Seismic behavior of PVC-CFRP confined reinforced concrete columns: An experimental study

Yu, Feng; Yin, Wanyun; Cheng, Anchun; Vu, Quang-Viet; Wang, Shilong; Kong, Zhengyi

doi:10.1016/j.istruc.2021.03.003

Cited by 13 publications

(4 citation statements)

References 30 publications

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“…As expected, the CFRP strips spacing exhibits a slight impact on the stiffness degradation, nevertheless, as described in the Ref. [ 51 ], the efficacy of the CFRP strips in the joints with STC can probably be found in the high axial compression ratio specimens. In addition, the specimen PJ-5 presents a relatively excellent energy dissipation capacity, especially in the ascending stage, where its

is 20.9% to 38.5% higher than that of the specimen PJ-7, which may attribute to the increased flexural stiffness of the frame beam.…”

Section: Experimental Observations and Resultssupporting

confidence: 77%

Experimental and Numerical Investigations on Seismic Behavior of RC Beam to PVC-CFRP Confined Concrete Column Exterior Joint with Steel Tube Connector

Tan

Bao

et al. 2022

Polymers

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Recently, substantial investigations were developed on a polyvinyl chloride (PVC)-carbon fiber-reinforced polymer (CFRP) confined concrete (PFCC) structure owing to its superior mechanical behavior and durability. However, a convenient and effective joint configuration between the PFCC columns and reinforced concrete (RC) beams still requires in-depth study. In the present work, the seismic performance of an RC beam to PFCC column exterior joint with steel tube connector (STC) is systematically studied. Eleven joint specimens are fabricated and tested, with the steel ratio of STC, reinforcement ratio of the frame beam, axial compression ratio, stirrup ratio of the joint and CFRP strips spacing as the design parameters. The experimental results, that is, 8 the failure modes, hysteretic response, ductility, strength, stiffness and energy dissipation, are analyzed. All specimens exhibit joint shear failure, although the joints with STC exhibit significantly better performance those of ordinary joint. In addition to reducing the axial compression ratio, the reinforcement ratio of the frame beam or increasing the stirrup ratio of the joint can also produce a positive effect. Furthermore, the numerical analysis of the exterior joints is performed; the calculated skeleton curves agree well with the test results, and additional parametric studies (i.e., the diameter, height and concrete strength of the joint) are carried out based on the verified numerical model.

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is 20.9% to 38.5% higher than that of the specimen PJ-7, which may attribute to the increased flexural stiffness of the frame beam.…”

Section: Experimental Observations and Resultssupporting

confidence: 77%

Experimental and Numerical Investigations on Seismic Behavior of RC Beam to PVC-CFRP Confined Concrete Column Exterior Joint with Steel Tube Connector

Tan

Bao

et al. 2022

Polymers

Self Cite

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“…There are methods for modeling numerical equations, such as the differential orthogonal method [52], Bessel multi-step method [53], and finite difference method [54]. According to references [52][53][54][55][56][57] and experimental findings, it has been observed that the ductility coefficient of the component is associated with the axial load ratio, volumetric From Figure 7, it can be seen that compared with the unreinforced column, the reinforced specimens significantly improved their energy dissipation capacity, especially the specimens with mixed reinforcement, which increased their energy dissipation capacity by 3.2 times. It can be concluded that the energy dissipation capacity of the specimen is most significantly improved under the mixed reinforcement of prestressed steel wire rope and polyurethane cement composite material, and this reinforcement method provides the best constraint effect for the specimen.…”

Section: Calculated Ductility Coefficient Of the Componentmentioning

confidence: 99%

“…There are methods for modeling numerical equations, such as the differential orthogonal method [52], Bessel multi-step method [53], and finite difference method [54]. According to references [52][53][54][55][56][57] and experimental findings, it has been observed that the ductility coefficient of the component is associated with the axial load ratio, volumetric stirrup spacing characteristic value, and the volumetric stirrup characteristic value of the strengthening material. The approach for calculating the overall stirrup characteristic value is based on the methodology outlined in references [52,56] for the volumetric stirrup characteristic values provided for stirrups and carbon fibers:…”

Section: Calculated Ductility Coefficient Of the Componentmentioning

confidence: 99%

Seismic Performance Analysis of Concrete Columns Reinforced with Prestressed Wire Ropes Embedded in Polyurethane Cement Composites

Guo,

Zhang,

Chen

et al. 2024

Buildings

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In order to improve the seismic performance of reinforced concrete (RC) columns, a reinforcement technology using prestressed steel wire ropes embedded in polyurethane cement composite material is proposed. Four concrete columns reinforced with different materials were subjected to a combination of axial compression and horizontally repeated loading tests (one of which was not reinforced, while the remaining three were reinforced with prestressed steel wire rope, polyurethane cement composite material, and prestressed steel wire ropes embedded in polyurethane cement composite material). The experimental results show that the ductility and energy dissipation capacity of reinforced concrete columns after reinforcement are significantly improved. After strengthening with prestressed steel wire ropes embedded in polyurethane cement composite material, the ultimate horizontal displacement and energy dissipation capacity of reinforced concrete columns were significantly improved, which were 69% and 3.2 times higher than those of unreinforced columns, respectively.

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“…To reach more accurate results, they adopted Mander's model 2 and developed an auto‐adjustable stress–strain relation based on the size of the compression zone or the eccentricity of the axial load. Yu et al 15 studied experimentally the seismic response of PVC–CFRP confined RC columns under axial compressive and horizontal cyclic loads. They found that for the specimens with a higher axial compression ratio, the space between CFRP strips has a more significant influence on the secant stiffness evolution.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear finite element analysis of reinforced concrete columns: Evaluation of different modeling approaches for considering stirrup confinement effects

Amirkhani

Lezgy-Nazargah

2021

Structural Concrete

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The present study aimed to introduce an accurate modeling strategy for the three‐dimensional (3D) nonlinear finite element analysis of reinforced concrete (RC) columns considering the effects of the stirrup confinement. For this purpose, concrete columns with different geometric characteristics and various reinforcement details whose experimental test data are available, were analyzed using the finite element method. The concrete damaged plasticity (CDP) was used to model the nonlinear behavior of the concrete material in the compression and the tension. The ideal elastic–plastic constitutive law was utilized for modeling the behavior of longitudinal and transverse rebars. Through comparing the experimental data and numerical results, the effect of various parameters, such as the type of stress–strain relationships used for modeling the behavior of confined concrete and the type of element used to model the stirrups, were evaluated. Additionally, the sensitivity of numerical results against the CDP model parameters (i.e., the viscosity parameter, the flow potential eccentricity, the dilation angle, the ratio of biaxial compressive strength to its uniaxial compressive strength, and the ratio of the second stress invariant on the tensile meridian) were investigated. The results show that the presence and modeling of stirrups in the RC columns alone are not enough for capturing the effects of concrete confinement. The use of beam elements instead of truss elements for modeling the stirrups as well as the use of Vallenas stress–strain relations for modeling the uniaxial behavior confined concrete, leads to numerical results that are more close to the experimental data.

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Seismic behavior of PVC-CFRP confined reinforced concrete columns: An experimental study

Cited by 13 publications

References 30 publications

Experimental and Numerical Investigations on Seismic Behavior of RC Beam to PVC-CFRP Confined Concrete Column Exterior Joint with Steel Tube Connector

Experimental and Numerical Investigations on Seismic Behavior of RC Beam to PVC-CFRP Confined Concrete Column Exterior Joint with Steel Tube Connector

Seismic Performance Analysis of Concrete Columns Reinforced with Prestressed Wire Ropes Embedded in Polyurethane Cement Composites

Nonlinear finite element analysis of reinforced concrete columns: Evaluation of different modeling approaches for considering stirrup confinement effects

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