WP4 emphasized the importance of damping, highlighting its significant impact on the dynamic response of bridges under train loads, particularly near resonance, which affects both design and safety assessments. To address this, the consortium collected and analysed over 1,100 measurements from approximately 90 bridges across five countries, applying advanced estimation methods and benchmarking procedures.

The deliverable provides updated insights and recommendations for more realistic damping values, aiming to improve current normative provisions in the EN 1991‑2. It also proposes potential refinements to bridge type classifications, underscoring scenarios where soil–structure interaction plays a key role, such as portal frame bridges.

With WP4 concluded, InBridge4EU continues its mission to enhance dynamic compatibility between railway bridges and rolling stock. The full document can be consulted here.