The effect of CFRP-shear strengthening on existing circular RC columns under impact loads

Liu, Yanhui; Dong, Angang; Zhao, Shichun; Zeng, Yue; Wang, Zhe

doi:10.1016/j.conbuildmat.2021.124185

Cited by 36 publications

(22 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, EB-FRP can increase the shear strength of columns and alter shear failure to flexural failure. Using a finite element model [47] revealed that an EB-FRP wrap could improve the shear strength of a damaged column under impact load and alter the failure mode from brittle shear to ductile flexural. Mo et al [48] revealed that using FRP sheets considerably increased the ductility and shear capacity of hollow rectangular bridge columns.…”

Section: Columnsmentioning

confidence: 99%

Enhancing Resilience and Self-Centering of Existing RC Coupled and Single Shear Walls Using EB-FRP: State-of-the-Art Review and Research Needs

Abbaszadeh

Chaallal

2022

J. Compos. Sci.

View full text Add to dashboard Cite

The primary seismic force-resisting system (SFRS) in middle- to high-rise reinforced concrete (RC) building structures often includes coupled shear walls (CSWs) and single shear walls (SSWs). These walls are designed to transfer lateral forces to the foundation and dissipate energy through the development of plastic hinges. The latter lead to residual displacement in these structural components. On the other hand, self-centering systems enable the structures to return to their initial position after severe loading or at least reduce residual displacement. The objectives of this study were, therefore, as follows: (i) to review the state of the art on shear wall self-centering techniques and retrofitting methods based on externally bonded fiber-reinforced polymer (EB-FRP); (ii) to evaluate research needs to improve the self-centering ability of shear walls using EB-FRP.

show abstract

Section: Columnsmentioning

confidence: 99%

Enhancing Resilience and Self-Centering of Existing RC Coupled and Single Shear Walls Using EB-FRP: State-of-the-Art Review and Research Needs

Abbaszadeh

Chaallal

2022

J. Compos. Sci.

View full text Add to dashboard Cite

show abstract

“…The strength, deformation, elasticity, and confining effect are influenced due to the changes in the cross-section, reinforcement, and the width-to-thickness ratio of the members under the lateral impact loads 1 – 4 . There has been some investigation into these factors in the previous literature.…”

Section: Introductionmentioning

confidence: 99%

“…FRP reinforcement may modify the failure mode of members in both experimental and finite element analysis. After being wrapped in FRP layers, the shear failure of RC members becomes a bending failure 4 . Abas et al studied the response of four RC square members to a lateral force.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, using the tested specimens and comparable specimens available in the literature 3 , 4 , the RC members' finite element (FE) models were developed and verified. The effects of the longitudinal reinforcement and stirrups ratio, impact velocity, concrete strength, and slenderness ratio on the dynamic response parameters of the RC members under unequal lateral impact loads were investigated further using the verified models.…”

Section: Introductionmentioning

confidence: 99%

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

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

“…Several experimental studies have been carried out on eccentrically loaded FRP confined circular columns [11,[13][14][15][16][17][18][19][20][21][22][23] and noncircular columns [9,[24][25][26][27][28][29][30][31][32], reveals that the confinement effectiveness of circular RCC specimens confined with FRP declines with increasing load eccentricity. However, numerous studies have argued that concrete's shear damage may be efficiently reduced by confining a layer of CFRP sheets, which also changes the column specimen's failure mode from brittle-shear to ductile-flexural [33]. Also, the test results showed that the RCC's lateral displacement was significantly decreased under impact loading after being confined by the CFRP [34].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Reinforced Concrete Circular Columns Strengthening With CFRP under Concentric and Eccentric Loadings

Harba

Abdulridha

Al-Shaar

2022

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

The purpose of this study is to explore the numerical behavior of circular RC short columns with different degrees of confinement with CFRP (0%, 25%, 50%, and 100%) wraps under concentric and eccentric loading. The numerical analysis carried out by using an improved concrete plastic-damage model (CDPM) implemented in ABAQUS software for finite element (FE) analysis. The FE model simulated a total of twenty-four numerical specimens. The findings were matched to published experimental test results in the literature. The findings of the FE model and the experimental data were good similar. As a consequence, the model was found to be valid. The numerical results shows that as load eccentricity increased, the load carrying capacity of columns decreased for unconfined specimens, whereas the decline in strength for confined specimens becomes limited as the degrees of confinement ratio increased. In addition, increasing the CFRP confinement ratio improves the column's load-bearing capability at the same load eccentricity.

show abstract

The effect of CFRP-shear strengthening on existing circular RC columns under impact loads

Cited by 36 publications

References 33 publications

Enhancing Resilience and Self-Centering of Existing RC Coupled and Single Shear Walls Using EB-FRP: State-of-the-Art Review and Research Needs

Enhancing Resilience and Self-Centering of Existing RC Coupled and Single Shear Walls Using EB-FRP: State-of-the-Art Review and Research Needs

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

Numerical Analysis of Reinforced Concrete Circular Columns Strengthening With CFRP under Concentric and Eccentric Loadings

Contact Info

Product

Resources

About