Effect of the axial load on the dynamic response of the wrapped CFRP reinforced concrete column under the asymmetrical lateral impact load

Al-Bukhaiti, Khalil; Liu, Yanhui; Zhao, Shichun; Abas, Hussein; Daguang, Han; Xu, Nan; Yang, Lei; Yu, Yan Xing

doi:10.1371/journal.pone.0284238

Cited by 4 publications

(1 citation statement)

References 36 publications

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“…When the impact velocity is constant, increasing the axial compression ratio from 0 to 0.24 improves the impact resistance of the column but increasing it to 0.64 adversely affects it. The study conducted by Khalil AL-Bukhaiti [9] investigated the effect of axial loading on the dynamic response of reinforced concrete (RC) members under asymmetric lateral impact. Compression ratios between 0.05 and 0.13 resulted in a decrease in impact resistance, leading to increased deflection.…”

Section: Introductionmentioning

confidence: 99%

Study on Impact Resistance of All-Lightweight Concrete Columns Based on Steel Fiber Reinforced and Various Axial Compression Ratio

Wang

Gao

et al. 2023

Buildings

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Concrete columns in service are exposed to threats such as accidental impacts and explosions, which pose potential risks to the safety of buildings. Although fully lightweight concrete elements prepared from non-sintered fly ash ceramic pellets and pottery sand are widely used in engineering practice, the dynamic response of such elements under impact loading is not supported by adequate research data. Therefore, in this study, the dynamic response of all-lightweight concrete columns under impact loading with different axial compression ratios (0.1, 0.2, and 0.3) was investigated by means of drop hammer impact tests, and the potential of shear wave steel fibers in mitigating structural damage and preventing structural failure was investigated. The results of the study reveal that the specimens primarily exhibit shear and bending damage under impact loading. With an axial compression ratio of 0.1, the specimen is dominated by bending damage. As the axial compression ratio increases from 0.1 to 0.3, the specimen’s damage mode transitions to shear damage dominance. This change results in a larger impact force and displacement response while experiencing lower displacement acceleration. Additionally, the introduction of steel fibers improves the strength and stiffness of the specimens, shifting their behavior from shear to bending damage. Consequently, this reduces impact damage, mid-span displacement, and displacement acceleration while enhancing the specimen’s response to the impact force and its capacity for deformation energy dissipation.

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Section: Introductionmentioning

confidence: 99%

Study on Impact Resistance of All-Lightweight Concrete Columns Based on Steel Fiber Reinforced and Various Axial Compression Ratio

Wang

Gao

et al. 2023

Buildings

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Investigating the effectiveness of CFRP strengthening in improving the impact performance of RC members

Al-Bukhaiti,

Yanhui,

Shichun

et al. 2024

Structures

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Experimental study and numerical analysis on axial compression of round-ended concrete filled CFRP-aluminum tube columns

Wang,

Tang,

Qiu

et al. 2023

PLoS ONE

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To enhance the concrete confinement ability of circular-ended aluminum alloy tubes, carbon fiber reinforced polymer (CFRP) was bonded onto the tube surface to form CFRP confined concrete columns with circular ends (RCFCAT). Eight specimens were designed with number of CFRP layers and section aspect ratio as variables. Axial loading test and finite element analysis were carried out. Results showed CFRP delayed buckling of the aluminum alloy tube flat surfaces, transforming inclined shear buckling failure into CFRP fracture failure. Specimens with aspect ratio above 4 experienced instability failures. Under same cross-section, CFRP increased axial compression bearing capacity and ductility by up to 30.8% and 43.4% respectively. As aspect ratio increased, enhancement coefficients of bearing capacity and ductility gradually decreased, the aspect ratio is restrictive when it is less than 2.5. CFRP strengthening increased initial axial compression stiffness of specimens by up to 117.9%. The stiffness decreased gradually with increasing aspect ratio, with most significant increase at aspect ratio of 4. Strain analysis showed CFRP bonding remarkably reduced circumferential and longitudinal strains. Confinement effect was optimal at aspect ratio around 2.0. The rationality of the refined FE model established has been verified in terms of load displacement curves, capturing circular aluminum tube oblique shear buckling, concrete "V" shaped crushing, and CFRP tearing during specimen failure. The parameter analysis showed that increasing the number of CFRP layers is one of the most effective methods for improving the ultimate bearing capacity of RCFCAT.

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Effect of the axial load on the dynamic response of the wrapped CFRP reinforced concrete column under the asymmetrical lateral impact load

Cited by 4 publications

References 36 publications

Study on Impact Resistance of All-Lightweight Concrete Columns Based on Steel Fiber Reinforced and Various Axial Compression Ratio

Study on Impact Resistance of All-Lightweight Concrete Columns Based on Steel Fiber Reinforced and Various Axial Compression Ratio

Investigating the effectiveness of CFRP strengthening in improving the impact performance of RC members

Experimental study and numerical analysis on axial compression of round-ended concrete filled CFRP-aluminum tube columns

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