Cyclic Behavior of Hybrid Columns Made of Ultra High Performance Concrete and Fiber Reinforced Polymers

Zohrevand, Pedram; Mirmiran, Amir

doi:10.1061/(asce)cc.1943-5614.0000234

Cited by 81 publications

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“…This has led to the development of more slender structural elements and the saving of materials and energy. The inherent qualities of UHPFRC such as its high compressive strength, suitable ductility and ideal tension strength has made it more suitable for application in special structures and their elements [2,6].…”

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confidence: 99%

Determining Shear Capacity of Ultra-high Performance Concrete Beams by Experiments and Comparison with Codes

Pourbaba

Joghataie

2017

Scientia Iranica

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In this research, nineteen specimens of ultra-high performance fiber-reinforced concrete rectangular beams are made and their shear resistance is determined experimentally. The results are compared with estimations by ACI 318, RILEM TC 162-TDF, Australian guideline and Iranian national building regulations. To compare the code estimations, the ratio of experimental shear strength to predicted shear strength is calculated for each code.This ratio is actually a measure of safety factor on one hand and a measure of precision of the estimation on the other hand. Based on the results of both studies, the authors conclude that the Australian guideline with a ratio of 2.5 provides the minimum experimental to predicted ratio while the Iranian National Building Regulations with a ratio of about 10 provides the highest experimental to predicted ratio. This ratio obtained for ACI and RILEM was about 8 and 3.6 respectively. The Iranian and ACI codes provide basically the same strength estimation but both are very conservative, which may be interpreted as mainly because the codes are dubious about the precision of their own estimations. However, RILEM and Australian codes, estimate the shear resistance with reasonable margin of safety.

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confidence: 99%

Determining Shear Capacity of Ultra-high Performance Concrete Beams by Experiments and Comparison with Codes

Pourbaba

Joghataie

2017

Scientia Iranica

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“…The performance of the steel-free UHPC-filled FRP tube (UHPCFFT) was studied as a cantilever column under pseudo-static tests. The UHPCFFT column showed significantly higher flexural strength and initial stiffness, but a limited plastic behavior with less residual displacements and a slightly lower ductility, as compared to its RC counterpart (Zohrevand and Mirmiran 2011a).…”

Section: Introductionmentioning

confidence: 90%

“…Considering the excellent material properties of fiber-reinforced polymers (FRP) such as high strength-to-weight and stiffness-to-weight ratios and good corrosion resistance , the authors recently developed a novel hybrid column combining UHPC and FRP materials (Zohrevand and Mirmiran 2011a). The column was made of an FRP tube filled with UHPC within the plastic hinge length and conventional concrete for the remainder of the column length, while no steel reinforcement was used in the column.…”

Section: Introductionmentioning

confidence: 99%

“…The column was made of an FRP tube filled with UHPC within the plastic hinge length and conventional concrete for the remainder of the column length, while no steel reinforcement was used in the column. The steel-free UHPC-filled FRP tube (UHPCFFT) was studied under reverse cyclic lateral loading and showed considerably higher flexural strength, lower residual drift, and similar energy dissipation, as compared to its RC counterpart (Zohrevand and Mirmiran 2011a).…”

Section: Introductionmentioning

confidence: 99%

“…Considering the exceptional properties of UHPC and FRP, the two were combined in a new generation of CFFT system (Zohrevand and Mirmiran 2011a) -a novel hybrid column, with no steel reinforcement, made of an FRP tube with off-axis fibers filled with UHPC within the plastic hinge region and conventional concrete for the remainder of the column length. The performance of the steel-free UHPC-filled FRP tube (UHPCFFT) was studied as a cantilever column under pseudo-static tests.…”

Section: Introductionmentioning

confidence: 99%

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Novel Hybrid Columns Made of Ultra-High Performance Concrete and Fiber Reinforced Polymers

Zohrevand¹

Self Cite

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Energy balance method for modeling ultimate strain of fiber‐reinforced polymer‐repaired concrete

Tijani

Lim

2019

Structural Concrete

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The energy balance method has been widely used in the extant literature to derive the ultimate axial strain of conventional confined concrete columns. However, researchers noted that this method yields unrealistic results compared to experimental data when it is applied to fiber-reinforced polymer (FRP) confined concrete columns. Therefore, it is deemed that the existing ultimate strain model based on the energy method cannot be directly applied to FRP-repaired concrete. With this model shortcoming in mind and through a theoretical analysis with proper calibration, the current study extended the energy balance approach to develop a generalized model to determine the ultimate strain of FRP repaired concrete columns. This proposed new model can be used to predict the ultimate strain of repaired columns under both concentric and eccentric loadings. Because this model is established in a unified form without any restrictions to the cross-sectional geometry, it is applicable to different shapes of repaired columns. On the other hand, although the energy balance method is unconservative for heavily damaged concrete, it exhibits a better performance with respect to the existing models when compared with the test result. K E Y W O R D Sconcrete structure, confinement, energy method, FRP, repairing, ultimate strain

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Cyclic Behavior of Hybrid Columns Made of Ultra High Performance Concrete and Fiber Reinforced Polymers

Cited by 81 publications

References 1 publication

Determining Shear Capacity of Ultra-high Performance Concrete Beams by Experiments and Comparison with Codes

Determining Shear Capacity of Ultra-high Performance Concrete Beams by Experiments and Comparison with Codes

Novel Hybrid Columns Made of Ultra-High Performance Concrete and Fiber Reinforced Polymers

Energy balance method for modeling ultimate strain of fiber‐reinforced polymer‐repaired concrete

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