Shear modulus from SPT N-values with different energy values

Anbazhagan, P and Kumar, A and Ingale, SG and Jha, SK and Lenin, KR (2021) Shear modulus from SPT N-values with different energy values. In: Soil Dynamics and Earthquake Engineering, 150 .

	PDF sosi_dyn_ear_eng_150_2021.pdf - Published Version Restricted to Registered users only Download (2MB) | Request a copy
	Microsoft Word 1-s2.0-S026772612100347X-mmc1.docx - Published Supplemental Material Restricted to Registered users only Download (258kB) | Request a copy

Abstract

It is essential to determine low strain shear modulus (Gmax) to model dynamic soil response and estimate the site effects due to earthquakes. Several correlations have been developed between dynamic soil properties and soil penetration resistance values such as N-values from Standard Penetration Test (SPT). However, only a few of the established correlations are often used because of uncertainty over applied hammer energy (EH) and applicability in different regions. Hence, this study aims to signify the importance of EH in N-value corrections, its influence on Gmax estimation, to suggest modification factor for an existing correlation and validate with Downhole and Crosshole measurements. Different SPT corrections are studied besides the energy measurements in the analysis of the correlation between the N-value and Gmax. A previously proposed correlation between measured N-value and Gmax is improved to account for in-situ EH measurement, and the correction factors to account for different hammer energy ratios (ER) are suggested. Modified correlations compared well and agreed within the 95 confidence bound with the freshly acquired seismic borehole tests data. © 2021 Elsevier Ltd

Item Type:	Journal Article
Publication:	Soil Dynamics and Earthquake Engineering
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd
Keywords:	Elastic moduli; Shear strain; Soil testing; Soils, Crosshole; Downholes; Energy; Energy value; Hammer energy; N value; Standard penetration test; Standard penetration test correlation; Standard penetration test N-value; Standard-penetration-test, Hammers
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	24 Sep 2021 07:56
Last Modified:	24 Sep 2021 07:56
URI:	http://eprints.iisc.ac.in/id/eprint/69738

Actions (login required)

View Item