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Bending capacity of girth-welded circular steel tubes
- Issue Date
- Aug-2012
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Girth-welded circular steel tubes; Weld-induced residual stress and deformation; Bending; Nonlinear finite element analysis; Buckling
- Citation
- JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, v.75, pp 142 - 151
- Pages
- 10
- Journal Title
- JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
- Volume
- 75
- Start Page
- 142
- End Page
- 151
- ISSN
- 0143-974X
1873-5983
- Abstract
- In this paper, the buckling behavior of girth-welded circular steel tubes subjected to bending was investigated by numerical method. Finite element (FE) simulation of the girth welding process was first performed to obtain weld-induced residual stress and deformation employing sequentially coupled three-dimensional (3-D) thermo-mechanical FE formulation. Elastoplastic large-deformation analysis in which the failure mode, the ultimate moment capacity and the moment versus end-rotation behavior of girth-welded circular steel tubes under pure bending were explored incorporating weld-induced geometric imperfection and residual stress was next carried out. Results showed that the flexural behavior of girth-welded circular steel tubes always involves local buckling near the girth weld on the compression side, which significantly affects the moment versus end-rotation response. (C) 2012 Elsevier Ltd. All rights reserved.
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