Journal of Engineering Research

He structural response of long-span municipal bridges under seismic conditions is complex, posing significant safety risks. To enhance the seismic performance of these bridges, this study proposes a seismic design method based on multi-parameter collaborative optimization, which integrates the selection of structural systems, improvement of construction details, and seismic isolation and damping technologies. A numerical analysis model is established, and typical seismic input is used for response analysis and performance evaluation. This optimized design method can significantly improve the structural toughness and stability, reduce the risk of seismic damage in critical areas, and provide effective technical support for the seismic safety of long-span bridges.

Long-Span bridges; Seismic design; Optimization methods; Safety evaluation; Structural response