Study of the confinement performance and stress-strain response of RC columns with corroded stirrups

Zhang, Qin; Zheng, Nai-Hao; Gu, Xiaoqiang; Wei, Zong-Yan; Zhang, Zheng

doi:10.1016/j.engstruct.2022.114476

Cited by 41 publications

(5 citation statements)

References 29 publications

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“…Experiments were carried out on the response of rectangular RC columns with varying cross-sectional widths subjected to contact explosion effects (Dua 2019). The con nement performance and stress-strain response of RC with corroded reinforcement were studied (Zhang 2022). An experimental investigation was carried out to examine the enhancement of seismic performances of RC columns, such as shear strength and ductility, by controlling the bond of longitudinal reinforcements (Pandey 2008).…”

Section: Introductionmentioning

confidence: 99%

The Behaviours of Square Section Columns Under Earthquake Effect

Kap

2024

Preprint

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92% of Turkey is in the earthquake zone, and 95% of the population lives under earthquake risk. Laws and regulations determine the design and implementation of earthquake-resistant structures. The first earthquake regulation in Turkey was published in 1940. After 1940, a new earthquake regulation was published in 1944, 1949, 1953, 1962, 1968, 1975, 1998, 2007, and finally, in 2018. One of the most important problems seen in reinforced concrete buildings exposed to earthquake effects is the displacement of the floors. The drifts in the buildings vary depending on the stiffness, height, and elasticity modules of the load-bearing elements. In this study, a five-storey reinforced concrete building model was designed using five different column sections according to the 2018 earthquake code. C-30 concrete and S-420 steel were used in the designed building models, and the behaviours of these structures under the influence of earthquakes were analysed. In the analysis, the results of the building model with 35x35 cm columns were taken as a reference. It has been observed that the buildings designed with 40x40, 45x45, 50x50, and 55x55 section columns can carry more earthquake loads at the rates of approximately 104, 113, 128, and 141 tons respectively. At the same time, the displacements on the floors decrease by approximately 31, 47, 55, and 61%, respectively. However, changes in other building models were compared and tested with multiple comparison tests at a 95% confidence interval, and the test results were given in tables.

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Section: Introductionmentioning

confidence: 99%

The Behaviours of Square Section Columns Under Earthquake Effect

Kap

2024

Preprint

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“…And how does the compressive stress within concrete affect the expansion behavior of corrosion products? In view of the first problem, the research (Wu et al, 2019; Zhang et al, 2022) in the field of concrete structure can bring us some enlightenment. Wu et al (2019) found that with the increase of compressive stress, the corrosion damage of longitudinal reinforcement increased, while the corrosion damage of stirrup decreased.…”

Section: Introductionmentioning

confidence: 99%

An integrated material-structural analysis of prestress concrete affected by corrosion of non-prestressed reinforcement

Sun,

Gong,

Zhao

et al. 2024

Advances in Structural Engineering

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Corrosion-induced concrete cracking is a significant stage of structural deterioration in prestressed concrete (PC) structures. Most current research predominantly focuses on the corrosion of prestressed steel strands, while paying limited attention to the study of non-prestressed reinforcement corrosion. In this study, an integrated material-structural numerical approach was developed to simulate corroded PC beams, considering corrosion products migration in pores and cracks. The cracking patterns and prestress losses obtained from the simulation results agreed well with experimental observations. Subsequently, using the proposed numerical approach, the interaction mechanism of the prestress level and reinforcement corrosion was investigated. The simulation results indicated that corrosion of longitudinal reinforcement leads to cross-sectional damage, causing the redistribution of stress across the section and increasing long-term deformation, ultimately resulting in prestress losses. Meanwhile, stirrup corrosion leads to an initial increase in prestress due to expansion forces when the degree of corrosion is not so high, but finally it will also lead to a degradation of mechanical performance.

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“…Therefore, it is noteworthy investigating the seismic performance and damage properties for flexureshear critical columns. Certainly, many researchers have focused on the study of seismic performances and damage properties of flexure-shear failure columns subjected to the standard cyclic loading procedure (i.e., each loading displacement amplitude for 3-5 times cycles), and most of these studies attach importance to the effects of own design parameters such as shear span ratios, reinforcement ratios and sectional dimension on the performance degradation of RC columns (Eric and Halil 2008;Zhang et al 2013;Mohamed et al 2022;Zhang and Wei et al 2022;Zhang and Zheng et al 2022), whereas ignore the effects triggered by the complex cyclic loading procedure. Actually, the real seismic excitation is a kind of complex random perturbations (Ottavia et al 2021), so the actual earthquake response of the RC columns cannot be fully reflected by the traditional standard-cyclic loading procedure.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance and damage properties of flexure-shear critical RC columns with various loading cycles

Zhang

Chen

et al. 2023

Preprint

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An experimental study was conducted to investigate the effects of loading cycles on seismic behavior and damage properties for flexure-shear critical reinforced concrete columns. Two groups of circular columns (including 8 specimens) with different shear span ratios were tested under quasi-static loads with various cycles, and the numbers of load cycle were designed as 0 (i.e., monotonic loading), 3, 10, and 20 cycles, respectively. The failure modes, load-deformation curves, ductility and energy dissipation capacity of the flexure-shear critical columns with various loading cycles were explored. Test results revealed that the shear effects and cumulative damage effects induced by cyclic loading are intensified with the increase of the loading cycles, which demonstrated that the columns are prone to occur the flexure-shear failure with the increase of the cycles. The study examined that the ultimate deformation is the most crucial factor affecting the damage properties of flexure-shear critical columns. The ultimate displacement diminishes with the loading cycles increase, and it reduces by 38%, 50%, and 62%, respectively, when the loading cycles increase from 0 to 3, 10, and 20 cycles. Additionally, the damage properties of flexure-shear critical columns are also pertinent to cumulative energy dissipation. The cumulative energy dissipation of column specimens increases obviously after yielding and increases with the loading cycles increase. An new two-parameter seismic damage model considering ultimate deformation and energy dissipation that including the effects of loading cycles was proposed, and the model could optimally analyze the damage properties of flexure-shear critical columns subjected to seismic excitation.

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Study of the confinement performance and stress-strain response of RC columns with corroded stirrups

Cited by 41 publications

References 29 publications

The Behaviours of Square Section Columns Under Earthquake Effect

The Behaviours of Square Section Columns Under Earthquake Effect

An integrated material-structural analysis of prestress concrete affected by corrosion of non-prestressed reinforcement

Seismic performance and damage properties of flexure-shear critical RC columns with various loading cycles

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