2024 Volume 80 Issue 13 Article ID: 23-13157
This paper proposes a seismic design flow for a four-pylon multi-span cable-stayed bridge of an unprecedented scale in the structural planning phase to realize the planning concept, and reports the details of the study based on the flow. The optimal support conditions for the basic structure of the bridge are studied, the structural characteristics are clarified based on these conditions, and a seismic strategy is established based on the evaluation of the fracture process by buckling eigenvalue analysis. Next, scenario seismic motions are set for the revised basic structure based on the bridge conditions, performance requirements are proposed, and verification results based on these requirements are presented. Finally, the damage sequence is confirmed by pushover analysis and incremental dynamic analysis, and it is verified that the desired failure process is achieved. The results show the effectiveness of the seismic structural planning flow in the structural planning phase.
