Abstract
This study treats the elasto-plastic deformation and buckling behavior of thin cylindrical shell subjected to multi-directional excitations. A steel cylindrical pier is modeled as a thin cylindrical structure with an attached mass on its tip. Numerical simulations are carried out, where the horizontal and the vertical seismic loads are applied simultaneously. The effects of the horizontal and vertical input frequencies and input accelerations on the dynamic behaviors are studied, under both the elastic shell assumption and the elasto-plastic shell assumption. It is found that flattening phenomena will occur for the elastic shell and the buckling phenomena similar to that found in Hyogo Ken Nambu Earthquake occurs for the elasto-plastic shell.
