ABSTRACT
System identification involves determining the state of a system and values of system parameters through comparisons of predictions with observed responses. (Ljung 1999). When applied to structural engineering, this is equivalent to finding the parameter values for models that may represent the behavior of a given structure. Conventional system identification strategies, such as model updating, use optimization methods with measured data to calibrate a mathematical model of a structure that is often based on the model used for design. Model updating in structural engineering may be performed using vibration measurements (Brownjohn 2003; Brownjohn et al. 2003; Friswell and Motterhead 1995; Koh et al. 2003) or using static responses (Banan et al. 1994; Sanayei et al. 1997; Sanayei and Onipede 1991; Sanayei and Saletnik 1996).
