A new finite element formulation for the lateral torsional buckling analyses of orthotropic FRP-externally bonded steel beams

Autor: Doan-Tan Thi, Nguyen Xuan-Huy, Van Pham Phe
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Curved and Layered Structures, Vol 11, Iss 1, Pp 514-22 (2024)
Druh dokumentu: article
ISSN: 2353-7396
DOI: 10.1515/cls-2024-0011
Popis: The present study develops a new finite element (FE) formulation for the lateral torsional buckling (LTB) analyses of steel beams exteriorly bonded with orthotropic fiber-reinforced polymer (FRP) layers. The formulation considers shear deformations, partial material interaction, local and global warping deformations, and orthotropic FRP properties. The buckling responses of multispan FRP-bonded steel beams predicted by the present solutions are excellently validated against experiment and numerical solutions. As observed, the FRP strengthening is highly effective for the LTB resistance of steel beams. However, the LTB responses are strongly dependent on the orthotropic properties and strengthening lengths of FRP layers. The effects of shear deformations, span ratios, and loading conditions on the LTB responses are also quantified in the present study.
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