NIE Qing-ke, BAI Bing, HU Jian-min, et al. The pore pressure model and undrained shear strength of soft clay under cyclic loading[J]. 2007, 28(S1).DOI:
The developments of pore pressure and axial deformation of undisturbed samples are studied by cyclic axial shear tests. A model for predicting the evolution of pore pressure under cyclic shear loading is proposed. The dynamic shear strength under undrained cyclic shear conditions is determined
and the degradation characteristics of undrained monotonic shear strength after cyclic loading are also analyzed. The effects of confining pressure and the frequency of cyclic loading on dynamic shear strength are studied. Studies show that
under a definite axial strain
the cyclic numbers decreases notably with the increase in cyclic stress ratio. Besides
the static undrained shear strength is degraded with the increase in cyclic stress ratio.