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논문 기본 정보

자료유형
학술저널
저자정보
Donguk Choi (Hankyong National University) Seongwon Hong (Korea National University) Myung-Kwan Lim (Songwon University) Sang-Su Ha (Kangnam University) Sorrasak Vachirapanyakun (Hankyong National University)
저널정보
한국콘크리트학회 International Journal of Concrete Structures and Materials International Journal of Concrete Structures and Materials Vol.15 No.6
발행연도
2021.11
수록면
779 - 798 (20page)

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초록· 키워드

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The effectiveness of seismic retrofitting using three different fibers-carbon fiber (CF), glass fiber (GF), polyethylene terephthalate (PET) fiber-and a fiber combination of aramid fiber (AF) and PET fiber (called hybrid fiber reinforced polymer (HF)) wrapped on reinforced concrete (RC) circular columns was experimentally evaluated. A total of 11 RC circular columns were tested: three control columns and eight retrofitted columns in three different test groups. The purpose of fiber wrapping was flexural strength improvement as well as enhancement of rotational capacity in the plastic hinge region. Mechanical properties of CF, GF, AF, and PET were first defined; that is, CF, GF, and AF exhibited linear stress-strain behavior with limited ultimate strain capacity typically less than 3%, while ductile PET exhibited as much as 15% strain and non-linear stress-strain behavior with a very low elastic modulus. In the RC column tests, all three different fibers and the AF + PET fiber combination were effective in enhancing the strength and ductility but resulted in different structural behaviors and failure modes depending on the fiber type and the fiber amount used. The column sections were then analytically studied by section analysis using the behavior of confined concrete, the non-linear relationship of fiber-reinforced polymer (FRP), and the actual material properties of reinforcement. The analytical and experimental results revealed that ductile PET is beneficial, as it demonstrates more ductile behavior with a degree of strength enhancement similar to that of CF and GF.
#Axial stiffness #Confined concrete #Ductile fiber #Hybrid fiber #Section analysis

목차

Abstract
1. Introduction
2. Experimental program
3. Test results
4. Analyses
5. Conclusions
References

참고문헌 (26)

참고문헌 신청
American Concrete Institute Committee / 2003 / Guide for the Design and Construction of Concrete Reinforced with FRP Bars (ACI 440-1R-03) / ACI :42 google schola American Concrete Institute Committee / 2007 / Report on Fiber-Reinforced Polymer (FRP) Reinforcement for Concrete Structures google schola American Society for Testing and Materials International / 2008 / Standard test method for tensile properties of plastic (ASTM D638-08) / ASTM :16 google schola Dhannyanto Anggawidjaja / 2006 / Deformation capacity of RC piers wrapped by new fiber-reinforced polymer with large fracture strain / Cement and Concrete Composites 28(10):914~927 Crossref Cao, V. V. / 2019 / Comparison of CFRP and GFRP wraps on reducing seismic damage of deficient reinforced concrete structures / International Journal of Civil Engineering 17:1667~1681 google schola

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