دانلود Progressive Collapse of Steel Frames

Abstract

This paper  investigates  the behavior  of  steel  frames  under  progressive  collapse using  the finite  element  method.  Non- linear finite element models have been developed and verified against existing data reported in the literature as well as against tests conducted by the authors. The nonlinear material properties of steel and nonlinear geometry were considered in the finite element models. The validated models were used to perform extensive parametric studies investigating different parameters affecting the behavior of steel frames under progressive collapse. The investigated parameters are comprised  of  different  geometries,  different  number  of  stories  and  different  dynamic  conditions.  The  force  redistribution and failure modes were evaluated from the finite element analyses, with detailed discussions presented.