EXPERIMENTAL TESTING AND NUMERICAL MODELLING OF RC RECTANGULAR COLUMNS UPGRADED USING FRP WRAPPING | ||||
| The International Conference on Civil and Architecture Engineering | ||||
| Article 20, Volume 6, 6th International Conference on Civil and Architecture Engineering, May 2006, Page 75-88 PDF (391.69 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/iccae.2006.45765 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. A. Bitar1; H. M. Farag2; M. E. Issa3; M. A.N. Abdel-Mooty4 | ||||
| 1Graduate student, Syria. | ||||
| 2Egyptian Armed Forses. | ||||
| 3Professor, Department of Structural Engineering, Cairo University, Egypt. | ||||
| 4Professor, Department of Construction Engineering, American University in Cairo, Egypt. | ||||
| Abstract | ||||
| In order to evaluate the behaviour of square and rectangular concrete columns wrapped by fibre reinforced polymer (FRP) sheets, subjected to axial loading were studied. Six specimens were tested and numerically analyzed using finite element method (FEM). The factors affecting the performance of FRP wrapping in rectangular columns under the action of axial loads are considered in this paper. These factors include the rectangularity ratio of the column cross section. Techniques to improve the performance of strengthening rectangular columns were also proposed and evaluated in the paper. Such techniques include rounding the sharp edges of the columns, and transferring square into circular columns using mortar. A total of six half-scale reinforced concrete columns, divided into two groups, are tested in this research. The first group consists of three square columns, while the second group consists of three rectangular columns. A three-dimensional finite element models are developed to examine the structural behaviour of the RC columns before and after applying FRP sheet. Nonlinear finite element analysis is performed using the ANSYS program. Special elements SOLID 65, LINK 8, and SOLID 64 were used to represent concrete, discrete reinforcing steel bars, and FRP sheet, respectively. The experimentally evaluated nonlinear material properties for each material component are defined for the nonlinear finite element analysis. The numerically obtained results are correlated to the experimental ones. The developed finite element analysis models are capable of effectively simulating the behaviour of square and rectangular columns confined by FRP sheets when the proper material properties are adopted. | ||||
| Keywords | ||||
| Nonlinear finite element analysis; column strengthening; CFRP; experimental testing | ||||
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