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http://dx.doi.org/10.12989/scs.2016.21.3.553

Progressive collapse analysis of steel frame structure based on the energy principle  

Chen, Chang Hong (School of Mechanics, Civil Engineering, Northwestern Polytechnical University)
Zhu, Yan Fei (School of Mechanics, Civil Engineering, Northwestern Polytechnical University)
Yao, Yao (School of Mechanics, Civil Engineering, Northwestern Polytechnical University)
Huang, Ying (School of Civil Engineering, Xi'an University of Architecture and Technology)
Publication Information
Steel and Composite Structures / v.21, no.3, 2016 , pp. 553-571 More about this Journal
Abstract
The progressive collapse potential of steel moment framed structures due to abrupt removal of a column is investigated based on the energy principle. Based on the changes of component's internal energy, this paper analyzes structural member's sensitivity to abrupt removal of a column to determine a sub-structure resisting progressive collapse. An energy-based structural damage index is defined to judge whether progressive collapse occurs in a structure. Then, a simplified beam damage model is proposed to analyze the energies absorbed and dissipated by structural beams at large deflections, and a simplified modified plastic hinges model is developed to consider catenary action in beams. In addition, the correlation between bending moment and axial force in a beam during the whole deformation development process is analyzed and modified, which shows good agreement with the experimental results.
Keywords
progressive collapse; energy; sensitivity; modified plastic hinges model; steel frame;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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