A SIMPLE CALCULATION METHOD OF THE NATURAL FREQUENCY IN THE HORIZONTAL AND VERTICAL DIRECTION FOR EMBANKMENTS ON TILTED BEDROCK

Abstract

The damage of the embankments on tilted bedrock is reported in recent earthquakes. However, there are few studies about the characteristics of seismic response of the embankments on such tilted bedrock, and the effects of a vertical seismic motion on the damage to earth structures are not investigated well.
In this fundamental study, the equations for the natural frequency in the horizontal and vertical direction considering the shape of embankments were proposed. Then, the proposed equation were examined with the results of shaking table tests and the FEM calculation result.