Structural Health Monitoring of Precast Concrete Box Girders Using Selected Vibration-Based Damage Detection Methods

Table 2

Error in predicted damage location by each method, listed as a fraction of measurement point spacing.

Method	Experimental Results				Numerical Results
	Max. error	Avg. error	Stand. dev.	% ambig*	Max. error	Avg. error	Stand. dev.	% ambig*
CMS	0.82	0.34	0.27	8	0.25	0.12	0.07	0
DI	0.82	0.37	0.22	25	0.55	0.25	0.15	0
MCF	0.82	0.35	0.26	25	0.65	0.20	0.17	33

*indicates the percentage of damage cases that produced a second peak that was either at least 75% of the magnitude of the highest peak, or nearer to the damage location.