Evaluation and comparison of GRP casing and CFRP sheets application on the behavior of circular reinforced concrete column made of normal and high-strength concrete

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Sajedi Seyed Fathollah; Shafieinia Mohsen

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Journal: JOURNAL OF CONCRETE RESEARCH Year:2019 | Volume:12 | Issue:2 Page(s): 61-76

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Title

Evaluation and comparison of GRP casing and CFRP sheets application on the behavior of circular reinforced concrete column made of normal and high-strength concrete

Author(s)

Sajedi Seyed Fathollah | Shafieinia Mohsen | Issue Writer Certificate

Keywords

Reinforced Concrete Columns (RCC)Q1

GRP casingQ1

CFRP wrappingQ1

Axial forceQ2

DuctilityQ2

Abstract

This paper presents the results of axial pressure testing on reinforced concrete columns loaded with confined normal concrete (NC) and high strength concrete (HSC) using glass-fiber reinforced plastic pipes (GRP) casing as well as carbon fiber reinforced polymer (CFRP). The major parameters in the experiments were the types of concrete, the effect of GRP casing and CFRP wrapping, as well as the number of CFRP layers. In this study, 12 cylindrical reinforced concrete columns (150 mm diameter and 600 mm height) were prepared and divided into two group, NC and HSC, and each group was divided into two part. In each part, one column was without CFRP strengthening layer, a column was wrapped with one CFRP layer and another column with two CFRP layers. All columns were tested under concentrated compression load. The results of the study showed that the utilization of CFRP wrapping and GRP casing improved compression capacity and Ductility of reinforced concrete columns. The addition of one and two layer-CFRP wrapping increased compression capacity in the NC group to an average of 18. 5 and 26. 5% and in the HSC group to an average of 10. 2 and 24. 8%. Meanwhile, the utilization of GRP casing increased the compression capacity of the columns by 3 times in the NC group and 2. 38 times in the HSC group. These results indicated that although both CFRP wrapping and GRP casing result in confinement, the GRP casing resulted in increased compression capacity and Ductility of the reinforced concrete columns due to higher confinement. Furthermore, the confinement effect was higher on columns with normal concrete.

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APA: Copy

Sajedi, Seyed Fathollah, & Shafieinia, Mohsen. (2019). Evaluation and comparison of GRP casing and CFRP sheets application on the behavior of circular reinforced concrete column made of normal and high-strength concrete. JOURNAL OF CONCRETE RESEARCH, 12(2 ), 61-76. SID. https://sid.ir/paper/197239/en

Vancouver: Copy

Sajedi Seyed Fathollah, Shafieinia Mohsen. Evaluation and comparison of GRP casing and CFRP sheets application on the behavior of circular reinforced concrete column made of normal and high-strength concrete. JOURNAL OF CONCRETE RESEARCH[Internet]. 2019;12(2 ):61-76. Available from: https://sid.ir/paper/197239/en

IEEE: Copy

Seyed Fathollah Sajedi, and Mohsen Shafieinia, “Evaluation and comparison of GRP casing and CFRP sheets application on the behavior of circular reinforced concrete column made of normal and high-strength concrete,” JOURNAL OF CONCRETE RESEARCH, vol. 12, no. 2 , pp. 61–76, 2019, [Online]. Available: https://sid.ir/paper/197239/en

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