Liquefaction

Abstract:

A Seismic Hazard Analysis for earthquake-induced pore pressures in sands is proposed. The method employs a model for probabilistic prediction of excess pore pressures given the earthquake magnitude and its distance from a site. The model, when incorporated in conventional Seismic Hazard Analysis procedures using the computer, can provide estimates of annual probabilities of excess pore pressures exceeding specified values.
This paper presents both the model for probabilistically predicting excess pore pressures and the procedure for Seismic Hazard Analysis for pore pressures. In addition, discussions are included on the application of the Seismic Hazard Analysis in an Integrated Seismic Risk Analysis which provides estimates of overall risk associated with excess pore pressures generated in loose sands during earthquakes.

The research described here was funded by a grant from the National Science Foundation under Grant No. PFR-7823082.

Relevant Publications:

• Yegian, M.K., Ghahraman, V.G., Nogole-Sadat, M.A.A., and Daraie, H. (1995) "Liquefaction During 1990 Manjil, Iran, Earthquake, I: Case Histories Data," Bulletin of the Seismological Society of America, February.
• Yegian, M.K., Ghahraman, V.G., Nogole-Sadat, M.A.A., and Daraie, H. (1995). "Liquefaction During 1990 Manjil, Iran, Earthquake, II: Case Histories Analyses," Bulletin of the Seismological Society of America, February.
• Yegian, M.K., Ghahraman, V.G. and Harutuinyan, R.N. (1994). “Liquefaction and Embankment Failure Case Histories, 1988 Armenia Earthquake.” Journal of the Geotechnical Engineering Division, ASCE, March
• Yegian, M.K., Nogole-Sadat, M.A., Ghahraman, V.G. and Darai, H. (1993). “Liquefaction Case Histories from 1990 Manjil, Iran Earthquake.”. Proceedings of the Third International Conference on Case Histories in Geotechnical Engineering, St. Louis, Missouri, June.
• Yegian, M.K. (1984). “Probabilistic Seismic Hazard Analysis for Pore Pressure Build-up in Sands.” Proceedings of the Eighth World Conference on Earthquake Engineering, San Francisco, California.
• Yegian, M.K. and Vitelli, B. (1981). “Analysis for Liquefaction: Empirical Approach.” Proceedings of the International Conference on Earthquake Engineering, St. Louis, Missouri, April.
• Yegian, M.K. (1980). “Empirical Procedure for Pore Pressure Prediction in Sands”, Proceedings of the Seventh World Conference on Earthquake Engineering, Istanbul, September.
• Yegian, M.K. and Whitman, R.V. (1977) “Risk Analysis for Ground Failure by Liquefaction”, Journal of the Geotechnical Engineering Division, ASCE, July.
• Yegian, M.K. and R.V. Whitman. (1977). “Soil Liquefaction Analysis Based on Field Observations.” Proceedings of the Sixth World Conference on Earthquake Engineering, India, January.
• Yegian, M.K. and Oweis, E. (1976). “Liquefaction and Cyclic Mobility of Saturated Sands” (discussion), Journal of the Geotechnical Engineering Division, ASCE, March.