FORMULATION OF VLASOV'S ENERG Y THEOREM FOR TIMBER BOX BEAMS

This work applied Vlasov’s theory and principle of minimum potential energy to obtain the equation of equilibrium of timber box beam made of anisotropic material (timber). This equation is similar to that of beam on elastic foundation (BEF). The closed form solution of the obtained equation enabled distortional warping and pure torsional stresses of anisotropic timber box beam to be evaluated. A comparative analysis of the theoretical results (results obtained by analysis of timber box beams using the development here) and the experimental results of the same box beams was carried out and there is rapor between both results even when anisotropic timber of different species box beams of uniform web - flange thickness and variation of web - flange thic knesses were used