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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.35 No.4
- 발행연도
- 2020.1
- 수록면
- 463 - 474 (12page)
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In this paper, the influence of adding multi-walled carbon nanotube (MWCNT) on the pull behavior of steel and GFRP bars in ultra-high-performance concrete (UHPC) was examined experimentally and numerically. For numerical analysis, 3D nonlinear finite element modeling (FEM) with the help of ABAQUS software was used. Mechanical properties of the specimens, including Young's modulus, tensile strength and compressive strength, were extracted from the experimental results of the tests performed on standard cube specimens and for different values of weight percent of MWCNTs. In order to consider more realistic assumptions, the bond between concrete and bar was simulated using adhesive surfaces and Cohesive Zone Model (CZM), whose parameters were obtained by calibrating the results of the finite element model with the experimental results of pullout tests. The accuracy of the results of the finite element model was proved with conducting the pullout experimental test which showed high accuracy of the proposed model. Then, the effect of different parameters such as the material of bar, the diameter of the bar, as well as the weight percent of MWCNT on the bond behavior of bar and UHPC were studied. The results suggest that modifying UHPC with MWCNT improves bond strength between concrete and bar. In MWCNT per 0.01 and 0.3 wt% of MWCNT, the maximum pullout strength of steel bar with a diameter of 16 mm increased by 52.5% and 58.7% compared to the control specimen (UHPC without nanoparticle). Also, this increase in GFRP bars with a diameter of 16 mm was 34.3% and 45%.
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참고문헌 (38)
참고문헌 신청
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Kapilesh Bhargava / 2007 / Corrosion-induced bond strength degradation in reinforced concrete—Analytical and empirical models / Nuclear Engineering and Design 237(11):1140~1157
Van Thang Vu / 2018 / Experimental study and modeling of the behavior of partially saturated asphalt concrete under freezing condition / Construction and Building Materials 163:169~178
Committee, A. / 2006 / Guide for the Design and Construction of Concrete Reinforced with FRP Bars (ACI 440.1 R-06) / American Concrete Institute
M. Dehestani / 2017 / On discrete element method for rebar-concrete interaction / Construction and Building Materials 151:220~227
Kapilesh Bhargava / 2007 / Corrosion-induced bond strength degradation in reinforced concrete—Analytical and empirical models / Nuclear Engineering and Design 237(11):1140~1157
Van Thang Vu / 2018 / Experimental study and modeling of the behavior of partially saturated asphalt concrete under freezing condition / Construction and Building Materials 163:169~178
Committee, A. / 2006 / Guide for the Design and Construction of Concrete Reinforced with FRP Bars (ACI 440.1 R-06) / American Concrete Institute
M. Dehestani / 2017 / On discrete element method for rebar-concrete interaction / Construction and Building Materials 151:220~227
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