This R&D project aims to "Secure and provide integrated solutions to support the entry of domestic construction companies by reflecting the bidding environment of overseas cable bridges," and has set the following core technologies to achieve the final goal.

 CT1-1 : Competitiveness analysis of domestic and foreign reliability-based comparative design and development technology for overseas cable bridges

 CT1-2 : Designing futuristic cable bridge concepts for overseas cable bridges

 CT1-3 : Establishment/operation of cable bridge development technology integration management and utilization support system

 CT1-4 : Development of an integrated management system for cable bridges based on 3D modeling

 CT1-5 : Building a BIM digital model collaboration environment for cable bridge overseas expansion

We performed the development of floating cable bridge design guidelines and conceptual design in the conceptual design of future cable bridges for overseas cable bridges (CT1-2) of this R&D project.

Floating cable-stayed bridges have combined the structural characteristics of conventional fixed cable bridges and floating offshore structures.

 

Floating bridges are subjected to environmental loads that continuously change in magnitude and direction of action depending on environmental characteristics and time, and these dynamic loads induce very complex structural behaviors, including motions in the pylon on top of the floating body and, consequently,  in the cables and cable-supported stiffening girders. Therefore, it is necessary to be able to clearly analyze this inter-complex structural behavior to enable the basic  and detailed design of the main members of the structure.

The basic purpose of this study is to implement a rational analysis method for floating cable supported bridges into a commercial program.

The analysis was performed by applying these analysis techniques to the multi-span suspension bridge modeling, and the analysis results showed that the structure can be highly affected by the rotation spring coefficient of the lower part of the main tower compared to the existing analysis, and the size of the floating body must be increased to control it.