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

Table 11

Quantity, lengths, and maximum widths of the cracks in the lower frontal areas of the specimens under the conditions of different energy force values.

Height of drop hammer (m)	1^st group						2^nd group
	Number of cracks		Lengths of the main cracks (mm)		Widths of the main cracks (mm)		Number of cracks		Lengths of the main cracks (mm)		Widths of the main cracks (mm)
	S1-16	Z2-16	S1-16	Z2-16	S1-16	Z2-16	S1-20	Z2-20	S1-20	Z2-20	S1-20	Z2-20
2	0	0	0	0	0	0	0	0	0	0	0	0
4	0	0	0	0	0	0	0	0	0	0	0	0
6	0	0	0	0	0	0	0	0	0	0	0	0
8	0	1	0	446.3	0	0.70	0	0	0	0	0	0
10	1	3	400	595.0	0.15	2.15	1	1	380	220	0.11	0.5
12	2	4	460	720	0.52	2.64	2	2	450	520	0.2	0.85