Dynamic response of peats. Final research report
Technical Report
·
OSTI ID:445835
The objective of this project were to investigate the dynamic behavior of peat and to evaluate the influence of that behavior on the dynamic response of peat deposits. During the course of the research, the objectives were expanded to explore the effects of strong earthquake shaking on pile foundations embedded in peat deposits. An experimental investigation was undertaken using samples of a peat deposit typical of many large peat deposits in western Washington. A series of ground response analyses was performed to investigate the seismic response of peat deposits. Three vertical profiles through Mercer Slough were analyzed using both equivalent linear and nonlinear ground response analyses. The analyses showed that the soft nature of the Mercer Slough peat would produce amplification of the long-period components of an earthquake ground motion. Comparison of the equivalent linear and nonlinear ground response analyses showed that the equivalent linear model tended to oversoften the peat at low effective confining pressures, leading to underprediction of ground motion amplitudes at low periods.
- Research Organization:
- Washington State Transportation Center, Seattle, WA (United States)
- OSTI ID:
- 445835
- Report Number(s):
- PB--97-132534/XAB
- Country of Publication:
- United States
- Language:
- English
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