Experiment on Natural Frequency Change of Reinforced Concrete Members under Low Cycle Loading

Table 3

Harmonic vibration loading scheme.

Period	Amplitude
	A = 30 mm	A = 24 mm	A = 18 mm
T = 1.875 s	Z-1/J-1/M-1	Z-4/J-4/M-4	Z-7/J-7/M-7
T = 2.4 s	Z-2/J-2/M-2	Z-5/J-5/M-5	Z-8/J-8/M-8
T = 3.0 s	Z-3/J-3/M-3	Z-6/J-6/M-6	Z-9/J-9/M-9