EARTHQUAKE INDUCED LIQUEFACTION OF SEDIMENTS
Abstract
Liquefaction is a dangerous effect of strong earthquakes which can locally result in great damage to buildings and many casualties. Liquefaction occurs if grained and saturated unconsolidated sediments are exposed to dynamic stress, which causes cyclic dynamic deformations and the collapse of the loose internal structure and shear strength. The mechanism is very complex and thus the subject of intense investigations which lead to better understanding. Of the methods used to evaluate the liquefaction hazard, the most important are in-situ tests in boreholes and the empirical relationship between geomechanic parameters and liquefaction susceptibility. Such evaluations are part of seismic microzonation studies. Although up to now there has been no proven case of liquefaction in Slovenia, it is necessary to include it in seismic hazard assessments.
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