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Characterization of residual stresses for LTB simulations of modern welded girders
Abstract A number of factors affect the lateral–torsional buckling (LTB) behaviour of steel members. Residual stresses are known to influence LTB in the inelastic range, with differing patterns between rolled and welded sections causing differences in inelastic LTB capacity between the two section types, even if geometry is identical. Finite element simulations can facilitate detailed investigation of this phenomenon; however, it is important that assumed initial residual stress distributions used in such simulations are accurate. While residual stress data are available for welded sections, existing proposed predictive models for these stresses are based on limited data sets, making it unclear if the models are appropriate for a broader range of sections. Therefore, to address the need for accurate LTB simulations in research, a new predictive residual stress model for modern welded girders is proposed in this study, based on recent residual stress measurements on welded sections. The proposed model takes section geometry and welding parameters into account and is calibrated with multiple data sets from the literature. Finite element simulations of LTB are carried out using the proposed model and an additional model proposed by Chernenko and Kennedy.
Graphical abstract Display Omitted
Highlights An updated residual stress model for lateral–torsional buckling (LTB) simulations of welded girders is proposed. The model is based on data from a recent set of measurements on welded girders, and is verified by data from the literature. Finite element simulations of LTB are carried out to compare the proposed model with an existing model.
Characterization of residual stresses for LTB simulations of modern welded girders
Abstract A number of factors affect the lateral–torsional buckling (LTB) behaviour of steel members. Residual stresses are known to influence LTB in the inelastic range, with differing patterns between rolled and welded sections causing differences in inelastic LTB capacity between the two section types, even if geometry is identical. Finite element simulations can facilitate detailed investigation of this phenomenon; however, it is important that assumed initial residual stress distributions used in such simulations are accurate. While residual stress data are available for welded sections, existing proposed predictive models for these stresses are based on limited data sets, making it unclear if the models are appropriate for a broader range of sections. Therefore, to address the need for accurate LTB simulations in research, a new predictive residual stress model for modern welded girders is proposed in this study, based on recent residual stress measurements on welded sections. The proposed model takes section geometry and welding parameters into account and is calibrated with multiple data sets from the literature. Finite element simulations of LTB are carried out using the proposed model and an additional model proposed by Chernenko and Kennedy.
Graphical abstract Display Omitted
Highlights An updated residual stress model for lateral–torsional buckling (LTB) simulations of welded girders is proposed. The model is based on data from a recent set of measurements on welded girders, and is verified by data from the literature. Finite element simulations of LTB are carried out to compare the proposed model with an existing model.
Characterization of residual stresses for LTB simulations of modern welded girders
Unsworth, Daniel (author) / Driver, Robert G. (author) / Li, Leijun (author) / Twizell, Sheldon (author) / Imanpour, Ali (author)
2021-05-19
Article (Journal)
Electronic Resource
English
Measurement and prediction of residual stresses in welded girders
| Elsevier | 2020
Residual Stresses in Welded I-Girders Made of Stainless Steel and Carbon Steel
| British Library Conference Proceedings | 2001
| Engineering Index Backfile | 1964