Abstract Theme: Soil and Rock Mechanics Anisotropic behavior of marine clay subjected to monotonic loading Banerjee, S# and Balaji, P* # Assistant Professor, Indian institute of Technology-Madras, Chennai. E-mail : [email protected] * Research scholar, Indian institute of Technology-Madras, Chennai. E-mail : [email protected] It is now well-understood that the isotropically consolidated clay samples do not represent true in-situ stress-strain behavior. In the present paper a series of triaixial tests was conducted to study the effect of anisotropy on the response of the marine clay subjected to monotonic loading. Samples were prepared using slurry consolidation method. The stress induced anisotropy was developed by varying major and minor principal stresses to required stress ratios. The studies conducted for different stress ratios, stress histories and pre-consolidation pressures. Experimental results showed that the degree of anisotropy had significant effect on shear strength and effective stress path of the soil. Based on the experimental observations, a constitutive model, where yield surface can expand and rotate in a p-q space, was proposed to incorporate the anisotropic behavior. Finally the results computed from the proposed model were compared with test results for normally consolidated, lightly over consolidated and heavily over consolidated clays.