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[1] Zhu Li, Meng Bowen, Huo Xuejin, Liu Wei, et al. Cable force optimization of cable-stayed bridges based on the influence matrix and elite genetic algorithm [J]. Journal of Southeast University (English Edition), 2024, 40 (2): 129-139. [doi:10.3969/j.issn.1003-7985.2024.02.003]
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Cable force optimization of cable-stayed bridges based on the influence matrix and elite genetic algorithm()
基于影响矩阵和精英遗传算法的斜拉桥索力优化
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
40
Issue:
2024 2
Page:
129-139
Research Field:
Civil Engineering
Publishing date:
2024-06-13

Info

Title:
Cable force optimization of cable-stayed bridges based on the influence matrix and elite genetic algorithm
基于影响矩阵和精英遗传算法的斜拉桥索力优化
Author(s):
Zhu Li1;  Meng Bowen1;  Huo Xuejin2;  Liu Wei1
1School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
2China Railway Major Bridge Reconnaissance and Design Institute Co., Ltd., Wuhan 430050, China
朱力1;  孟博文1;  霍学晋2;  刘伟1
1北京交通大学土木建筑工程学院, 北京 100044; 2中铁大桥勘察设计研究院有限公司, 武汉 430050
Keywords:
cable-stayed bridge;  cable force optimization;  minimum bending moment energy;  influence matrix;  genetic algorithm;  feasible domain
斜拉桥;  索力优化;  最小弯矩能;  影响矩阵;  遗传算法;  可行域
PACS:
TU3
DOI:
10.3969/j.issn.1003-7985.2024.02.003
Abstract:
The limitations of conventional cable force optimization methods, which fail to automatically optimize and consider the overall performance of the bridge structure, as well as the drawbacks of extensive calculations, lengthy processing time, low efficiency, and slow convergence speed, when combined with intelligent optimization algorithms, should be addressed. Ansys and Matlab are used as the structural calculator and master control programs, respectively, with the minimum bending moment energy as the control objective.Moreover, the influence matrix and elite retention strategy are incorporated into the genetic algorithm to optimize the cable force during the bridge formation stage. This method can simultaneously account for the force characteristics of the main girder and pylon. Utilizing the influence matrix, the issue that each generation requires finite element evaluation can be resolved, thereby drastically reducing the amount of calculation. In addition to capitalizing on the benefits of the conventional influence matrix method, the proposed approach considers the iterative process of parameter selection and permits the addition of special constraint requirements to critical sections of the structure, thereby enhancing the realism of the optimization procedure. Furthermore, the introduction of the elite retention strategy enhances the convergence speed and stability of evolutionary iterations. Finally, a practical engineering application is utilized to validate the viability of the proposed method.
由于传统索力优化方法不能自动优化和兼顾全桥结构性能, 以及与智能优化算法相结合后存在计算量大、耗时长、效率低和收敛速度慢等缺点, 以Ansys和Matlab分别作为结构计算器和主控程序, 以最小弯矩能为控制目标, 将影响矩阵和精英保留策略引入到遗传算法中, 实现成桥阶段的索力优化.该方法能够同时兼顾主梁与主塔的受力特性, 而且影响矩阵的应用可以解决每一代都需要有限元评估的问题, 大大减少了计算量.与传统的影响矩阵法相比, 所提方法在吸取影响矩阵法优点的基础上, 还考虑参数迭代过程, 可在结构的关键截面添加特殊的约束要求, 使得优化过程更加符合实际, 而精英保留策略的引入可以提高进化迭代收敛的速度与进化过程的稳定性.最后, 通过一个实际工程应用验证了所提方法的可行性.

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Memo

Memo:
Biography: Zhu Li(1986─), male, doctor, professor, zhuli@bjtu.edu.cn.
Foundation item: The National High-Level Youth Talent Project in 2023.
Citation: Zhu Li, Meng Bowen, Huo Xuejin, et al. Cable force optimization of cable-stayed bridges based on the influence matrix and elite genetic algorithm[J].Journal of Southeast University(English Edition), 2024, 40(2):129-139.DOI:10.3969/j.issn.1003-7985.2024.02.003.
Last Update: 2024-06-20