LIFELINE PERFORMANCE EVALUATION

摘要

Utility lifeline behavior for seismic loadings is examined for selected urban areas in the US and Japan.From the data available [e.g., Reed, et al., (2002), and Nojima, et al. (2001)], the empirically derivedfragilities are examined and categorized for 'ductility' and 'brittleness.' Analogies of lifelinenetwork behavior with mechanical modes of failure generally labeled as 'ductile' and 'brittle' aremade. In a general sense, 'ductile' systems exhibit gradual failures widespread over time, whereas'brittle' systems experience rapid failure when placed under duress. Through these comparisons,general guidelines for evaluating networks and making improvements to increase the ductility aremade.