Nonlinear buckling analysis for a trimmed irregular Kiewitt single-layer spherical shell structure

被引：2

作者：

He, Sheng ^{[1
]}

Chen, Qingjun ^{[1
,2
,3
]}

Jiang, Zhengrong ^{[1
,2
]}

Lai, Hongtao ^{[4
]}

Liu, Hongliang ^{[1
]}

机构：

[1] School of Civil Engineering and Transportation, South China University of Technology, Guangzhou

[2] State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou

[3] Centre for Infrastructure Engineering and Safety, The University of New South Wales, UNSW Sydney

[4] Architecture Design & Research Institute, South China University of Technology, Guangzhou

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2015年 / 46卷 / 02期

关键词：

Initial geometric imperfection; Irregular edges; Kiewitt spherical latticed shell; Nonlinear buckling; Openings;

D O I：

10.11817/j.issn.1672-7207.2015.02.044

中图分类号：

学科分类号：

摘要：

The nonlinear buckling behavior of a trimmed irregular Kiewitt single-layer spherical shell structure was investigated by introducing the irregularity caused by the openings of the dome, the changes of vertical and horizontal stiffness of the support arch beams, unsymmetrical distribution of live loads, initial geometric imperfection, geometric nonlinearity and material elastic-plasticity. The nonlinear load-displacement whole process of this structure was analyzed by using the finite element software ANSYS. The results show that compared with perfect spherical latticed shell, the stability of this trimmed spherical shell is considerably reduced. The vertical stiffness of the support arch beams has greater influence on the stability of this structure than the horizontal stiffness. Using the consistent imperfect buckling analysis method, the coefficient of stable bearing capacity usually is not minimal. A 1/400 of the span can be appropriately taken as the maximum value of initial geometric imperfection. The material nonlinearity might have significant effects on the stability of this trimmed spherical shell. The unsymmetrical distribution of live loads does not have adverse impact on the stability of the structure. ©, 2015, Central South University of Technology. All right reserved.

引用

页码：701 / 709

页数：8

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