DYNAMIC PROGRESSIVE COLLAPSE OF FRAME STRUCTURES

Abstract eng:
Current research on the dynamic progressive collapse of frame structures is presented in this paper. Unlike previous studies that have approached the problem without consideration of inertial effects, our research addresses the importance of dynamic load redistribution. For the present study, a computer program has been developed for analyzing dynamic progressive collapse of 2-D frame structures. Newmark’s method, in conjunction with Newton-Raphson iterations, is used for computing system response as a function of time. Both geometric and material nonlinearities are considered. A damage index is also computed to account for the effects of strength and stiffness degradation, and it is used to determine the onset of member failure. Following member failure, the analysis continues through the use of a modified member stiffness procedure with releases of end forces. The paper concludes with a discussion of other important factors related to progressive collapse including the prediction of impact forces that may result after a member has failed and strikes a portion of the remaining structure.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket