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Structural Engineering and Mechanics
  Volume 30, Number 2, September30 2008, pages 247-261
DOI: http://dx.doi.org/10.12989/sem.2008.30.2.247
 


Finite element analysis of shear-deficient RC beams strengthened with CFRP strips/sheets
H. K. Lee, S. K. Ha and M. Afzal

 
Abstract
    Performance of shear-deficient reinforced concrete (RC) beams strengthened with carbon fiber-reinforced polymer (CFRP) strips/sheets is analyzed through numerical simulations on four-point bending tests. The numerical simulations are carried out using the finite element (FE) program ABAQUS. A micromechanics-based constitutive model (Liang et al. 2006) is implemented into the FE program ABAQUS to model CFRP strips/sheets. The predicted results are compared with experiment data (Khalifa and Nanni 2002) to assess the accuracy of the proposed FE analysis approach. A series of numerical tests are conducted to investigate the influence of stirrup lay-ups on the shear strengthening performance of the CFRP strips/sheets, to illustrate the influence of the damage parameters on the microcrack density
evolution in concrete, and to investigate the shear and flexural strengthening performance of CFRP strips/sheets. It has been shown that the proposed FE analysis approach is suitable for the performance
prediction of RC beams strengthened with CFRP strips/sheets.
 
Key Words
    finite element analysis; performance prediction; CFRP strips/sheets; micromechanics-based constitutive model; load-deflection curve.
 
Address
H. K. Lee, S. K. Ha and M. Afzal: Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea
 

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