Development of a Quantitative Evaluation Method for Earthquake Robustness of Railway Bridges and Viaducts

Key Points

• The aim is to develop a method to quantitatively evaluate the earthquake robustness of railway bridges and viaducts under varying conditions.
• Developed a robustness function to express tolerable variability in structural performance.
• Applied the method to multiple railway viaducts with varying spans to assess earthquake robustness quantitatively.
• Focused on material properties, ground properties, and seismic actions.
• Conducted evaluations based on structural vibration characteristics.
• Confirmed that structures with more spans exhibit reduced variability in vibration characteristics.
• Demonstrated an improvement in earthquake robustness with increased span number.
• Provided a quantitative means to incorporate earthquake robustness into seismic design and reinforcement practice.