Cyclic Behavior of Corroded Reinforced Concrete Bridge Piers

Yuan, Zhijie; Fang, Congqi; Parsaeimaram, Mohammad; Shao‐Horn, Yang

doi:10.1061/(asce)be.1943-5592.0001043

Cited by 55 publications

(15 citation statements)

References 25 publications

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“…e phenomenon is consistent with the findings from some experiments [26,27]. However, an increase in the ultimate curvature of cross section after corrosion can be observed in some previous studies [28,29].…”

Section: Seismic Capacity Of Pierssupporting

confidence: 93%

Life‐Cycle Seismic Fragility Assessment of Existing RC Bridges Subject to Chloride‐Induced Corrosion in Marine Environment

Wang

Guo

et al. 2021

Advances in Civil Engineering

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Bridges in a marine environment have been suffering from the chloride attack for a long period of time. Due to the fact that different sections of piers may be exposed to different conditionals, the chloride-induced corrosion not only affects the scale of the deterioration process but also significantly modifies over time the damage propagation mechanisms and the seismic damage distribution. In order to investigate the seismic damage of existing RC bridges subject to spatial chloride-induced corrosion in a marine environment, Duracrete model is applied to determine the corrosion initiation time of reinforcing steels under different exposure conditionals and the degradation models of reinforcing steels, confined concrete, and unconfined concrete are obtained based on the previous investigation. According to the seismic fragility assessment method, the damage assessment approach for the existing RC bridges subject to spatial chloride-induced corrosion in a marine environment is present. Moreover, a case study of a bridge under two kinds of water regions investigated the influence of spatial chloride-induced corrosion on the seismic damage of piers and other components. The results show that the spatial chloride-induced corrosion may result in the section at the low water level becoming more vulnerable than the adjacent sections and the alteration of seismic damage distribution of piers. The corrosion of pier will increase the seismic damage probability of itself, whereas it will result in a reduction of seismic damage probability of other components. Moreover, the alteration of seismic damage distribution of piers will amplify the effect. Due to the fact that the spatial chloride-induced corrosion of piers may alter the yield sequence of cross section, it then affects the seismic performance assessment of piers. A method to determine the evolution probability of yield sequence of corroded piers is proposed at last. From the result, the evolution probability of yield sequence of piers in longitudinal direction depends on the relationship between the height of piers and submerged zone. Moreover, the height of piers, submerged zone, and tidal zone have a common influence on the evolution of yield sequence of piers in transversal direction.

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Section: Seismic Capacity Of Pierssupporting

confidence: 93%

Life‐Cycle Seismic Fragility Assessment of Existing RC Bridges Subject to Chloride‐Induced Corrosion in Marine Environment

Wang

Guo

et al. 2021

Advances in Civil Engineering

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“…As shown in Table , the proportion of slip deformation is affected significantly by the corrosion level and structural parameters. For the specimens tested by Fang et al, the main difference is the corrosion level, and the proportion of slip deformation increases when the corrosion level becomes higher. Similar result can also be observed by comparing specimens C4–25 and C9–25 (or C11–75 and C13–75, C12–90 and C15–90).…”

Section: Feasibility Validation With Experimental Testsmentioning

confidence: 95%

“…Two groups of quasistatic tests are selected to verify the predicted results: One group was analyzed by Gong et al at Dalian University of Technology (DUT) in China, and the other group was analyzed by Fang et al…”

Section: Feasibility Validation With Experimental Testsmentioning

confidence: 99%

“…The transverse reinforcement consisted of 8‐mm stirrups at a spacing of 100 mm. For the tests completed by Fang et al, the column height was 1,100 mm, and the column section was circular with a diameter of 300 mm. The concrete cover depth and layouts of the longitudinal and transverse reinforcements were the same as those for the specimens tested at DUT.…”

Section: Feasibility Validation With Experimental Testsmentioning

confidence: 99%

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Prediction for lateral deformation capacity of corroded reinforced concrete columns

Cheng

Wang

2018

Structural Design Tall Build

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The deformation capacities of columns, which are the main lateral force-resisting elements of reinforced concrete (RC) structures, have been the subject of great interest with the development of performance/displacement-based seismic design. However, deterioration due to chloride-induced corrosion causes a significant reduction in the seismic performance of RC columns. Although numerous investigations have focused on the deformation capacity of columns with corroded rebars and various strengthening measures have been proposed, little attention was paid to evaluating the contribution of each deformation component to the tip displacement under corrosion (i.e., bending, shear, and longitudinal bar slip at the column footing), which plays an important role in investigating and explaining the failure mechanisms of columns. This paper presents a computational prediction model to estimate the deformation capacity of RC columns with corroded rebars, and the contributions of bending and bar slip at the column footing are mainly considered in this model due to the negligible contribution of the shear deformation component for columns subjected to flexural failure mode. The calculation results obtained by the prediction model are comparedwith the quasistatic test results of both noncorroded and corroded RC columns. It turns out that the prediction model simulates the deformation capacity of RC columns with corroded rebars reasonably well considering its simplicity and computational efficiency, and it can be used for time-variant capacity estimates for the lifetime seismic design and fragility assessment of RC columns exposed to corrosion.

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“…A suitable corrosion parameter should be determined to describe the corrosion level. In the previous studies, the mass loss rate, the average sectional loss rate, and the average corrosion penetration depth were often used to characterize the corrosion level of structural components [17][18][19][20]. These parameters represent the average corrosion degree of specimens.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Corroded High Performance Steel Specimens Based on 3d Scanning

2019

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An experimental study was performed to investigate the impact of corrosion on the mechanical properties of high performance steel (HPS) specimens. Fifteen HPS specimens were designed and subjected to electrochemically accelerated corrosion. The geometric features of the specimens were quantified by using 3D scanning technology. Then, tensile tests were employed to study the mechanical properties of the corroded HPS specimens. The relationship between the mechanical properties of the corroded HPS specimens and corrosion damage was discussed in detail. Meanwhile, a three-stage constitutive model was proposed to evaluate the mechanical behaviors of the degraded HPS specimens. Finally, a finite element model based on 3D scanning technology was developed and verified to investigate the stress distribution and failure of the tensile specimens. Results show that the maximum cross-sectional loss ratio is a suitable parameter for describing the mechanical properties of the degraded HPS specimens. The failure modes of the HPS specimens gradually vary from ductile to brittle as varies from 0% to 50.28%. It is found that the yield or ultimate load decreases linearly as the .increases. The corrosion-induced ductility reduction has an exponential relationship with. A comparison between the numerical results and experimental results shows that the proposed three-stage constitutive model is rational.

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Cyclic Behavior of Corroded Reinforced Concrete Bridge Piers

Cited by 55 publications

References 25 publications

Life‐Cycle Seismic Fragility Assessment of Existing RC Bridges Subject to Chloride‐Induced Corrosion in Marine Environment

Life‐Cycle Seismic Fragility Assessment of Existing RC Bridges Subject to Chloride‐Induced Corrosion in Marine Environment

Prediction for lateral deformation capacity of corroded reinforced concrete columns

Mechanical Properties of Corroded High Performance Steel Specimens Based on 3d Scanning

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