Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Lateral-torsional buckling of partially protected steel I-beams exposed to fire
Abstract This paper proposes a new model for thin-walled open profiles able to predict bending-torsion buckling of thermally restrained steel I beams with bi- and mono-symmetric cross-sections. Refined nonlinear kinematics accounts for the shifts of the centroid and shear centre generated by the thermal gradient. The eigenvalue problem derived from geometrically nonlinear balance equations is solved via power series and Newton-Raphson technique. Several examples are presented; the results are compared with those provided by Abaqus simulation and the literature.
Graphical abstract Display Omitted
Highlights A refined kinematics of thin-walled beams taking into account the thermal gradient effect is proposed. This model accounts for the shifts of the centroid and shear centre generated by the thermal gradient. The present results are in good agreement with those provided by the literature and Abaqus simulation. Fire-resistance of the Bi- and inverted mono-symmetric beams is better than that of the mono-symmetric beams. The beams with a bi-symmetric section subjected to a thermal gradient behave like those of the mono-symmetric sections.
Lateral-torsional buckling of partially protected steel I-beams exposed to fire
Abstract This paper proposes a new model for thin-walled open profiles able to predict bending-torsion buckling of thermally restrained steel I beams with bi- and mono-symmetric cross-sections. Refined nonlinear kinematics accounts for the shifts of the centroid and shear centre generated by the thermal gradient. The eigenvalue problem derived from geometrically nonlinear balance equations is solved via power series and Newton-Raphson technique. Several examples are presented; the results are compared with those provided by Abaqus simulation and the literature.
Graphical abstract Display Omitted
Highlights A refined kinematics of thin-walled beams taking into account the thermal gradient effect is proposed. This model accounts for the shifts of the centroid and shear centre generated by the thermal gradient. The present results are in good agreement with those provided by the literature and Abaqus simulation. Fire-resistance of the Bi- and inverted mono-symmetric beams is better than that of the mono-symmetric beams. The beams with a bi-symmetric section subjected to a thermal gradient behave like those of the mono-symmetric sections.
Lateral-torsional buckling of partially protected steel I-beams exposed to fire
Hadj Doula, Moustafa (Autor:in) / Ziane, Noureddine (Autor:in) / Ruta, Giuseppe (Autor:in) / Meftah, Sid Ahmed (Autor:in)
20.06.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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