The present work is intended to study the behaviour of solid steel beam (SSB) under the ISO834 fire curve for different beam slenderness when it is subjected to three-sided exposure and four-sided exposure condition. The properly validated finite element based thermo-mechanical analysis is carried out to predict the performance of SSB under elevated temperature. The present study takes into account the transient temperature effect and the geometrical and material non-linearity. The section selected for this study is a universal beam section UB356×127×39. The considered beam slenderness (span to depth ratio) for this study is varied between 15 to 35, as these slenderness are generally preferred in practice. The eccentric hinge-hinge boundary conditions at the bottom flange are applied to the beam and beam is assumed to be laterally supported at top flange all along its length, and the bottom flange is not restrained laterally along its length. The various parameters considered for the present study include: beam slenderness, load ratios, and exposure condition of the beam under uniformly distributed loading. The performance of SSB under fire is compared using mid-span deflection, lateral displacement, limiting deflection, limiting temperature, and fire resistance time of the SSBs. This study depicts that there is a significant effect of beam slenderness on the behavioural aspect of SSB under elevated temperature.
The column buckling problem was first investigated by Leonhard Euler in 1757. Since then, numerous efforts have been made to enhance the buckling capacity of slender columns, because of their importance in structural, mechanical, aeronautical, biomedical, and several other engineering fields. Buckling analysis has become a critical aspect, especially in the safety engineering design since, at the time of failure, the actual stress at the point of failure is significantly lower than the material capability to withstand the imposed loads. With the recent advancement in materials and composites, the load-carrying capacity of columns has been remarkably increased, without any significant increase in their size, thus resulting in even more slender compressive members that can be susceptible to buckling collapse. Thus, nonuniformity in columns can be achieved in two ways— either by varying the material properties or by varying the cross section (i.e., shape and size). Both these methods are preferred because they actually inherited the advantage of the reduction in the dead load of the column. Hence, an attempt is made herein to present an abridged review on the buckling analysis of the columns with major emphasis on the buckling of nonuniform and functionally graded columns. Moreover, the paper provides a concise discussion on references that could be helpful for researchers and designers to understand and address the relevant buckling parameters.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.