نوع مقاله : پژوهشی
نویسندگان
1 دانشکده مهندسی عمران، دانشگاه تبریز
2 دانشکده مهندسی عمران، دانشگاه صنعتی امیرکبیر
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
It has been understood from experimental studies that granular soil behavior can be highly affected by density and mean principal effective stress. The effect of these factors on sand behavior is of great significance, and defining
the nature of the link between them and their controls on the behavior of sand, is carried out in this study.
Sand, in its loose or dense state, before approximating its critical state, obtains a constant stress ratio. Therefore, changes in the stress ratio of shear stress to mean effective stress may be ignored. It is worth mentioning that in loose sand, it is corresponded to phase transformation, but, it happens next to phase transformation in dense sand. The point at which the constant ratio initiates is of great importance and is called Initial Failure Point. The present study tries to outline two noble state parameters; early confining stress ratio,
mean effective stress to the mean effective stress of the early point of the failure line, and as the stress ratio of the current shear stress to the shear stress of the early point of the failure line. Furthermore, another state parameter, confining stress ratio,
Finally, through introducing four state parameters including: initial state pressure index,
loading.
کلیدواژهها [English]
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