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- Title
RESEARCH ON THE INFLUENCE OF DYNAMIC PARAMETERS ON THE OPERATION PROCESS OF GANTRY CRANES WITH ASSEMBLED STRUCTURES ON THE CAP OF BRIDGE PIER TO SERVE INSTALLATION OF SUPER-T BEAMS.
- Authors
Danh Bui Thanh; Cuong Nguyen Van; Vinh Nguyen Van
- Abstract
The gantry crane, positioned atop the bridge pier cap for the installation of Super-T girders, is a specialized construction unit within the bridge construction industry. The article presents a summary of research results investigating dynamic parameters and their influence on the operation of gantry cranes with assembled structures on the cap of bridge piers, serving the installation of Super-T beams in two scenarios: lifting with pre-stressed cable and moving with load (Super-T beam). To examine the dynamic parameters affecting the operation of the gantry crane, the authors first constructed a dynamic model. Subsequently, the influential parameters were determined, and the Matlab Simulink software was employed to develop a survey model corresponding to different values of each parameter and under various working conditions of the gantry crane. This process aimed to identify patterns and unfavorable values of these parameters affecting the operation of the gantry crane. The research results revealed that in both scenarios of lifting with pre-stressed cable and moving with a load (loading), factors such as lifting speed (Vn), stiffness of the main steel structure (S3), conversion stiffness of the lifting cable (S1), oscillation mass of the main structure (m3), wind load acting on the beam (Pg2), wind load acting on the main steel structure (Pg1), and stiffness of the hanging cable (S1) significantly influence the operation of the gantry crane. The survey results also indicated reasonable values for these influential factors during the operation of the gantry crane. The obtained research results can serve as a basis for computational design problems and effective utilization of gantry cranes with assembled structures on the cap of bridge piers for the installation of Super-T beams. Through analysis and simulation using Matlab-Simulink software, specific data on cable tension, main structure acceleration, and structural deformation were collected. The results emphasize the importance of limiting the lifting speed to 2 m/min to ensure stability during cable tensioned lifting and restricting the crane's moving speed to 7.85 m/min to maintain safety and performance when moving loads with tensioned cables.
- Subjects
GANTRY cranes; GIRDERS; BRIDGE construction industry; DEFORMATIONS (Mechanics); BRIDGE pier caps
- Publication
EUREKA: Physics & Engineering, 2024, Issue 3, p107
- ISSN
2461-4254
- Publication type
Article
- DOI
10.21303/2461-4262.2024.003253