Dynamic Properties of Surface Liquefied Site Silty-Sand of Tripura, India

Mog, K and Anbazhagan, P (2019) Dynamic Properties of Surface Liquefied Site Silty-Sand of Tripura, India. In: 2nd GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt 2018 - The official international congress of the Soil-Structure Interaction Group in Egypt, SSIGE 2018, 24 November 2018 - 28 November 2018, Cairo, pp. 140-154.

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Abstract

Due to increase in the rate of occurrence of earthquakes and associated damages, site-specific dynamic models are attracted to research in the recent past. The shear modulus degradation curve, damping characteristics and shear wave velocity profile are indispensable input properties required for carrying out the site response analysis. However, most of the site response studies are being carried out using existing dynamic model developed for generic soil. In the present study, results of resonant column and cyclic triaxial tests on reconstituted dry silty-sands specimens obtained from the recently liquefied site of Tripura, India is presented. The shear modulus degradation curve and damping ratio for a low (<10−3) to high strain range (up to 5%) are presented and compared with the available well-known curves and discussed. Also, the effects of confining pressure and relative density on dynamic properties are presented. Further, comparison has been made between the shear wave velocity measured in the liquefied field using Multichannel Analysis of Surface Waves (MASW) and laboratory results of low strain shear wave velocity. These results can be used for amplification estimation or micro-zonation studies in Tripura.

Item Type:	Conference Paper
Publication:	Sustainable Civil Infrastructures
Publisher:	Springer Science and Business Media B.V.
Additional Information:	The copyright for this article belongs to Springer Science and Business Media B.V.
Keywords:	Acoustic wave velocity; Damping; Dynamic models; Elastic moduli; Piles; Sand; Seismic response; Shear strain; Shear waves; Soil structure interactions; Soil testing; Soils; Surface waves; Wave propagation, Confining pressures; Cyclic tri-axial tests; Damping characteristics; Modulus degradation; Multi-channel analysis of surface waves; Relative density; Shear wave velocity; Site response analysis, Shear flow
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	29 Nov 2022 09:43
Last Modified:	29 Nov 2022 09:43
URI:	https://eprints.iisc.ac.in/id/eprint/78113

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