Numerical Simulation of Piles in a Liquefied Slope Using a Modified Soil–Pile Interface Model

The liquefaction of soil surrounding a pile significantly affects the dynamic interaction between the soil and the pile. In particular, liquefaction of the sloping ground can induce permanent deformation and a bending moment on the pile due to the lateral displacement of the liquefied soil in the do...

Full description

Saved in:
Bibliographic Details
Published in:Applied sciences 2023-05, Vol.13 (11), p.6626
Main Authors: Yoo, Byeong-Soo, Tran, Nghiem Xuan, Kim, Sung-Ryul
Format: Article
Language:English
Subjects:
Analysis
Bending moments
centrifuge test
Centrifuges
Deformation
earthquake
Friction
Interfacial friction angle
Lateral displacement
Liquefaction
Load
Mathematical models
Mechanical properties
Numerical analysis
numerical simulation
Pore pressure
Pore water pressure
Pressure ratio
Simulation
Simulation methods
slope
Soil dynamics
Soils
soil–pile interface
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The liquefaction of soil surrounding a pile significantly affects the dynamic interaction between the soil and the pile. In particular, liquefaction of the sloping ground can induce permanent deformation and a bending moment on the pile due to the lateral displacement of the liquefied soil in the downslope direction. However, numerical analysis studies on piles installed in a liquefiable slope have been very limited and have not properly simulated the behavior of the pile. Therefore, a modified soil–pile interface model was proposed, which linearly decreases the interface friction angle with the increase in the excess pore pressure ratio. The proposed model was validated by comparing it with the centrifuge test results of Yoo et al. (2023). Simulation results on the slope crest settlement and the pile-bending moment showed good agreement with the centrifuge test results. A parametric study was conducted by applying the validated model to analyze the effect of slope inclinations and the amplitude of input motions on the slope displacement and the pile moment. The simulation results showed that the slope inclinations affected the area of the sliding mass, causing a larger pile-bending moment with a larger inclination. When the amplitude of the input motion was sufficiently large to trigger the failure of the liquefied slope, the slope displacement and the pile-bending moment did not increase any further.
ISSN:2076-3417
2076-3417
DOI:10.3390/app13116626