Mechanical performance of steel reinforcing bars in uncorroded and corroded conditions

Caprili, Silvia; Salvatore, Walter

doi:10.1016/j.dib.2018.04.072

Cited by 10 publications

(7 citation statements)

References 6 publications

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“…This last assumption, together with the ultimate-toyielding ratio, are in accordance with different experimental tests investigating the robustness of RC sub-assemblies 15,16,[43][44][45]47,[52][53][54][55][56][57][58][59][60][61][62][63] as well as in line with the results of monotonic tensile tests conducted on a wide range of steel reinforcing specimens. 64 The elastic modulus is equal to 210 GPa. 2 The geometrical characteristics of the frame are included by modeling the points, lines, and macroelements (i.e., quadrilateral elements) as shown in Figure 5 for the first failure scenario.…”

Section: Definition Of Nlfe Model To Simulate the Failure Scenariosmentioning

confidence: 99%

Robustness improvements for 2D reinforced concrete moment resisting frames: Parametric study by means of NLFE analyses

Miceli,

Castaldo

2023

Structural Concrete

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This study develops a 2D computational parametric analysis of ordinary reinforced concrete (RC) frames, located in seismic zone, with the aim to evaluate some design suggestions with respect to their effectiveness in increasing the structural robustness. Specifically, a five‐storey and four‐span 2D RC moment resisting frame is considered, designed in a highly seismic area according to both Italian and European codes. Subsequently, respecting the seismic design code provisions through a cyclic design procedure, some modifications are suggested regarding the layout of the longitudinal reinforcement bars of the beams to exploit the continuity, Vierendeel behavior and influence of the side face reinforcement bars in the beams. For the different modifications, nonlinear finite element pushdown analyses of the whole frames are performed by imposing a monotonically increasing vertical displacement at the point of the column removal in Atena‐2D and considering the presence of the orthogonal framed systems. Furthermore, two different failure scenarios are examined. The numerical force‐displacement capacity curves corresponding to the different proposed design suggestions are investigated and compared. The results have demonstrated the effectiveness in improving the structural robustness of the proposed solutions, especially, of the side face reinforcement bars with respect to both flexural and catenary behavior. The outcomes have also highlighted the compatibility between design criteria of both robustness and earthquake engineering.

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Section: Definition Of Nlfe Model To Simulate the Failure Scenariosmentioning

confidence: 99%

Robustness improvements for 2D reinforced concrete moment resisting frames: Parametric study by means of NLFE analyses

Miceli,

Castaldo

2023

Structural Concrete

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“…Furthermore, corrosion impairs the mechanical response and useful service life of steel reinforcement. The experimental data of existing literature report the consequences of chloride induced corrosion, namely, the percentage mass loss and reduced cross-sectional area, the development of pits and stress concentration points and subsequent drop of mechanical properties of steel reinforcement [2][3][4][5][6][7][8]. Several studies demonstrate the cracking and spalling of concrete cover which leads to reduced bond strength between steel and concrete and reduced service life of structures [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Shot Blasting Process on Mechanical Properties and Anti-Corrosive Behavior of Steel Reinforcement

Basdeki

Apostolopoulos

2022

Metals

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The need to confront the problem of corrosion resistance of steel reinforcement is an issue of major importance and a perpetual challenge to the structural integrity and reliability in reinforced concrete (RC) structures. The current experimental study presents the results of the combined effect of shot blasting and coating on steel reinforcing bars in respect to their anticorrosive resistance and their mechanical behavior, at various times of exposure to corrosive environment. In the present manuscript, a comparison of different abrasive materials was primarily conducted, via electrochemical measurements (Tafel tests), to estimate the corrosion current (icorr) for each abrasive material. After the indication that corrosion resistance can be modified by shot blasting with corundum, the method of Zn85Al15 coating was chosen to further investigate the combined effect of shot blasting with coating, in terms of percentage mass loss and mechanical behavior of steel reinforcement. The results demonstrated that, upon the completion of the surface treatment process with corundum, the mechanical performance of steel bars was improved in terms of ductility. Moreover, the Zn85Al15 coating provided a satisfactory anticorrosive protection to steel bars in the entire exposure period of accelerated corrosion. The combined contribution of shot blasting and coating processes was deemed to be very encouraging and may trigger further investigation and research, for the production of a better corrosion resistance of B500c steel.

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“…4 Considering the detrimental effects associated to corrosion, one of its primary consequences is the reduction of the mechanical properties of reinforcements. In this context, several works have been carried out to investigate the stress-strain relationship of corroded steel rebars, [5][6][7][8][9][10][11][12][13][14][15][16] whereas limited studies have been performed for the prediction of the residual mechanical response of corroded prestressing strands. [17][18][19][20][21][22] In Table 1, the main features of each model are summarized.…”

Section: Introductionmentioning

confidence: 99%

A simplified stress–strain relationship for the mechanical behavior of corroded prestressing strands: The SCPS‐model

Franceschini

Belletti

Tondolo

2022

Structural Concrete

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This article presents a simplified stress-strain relationship for the definition of the mechanical behavior of prestressing strands subjected to chloride-induced corrosion, named SCPS-model (Simplified Model for Corroded Prestressing Strands).The constitutive law adopts the equivalent spring model, that reproduces the overall behavior of a corroded strand by summing the contributions of each wire, assumed as a spring working in parallel to the others. The SCPS-model is designed for the application in the daily engineering practice; to this aim, it is based on a single input parameter that is the maximum penetration depth of the most corroded wire. Following a detailed description of the model formulation and parameters, the article shows the validation of the stress-strain relationship through several comparisons with experimental tensile test outcomes coming from scientific literature. Finally, a statistical analysis of the dimensionless ratio of experimental and analytical results in terms of ultimate corroded strength and strain is carried out to demonstrate the effectiveness of the SCPS-model. Concluding, the accurate and safe side prediction of the residual mechanical behavior of corroded prestressing strands is proposed using the SCPS-model.

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Mechanical performance of steel reinforcing bars in uncorroded and corroded conditions

Cited by 10 publications

References 6 publications

Robustness improvements for 2D reinforced concrete moment resisting frames: Parametric study by means of NLFE analyses

Robustness improvements for 2D reinforced concrete moment resisting frames: Parametric study by means of NLFE analyses

The Effect of Shot Blasting Process on Mechanical Properties and Anti-Corrosive Behavior of Steel Reinforcement

A simplified stress–strain relationship for the mechanical behavior of corroded prestressing strands: The SCPS‐model

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