What is vibration control (seismic)?
● What is vibration control?
Vibration damping technology is used in various situations where vibration (shaking) is a problem in buildings and other structures. This technology is used in buildings and other structures where vibration (shaking) is a problem.
● How do you dampen vibration (shaking)?
By attaching what is called a “vibration control device” to the object, the shaking can be absorbed and made smaller.
● What is a vibration control device, for example?
The following is an example of a vibration control device used to reduce building sway during an earthquake.
Figure 1: Example of vibration-damping device
Example of vibration control (seismic) device (1)
Vibration control (seismic) damper... When you hear the word “vibration control (seismic),” you may think of a component in a building like the one in the photo below.
Figure 2 Vibration control (seismic) damper
These are called vibration control (seismic) braces vibration control (seismic) dampers, etc. The damper members expand and contract to absorb the shaking of the building during an earthquake.
When the product is intended for large shaking during an earthquake, it is often differentiated by the term “seismic damping”.
Example of vibration control (seismic) device (2)
Mass Damper・・・ There is another type of vibration control device called a mass damper. Mass damper is a device that absorbs vibration by making a weight attached to the object move in a way that prevents shaking.
It may be easier to understand if you imagine a swing. When you pedal, you put your weight in the direction to increase the swing, but when you want to stop the swing quickly, you put your weight in the opposite direction. It can be said that the human (weight) acts as a mass damper that dampens the swing quickly.
Figure 3: Mass Damper Image
Yacmo offers mass dampers (AMD, TMD) for earthquake protection.
Protecting Buildings from Earthquakes. ~100-ton class TMD case study~.
Figure 4: Mass damper for earthquake protection
Where is vibration control (seismic) used?
| In what place? What kind of shaking? | Causes of shaking | Problems due to shaking |
Lateral sway (horizontal vibration) of the entire building Example of Seismic Building Vibration Control Example of wind sway vibration control in an office Example of wind sway vibration control for a hotel | Earthquake Strong winds Traffic vibration | Building collapse/damage, internal furniture overturned, etc. Anxiety and discomfort due to shaking |
| Floor swaying (vertical vibration) in the building Offices, residences, factories, etc.  Examples of office vibration environment improvement (1) Examples of office vibration environment improvement (2) Examples of office vibration environment improvement (3) Examples of factory working environment improvements Examples of fitness and tatenori vibration countermeasures | Traffic vibration Walking vibration Fitness, etc. Equipment and Machinery | Decreased livability and workability due to discomfort Malfunction of precision instruments and other equipment due to vibration |
| Bridge structure (vertical oscillation) Stairs, pedestrian bridges, connecting corridors, crossing corridors, etc.  Example of staircase vibration environment improvement Example of Walking Vibration Control in Crossing Corridors | Walking vibration | Discomfort, difficulty walking in traffic |