Progressive Collapse Assessment of Steel Moment-Resisting Frames Using Static- and Dynamic-Incremental Analyses

AbstractA finite-element modeling study on the progressive collapse of steel moment-resisting frames under column removal scenarios is presented. Different parameters, such as location of initial local failure, number of story, material strain-rate effects, and column removal time (CRT), are conside...

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Bibliographic Details
Published in:Journal of performance of constructed facilities 2020-06, Vol.34 (3)
Main Authors: Kiakojouri, F, Sheidaii, M. R, De Biagi, V, Chiaia, B
Format: Article
Language:English
Subjects:
Catastrophic collapse
Computer simulation
Displacement
Finite element method
Gravitation
Gravitational collapse
Mathematical models
Steel frames
Strain rate
Technical Papers
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Summary:AbstractA finite-element modeling study on the progressive collapse of steel moment-resisting frames under column removal scenarios is presented. Different parameters, such as location of initial local failure, number of story, material strain-rate effects, and column removal time (CRT), are considered. The model structures are analyzed using static- and dynamic-incremental analyses. The former being the well-known pushdown simulations, and the latter performed through dynamic column removal at various gravitational load levels. The progressive collapse potential is mainly related to location of initial failure and size (height) of the models, which determine the affected area after initial local failure. To compare the results, the displacement-based dynamic amplification factor (DAF) is also adopted. It is observed that above a certain gravitational load, the dynamic simulations accounting for material strain rate show displacements smaller than the ones predicted by the static analysis. With the decrease of CRT, the progressive collapse capacity decreases, but DAF tends to be independent from CRT when the systems experience large plastic displacements.
ISSN:0887-3828
1943-5509
DOI:10.1061/(ASCE)CF.1943-5509.0001425