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Numerical and experimental assessment of the seismic vulnerability of an existing bridge in presence of carbonation-induced corrosion.

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Title: Numerical and experimental assessment of the seismic vulnerability of an existing bridge in presence of carbonation-induced corrosion.
Authors: Reale, Simone1 (AUTHOR) simone.reale01@universitadipavia.it, Furinghetti, Marco1,2 (AUTHOR), Pavese, Alberto1 (AUTHOR)
Source: Soil Dynamics & Earthquake Engineering (0267-7261). Jan2026:Part B, Vol. 200, pN.PAG-N.PAG. 1p.
Subjects: Carbon steel corrosion, Deterioration of materials, Structural dynamics, Bridge testing, Model validation, Reinforced concrete, Earthquake hazard analysis
Abstract: Italian existing bridges have been in many cases built during the second half of XX century and are close to or have already exceeded their intended design life. Important deterioration phenomena can be present, impacting the structural response and the seismic reliability of the system. Among the possible deterioration phenomena present in an existing bridge, corrosion plays a key role altering significantly the response of Reinforced Concrete (RC) members over time. This paper presents part of the research activities carried out by the authors within the project DPC-ReLUIS 2022-24 WP3 on seismic risk and reliability of existing bridges. A case study bridge is presented and analyzed in three sites representative of low, moderate and high seismic hazard. The case study is analyzed in both pristine and corroded condition. The corrosion scenario considered in the work has been validated through comparison with the results of an extensive experimental campaign. The results reveal that corrosion significantly reduces the seismic reliability of the bridge and alters the structural response, highlighting the need for considering carefully the evolution of a structure in the definition of management strategies and interventions. • Deterioration should be considered in Seismic Risk assessment of existing bridges. • Numerical results have been compared with experimental data. • Corrosion modifies the failure modes. • Deterioration leads to reduction of seismic reliability. • Not considering deterioration may lead to underestimating seismic risk. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Italian existing bridges have been in many cases built during the second half of XX century and are close to or have already exceeded their intended design life. Important deterioration phenomena can be present, impacting the structural response and the seismic reliability of the system. Among the possible deterioration phenomena present in an existing bridge, corrosion plays a key role altering significantly the response of Reinforced Concrete (RC) members over time. This paper presents part of the research activities carried out by the authors within the project DPC-ReLUIS 2022-24 WP3 on seismic risk and reliability of existing bridges. A case study bridge is presented and analyzed in three sites representative of low, moderate and high seismic hazard. The case study is analyzed in both pristine and corroded condition. The corrosion scenario considered in the work has been validated through comparison with the results of an extensive experimental campaign. The results reveal that corrosion significantly reduces the seismic reliability of the bridge and alters the structural response, highlighting the need for considering carefully the evolution of a structure in the definition of management strategies and interventions. • Deterioration should be considered in Seismic Risk assessment of existing bridges. • Numerical results have been compared with experimental data. • Corrosion modifies the failure modes. • Deterioration leads to reduction of seismic reliability. • Not considering deterioration may lead to underestimating seismic risk. [ABSTRACT FROM AUTHOR]
ISSN:02677261
DOI:10.1016/j.soildyn.2025.109877