EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR OF CONCRETE BEAMS STRENGTHENED WITH NEAR-SURFACE MOUNTED GFRP BARS

Zhang Haixia; Kong Dandan; Liu Guorui

doi:10.13204/j.gyjz201110005

Volume 41 Issue 10

Dec. 2014

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Zhang Haixia, Kong Dandan, Liu Guorui. EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR OF CONCRETE BEAMS STRENGTHENED WITH NEAR-SURFACE MOUNTED GFRP BARS[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(10): 20-24. doi: 10.13204/j.gyjz201110005

Citation:

Zhang Haixia, Kong Dandan, Liu Guorui. EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR OF CONCRETE BEAMS STRENGTHENED WITH NEAR-SURFACE MOUNTED GFRP BARS[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(10): 20-24. doi: 10.13204/j.gyjz201110005

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EXPERIMENTAL STUDY ON FLEXURAL BEHAVIOR OF CONCRETE BEAMS STRENGTHENED WITH NEAR-SURFACE MOUNTED GFRP BARS

doi: 10.13204/j.gyjz201110005

1.
1. School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China;
2.
2. College of Civil Engineering,Hebei University of Technology,Tianjin 300132,China

Received Date: 2010-09-20
Publish Date: 2011-10-20

Abstract

Abstract

The objective of this study is to investigate the flexural behaviors of reinforced concrete beam with nearsurfacemounted (NSM) GFRP bars． The tests of a group of simply supported rectangular cross-section beams strengthened with NSM GFRP bars and two control beams are carried out． The mode of failure，load-deflection relationship，and load-strain curve of the all specimens are analyzed． Cracks propagation is discussed based on measured data． The two effect factors of ratio of steel reinforcement in the beam and amount of GFRP bars on flexural behaviour are studied further． The studies indicate that not only yield and ultimate load of the beam are significantly enhanced，but also the flexural stiffness in the yield and ultimate behavior state of the beam is improved by using NSM-GFRP bars． The studies also show that there has a beneficial contribution to restriction on crack propagation．
- near-surface mounted(NSM),
- GFRP bars,
- strengthening,
- reinforced concrete beam,
- flexural behavior

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References(12)

References

[2] De Lorenzis L.Strengthening of RC Structures with Near Surface Mounted FRP Rods [D].Le cec，Italy: Department of Innovation Engineering，University of Lecce，2002.

岳清瑞，李庆伟，杨勇新.纤维增强复合材料嵌入式加固技术[J].工业建筑，2004，34(4):1-4.

[3] Micelli F，Nanni A.Tensile Characterization of FRP Rods for Reinforced Concrete Structures [J].Mechanics of Composite Materials，2003，39(4):293-304.

[4] De Lorenzis L,Teng J G.Near-Surface Mounted FRP Reinforcement: An Emerging Technique for Strengthening Structures [J].Composites: Part B，2006(8):1-25.

[5] Taljsten B,Carolin A,Nordin H.Concrete Structures Strengthened with Near Surface Mounted Reinforcement of CFRP [J].Advances in Structural Engineering，2002，6 (3):201-213.

[6] Joseph R Y,Shawn P G，David W D.Flexural Behavior of Concrete Beams Strengthened with Near-Surface-Mounted CFRP strips [J].ACI Structural Journal，2007，104(4):430-437.

[7] 王天稳，尹志强.FRP 筋NSM 加固混凝土构件二次受力时抗弯承载力计算方法[J].武汉大学学报: 工学版，2005，38(4):55-58.

[8] 周朝阳，李毅卉，贺学军.T 形截面钢筋混凝土梁内嵌FRP 加固后抗弯承载力计算[J].铁道科学与工程学报，2005，2(4):50-53.

[9] 丁亚红，曾宪桃，王兴国.内嵌CFRP 板条加固混凝土梁试验研究[J].工业建筑，2006，36(7):89-91.

[10] 袁霓绯，姚谏.钢筋混凝土梁表层嵌贴CFRP 板抗弯承载力研究[J].工业建筑，2006，36(10):104-106.

[11] 杨勇，谢标云，聂建国，等.表层嵌贴碳纤维筋加固钢筋混凝土梁受力性能试验研究[J].工程力学，2009，26 (3):106-112.

[12] El-Hacha R,Rizkalla S H.Near-Surface-Mounted Fiber-Reinforced Polymer Reinforcements for Flexural Strengthening of Concrete Structures[J].ACI Structural Journal，2004，101 (5) :717-726．

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