Abstract
This study investigated the effects of the input parameters on analyses of the stability of earth-filled dams based on experimental design, in particular an orthogonal design. Computer-based experiments that conformed to an orthogonal design were carried out to increase the efficiency of the stability analysis, and a linear regression model was used to analyze the results of the numerical experiments. The standardized regression coefficients (SRCs) obtained from the regression analysis were used as indexes of the sensitivity of Fs to the input parameters. The results of the sensitivity analysis showed that the parameters related to the geometry of earth-filled dams, such as the height and slope gradient, have a greater effect on Fs than those related to the hydraulic characteristics of the fill materials.
