This technology is a steel damper that absorbs building vibrations through the elastic and plastic deformation of steel plates when horizontal force is applied between a first fixing plate connected to the upper part of a building and a second fixing plate connected to the lower part. The second and third steel plates are arranged in parallel at intervals in front of and behind the central first steel plate.
Conventional steel dampers face a trade-off where increasing stiffness and strength reduces ductility, and vice versa, necessitating uneconomically large steel plates to achieve both. Such large dampers are sometimes impossible to install due to site constraints, and prior technologies like buckling-restrained dampers have limitations in efficiently absorbing vibrations by failing to provide both stiffness and ductility simultaneously.
This technology uses 280mm wide, 135mm long, and 18mm thick first and second steel components as the top and bottom, connected by support sections. The central first steel plate is designed for stiffness with a 59mm wide support, while the front and rear plates are designed for ductility with 30mm wide supports, allowing plates with different properties to operate in parallel. The support length and thickness are standardized at 220mm and 18mm for simple manufacturing. It can be applied to inter-story vibration control in high-rise mixed-use and office buildings, seismic retrofitting for schools and public offices, and reinforcement for pilotis-structured housing. It remains rigid during minor earthquakes and dissipates energy by stretching over a wide range during major ones, all while remaining compact enough for tight installation spaces.
This invention was developed with support from the Ministry of Education's LINC 3.0 project.
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