Experimental investigation of stress–strain behavior of CFRP confined Low Strength Concrete (LSC) cylinders

Saeed, Hafiz Zain; Khan, Qaiser uz Zaman; Khan, Hammad Anis; Farooq, Rashid

doi:10.1016/j.conbuildmat.2015.12.061

Cited by 16 publications

(9 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The finite element modelling of cylinders confined with FRPs was done using the commercial software ABAQUS (version 6.14, Simulia corp., Providence, U.S, 2013). The results of proposed model were validated using the load-deflection curves from the literature [35]. A control cylinder was used to propose a numerical model after the calibration of different parameters such as dilation angle, viscosity parameter of concrete, mesh size and element types of the concrete.…”

Section: Nonlinear Finite Element Analysis (Nlfea)mentioning

confidence: 99%

“…The strength properties in the transverse direction were taken as small values compared with the properties in longitudinal direction [30]. Figure 10 shows the compressive strengths and strains of unconfined and confined concrete cylinders tested in the previous study [35]. The average stress-strain curves of experimental cylinders were plotted against the FEA results.…”

Section: Nonlinear Finite Element Analysis (Nlfea)mentioning

confidence: 99%

“…The average stress-strain curves of experimental cylinders were plotted against the FEA results. Shear moduli G12, G13, G23 (MPa) 9188.5, 12259, 5911 Figure 10 shows the compressive strengths and strains of unconfined and confined concrete cylinders tested in the previous study [35]. The average stress-strain curves of experimental cylinders were plotted against the FEA results.…”

Section: Nonlinear Finite Element Analysis (Nlfea)mentioning

confidence: 99%

See 2 more Smart Citations

Sustainable FRP-Confined Symmetric Concrete Structures: An Application Experimental and Numerical Validation Process for Reference Data

Raza¹,

Shah²,

Khan³

et al. 2020

Applied Sciences

View full text Add to dashboard Cite

The use of fiber-reinforced polymer (FRP) jackets as external confinement is becoming popular, especially in seismic areas, because of its ability to enhance the strength and ductility of reinforced concrete to perform as a sustainable symmetric structural member. Therefore, various researchers have worked out for the prediction of strength and strain models of FRP-confined concrete. This study presents the improved strain models for the FRP confined cylindrical concrete members. Different previously proposed models of axial strain of FRP-confined concrete were evaluated based on a large database of 678 specimens from previous experiments and an improved model was proposed using the general regression analysis technique. Furthermore, the proposed model was validated using the previous experimental work of FRP-wrapped concrete cylinders and their finite elements analysis (FEA) using the ABAQUS software. The accuracy of the proposed strain model was quite satisfactory in comparison with the previous experimental and FEA results of the present study. Moreover, the proposed empirical strain model was used for the parametric study to investigate the effect of different geometric and material parameters such as the compressive strength of unconfined concrete, diameter of the cylinder, elastic modulus and thickness of the FRP layers, on the axial strain of FRP-wrapped cylinders. A close agreement among the proposed strain models and experimental outputs was observed. This study will help in understanding the behavior of sustainable FRP-confined symmetric concrete members.

show abstract

Section: Nonlinear Finite Element Analysis (Nlfea)mentioning

confidence: 99%

Section: Nonlinear Finite Element Analysis (Nlfea)mentioning

confidence: 99%

Section: Nonlinear Finite Element Analysis (Nlfea)mentioning

confidence: 99%

See 1 more Smart Citation

Sustainable FRP-Confined Symmetric Concrete Structures: An Application Experimental and Numerical Validation Process for Reference Data

Raza¹,

Shah²,

Khan³

et al. 2020

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…The behavior of FRP-confined concrete and unconfined specimens exposed to elevated temperatures resulted in concrete losses as the rate of temperature increased. The properties affecting the behavior of FRP-confined concrete and the confinement effectiveness decreased with an increase in the compressive strength of concrete [12][13][14].…”

Section: Introductionmentioning

confidence: 98%

A Compressive Peak Strength Model for CFRP-Confined Thermal Insulation Materials under Elevated Temperature

Sio

Tsai

2019

Materials

View full text Add to dashboard Cite

In this paper, a compressive peak strength model for CFRP-confined thermal insulation materials under elevated temperature was proposed. The thermal insulation material was made by Portland cement with different portions of perlite. The compressive strengths of four different perlite ratios in weight, such as 0%, 10%, 20%, and 30% of thermal insulation materials, confined by one-layer, two-layer, and three-layer carbon fiber-reinforced polymer (CFRP) composite materials, were obtained. The test results indicated that the specimen’s compressive strength decreased with an increase in the amount of perlite replacement and increased with an increase in the number of CFRP wrapping layers. Based on the test results, a theoretical compressive peak strength model with some parameters was proposed. In the meantime, the compressive strengths of the above four different perlite ratios of thermal insulation materials under elevated temperature, such as ambient temperature, 100 °C, 150 °C, 200 °C, 250 °C, and 300 °C, were obtained. For compression tests of specimens with a fixed amount of perlite, the test results indicated that the specimen’s compressive strength decreased with an increase in temperature, highlighting a thermal softening phenomenon. Based on the test results, a compressive peak strength model with a thermal softening parameter was proposed to predict the peak strength under elevated temperature. Finally, a compressive peak strength model for thermal insulation material with CFRP confinement under different elevated temperature was derived, and it achieved acceptable results in comparison to the experimental results.

show abstract

“…The compressive strength models are proposed to calculate the maximum strength of concrete reinforced with steel plate, and fiber-reinforced plastic (FRP) composites. [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

A Constitutive Model of High-Early-Strength Cement with Perlite Powder as a Thermal-Insulating Material Confined by Caron Fiber Reinforced Plastics at Elevated Temperatures

Sio

Yang

et al. 2020

Polymers

View full text Add to dashboard Cite

A parabolic stress–strain constitutive model for inorganic thermal-insulating material confined by carbon fiber-reinforced polymer (CFRP) exposed to a surrounding elevated temperature was proposed in this paper. The thermal-insulating material used in this study was composed of high-early-strength cement (HESC) and perlite powder. The compression strengths of four kinds of perlite powder composition ratios of thermal-insulating materials cylindrical specimens which were confined by one, two, and three-layer CFRP composite materials were acquired. The experimental results showed that the compression strength was enhanced as the amount of perlite substitute decreased or as the number of CFRP wrapping layers increased. The Mohr–Columb failure criteria were adopted to predict the maximum compressive strength of CFRP-confined inorganic thermal-insulating material. The strain at the maximum compressive strength was found from the experimental results, and the corresponding axial strain at the maximum compressive strength in the constitutive model was determined from the regression analysis. Furthermore, the compressive strengths of the four different perlite composites of thermal-insulating materials were obtained when heating the specimens from ambient temperature to 300 °C. The compressive strength decreased with an increase in temperature, and a thermal softening parameter model was proposed; the thermal softening parameter was determined from the experimental maximum compressive strength at an elevated temperature. Combining the above two models, the constitutive model of HESC with perlite powder additive as a thermal-insulating material confined by CFRP under elevated temperature was proposed.

show abstract

Experimental investigation of stress–strain behavior of CFRP confined Low Strength Concrete (LSC) cylinders

Cited by 16 publications

References 10 publications

Sustainable FRP-Confined Symmetric Concrete Structures: An Application Experimental and Numerical Validation Process for Reference Data

Sustainable FRP-Confined Symmetric Concrete Structures: An Application Experimental and Numerical Validation Process for Reference Data

A Compressive Peak Strength Model for CFRP-Confined Thermal Insulation Materials under Elevated Temperature

A Constitutive Model of High-Early-Strength Cement with Perlite Powder as a Thermal-Insulating Material Confined by Caron Fiber Reinforced Plastics at Elevated Temperatures

Contact Info

Product

Resources

About