible to suppress the cost for the repair or replacement. Further, by setting the threshold value S of the friction damper 3 arbitrarily, it is possible to obtain a sufficient vibration damping effect while ensuring safety not to damage.

The damping damper 1 may be installed anywhere between two displaceable members, and FIG.
3 is an example of installation in the middle of the brace 14 installed on the diagonal of the rectangle formed by the beams 11 and 11 and the pillars 15 and 15. FIG. This is an example installed in between.

The threshold value S is set (second
The damper) is not limited to the friction damper, and a steel material damper may be used as shown in FIGS. 4 and 5. In FIG. 4, the oil damper 2 includes a beam 11 of a building 10 through a steel damper 4 having one end fixed to a fixing member 12.
Is fixed to the upper side of the
It is fixed to the lower side of the beam 11 via 4. Further, in FIG. 5, the oil damper 1 has one end fixed to the upper side of the beam 11 of the building 10 via the fixing member 12 and the other end to the beam via the plate-shaped steel damper 5. It is fixed to the lower one of 11. Figures 4 and 5
Also in the example in (1), it is possible to obtain the above-described effects by arbitrarily setting the yield limit of the steel dampers 4, 5.

Instead of the oil damper 1, a viscous damper or a viscoelastic damper may be used.

[0020]

According to the damping damper of the present invention, the load applied to the first damper can be suppressed from exceeding a certain value by the second damper, so that the damping damper and surrounding buildings can be prevented. Since the fixed portion and the like are not destroyed, there is an effect that the safety is high and the cost of repair and replacement can be suppressed.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a vibration damper for explaining an embodiment of the present invention.

FIG. 2 is a schematic view showing an example in which the vibration damper of the present invention is incorporated in a brace.

FIG. 3 is a schematic view showing an example in which vibrations of adjacent buildings are attenuated by the vibration damper of the present invention.

FIG. 4 is a schematic view showing another example in which the vibration damper of the present invention is incorporated in a brace.

FIG. 5 is a schematic view showing another example in which the vibration damper of the present invention is installed.

FIG. 6 is a schematic view showing a conventional vibration damper.

FIG. 7 is a diagram showing a restoring force characteristic curve of a vibration damper.

FIG. 8 is a diagram showing a restoring force characteristic curve of a vibration damper.

FIG. 9 is a diagram showing a restoring force characteristic curve of a vibration damper.

[Explanation of symbols]

 1 ... Vibration damper 2 ... Oil damper (first damper) 3 ... Friction damper (second damper) 22 ... Upper member (2 members) 23 ... Lower member (2 members)

Claims (5)

[Claims] 1. A vibration damping damper, which is used between two members capable of relative displacement of a building for damping the vibration of the building, for damping the vibration between the two members. The first damper and the first member from between the two members.
When the load applied to the damper of exceeds a certain value,
A damping damper, characterized in that it is connected in series with a second damper that blocks transmission of the load to the first damper. 2. The vibration damper according to claim 1,
The vibration damping damper, wherein the first damper is an oil damper. 3. The vibration damper according to claim 1, wherein
The vibration damper, wherein the second damper is a friction damper. 4. The vibration damper according to claim 1,
The vibration damper, wherein the second damper is a steel damper. 5. The vibration damper according to claim 1,
The vibration damping damper, wherein the first damper is a viscous damper or a viscoelastic damper.