具有半刚性节点的自由形式网壳稳定性分析

IF 1.1 Q3 ENGINEERING, CIVIL

Journal of the International Association for Shell and Spatial Structures Pub Date : 2023-06-01 DOI:10.20898/j.iass.2023.016

Bingbing San, Wenhui Zhao, Ye Qiu, Shiwen Han

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引用次数: 0

摘要

本文以具有半刚性节点的自由形式网壳为研究对象，对其稳定性进行了研究。首先，分别进行梯度优化和遗传优化，得到局部最优壳和全局最优壳;利用ANSYS软件对局部和全局最优网壳进行了参数非线性稳定性分析。得到了两种壳体的极限承载力和失稳模态。采用非线性弹簧单元COMBIN39对半刚性节点进行建模。研究了弯曲刚度、扭转刚度、初始几何缺陷和载荷情况对结构的影响。

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Stability Analysis of Free-Form Reticulated Shells With Semi-Rigid Joints

Focusing on the free-form reticulated shells with semi-rigid joints, a stability study is conducted in this paper. Firstly, the gradient-based optimization and genetic optimization are conducted respectively, by which the local optimal shell and the global shell are obtained. A parametrical non-linear stability analysis is performed on the local and global optimal reticulated shells using ANSYS. Then, the ultimate bearing capacity and instability modes of both shells are obtained. The semi-rigid joints are modelled by non-linear spring element, named COMBIN39. The effects of bending stiffness, torsional stiffness, initial geometrical imperfection and load cases are investigated.

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来源期刊

Journal of the International Association for Shell and Spatial Structures ENGINEERING, CIVIL-

CiteScore

1.40

自引率

0.00%

发文量

期刊介绍： The Association publishes an international journal, the Journal of the IASS, four times yearly, in print (ISSN 1028-365X) and on-line (ISSN 1996-9015). The months of publication are March, June, September and December. Occasional extra electronic-only issues are included in the on-line version. From this page you can access one or more issues -- a sample issue if you are not logged into the members-only portion of the site, or the current issue and several back issues if you are logged in as a member. For any issue that you can view, you can download articles as .pdf files.