A REVIEW ON STRENGTHENING OF STEEL BUILT-UP BEAM WITH CFRP WRAPPING

Abstract

The experiment tests are conducted on hot rolled steel built-up beams on channel section with simply supported beam with one plate is connected on the top of the channel section. In this work, two ways of strength improvement is done by using carbon fibre reinforced polymer, one is flange strengthening and another is cross sectional strengthening. Tests are conducted on flange strengthening and cross sectional strengthening. The experimental beams are of lateral bracing in steel structures and steel storage tanks. In this work seven different types of strengthening configuration were used with two approaches. The final results shows that flange strengthening approach does not give good strength compared to control specimen in retrofitting of open cannel section with longer span, modified cross sectional improvement gave higher flexural strength. Increase in number of carbon fibre reinforced polymer layer wrinkling can be prevented