On March 19, Kajima Corporation opened a special website for GREENxEXPO 2027, which is just one year away from its opening.
The company is responsible for the construction of “KAJIMA TREE,” a symbolic tower for this year’s Horticulture Expo that reuses wood from the “O-roof Ring” at Expo ’70 Kansai, Osaka, Japan.
The construction of KAJIMA TREE employs wooden vibration control technology inspired by traditional Japanese architecture. Multiple timbers are combined with steel dampers (vibration control devices) to enhance building safety through a mechanism that flexibly absorbs energy from wind and earthquakes.
The two types of dampers for the vibration control system planned for application are the “column-to-column vibration control damper” (installed between columns), which is a vertical application of the column-to-column vibration control system also used in the Tohoku Branch Building to be completed in Sendai in FY2028, and the “boundary beam vibration control damper” (installed on the beams connecting the cores between the columns at the four corners of the building).
Towers and other tower-like buildings are subject to significant deformation, such as bending of the entire building due to lateral forces from wind and earthquakes.
After dismantling the main material, the timbers of the main roof ring, are stored and managed in Tatebayashi City, Gunma Prefecture, and will be reborn by Kajima Corporation as the KAJIMA TREE, a landmark of the Horticultural Expo.
The theme of GREENxEXPO 2027, which will be held for the first time in about 37 years since the Osaka Flower Expo in 1990, is “Tomorrow’s Landscape for Creating Happiness. The exhibition will be held from March 19 to September 26, 2027, and will utilize approximately 100 hectares on the south side of the former Kamiseya Communication Facility in Yokohama City, Kanagawa Prefecture.
© Source travel watch