Objectif
Several countries in Europe have paid a heavy price in terms of life loss and have suffered a serious damage to property and cultural heritage due to earthquakes in recent past. Failure of high hazards dams, earth structures, slopes and foundations have been attributed to the liquefaction of saturated silty soils. Therefore, numerous studies have been conducted to-date to understand the effects of silt on cyclic resistance of silty sands and its effect on liquefaction screening. However, the literature review points out that, there is no clear agreement on how silt content affects the liquefaction resistance and penetration resistances measured to diagnose it. The proposed project aims to revise the current liquefaction screening methods by taking into account the effects of consolidation characteristics on cone penetration resistance and liquefaction resistance. The data that will be obtained from Seismic Piezocone Penetration Tests (SCPTu) already in the database and possible future earthquake silty soil sites in Turkey will provide a perfect opportunity to further improve our understanding on effects of penetration velocity (v), cone diameter (d) and consolidation characteristics (ch) of silty sands on cone penetration resistance for different intergrain contact densities. Moreover, laboratory experiments will provide a clear perspective on effects of intergrain contact density of soils containing non-plastic fines on liquefaction resistance. As a result, the correlation between the liquefaction resistance, cone penetration resistance and normalized penetration rate T(vd/ch) will be presented and compared with the current CPT-based liquefaction screening methods. It is hoped that the majority of the inconsistencies in the literature will be resolved and engineers will have better understanding on the behavior of silty soils under seismic conditions at the end of this proposed project.
Champ scientifique
Appel à propositions
FP7-PEOPLE-2009-RG
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Régime de financement
MC-IRG - International Re-integration Grants (IRG)Coordinateur
35430 İzmir
Turquie