NCEER-89-0022 | 8/24/1989 | 214 pages
TOC: The table of contents is provided.
Keywords: Water Delivery Systems, Seismic Risk Analysis, Cast Iron Pipes, Lifeline Systems, Buried Pipelines, Pipeline Joints, and Soil Properties.
Abstract: The behavior of straight joined buried pipelines subjected to seismic wave propagation is investigated in this study. A realistic model is developed for the seismic response analysis of straight joined buried cast-iron pipes with lead-caulked joints and ductile iron pipes with rubber-gasketed joints. This model takes into consideration the non-linearity as well as variability of the pipeline and ground characteristics. The results of the analysis under seismic wave propagation indicate that variability can have a significant influence upon response parameters. The seismic vulnerability of these pipes is examined as a function of the seismically induced ground strain. The effects of ground rotation are found to be negligible. Such a vulnerability analysis made it possible to develop estimation of damage ratios due to a joint pull-out failure mode. These estimates are benchmarked against observed damage to water systems and are found to yield reasonable results.