The University of Massachusetts Amherst
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Analytical assessment of steel frames progressive collapse vulnerability to corner column loss

TitleAnalytical assessment of steel frames progressive collapse vulnerability to corner column loss
Publication TypeJournal Article
Year of Publication2014
AuthorsGerasimidis S
JournalJournal of Constructional Steel Research
Start Page1
Date Published04/2014
Keywordsbuckling, Column removal, Damaged steel frames, Progressive collapse, Robustness, Vulnerability of systems

Most of the approaches to the progressive collapse analysis of steel frames have focused so far on computational methods which try to capture the solution of the system responding to localized damage. For the case of progressive collapse, damage is included in the model through the removal of a key element of the structure. The computational difficulty of these approaches, however, makes it very hard for practicing engineers to perform these analyses. For that reason, it is very important for the engineering community to develop simple and reliable analytical tools which could provide useful information on the response of a structure to a column loss. This paper applies a threat-independent analytical method regarding the corner column loss case, which has been presented by the author in previous papers to a wide range of symmetric and non-symmetric steel moment-resisting (sway) frames. The analytical and simple method can indicate the collapse mechanism of a steel frame for the case of a corner column loss through the development of critical ductility curves. The impact of the number of floors, the column removal location, the vertical irregularity and the design of the frames is also studied.