大开口多支柱型铝合金悬挂穹顶结构的静态和稳定性分析

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2024-10-04 DOI:10.1016/j.tws.2024.112529

Jiaming Zeng , Hui Lv , Zhongyi Zhu , Shilin Dong , Yaopeng Liu , Xiaodong Feng , Wei Li , lian Shao

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引用次数: 0

摘要

通过将缆索穹顶结构中多支柱概念的优势与铝合金材料相结合，将下部预应力支撑系统集成到铝合金网状壳体中，开发出了一种新型预应力空间结构--大开口多支柱铝合金悬挂穹顶。通过比较该结构三种上弦网状拓扑结构的静态、稳定性和经济性，确定了最佳结构配置。随后，对最佳网格拓扑结构的静态性能和影响结构稳定性的大型参数进行了分析。研究探讨了结构预应力、整体形状和支撑刚度（包括三个类别和七个参数）对结构稳定性和材料消耗的影响。此外，还进一步研究了初始缺陷和荷载分布形式对结构刚度和稳定性的影响。最后，将该结构的静态特性、稳定性和经济指标与其他两种结构系统（钢结构悬挂穹顶和钢索穹顶）进行了比较。结果表明，五边形网格拓扑结构具有最佳的结构性能，而且该结构对冷却效应非常敏感。确定了关键设计参数的最佳值，如升高跨度比和厚度跨度比。此外，与钢制悬挂穹顶相比，铝合金悬挂穹顶的经济优势弥补了其机械性能的不足。这些发现为铝合金悬索穹顶结构的选择和稳定性设计提供了创新解决方案和科学依据。

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Static and stability analyses of multi-strut type aluminium alloy suspen-dome structure with large opening

By combining the advantages of the multi-strut concept in cable dome structures with aluminum alloy material, a new type of prestressed spatial structure—the multi-strut aluminum alloy suspen-dome with a large opening—has been developed by integrating a lower prestressed support system into an aluminum alloy reticulated shell. The optimal structural configuration was determined by comparing the static, stability, and economic performance of three types of upper chord mesh topologies for this structure. Subsequently, an analysis of the static performance and large-scale parameters affecting the structural stability of the optimal grid topology was conducted. The study explored the influence of structural prestressing, overall shape, and support stiffness—encompassing three categories and seven parameters—on structural stability and material consumption. Additionally, the effects of initial imperfections and load distribution forms on structural stiffness and stability were further examined. Finally, the static properties, stability, and economic indicators of the structure were compared with two other structural systems: the steel suspen-dome and the cable dome. The results indicate that the pentagonal grid topology provides the best structural performance and that the structure is sensitive to cooling effects. Optimal values for key design parameters, such as the rise-span ratio and thickness-span ratio, were identified. Moreover, the economic advantages of the aluminum alloy suspen-dome compensate for its mechanical performance shortcomings compared to the steel suspen-dome. These findings offer innovative solutions and a scientific basis for the selection and stability design of aluminum alloy suspen-dome structures.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.