Development of Pseudo-Static Method for Stability Analyses of Embankment Dams

Pseudo-static analysis is a common and simple method for the evaluation of seismic stability in embankment dams. Selection of the horizontal Pseudo-static coefficient is a primary step for evaluation of seismic behavior of embankment. Previous researchers and design manuals of embankment dams often suggest constant values for selecting the seismic coefficient regardless of site seismicity and the dynamic characteristics of the structures. In order to evaluate geometric effect, pseudo-static, static and dynamic analyses of the Masjed Soleiman dam With Finite Element Method performed and then precise a new equation to determine the pseudo-static coefficient of earth dams. In this equation, variations in acceleration for height of the dam, considered linear and the gradient of this line related to the geometrical characteristics of the dam body, soil stiffness and damping values. Result of this research imply that with increasing height of dam, decrease gradient of acceleration and with increasing slope of dam, increase gradient of acceleration.