Abstract
The main objective of this study is to investigate the dynamic behavior of circular cylindrical intake towers. Intake towers are typically tall and hollow structures made of reinforced concrete and they form entrance to reservoir outlet works. The circular intake towers are structurally more efficient, providing economic savings, particularly in high-head projects. The effect of depth of submergence, slenderness ratio and wall thickness is studied. The hydrodynamic effects are accounted for using added mass concept. Also, the soil-structure-interaction analysis is carried out to study its effect on the dynamic behavior of the intake towers. The computer software package, SAP2000, is used for developing finite element models of intake tower and soil using shell elements and solids respectively. Modal and Response Spectrum analyses are carried out to determine the dynamic characteristics and response of the tower to earthquake excitation for various geometrical parameters and submergence conditions.
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