Experimental Investigation of the Mechanical Behavior of NC Linings in consideration of Voids and Lining Thinning

Table 3

Main experimental results of lining specimens.

Serial number	Working condition	Crack load (kN)	Displacement at crack load (mm)	Peak load (kN)	Displacement at peak load (mm)	Soundness ζ (%)
1	V0 (crown)	11.15	2.3	61.15	39.3	100
2	V30 (crown)	10.94	2.0	32.73	30.4	53.5
3	V60 (crown)	9.32	1.0	15.30	1.7	25.0
4	V60T25 (crown)	8.31	1.0	12.71	1.4	20.8
5	V60T50 (crown)	8.20	0.9	12.17	1.4	19.9
6	V0 (spandrel)	11.24	2.1	53.81	54.1	100
7	V60 (spandrel)	7.90	1.5	34.34	14.0	63.8
8	V180 (spandrel)	5.67	1.0	7.04	2.5	13.1
9	V30T25 (spandrel)	9.32	1.3	30.40	9.9	56.5
10	V60T50 (spandrel)	7.70	1.2	17.23	5.6	32.0