Accession Number : ADP002386

Title :   Probability of Liquefaction in a 3-D Soil Deposit,


Personal Author(s) : Haldar,A.

Report Date : SEP 1983

Pagination or Media Count : 73

Abstract : Historically, earthquake-induced liquefaction has caused an enormous amount of damage in terms of loss of human life, property damage, human suffering and environmental damage. A probabilistic three-dimensional liquefaction model is proposed here considering the damage aspect of the problem. Considerable uncertainty is expected in the estimation of several parameters in a liquefaction model. The estimation of in situ relative density is one of them. A new relationship, designated as the Haldar and Miller relationship, is proposed here between the Standard Penetration Test value and the in situ relative density. The in-situ shear resistance of a soil deposit is evaluated here by introducing a shear strength parameter R. Using large-scale shaking table test results, the relationship is corrected for the compliance effect, sample preparation methods, mean grain size, multidirectional shaking and some other secondary factors. There is also high uncertainty in the load parameters. Hence, the seismic activity of the region should bve given serious attention in a liquefaction study. This probabilistic model is a first step toward developing a comprehensive decision analysis framework. Recommendations are also made here for future research work in the area of liquefaction.

Descriptors :   *Soil mechanics, *Failure(Mechanics), Soils, Earthquakes, Mathematical prediction, Mathematical models, Probability, Symposia

Distribution Statement : APPROVED FOR PUBLIC RELEASE