This paper aims at describing the tests campaign carried out on five precast bonded post-tensioned concrete bridge beams, recently dismounted after a service life of 50 years. The girders were part of the deck of a recently dismounted viaduct of an Italian motorway. The beams showed different deterioration levels, mainly due to the different exposure to corrosive agents. The test campaign were designed for evaluating the residual load bearing capacity of the members. Dynamic measurements were acquired before and after the static tests by using different excitation sources. This experimental research highlights that the natural frequencies of the beams can be used as a predictor of the ultimate bending moment of an existing structure.

Vibration tests on dismounted bridge beams and the effects of deterioration / Quattrone, Antonino; Matta, Emiliano; ZANOTTI FRAGONARA, Luca; Ceravolo, Rosario; DE STEFANO, Alessandro. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - ELETTRONICO. - 382:(2012). [10.1088/1742-6596/382/1/012059]

Vibration tests on dismounted bridge beams and the effects of deterioration

QUATTRONE, ANTONINO;MATTA, EMILIANO;ZANOTTI FRAGONARA, LUCA;CERAVOLO, Rosario;DE STEFANO, Alessandro
2012

Abstract

This paper aims at describing the tests campaign carried out on five precast bonded post-tensioned concrete bridge beams, recently dismounted after a service life of 50 years. The girders were part of the deck of a recently dismounted viaduct of an Italian motorway. The beams showed different deterioration levels, mainly due to the different exposure to corrosive agents. The test campaign were designed for evaluating the residual load bearing capacity of the members. Dynamic measurements were acquired before and after the static tests by using different excitation sources. This experimental research highlights that the natural frequencies of the beams can be used as a predictor of the ultimate bending moment of an existing structure.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2500372
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