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A6: Shake Tables

As shown below, the laboratory is equipped with two shaking tables each of which have the following specifications. Displacement: ±2 inches, velocity: ± 35 in/sec, maximum acceleration: 4 g, operating frequency range: 0-50 Hz, table mass: 800 lbm, maximum specimen mass: 450 lbm, maximum overturning moment: 10,000 ft-lbf, maximum off-center load moment: 3,000 ft-lbf. These shake tables is equipped with a controller that is capable of operating the two tables synchronously or independently in displacement and acceleration feedback control.