Analytical and finite element studies on hybrid FRP strengthened RC column elements under axial and eccentric compression

Chellapandian, M.; Prakash, Shamsher; Rajagopal, Amirtham

doi:10.1016/j.compstruct.2017.09.109

Cited by 79 publications

(27 citation statements)

References 36 publications

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“…reported similar results in their vulnerability study of non-seismically designed circular RC bridge piers retrofitted with CFRP composites Chellapandian et al (2018). carried out numerical and analytical investigations to evaluate the influence of hybrid strengthening on initial post-cracking stiffness, peak and post-peak behaviour, and the failure mechanism of square RC columns subjected to axial and eccentric loadings.…”

mentioning

confidence: 62%

“…In addition to experimental studies and confinement models, some researchers (Malvar et al, 2004;Yu et al, 2010;Karabinis et al, 2008;Zeng et al, 2018;Parghi and Alam, 2017;Parghi and Alam, 2016;Chellapandian et al, 2018;Lin and Teng, 2017;Feng et al, 2002;Hajsadeghi et al, 2011;Chakrabarti et al, 2008;Mostofinejad and Saadatmand, 2010;Wu et al, 2009;Hu et al, 2011;Mirmiran et al, 2000) have also performed numerical investigations to understand the overall behaviour of FRP-confined concrete columns using the finite element method (FEM). The FEM is a numerical method that solves the governing ordinary and partial differential equations of a system through the discretisation process.…”

Section: Finite Element Analysismentioning

confidence: 99%

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Experimental studies and theoretical models for concrete columns confined with FRP composites: a review

Gora

Jaganathan

Amwar

et al. 2019

WJE

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Purpose Advanced fibre-reinforced polymer (FRP) composites have been increasingly used over the past two decades for strengthening, upgrading and restoring degraded civil engineering infrastructure. Substantial experimental investigations have been conducted in recent years to understand the compressive behaviour of FRP-confined concrete columns. A considerable number of confinement models to predict the compressive behaviour of FRP-strengthened concrete columns have been developed from the results of these experimental investigations. The purpose of this paper is to present a comprehensive review of experimental investigations and theoretical models of circular and non-circular concrete columns confined with FRP reinforcement. Design/methodology/approach The paper reviews previous experimental test results on circular and non-circular concrete columns confined with FRP reinforcement under concentric and eccentric loading conditions and highlights the behaviour and mechanics of FRP confinement in these columns. The paper also reviews existing confinement models for concrete columns confined with FRP composites in both circular and non-circular sections. Findings This paper demonstrates that the performance and effectiveness of FRP confinement in concrete columns have been extensively investigated and proven effective in enhancing the structural performance and ductility of strengthened columns. The strength and ductility enhancement depend on the number of FRP layers, concrete compressive strength, corner radius for non-circular columns and intensity of load eccentricity for eccentrically loaded columns. The impact of existing theoretical models and directions for future research are also presented. Originality/value Potential researchers will gain insight into existing experimental and theoretical studies and future research directions.

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confidence: 62%

Section: Finite Element Analysismentioning

confidence: 99%

Experimental studies and theoretical models for concrete columns confined with FRP composites: a review

Gora

Jaganathan

Amwar

et al. 2019

WJE

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“…The bond strength at the overlap length of the wrapped FRP sheets is depending on the level of impregnation of the utilized adhesive (Moretti and Arvanitopoulos, 2018), also the debonding load has been theoretically estimated by Colombi et al (2014). The analytical models have been adopted to evaluate the influence of the FRP strength on the column behavior (Chellapandian et al, 2018; Lee et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Strengthening of deficient reinforced concrete columns subjected to concentric and eccentric loads

El-Kashif

Hazem

Rozik

et al. 2019

Advances in Structural Engineering

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In this research, different techniques of repair of deficient reinforced concrete columns are compared. These include carbon fiber–reinforced polymer sheets, steel jackets, and reinforced concrete jackets. The experimental investigation includes testing of 16 deficient columns of dimensions 150 × 150 × 800 mm subjected to concentric and eccentric loading up to failure. Two main variables are considered: the load eccentricity and the strengthening technique. The experimental results showed that the three strengthening techniques used in this research significantly improved the ultimate load carrying capacity in all cases of loading. Also, in the two cases of concentric loading and big eccentricity of 150 mm, carbon fiber–reinforced polymer wrapping achieved the highest ductility and absorbed energy capacity. In addition, strengthening with reinforced concrete jacket improved the initial stiffness and toughness. The cracking load, ultimate load, and ductility of the deficient columns after strengthening were experimentally recorded and compared. The results can help the structural engineer to consider the most efficient method of repair for such columns.

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“…Experimental results interpreted and hybrid strengthening technique was found to be more efficient, leading to a higher increase in strength, stiffness, and ductility as compared to only NSM strengthened or only CFRP confined RC columns [32]. Chellapandian et al (2018) conducted a related analytical and numerical study on the behavior of axially loaded square cross-section reinforced short concrete columns loaded consecutively and eccentrically in another work. A computer simulation by a total of 20 columns was carried out using ABAQUS finite element software.…”

Section: Introductionmentioning

confidence: 99%

Strengthening of Columns with Different Innovative Composite Materials for RC Buildings without Sufficient Earthquake Resistance

2022

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Reinforced-concrete columns were strengthened with carbon fiber reinforced polymer and textile reinforced mortar. After that, these columns were subjected to axial load. Load-displacement measurement was taken during the experiment. Figure. Dimensions of test specimen and load-displacement graphics AimThe aim of the study is to investigate the effectiveness of CFRP and TRM in the strengthening of RC columns.

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Analytical and finite element studies on hybrid FRP strengthened RC column elements under axial and eccentric compression

Cited by 79 publications

References 36 publications

Experimental studies and theoretical models for concrete columns confined with FRP composites: a review

Experimental studies and theoretical models for concrete columns confined with FRP composites: a review

Strengthening of deficient reinforced concrete columns subjected to concentric and eccentric loads

Strengthening of Columns with Different Innovative Composite Materials for RC Buildings without Sufficient Earthquake Resistance

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