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Earthquakes and Structures Volume 24, Number 6, June 2023 , pages 455-475 DOI: https://doi.org/10.12989/eas.2023.24.6.455 |
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Seismic performance assessment of single pipe piles using three-dimensional finite element modeling considering different parameters |
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Duaa Al-Jeznawi, Jitendra Khatti, Musab Aied Qissab Al-Janabi, Kamaldeep Singh Grover,
Ismacahyadi Bagus Mohamed Jais, Bushra S Albusoda and Norazlan Khalid
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| Abstract | ||
| The present study investigates the non-linear soil-pile interaction using three-dimensional (3D) non-linear finite element models. The numerical models were validated by using the results of extensive pile load and shaking table tests. The pile performance in liquefiable and non-liquefiable soil has been studied by analyzing the liquefaction ratio, pile lateral displacement (LD), pile bending moment (BM), and frictional resistance (FR) results. The pile models have been developed for the different ground conditions. The study reveals that the results obtained during the pile load test and shaking cycles have good agreement with the predicted pile and soil response. The soil density, peak ground acceleration (PGA), slenderness ratio (L/D), and soil condition (i.e., dry and saturated) are considered during modeling. Four ground motions are used for the non-linear time history analyses. Consequently, design charts are proposed depended on the analysis results to be used for design practice. Eleven models have been used to validate the capability of these charts to capture the soil-pile response under different seismic intensities. The results of the present study demonstrate that L/D ratio slightly affects the lateral displacement when compared with other parameters. Also, it has been observed that the increasing in PGA and decreasing L/D decreases the excess pore water pressure ratio; i.e., increasing PGA from 0.1 g to 0.82 g of loose sand model, decrease the liquefaction ratio by about 50%, and increasing L/D from 15 to 75 of the similar models (under Kobe earthquake), increase this ratio by about 30%. This study reveals that the lateral displacement increases nonlinearly under both dry and saturated conditions as the PGA increases. Similarly, it is observed that the BM increases under both dry and saturated states as the L/D ratio increases. Regarding the acceleration histories, the pile BM was reduced by reducing the acceleration intensity. Hence, the pile BM decreased to about 31% when the applied ground motion switched from Kobe (PGA=0.82 g) to Ali Algharbi (PGA=0.10 g). This study reveals that the soil conditions affect the relationship pattern between the FR and the PGA. Also, this research could be helpful in understanding the threat of earthquakes in different ground characteristics. | ||
| Key Words | ||
| finite element models; peak ground acceleration; seismic response; slenderness ratio; soil-pile interaction; soil characteristics | ||
| Address | ||
| Musab Aied Qissab Al-Janabi: Department of Civil Engineering, College of Engineering, Al-Nahrain University, Baghdad, Iraq Norazlan Khalid: School of Civil Engineering, College of Engineering, Universiti Teknologi MARA Shah Alam Jitendra Khatti and Kamaldeep Singh Grover: Department of Civil Engineering, Rajasthan Technical University, Kota, Rajasthan, India Ismacahyadi Bagus Mohamed Jais: Institute for Infrastructure Engineering and Sustainable Management, School of Civil Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam Bushra S Albusoda: Department of Civil Engineering, University of Baghdad, Iraq Duaa Al-Jeznawi: 1) Department of Civil Engineering, College of Engineering, Al-Nahrain University, Baghdad, Iraq, 2) School of Civil Engineering, College of Engineering, Universiti Teknologi MARA Shah Alam | ||