Abstract
This paper intends to propose a lateral-torsional buckling (LTB) theory of pre-stressed simple/cantilever steel beams with deviators subjected to compression and end moments in which their cross sections are mono-symmetric, initially tensions are introduced by rectilinear single/double tendons, and discrete un-bonded/bonded deviators are taken into account. Firstly, in-plane linear solutions of the PS system are presented under combined compression and moments. After that, analytically exact buckling solutions and approximate Ritz solutions are obtained based on the total potential energies derived. As a result, it is demonstrated that both exact and Ritz solutions by this study are very well matched with FE solutions by Abaqus. In addition, pre-tension effects on LTB behaviors of the PS beams are investigated with increase of the number of deviators.
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