Dynamic simulation of CFRP‐shear strengthening on existing square RC members under unequal lateral impact loading

Al-Bukhaiti, Khalil; Liu, Yanhui; Zhao, Shichun; Abas, Hussein

doi:10.1002/suco.202100814

Cited by 10 publications

(4 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This paper is a part of a big project with different details of shapes and specimen dimensions. Nevertheless, the concrete and steel constitutive model definition, strain rate effects, and modeling methods are similar to the author's previous work 3 , 24 .…”

Section: Numerical Simulation Softwarementioning

confidence: 54%

See 1 more Smart Citation

Numerical study on existing RC circular section members under unequal impact collision

Liu

Al-Bukhaiti

Zhao

et al. 2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

Traffic accidents and derailed train-related incidents have occurred more often than ever in recent years, resulting in some economic damage and casualties. Reinforced concrete (RC) constructions often involve derailed train and vehicle accidents. Rarely are such side collisions studied in previous studies. To do this, high-fidelity simulation-based finite-element (FE) models are created in this paper to accurately simulate the collision of circular RC members with a derailed train. The reinforced concrete member structure is common in high-speed railway stations. The impact energy of the impact body is significant, causing structural member failure. It analyses the dynamic behavior of reinforced concrete members under unequal span impact loads. Numerical implementations of impact issues are discussed from the perspective of geometric, contact, and material properties. The reliability and precision of the ABAQUS code to solve impact issues are verified by comparing failure modes, impact, and deflection time history experimental outputs. By analysing the impact response characteristics, used the control variables to study the failure process and mode (including the characteristics of impact and reaction forces, deflection time history curve, impact force–deflection curve, and bearing reaction force–deflection curve). The reinforcement ratio, impact velocity, concrete strength, and slenderness ratio significantly affect shear crack pattern and development. Changes in impact velocity and slenderness ratio also affect member failure modes.

show abstract

Section: Numerical Simulation Softwarementioning

confidence: 54%

“…While the reinforced concrete members usually produce large deflection deformation at the impact point with unequal impact load position, and the flexural crack occurs with the steel rebar 1 – 3 , 24 , 25 .…”

Section: Introductionmentioning

confidence: 99%

Numerical study on existing RC circular section members under unequal impact collision

Liu

Al-Bukhaiti

Zhao

et al. 2022

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…The finite element model adopts a separate common node model. The author's previous work adopts the definitions of impact body, material properties, and supports [26,27]. When establishing a finite element model of an RC column, the size of the mesh density has a significant impact on the calculation accuracy of the model.…”

Section: Plos Onementioning

confidence: 99%

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

et al. 2023

View full text Add to dashboard Cite

This study investigated the impact of axial load on the dynamic response of reinforced concrete (RC) members to asymmetrical lateral impact loads. A series of asymmetrical-span impact tests were conducted on circular and square RC members with and without Carbon Fiber Reinforced Polymers (CFRP) while varying the axial compression ratios. The impact process was simulated using ABAQUS software, and the time history curves of deflection and impact were measured. The study found that specific impact loads caused bending and shearing failures. The axial compression ratio ranged from 0.05 to 0.13 when the impact curve reached its maximum deflection before the component’s impact resistance decreased. Analysis of the impact point and inclined crack location revealed that axial load affects the maximum local concrete. The speed of inclined crack penetration and inclined cracks take longer to form, with weaker resistance to damage to local concrete when the axial compression ratio is between 0.05 and 0.13. When the axial compression ratio is greater than 0.13, inclined cracks form sooner with more brittle and severe damage to the impact point’s concrete. The study also identified key parameters affecting the dynamic response of RC members, including impact height, CFRP layer thickness, axial force, and impact location. Thicker CFRP layers in RC can improve impact resistance, especially when the impact location is farther from the center. However, there is a limit to the impact of axial force on this resistance.

show abstract

“…To enhance the mechanical performance of aluminum alloy structural components, researchers have proposed various forms of composite structural components, such as aluminum alloy tube concrete composites, carbon fiber reinforced plastic (CFRP) reinforced aluminum alloy composites and CFRP-aluminum alloy composite tube concrete composites, and have conducted fundamental studies on their mechanical performance. Khalil et al [10][11][12][13] has proven that CFRP has good reinforcement effects and can significantly improve the impact resistance and stiffness of components. Regarding aluminum alloy tube concrete composites, Zhou and Young [14,15] conducted axial compression performance tests on aluminum alloy reinforced concrete columns and studied the effects of different cross-sectional areas (square, rectangular and circular) and dimensions on their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

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.

show abstract

Dynamic simulation of CFRP‐shear strengthening on existing square RC members under unequal lateral impact loading

Cited by 10 publications

References 59 publications

Numerical study on existing RC circular section members under unequal impact collision

Numerical study on existing RC circular section members under unequal impact collision

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

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

Contact Info

Product

Resources

About