A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Response analysis of single pile embedded in saturated sand under bidirectional cyclic loading
https://orcid.org/0000-0001-9366-0267
Abstract In this study, the dynamic responses of a single pile in liquefiable sand under bidirectional loading are investigated using fully coupled three-dimensional nonlinear finite element analyses. A multi-surface plasticity model is adopted to simulate the liquefiable sand behaviour. The analysis procedures elaborate the bidirectional shaking patterns of 2-D linear, circular, and oval shape simultaneously. Results reveal that compared to the unidirectional loading, the bidirectional loading reduces the soil liquefaction resistance and increases the depth of liquefied soil layer. The results also showed that the phase difference between orthogonal components of base excitation and the frequency content of the input motion have a significant impact on the dynamic responses of soil and pile. In addition, an increase in the phase difference reduces the excess pore water pressure and the thickness of liquefied layer, and delays the liquefaction occurrence. Moreover, the maximum pile bending moment and its location correspond to the dominance of either inertia or kinematic interaction forces, which are primarily influenced by the frequency content of input motion.
Highlights Dynamic response of single pile embedded in liquefiable sand is investigated through a 3D nonlinear finite element model. Seismic performance of soil-pile systems under unidirectional and bidirectional loadings is studied. Soil-pile response is remarkably influenced by the pattern of bidirectional loading and its frequency content. The frequency content of input motion has a decisive effect on the maximum pile bending moment.
Response analysis of single pile embedded in saturated sand under bidirectional cyclic loading
https://orcid.org/0000-0001-9366-0267
Abstract In this study, the dynamic responses of a single pile in liquefiable sand under bidirectional loading are investigated using fully coupled three-dimensional nonlinear finite element analyses. A multi-surface plasticity model is adopted to simulate the liquefiable sand behaviour. The analysis procedures elaborate the bidirectional shaking patterns of 2-D linear, circular, and oval shape simultaneously. Results reveal that compared to the unidirectional loading, the bidirectional loading reduces the soil liquefaction resistance and increases the depth of liquefied soil layer. The results also showed that the phase difference between orthogonal components of base excitation and the frequency content of the input motion have a significant impact on the dynamic responses of soil and pile. In addition, an increase in the phase difference reduces the excess pore water pressure and the thickness of liquefied layer, and delays the liquefaction occurrence. Moreover, the maximum pile bending moment and its location correspond to the dominance of either inertia or kinematic interaction forces, which are primarily influenced by the frequency content of input motion.
Highlights Dynamic response of single pile embedded in liquefiable sand is investigated through a 3D nonlinear finite element model. Seismic performance of soil-pile systems under unidirectional and bidirectional loadings is studied. Soil-pile response is remarkably influenced by the pattern of bidirectional loading and its frequency content. The frequency content of input motion has a decisive effect on the maximum pile bending moment.
Response analysis of single pile embedded in saturated sand under bidirectional cyclic loading
https://orcid.org/0000-0001-9366-0267
Abstract In this study, the dynamic responses of a single pile in liquefiable sand under bidirectional loading are investigated using fully coupled three-dimensional nonlinear finite element analyses. A multi-surface plasticity model is adopted to simulate the liquefiable sand behaviour. The analysis procedures elaborate the bidirectional shaking patterns of 2-D linear, circular, and oval shape simultaneously. Results reveal that compared to the unidirectional loading, the bidirectional loading reduces the soil liquefaction resistance and increases the depth of liquefied soil layer. The results also showed that the phase difference between orthogonal components of base excitation and the frequency content of the input motion have a significant impact on the dynamic responses of soil and pile. In addition, an increase in the phase difference reduces the excess pore water pressure and the thickness of liquefied layer, and delays the liquefaction occurrence. Moreover, the maximum pile bending moment and its location correspond to the dominance of either inertia or kinematic interaction forces, which are primarily influenced by the frequency content of input motion.
Highlights Dynamic response of single pile embedded in liquefiable sand is investigated through a 3D nonlinear finite element model. Seismic performance of soil-pile systems under unidirectional and bidirectional loadings is studied. Soil-pile response is remarkably influenced by the pattern of bidirectional loading and its frequency content. The frequency content of input motion has a decisive effect on the maximum pile bending moment.
Response analysis of single pile embedded in saturated sand under bidirectional cyclic loading
Abbasi, H. (author) / Binesh, S.M. (author) / El Naggar, M.H. (author)
2023-01-02
Article (Journal)
Electronic Resource
English
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3D Numerical Response of a Single Pile Under Uplift Loading Embedded in Sand
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