Study on Modal Dynamic Response and Hydrodynamic Added Mass of Water-Surrounded Hollow Bridge Pier with Pile Foundation

Figure 20

Vibration period ratios of the specimen in case III as a function of water level correspond to: (a) first mode along the x-axis; (b) first mode along the y-axis; (c) second mode along the x-axis; and (d) second mode along the y-axis.

(a)

(b)

(c)

(d)