Influences of corrosion degree and corrosion morphology on the ductility of steel reinforcement

Zhu, Wenjun; François, Raoul; Poon, Chi Sun; Dai, Jian‐Guo

doi:10.1016/j.conbuildmat.2017.05.079

Cited by 72 publications

(39 citation statements)

References 20 publications

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“…At material level, several researchers (Almusallam 2001;Du et al 2005a, b;Kashani et al 2013aKashani et al , b, 2014Zhu and François 2014;Fernandez et al 2015;Kashani et al 2015a, b;Zhang et al 2015a;Balestra et al 2016;Fernandez et al 2016;Ou et al 2016;Taha and Morsy 2016;Kashani 2017;Lim et al 2017;Zhu et al 2017) concluded that corrosion has a significant negative impact on the mechanical properties of reinforcing bars. Experimental material testing indicates that a significant decrease in both the yield and ultimate strengths of corroded rebars can be observed when the corrosion level is over 10% mass loss.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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

Dietz

Alexander

et al. 2019

Bull Earthquake Eng

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“…Based on the assumption that the remaining material of the steel bar are unaffected by steel corrosion [13,21,22], the shape of the corroded bar is formed by mechanical slotting, therefore the residual cross-sectional shape of the steel bar after corrosion is simulated. Mechanical slotting is carried out in the uncorroded steel bar shown in Figure 1, and detailed information of slotting is given in Figure 4.…”

Section: Simplified Model Of the Corroded Steelmentioning

confidence: 99%

“…When < , < can be obtained according to Equations (10) and (13). Thus, < can be derived and this state can be defined as "light corrosion".…”

Section: The Attenuation Law Of Ultimate Strengthmentioning

confidence: 99%

“…Thus, < can be derived and this state can be defined as "light corrosion". When > , > can be obtained according to Equations (10) and (13). The loss rate in this state is > , and this state can be defined as "severe corrosion".…”

Section: The Attenuation Law Of Ultimate Strengthmentioning

confidence: 99%

“…Simultaneously, its mechanical properties, such as the overall strength and ductility of a corroded steel bar, are heavily impacted by the increase of corrosion degree [8][9][10]. There are many studies on the constitutive characteristics of corroded steel bars, but most of them are based on experimental results to give empirical estimation on the effect of corrosion on the mechanical properties of corroded steel bars [11][12][13][14][15][16]. Owing to the complex and variable appearance of corroded steel bars [17][18][19][20], it is still not fully understood about how various parameters affect the constitutive relation of corroded steel bars.…”

Section: Introductionmentioning

confidence: 99%

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The Constitutive Relationship for Corroded Steel Bars: Model and Analysis

Xiong

Zeng

et al. 2019

Materials

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Combining the theoretical derivation and numerical calculations, the characteristic changes of the tensile constitutive relation of corroded steel bars and their underlying mechanisms are studied. Corroded steel bars are regarded as a combination of three parts, which include uncorroded part, corroded part with variable cross section, and uniform corroded part. It is assumed that in all three parts the steel material follows a simplified trilinear constitutive relation of a mild steel material (elasticity, yielding, and hardening), from which an analytical model describing the overall tensile constitutive relation of the corroded steel bar is developed. Based on the experimental data of slotted steel bars, the validation of the present analytical model is provided. The results show that the trilinear model can give relatively accurate prediction of the characteristic parameters of corroded steel bars. The influences of corrosion rate on the mechanical properties of corroded steel bars are examined using the proposed model.

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Multifunction of Biomimetic Liquid Infused Systems Derived from SLIPS Theory: A Review

Xia

Zhang

Guo

2023

Adv Materials Inter

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On this basis, two theoretical models appeared to the world. In 1936, Wenzel added a surface roughness factor "r" to Young's equations. [7] In 1944, Cassie and Baxter showed that the composite interface of solid and air can affect the superhydrophobicity. [8] Since then, the theory and analysis of surface has aroused enormous interest among scientists and researchers. In 1997, Barthlott and Neinhuis proposed the "lotus effect," [9] which is a hydrophobic and self-cleaning effect originated from the hierarchical structure of lotus leaves. A flurry of research on superhydrophobic surfaces came after that. Gradually, research on fabrication of surfaces with special wetting property became popular.The commonly used materials for daily applications contain textiles, glass, metal, and their alloys whose surfaces can be protected from being wetted, contaminated, or fouled by water and oil pollutants. Most metal materials will inevitably be oxidized when they encounter common liquid corrosion media, such as water, and the oxide film cannot effectively protect them. If the metal is covered with superhydrophobic surface, the air cushion contained in the micro-nano composite structure on the surface will protect the metal and separate the direct contact between the substrate and the liquid. It makes it difficult for corrosive ions to reach the metal surface, which significantly improves the corrosion resistance of the metal. However, the air cushion is unstable and easily replaced by liquid under external pressure and high temperature, losing its superhydrophobicity and corroded by liquid.At present, there are two main research directions of liquid repelling surfaces: Cassie-Baxter water contact state surfaces and lubricant-liquid contact state surfaces. The Cassie-Baxter contact surface designation was inspired by lotus leaves, butterfly wings and Inaba, mainly included superamphiphobic, superhydrophobic, and superoleophobic surfaces. These artificial surfaces can be combinate by low surface energy substance modification and micro-nano structures. Besides, with the inspiration of Nepenthes, lubricant-liquid contact state surfaces are designed. In 2011, Joanna Aizenberg of Harvard University and her colleagues first introduced "slippery liquid infused porous surface" (SLIPS)-that each consist of a film of lubricating liquid locked in place by a micro/nano porous substrate. [10] Compared with superhydrophobic surface, its air layer is replaced by immiscible liquid layer, which provides a more Slippery liquid infused porous surface (SLIPS) inspired by the microstructure of carnivorous Nepenthes has the potential to be used in a wide range of fields, including nautical, industrial, medical, etc. Due to their excellent optical transparency, self-healing after mechanical injury and controllable wetting properties, SLIPS has attracted extensive research interest. With appropriate lubricants, sufficient performance will be armed to the surface so as to adapt for further requirements. In this review, the first part focuses on the b...

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Influences of corrosion degree and corrosion morphology on the ductility of steel reinforcement

Cited by 72 publications

References 20 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

The Constitutive Relationship for Corroded Steel Bars: Model and Analysis

Multifunction of Biomimetic Liquid Infused Systems Derived from SLIPS Theory: A Review

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