The longitudinal-transverse bending of multilayered concrete rods taking into account the influence of gravity

The paper considers the problem of longitudinal-transverse bending of a multilayered concrete rod taking into account the influence of gravity. The law of deformation of each layer of the rod is adopted in the form of approximation by a polynomial of the second order. The main purpose in this work is to study the influence of gravity on the ability of the rod to withstand the applied loads. In this work, the achievement by the maximum deformation the limit allowable value in one or several layers of the rod under tension or compression, corresponding to the points of transition to the descending branch in the deformation diagram, is accepted as a criterion for the conditional limit state. The approximate solutions of these problems are found by the Bubnov-Galerkin method. (paper)