Analysis of steel frame under selected accidental situation

The current design codes recommend designing the building structures based on the assumption avoiding the disproportionate to the initial cause damage during accidental situation. As a main strategy to mitigate a progressive collapse an alternative load path method is recommended. Flush and extended...

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Bibliographic Details
Published in:Archives of civil engineering 2022-01, Vol.68 (4), p.293-309
Main Authors: Kukla, Damian, Kozlowski, Aleksander
Format: Article
Language:English
Subjects:
accidental situation
Bolted joints
Building codes
Catastrophic collapse
Civil engineering
column loss
Columns (structural)
Concrete
Damping
Design
dynamic analysis
End plates
Environmental engineering
fea
Finite element analysis
Finite element method
Joints (junctions)
Load
Mathematical models
Numerical analysis
robustness
Robustness (mathematics)
Seismic engineering
steel end-plate bolted joints
Steel frames
Two dimensional models
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Summary:The current design codes recommend designing the building structures based on the assumption avoiding the disproportionate to the initial cause damage during accidental situation. As a main strategy to mitigate a progressive collapse an alternative load path method is recommended. Flush and extended bolted end-plate joint to connect beam-to-column were experimentally tested. Hierarchical validation of joint FEM models based on experimental test results were performed. The numerical dynamic analysis by finite element method of selected steel frame under column loss scenario is presented. The planar 2D model of frame were used. Shell elements for beams and columns and solid elements for joints were employed respectively. Nonlinear material and geometry were applied in the analysis. Johnson-Cook model was used to describe the change of steel parameters by dynamic Increase Factor (DIF). The Rayleigh model to include the damping effects in the analysis was used. The dynamic analysis was performed with the use of Abaqus/Explicit module. Main conclusion of presented research it that to achieve the required level of robustness, bolted beam-to-column joints with extended end-plate of thickness more than 15 mm should be used.
ISSN:1230-2945
2300-3103
DOI:10.24425/ace.2022.143039