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Strengthening of concrete using fiber reinforced polymers (FRP)
Engineering and Construction
Pages 15 (3765 words)
CHAPTER 5: ANALYSIS OF DATA The data has been gathered and the observations are made as to the effects of strengthening of the RC beam and column joints. Proprietary FRP composite (TFC®) made of CFRP is used to strengthen the beam-column joints which increase the ultimate load and ductility of the structure when compared to steel reinforcements.
Further, the energy dissipation capacity increases in multiples of 10of the retrofitted column-beam joints under increased displacements, till failure at 0.4g for unconfined frame and at 0.5g for confined frame. Accelerations of the shake table at 0.2g and 0.4g are observed and it is found that the acceleration of the shake table is higher under 0.4g by at least a factor of 10. Comparing accelerations of the left and right joints of the first and second floors respectively, it is found that the acceleration increases by at least a factor of 10between the floors and also based on higher accelerations of 0.4g when compared to 0.2g. The relative displacements of the first and second floor joints are measured and it is found that the relative displacement of the second floor joint was high (almost 4 times) to the point of breakdown while that of the first floor joints was same as that of the shake table at 0.4g. ...
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