الفهرس 
Strengthening of Steel Buildings
EXPERIMENTAL PROGRAMOnly 14 pages are availabe for public view
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Abstract
The strengthening of steel structural elements using CFRP laminates has been applied widely in the last few years. The main goal of this research work is to evaluate the efficiency of the locally available CFRP laminates and bonding materials in shear strengthening of I-section steel beams. To achieve this goal, the experimental program was divided into two stages :
In the first sage, three types of carbon fiber laminates together with three types of bonding materials (commonly used in the local market) were included in the program. Combinations made from these materials were tested with steel plates in tension, single shear, and double shear. This stage ends up with the best combination which gives the highest strength results.
In the second stage, six full scale steel I-beams were investigated experimentally using the best combination resulting from the first stage. The first beam was used as a control beam without any strengthening. The second and third beams were strengthened in shear by CFRP laminates in two different directions without any end-anchorage. The fourth and fifth beams were strengthened in shear exactly like the second and third beams but with two different techniques of mechanical end-anchorages (steel plates and bolts). The sixth and last beam was strengthened in shear by traditional welded steel plate. Stiffness and strength of all the six beams were determined experimentally. Results of the experimental program showed that, applying the CFRP laminates improves shear strength of the tested beams. Furthermore, using the two different techniques of end anchorage had significantly improved the load carrying capacity and reduced deformations and strains of the whole tested beams especially in the elastic zone.