Construction method of suspension single-cable-plane cable-stayed steel bridge

By employing 3D modeling, temporary support construction, finite element analysis, and the application of TMD vibration reduction devices, the problems of insufficient stiffness and pedestrian vibration in suspended cable-stayed bridges were solved, thereby improving the safety and comfort of the bridges.

CN117536104BActive Publication Date: 2026-05-08CHINA MCC5 GROUP CORP LTD
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Patent Information

Application Number
CN202311409047.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-27
Publication Date
2026-05-08
Estimated Expiration
2043-10-27

AI Technical Summary

Technical Problem

Suspended cable-stayed bridges have a flexible structure with low stiffness. The vibrations can exceed the limits of human comfort, causing pedestrians to panic. Furthermore, the tensioning sequence and cable force control of the stay cables make it difficult to ensure the bridge is subjected to reasonable stress.

Method used

The construction method employs 3D modeling, temporary support system construction, overall stress analysis of cable-stayed bridges, pedestrian comfort vibration reduction analysis, and cable installation and tensioning. It combines finite element analysis software for simulation and monitoring, optimizes cable force values ​​and tensioning sequence, and uses TMD vibration reduction devices to control bridge vibration.

Benefits of technology

Ensuring optimal comfort and safety for pedestrians and reducing construction errors have improved the safety and comfort of the suspended single-cable-stayed steel bridge.

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Abstract

The application discloses a construction method of a suspension single-cable-plane cable-stayed steel bridge, which comprises the following steps: step one, three-dimensional modeling of the cable-stayed bridge; step two, temporary support system erection; step three, integral stress analysis of the cable-stayed bridge; step four, comfort and vibration reduction analysis of the cable-stayed bridge for people walking; and step five, cable installation and tensioning. The application is aimed at the problems of small stiffness of the suspension system single-cable-plane cable-stayed bridge structure, unsatisfied comfort for people walking and difficult asymmetric collaborative tensioning of small cables, utilizes finite element simulation analysis technology, systematically analyzes dynamic characteristics and sensitive frequency ranges under different load conditions and under different walking working conditions, and sets vertical and transverse TMD damping devices, so that the comfort for people walking reaches the best level, and the safety and comfort of the bridge are ensured.
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