Time Period Determination for Shaft-Type Elevated Water Tank

An elevated water tank is constructed to store water at a certain height in order to pressurize the water distribution system. Elevated water tanks are often built with framed or shaft-type staging. When the staging height exceeds 15 m, shaft-type stagings are often used due to the fact that they may be constructed with slip form shuttering. In either case, lateral load analysis dominates the evaluation of seismic vulnerability. According to researchers, the elevated tanks supporting system (staging) is an especially vital structural aspect of the tanks. This paper deals with the stiffness of shaft-type elevated tank stagings. This study focus on the stiffness determination from analytical formula to software model implementation. In this work, a shaft-type raised water tank staging with varied time periods was taken to examine the difference in tank staging stiffness. It is observed that the conventional method which assumes staging stiffness calculation is very inaccurate.