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Importance of Site-Specific Dynamic Soil Properties for Seismic Ground Response Studies: Ground Response Analysis

Importance of Site-Specific Dynamic Soil Properties for Seismic Ground Response Studies: Ground Response Analysis

Shiv Shankar Kumar, Arindam Dey, A. Murali Krishna
Copyright: © 2018 |Volume: 9 |Issue: 1 |Pages: 21
ISSN: 1947-8488|EISSN: 1947-8496|EISBN13: 9781522544708|DOI: 10.4018/IJGEE.2018010105
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MLA

Kumar, Shiv Shankar, et al. "Importance of Site-Specific Dynamic Soil Properties for Seismic Ground Response Studies: Ground Response Analysis." IJGEE vol.9, no.1 2018: pp.78-98. http://doi.org/10.4018/IJGEE.2018010105

APA

Kumar, S. S., Dey, A., & Krishna, A. M. (2018). Importance of Site-Specific Dynamic Soil Properties for Seismic Ground Response Studies: Ground Response Analysis. International Journal of Geotechnical Earthquake Engineering (IJGEE), 9(1), 78-98. http://doi.org/10.4018/IJGEE.2018010105

Chicago

Kumar, Shiv Shankar, Arindam Dey, and A. Murali Krishna. "Importance of Site-Specific Dynamic Soil Properties for Seismic Ground Response Studies: Ground Response Analysis," International Journal of Geotechnical Earthquake Engineering (IJGEE) 9, no.1: 78-98. http://doi.org/10.4018/IJGEE.2018010105

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Abstract

This article highlights the implication of site-specific properties on seismic ground response studies. One-dimensional equivalent linear ground response analysis was carried out using site-specific dynamic properties of locally available soils of Guwahati city, and the results are compared with those obtained using existing strain-dependent dynamic properties. Acceleration time histories from three strong motions were used. It was observed that an input motion having a higher peak bedrock acceleration, utilizing experimentally obtained dynamic soil properties, exhibits 38% and 24% lower peak ground acceleration and peak spectral acceleration, respectively, in comparison to the results obtained using standard VD-SI soil models. The amplification characteristics of the strong motions are observed to be significantly influenced by the degradation of damping ratio beyond 1% shear strain. The results highlight the necessity of conducting GRA of any region considering its regional dynamic soil properties to obtain more realistic outcomes.

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