Effect of the loading frequency on the sand liquefaction behaviour in cyclic triaxial tests

This study was aimed at highlighting the effect of loading frequency on sand liquefaction response by performing cyclic triaxial tests in both stress-controlled and strain-controlled modes. For first case, dense (IDmat = 0.70) medium-dense 0.55) specimens were subjected to alternative non-alternative axial stresses; whilst strain over a wide range frequencies second case. It experimentally found that case for test with IDmat 0.70 mode, not notable dry specimens. In contrast, significant saturated because, upon shearing, transient deformation occurred presence excess pore water pressure, during which inertia force needed be taken into account. direction, opposing external certainly increased resistance suppressing complete development liquefaction. As mode 0.55, played vital role pure extensional loading, could also logically attributed appearing large stages. However, compressive pattern unclear due following two reasons: (i) lateral direction appeared form enhancing confinement, thereby impeding relative sliding; (ii) rearrangement grains more stable direction. These aspects provided beneficial contribution resistance, preventing occurrence deformation. Under circumstance, deformed only moderately, eliminating need consider frequency.