Experimental Study on the Mechanics Characteristics of CFRP Strengthening of Highway Tunnels at Different Damage States

Table 3

The relationship between load, fracture density, vault settlement, and sidewall convergence.

External load level/failure load	Crack density m/m^2	Vault settlement of the prototype/cm	Sidewall convergence of the prototype/cm
0%	0	0	0
50%	0.585	1.33	0.88
70%	1.39	2.38	2.98
90%	1.6	3.89	4.77
100%	1.6	7.20	7.19