1 research outputs found
Vibration behavior of thin-walled steel members subjected to uniform bending.
This article reports the results of an investigation on the effects of internal moments
on the vibration behavior of thin-walled steel members. The analyses are based
on the Generalized Beam Theory (GBT), a thin-walled bar theory accounting for crosssection
in-plane deformations ? its main distinctive feature is the representation of the
member deformed configuration by means of a linear combination of cross-section
deformation modes, multiplied by their longitudinal amplitude functions. The study
concerns a simply supported T-section (with unequal flanges) members exhibiting a
wide range of lengths and subjected to uniform internal moment diagrams ? their magnitudes
are specified as percentages of the corresponding critical buckling values. After
providing a brief overview of the main concepts and procedures involved in performing
a GBT-based structural analysis, the vibration behavior of load-free and loaded T-section
members is addressed ? the influence of the applied loadings is assessed in terms of
(i) the fundamental frequency difference and (ii) the change in the corresponding vibration
mode shape. For validation purposes, some GBT results are compared with values
yielded by shell finite element analysis performed in the code ABAQUS (Simulia, 2008)