Model studies on the influence of gradation of sand in free field liquefaction

Varghese, RM and Latha, GM (2019) Model studies on the influence of gradation of sand in free field liquefaction. In: 7th International Conference on Earthquake Geotechnical Engineering, 17-20 Jan 2019, Rome, Italy, pp. 5498-5505.

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Abstract

The present study was conducted to find the influence of gradation of sand on initiation of liquefaction in free field conditions. Sands with two different gradations were subjected to dynamic loading and the development of pore water pressure at different locations was monitored. Acceleration and frequency of base shaking were varied and the results showed that fine graded sands were more susceptible to liquefaction at higher frequencies compared to coarse grained sands. The accelerometer response at different depths showed that acceleration amplifications were more prominent in case of coarse-grained sands due to flow liquefaction. In case of fine-grained sands, liquefaction was associated with higher initial settlements and acceleration amplifications were less because the sand beds got densified during initial shaking cycles. It was also observed that the liquefaction response of finer sand was found to be depended on the input frequency to a large extent compared to the coarser sand. © 2019 Associazione Geotecnica Italiana, Rome, Italy.

Item Type:	Conference Paper
Publication:	Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019
Publisher:	CRC Press/Balkema
Additional Information:	The copyright of this article belongs to CRC Press/Balkema
Keywords:	Dynamic loads; Earthquakes; Geotechnical engineering; Liquefaction, Different gradations; Dynamic loadings; Fine-grained sand; Flow liquefaction; Free field conditions; Higher frequencies; Initial settlement; Pore-water pressures, Sand
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	06 Apr 2021 11:05
Last Modified:	06 Apr 2021 11:05
URI:	http://eprints.iisc.ac.in/id/eprint/64920

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