Journal of South China University of Technology(Natural Science Edition) ›› 2025, Vol. 53 ›› Issue (4): 22-29.doi: 10.12141/j.issn.1000-565X.240092

• Architecture & Civil Engineering • Previous Articles     Next Articles

Nonlinear Buckling Analysis of Cable-Supported Cylindrical Reticulated Shells Considering Initial Eccentricity of Members

JIANG Zhengrong1,2  LIU Xiaoliang1  SHI Kairong1,2  SU Changwang1  ZUO Zhiliang1,2   

  1. 1. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China;

    2. State Key Laboratory of Subtropical Building and Urban Science, Guangzhou 510640, Guangdong, China

  • Online:2025-04-25 Published:2024-08-23

Abstract:

The initial geometric imperfection is one of the important factors affecting the static stability analysis of spatial structures. The current research mainly focuses on the overall imperfection (nodal installation deviation) and the initial curvature of members, but relatively insufficient on the initial eccentricity of members, and the related work has not been involved in the effect analysis of the initial eccentricity of members on the stability bearing capacity of cable-supported cylindrical reticulated shells. In view of this, a simulation method of introducing the initial eccentricity of members by the end rigid rod was proposed in this paper. On this basis, the random imperfection mode method was applied to introduce the initial eccentricity of members in the perfect structure and the overall imperfection structure in turn, then the elasto-plastic overall process analysis was carried out to investigate the effect laws of the initial eccentricity of members and the two kinds of imperfections imposed simultaneously on the nonlinear buckling behaviors of cable-supported cylindrical reticulated shells. The results show that compared with the perfect structure, the coefficients of stability bearing capacity of cable-supported cylindrical reticulated shells are not remarkably reduced when considering the initial eccentricity of members only, and the maximum reduction reaches 8.27%, thus the structure is not much sensitive to the initial eccentricity of members. When considering the overall imperfection and the initial eccentricity of members simultaneously, the coefficients of stability bearing capacity of cable-supported cylindrical reticulated shells are significantly reduced by 27.64%, but the decreasing ranges are slightly smaller than their sums separately introduced by the two kinds of imperfections. The overall imperfection and the initial eccentricity of members introduced in the meantime have a certain extent coupling effect on the stability bearing capacity of cable-supported cylindrical reticulated shells, and the effect of the former is more significant.

Key words: cable-supported cylindrical reticulated shell, initial eccentricity of member; overall imperfection; nonlinear buckling analysis