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Lateral-torsional buckling resistance of castellated beams

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Abstract
The existing design expressions for the lateral-torsional buckling behavior of castellated beams conflict. Furthermore, they do not take into account the detrimental effect of the residual stress modification attributable to the fabrication process, which was only recently demonstrated by the authors. This makes these design rules possibly unsafe. In this paper, the lateral-torsional buckling behavior of doubly symmetric castellated beams loaded by a constant bending moment is investigated numerically. The numerical model, including the modified residual stresses, was validated by comparing its results with experimental results. A preliminary design approach is proposed based on the current European guidelines for the calculation of the lateral-torsional buckling resistance of I-section beams. According to the proposed approach, the lateral-torsional buckling resistance of castellated beams can be determined using the cross-sectional properties calculated at the center of the web opening. The modification of the residual stresses during the fabrication process results in resistances that lie approximately one buckling curve lower. DOI: 10.1061/(ASCE)ST.1943-541X.0001690. © 2016 American Society of Civil Engineers.
Keywords
Castellated beams, Lateral-torsional buckling, Residual stresses, Numerical simulations, Experiments, ABAQUS, Metal and composite structures

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MLA
Sonck, Delphine, and Jan Belis. “Lateral-Torsional Buckling Resistance of Castellated Beams.” JOURNAL OF STRUCTURAL ENGINEERING, American Society of Civil Engineers (ASCE), 2017, doi:10.1061/(asce)st.1943-541x.0001690.
APA
Sonck, D., & Belis, J. (2017). Lateral-torsional buckling resistance of castellated beams. JOURNAL OF STRUCTURAL ENGINEERING. https://doi.org/10.1061/(asce)st.1943-541x.0001690
Chicago author-date
Sonck, Delphine, and Jan Belis. 2017. “Lateral-Torsional Buckling Resistance of Castellated Beams.” JOURNAL OF STRUCTURAL ENGINEERING. https://doi.org/10.1061/(asce)st.1943-541x.0001690.
Chicago author-date (all authors)
Sonck, Delphine, and Jan Belis. 2017. “Lateral-Torsional Buckling Resistance of Castellated Beams.” JOURNAL OF STRUCTURAL ENGINEERING. doi:10.1061/(asce)st.1943-541x.0001690.
Vancouver
1.
Sonck D, Belis J. Lateral-torsional buckling resistance of castellated beams. JOURNAL OF STRUCTURAL ENGINEERING. 2017;
IEEE
[1]
D. Sonck and J. Belis, “Lateral-torsional buckling resistance of castellated beams,” JOURNAL OF STRUCTURAL ENGINEERING, 2017.
@article{8510535,
  abstract     = {{The existing design expressions for the lateral-torsional buckling behavior of castellated beams conflict. Furthermore, they do not take into account the detrimental effect of the residual stress modification attributable to the fabrication process, which was only recently demonstrated by the authors. This makes these design rules possibly unsafe. In this paper, the lateral-torsional buckling behavior of doubly symmetric castellated beams loaded by a constant bending moment is investigated numerically. The numerical model, including the modified residual stresses, was validated by comparing its results with experimental results. A preliminary design approach is proposed based on the current European guidelines for the calculation of the lateral-torsional buckling resistance of I-section beams. According to the proposed approach, the lateral-torsional buckling resistance of castellated beams can be determined using the cross-sectional properties calculated at the center of the web opening. The modification of the residual stresses during the fabrication process results in resistances that lie approximately one buckling curve lower. DOI: 10.1061/(ASCE)ST.1943-541X.0001690. © 2016 American Society of Civil Engineers.}},
  articleno    = {{04016197}},
  author       = {{Sonck, Delphine and Belis, Jan}},
  issn         = {{0733-9445}},
  journal      = {{JOURNAL OF STRUCTURAL ENGINEERING}},
  keywords     = {{Castellated beams,Lateral-torsional buckling,Residual stresses,Numerical simulations,Experiments,ABAQUS,Metal and composite structures}},
  language     = {{eng}},
  pages        = {{9}},
  publisher    = {{American Society of Civil Engineers (ASCE)}},
  title        = {{Lateral-torsional buckling resistance of castellated beams}},
  url          = {{http://doi.org/10.1061/(asce)st.1943-541x.0001690}},
  year         = {{2017}},
}

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