Welcome to Ali's Geotechnical Corner, where we review research shaping the geotechnical engineering field. This week, we’re spotlighting a study published in the ASCE Journal of Geotechnical and Geoenvironmental Engineering:
Sinha, S.K., Ziotopoulou, K., and Kutter, B.L. (2023). “Displacement-Based Design of Axially Loaded Piles for Seismic Loading and Liquefaction-Induced Downdrag.”
The paper presents a novel method for evaluating the axial capacity of piles impacted by liquefiable deposits based on strains/displacements soil-structure interaction rather than stresses/forces. This new mechanistic approach considers the strain and stress distribution and redisgraytribution during and post-seismic loadings, highlighting the potential for pile capacity reduction and unforeseen settlements for piles embedded in dense sands under dynamic loadings. The proposed displacement-based approach can be easily adopted in performance-based design of structures.
The paper provides step-by-step design procedures that can be easily followed by geotechnical and/or structural engineers for evaluating the axial pile capacity under seismic loading. The design procedure was verified by centrifuge testing and explained through a detailed example problem. In summary, the paper was based on a fundamental approach that is easy to follow and practical for foundation designers.
For a deeper dive into this research and its implications, read the full paper on the ASCE website. (Here)
Stay tuned for more insights from Ali’s Geotechnical Corner, where we continue exploring cutting-edge ideas and solutions shaping the industry.
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