Journal
EARTHQUAKE SPECTRA
Volume 29, Issue 2, Pages 609-632Publisher
SAGE PUBLICATIONS INC
DOI: 10.1193/1.4000137
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Funding
- National Science Foundation (NSF) through the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) program via NSF [0421142]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0421142] Funding Source: National Science Foundation
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A systematic study is presented herein on the seismic response of buried pipelines subjected to ground fault rupture in the form of normal faulting. In this study, advanced computational simulations are conducted in parallel with physical testing using a geotechnical centrifuge. For the numerical simulations, the pipeline was modeled using isotropic 3-D shell elements and the soil was modeled using either 1-D spring elements or 3-D solid (continuum) elements. The results from continuum finite-element analyses are compared with those from a Winkler-type model (in which the pipe is supported by a series of discrete springs) and with results from centrifuge tests. In addition, via appropriate modeling of the soil-pipe interaction, the q-z relation of the soil medium is elucidated for normal faulting events. The numerical analysis results demonstrate the potential for continuum modeling of events that induce pipe-soil interaction and results in improved understanding of pipe-soil interaction under normal faulting.
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