Model Test on the Vibration Reduction Characteristics of a Composite Foundation with Gravel Cushion under Different Seismic Wave Amplitudes

Table 5

Regression parameters for the vibration reduction rates of the three gravel cushions.

Cushion type			(%)	Correlation coefficient
Single-sized aggregates	−2.12	1.35	25.86	0.93
Two-sized aggregates	−3.11	1.31	23.39	0.89
Continuously graded aggregates	−3.45	1.36	26.33	0.87