Majid Pouraminian - Islamic Azad University , Ramsar Branch , Iran
Niloufar Jalilvand - Islamic Azad University , Ramsar Branch , Iran

Earthquake is one of the important forces in arch dams design. The hydrodynamic forces resulting from earthquake or shock blast especially in high arc design of concrete dams that their sites are located in high seismic risk , is considerable . For this reason, it seems to use hydrodynamic pressure reducing methods in these types of dams can be more useful. The investigation also indicated to reduce the hydrodynamic pressure due to use the air cushion technique this type of dams, Sometimes even up to 92 percent. Clever use of liquid damper in the vertical seams of concrete arch dams and energy dissipation caused by severe earth movement is another effective method for achieving this goal. Because of the strong ground shaking movements the vertical seams with grout injected torn between the seams, seams opened and are not able to tolerance tensile force and damper mounted between the seams will cause absorption and energy dissipation. There are many other ways that have not been applied practically in any dams yet which is presented in this research text

Hydro-seismic Isolator, High arch dams, Seismic energy dissipation, Fluid damper, Aircushion