Experiment investigation of the influence of reinforcing bar buckling on seismic behavior of RC columns

Yang, Hong; Sun, Panxu; Deng, Yunjun

doi:10.1016/j.engstruct.2020.110923

Cited by 17 publications

(5 citation statements)

References 41 publications

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“…These specimens were either with small to moderate tube diameters (d = 83 and 111 mm) or with moderate to tall tube heights (h = 375 and 500 mm). This failure might be due to the horizontal stress generated during the rebar buckling [28]. As the tube height increased, the embedded rebar was slenderer and more susceptible to buckle.…”

Section: Figure 11 Failure Modesmentioning

confidence: 99%

“…Comparing the specimens from groups 1 and 3, groups 4 and 6, and groups 7 and 9, as the height increased from 250 mm to 500mm, the axial stress capacity, fu were decreased by 5% to 42.36%. As the tube height increased, the buckling critical load decreased, and the specimen and the embedded rebar were more susceptible to buckling [3,28].…”

Section: Effect Of Tube Heightmentioning

confidence: 99%

“…Besides, as the rebar size increased, the slenderness ratio of the rebar decreased. This increased the buckling critical load and caused the rebar to be less susceptible to buckling [28].…”

Section: Effect Of Rebar Sizementioning

confidence: 99%

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Behaviour of Concrete-Filled Plastic Tube (CFPT) Embedded with Reinforcement Bar under Axial Compressive Load

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Section: Figure 11 Failure Modesmentioning

confidence: 99%

Section: Effect Of Tube Heightmentioning

confidence: 99%

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Behaviour of Concrete-Filled Plastic Tube (CFPT) Embedded with Reinforcement Bar under Axial Compressive Load

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“…The building was originally designed and constructed as a ve-storey structure without seismic protection (Nateghi 1995). A new design approach to the construction of the failure surface of a slender RC column subjected to biaxial bending was introduced (Yang 2020). Laboratory experiments are used to investigate the performance of square reinforced concrete columns externally con ned by steel angle collars under combined axial and lateral loads (Pudjisuryadi 2015).…”

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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“…While corrosion of steel degrades tensile capacity and service life of the structure, improper design and inadequate transverse reinforcement may lead to buckling of main rebars and shear failure (Liang et al, 2022;Mei et al, 2023;Yang et al, 2020). Figure 1 shows the damaged columns during the 2015 Sabah earthquake which struck Ranau, Sabah, Malaysia with a moment magnitude of 6.0 (Alih & Vafaei, 2019).…”

Section: Introductionmentioning

confidence: 99%

Seismic Resilience of CFRP Confined Rc Columns: Experimental Analysis

Abdul Halim,

Mustapa,

Ismail

2024

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Resilience and sustainability are the key goals of any building and infrastructure, especially in countries with moderate to high seismicity. However, in countries with low seismicity like Malaysia most existing buildings are designed to carry only the gravity load, which is vulnerable when subjected to additional loads such as earthquakes. Lateral ground motion can severely damage vital components like columns in the form of concrete crushing associated with the buckling of longitudinal reinforcement. This paper presented the application of fibre-reinforced polymer (FRP) as reinforcement in RC columns based on experiments for resilience and sustainability of RC structure. The application of FRP for retrofitting and strengthening structural elements not only increased the axial, shear and bending capacity, but also high durability towards harsh environment. CFRP in sheets/strips were flexible as compared to FRP bars; therefore, they can easily be shaped into spirals to confine the core concrete of column. This study showed that by using FRP sheets as internal confinement improved the seismic response of RC columns better than the conventional carbon steel material. A discussion on the performance of FRP sheets as internal confinement and their potential in improving the resilience and robustness of RC structures was presented for future directions.

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Experiment investigation of the influence of reinforcing bar buckling on seismic behavior of RC columns

Cited by 17 publications

References 41 publications

Behaviour of Concrete-Filled Plastic Tube (CFPT) Embedded with Reinforcement Bar under Axial Compressive Load

Behaviour of Concrete-Filled Plastic Tube (CFPT) Embedded with Reinforcement Bar under Axial Compressive Load

The Behaviours of Square Section Columns Under Earthquake Effect

Seismic Resilience of CFRP Confined Rc Columns: Experimental Analysis

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