Layout of cross braces on progressive collapse analysis of a 3D 12-story steel composite frame structures
Joint Authors
Source
Journal of Engineering Research
Issue
Vol. 8, Issue 2 (30 Jun. 2020), pp.45-58, 14 p.
Publisher
Kuwait University Academic Publication Council
Publication Date
2020-06-30
Country of Publication
Kuwait
No. of Pages
14
Main Subjects
Abstract EN
In this paper, cross braces are provided to mitigate the dynamic responses of steel frames caused by column-remove scenarios.
to evaluate the effectiveness of cross braces with different layout on enhancing the progressive collapse resisting capacity of the structures, alternative path method (APM) is performed on structural nonlinear dynamic history analysis.
firstly, a three-dimensional finite element model for 12-story steel composite frame structure is built with considering the contribution of the composite behavior of the floor system.
then, the FEM modeling method is verified by a progressive collapse test.
Finally, a series of progressive collapse analyses on such model with different column-remove scenarios and layout of cross braces are carried out.
the results show that the cross braces could mitigate the dynamic response caused by column failure in the affected bay, but no obvious mitigation were observed in the other bays.
cross braces blocked the horizontal development of structural progressive collapse for the structure with vertical layout of cross braces (SF-VB), which might aggravate the dynamic response of the affected bay through protecting the residual structure.
cross braces layout at the top layer (TB) decreased the peak displacement of corner column failure mode above 50% and was about 30% for the side column failure mode.
the dynamic increase factor (DIF) of the most models was about 1.5, which demonstrated that the value given by the standards might result with some conservatism, but the DIF might be close to the given value for SF-VB.
Such results provided basis for information for progressive collapse prevention designs of such structural systems.
American Psychological Association (APA)
Hu, Yi& Zhao, Junhai. 2020. Layout of cross braces on progressive collapse analysis of a 3D 12-story steel composite frame structures. Journal of Engineering Research،Vol. 8, no. 2, pp.45-58.
https://search.emarefa.net/detail/BIM-1494937
Modern Language Association (MLA)
Hu, Yi& Zhao, Junhai. Layout of cross braces on progressive collapse analysis of a 3D 12-story steel composite frame structures. Journal of Engineering Research Vol. 8, no. 2 (Jun. 2020), pp.45-58.
https://search.emarefa.net/detail/BIM-1494937
American Medical Association (AMA)
Hu, Yi& Zhao, Junhai. Layout of cross braces on progressive collapse analysis of a 3D 12-story steel composite frame structures. Journal of Engineering Research. 2020. Vol. 8, no. 2, pp.45-58.
https://search.emarefa.net/detail/BIM-1494937
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 57-58
Record ID
BIM-1494937