Displacement Analysis of Soft Soils under Earthquake Effect
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Keywords:
Bearing Capacity, Displacement, Soft Soil, Earthquake Effect, Finite ElementsAbstract
Soft soils, just like liquefiable soils, pose a major problem in the field of geotechnical
engineering. Excessive displacements that occur due to soil-related problems are generally described as
liquefaction. Especially in regions located on the earthquake zone, excessive settlements due to loss of
bearing capacity in soft soils cause serious losses of life and property. In recent years, due to population
growth, its use has become mandatory in areas with soft soil. For this reason, analyzing and examining the
behavior of soft soils during earthquakes has become an important issue. In this study, a soft clay soil
sample was analyzed under earthquake effect using Plaxis 2D, a finite element program. Acceleration time
parameters of the earthquake that occurred in Izmir, Turkey on October 30, 2020 were used in dynamic
analyses. Dynamic analyzes were carried out by applying the limit bearing capacity value (BC) obtained in
the study as a distributed load on the soil at certain rates (25%, 50%, 75%, 100%). As a result of dynamic
analysis, graphs were created with the displacement values taken from the midpoint of the foundation plate,
and important information was obtained about the behavior of soft clay soils under earthquake effects. As
a result, it has been shown through analysis that the excessive displacements that occur in the soil during
the earthquake are not only due to liquefaction, but also pose a major problem in soft soils.
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