Assessment of serviceability limit state of vibrations in the UHPFRC-Wild bridge through an updated FEM using vehicle-bridge interaction

• The serviceability limit state of vibrations of the UHPFRC-Wild bridge is assessed.
• An iterative method based on the genetic algorithm is developed to update the FEM of Wild bridge.
• A vehicle-bridge interaction model is proposed, using the multibody system with the finite element model.
• A complete road surface roughness is generated based on the PSD and on the isotropy hypothesis.
• Congested traffic flow is considered to analyze the influence of traffic.

The slender designs of bridge imply an important increased susceptibility of bridge structures to traffic-induced vibrations and the Serviceability Limit State (SLS) of vibrations cannot be neglected in the bridge design. An innovative vehicle-bridge interaction model is proposed, in which the vehicles modeled as a multibody system interact with the updated bridge model by means of a contact, considering road surface roughness. An extensive study is performed to explore the influence of different factors on the dynamic vibrations of Wild bridge. The bridge vibrations are not only governed by the fundamental mode, but also are dominated by other torsional modes.