Originally published on Feb 29, 2024
A wall-type friction damper that achieves low cost and excellent durability through a simple structure.
Features
No need to worry about fatigue life; it is highly durable for repeated use and requires no replacement.
It can effectively dampen vibrations from minor swaying to major earthquakes.
The difference between static and dynamic friction is minimal, utilizing friction materials that do not produce friction noise or vibration (stick-slip).
Structure and Operation
Structure
The WFD is a damping device that utilizes the friction resistance of friction materials. Oil-free friction materials and corresponding materials (stainless steel) are installed between the upper fixed plate and the lower movable plate. By clamping these materials with prestressed concrete (PC) steel bars, the axial force is transmitted to the friction material. When the fixed plate and the movable plate move relative to each other, frictional force is generated at the friction surface, creating friction resistance.
Operation
The WFD converts the deformation between building floors (caused by earthquakes or wind) into the relative movement of the fixed plate and the movable plate clamping the friction material, absorbing vibration energy through the generated friction resistance.
Oil-Free Friction Material Patent by OILES
We use resin-based friction materials. Its surface is very dense at the molecular level, providing excellent sliding properties due to friction. It can be used without the need for lubricating oil and has superior chemical resistance and high-temperature resistance.
Test Results
This graph shows the relationship between resistance and displacement when small to large amplitudes are applied to the WFD. The graph demonstrates that the WFD has stable performance.
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