Yazar "Fernandez-Steeger, Tomas" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    A comparative study to determine earthquake-induced settlements in sands
    (E Schweizerbartsche Verlagsbuchhandlung, 2024) Koltuk, Serdar; Subasi, Ozan; Iyisan, Recep; Fernandez-Steeger, Tomas
    Time and again earthquake-induced damage occurs worldwide as a result of soil liquefaction, especially in loose sands with high groundwater levels. One of the most common types of damage caused by liquefaction results from vertical soil deformations, in other words settlements. This article contributes to the determination of earthquake-related settlements in dry and saturated sands using two-dimensional finite element analyses (2D-FEA) and semi-empirical methods. The comparison of the results obtained from both methods showed that the 2D-FEA give relatively low settlement values compared to the values obtained from the semi-empirical methods. This is mainly explained by the relatively large horizontal earthquake accelerations resulting from the one-dimensional, equivalent-linear dynamic analyses and by the accumulation of earthquake waves at the upper edges of the numerical models.
  • [ X ]
    Öğe
    Assessment of liquefaction potential during earthquakes by using SPT-number of blows and two-dimensional finite element analyses
    (Springer, 2022) Koltuk, Serdar; Subaşı, Ozan; Fernandez-Steeger, Tomas; İyisan, Recep
    For the planning and design of buildings in earthquake zones with high groundwater levels, the liquefaction potential of the building site has to be investigated and evaluated. In DIN EN 1998-5:2010-12 (2010), the diagrams based on SPT-number of blows are given for the assessment of liquefaction potential. In the present study, this method is first described according to the current state of knowledge. Subsequently, the liquefaction potential of a sandy soil is analyzed using SPT-number of blows and two-dimensional finite element analyses (2D-FEA) with the sand-plasticity model PM4Sand. With respect to the assessment of liquefaction potential, a good agreement between the results obtained from both methods is found. Furthermore, the use of 2D-FEA with the PM4Sand model allows the estimation of earthquake-induced deformations on the soil surface.