کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
304281 512794 2013 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Strain effects on kinematic pile bending in layered soil
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Strain effects on kinematic pile bending in layered soil
چکیده انگلیسی

The kinematic bending of single piles in two-layer soil is explored to account for soil stiffness degradation and associated damping increase with increasing levels of shear strain, a fundamental aspect of soil behaviour which is not incorporated in current simplified seismic design methodologies for pile foundations.A parametric study of a vertical cylindrical pile embedded in a two-layer soil profile to vertically-propagating S waves, carried out in the time domain by a pertinent beam-on-dynamic-Winkler-foundation (BDWF) model, is reported. Strain effects are treated by means of the equivalent-linear procedure which provides soil stiffness and damping ratio as function of shear strain level. Whereas the approach still represents a crude representation of the actual soil behaviour to dynamic loading, it is more realistic than elementary solutions based on linear visco-elasticity adopted in earlier studies.The paper highlights that soil nonlinearity may have either a detrimental or a beneficial effect on kinematic pile bending depending on the circumstances. The predictive equations for kinematic pile bending in visco-elastic soil recently developed by the Authors are extended to encompass strain effects. Numerical examples and comparisons against experimental data from case histories and shaking table tests are presented.


► Kinematic pile bending is explored accounting for soil strain dependence.
► Strain effects are treated by means of the equivalent-linear procedure.
► Numerical examples and comparisons against experimental data are presented.
► Soil nonlinearity may be detrimental or beneficial for kinematic pile bending.
► Previous predictive equations are extended to encompass soil strain effects.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Dynamics and Earthquake Engineering - Volume 49, June 2013, Pages 231–242
نویسندگان
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