STUDY OF BENDING BEHAVIOR OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH NEAR-SURFACE-MOUNTED PRESTRESSED CFRP RODS

CHEN Hua; CHEN Yaojia; XIE Bin; DENG Langni

doi:10.13204/j.gyjz201908210007

Volume 50 Issue 9

Nov. 2020

Turn off MathJax

Article Contents

Article Navigation > INDUSTRIAL CONSTRUCTION > 2020 > 50(9): 168-173

CHEN Hua, CHEN Yaojia, XIE Bin, DENG Langni. STUDY OF BENDING BEHAVIOR OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH NEAR-SURFACE-MOUNTED PRESTRESSED CFRP RODS[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(9): 168-173. doi: 10.13204/j.gyjz201908210007

Citation:

CHEN Hua, CHEN Yaojia, XIE Bin, DENG Langni. STUDY OF BENDING BEHAVIOR OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH NEAR-SURFACE-MOUNTED PRESTRESSED CFRP RODS[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(9): 168-173. doi: 10.13204/j.gyjz201908210007

Citation:

PDF( 0 KB)

STUDY OF BENDING BEHAVIOR OF REINFORCED CONCRETE BEAMS STRENGTHENED WITH NEAR-SURFACE-MOUNTED PRESTRESSED CFRP RODS

doi: 10.13204/j.gyjz201908210007

CHEN Hua^1,2,
CHEN Yaojia¹,
XIE Bin¹,
DENG Langni^{1
,
,}

1. School of Civil and Architecture Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China;
2. School of Civil and Architecture Engineering, Nanning University, Nanning 530200, China

Received Date: 2019-08-21
Publish Date: 2020-11-23

Abstract

Abstract

To investigate the bending behavior of reinforced concrete beams reinforced with near-surface-mounted prestressed CFRP rods, a total 5 reinforced specimens and 1 unreinforced specimen were designed for bending test. Two parameters were considered in the test, the inital prestressed level of CFRP rods and longitudinal steel ratio. Three important properties, such as bearing capacity, ductility and energy dissipation capacity of CFRP rods were analyzed in detail and the calculation method of flexural bearing capacity of reinforced specimens was discussed. The results showed that the failure modes of reinforced specimens were mostly ductile failure, and some specimens were brittle failure. With the increase of the initial prestress level of CFRP rods, the ultimate bearing capacity of strengthened specimens increased and the maximum increase was 98%, but the ductility of strengthened specimens was reduced. The main strain of reinforced specimen could conform to stress plain section assumption. With the same longitudinal reinforcement ratio, the energy dissipation capacity of the specimens decreased with the increase of the initial prestress level of the CFRP rods; when the initial prestress level was the same, increasing the longitudinal reinforcement ratio could improve the energy dissipation capacity of the specimens to a certain extent.
- near-surface-mounted technique,
- prestress force,
- CFRP rods,
- strengthening,
- reinforced concrete beams,
- bending behavior

FullText(HTML)

References(17)

References

LORENZIS L D, TENG J G. Near-Surface Mounted FRP Reinforcement:An Emerging Technique for Strengthening Structures[J]. Composites Part B:Engineering, 2007, 38(2):119-143.

谢标云, 杨勇, 周丕健, 等. 表层嵌贴碳纤维筋与混凝土粘结强度试验研究[J]. 工业建筑, 2010, 40(8):103-106.

ZHANG S S, TENG J G, YU T. Bond-Slip Model for CFRP Strips Near-Surface Mounted to Concrete[C]//11th International Symposium on Fiber Reinforced Polymer for Reinforced Concrete Stuctures (FRPRCS-11). 2013.

郝海霞, 张建仁, 高勇, 等. 表层嵌贴CFRP-混凝土界面粘结性能简化分析[J]. 中国公路学报, 2015, 28(4):52-59.

COSTA I, BARROS J. Prestress Losses in NSM-CFRP Flexurally Strengthened RC Beams[J]. Strain, 2015, 51(4):276-287.

REZAZADEH M, COSTA I, BARROS J. Influence of Prestress Level on NSM CFRP Laminates for the Flexural Strengthening of RC Beams[J]. Composite Structures, 2014, 116:489-500.

彭晖, 张建仁, 何贤锋, 等. 表层嵌贴预应力CFRP-Strip加固钢筋混凝土梁的受力性能研究[J]. 工程力学, 2012(增刊1):79-85.

BARROS J A O, BAGHI H, DIAS S J E, et al. A FEM-Based Model to Predict the Behaviour of RC Beams Shear Strengthened According to the NSM Technique[J]. Engineering Structures, 2013, 56:1192-1206.

WAHAB N, SOUDKI K A, TOPPER T. Experimental Investigation of Bond Fatigue Behavior of Concrete Beams Strengthened with NSM Prestressed CFRP Rods[J]. Journal of Composites for Construction, 2012, 16(6):684-692.

EL-HACHA R, OUDAH F. Postfatigue Monotonic Behavior of RC Beams Strengthened with Prestressed NSM CFRP Strips:Ductility Evaluation[J]. Journal of Composites for Construction, 2014, 18(3):161-173.

张智梅, 熊浩. 表层嵌贴预应力CFRP板条加固RC梁抗弯性能有限元分析[J]. 上海大学学报(自然科学版), 2018,24(1):100-107.

OMRAN H Y, EL-HACHA R. Nonlinear 3D Finite Element Modeling of RC Beams Strengthened with Prestressed NSM-CFRP Strips[J]. Construction and Building Materials, 2012, 31:74-85.

陈华, 陈耀嘉, 谢斌, 等. CFRP筋粘结式楔型锚具锚固性能分析[J]. 广西大学学报(自然科学版), 2019, 44(3):798-807.

叶列平,冯鹏,林旭川,等. 配置FRP的结构构件的安全储备指标及分析[J]. 土木工程学报, 2009, 42(9):21-31.

中华人民共和国住房和城乡建设部. 混凝土结构加固设计规范:GB 50367-2013[S]. 北京:中国建筑工业出版社,2013.

EL ZAREEF M A, EL MADAWY M E. Effect of Glass-Fiber Rods on the Ductile Behaviour of Reinforced Concrete Beams[J]. Alexandria Engineering Journal, 2018, 57:4071-4079.

张秀芳, 徐世烺. 钢筋增强超高韧性水泥基复合材料梁的弯曲承载力及延性分析[J]. 工程力学, 2009, 26(12):133-141.

Relative Articles

Supplements(0)

Cited By

Proportional views