Strength calculation of reinforced under load steel rod structures elements with multi-parameter loading

The article considers the methodology for structural analysis of reinforced under load open-section steel structure elements for strength with multi-parameter loading. In order to reduce the volume of calculations, the reverse course of solving the strength problem is proposed using the «Section» algorithm in dimensionless parameters. According to the limit state of the rod in the most loaded main section and given relative eccentricities, real acting forces are determined taking into account the elastic-plastic performance of the section.

Theory of block structure in the strength problem of galleries and constructions with multiple connections

It is shown that the boundary-value problem for a layered medium with parallel multiple cavities is reduced to the Riemann vector problem. To solve it, a factorization method is developed, which makes possible to construct the solution to be built in arbitrary approximations.