In a dramatic car accident that occurred in January 2017, a touring coach hit at high speed one pillar of the highway overpass at the Verona-Est exit of the A4 motorway (Italy). This was followed by a violent fire that affected the support portal and part of the decking intrados, consisting of post-tensioned box beams. In order to assess the damage suffered by the structure, the effects of impact and exposure to high temperatures were analyzed separately. Regarding the first issue, the numerical models of the bridge calibrated on the basis of dynamic characterization tests included the contribution of the inertial forces and the effect of the higher intensity of the impulsive force in the first stage of the impact. With reference to the effects of high temperature, a general survey and more detailed analyses have been carried out, using both traditional techniques and more advanced methods. This allowed forming a clear picture of the damage suffered, coordinated with the model-ling of the fire scenario.

Proceedings of Italian Concrete Days 2018 (ICD 2018)

R. Felicetti
2018-01-01

Abstract

In a dramatic car accident that occurred in January 2017, a touring coach hit at high speed one pillar of the highway overpass at the Verona-Est exit of the A4 motorway (Italy). This was followed by a violent fire that affected the support portal and part of the decking intrados, consisting of post-tensioned box beams. In order to assess the damage suffered by the structure, the effects of impact and exposure to high temperatures were analyzed separately. Regarding the first issue, the numerical models of the bridge calibrated on the basis of dynamic characterization tests included the contribution of the inertial forces and the effect of the higher intensity of the impulsive force in the first stage of the impact. With reference to the effects of high temperature, a general survey and more detailed analyses have been carried out, using both traditional techniques and more advanced methods. This allowed forming a clear picture of the damage suffered, coordinated with the model-ling of the fire scenario.
2018
Proceedings of Italian Concrete Days 2018 (ICD 2018)
impact; dynamic identification; fire scenario
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1200540
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