Journal of South China University of Technology(Natural Science) >
Stability Analysis of Cable-Supported Cylindrical Reticulated Shells Considering Initial Eccentricity of Members
Received date: 2024-03-04
Online published: 2024-08-23
Supported by
the Natural Science Foundation of Guangdong Province(2022A1515011115)
Currently, there is relatively limited research on the stability analysis of spatial structures considering the initial eccentricity of members. To reveal the influence laws of the initial eccentricity of members on the stability bearing capacity of cable-supported cylindrical reticulated shells, this paper proposed a simulation method of introducing the initial eccentricity of members by the end rigid rod and presented the ratio relationship of the elastic modulus between the rigid rod and the initial eccentric rod. Based on this, the random imperfection mode method was used to sequentially introduce the initial eccentricity of members into the perfect structure and the overall imperfect structure. An elasto-plastic process analysis was then conducted to examine the impact of the initial eccentricity of members and the simultaneous application of two types of imperfections on the nonlinear buckling behavior of cable-supported cylindrical reticulated shells. The results show that when the elastic modulus of the rigid rod is taken to be more than 100 times of that of the initial eccentric rod, the calculation results show minor differences. Therefore, the ratio of the elastic modulus between them is taken as 100. The coefficients of stability bearing capacity of cable-supported cylindrical reticulated shells are not remarkably reduced when introducing the initial eccentricity of members into the perfect structure (the maximum reduction is 8.27%), indicating that the structure is not very sensitive to the initial eccentricity of members, thus the adverse effects of the initial eccentricity of members can be ignored in engineering practice by balancing the calculation work. Compared with the perfect structure, the coefficients of stability bearing capacity of cable-supported cylindrical reticulated shells are significantly reduced by 27.64% when introducing the initial eccentricity of members into the overall imperfect structure. However, the reductions are slightly smaller than the sums of reductions when the two kinds of imperfections are introduced separately. The overall imperfection and the initial eccentricity of members introduced simultaneously have a certain extent coupling effect on the structural stabi-lity bearing capacity, and the effect of the former is more significant.
JIANG Zhengrong , LIU Xiaoliang , SHI Kairong , SU Changwang , ZUO Zhiliang . Stability Analysis of Cable-Supported Cylindrical Reticulated Shells Considering Initial Eccentricity of Members[J]. Journal of South China University of Technology(Natural Science), 2025 , 53(4) : 22 -29 . DOI: 10.12141/j.issn.1000-565X.240092
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