Optimal design of double-level guyed towers against buckling

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research Pub Date : 2024-11-22 DOI:10.1016/j.jcsr.2024.109173

Cheng Ye , Wenhao Pan , Ruhao Wang , Yaozhi Luo

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Abstract

This paper is concerned with the optimal design of double-level guyed towers against buckling with a given material volume. The double-level guyed tower is simplified as a lateral braced column considering the pre-tensioned cable stiffness. The buckling criterion for double-level guyed towers is then analytically derived based on a matrix stiffness method (MSM) that enables the use of one element per member for an exact solution. Optimal designs of double-level guyed towers under various base fixity factors are obtained through an optimization procedure involving two decision variables: the height ratio and the cross-sectional area ratio between the upper level and the lower level. Optimization results indicate that pinned-ended double-level guyed towers achieve their maximum buckling load at a height ratio of 1.19 and a cross-sectional area ratio of 1.19. In contrast, fixed-ended towers achieve their maximum buckling load with a height ratio of 0.70 and a cross-sectional area ratio of 1.13. Transitioning from pinned to fixed base conditions increases the maximum buckling load by approximately 1.52 times. Design recommendations for double-level guyed towers are further presented.

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双层塔架抗屈曲优化设计

本文关注的是给定材料体积下双层盖梁塔抗屈曲的优化设计。考虑到预张拉索刚度，双层锚索塔被简化为横向支撑柱。然后，根据矩阵刚度法（MSM）分析推导出双层锚索塔的屈曲标准，该方法可使每个构件只使用一个元素就能获得精确的解决方案。通过涉及两个决策变量（高度比以及上层和下层之间的横截面积比）的优化程序，获得了不同基座固定系数下双层盖梁塔架的最佳设计。优化结果表明，在高度比为 1.19 和横截面积比为 1.19 时，销端式双层格构塔达到最大屈曲载荷。相比之下，固定端塔架在高度比为 0.70 和横截面积比为 1.13 时可达到最大屈曲荷载。从销钉基座过渡到固定基座条件下，最大屈曲载荷增加了约 1.52 倍。此外，还进一步介绍了双层索基塔的设计建议。

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 Constructional Steel Research 工程技术-工程：土木

CiteScore

7.90

自引率

19.50%

发文量

550

审稿时长

46 days

期刊介绍： The Journal of Constructional Steel Research provides an international forum for the presentation and discussion of the latest developments in structural steel research and their applications. It is aimed not only at researchers but also at those likely to be most affected by research results, i.e. designers and fabricators. Original papers of a high standard dealing with all aspects of steel research including theoretical and experimental research on elements, assemblages, connection and material properties are considered for publication.