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  4. Analysis of the effect of fines content and loading frequency on the shear modulus and damping ratio of gravels
 
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Analysis of the effect of fines content and loading frequency on the shear modulus and damping ratio of gravels
Dr. Villalobos-Jara, Felipe 
Facultad de Ingeniería 
Dorador, Leonardo
Barrera, Carolina E.
Rozas, Jorge
10.4067/S0718-28132021000200039
Obras y Proyectos
2021
The dynamic properties of coarse granular soils have been much less studied than in sands. From a database of 14 gravel samples subjected to cyclic triaxial tests, available relationships are studied and new proposed to estimate the normalised shear modulus G/Gmax and the damping ratio D as a function of shear strain γ. The effect of confining stress, fines content, uniformity coefficient and loading frequency on the variation of G/ Gmax and D versus γ is analysed. It is obtained that G/Gmax is dependent on confinement, but not on loading frequency. 85.6% of the data converge in an error band of less than 25% for the proposed formulation. The damping D does depend on fines content as well as confinement and loading frequency. The proposed formulation for D has a 56% probability of having errors less than 25%.
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0718-2813-oyp-30-0039.pdf

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5.15 MB

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Checksum
Gravels
Shear Modulus
Damping
Loading frecuency
Fines content
Historial de mejoras
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