Evaluation of progressive collapse potential of multi-story moment resisting steel fr
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Evaluation of progressive collapse potential of multi-story moment resisting steel fr
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Evaluation of progressive collapse potential of multi-story moment resisting steel frame buildings under lateral loading

Author: H.R. Tavakoli, A. Rashidi Alashti | Size: 1.2 MB | Format: PDF | Quality: Unspecified | Publisher: Science Direct | Year: 2012 | pages: 10


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The aim of this study is to investigate whether MRF steel structures that have been designed
based on seismic codes, are able to resist progressive collapse with damaged columns in different locations
under seismic loading.
For this purpose, 3-D and 2-D push-over analysis of structures is carried out. The progressive collapse
potential has been assessed in connection with 5 and 15-story buildings with 4 and 6 bays by applying the
alternate load path method recommended in UFC guidelines.
Member removal in this manner is intended to represent a situation where an extreme event, such as
vehicle impact or past earthquake shock or construction error, may cause a critical column, as a result of
local or global buckling, to lose a part or whole of its load bearing capacity.
In contrast with 3-D models, two-dimensional frames represent a higher sensitivity to base shear
reduction and element removal. In the case of middle column removal, the structure is more robust than
in a corner column removal situation. The influence of story number, redundancy and location of critical
eliminated elements has been discussed.

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