Study on Cumulative Damage Law of Stainless Steel-Reinforced Concrete Columns under Step Impact Loading

Table 3

Damage factor changes under continuous impact.

Specimen	Numbers of impacts	Acoustic velocity average (km/s)		Damage factor	Impact height
		Before impact	After impact
R1	1	4.167	4.156	0.0053	2 m
	2	4.156	4.127	0.0139	4 m
	3	4.127	4.051	0.0365	6 m
	4	4.051	4.018	0.0162	8 m
R2	1	4.258	4.243	0.0070	2 m
	2	4.243	4.202	0.0192	4 m
	3	4.202	4.065	0.0641	6 m
	4	4.065	4.024	0.0201	8 m