Abstract
The economic benefits of utilizing numerical simulations versus experimental approaches in geotechnical studies have made them viable tools for engineering assessments. Within this framework, the damages due to earthquake-induced forces and displacements in liquefied ground are amongst the phenomena investigated by many researchers. In the current study, numerical simulation of mildly-sloping liquefied ground under dynamic loading is conducted by the graphical user interface OpenSeesPL, which uses the open-source computational platform OpenSees. Pile-pinning lateral displacement mitigation method in saturated sand is modeled and the effects of artificial earthquake time histories covering a range of different durations and frequency contents on the system response are scrutinized. It is observed that duration and frequency content of the earthquakes changed the initiation time of large deformations. Higher pore pressures were generated in low frequency systems and larger lateral displacements of the improved ground with loose soil were countered with lower accelerations due to the liquefied ground isolating effects. The reliability of different intensity measures for enabling seismic performance assessments are discussed and finally, recommendations for practical hazard evaluations are made.
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Acknowledgements
The authors would like to express sincere gratitude to Dr. Jinchi Lu, associate project scientist at University of California San Diego for his invaluable help during this study. The constructive comments by anonymous reviewers of the manuscript are hereby gratefully acknowledged.
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Panaghi, K., Mahboubi, A. & Mahdavian, A. The effect of earthquake motion characteristics on potentially liquefiable pile-pinned sloping ground. Bull Earthquake Eng 17, 1891–1917 (2019). https://doi.org/10.1007/s10518-018-00529-5
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DOI: https://doi.org/10.1007/s10518-018-00529-5