Vol. 15, No. 4, pp. 377-385 (2019)
ANTI-COLLAPSE ANALYSIS OF UNEQUAL SPAN STEEL BEAM–COLUMN
SUBSTRUCTURE CONSIDERING THE COMPOSITE EFFECT OF FLOOR SLABS
Wei-hui Zhong1, 2, *, Zheng Tan1, Xiao-yan Song1 and Bao Meng1
1 School of Civil Engineering, Xi'an University of Architecture & Technology, Xi'an 710055, China
2Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education, Xi’an University of Architecture and Tech nology, Xi’an 710055, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 25 December 2018; Revised: 05 August 2019; Accepted: 11 August 2019
DOI:10.18057/IJASC.2019.15.4.8
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ABSTRACT
Based on the alternate load path method and considering the composite effect of floor slabs, a beam–column frame with unequal spans was studied to derive the equations for the load–deformation relationship at five different stages (elastic, elastic–plastic, plastic, transient, and catenary) during progressive collapse. The anti-collapse mechanism of the composite beam–column frame and the influence of arch action were carefully analyzed. A numerical model was established using ABAQUS for the relevant model, and the model was verified by comparison with experimental data. Further, the theoretical equations were compared with the results of numerical simulations for different span ratios. The results show that the theoretical equations possess good generality and high accuracy for analyzing progressive collapse of a composite beam–column frame with unequal spans.
KEYWORDS
Composite beam–column frame, Anti-collapse mechanism, Progressive collapse, Arch action, Unequal spans
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