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Abstract
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in this paper, parametric study and sensitivity analysis of symmetrical trapezoidal hard fill dams are carried out. Finit Element Method is used to analyze the stresses in dam body and the basement under different cases. Differet dam slops and various rigidities of foundation and dam body are considered to study the effects of these factors on the behavior of the dam stresses. In contrast, the effect of dam body modulus of elasticity is vice versa. The results indicate that, when down stream slope is lower than 0.7H:1V, there is big compressive stresses close to dam toe. According to sensitivity analysis, changes in downstream slope and changes in upstream and downstreamslopes simultaneously are the main parameters affecting the maximum principle tensile, compressive stress of dam body and maximum compressive stress at dam basement.
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