Dynamic Stability Analysis of Steel-Concrete Composite Ribbed Shell under Vertical Step Loads

Abstract

The steel-concrete composite ribbed shell is a kind of novel space structure. In this paper, using space beam element and shell element, based on the nonlinear FE theory, considering the elastic-plastic material and geometric nonlinear, in view of the system dynamic response of identifying method, dynamic stability of steel-concrete composite ribbed shell under vertical step loads are studied. Setting up the relationship, it is between load amplitude and dynamic response of the structures, comparing rigid joint with hinge joint on the edge of structure, Critical load conditions of dynamic stability are defined.