Survey on Major Worldwide Regulations on Seismic Base Isolation of Buildings

Table 15

Return periods for generation of the input accelerograms in the hospital building example.

Case	DT	Fsup	Fsub	FΔ
	TR (years)	TR (years)	TR (years)	TR (years)
Japan	500	500	500	50
China	2500 (0.4 g) 2000 (0.2 g)	2500 (0.4 g) 2000 (0.2 g)	2500 (0.4 g) 2000 (0.2 g)	2500 (0.4 g) 2000 (0.2 g)
Russia	1000	1000	1000	1000
Italy (hospital)	1950	950	950	100
Italy (housing)	975	475	475	50
The USA (ASCE 7-10 2010)	2475	475	475	475
The USA (ASCE 7-16 2016)	2475	2475	2475	2475
Chile	950	475	475	475