Dynamic identification and collapse assessment of Rubbianello Bridge

Laura Ragni, Fabrizio Scozzese, Fabrizio Gara, Enrico Tubaldi

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

This paper investigates the causes of failure of Rubbianello Bridge, a multi-span masonry arch bridge located in Central Italy, which suffered the collapse of two of the seven spans due to foundation scour during a very severe flood in December 2013 and the collapse of two more spans during another major flood event in 2016. An accurate nonlinear 3D model of the bridge is developed. The elastic properties of the model are calibrated based on both material tests and an experimental campaign carried out for the dynamic identification (in terms of vibration frequencies and modal shapes) via operational modal analysis of the remaining part of the bridge. A numerical simulation of the scour hole progression is performed in order to identify the collapse mechanism of the bridge under the first major flood and estimate the level of scour that caused the bridge failure.
Original languageEnglish
Title of host publicationTowards a Resilient Built Environment Risk and Asset Management
Subtitle of host publicationIABSE Symposium Guimarães 2019
Place of PublicationZurich, Switzerland
Pages619-626
Number of pages8
DOIs
Publication statusPublished - 29 Mar 2019

Keywords

  • bridges
  • FEM
  • masonry
  • collapse
  • ABAQUS
  • scour
  • operational modal analysis

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