Centrifuge Model Tests of the Effect of the Ground Motion Coherence Function on the Amplification of a Saturated Soil–Water Site

Table 1

Amplification factor and frequency of different vibration modes loaded with different conditions for the model for the surface without water. f_d: predominant frequency; AF: amplification factor.

Input loading (g)	Unmultiplied coherent function				Multiplied coherent function
	First-order mode		Second-order mode		First-order mode		Second-order mode
		AF		AF		AF		AF
0.025	0.21	11.75	2.39	6.78	0.33	6.67	2.36	2.50
0.050	0.40	5.95	1.88	3.74	0.49	3.93	1.89	1.67
0.100	0.34	5.37	2.42	3.21	0.40	3.49	2.42	1.21
0.200	0.29	3.98	2.40	0.94	0.32	2.60	2.49	0.38
0.400	0.29	1.93	1.26	0.31	0.37	1.27	1.25	0.22