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Nhan đề: Numerical Analysis of Rate-Dependent Reaction of Pile in Saturated or Liquefied Soil
Tác giả: Uzuoka, Ryosuke
Sento, Noriaki
Kazama, Motoki
Từ khoá: Saturated soils
Loading rates
Soil analysis
Soil liquefaction
Soil water
Parameters (statistics)
Năm xuất bản: 3/2005
Tóm tắt: The purpose of this study is to clarify the loading rate dependency of subgrade reaction of a single pile in saturated or liquefied soil. The parametric studies were performed by incorporating the soil-pore water coupled formulation and a newly proposed constitutive model for sand. The model can explicitly treat the degree of liquefaction by changing the lower limit of the mean effective stress. The liquefied soil at a certain depth around a pile is modeled with finite elements under plane stress condition. The subgrade reaction of a pile is calculated under various loading frequencies, permeability and degrees of liquefaction. The results of the parametric studies show that the subgrade reaction varies with loading rates, permeability and degrees of liquefaction, and the dimensionless subgrade reaction normalized by that without seepage has a unique relation with dimensionless time factor which consists of pile diameter, loading rate, permeability coefficient and coefficient of volume compressibility.
Mô tả: Workshop on Seismic Performance and Simulation of Pile Foundations in Liquefied and Laterally Spreading Ground March 16-18, 2005 | University of California, Davis, California, United States © 2006 American Society of Civil Engineers
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