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

Table 2

Yield loads and yield displacements.

Specimen	Item
	Yield moment (N·mm)	Yield load (N)	Yield displacement (mm)
First group	115.3 × 10^6	82.2 × 10^3/60	8.7
Second group	235.9 × 10^6	148.7 × 10^3/130	15.5
Third group	187.3 × 10^6	122.1 × 10^3/110	11.8