Geometric nonlinear analysis of thin elastic paraboloid of revolution shaped shells with radial waves

RUDN Journal of Engineering Researches

Prosper Ngandu¹  Mathieu Gil-oulbé¹  Aleksey S. Markovich¹  Svetlana V. Anosova¹ 

[1] Peoples’ Friendship University of Russia (RUDN University);

关键词: paraboloid of revolution with radial waves;    physical nonlinearity;    contact nonlinearity;    boundary condition nonlinearity;    thin shell;   

DOI  :  10.22363/2312-8143-2020-21-3-208-214

来源: DOAJ

【 摘 要 】

From the old ancient types of roof and dome construction, various forms of shells have been discovered which attract special attention. A shell is a structure composed of sheet material so that the curvature plays an important role in the structural behaviour, realizing its spatial form. There are different types of shells, namely thick and thin shells. G. Brankov, S.N. Krivoshapko, V.N. Ivanov, and V.A. Romanova made interesting researches of shells in the form of umbrella and umbrella-type surfaces. The term nonlinear refers to a given structure undergoing a change in stiffness in its loaded state. There are basically three different types of nonlinearities: geometric, physical and contact (boundary condition nonlinearity). For further analysis of the stress-strain state, a paraboloid with an inner radius of 4 m and an outer radius of 20 m and the number of waves equal to 6 was considered. The test shell is made of reinforced concrete. The minimum load parameter at which the shell loses stability indicates a more than three times the margin.

【 授权许可】

Unknown