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Nonlinear Dynamic Analysis of Laterally Loaded Piles in Liquefiable Layered Sloping Ground under the Influence of Axial Loading
https://orcid.org/http://orcid.org/0000-0002-7037-7407
Dynamic response of soil–pile system in liquefiable layered sloping ground under the effect of static axial load as well as ground motions simultaneously is an issue of utmost importance. The present study is performed using an advanced nonlinear finite element-based 3D numerical model for filling up this research gap. Two typical soil profiles of Kolkata city such as Normal Kolkata Deposit and River Channel Deposit (RCD) have been chosen for this study. The input motions considered for present analysis are 1940 Imperial Valley and 2001 Bhuj earthquakes. Multi-yield surface plasticity model is adopted to incorporate soil nonlinearity. Fully coupled u-p formulation is used to simulate pore water pressure generation because of soil–fluid interaction. The applicability of the present numerical model is verified using the past experimental works. Then, parametric study has been conducted to evaluate the effect of different vital parameters on dynamic response of soil–pile system. It is observed that the residual soil displacement in RCD soil increases with an increase in ground slopes indicating liquefaction-induced lateral spreading. Parametric studies also showed that the amplification factors of bending moment for sloping ground with respect to level ground due kinematic and combined loading are 3.50, 5.50, 6.75 and 1.09, 1.13, 1.18 for 2.5-, 5.0- and 10.0-degree ground slopes, respectively. The combined peak lateral displacement and bending moment coefficient decrease by 62.60% and 44.20%, respectively, when slenderness ratio decreases from 42 to 21. Also, the peak combined lateral displacement decreases by 48.7% and combined bending moment coefficient increases by 14.3% when soil condition changes from liquefiable state to dry condition. Finally, bending–buckling interaction diagram is presented for safe and economical designing of piles in liquefiable sloping ground under combined loading condition.
Nonlinear Dynamic Analysis of Laterally Loaded Piles in Liquefiable Layered Sloping Ground under the Influence of Axial Loading
https://orcid.org/http://orcid.org/0000-0002-7037-7407
Dynamic response of soil–pile system in liquefiable layered sloping ground under the effect of static axial load as well as ground motions simultaneously is an issue of utmost importance. The present study is performed using an advanced nonlinear finite element-based 3D numerical model for filling up this research gap. Two typical soil profiles of Kolkata city such as Normal Kolkata Deposit and River Channel Deposit (RCD) have been chosen for this study. The input motions considered for present analysis are 1940 Imperial Valley and 2001 Bhuj earthquakes. Multi-yield surface plasticity model is adopted to incorporate soil nonlinearity. Fully coupled u-p formulation is used to simulate pore water pressure generation because of soil–fluid interaction. The applicability of the present numerical model is verified using the past experimental works. Then, parametric study has been conducted to evaluate the effect of different vital parameters on dynamic response of soil–pile system. It is observed that the residual soil displacement in RCD soil increases with an increase in ground slopes indicating liquefaction-induced lateral spreading. Parametric studies also showed that the amplification factors of bending moment for sloping ground with respect to level ground due kinematic and combined loading are 3.50, 5.50, 6.75 and 1.09, 1.13, 1.18 for 2.5-, 5.0- and 10.0-degree ground slopes, respectively. The combined peak lateral displacement and bending moment coefficient decrease by 62.60% and 44.20%, respectively, when slenderness ratio decreases from 42 to 21. Also, the peak combined lateral displacement decreases by 48.7% and combined bending moment coefficient increases by 14.3% when soil condition changes from liquefiable state to dry condition. Finally, bending–buckling interaction diagram is presented for safe and economical designing of piles in liquefiable sloping ground under combined loading condition.
Nonlinear Dynamic Analysis of Laterally Loaded Piles in Liquefiable Layered Sloping Ground under the Influence of Axial Loading
https://orcid.org/http://orcid.org/0000-0002-7037-7407
Dynamic response of soil–pile system in liquefiable layered sloping ground under the effect of static axial load as well as ground motions simultaneously is an issue of utmost importance. The present study is performed using an advanced nonlinear finite element-based 3D numerical model for filling up this research gap. Two typical soil profiles of Kolkata city such as Normal Kolkata Deposit and River Channel Deposit (RCD) have been chosen for this study. The input motions considered for present analysis are 1940 Imperial Valley and 2001 Bhuj earthquakes. Multi-yield surface plasticity model is adopted to incorporate soil nonlinearity. Fully coupled u-p formulation is used to simulate pore water pressure generation because of soil–fluid interaction. The applicability of the present numerical model is verified using the past experimental works. Then, parametric study has been conducted to evaluate the effect of different vital parameters on dynamic response of soil–pile system. It is observed that the residual soil displacement in RCD soil increases with an increase in ground slopes indicating liquefaction-induced lateral spreading. Parametric studies also showed that the amplification factors of bending moment for sloping ground with respect to level ground due kinematic and combined loading are 3.50, 5.50, 6.75 and 1.09, 1.13, 1.18 for 2.5-, 5.0- and 10.0-degree ground slopes, respectively. The combined peak lateral displacement and bending moment coefficient decrease by 62.60% and 44.20%, respectively, when slenderness ratio decreases from 42 to 21. Also, the peak combined lateral displacement decreases by 48.7% and combined bending moment coefficient increases by 14.3% when soil condition changes from liquefiable state to dry condition. Finally, bending–buckling interaction diagram is presented for safe and economical designing of piles in liquefiable sloping ground under combined loading condition.
Nonlinear Dynamic Analysis of Laterally Loaded Piles in Liquefiable Layered Sloping Ground under the Influence of Axial Loading
Indian Geotech J
Mallick, Monirul (author) / Mandal, Kalyan Kumar (author) / Sahu, Ramendu Bikas (author)
Indian Geotechnical Journal ; 54 ; 1286-1309
2024-08-01
24 pages
Article (Journal)
Electronic Resource
English
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