![]() ![]() Poorer performance in compression and better performance in tension was observed in this situation. The tests’ results showed that the number of cycles leading to liquefaction of a sand–silt mixture decreases after increasing fine-grained percentage. The numerical analysis was performed by a finite difference method, and Finn’s constitutive model was applied to investigate the liquefaction resistance of the mixtures. The samples contained 0%, 10%, 20%, 30% and 40% of fine grains. The cyclic triaxial tests were conducted in stress-controlled conditions with 1 Hz frequency at 0.35 constant cyclic stress ratio for 50 kPa and 0.25 for 100 and 200 kPa confining pressures. To evaluate the effect of non-plastic fines on liquefaction resistance of Babolsar sand, a series of undrained static and cyclic triaxial tests alongside a series of numerical analysis were carried out. Permeability, CRR and secant shear modulus decreased till limiting silt content after that they became constant with increasing silt content. The cyclic resistance behavior was observed to be just opposite to the pore pressure response. ![]() The rate of generation of excess pore water pressure with respect to cycles of loading was found to initially increase with increase in silt content till the limiting silt content and thereafter it reverses its trend when the specimens were tested at a constant relative density. ![]() For a constant relative density (Dr=60%) the effect of limiting silt content, pore pressure response and cyclic strength was observed. The effect of relative density, confining pressure as well as magnitude of cyclic loading was also studied. Specimens were prepared at a constant relative density and constant density approach. These tests were conducted on specimens of size 71 mm diameter and 142 mm height with a frequency of 1 Hz. ![]() To identify the effect of non-plastic silt on the cyclic behavior of sand–silt mixtures, total sixty undrained cyclic triaxial stress-control tests were carried out on sand–silt mixtures. ![]()
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