To the Question of Redistribution of Stress in Vertical Bearing Rc Structures Multi-Story Buildings

Abstract

In this paper, resistance the shear lintels in multi-story buildings is considered, since the main static purpose of vertical butt joints in the form of lintels is to ensure the perception of shear forces arising from the joint operation of the mating walls. The object of the study was a fragment of a monolithic building, the thickness of the walls of which was 300 mm, and the height of the building was 12 floors. As a result of the conducted numerical studies, the stress-strain state of the vertical load-bearing structures of monolithic buildings and the shear deformations along all the lintels along the height of the building were determined. It was found that some of the lintels are in the elastic stage of operation due to a low level of shearing forces. A number of building lintels connecting vertical structures with a significant vertical load drop are in the plastic stage of work. The results of stress redistribution, given in this article, can be used when calculating the bearing systems of monolithic buildings, taking into account the nonlinear compliance of shear bonds.