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

Table 9

Peak strain and stress test results of #4 reinforcement.

Height of drop hammer (m)	Average impact velocity (m/s)	1^st group				2^nd group
		No. 4 peak		No. 4 stress (MPa)		No. 4 peak		No. 4 stress (MPa)
		S1-16	Z2-20	S1-16	Z2-20	S1-20	Z2-25	S1-20	Z2-25
2	0.72	543.38	694.88	104.87	138.98	203.14	355.09	39.21	71.02
4	1.10	864.53	1050.23	166.85	210.05	460.43	634.13	78.28	126.83
6	1.42	1564.35	1573.97	325.08	314.79	550.25	809.56	106.20	161.91
8	1.67	2314.26	2387.23	465.95	—	652.21	872.95	125.88	174.59
10	1.84	2543.88	2564.25	516.06	—	958.06	1004.32	184.91	200.86
12	2.08	2812.34	2816.18	546.64	—	1011.43	1198.64	195.21	239.73