Special stability of reinforced concrete structures in aggressive environments

Abstract

When investigating the spatial stability of frames, it is necessary to take into account not only the action of the compressive longitudinal forces on the structural elements, but also the torques. Problems of loss of stability of the rods under the action of torques, as well as under the combined action of longitudinal forces and torques, were considered earlier, however, only cases of constant cross sections along the length have been considered, i.e. cases with constant bending stiffnesses. When considering the influence of an aggressive medium, it is necessary to consider cases of variable cross sections, what considerably complicates the solution of the problem. One of the methods of solutions is the transition from the study of the stability of a rod with a continuous variable stiffness along the length of the rod to the study of stability under the action of the longitudinal force and the torque of the rod with piecewise constant stiffness (that is, the stepped rod). With the help of this method, the stability of an RC column under the influence of an aggressive medium has been studied.