Comparison of analysis methods for soil-pile-structure interaction during earthquake conditions

Date

2025-8-13

Author

Erbaş, Mert

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Pile foundations are widely used in modern engineering practice. Numerous methods have been proposed and practices to ensure reliable and accurate analysis of earthquake response of pile foundations. In this study, three different analysis methods that are suggested in Turkish Building Earthquake Code are applied to various imaginary example cases and the results are compared to each other’s. Furthermore, some Modified approaches are also recommended for the implementation of these methods. The comparison of methods is made according to the internal forces and moment reaction of the piles. Additionally, using Normalized Root Mean Square Error method, the error margins of each method approach for each pile row and internal force are calculated. Method – I: direct analysis method is assumed to provide correct outputs since it includes all the system components in single model and the other methods are evaluated according to the results of this model. The accuracy of methods varies depending on the internal force type, particularly between axial force and the shear–moment pair. A Modified approach of Method – I: substructure analysis method, which is suggested in this study, provides satisfactory results for moment and shear behavior in both loose sand and soft clay. Different approaches of Method – I are reliable for axial force estimations in loose sand depending on the building height. On the other hand, for the cases with soft clay profile, Method – II estimates all internal force types quite well in all cases.

Subject Keywords

Direct analysis method, Substructure analysis method, Kinematic interaction, Inertial interaction

URI

https://hdl.handle.net/11511/115565

Collections

Graduate School of Natural and Applied Sciences, Thesis