Prototype Experimental Investigation of the Failure Mechanism and Crack Propagation of Segment Lining for Staggered Jointed Assembly

Table 1

The relationship between crack development and structural mechanical properties.

Feature points	Fracture	Maximum crack width (mm)	Maximum fracture length (mm)	Maximum opening (mm)	Bending moment (kN m)	Deformation (mm)	Maximum reinforcement strain (με)	Eccentric distance (m)
P1	Visible cracks appear	0.1	708	0.402	648	7.23	229	0.341
P2	The crack width reaches the limit	0.21	2000	0.513	802	8.62	267	0.343
P3	The number of cracks is increasing rapidly	0.35	2000	0.811	931	11.47	611	0.345
P4	Crack width increases rapidly	0.5	2000	1.197	1214	14.66	985	0.450
P5	Structural failure	5.4	2000	6.914	1922	45.65	2023	0.713