Location

San Diego, California

Session Start Date

3-26-2001

Session End Date

3-31-2001

Abstract

Shear wave velocity vs, dynamic shear modulus Gmax, and damping characteristics are important parameters required for both static and dynamic response analyses of earth structures. Traditional indirect methods for estimation of these parameters based on void ratio, relative density, and mean effective stress have been successful for rather narrowly graded soils, but not for the most commonly found silty and gravelly soils. Their direct application to determine the above characteristics for silty and gravely soils are not satisfactory. A primary reason for this is that global void ratio is not a good measure of intergrain contact density for granular mixes. A simple array of two-sized particle system with large size disparity is presented to highlight the relative roles of intercoarser and interfiner grain contacts on mechanical response parameters of such granular mixes. New parameters, namely equivalent intergranular void ratio (ec)eq, and equivalent interfine void ratio (ef)eq are introduced as indices of active intergrain contacts. They are related to shear modulus and vs of silty and gravely soils.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fourth Conference

Publisher

University of Missouri--Rolla

Publication Date

3-26-2001

Document Version

Final Version

Rights

© 2001 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Mar 26th, 12:00 AM Mar 31st, 12:00 AM

Shear Wave Velocity Relations for Silty and Gravely Soils

San Diego, California

Shear wave velocity vs, dynamic shear modulus Gmax, and damping characteristics are important parameters required for both static and dynamic response analyses of earth structures. Traditional indirect methods for estimation of these parameters based on void ratio, relative density, and mean effective stress have been successful for rather narrowly graded soils, but not for the most commonly found silty and gravelly soils. Their direct application to determine the above characteristics for silty and gravely soils are not satisfactory. A primary reason for this is that global void ratio is not a good measure of intergrain contact density for granular mixes. A simple array of two-sized particle system with large size disparity is presented to highlight the relative roles of intercoarser and interfiner grain contacts on mechanical response parameters of such granular mixes. New parameters, namely equivalent intergranular void ratio (ec)eq, and equivalent interfine void ratio (ef)eq are introduced as indices of active intergrain contacts. They are related to shear modulus and vs of silty and gravely soils.