[1] Qian Chunxiang, Chen Shixin, Zheng Xiaoxia, Guo Zhanqi, et al. Calculation on uniaxial compressive strengthof high strength concrete after wrapped by FRP [J]. Journal of Southeast University (English Edition), 2004, 20 (3): 352-355. [doi:10.3969/j.issn.1003-7985.2004.03.017]
Copy
Calculation on uniaxial compressive strengthof high strength concrete after wrapped by FRP(
)
FRP约束高强混凝土轴心抗压强度的计算方法
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 20
- Issue:
- 2004 3
- Page:
- 352-355
- Research Field:
- Chemistry and Chemical Engineering
- Publishing date:
- 2004-09-30
Info
- Title:
- Calculation on uniaxial compressive strengthof high strength concrete after wrapped by FRP
- FRP约束高强混凝土轴心抗压强度的计算方法
- Author(s):
- Qian Chunxiang1, Chen Shixin1, Zheng Xiaoxia1, Guo Zhanqi2, Piet Stroeven2
-
1Department of Materials Science and Engineering, Southeast University, Nanjing 210096, China
2Faculty of Civil Engineering and Geoscience, Delft University of Technology, Delft, Netherlands
- Keywords:
- strengthening; high-strength concrete; fibre reinforced plastics(FRP); axial compressive strength; theoretical calculation
- PACS:
- TH16;TP39
- DOI:
- 10.3969/j.issn.1003-7985.2004.03.017
- Abstract:
- A theoretical calculation method of the axial compressive strength of a high strength concrete with fibre reinforced plastics(FRP)constraint is proposed. It is shown by test verification that the FRP strength devotion factor used for this method is in accord with actual conditions. FRP is not up to the ultimate strength when the concrete reaches the ultimate strength, whose strength devotion factor is in the range of 0. 28 to 0. 59, which is related to an elastic modulus. The method can be used to estimate axial compressive strength of the concrete strengthened with FRP. The theoretical strength is 10% to 30% higher than the measured one. The deviation comes mainly from a non-ideal bonding condition of FRP-concrete interfaces and discrete property of the testing data of compressive strength.
- 建立了一个用于估算FPR加固混凝土轴心抗压强度的数学模型, 该模型引入了FRP强度发挥系数(套箍发挥系数). 实验结果表明, 混凝土达到极限强度时, FRP并未达到极限强度, 其强度发挥系数在0. 28~0. 59之间, 与FRP的弹性模量有关. 该计算方法可用于估算FRP加固混凝土的轴心抗压强度, 其理论计算强度高于实测强度10%~30%, 偏差主要来自FRP与混凝土的界面粘结状况不理想及混凝土抗压强度数据的离散性等.
References:
[1] Yu Qing. The key problem of the research and application of FRP wrapping concrete column [J]. Industrial Architecture, 2001, 31(4): 1-4.
[2] Yc Lin, Zhang Shi, Mai Ylu-wing. Strengthening efficiency of E-Glass fibre composite jackets of different architectures for concrete column [J]. Applied Composite Materials, 1998, 5: 109-122.
[3] Li Jianchun, Bakoss Steve L, Samali Bijan, et al. Reinforcement of concrete beam-column connections with hybrid FRP sheet [J]. Composite Structures, 1999, 47(1-4): 805-812.
[4] Mander J B, Priestly M J N, Park R J T. Theoretical stress-strain model for confined concrete [J]. J Struct Engng, ASCE, 1988, 114(8): 1804-1826.
[5] Samaan M, Mirmiran A, Sahawy M. Model of concrete confined by fibre composites [J]. J Struct Engng, ASCE, 1998, 124(9): 1025-1031.
[6] Zhang Jiaqi, Wang Dingye, Wang Bo. The compressive strength of FRP wrapping concrete column[J]. Journal of Constructional Material, 2000, 3(4): 323-327.(in Chinese)
[7] Toutanji Houssam A. Durability characteristics of concrete columns confined with advanced composite materials [J]. Composite Structures, 1999, 44: 155-161.
[8] The Antiknock Laboratory of Tsinghua University. The calculation of steel reinforced concrete’s stress-strain curves and its work mechanism [M]. Beijing: Tsinghua University Press, 1996. 202-224.(in Chinese)
[9] Chen Shixin, Qian Chunxiang. The study of fibre wrapping concrete column [J]. The Productions of Concrete and Cement, 2001(6): 36-39.(in Chinese)
Memo
- Memo:
- Biography: Qian Chunxiang(1966—), female, doctor, professor, cxqian@seu.edu.cn.