Wind sway can induce symptoms of “sea sickness” in air traffic controllers, making it difficult to continue operations. In the new control tower of Tokyo International Airport, we used Japan’s first reinforced concrete tower to increase tower mass, and applied measures to suppress wind sway. We also used two hybrid seismic damping devices to further improve the working environment for air traffic controllers. This technology is specialized for control towers, and is adopted to reduce sway due to the whipping phenomenon that is peculiar to towers.
The combination of oil dampers with a connecting system jointly developed by industry and academia produces dampers in which lock pins act in response to the amplitude of seismic oscillation. This innovative idea does not use electricity. It was featured on the NHK Special show “MEGA CRISIS,” and won the Technology Award from The Japan Society of Seismic Isolation in 2016.
For buildings which must provide continued usability from a BCP perspective, such as key disaster prevention facilities and facilities of high social importance, we propose seismic resistance grades in line with needs, and we ensure high seismic resistance safety by using the latest seismic isolation technology.
For buildings which must provide continued usability from a BCP perspective, such as key disaster prevention facilities and facilities of high social importance, we propose seismic resistance grades in line with needs, and we ensure high seismic resistance safety by using the latest seismic damping technology.
We provide seismic remodeling while accommodating buildings’ various requirements, such as preserving exterior appearance, avoiding major impediment to internal functions, keeping the building in use through construction work, and using construction methods adapted to design appearance.
We create safe and secure spaces and propose buildings of superior safety, habitability, and economy, for the large spaces for crowd-attracting sports facilities, public facilities, and facilities which hold large structures. The resulting spaces fulfill their functions while also being comfortable and attractive.
For Suntory Hall, the first building in Japan to obtain Ministry approval for a specified ceiling, we adopted the “Ministry approval route,” the design route from the Seismic Resistance Ceilings Directive, to verify structural safety. We used time history response analysis to simulate the oscillation of actual earthquakes.