Techno Press
Techno Press

Steel and Composite Structures   Volume 28, Number 4, August25 2018, pages 403-414
DOI: http://dx.doi.org/10.12989/scs.2018.28.4.403
 
Lateral-torsional buckling of functionally graded tapered I-beams considering lateral bracing
Mohammad Rezaiee-Pajand, Amir R. Masoodi and Ali Alepaighambar

 
Abstract     [Full Text]
    In this paper, the lateral-torsional buckling of axially-transversally functionally graded tapered beam is investigated. The structure cross-section is assumed to be symmetric I-section, and it is continuously laterally supported by torsional springs through the length. In addition, the height of cross-section varies linearly throughout the length of structure. The proposed formulation is obtained for the case that the elastic and shear modulus change as a power function along the beam length and section height. This structure carries two concentrated moments at the ends. In this study, the lateral displacement and twisting angle relation of the beam are defined by sinusoidal series. After establishing the eigenvalue equation of unknown constants, the beam critical bending moment is found. To validate the accuracy and correctness of results, several numerical examples are solved.
 
Key Words
    functionally graded material; lateral and torsional buckling; tapered beam; warping; continuous torsional bracing
 
Address
Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, Iran.
 

Techno-Press: Publishers of international journals and conference proceedings.       Copyright © 2019 Techno Press
P.O. Box 33, Yuseong, Daejeon 305-600 Korea, Tel: +82-42-828-7996, Fax : +82-42-828-7997, Email: technop@chol.com