Corroded reinforced concrete columns under simulated seismic loading

Rajput, Aditya Singh; Sharma, Umesh Kumar

doi:10.1016/j.engstruct.2018.05.097

Cited by 75 publications

(25 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

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

Dietz

Alexander

et al. 2019

Bull Earthquake Eng

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

Dietz

Alexander

et al. 2019

Bull Earthquake Eng

View full text Add to dashboard Cite

show abstract

“…11,12 In all these studies, it has generally been agreed that increasing level of corrosion affects the structural performance of columns adversely. 13 Aquino et al 14 16 reported flexural strength reduction in under-confined corroded RC circular columns of 18.16 and 10.82% at 9.3 and 14.7% corrosion degrees, respectively, while a reduction in stiffness and displacement ductility factor was also noticed. Similarly, Guo et al 17 reported a reduction of 14, 21.53, and 25% at corrosion degree of 8.14, 14.77, and 22.72%, respectively.…”

Section: Introductionmentioning

confidence: 96%

“…These limited studies have considered corrosion of either only confining reinforcement or of only main longitudinal reinforcement, and there is hardly any study where corrosion of the entire steel cage was considered . In all these studies, it has generally been agreed that increasing level of corrosion affects the structural performance of columns adversely . Aquino et al reported 20% reduction in the flexural strength at 4% corrosion degree, and Li et al reported only 13.68, 8.94, and 12.10% reduction at corrosion degrees of 19.7, 16.8, and 11.49%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Performance of aged reinforced concrete columns under simulated seismic loading

Rajput

Sharma

2019

Structural Concrete

View full text Add to dashboard Cite

Experimental investigations were carried out to examine the seismic performance of corroded reinforced concrete (RC) columns with sparsely distributed ties (under‐confined columns). Four full‐scale specimens were cast, corroded, and tested in this study. One specimen followed current seismic guidelines and acted as control column, while other three columns with larger tie spacing represented precode era under‐confined columns. Two of the three under‐confined columns were corroded to 15 and 30% corrosion degrees using a precalibrated accelerated corrosion regime. The entire study was intended to quantify the effect of inadequate confinement and corrosion on seismic response of RC columns. The results showed that the sparsely distributed transverse reinforcement resulted in lowering lateral strength and deformability of RC Columns. When these under‐confined columns were deteriorated by corrosion, their structural performance was found to have degraded significantly. It was observed that the specimens with 15 and 30% corrosion had 23 and 37.1% lower lateral load capacity respectively with respect to their un‐corroded counterpart. Furthermore, the observed lower values of ductility factors and other essential performance indicators manifested the adverse effects of inadequate confining reinforcement and aging‐related corrosion.

show abstract

“…It is found that the confinement of concrete provided by corroded stirrups was reduced, which causes an obvious decline in seismic behavior. Aditya et al [27] performed quasi-static tests on six real-size corroded columns to examine the effects of corrosion for seismic performance of RC columns. Results of the investigation show that corrosion of reinforcement may defeat the very purpose of providing transverse confinement in hinge regions of RC columns.…”

Section: Introductionmentioning

confidence: 99%

“…Effectiveness of fiber-reinforced polymer in reducing corrosion was also investigated [35], especially in marine environment [36] and seismic design of structures [37,38]. It is worth mentioning that although many scholars have done numerous investigations on the seismic performance of corroded RC columns, the research field is mainly focused on experimental researches on only longitudinal reinforcement corrosion [5,27,39] or only stirrups corrosion [7,20,26], theoretical analysis [29], evaluation and strengthening measures of seismic behavior for corroded RC columns [33]. However, there are few experimental studies on the effects of stirrup corrosion and longitudinal bars corrosion on the seismic performance degradation of columns, respectively, especially for the severely corrosion stirrups exceed of 20%, and the influence of corrosion degree on the failure mode of columns still needs to be further explored.…”

Section: Introductionmentioning

confidence: 99%

Seismic behavior of corroded reinforced concrete column joints under low-cyclic repeated loading

Luo

Cheng

Xiang

et al. 2020

Archiv.Civ.Mech.Eng

View full text Add to dashboard Cite

To investigate the influence of corroded steel bars on seismic performance of reinforced concrete (RC) columns, eight fullscale RC columns were designed and fabricated, which were composed of one uncorroded RC column, three RC columns with longitudinal reinforcement corrosion and four stirrup-corroded RC columns. The electrochemical test was conducted to accelerate the corrosion of steel bars in RC columns, and the low-cyclic repeated loading tests on RC columns with corrosion-damaged steel bars were carried out. The seismic behavior indicators, including the hysteretic curves, skeleton curves, displacement ductility coefficient, stiffness degradation curves and energy dissipation capacity of corroded RC columns and uncorroded columns, were compared and discussed. The experimental results show that with the increase in steel bars corrosion degree, the pinch phenomenon of the hysteretic curve gradually increases, and the energy dissipation capacity, stiffness and plastic deformation capacity of specimen reduce significantly. The ductility and energy dissipation coefficient decreased by 20% and 36%, respectively, when the stirrups corrosion ratio of specimen reaches 15.2%, and a shear failure surface was formed in the plastic hinge zone at the foot of the columns, which leads to the change of failure mode from ductile bending failure to shear failure with poor ductility under the ultimate load for corroded columns. The influence of stirrup corrosion on the failure mode of specimens is remarkable, but the effect of longitudinal reinforcement corrosion is negligible for specimens with the corrosion ratio within 14.7%. The adverse effects caused by over 15.2% stirrup corrosion should be considered in seismic design of structures in seismic zone.

show abstract

Corroded reinforced concrete columns under simulated seismic loading

Cited by 75 publications

References 18 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

Performance of aged reinforced concrete columns under simulated seismic loading

Seismic behavior of corroded reinforced concrete column joints under low-cyclic repeated loading

Contact Info

Product

Resources

About