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Investigation of cylindrical mesh shell with increased stiffness of supporting ribs

Abstract

Investigation of cylindrical mesh shell with increased stiffness of supporting ribs

Siyanov A.I.

Incoming article date: 20.12.2019

The work of a metal cylindrical mesh shell with support ribs of increased rigidity is investigated. The rational variant of the profile of longitudinal elements is determined and the recommended parameters of the cross-section of the rods in the place of strengthening of the lower faces are proposed. Several approaches to circuit design were tested and cross-sections were calculated for three blocks of design solutions. It is recommended to use the I-beam profile as the optimal option to increase the coefficient of stability of the structure. Due to the increased rigidity of the support ribs, a significant unloading of dangerous areas was obtained and the form of possible deformation of the system was reconstructed. Qualitative regularities of distribution of longitudinal forces and displacements reflecting positive changes of the general state of the grid surface are revealed. The obtained numerical values of the calculated parameters showed the presence of reserves of the bearing capacity of the structure.

Keywords: cylindrical mesh shell, roof, reinforcement, stiffness of supporting ribs, force factor, deformation parameter