Effect of beam web bolt arrangement on catenary behaviour of moment connections

Li, L, Wang, W, Chen, Y and Lu, Y 2015, 'Effect of beam web bolt arrangement on catenary behaviour of moment connections', Journal of Constructional Steel Research, vol. 104, pp. 22-36.


Document type: Journal Article
Collection: Journal Articles

Title Effect of beam web bolt arrangement on catenary behaviour of moment connections
Author(s) Li, L
Wang, W
Chen, Y
Lu, Y
Year 2015
Journal name Journal of Constructional Steel Research
Volume number 104
Start page 22
End page 36
Total pages 15
Publisher Elsevier Ltd
Abstract In a column-removal scenario for a building structure, the catenary action will play an essential role for the frame in resisting a progressive collapse. This paper investigates the catenary behaviour of welded unreinforced flangebolted web connections (i.e. WUF-B connection) in plane frames by means of full-scale testing and numerical simulation. Two different layouts of bolts at the beam web were considered, with four bolts arranged in one row or two rows in the two specimens, respectively. The results demonstrate that both specimens of the WUFB moment connection were able to develop an effective catenary action via the boltedweb following the primary flexural phase. The failure modes of the bolted web vary with different bolt arrangements under the catenary action. When all (four) bolts were arranged in one row, the lowest bolt bearing area on the web tends to be compressed to fracture before bolt tear-out failure occurs near the weld access hole. When the bolts were arranged in two rows, however, the shear tab cracked at the section across the bolt holes. The former failure mode is deemed to be more robust than the latter under a column removal scenario.
Subject Structural Engineering
Keyword(s) Bolts
Catenary action
Experiment
Fracture
Numerical simulation
Progressive collapse
WUF-B connection
DOI - identifier 10.1016/j.jcsr.2014.09.016
Copyright notice © 2014 Elsevier Ltd. All rights reserved.
ISSN 0143-974X
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