الفهرس 
CHAPT ER (1) : INTR ODUC TIONOnly 14 pages are availabe for public view
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Abstract
This dissertation reports new test conducted to augment available data highlighting the structural performance of multi-storey steel frames under progressive collapse. The steel frames investigated had different geometries, different boundary conditions, different collapse mechanisms, different damping ratios and different connections in the steel frames. In overall, the dissertation addresses multi-storey frames would behave when subjected to local damage or loss of a main structural carrying element. The time history behavior of the steel frames deformations and failure modes are investigated and discussed in this dissertation. Also, the redistribution of forces and stresses in the remaining structural elements after the damage or loss of the structural element is studied.
In addition, efficient nonlinear 3-D and 2-D finite element models for the building are developed and verified against the tests carried out in this dissertation as well as available data in the literature. The comparison against test results and available data showed that the models are capable of presenting the overall structural behavior of the steel frames. The nonlinear finite element models accented for the nonlinear material and geometry behavior of the steel frames. Furthermore, extensive parametric studies are performed using the verified finite element model to study different parameters affecting the progressive collapse of steel frames. The dissertation provided detailed explanations and discussions of the steel frame based on combined experimental and numerical investigations.