Study on the Influence of Closed-Cell Aluminum Foam on the Impact Performance of Concrete Pier after Equal Replacement with Stainless Steel Reinforcement

Table 8

Top displacement test results and comparison.

Height of the drop hammer (m)	Average impact velocity (m/s)	1^st group			2^nd group
		Displacement peak values (mm)		Relative ratio (%)	Displacement peak values (mm)		Relative ratio (%)
		S1-16	Z2-20		S1-20	Z2-25
2	0.72	10.19	14.96	31.89	10.98	14.55	24.54
4	1.10	17.79	24.45	27.24	13.15	20.39	35.51
6	1.42	32.11	41.71	27.81	20.75	31.48	34.09
8	1.67	41.76	60.94	31.47	32.1	42.37	24.24
10	1.84	54.33	79.66	31.80	46.49	58.95	21.14
12	2.08	70.13	90.39	22.41	57.55	75.1	23.37