Abstract
A seismic damage rate for segmented pipelines is formulated based on the failure mechanism of mechanical joint system. Current damage rates per unit pipe length were obtained on the basis of observation data which were collected in damaged pipelines suffered by major earthquakes. Newly developed segmented pipe having mechanical stops in Japan are seismically strong enough not to be observed in recent earthquakes. A theoretical approach is adopted to obtain a simple formula of damage rate for this segmented pipe. A new seismic design method is also developed which will be useful for performance-based design of segmented pipelines under seismic risk.
