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Nonlinear Analysis of Soil Pile Interaction Under Seismic Loads
Due to randomness of seismic load, it is difficult to predict the complexity of the soil pile and their system. The nonlinear behaviour of the soil and the liquefaction phenomenon occurring during the events of earthquake is the reason why the seismic response of structures supported on a pile foundation is considered extremely complex. The soil-pile interaction is of paramount importance for designing and conducting seismic analysis, so that this topic has been studied widely. In this study, a robust nonlinear FEM 3D model (approximate method) is described for seismic analysis of soil-pile interaction, where. OpenSees software package has been used. Stiffness and damping of the pile foundation are generated from OpenSees by using Tcl programming language code. The seismic response of a soil pile interaction is examined in a moderate seismic zone, including response spectrum analysis and time history analysis. To illustrate the effects of soil-pile interaction on the seismic response of the system, two different base conditions are considered, rigid base, i.e., no deformation of the foundation and nonlinear soil-pile system. Seismic response of the soil-pile interaction in terms of displacement and acceleration amplification profiles, nonlinear stress–strain behaviour, pore water pressure, and potential of liquefaction are explained and examined. A notable amplification in the accelerations was seen between the base and surface of the soil domain ranging from 2.09 to 14.9 (mean, 8.5). A huge amplification in the horizontal as well as vertical displacement near the ground surface is also observed with values up to 0.0028 m and 0.0265 m, respectively, in soil domain, whereas in soil + pile domain, the observations are 0.0028 m and 0.00175 m, respectively. The soil, soil + pile domain, is found to be not susceptible to liquefaction for a typical motion considered in the study.
Nonlinear Analysis of Soil Pile Interaction Under Seismic Loads
Due to randomness of seismic load, it is difficult to predict the complexity of the soil pile and their system. The nonlinear behaviour of the soil and the liquefaction phenomenon occurring during the events of earthquake is the reason why the seismic response of structures supported on a pile foundation is considered extremely complex. The soil-pile interaction is of paramount importance for designing and conducting seismic analysis, so that this topic has been studied widely. In this study, a robust nonlinear FEM 3D model (approximate method) is described for seismic analysis of soil-pile interaction, where. OpenSees software package has been used. Stiffness and damping of the pile foundation are generated from OpenSees by using Tcl programming language code. The seismic response of a soil pile interaction is examined in a moderate seismic zone, including response spectrum analysis and time history analysis. To illustrate the effects of soil-pile interaction on the seismic response of the system, two different base conditions are considered, rigid base, i.e., no deformation of the foundation and nonlinear soil-pile system. Seismic response of the soil-pile interaction in terms of displacement and acceleration amplification profiles, nonlinear stress–strain behaviour, pore water pressure, and potential of liquefaction are explained and examined. A notable amplification in the accelerations was seen between the base and surface of the soil domain ranging from 2.09 to 14.9 (mean, 8.5). A huge amplification in the horizontal as well as vertical displacement near the ground surface is also observed with values up to 0.0028 m and 0.0265 m, respectively, in soil domain, whereas in soil + pile domain, the observations are 0.0028 m and 0.00175 m, respectively. The soil, soil + pile domain, is found to be not susceptible to liquefaction for a typical motion considered in the study.
Nonlinear Analysis of Soil Pile Interaction Under Seismic Loads
Lecture Notes in Civil Engineering
Muthukkumaran, Kasinathan (editor) / Ayothiraman, R. (editor) / Kolathayar, Sreevalsa (editor) / Siri Reddy, K. (author) / Harini, G. V. S. K. (author) / Vijayasri, Thanikella (author)
Indian Geotechnical Conference ; 2021 ; Trichy, India
Soil Dynamics, Earthquake and Computational Geotechnical Engineering ; Chapter: 30 ; 347-363
2023-01-01
17 pages
Article/Chapter (Book)
Electronic Resource
English
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