401 Dynamic Buckling Analysis of Cylindrical Water Storage Tanks Considering Coupled Vibration between Fluid and Structure

Abstract

This study proposes a dynamic elasto-plastic analysis method which can accurately simulate buckling behavior of cylindrical water storage tanks during earthquake. This proposed method takes into account the behavior of oval-type vibration as well as beam-type vibration. In the proposed method, water in the tanks is modeled and coupled analysis between fluid and structure is adopted in addition to consideration of large deformation of the tank walls. The analytical results by the proposed method have been in good agreement with those of experiment in the matter of occurrence of oval-type vibration, mode of buckling and buckling load.