A Simplified Method for Seismic Analysis of Tanks with Floating Roof by using Finite Element Method: Case S tudy of Kharg (Southern Iran) Island Tanks Abstract Tanks with floating roof have shown high vulnerability subjected to past earthquakes, such as Kobe, and Izmit. The main cause of damage is believed to be the interaction between the floating roof and the tank wall. In this paper a simplified method is presented for modeling the floating roof and its interaction with the tank wall, making...