Advances in Constructional Engineering

Seismic design for long-span bridges is a crucial element in ensuring the safety of transportation infrastructure. This paper reviews the current status and challenges of seismic design, and explores the application of innovative methods such as performance-based design concepts, nonlinear analysis techniques, and seismic isolation and energy dissipation technologies in enhancing bridge seismic performance. Through multidisciplinary collaborative design, which integrates factors such as site conditions and material properties, the overall optimization of the structural system can be achieved. The application practices in new construction projects demonstrate that these methods effectively improve the seismic capacity and resilience of bridges. In the future, seismic design will focus more on multi-hazard resilience, sustainability, and intelligent development, providing more comprehensive seismic protection for bridge engineering.

Long-span bridges; Seismic design; New construction projects; Application cases; Optimization strategies