The new high-performance 3-D shaking table system provides the Japan's best performance in reproducing the large earthquake motions observed in Japan in recent years. The system also possesses the capability of producing the world's largest amplitude of displacement in long-period motion.
Configuration
The key design of the system is the double-deck shaking tables configuration; the larger, main table is to reproduce usual earthquake ground motion and the smaller, upper table, which is detachable, is to reproduce large amplitude displacements of a super high-rise building caused by long-period ground motion.
Shaking Table System (Small table attached)
Demonstrative Experiment (Long-period Motion)
Features
Large Table
- 5 m x 7 m flatbed table with the rated load capacity of 600 kN
- Capable of reproducing virtually all the earthquake motions with large displacements observed in Japan in recent years
Small Table (detachable)
- Specifically designed to reproduce large amplitude displacements of the upper floors of a super high-rise building in long-period ground motion
- Capable of reproducing large amplitude displacement of up to 2.7 m in combined operation with the main table
Environmental Concerns
The entire shaking table system is mounted on the floating foundation made of 40,000 kN of reinforced concrete block, which is isolated from the outer structure by numbers of oil dampers and air springs in order to minimize the propagation of vibration to the residential neighborhood.
Specifications
| Large Table | Small Table | ||
|---|---|---|---|
| Table Size | 5 m x 7 m | 2 m x 2 m | |
| Rated Loading Capacity | 600kN | 50 kN | |
| Max Acceleration | Horizontal | 2.0 g | 0.5 g |
| Vertical | 2.0 g | - | |
| Max Velocity | Horizontal | 200 cm/sec | 250 cm/sec |
| Vertical | 100 cm/sec | - | |
| Max Displacement | Horizontal | X:±50 cm Y:±70 cm | ±200 cm (X: ±250 cm Y: ±270 cm) * |
| Vertical | ±30 cm | - (±30 cm) * |
|
* in combined with the main table
Oveall View of the System (Small Table Attached)
