The paper deals with the progressive collapse risk assessment of seismic designed steel moment frames subject to column removal scenario. This study investigated three types of analysis methods linear static, nonlinear static and nonlinear dynamic. A design example of multi-story steel buildings is examined in the context of the European Standards and classification of steel sections. The influence of the fundamental parameters involved in progressive collapse analysis was highlighted. The effects of building properties and location of the removed column on the collapse mechanisms and catenary effects were studied. Finally, the paper investigated the dynamic increase factor to be applied in the simplified procedures to the bays that are affected by the removed column to compensate for the dynamic effects corresponding to the real load redistribution. The values obtained were finally compared with the GSA formulation based on the ductility factor.

Progressive collapse risk assessment of seismic designed steel moment frames

Massimiliano Ferraioli;Alberto Mandara;
2018

Abstract

The paper deals with the progressive collapse risk assessment of seismic designed steel moment frames subject to column removal scenario. This study investigated three types of analysis methods linear static, nonlinear static and nonlinear dynamic. A design example of multi-story steel buildings is examined in the context of the European Standards and classification of steel sections. The influence of the fundamental parameters involved in progressive collapse analysis was highlighted. The effects of building properties and location of the removed column on the collapse mechanisms and catenary effects were studied. Finally, the paper investigated the dynamic increase factor to be applied in the simplified procedures to the bays that are affected by the removed column to compensate for the dynamic effects corresponding to the real load redistribution. The values obtained were finally compared with the GSA formulation based on the ductility factor.
2018
Ferraioli, Massimiliano; Mandara, Alberto; Lavino, Angelo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11591/395503
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