Design Earthquake Response Spectrum Affected by Shallow Soil Deposit

Table 3

Short-period amplification factor (DRS-1).

	500-year return period (0.11 g)			1000-year return period (0.154 g)			2400-year return period (0.22 g)
	IBC 2015	Analysis result		IBC 2015	Analysis result		IBC 2015	Analysis result
		Mean	σ		Mean	σ		Mean	σ
SB	1.00	1.06	0.019	1.00	1.06	0.019	1.00	1.06	0.024
SC	1.20	1.58	0.296	1.20	1.55	0.307	1.18	1.51	0.320
SD	1.58	1.50	0.328	1.49	1.42	0.337	1.36	1.27	0.359
SE	2.44	1.06	0.336	2.18	0.98	0.338	1.78	0.82	0.316

Standard deviation.