Blast-induced progressive collapse of steel moment-resisting frames: Numerical studies and a framework for updating the alternate load path method

2021 ◽  
Vol 242 ◽  
pp. 112541
Author(s):  
Foad Kiakojouri ◽  
Mohammad Reza Sheidaii ◽  
Valerio De Biagi ◽  
Bernardino Chiaia
Keyword(s):  
Progressive Collapse ◽  
Load Path ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Numerical Studies ◽  
Moment Resisting

scholarly journals Robustness Assessment of Steel Moment Resisting Frames

2017 ◽  
Vol 11 (1) ◽  
pp. 420-433 ◽  
Author(s):  
David Cassiano ◽  
Carlos Rebelo ◽  
Luís Simoes da Silva
Keyword(s):  
Seismic Design ◽  
Progressive Collapse ◽  
Design Criteria ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Long Span ◽  
Moment Resisting ◽  
Structural Plastic ◽  
Steel Mrf ◽  
Pushdown Analysis

Nowadays, many buildings with steel Moment Resisting Frames (MRF) are built in seismic zones when seismic codes are at its early stages of development, and as such, these structures are often designed solely to resist lateral wind loads without providing an overall ductile mechanism. On the other hand, current seismic design criteria based on hierarchy of resistance allow enhancing the structural ductility and controlling the structural plastic behaviour. Therefore, seismic design criteria might also be beneficial to improve the structural robustness. In order to investigate this issue for steel MRF, a parametric study based on pushdown analysis and on the Energy Balance Method is described and discussed in the present paper. With this regard, the following cases are examined: (i) MRF not designed for seismic actions and (ii) MRF designed for seismic actions. The investigated parameters are (i) the number of storeys, (ii) the interstorey height, (iii) the span length, (iv) the building plan layout and (v) the column loss scenario. Results show that the low-rise and long span structures are the most prone to progressive collapse and that the elements in the directly affected zone of the wind designed 8 storey structures respond in the elastic range. Structures designed according to the capacity design principles were found to be less robust than wind designed structures that are characterized by strong beams and weak columns. The number of elements above the removed column and size of beam cross section were found to be key parameters in arresting progressive collapse.

Effect of span length on progressive collapse behaviour of steel moment resisting frames

Structures ◽  
2015 ◽  
Vol 3 ◽  
pp. 81-89 ◽  
Author(s):  
Farshad Hashemi Rezvani ◽  
Amir Mohammad Yousefi ◽  
Hamid Reza Ronagh
Keyword(s):  
Progressive Collapse ◽  
Span Length ◽  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Moment Resisting

Performance-based assessment of seismic-resilient steel moment resisting frames equipped with innovative column base connections

Structures ◽  
2021 ◽  
Vol 32 ◽  
pp. 1646-1664
Author(s):  
Elena Elettore ◽  
Annarosa Lettieri ◽  
Fabio Freddi ◽  
Massimo Latour ◽  
Gianvittorio Rizzano
Keyword(s):  
Steel Moment Resisting Frames ◽  
Moment Resisting Frames ◽  
Performance Based Assessment ◽  
Moment Resisting ◽  
Base Connections ◽  
Column Base
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