EXPERIMENTAL RESEARCH ON THE BOND BEHAVIOR OF GFRP BARS IN BFRP-CONFINED CONCRETE

WANG Yanlei; WANG Mifeng; ZHANG Xue; XU Qingfeng

doi:10.13204/j.gyjz202003028

Volume 50 Issue 3

Mar. 2020

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WANG Yanlei, WANG Mifeng, ZHANG Xue, XU Qingfeng. EXPERIMENTAL RESEARCH ON THE BOND BEHAVIOR OF GFRP BARS IN BFRP-CONFINED CONCRETE[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(3): 160-166. doi: 10.13204/j.gyjz202003028

Citation:

WANG Yanlei, WANG Mifeng, ZHANG Xue, XU Qingfeng. EXPERIMENTAL RESEARCH ON THE BOND BEHAVIOR OF GFRP BARS IN BFRP-CONFINED CONCRETE[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(3): 160-166. doi: 10.13204/j.gyjz202003028

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EXPERIMENTAL RESEARCH ON THE BOND BEHAVIOR OF GFRP BARS IN BFRP-CONFINED CONCRETE

doi: 10.13204/j.gyjz202003028

1. School of Civil Engineering, Dalian University of Technology, Dalian 116024, China;
2. Shanghai Key Laboratory of Engineering Structure Safety, SRIBS, Shanghai 200032, China

Received Date: 2019-10-21

Abstract

Abstract

The bond behavior of GFRP bar in BFRP-confined concrete was experimentally investigated. 36 specimens were prepared for pull-out test. The test variables included the number of BFRP layers (0, 1, 2 and 3 layers of fiber fabric) and the compressive strength of concrete (40.6, 44.2 and 52.7 MPa). The test results indicated that for BFRP lateral confinement, the typical failure mode of specimens was changed from brittle splitting failure to ductile pull-out failure. The bond behavior between GFRP bars and concrete could be significantly improved due to the lateral confinement from the BFRP jacket. Compared with unconfined specimens, bond strength of confined specimens with one, two and three layers of BFRP increased by 25%~35%, 42%~56% and 52%~88%, respectively, corresponding to three different concrete strengths, and the average bond slip of FRP bars reaching to the bond strength increased by 47%~187%, 86%~267%, 168%~211%, respectively. The confinement from the outer BFRP jacket was activated when the bond stress of confined specimens approximately reached the bond strength of unconfined specimens. The radial confining stress corresponding to bond strength increased with the number of BFRP layers and the concrete strength. Under the same concrete strength conditions, the normalized bond strength of confined specimens approximately linearly increased with the increase of confinement stiffness ratio of BFRP.
- FRP bar,
- bond behavior,
- confined concrete,
- bond stress-slip relationship,
- confining stress

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References(21)

References

刘伟,谢友均,董必钦,等. 海砂特性及海砂混凝土力学性能的研究[J].硅酸盐通报,2014, 33(1):15-22.

赵晖,张亚梅,明静. 海洋环境条件下不同结构区域混凝土耐久性研究[J].工业建筑,2013, 43(7):86-90.

陆中宇,李永超,谢建和. 海水海砂混凝土内玄武岩纤维增强复材筋性能退化研究[J].工业建筑,2019, 49(9):18-21.

李彪,侯慕轶,杨勇新,等. 复材筋珊瑚骨料混凝土梁抗弯性能试验研究[J]. 工业建筑,2016, 46(11):181-184.

DONG Z, WU G, ZHAO X, et al. Long-Term Bond Durability of Fiber-Reinforced Polymer Bars Embedded in Seawater Sea-Sand Concrete Under Ocean Environments[J]. Journal of Composites for Construction, 2018, 22(5):04018042.

SALEH N, ASHOUR A, LAM D, et al. Experimental Investigation of Bond Behaviour of Two Common GFRP Bar Types in High-Strength Concrete[J]. Construction and Building Materials, 2019, 201:610-622.

HAO Q, WANG Y, ZHANG Z, et al. Bond Strength Improvement of GFRP Rebars with Different Rib Geometries[J]. Journal of Zhejiang University:Science A, 2007, 8(9):1356-1365.

VELJKOVIC A, CARVELLI V, HAFFKE M M, et al. Concrete Cover Effect on the Bond of GFRP Bar and Concrete Under Static Loading[J]. Composites Part B:Engineering, 2017, 124:40-53.

LEE J Y, KIM T Y, KIM T J, et al. Interfacial Bond Strength of Glass Fiber Reinforced Polymer Bars in High-Strength Concrete[J]. Composites Part B:Engineering, 2008, 39(2):258-270.

WON J P, PARK C G, KIM H H, et al. Effect of Fibers on the Bonds Between FRP Reinforcing Bars and High-Strength Concrete[J]. Composites Part B:Engineering, 2008, 39(5):747-755.

郝庆多,王言磊,欧进萍. 拉拔条件下GFRP筋与混凝土黏结强度试验研究[J]. 建筑结构学报, 2008(1):103-111.

HADI M N S, KHAN Q S, SHEIKH M N. Axial and Flexural Behavior of Unreinforced and FRP Bar Reinforced Circular Concrete Filled FRP Tube Columns[J]. Construction and Building Materials, 2016, 122:43-53.

THAMRIN R, KAKU T. Development Length Evaluation of Reinforced Concrete Beam with CFRP Bars[C]//Proceedings of International Symposium on Bond Behaviour of FRP in Structures (BBFS). Hong Kong:International Institute for FRP in Construction, 2005:385-392.

薛伟辰,王圆,方志庆. 黏砂变形GFRP筋与约束混凝土之间的黏结性能[J]. 建筑材料学报, 2013, 16(1):6-11.

GAO K, LI Z, ZHANG J, et al. Experimental Research on Bond Behavior Between GFRP Bars and Stirrups-Confined Concrete[J]. Applied Sciences-Basel, 2019, 9(7).DOI: 10.3390/app9071340.

Canadian Standard Association. Canadian Highway Bridge Design Code:CSA-S6-14[S]. Toronto:Canadian Standards Association, 2017.

Japan Society of Civil Engineers. Recommendation for Design and Construction of Concrete Structures Using Continuous Fiber Reinforcing Materials[S]. Tokyo:Japan Society of Civil Engineers, 1997.

王静辉,刘清,韩风霞,等. 玄武岩纤维布加固新疆杨木矩形截面长柱偏心受压力学性能试验研究[J]. 工业建筑, 2017, 47(5):85-89.

秦斌. 海水海砂混凝土基本力学性能研究[J]. 混凝土, 2019(2):90-91.

MOHAMMED T U, HAMADA H, YAMAJI T. Performance of Seawater-Mixed Concrete in the Tidal Environment[J]. Cement and Concrete Research, 2004, 34(4):593-601.

LAM L, TENG J G. Design-Oriented Stress-Strain Model for FRP-Confined Concrete[J]. Construction and Building Materials, 2003, 17(6/7):471-489.

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