FLEXURAL STRENGTHENING OF REINFORCED CONCRETE BEAMS USING EXTERNAL UNBONDED STEEL BARS | ||
| ERJ. Engineering Research Journal | ||
| Article 12, Volume 31, Issue 4, October 2008, Pages 407-412 PDF (339.46 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/erjm.2008.69831 | ||
| Authors | ||
| H. S. Khalil1; H. S. Soliman1; H. E. M. Sallam1; H. H. Shaheen2 | ||
| 1Materials Engineering Dept., Faculty of Eng., Zagazig University, Zagazig, EGYPT | ||
| 2Housing and Building Research Center, Cairo, Egypt | ||
| Abstract | ||
| The use of externally unbonded steel rods for strengthening beams in flexure was proposed as a new technique recently. This technique has advantages in speed and simplicity of installation over other established strengthening techniques. It was shown that the tectuuque could provide useful enhancements in load capacity in all but heavily reinforced cross-sections. The present work aims to further investigation of this developed technique. Factors such as the number of deflectors used and the ratio of external to internal reulforcement areas were considered. Results showed that an increase in the ultimate strength and an increase in the stiffness were obtained using the EUR method while maintaining the traditional ductility behavior of RC beams. This gain in strength and stilkess increased as the ratio of external to internal reinforcement areas or the umber of deflectors increased. However, a well protecting method should be provided to give the external reinforcement the aimed durability requirements. | ||
| Keywords | ||
| Reinforced concrete; Beams; strengthening; external unbonded bars | ||
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