ABSTRACT
Shaping and performing building structures analysis based on avoiding the disproportionate damage to the initial cause during accidental situation is nowadays essential concern of designers. A several ways to protect the structures against progressive collapse are presented in current design standards. As a main strategy to mitigate a progressive collapse an alternative load path method is recommended. The ability of structure to overcome collapse is defining as structural robustness. The paper presents results of the part of research project aiming robustness behavior analysis of steel frames with bolted end-plate joints. First step was experimental test of selected, isolated flush and extended end plate joints, to obtain available rotation capacity of the joints tested in column loss scenario. Next, advanced FEM models were created, which after hierarchic validation, were used to simulate experimentally tested joints to compare results. FEM was also used to modeling behavior of subframe tested early experimentally. Last part will be FEM analysis of few plane frames configuration to obtain required rotation capacity of the joints.
