Abstract
In the current seismic performace evaluation method, the safety of the road embankments is confirmed by comparing the analyzed sliding displacement with the allowable displacement. The sliding displacment is practically analyzed by the Newmark method. This study proposes a simple evaluation method of sliding displacement which has the equivalent accuracy with the Newmark method. The Newmark method solves the equation of motion consisting of two important parameters, yield and sliding coefficients, and this study propose the regression equations to estimate these two parameters. The regression equations were confirmed to have good accuracy. Futhermore, the new design spectra, namely the sliding displacement spectrum, is proposed which express the effect of the ground motion on the sliding displacement. Simple evaluation method of sliding displacement using the sliding spectra and regression equations are also proposed.
