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