Vertical Accelerations in Prestressed Concrete Tanks

Abstract

Vertical accelerations of circular cylindrical tanks and their contents cause hoop forces in the tank walls. The hoop forces caused by hydrodynamic fluid pressure are additive to those caused by hydrostatic fluid pressure; earthquake‐resistant design of tanks should therefore consider the combined fluid pressure. The design of a prestressed concrete tank wall must be such that under combined hydrostatic and earthquake‐induced hoop forces either: (1) The concrete does not crack (if leaking is not permitted); or (2) the stress in the prestressing wires remains below