Clarification of Normative Expressions for Determining Annular Critical Stresses of Buckling under the Influence of Wind Load
V. F. Mushchanov, M. N. Tcepliaev, A. V. Zubenko
Donbas National Academy of Civil Engineering and Architecture
Annotation: This article is a logical continuation of the study of the rational arrangement of stiffness rings on the cylindrical walls of vertical tanks. In particular, the problem of taking into account the actual distribution of wind pressure on the cylindrical wall of the tank using the finite element method is considered. This allowed us to dertemine the reserves of the bearing capacity of the shell in comparison with the standard values of critical stresses. The reserves are provided due to reduced critical stresses, which give analytical expressions in connection with the reduction of the shape of the wind flow to uniform ring compression. Using the improved methodology for calculating the safety factor, it became possible to determine the coefficients of its increment for a different number of stiffness rings. The obtained refinements allow us to enter coefficients to the normative expressions that determine the values of the ring critical loads of stability loss, through which the rational step of the reinforcing rings of stiffness is assigned. Cases of the shell with ideal geometry and in the case of a defect in the form of the angularity of the vertical weld are considered.
Keywords: vertical cylindrical tank, wind load, stress, finite element method, cylindrical shell, local imperfections.
Pages: 25-35.
Link for citation: Mushchanov, V. F.; Tcepliaev, M. N.; Zubenko, A. V. Clarification of Normative Expressions for Determining Annular Critical Stresses of Buckling under the Influence of Wind Load. – Text : electronic. – In: Metal Constructions. – 2020. – Vol. 26, N 1. – Р. 25-35. – URL: https://donnasa.ru/publish_house/journals/mk/2020-1/03_mushchanov_tcepliaev_zubenko.pdf (date of access: 03.07.2024). (in Russian)
Vol. 26, N 1 (2020)Journal: Metal Constructions
Publish house: Donbas National Academy of Civil Engineering and Architecture