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

Table 6

Impact force test results and comparison.

Height of the drop hammer (m)	Average impact velocity (m/s)	1^st group			2^nd group
		Peak impact force (kN)		Relative ratio (%)	Peak impact force (kN)		Relative ratio (%)
		S1-16	Z2-16		S1-20	Z2-20
2	0.72	111.57	68.95	38.2	89.3	61.9	30.68
4	1.10	200.49	138.41	30.96	124.61	87.95	29.42
6	1.42	313.66	202.72	35.37	153.47	114.47	25.41
8	1.67	478.85	360.65	24.68	349.4	292.82	16.19
10	1.84	672.11	618.28	8.01	578.77	498.52	13.87
12	2.08	830.39	756.08	8.95	781.72	737.35	5.68