A markov model for local and global damage indices in seismic analysis

ABSTRACT

Current methods for evaluating the overall seismic perfomance of structural systems are based on global damage indices which are usually obtained by heuristic combinations of local damage indices. The local indices qre related to the parameters of restoring force defined at the critical cross-sections of structural system. However, a global measure of damage can not characterize structural atate uniquely, provides only a crude estimate of structural perfomance during seismic events, and cannot be used to assess structural vulnerability to future loadings. In addition to the above limitations, current estimates of seismic reliability analysis of building structures are based on (i) incomplete representations of seismic hazard, e.g., by the peak ground acceleration a10 that id=s exceeded at least once in 50 years with probability 10