Study on Joint Damage of Double Prefabricated Fragments Penetrating Finite Thickness Concrete

Table 4

Orthogonal optimization table of 5 factors and 5 levels for different surface fragment penetration.

Numbers	d (mm)	α (°)	β1 (°)	β2 (°)	Combinations (m/s)
					1	20	15	0	0	500	1000
2	30	30	15	15	500	2000
3	40	45	30	30	1000	1000
4	50	60	45	45	1000	2000
5	60	75	60	60	2000	2000