crossbar, column, multi-storey building, body forces, physical nonlinearity, concrete deformation diagram, longitudinal-transverse bending, static determinability, bending moment, composites

The paper considers a multi-storey building made of reinforced concrete. As a constructive scheme, a braced building frame with a transverse arrangement of frames was chosen. Columns and crossbars are considered as multilayer composite reinforced concrete structures. The calculations take into account the physical nonlinearity of strain diagrams and the difference in ultimate strains in tension and compression of the constituent phase materials of the rods, taking into account their mass loads. Ratios are given for the limiting values of loads at which the deformation does not exceed the corresponding limiting values in tension and compression in each of the phase materials of the columns and crossbars. Relationships for determining forces, moments, deformations and deflections in the considered bar structures are given.

Nemirovskii Yuri Vladimirovich, Dr. Sci. Phys. & Math., Professor, Leading Research Worker, S. Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the RAS, Novosibirsk, Russia, Novosibirsk state technical University, Novosibirsk, Russia.

Tikhonov Sergey Vladimirovich, PHD, Assoc. Prof., I. Ulyanov Chuvash State, Cheboksary, Russia