Stability bearing capacity of long-span aluminum alloy single-layer reticulated shells accounting for rigidity of gusset joints

被引：0
|
作者：
Liu J. [1 ]
Zhou J. [2 ,3 ]
Wang R. [1 ]
Zheng X. [2 ,3 ]
Zhao Y. [1 ]
机构：
[1] Space Structures Research Center, Zhejiang University, Hangzhou
[2] Center for Balance Architecture, Zhejiang University, Hangzhou
[3] The Architectural Design & Research Institute of Zhejiang University Co., Ltd, Hangzhou
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2022年 / 43卷
关键词：
aluminum alloy single-layer reticulated shell; gusset joint; nonlinear analysis; semi-rigid behavior; stability bearing capacity;
D O I：
10.14006/j.jzjgxb.2022.S1.0002
中图分类号：
学科分类号：
摘要：
Aming at the aluminum alloy Kiewitt-type single-layer reticulated shell structures applied to the roof of large cylindrical storage tanks (with diameters of 60 m, 80 m, and 100 m), the bending moment-rotation curves of gusset joints were obtained by fine numerical simulation. Based on the space beam element-virtual spring element model, the semi-rigid behavior of joints was introduced to the finite element model of reticulated shells, and a large-scale parametric study including nearly 1 500 numerical examples was carried out to analyze the stability behavior of aluminum alloy single-layer reticulated shells with different spans, rise-to-span ratios, and grid forms. The results show that the semi-rigidity of joints, material nonlinearity, and initial geometric imperfections lead to the reduction of stability capacity of aluminum alloy single-layer reticulated shells with gusset joints. The effects of material nonlinearity and joint semi-rigidity are relatively small, and their reduction degree of stability capacity is less than 8% and 16%, respectively. Initial geometric imperfections have a great influence, and the stability capacity is weakened by 50% - 65% . On this basis, the calculation formula of stability capacity of Kiewitt-type aluminum alloy single-layer reticulated shells considering the effects of joint rigidity, geometric nonlinearity, material nonlinearity, and initial geometric imperfections is obtained by regression, which is convenient for the structural selection design of aluminum alloy reticulated shells in storage tanks. © 2022 Science Press. All rights reserved.
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页码：10 / 19
页数：9
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