- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | YUAN Renan, ZHANG Mingjin, ZHENG Qinggang, FU Zhangong, YU Jisheng. Mechanical Characteristics of Super-Long-Span Cable-Stayed Bridge with Transverse Asymmetrical Load[J]. Journal of Southwest Jiaotong University, 2023, 58(3): 527-534. doi: 10.3969/j.issn.0258-2724.20210279
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In order to study the influence of transverse asymmetrical load on the mechanical characteristics of long-span cable-stayed bridges, this paper takes the Changtai Yangtze River Bridge as the engineering background and analyzes the mechanical characteristics of the bridge with a transverse asymmetrical load. In addition, reasonable control measures are put forward to realize the ideal state of the final bridge. Firstly, a fast optimization method of the cable force is proposed for the cable-stayed bridge with a transverse asymmetrical load. Secondly, asymmetrical upstream and downstream cable forces are used to control the main girder torsion caused by the transverse asymmetrical load. The influences of the unbalanced components along the cable-stayed bridge and the transverse direction of the bridge on the alignment of the main girder and the deviation of the main tower are analyzed. Finally, the method of reducing the secondary dead load of the railway is used to control the deviation of the main tower caused by the transverse asymmetrical load. The results show that the main girder torsion can be effectively controlled by the asymmetrical upstream and downstream cable forces. The transverse bending deformations generated by the unbalanced components along the cable-stayed bridge and the transverse direction of the bridge are basically consistent but opposite in direction, which is beneficial to reduce the transverse bending deformations of the main girder. The transverse deviation of the main tower can be effectively controlled by reducing the difference of the transverse asymmetrical load.
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