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A Suggestion of an Empirical Equation for Shear Modulus Reduction Curve Estimation of Sandy Soils  

Park, Dug-Keun (Member, Senior Analyst, National Institute for Disaster Prevention, Ministry of Government Administration and Home Affairs)
Publication Information
Journal of the Korean Geotechnical Society / v.18, no.3, 2002 , pp. 127-138 More about this Journal
Abstract
In dynamic analyses such as seismic ground response and soil-structure interaction problems, it is very crucial to obtain accurate dynamic shear modulus of soil deposit. In this study, an extensive data base of available experimental data is compiled and reanalyzed to establish a simple empirical formula for the dynamic shear modulus reduction curve to cover wide range of strain for sandy soils. The proposed empirical equation is to represent the dynamic shear modulus degradation with strain in terms of low-amplitude dynamic shear modulus and effective mean confining Pressure, since those factors have the most significant effect on the Position and shape of the shear modulus reduction curve for nonelastic soils. If low-amplitude shear modulus is measured, degraded modulus at any shear strain amplitude can be calculated using the proposed equation.
Keywords
Dynamic shear modulus; Effective mean confining pressure; Empirical equation; Modulus reduction curve; Sandy soils;
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