Volume 36 Issue 11
Jan.  2022
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Ou Tong, Lin Quanpan, Jiang Zhengrong, Shi Kairong. Differentiation Analysis of Vertial Stiffnees and Cable Force Sensitivity of Double-Layer Cable Net and Beam String Structure[J]. STEEL CONSTRUCTION(Chinese & English), 2021, 36(11): 1-7. doi: 10.13206/j.gjgS20062901
Citation: Ou Tong, Lin Quanpan, Jiang Zhengrong, Shi Kairong. Differentiation Analysis of Vertial Stiffnees and Cable Force Sensitivity of Double-Layer Cable Net and Beam String Structure[J]. STEEL CONSTRUCTION(Chinese & English), 2021, 36(11): 1-7. doi: 10.13206/j.gjgS20062901

Differentiation Analysis of Vertial Stiffnees and Cable Force Sensitivity of Double-Layer Cable Net and Beam String Structure

doi: 10.13206/j.gjgS20062901
  • Received Date: 2020-06-29
    Available Online: 2022-01-26
  • Due to the introduction of cable element, the mechanical performance of long-span flexible and semi-rigid structures is significantly improved, so that more structures meeting the requirements of architectural innovation can be realized. In recent years, the above two kinds of structures are widely used in large stadiums and gymnasiums. Scholars at home and abroad have done a lot of theoretical research on them, and the research results have been well used in practical engineering. Due to the difference of the dependence of flexible and semi-rigid structures on cable elements, there are great differences in the vertical stiffness and the sensitivity of cable forces between the two structures, which makes large effects on the actual design and construction.In order to explore the above problems, large-span spoke double-layer cable net and radial beam string structures with the same size were established by using the general finite element software ANSYS, and the corresponding contrast parameters were set for the vertical stiffness and cable force sensitivity, including the equivalent vertical stiffness coefficient G, the cable force sensitivity value TS1 and the cable force sensitivity relative value TS2. Comparative analysis was carried out to guide the design of similar projects.The results showed that: in the process of increasing the external load, the vertical stiffness of the cable net structure had the phenomenon of mutation and slow enhancement. Through tracking and recording the internal force of the circumferential cable (structural cable), it was found that the internal force of the circumferential cable gradually decreased from positive value to 0 (relaxation) at the point of stiffness mutation, which indicated that the relaxation of the circumferential cable led to the mutation of the vertical stiffness of the structure. According to the data analysis, compared with the initial stiffness of the load, the final stiffness of the cable net structure increased by about 3.2%, which could be ignored in the actual analysis because of the small increase. The vertical stiffness of beam string structure was basically unchanged and there was no sudden change of stiffness. When the span was small, the equivalent vertical stiffness G of cable net structure and beam string structure was close. With the increase of span, the equivalent vertical stiffness G of both structures decreased, but the decline rate of cable net structure was much faster than that of beam string structure. Under the same plane layout, the cable force sensitivity TS1 and the relative value TS2 of the cable net structure were greater than that of the beam string structure, which indicated that the cable net structure was less sensitive to the cable force, while the overall stiffness of the beam string structure had been formed in the case of small cable force due to the existence of upper rigid members, which made the structure more sensitive to the cable force. In the process of increasing prestress or reducing span, the sensitivity of cable net and beam string structure to cable force decreased. After comparing the cable force sensitivity value TS1 of cable net and beam string structure, it was found that the TS1 ratio of the two structures was stable between 2.43 and 2.55, which could provide reference for similar projects.
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  • [1]
    姜正荣, 王仕统, 石开荣, 等. 厚街体育馆大跨度椭圆抛物面弦支穹顶结构的非线性屈曲分析[J]. 土木工程学报, 2013, 46(9): 21-28.
    [2]
    陈进于, 区彤, 谭坚. 肇庆新区体育中心钢结构设计[J]. 建筑结构, 2017, 47(6): 12-18.
    [3]
    区彤, 陈进于, 谭坚. 肇庆新区体育馆连体弦支穹顶结构防连续倒塌分析[J]. 建筑结构, 2016, 46(21): 75-79.
    [4]
    周吉林, 周文浩, 陈涛. 珠海横琴国际网球中心大跨度辐射式张弦梁施工技术[J]. 施工技术, 2019, 48(增刊1): 508-510.
    [5]
    闫翔宇, 马青, 陈志华, 等. 天津理工大学体育馆复合式索穹顶结构分析与设计[J]. 建筑钢结构进展, 2019, 21(1): 23-29

    , 44.
    [6]
    杨霄, 张国军, 管志忠, 等. 成都金沙遗址博物馆轮辐式双层索网结构设计研究[J]. 建筑结构, 2009, 39(10): 85-89.
    [7]
    李静斌, 洪彩玲, 张哲, 等. 张弦梁结构张拉力确定方法研究[J]. 郑州大学学报(工学版), 2015, 36(1): 61-65.
    [8]
    古学金. 大跨度马鞍形索网结构的预应力优化及施工仿真分析[D]. 广州: 华南理工大学, 2019.
    [9]
    晏铖. 斜拉-张弦梁协作体系静力特性研究[D]. 南宁: 广西大学, 2016.
    [10]
    夏晨. 轮辐式马鞍形单层索网结构性能分析和设计关键技术研究[D]. 南京: 东南大学, 2016.
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