Underwater Shaking-Table Investigation of Complex Deep-Water Pile-Cap Foundation for Xihoumen Rail-cum-Road Bridge

Table 3

Natural vibration period of complex pile-cap foundation model.

Number	Water depth (m)	Natural vibration period (s)	Var R (%)
1	0	T 1 = 0.1148	—
2	0.5	T 2 = 0.1172	2.1
3	1.0	T 3 = 0.1212	5.6

Var R is defined as follows: , where T_i and T₁ represent the natural vibration period of pile-cap foundation model in water and without water, respectively.