Seismic Analysis of Double Curved Arch Dams Based Performance

The response of dams subjected to seismic excitation can be evaluated by a number of analysis methods. The traditional approach is to employ linear static or dynamic analyses coupled with appropriate modification to account for inelastic response while current design practice is moving towards an increased emphasis on nonlinear static analysis methods. In this study, a seismic response analysis of a double-curvature arch dam has been performed using nonlinear static analysis similar to capacity spectrum method. The method involves choosing the proper coordinate to evaluate the structure's behaviour using a suitable push load profile, conversion of seismic demand to the same coordinate, and determination of the performance state. The results of the developed algorithm have been compared with time history dynamic analysis of Karoun IV double curved arch dam which shows reasonable agreement with considerable less expenses and complications.