Water is human basic needs for daily life. Sufficient water distribution depends on design of a water tank in certain area. An elevated water tank is a large water storage container constructed for the purpose of holding water at certain height to pressurize the water distribution system. Thus Water tanks are very important for public utility and for industrial structure. Elevated water tanks consist of huge water mass at the top of a slender staging, which are most critical consideration for the failure of the tank during earthquakes. Elevated water tanks are critical and strategic structures and damage of these structures during earthquakes effects on drinking water supply, cause to fail in preventing large fires and substantial economic loss. Since, the elevated tanks are frequently used in seismic active regions, seismic behavior of these tanks has to be investigated in detail. Due to the lack of knowledge of supporting system, some of the water tanks collapsed during past earthquakes. Hence in this study, an effort has been made to study the seismic behavior of elevated water tank supported on frame type staging and shaft type staging with consideration and modeling of impulsive and convective water masses inside the container for different zones and soil types.
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