Fuzzy Control for Seismic Protection of Semiactive Base-Isolated Structures Subjected to Near-Fault Earthquakes

Table 2

Variation of site factors and periods for Chi-Chi earthquake under different ground sites.

Site	(m/s)	(s)	(s)	(s)	(s)
Hard	>530	0.28	0.66	4.60	1.09	0.55	0.70
Medium	390–530	0.40	0.96	5.80	1.13	0.82	0.20
Soft	<390	0.60	1.60	6.40	1.16	1.10	1.00