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

Table 8

Test results of the peak strain and stress of the No. 4 reinforcement.

Height of drop hammer (m)	Average impact velocity (m/s)	1^st group				2^nd group
		No. 4 peak (με)		No. 4 stress (MPa)		No. 4 peak (με)		No. 4 stress (MPa)
		S1-16	Z2-16	S1-16	Z2-16	S1-20	Z2-20	S1-20	Z2-20
2	0.72	543.38	797.15	104.87	159.43	203.14	405.6	39.21	81.12
4	1.10	864.53	1159.78	166.85	231.96	460.43	735.43	78.28	147.09
6	1.42	1564.35	1716.23	325.08	343.25	550.25	988.73	106.20	197.75
8	1.67	2314.26	2536.65	465.95	—	652.21	1123.45	125.88	224.69
10	1.84	2543.88	2872.25	516.06	—	958.06	1473.18	184.91	294.64
12	2.08	2812.34	2946.47	546.64	—	1011.43	1896.14	195.21	379.23