Coupling Effect of Member Eccentricity and Nodal Deviation on Stability of Kiewitt Reticulated Shell

IF 1.1 Q3 ENGINEERING, CIVIL

Journal of the International Association for Shell and Spatial Structures Pub Date : 2022-03-01 DOI:10.20898/j.iass.2022.003

Hui-jun Li, Y. Taniguchi

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引用次数: 0

Abstract

Single-layer reticulated shell is a kind of imperfection-sensitive structure, and its stability is influenced by many factors, especially geometric imperfections. To investigate the effect of nodal deviation, member eccentricity and their couplings on stability of reticulated shell with welded hollow sphere joint, a Kiewitt-6 single-layer reticulated shell with aforementioned two kinds of imperfections are chosen as numerical models. A mechanical model of single-layer reticulated shell which can take nodal deviation and member eccentricity simultaneously into consideration is firstly put forward. Secondly, implementation steps of the above- mentioned two imperfections in reticulated shell are demonstrated in detail. Then quantify the influence of nodal deviation, member eccentricity and their couplings with different magnitudes on stability of single-layer reticulated shell. The results show that nodal deviation has adversely remarkable impact on limit load of reticulated shell, while member eccentricity affects limit load of reticulated shell to a small extent. With the increase of nodal deviation, the influence of member eccentricity on limit load gradually decreases. The reduction effect of member eccentricity on limit load of reticulated shell has a close relationship to the magnitude of nodal deviation. The developed mechanical model of single-layer reticulated shell with nodal deviation and member eccentricity and implementation steps can be generalized to other space frame structures.

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构件偏心和节点偏差对基维特网壳稳定性的耦合影响

单层网壳结构是一种缺陷敏感结构，其稳定性受多种因素的影响，尤其是几何缺陷。为研究节点偏差、构件偏心及其耦合对空心球焊接网壳稳定性的影响，选取具有上述两种缺陷的Kiewitt-6单层网壳作为数值模型。首先提出了同时考虑节点偏差和构件偏心的单层网壳力学模型。其次，详细论证了上述两种缺陷在网壳中的实现步骤。然后定量分析了节点偏差、构件偏心及其不同量级耦合对单层网壳稳定性的影响。结果表明:节点偏差对网壳极限荷载有显著的不利影响，而构件偏心对网壳极限荷载影响较小;随着节点偏差的增大，构件偏心对极限荷载的影响逐渐减小。节点偏差的大小与构件偏心对网壳极限荷载的减小作用密切相关。所建立的考虑节点偏差和构件偏心的单层网壳力学模型及其实施步骤可推广到其他空间框架结构。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.