Arc-Surfaced Frictional Damper for Vibration Control in Container Crane

Table 5

Earthquake ground motions.

Input motion	Year	PGA (g)	Domain period (s)	Duration (s)
El Centro NS	1940	0.44	1.462	30
		0.62
Taft EW	1952	0.44	0.368	30
		0.62
Northridge EW	1994	0.44	1.138	30
		0.62
Kobe NS	1995	0.44	1.241	30
		0.62