Comparing analysis for modeling liquid in elevated water tank

. In this research, a study of a model of reinforced concrete elevated water tank, with capacity of 900 cubic meters, supported with frame system is carried out using finite element method (FEM). The liquid mass contained in the container is modeled as the sum of two separated messes i.e. impulse mass and convective mass following the recommendations of Eurocode 8 , 2006, for cases full container. The second ones Gareane2011 method . The soil is modeled using (FEM) with energy absorbent boundaries (dampers) to prevent the combination of earthquakes waves.