Seismic Behavior of Corroded RC Bridges: Review and Research Gaps

Andisheh, Kaveh; Scott, Allan; Palermo, Alessandro

doi:10.1155/2016/3075184

Cited by 39 publications

(13 citation statements)

References 130 publications

(132 reference statements)

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“…After depassivation, corrosion activity of the steel rebar readily increases. As the volume of corrosion products is greater than the sum of the reactant volumes, internal expansion of these products causes concrete cracking [3], subsequently increasing the chloride solution permeability of the concrete [4,5] and reducing the mechanical performance of the composite [6,7]. Premature replacement of damaged structures and associated mass consumption of additional construction materials are undesirable due in part to the high energy demands required for concrete production [8].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical polarization and impedance of reinforced concrete and hybrid fiber-reinforced concrete under cracked matrix conditions

Nguyen

Duncan

Devine

et al. 2018

Electrochimica Acta

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In this paper, we investigate the influence of cementitious matrix cracking on the electrochemical polarization and impedance behaviors of corroding reinforced concrete and crack-resistant reinforced hybrid fiber-reinforced concrete (HyFRC). Samples were exposed to a chloride environment for 2.5 years while in either a continuous tensile stress state or in a nonloaded condition, and were periodically monitored for Tafel polarization responses. Electrochemical impedance spectroscopy (EIS) was additionally performed at the conclusion of the test program. Greater severity of corrosion-induced matrix splitting cracks along the length of embedded steel reinforcing bars and subsequent formation of anodic surfaces were found to affect several electrochemical parameters, including increase of the corrosion current and decrease of the ohmic resistance of concrete. Cathodic and anodic Tafel coefficients and Stern-Geary coefficients for passive and active samples are also reported, highlighted by a Stern-Geary coefficient of B ¼ 28.1 mV for active corrosion.

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Section: Introductionmentioning

confidence: 99%

Electrochemical polarization and impedance of reinforced concrete and hybrid fiber-reinforced concrete under cracked matrix conditions

Nguyen

Duncan

Devine

et al. 2018

Electrochimica Acta

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“…Substantial research efforts have been performed on the mechanisms and modelling of the deterioration of structural elements and earthworks. The degradation of structural strength may be attributed to multiple factors, such as corrosion, erosion, other forms of chemical deterioration and fatigue (Melchers and Frangopol, 2008;Andisheh et al 2016). In particular, the corrosion of steel due to the ingress of chlorides is crucial, and more recent research efforts have focused on the effect of corrosion of reinforcing bars and steel bearings on the seismic fragility (Ghosh and Padgett 2011;Alipour et al 2011) or reliability (Frangopol et al 1997) assessment of bridges.…”

Section: Deterioration Effectsmentioning

confidence: 99%

Fragility of transport assets exposed to multiple hazards: State-of-the-art review toward infrastructural resilience

Argyroudis

Mitoulis

Winter

et al. 2019

Reliability Engineering & System Safety

196

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Vulnerability is a fundamental component of risk and its understanding is important for characterising the reliability of infrastructure assets and systems and for mitigating risks. The vulnerability analysis of infrastructure exposed to natural hazards has become a key area of research due to the critical role that infrastructure plays for society and this topic has been the subject of significant advances from new data and insights following recent disasters. Transport systems, in particular, are highly vulnerable to natural hazards, and the physical damage of transport assets may cause significant disruption and socioeconomic impact. More importantly, infrastructure assets comprise Systems of Assets (SoA), i.e. a combination of interdependent assets exposed not to one, but to multiple hazards, depending on the environment within which these reside. Thus, it is of paramount importance for their reliability and safety to enable fragility analysis of SoA subjected to a sequence of hazards. In this context, and after understanding the absence of a relevant study, the aim of this paper is to review the recent advances on fragility assessment of critical transport infrastructure subject to diverse geotechnical and climatic hazards. The effects of these hazards on the main transport assets are summarised and common damage modes are described. Frequently in practice, individual fragility functions for each transport asset are employed as part of a quantitative risk analysis (QRA) of the infrastructure. A comprehensive review of the available fragility functions is provided for different hazards. Engineering advances in the development of numerical fragility functions for individual assets are discussed including soilstructure interaction, deterioration, and multiple hazard effects. The concept of SoA in diverse ecosystems is introduced, where infrastructure is classified based on (i) the road capacity and speed limits and (ii) the geomorphological and topographical conditions. A methodological framework for the development of numerical fragility functions of SoA under multiple hazards is proposed and demonstrated. The paper concludes by detailing the opportunities for future developments in the fragility analysis of transport SoA under multiple hazards, which is of paramount importance in decision-making processes around adaptation, mitigation, and recovery planning in respect of geotechnical and climatic hazards.

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“…Hence, the presented aspects motivate a specific analysis of the seismic effects on the 1960's coastal buildings in this area. The problematic related to structural degradation, because of corrosion, in constructions located in seismic prone areas is currently being studied [4], and usually requires from complex models. The effect of steel corrosion in RC structural elements is one of the fundamental durability problems in concrete constructions, and has been widely studied [5].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Seismic behavior of 1960's RC buildings exposed to marine environment

Bru

González

Baeza

et al. 2018

Engineering Failure Analysis

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Steel rebars corrosion is one of the most important problems of reinforced concrete (RC) structures. The mechanical performance loss of RC elements because of steel corrosion can be aggravated under horizontal loads (e.g. wind pressure or seismic actions). This paper presents a methodology for the study of the seismic behavior of a residential typology of the Mediterranean coast, which was widely spread during the 1960's. These RC frame structures are usually 10 to 15 stories high, located very close to the coast and are exempt buildings, which made them specially exposed to chloride corrosion. Besides, there are some design conditions that should be taken into account: (i) these structures were designed only under gravity loads, especially seismic actions were not considered. (ii) The raw materials had lower quality than those considered in current design codes, e.g. structural concrete strength was around 15 MPa, and made with natural beach sand as fine aggregates (hence including chlorides into the concrete mass). Therefore, two important aspects converge in these buildings, fifty years of marine exposure (i.e. degradation by corrosion) and the omission of the seismic loads in the original design, making them especially vulnerable to earthquakes (in an area with a moderate-high seismicity). Hence, a methodology for the seismic analysis of the corroded structure is proposed, in order to determine the structural safety factor of this type of structures, and evaluate the effectiveness of a retrofitting if necessary.

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Seismic Behavior of Corroded RC Bridges: Review and Research Gaps

Cited by 39 publications

References 130 publications

Electrochemical polarization and impedance of reinforced concrete and hybrid fiber-reinforced concrete under cracked matrix conditions

Electrochemical polarization and impedance of reinforced concrete and hybrid fiber-reinforced concrete under cracked matrix conditions

Fragility of transport assets exposed to multiple hazards: State-of-the-art review toward infrastructural resilience

Seismic behavior of 1960's RC buildings exposed to marine environment

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