Research on joint models of welded flange-bolted web connection for progressive collapse analysis of steel frames

Li, L, Wang, W and Yan, P 2014, 'Research on joint models of welded flange-bolted web connection for progressive collapse analysis of steel frames', Gongcheng Lixue/Engineering Mechanics, vol. 31, no. 12, pp. 119-125.


Document type: Journal Article
Collection: Journal Articles

Title Research on joint models of welded flange-bolted web connection for progressive collapse analysis of steel frames
Author(s) Li, L
Wang, W
Yan, P
Year 2014
Journal name Gongcheng Lixue/Engineering Mechanics
Volume number 31
Issue number 12
Start page 119
End page 125
Total pages 7
Publisher Qinghua Daxue Tumu Shuili Gongcheng Xueyuan, Tumu Xi,Tsinghua University, School of Civil Engineering, Department of Civil Engineering
Abstract Based on progressive collapse-behavior test results on a cold-formed RHS column to an H-beam sub-assemblage with a welded flange-bolted web connection, the whole process performance of the joint was reasonably reproduced through high fidelity finite element modeling by using ABAQUS software, including the beam bottom flange fracture under a middle column removal scenario. A simplified joint model was further proposed based on the component method and back-stepping method, which can reflect a force evolving process and discontinuous deformation such as fracture and a post-fracture path with a cost-effective solution. Incorporating this joint model, the dynamic nonlinear progressive collapse analysis was carried out on a five storey by four bay steel frame. It is found that the joint fracture imposes a significant impact on the structural vertical response and sufficient attention should be therefore paid on the behavior evaluation for progressive collapse.
Subject Structural Engineering
Keyword(s) Fracture
Progressive collapse
Simplified model
Steel frame
Welded flange-bolted web connection
DOI - identifier 10.6052/j.issn.1000-4750.2013.07.0615
Copyright notice © 2014, Tsinghua University. All right reserved.
ISSN 1000-4750
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