STABILITY ANALYSIS OF ARCH DAM ABUTMENTS DUE TO VERTICAL SEISMIC EXCITATIONS

In this study, the effects of grout curtain performance, and vertical component of earthquake on the stability of the arch dam abutments are investigated. For this purpose, a 3-D finite element model of Bakhtiari dam, including damfoundation- reservoir interactions, is developed and the abutment stability of wedges are investigated by the Londemethod. The obtained results indicate that uplift pressure can play a key role in abutment stability analysis. Also, considering the vertical component of ground motion is an important parameter affecting the abutments stability of arch dams under earthquakes

Keywords:

Safety factor , Londe method , Bakhtiari dam , Uplift pressure , Vertical earthquake