Correlation of Surface Cracks of Concrete due to Corrosion and Bond Strength (between Steel Bar and Concrete)

Koulouris, Konstantinos; Apostolopoulos, Charis

doi:10.1155/2019/3438743

Cited by 41 publications

(38 citation statements)

References 41 publications

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“…Correlation between ultimate bond strength ratio and surface crack width. Comparison between recommendations from Model Code 2010[62], results from previous authors[48,58,51,59,52,53] (data derived from plots where not explicitly presented in published work) and results from present study It is reasonable to assume that a local relationship exists between equivalent bond stresses and the total crack width along the bar. The average bond stress ratios can therefore be compared with the mean total crack widths, as shown in the plots ofFig.…”

mentioning

confidence: 56%

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Corrosion-induced cracking and bond strength in reinforced concrete

Mak

Desnerck

Lees

2019

Construction and Building Materials

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Corrosion of the steel reinforcement is among the main causes of deterioration in concrete structures. Measures of corrosion levels are typically used to evaluate the subsequent reduction in steel-to-concrete bond, but results lack accuracy. In this study, a new assessment approach based on surface cracks was investigated. Specimens were subjected to accelerated corrosion using an impressed current. With a novel sealing method, mass losses were decoupled from concrete cracking. The results indicate that surface crack widths can be better indicators of bond degradation than corrosion levels. The findings can lead to more accurate assessments and reduced maintenance costs of infrastructure.

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mentioning

confidence: 56%

“…Reviews of the relevant literature can be found elsewhere [17,23]. [38,48,7,41,42,43,51,44,3,52,53]; (b) Bond deterioration and corrosion [5,47,39,54,48,49,55,18,50,51,56,16,52,53].…”

Section: Corrosion Products Steel Bar Concretementioning

confidence: 99%

Corrosion-induced cracking and bond strength in reinforced concrete

Mak

Desnerck

Lees

2019

Construction and Building Materials

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“…On this basis, many researchers have studied the effect of corrosion on bond between steel and concrete [24][25][26][27][28][29][30]. As Maslehuddin et al [27] reported, bond strength of RC specimens without transverse reinforcement increases slightly in low corrosion degree; however, sharp bond loss takes place with the propagation of corrosion.…”

Section: Corrosion Effect On Bond Strengthmentioning

confidence: 99%

“…Testing RC specimens without stirrups, Maslehuddin et al [27] indicated that although a slight improvement of bond strength is demonstrated in low corrosion levels, sharp degradation pf bond strength is recorded as corrosion increases. Recently, experimental studies by Zandi et al [28], Lin et al [29] and Apostolopoulos and Koulouris [30] investigated both the significant role of stirrups spacing and corrosion carrying out eccentric pull out tests on RC elements with usual design values of concrete cover.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Effect on Bond Loss between Steel and Concrete

Apostolopoulos¹,

Koulouris²

2021

Structural Integrity and Failure

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This chapter is devoted to the effects of steel corrosion on bond relationship between steel and concrete. One of the basic assumptions in design of reinforced concrete members is the perfect steel - concrete bond mechanism, so that strain of reinforcing bar is the same as that of the surrounding concrete and these two different materials act as one. However, corrosion of steel reinforcement consists one of the main durability problems in reinforced concrete members, downgrade the bond behavior and therefore their structural integrity. Corrosion degrades the reinforcement itself, reducing the initial cross-section of the steel bar and its mechanical properties. Furthermore, tensile stresses in surrounding concrete caused due to oxides on the corroded reinforcement, lead to the gradual development of tensile field to the surrounding concrete, with spalling of the cover concrete and loss of bond mechanism as a consequence. In this chapter, an overview of damage of reinforced concrete due to steel corrosion is given, focused on the bond mechanism; factors that play key role in the degree of bonding and, also, proposed models of bond strength loss in correlation with the surface concrete cracking due to corrosion are indicated. To conclude, the ongoing research in this area of interest is presented, based on recent scientific studies.

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“…Corrosion of steel bars in concrete reduces the diameter, strength, and elasticity modulus of steel bars, cracks, or even exfoliates concrete cover. It weakens the bond between steel bars and concrete [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Seismic Response Analysis of Pier considering Durability Damage Repair

Liang

Mao

et al. 2020

Advances in Civil Engineering

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At present, most of the research studies on the seismic performance of the durability degraded reinforced concrete structure only consider the influence of a single factor. This paper comprehensively considers the factors such as concrete carbonization, steel corrosion, and bond slip performance degradation caused by other durability factors and durability damage repair and studies the influence of the above factors on the seismic performance of bridge structures. Based on the finite element model considering the bond slip and the material parameters of time-varying durability damage, the seismic performance analysis model of the pier is established considering material durability damage repair in different service periods. Then, the effect of material durability damage repair on the seismic performance of the pier is examined. The results show that the displacement of the pier top increases, the curvature of the pier bottom decreases, and the moment-curvature curve pinching phenomenon is further evident when considering the bond slip. When considering the durability damage repair of materials, the curvature considerably decreases (the maximum value is approximately 16.04%) with the extension of the service time of the bridge, and the pier damage is substantially reduced.

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Correlation of Surface Cracks of Concrete due to Corrosion and Bond Strength (between Steel Bar and Concrete)

Cited by 41 publications

References 41 publications

Corrosion-induced cracking and bond strength in reinforced concrete

Corrosion-induced cracking and bond strength in reinforced concrete

Corrosion Effect on Bond Loss between Steel and Concrete

Seismic Response Analysis of Pier considering Durability Damage Repair

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