Dynamic Response of Steel Truss Bridge With a Reinforced Concrete Deck Slab Under High-Speed Train Passage

Key Points

• The aim is to clarify the dynamic response characteristics of the main components of a steel truss bridge with a reinforced concrete deck during train passage.
• Conducted field measurements to assess deflection and frequency characteristics during train passage.
• Performed finite element analysis on the bridge's deck to evaluate increased rigidity.
• Analyzed dynamic interaction of the entire steel truss bridge system during train passage.
• The rigidity of the bridge deck increased approximately eightfold due to the inclusion of the slab.
• The bending vibration mode significantly influenced the deflection and axial force responses of the main components during train passage.
• The impact coefficient for the main components can be assessed using existing RC standards for train speeds up to about 400 km/h.