A refined model of longitudinally reinforced metal composite wall-beams under steady creep conditions

详细

This paper provides equations describing, to a different degree of accuracy, the bending behavior of longitudinally reinforced metal-composite beams-walls, working under conditions of the steady creep of materials of all phases of composition. From these equations, as partial cases, the correlations of the Bernoulli theory and two versions of the Timoshenko theory are obtained. For statistically definable beams, a simplified version of the specified theory has been developed. Based on the cases of the study of the flexural deformation of hinge-based beam-walls, it is demonstrated that there are such metal compositions, which when used, means that neither classical theory, nor either of the two variants of Timoshenko’s theory can guarantee reliable results regarding amenability even within a 20% level of accuracy, thought of as accessible in the study of the mechanical behavior of structures under the conditions of a steady creep. However, to make reliable calculations, the use of specified theories is needed, allowing for the calculation of the edge effects arising in phase materials in the neighborhood of supporting cross sections.