Study on Concrete Pier Impact Performance after Implementing Equal Cross-Section Stainless Steel with Protection from Closed-Cell Aluminum Foam

Table 5

Impact scheme.

Specimen no.	Impact times	Height of the drop hammer (m)	Average impact velocity (m/s)	Accumulated energy (J)	Stress stage of closed-cell aluminum foam
	1	2	0.72	311.04
S1-16	2	4	1.10	1037.04	Yield stage
Z2-20	3	6	1.42	2246.88
S1-20	4	8	1.67	3920.22
Z2-25	5	10	1.84	5951.58	Densification stage
	6	12	2.08	8547.42