Reliability-Based Assessment of Damaged Prestressed Concrete I-Girder Bridges
Gianmarco Addonizio (Università degli Studi di Napoli Federico II)
Daniele Losanno (Università degli Studi di Napoli Federico II)
Eva O.L. Lantsoght (Universidad San Francisco de Quito, TU Delft - Civil Engineering & Geosciences)
Joan R. Casas (Universitat Politecnica de Catalunya)
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Abstract
Structural assessment of existing bridges becomes a challenging process in the presence of deterioration phenomena and outdated design action and resistance models. This paper explores the potentiality and effectiveness of reliability-based methods in the structural evaluation of existing PC I-girder bridges, highlighting scenarios where conventional methods, such as Partial Safety Factor Method, may underestimate structural capacity. Based on detailed visual inspection, in-situ data of deterioration phenomena is introduced in the probabilistic analysis and a Eurocodebased traffic model is adopted for the traffic load effect characterization. A case study is discussed emphasizing the advantages of adopting a reliability-focused assessment strategy and demonstrates that most of the investigated girders do not require intervention, even though considered inadequate, enhancing the efficiency and sustainability of infrastructure maintenance.