Research Article

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

Table 3

Error in predicted damage location by each method, listed as a fraction of measurement point spacing, when 15 and 79 measurement points were used.

Method15 points79 points
Max. errorAvg. errorStand. dev.% ambig*Max. errorAvg. errorStand. dev.% ambig*

CMS0.300.120.0600.500.500.0030
DI0.500.260.1500.500.500.0012.5
MCF0.500.200.14400.500.500.00140

*indicates the percentage of the 40 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, including near support damage cases.