Geomechanics and Engineering

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Nonlinear numerical analysis of influence of pile inclination on the seismic response of soil-pile-structure system

  • Lina Jaber (Department of Civil Engineering, Beirut Arab University) ;
  • Reda Mezeh (Univ. Lille, IMT Lille Douai, Univ. Artois) ;
  • Zeinab Zein (Department of Civil Engineering, Beirut Arab University) ;
  • Marc Azab (College of Engineering and Technology, American University of the Middle East) ;
  • Marwan Sadek (Univ. Lille, IMT Lille Douai, Univ. Artois)
  • Received : 2022.03.04
  • Accepted : 2023.07.17
  • Published : 2023.08.25
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Abstract

Inclined piles are commonly used in civil engineering constructions where significant lateral resistance is required. Many researchers proved their positive performance on the seismic behavior of the supported structure and the piles themselves. However, most of these numerical studies were done within the framework of linear elastic or elastoplastic soil behavior, neglecting therefore the soil non-linearity at low and moderate soil strains which is questionable and could be misleading in dynamic analysis. The main objective of this study is to examine the influence of the pile inclination on the seismic performance of the soil-pile-structure system when both the linear elastic and the nonlinear soil models are employed. Based on the comparative responses, the adequacy of the soil's linear elastic behavior will be therefore evaluated. The analysis is conducted by generating a three-dimensional finite difference model, where a full interaction between the soil, structure, and inclined piles is considered. The numerical survey proved that the pile inclination can have a significant impact on the internal forces generated by seismic activity, specifically on the bending moment and shear forces. The main disadvantages of using inclined piles in this system are the bending forces at the head and pile-to-head connection. It is crucial to account for soil nonlinearity to accurately assess the seismic response of the soil-pile-structure system.

Keywords

References

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