Liquefaction Behavior of Palar Sand at Low Strain
摘要
Loose sand deposits that are saturated may undergo liquefaction during an earthquake. The damage caused by liquefaction can happen both during and after the earthquake, as excess pore pressures dissipate over time. This study examines the liquefaction resistance of Palar River sand using cyclic triaxial tests. Strain-controlled tests are conducted on large reconstituted triaxial samples at a low cyclic shear strain of 0.015 mm at a frequency of 0.75 Hz, at a confining pressure of 50 and 75 kPa, and at a relative density of 35%. The study also examined the effects of various parameters such as relative density, amplitude of cyclic shear strain, confining pressure, and frequency of cyclic loading on the liquefaction resistance of Palar sand. The results of the study highlight that the lower confining pressure would produce a more rapid generation of excess pore pressure and fewer cycles are required; also at low strain amplitude liquefaction would not occur.