Numerical study on the cyclic response of AFRP reinforced columns with externally unbonded energy dissipaters

Efe, Steve; Shokouhian, Mehdi; Head, Monique; Chinaka, Emmanuel

doi:10.1080/15732479.2017.1345955

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…∆σ p = (240 − 335ω 0 )(0.45 + 5.5h/L)k 1 (6) where ω 0 is the combined reinforcing index; h is the section height; L is the span and k 1 is a coefficient associated with the pattern of loading on continuous beams. For the simply supported beams considered in this study, k 1 = 1.0.…”

Section: Analytical Study 41 Methodsmentioning

confidence: 99%

“…The utilization of fiber-reinforced polymer (FRP) reinforcement in engineering is widespread [ 3 , 4 ]. The composite reinforcement may be made of glass fiber-reinforced polymer (GFRP) [ 5 ], aramid fiber-reinforced polymer (AFRP) [ 6 ], basalt fiber-reinforced polymer (BFRP) [ 7 ] or carbon fiber-reinforced polymer (CFRP) [ 8 ]. Of various FRP composites, carbon fiber-reinforced polymer (CFRP) possesses the best resistance to creep, namely, it can sustain around 80% of the tensile strength without experiencing creep rupture [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Tendon-Related Variables on the Behavior of Externally CFRP Prestressed Concrete Beams

Lou

Pang

2023

Materials

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This work assesses the flexural performance of prestressed concrete beams with external carbon fiber-reinforced polymer (CFRP) tendons, focusing on tendon-related variables. A finite element analysis (FEA) method is verified. A numerical parametric analysis of prestressed concrete beams with external CFRP tendons is carried out. Four tendon-related variables are considered, namely, the area, initial prestress, depth and elastic modulus of tendons. The analysis shows that flexural ductility decreases as the tendon area, initial prestress or elastic modulus increases but is insensitive to the tendon depth. The ultimate tendon stress increment (Δσp) is influenced by all of the four variables investigated. JGJ 92-2016 (Chinese technical specification for concrete structures prestressed with unbonded tendons) significantly underestimates Δσp and, hence, is over-conservative for the strength design of these beams. An equation is proposed for calculating Δσp, taking into account all four variables investigated. An analytical model is then developed to estimate the flexural strength (Mu) of prestressed concrete beams with external CFRP tendons. The proposed analytical model shows good agreement with FEA, i.e., the mean discrepancy for Δσp is 0.9% with a standard deviation of 11.1%; and the mean discrepancy for Mu is −1.6% with a standard deviation of 2.1%.

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Section: Analytical Study 41 Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Tendon-Related Variables on the Behavior of Externally CFRP Prestressed Concrete Beams

Lou

Pang

2023

Materials

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“…In the previous tests conducted by the authors [ 44 ],

approximates 50% of the peak tensile strength

when the confinement effect of the surrounding concrete is accounted for. According to the ACI 440.1R-15 design code [ 5 ] and related research [ 43 , 45 ],

can be appropriately described as

where

is the elastic modulus of the GFRP bar in the tensile direction. In this paper,

is adopted.…”

Section: Hrc Bridge Column Assessmentmentioning

confidence: 99%

Time-Dependent Seismic Performance of Coastal Bridges Reinforced with Hybrid FRP and Steel Bars

et al. 2022

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To increase the durability and seismic resilience of coastal bridges, a hybrid reinforced concrete (HRC) bridge that incorporates both glass fiber-reinforced polymer (GFRP) bars and steel bars is proposed. The time-dependent seismic performance of the HRC bridge is comprehensively investigated at three levels, namely the material, bridge column and bridge structure levels. First, the decrease of tensile strength of GFRP bars over time is analyzed based on the Arrhenius theory, and corrosion initiation time and performance deterioration of steel bars are determined by Fick’s second law and an empirical formula. Second, an efficient finite element modeling method for aging HRC bridge columns is proposed. Simulation of the compression/tension behavior and the fracture failure of the GFRP bar is described. Hysteretic analysis is further conducted to investigate the time-dependent energy dissipation, ductility, residual displacement, bearing capacity and post-yield stiffness ratio. Meanwhile, comparisons of HRC bridge columns to reinforced concrete (RC) references are provided. Third, the seismic demand and damage evolution of deteriorated HRC bridge structures are investigated through dynamic time-history analysis. The results indicate that the corrosion-resistant GFRP bars contribute to improving the bearing capacity and to reducing the residual displacement of the HRC bridge. With an increase in service time, the seismic damage to the bridge column, abutment and expansion bearing increases, but the damage to fixed bearing decreases. Research results presented herein show that the HRC bridge is a promising alternative structure scheme in the marine environment.

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Rocking Response of AFRP Reinforced Concrete Columns with Unbonded Energy Dissipaters

Adegoke

Shokouhian

Head

et al. 2022

8th International Conference on Advanced Composite Materials in Bridges and Structures

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Numerical study on the cyclic response of AFRP reinforced columns with externally unbonded energy dissipaters

Cited by 6 publications

References 10 publications

Effect of Tendon-Related Variables on the Behavior of Externally CFRP Prestressed Concrete Beams

Effect of Tendon-Related Variables on the Behavior of Externally CFRP Prestressed Concrete Beams

Time-Dependent Seismic Performance of Coastal Bridges Reinforced with Hybrid FRP and Steel Bars

Rocking Response of AFRP Reinforced Concrete Columns with Unbonded Energy Dissipaters

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