Journal article
Spatial incoherence effects on seismic ground strains
Probabilistic engineering mechanics, v 7(4), pp 217-226
1992
Abstract
The analysis and design of buried pipelines to resist seismic ground motions relies on estimates of the seismic ground strains. Current design considerations are based on the
travelling wave assumption, which estimates the maximum ground strain along the pipeline from the ratio of the maximum velocity recorded at the site over the velocity of the apparent propagation of the motions; this assumption, however, ignores the contribution of spatial incoherence to the seismic strains. It is shown through strain and velocity simulations from a spatial variability model that the travelling wave assumption produces strain estimates that considerably underestimate the actual strains of the earthquake in near-source regions. It is also shown, that there exists a critical apparent propagation velocity of the seismic motions. For apparent propagation velocities higher than the critical value, seismic strains are essentially constant and controlled by the incoherence of the motions. For apparent propagation velocities lower than the critical value, the seismic strains gradually increase and, eventually, become proportional to the inverse propagation velocity.
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17 citations in Scopus
Details
- Title
- Spatial incoherence effects on seismic ground strains
- Creators
- Aspasia Zerva - Drexel University
- Publication Details
- Probabilistic engineering mechanics, v 7(4), pp 217-226
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Scopus ID
- 2-s2.0-38249015115
- Other Identifier
- 991019174738204721