Surface foundation subjected to strike-slip faulting on dense sand: centrifuge testing versus numerical analysis

Géotechnique ◽  
2021 ◽  
pp. 1-58
Author(s):  
Athanasios Agalianos ◽  
Evangelia Korre ◽  
Tarek Abdoun ◽  
Ioannis Anastasopoulos
Keyword(s):  
Numerical Analysis ◽  
Strike Slip ◽  
Dense Sand ◽  
Centrifuge Testing ◽  
Surface Foundation

scholarly journals Evaluation of p-y Curves and p-multiplier of Pile Groups Corresponding to Sand Properties Change Based on 3D Numerical Analysis

2020 ◽  
Vol 20 (4) ◽  
pp. 207-217
Author(s):  
Yongjin Choi ◽  
Jaehun Ahn
Keyword(s):  
Numerical Analysis ◽  
Soil Properties ◽  
Pile Group ◽  
Friction Angle ◽  
Dominant Factor ◽  
Group Effect ◽  
Pile Groups ◽  
Dense Sand ◽  
Laterally Loaded Pile ◽  
Laterally Loaded

The <i>p-y</i> curve method and </i>p</i>-multiplier (<i>P<sub>m</sub></i>), which implies a group effect, are widely used to analyze the nonlinear behaviors of laterally loaded pile groups. Factors affecting <i>P<sub>m</sub></i> includes soil properties as well as group pile geometry and configuration. However, research on the change in <i>P<sub>m</sub></i> corresponding to soil properties has not been conducted well. In this study, in order to evaluate the effect of soil properties on the group effect in a laterally-loaded pile group installed in sandy soil, numerical analysis for a single pile and 3×3 pile group installed in loose, medium, and dense sand, was performed using the 3D numerical analysis program, Plaxis 3D. Among the factors considered in this study, the column location of the pile was the most dominant factor for <i>P<sub>m</sub></i>. The effect of the sand property change on <i>P<sub>m</sub></i> was not as significant as that of the column location of the pile. However, as the sand became denser and the friction angle increased, the group effect increased, leading to a decrease in <i>P<sub>m</sub></i> of approximately 0.1. This trend was similar to the result reported in a previous laboratory-scale experimental study.

scholarly journals Centrifuge Testing of Circular and Rectangular Embedded Structures with Base Excitations

2019 ◽  
Vol 35 (3) ◽  
pp. 1485-1505
Author(s):  
Elnaz Esmaeilzadeh Seylabi ◽  
Eva Agapaki ◽  
Dimitris Pitilakis ◽  
Scott Brandenberg ◽  
Jonathan P. Stewart ◽  
...  
Keyword(s):  
Design Method ◽  
Shaking Table ◽  
Flexible Pipe ◽  
Dense Sand ◽  
Centrifuge Testing ◽  
Wave Velocities ◽  
Shear Wave Velocities ◽  
Embedded Structures ◽  
Lateral Displacements ◽  
Experimental Findings

We present data and metadata from a centrifuge testing program that was designed to investigate the seismic responses of buried circular and rectangular culverts. The specimen configurations were based on Caltrans Standard Plans, and the scope of research was to compare the experimental findings with the design method described in the NCHRP Report 611 as well as to formulate preliminary recommendations for Caltrans practice. A relatively flexible pipe and a stiff box-shaped specimen embedded in dense sand were tested in the centrifuge at the Center for Geotechnical Modeling at University of California, Davis and were subjected to a set of broadband and harmonic input motions. Responses were recorded in the soil and in the embedded structures using a dense array of instruments. Measured quantities included specimen accelerations, bending strains, and hoop strains; soil accelerations, shear-wave velocities, settlements, and lateral displacements; and accelerations of the centrifuge's shaking table. This data paper describes the tests and summarizes the generated data, which are archived at DesignSafe.ci.org (DOI: 10.17603/DS2XW9R) and are accessible through an interactive Jupyter notebook.

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