Simplified structural deterioration model for reinforced concrete bridge piers under cyclic loading 1

Rao, Anirudh; Lepech, Michael D.; Kiremidjian, Anne S.; Sun, Xiaohan

doi:10.1201/9781351204590-6

Cited by 8 publications

(10 citation statements)

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“…Ageing reinforced concrete (RC) bridges are susceptible to various environmental stressors including chlorideinduced corrosion and carbonation. Chloride-induced corrosion of reinforcing steel is a major environmental stressor affecting the performance of ageing RC bridges and structures in the UK, USA and other developed countries (Rao et al, 2016a;Chiu et al, 2015). Severe corrosion can result in catastrophic failure (Broomfield, 2007).…”

Section: Introductionmentioning

confidence: 99%

Residual Capacity of Corroded Reinforced Concrete Bridge Components: State-of-the-Art Review

Kashani

Maddocks

Dizaj³

2019

J. Bridge Eng.

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The current paper provides a comprehensive review of experimental studies on corrosion damaged reinforced concrete (RC) components, and the ability of current state-of-the-art numerical models to predict the residual capacity of these corroded RC components. The experimental studies on corroded RC components are classified into five different categories including: (i) beams in flexure, (ii) beams in shear, (iii) columns under pure axial compression, (iv) circular columns in flexure, and (v) rectangular columns in flexure. For each group, a summary of all the previous research are provided. Through the regression analyses, the experimental results of each abovementioned groups are used to examine the adverse effect of corrosion on ductility and, flexural, shear, and axial capacity loss of the corroded RC components. Finally, the observed results of the previous experimental studies are compared with the predicted values using the state-of-the-art numerical models currently available in the literature. The summarised experimental results show that corrosion has much more adverse impact on ductility of the RC columns than strength. However, the effect of corrosion on ductility and strength reduction of RC beams is the same. Moreover, results of cross-sectional moment-curvature analyses using the state-of-the-art corrosion damage models show a good correlation between the predicted residual flexural capacity and observed experimental results. Finally, the existing shortcomings in the literature and open issues to be addressed in the future research are discussed, and some recommendations are provided.

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Section: Introductionmentioning

confidence: 99%

Residual Capacity of Corroded Reinforced Concrete Bridge Components: State-of-the-Art Review

Kashani

Maddocks

Dizaj³

2019

J. Bridge Eng.

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“…A modelagem da deterioração por corrosão tem utilizado os processos fenomenológicos em que a corrosão do aço no concreto armado é segmentada e resumida em dois estágios, o de iniciação e o de propagação da corrosão (TUUTTI, 1982;BAKKER, 1988;RAO et al, 2017).…”

Section: Introductionunclassified

Análise Numérica Do Estado De Danificação De Estruturas De Concreto Armado Condicionadas À Corrosão Uniforme

Félix¹,

Carrazedo²

2020

≫Congresso Brasileiro De Patologia Das Construções

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A fim de controlar e minimizar os efeitos impostos pela corrosão, faz-se necessário deter ferramentas capazes de modelála e, assim, avaliar o estado de danificação do concreto de cobrimento ao longa da vida útil do elemento estrutural. Sabendo disso, este trabalho apresenta uma avaliação da evolução do dano em vigas de concreto armado quando submetidas a diferentes ambientes e, com concretos produzidos com distintos traços. A simulação da corrosão e de seus efeitos é feita por meio de um modelo que foi desenvolvido baseando-se no Método dos Elementos Finitos Posicional, e que considera as não-linearidades física e geométrica. Os resultados encontrados demonstram a eficiência da formulação desenvolvida e apontam a aplicabilidade da mesma para a modelagem e simulação dos efeitos deteriorativos da corrosão no concreto armado. Ademais, os resultados encontrados neste trabalho mostram que a depender da configuração da disposição das armaduras, do cobrimento, do traço do concreto e do ambiente de exposição, o nível de danificação de um elemento de concreto pode ser significativamente elevado, comprometendo a sua integridade estrutural e, por consequência, a sua vida útil. Palavras-chave: concreto armado, mecânica do dano, degradação do concreto, corrosão.

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“…Along with the experimental studies, several numerical models have also been developed to simulate the structural behaviour of corroded RC components [13][14][15]. The majority of these numerical models are based on the uniform cross sectional area reduction of reinforcing bars [13,14] without accounting for the effect of pitting on mechanical properties of reinforcing steel and corrosion-induced damage in concrete. Dizaj et al [16] developed a new modelling technique using nonlinear fibre beam-column element to simulate nonlinear behaviour of rectangular RC columns, and verified it against experimental test results.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic seismic vulnerability analysis of corroded reinforced concrete frames including spatial variability of pitting corrosion

Dizaj

Madandoust

Kashani

2018

Soil Dynamics and Earthquake Engineering

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A probabilistic framework for seismic vulnerability analysis of corroded Reinforced Concrete (RC) frame structures is developed. An advanced nonlinear finite element modelling technique is used to accurately simulate the nonlinear behaviour of prototype corroded RC frames over their service life. Different sources of uncertainties including modelling uncertainties, geometrical uncertainties and spatial variability of pitting corrosion are considered through Monte Carlo simulation and using Latin Hypercube Sampling (LHS) technique. A set of new seismic damage limit states (SDLS) are defined accounting for multiple failure modes of the corrosion damaged frames by means of pushover analyses. The influence of corrosion on nonlinear dynamic behaviour of corroded RC frames is investigated through Incremental Dynamic Analysis (IDA) of proposed frame structures under 44 far-field ground motions. The impact of considering corrosion damaged SDLS, spatial variability of pitting corrosion, and record-to-record variability on seismic vulnerability of RC frames are explored and discussed in detail. It is concluded that disregarding the influence of corrosion on SDLS significantly underestimates the probability of failure of corroded RC frames. The analyses results show that spatial variability of pitting corrosion does not have a significant impact on global nonlinear behaviour and seismic vulnerability/reliability of corroded RC frames.

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Simplified structural deterioration model for reinforced concrete bridge piers under cyclic loading 1

Cited by 8 publications

References 0 publications

Residual Capacity of Corroded Reinforced Concrete Bridge Components: State-of-the-Art Review

Residual Capacity of Corroded Reinforced Concrete Bridge Components: State-of-the-Art Review

Análise Numérica Do Estado De Danificação De Estruturas De Concreto Armado Condicionadas À Corrosão Uniforme

Probabilistic seismic vulnerability analysis of corroded reinforced concrete frames including spatial variability of pitting corrosion

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