STRESS AND STRAIN STATE OF STEEL SOLID-WALL RODS PRESTRESSED BY LONGITUDINAL WALL DEFOORMATION OF THE STRUCTURE BUCKLING STAGE
The technique of prestressing the rod is given. On the basis of the generalized Hooke's law, it has been established that longitudinal deformations are of decisive importance for the development of the deformation state of the elements of the cross section of a rod. The longitudinal displacement of the wall and brands obtained at the stage of manufacture of the structure. Analytical expressions of normal pre-stresses are formulated. At the prestressing stage, the rod is elongated. In addition to the normal prestresses, the rod bends in the direction opposite to the deflection under load. In this case, the end sections receive additional displacement. Summation of displacements obtained by a squeezed-curved rod at the stage of its prestressing with displacements from bending and loading it with external loads shows that eventually the rod is stretched. An example of the positive effect of additional stretching of a pre-stressed rod on its carrying capacity when loaded with an external load is brought.