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

Figure 7

Measured and computed percentage increases of vibration period for the hollow pier specimen in case II as a function of water level: (a) without tip mass; (b) with an 11.4 kg tip mass; (c) with a 23.4 kg tip mass; and (d) with a 31.7 kg tip mass.

(a)

(b)

(c)

(d)