TY - JOUR ID - 1748 TI - Effect of Intermediate Principal Stress Parameter on Cyclic Behavior of Sand JO - Scientia Iranica JA - SCI LA - en SN - 1026-3098 AU - Jafarzadeh, Fardin AU - Zamanian, Mostafa AD - Department of Civil Engineering, Sharif University of Technology, Azadi Ave., Tehran, Iran Y1 - 2014 PY - 2014 VL - 21 IS - 5 SP - 1566 EP - 1576 KW - Sand KW - intermediate principal stress KW - anisotropy KW - cyclic hollow cylinder apparatus KW - stress path DO - N2 - Soils have an anisotropic response and changing the inclination (α) and magnitude of the major principal stress will affect the collapse potential and brittleness as well as the shear strength and shear stiffness. In this paper the effect of stress path with changing in intermediate principal stress on the dynamic behavior of Babolsar sand is studied. A series of undrained monotonic and cyclic tests on loose sand with induced anisotropy were conducted using automatic hollow cylinder apparatus. Special attention was paid to the significant role of the intermediate principal stress parameter (b) in the deformation behavior of sand during cyclic loading. Results show that at constant α, confining stress and fabric; variation ofb has significant effect on the strain amplitudes but it would not change contractive or dilative behavior of specimens. The variation of b has high effect on liquefaction resistance but has no effect on the mobilized friction angle at steady state. It is shown that confining stress has significant effect on soil response (the strain development, excess pore water pressure generation and shear modulus and damping ratio). Moreover by increasing the confining stress, the effect of b value on cyclic behavior will be more pronounced. UR - https://scientiairanica.sharif.edu/article_1748.html L1 - https://scientiairanica.sharif.edu/article_1748_230cf06d87eabb125d86bc5a68ddeaa6.pdf ER -