Features
Sumitomo Rubber’s GRAST vibration control technology brings
you a safer and more comfortable lifestyle.
Through the unique ability of super high damping rubber to instantly convert shearing deformation to heat energy, building vibrations ranging from minute wind and traffic vibrations to the massive vibrations of major earthquakes can be absorbed. GRAST super high damping technology is here to bring you a safer and more comfortable lifestyle.
Characteristics of high damping rubber vibration suppression materials manufactured by Sumitomo Rubber
Control major vibrations even at compact sizes.
High damping cable damper for cable-stayed bridges
- Minimizes all types of vibrations, ranging from minute vibrations to massive vibrations.
- Can be applied to a wide range of structures, ranging from short-cycle to long-cycle.
- Minimal temperature dependency: Exhibits stable damping properties within a temperature range of -20°C to 60°C.
- Extremely high rigidity allows superior damping performance even at compact sizes.
- Proven to undergo negligible change in performance even after repeated use.
- Simple structure makes installation and maintenance easy.
Characteristics of high damping rubber
What is high damping rubber
High damping rubber is even more specialized for damping than the rubber used in racing tires.
Characteristics of high damping rubber
Why does high damping rubber exhibit such superb damping properties? The answer is high damping rubber’s unique formulation.The superior damping abilities exhibited by this type of rubber are the result of three elements: viscous damping element and spring = the elastic element and friction damping element.
Earthquake resistance and improved livability effects,
as proven by a joint study with Kyoto University
Since 2005, Sumitomo Rubber has executed joint research with the Takewaki/Tsuji laboratory, Dept of urban & Environmental Engineering, Kyoto Universuty. In this joint research, the phenomena of decreased earthquake response and wind response when Sumitomo Rubber super-high damping rubber damping materials are built into high-rise buildings have been verified through experimental research such as an ultra-minute deformation dynamic loading experiment, and theoretical research such as an equivalent linear analysis, etc. It was verified that over a wide range of vibrations, from minor everyday vibrations such as those from wind, etc. to major earthquakes, the acceleration response as relates to livability and the displacement response as relates to structural safety were both considerably reduced in a well-balanced manner.(1)(2)
Documentation
- (1) Tsuji, Tani, Takewaki and Matsumoto: Improvement of residence performance of buildings through the use of the high hardness rubber visco-elastic damper, 12th Japanese Earthquake Engineering Symposium thesis collection CD-ROM, and pp. 970-973 (2006).
- (2) Tsuji, Tani, Suzuki, Yoshitomi and Takewaki, Matsumoto: Additional damping at minimum amplitude with high hardness rubber dampers to reduce wind vibration response in buildings, 56th Theoretical Adaptability Lecture Meeting Thesis Collection (2007)
Sumitomo Rubber's unique technology controls various forms of vibration through the magic of
high-performance super high damping rubber.
