Structural capacity assessment of corroded RC bridge piers

Kashani, Mohammad M.; Crewe, Adam J; Alexander, Nicholas A.

doi:10.1680/jbren.15.00023

Cited by 22 publications

(19 citation statements)

References 26 publications

(29 reference statements)

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“…(2), the electric charge is determined by integrating the current over time. This method has been successfully used in other studies (Kashani et al 2017a;Kashani 2017).…”

Section: Accelerated Corrosion Procedures (Acp)mentioning

confidence: 98%

“…At the structural component level, some studies have been conducted on the structural performance of corroded RC components under static cyclic loading (Mangat and Elgarf 1999;Castel et al 2000a, b;Webster and Clark 2000;Lee et al 2003;El Maaddawy et al 2005; Kallias and Rafiq 2010;Ma et al 2012;Ou et al 2012;Meda et al 2014;Guo et al 2015a, b;Li et al 2015;Zhang et al 2015b;Vu et al 2016;Yang et al 2016;Liu et al 2017;Kashani et al 2017a;Zhang et al 2017;Dizaj et al 2018a, b;Li et al 2018;Rajput and Sharma 2018). They reported that corroded RC columns demonstrated a significant reduction in the ultimate load capacity and ductility.…”

Section: Introductionmentioning

confidence: 99%

“…Several researchers reported that the transverse reinforcement is more vulnerable to corrosion damage than the longitudinal reinforcement since they have less cover than the longitudinal reinforcement. This results in premature buckling of the longitudinal reinforcement and crushing of concrete core under lateral cyclic and/or axial loadings (Ma et al 2012;Meda et al 2014;Kashani et al 2017a).…”

Section: Introductionmentioning

confidence: 99%

“…2017; Kashani et al 2017a) have investigated the nonlinear static and dynamic responses of corroded RC bridges numerically. However, to date, there is no experimental data on the testing of corroded RC components under real dynamic earthquake loading.…”

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confidence: 99%

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Nonlinear dynamic behaviour of severely corroded reinforced concrete columns: shaking table study

Dietz

Alexander

et al. 2019

Bull Earthquake Eng

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A set of benchmark, medium scale, shaking table tests on corroded reinforced concrete (RC) columns is conducted with the aim of investigating the effects of corrosion damage on the nonlinear dynamic behaviour of RC bridge piers. The experimental programme consists of an uncorroded control specimen and two corroded RC column specimens, with identical structural details. An accelerated corrosion procedure is used to corrode the RC columns. The uncorroded and corroded specimens are subjected to far-field long duration ground motion excitations. The two corroded columns had 51% and 65% average mass loss ratios. The testing sequence includes slight, extensive, and complete damage levels, followed by an aftershock to examine the cascade effect on the nonlinear dynamic response of the proposed RC columns. The experimental results show that corrosion changes the failure mode of the RC columns, and has a significant negative impact on the residual strength (about 50% mass loss results in about 80% strength reduction) and drift capacity of RC columns.

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“…(2), the electric charge is determined by integrating the current over time. This method has been successfully used in other studies (Kashani et al 2017a;Kashani 2017).…”

Section: Accelerated Corrosion Procedures (Acp)mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Nonlinear dynamic behaviour of severely corroded reinforced concrete columns: shaking table study

Dietz

Alexander

et al. 2019

Bull Earthquake Eng

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“…On a different subject, Kashani, Crewe and Alexander (2017) develop a numerical method that simulates the behaviour of concrete columns with corroded reinforcement. To calibrate their model and verify the approach they relied on an extensive experimental programme (Kashani et al, 2013a(Kashani et al, , 2013b(Kashani et al, , 2013c(Kashani et al, , 2014(Kashani et al, , 2015a(Kashani et al, , 2015b(Kashani et al, , 2015c and also on testing a 2·5 m-high column specimen under cyclical loading after inducing corrosion in the reinforcement.…”

mentioning

confidence: 99%

Editorial

Sánchez¹

2017

Proceedings of the Institution of Civil Engineers - Bridge Engi

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Welcome to the second themed issue of Bridge Engineering on the subject of assessing the capacity of existing bridges. As a result of the number of papers received after our initial call on this subject, we have been able to publish two separate issues. This fact shows the importance and attention that this subject currently has in our industry. Another significant factor for this success is related to the variety and wide range of applications and cases to which capacity assessment of existing bridges can be extended.This second themed issue of Bridge Engineering includes seven very interesting papers that cover a wide range of phenomena and scale; spanning in time from the capacity loading assessment of a nineteenth century iron arch, the assessment of an iconic reinforced concrete box built in the 1940s, passing through post-tensioned decks completed in the 1970s, and finishing with the evaluation of the arching effect in twenty-first century segmental concrete bridges.Physical scale models are not very common as part of bridge assessment strategies, primarily due to their cost; however, in a very interesting paper, D.P. Cousins (2017) combines full-scale laboratory testing of concrete hinges with the more traditional approach of using analytical tools along with inspection to evaluate the accurate behaviour and fatigue assessment of this element as a main feature of a multi-span reinforced concrete deck. This type of hinge, also known as a Freyssinet hinge when working primarily in compression, was also used extensively in deck structures in the UK in the 1960s. Its conclusions, backed up by detailed modelling and an independent check on top of the full-scale experimental results, clearly shows the benefit of this effort when compared with the general approach of BA/09 (HA, 2009), which is understandably conservative.Zaid and Collings (2017) also take advantage of full-scale tests in segmental box girder strips, carried out by Choi and Oh (2013), to develop a sophisticated analysis to evaluate the different contributions of frame action, compressive membrane action and geometric arching action that govern the accurate transversal behaviour of the top slab of concrete boxes under traffic loading. Their approach shows the benefit not only in the assessment of existing concrete box decks under, for example, abnormal traffic loading but also the potential savings in materials that can be introduced in new design with the appropriate consideration of the phenomena.On a different subject, Kashani, Crewe and Alexander (2017) develop a numerical method that simulates the behaviour of concrete columns with corroded reinforcement. To calibrate their model and verify the approach they relied on an extensive experimental programme (Kashani et al., 2013a(Kashani et al., , 2013b(Kashani et al., , 2013c(Kashani et al., , 2014(Kashani et al., , 2015a(Kashani et al., , 2015b(Kashani et al., , 2015c and also on testing a 2·5 m-high column specimen under cyclical loading after inducing corrosion in the reinforcement. Their ana...

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Nonlinear finite element modeling of the impact of reinforcement corrosion on bridge piers under concentric loads

Zaghian

Martı́n-Pérez

Almansour

2022

Structural Concrete

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Corrosion of reinforcing steel in reinforced concrete (RC) infrastructure is one of the most detrimental deterioration mechanisms, affecting both safety and serviceability. In the present study, a comprehensive analysis methodology of corrosion damage is adopted. The detrimental effects of corrosion‐induced degradation of material properties on the ultimate capacity of an existing aging RC bridge pier under concentric loading are investigated. A three‐dimensional nonlinear finite element analysis using the commercially available finite element program DIANA is used. The main corrosion‐induced deteriorating factors considered in the present study are: concrete strength degradation within the cover and part of the confined concrete core due to corrosion‐induced cracking, degradation of confinement effects, steel area reduction due to uniform corrosion (in both longitudinal and tie reinforcement), steel ductility degradation due to pitting corrosion, buckling of compressive steel bars due to cross‐section reduction and confinement degradation, and bond strength degradation between steel and concrete induced by concrete cracking/spalling. The methodology is evaluated by comparing the numerical results to those of corroded column tests reported in the literature.

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Structural capacity assessment of corroded RC bridge piers

Abstract: General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above.

Cited by 22 publications

References 26 publications

Nonlinear dynamic behaviour of severely corroded reinforced concrete columns: shaking table study

Nonlinear dynamic behaviour of severely corroded reinforced concrete columns: shaking table study

Editorial

Nonlinear finite element modeling of the impact of reinforcement corrosion on bridge piers under concentric loads

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