Finite Element Analysis of Dynamic Collapse Behaviors of Framed Structures by the Adaptively Shifted Integration Technique

Abstract

The Adaptively Shifted Integration technique (abbreviated to the ASI technique) is applied to the dynamic collapse problems of framed structures including quasi-static collapse under repeated loadings. The unloading of materials plays an important role in these behaviors. In the present analysis using cubic beam elements, the reshifting of the integration points to the Gaussian points in the unloaded elements is conducted in order to accomplish higher accuracy for the material-unloading behavior. The solutions given by the conventional method, the ASI techniques with and without reshifting are compared to show the validity of the newly proposed computational algorithm.