Songdo POSCO E&C Twin Towers

Taichung Treasure Garden
Songdo POSCO E&C Towers
​Songdo POSCO E&C Tower 160 Ton TMD in action during the storm event

​Songdo POSCO E&C Twin Towers are high-rise office buildings with the height of 185m.
They are located in Songdo city, Korea where there is a strong wind constantly blowing from the sea, were determined to be in need of vibration control device after reviewing the wind tunnel test results. 

80 ton TMD was installed on the Rent Tower on the left, and 160 ton TMD was installed on the Office Tower on the right.
Both of the TMDs are sliding type TMD with their moving mass sitting on top of the Linear Motion Guide system for movement.
Also, both TMDs utilize Laminated Rubber Bearings(LRB) commonly used in vibration isolation area to support the weight of the TMD's moving mass in order to minimize its friction force that can hamper the TMD's control performance.
Rent Tower TMD Specifications:

 ▣  Type: Sliding type TMD with LRB
 ▣  Control direction: horizontal dir.
 ▣  Specification
  - Moving mass: 80 ton
  - Size :  5.49m x 5.50m x 4.163m(H)
  - Stroke: +/- 300mm (x-dir & y-dir) 
  - Optimal damping ratio : 4.47%(x-dir),  4.69(y-dir)
 ▣  Conceptual & Detailed Design / Manufacture / Installation / 
    / Performance test /
Picture
Songdo POSCO E&C Tower 80 Ton TMD
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Songdo POSCO E&C Tower 160 Ton TMD
Office Tower TMD Specifications:

 ▣  Type: Sliding type TMD with LRB
 ▣  Control direction: horizontal dir.
 ▣  Specification
  - Moving mass: 160 ton
  - Size :  6.83m x 6.83m x 4.5m(H)
  - Stroke: +/- 250 mm (x-dir & y-dir) 
  - Optimal damping ratio :  6.11%(x-dir), 6.56(y-dir)
 ▣  Conceptual & Detailed Design / Manufacture / Installation / 
    / Performance test /