Time-dependent multi-hazard seismic vulnerability and risk assessment of deteriorating reinforced concrete bridges considering climate change

Ge, Baixue; Yang, Yanzhi; Kim, Sunyong

doi:10.1016/j.istruc.2023.06.068

Cited by 5 publications

(1 citation statement)

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“…As described in [35][36][37][38], the RC viaducts present in the Italian motorway network are also characterized by a dynamic behavior which cannot be defined by one vibration mode. Therefore, the evaluation of their correct dynamic behavior still represents an important civil engineering issue, as in the case of long or multi span viaducts with cantilever or frame piers and elastomeric bearings.…”

Section: Introductionmentioning

confidence: 99%

Climate Change Impact on Corrosion of Reinforced Concrete Bridges and Their Seismic Performance

Zucca,

Landi,

Puppio

et al. 2023

Applied Sciences

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As a consequence of climate change impact, a significant variation in terms of temperature, atmospheric humidity, and carbon dioxide concentration levels is happening. This condition leads to several negative effects on the safety and the life cycle of existing concrete structures, such as the increase in the rate of material degradation, due to corrosion phenomena. In fact, the presence of carbonation and corrosion phenomena significantly influence the load-bearing capacity of existing reinforced concrete (RC) structures, under both static and dynamic loads. Among the wide range of existing RC constructions, bridges stand out for their importance. Furthermore, as structures directly exposed to the weather effects, they are more susceptible to these phenomena. In this paper, the influence of corrosion on existing RC motorway viaducts’ seismic behavior, considering the impact of climate change, is investigated, by means of an efficient procedure based on the implementation of 3D simplified finite element models and the use of analytical relations to obtain the amount of reduction in the steel reinforcement area as a function of the age of the bridge and of the different corrosion scenarios analyzed. Several scenarios for the expected variations in CO2 concentrations, temperature, and relative humidity are evaluated, considering that most of the viaducts present in the Italian motorway network were built between the 1960s and the 1970s. The results obtained using the projection of climate change impacts are compared with those calculated considering the corrosion scenarios resulting from the DuraCrete research project, to understand if the evolution of climate change leads to worse scenarios than those previously assessed.

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Section: Introductionmentioning

confidence: 99%