Retrofitting of RCC Beam in Flexure by External Cabling Method

In the world most of the RCC structures are damage before their service period due to several causes such as seismic forces like earthquakes, sudden impact load and improper structural design. Sometimes the whole replacement of structure is not possible because of high cost and time taking problem. In such a condition retrofitting technique for the damaged portion of the structure is more significant solution for strengthening the structures. Different retrofitting techniques are applied to strengthen the structure as their ease of uses. The retrofitting of RCC beam by external cabling method is very effective and rapid technique for strengthening the structure in both flexure and shear. In this investigation the external reinforcing steel bar as a cable was used for strengthening the RC beam in flexure only. Three number of RCC beam i.e. control beam of size 1800mm length, 100mm width and 150mm overall depth were casted for experimental study. The loads were applied at centre of each beam up to cracking and then up to failure point and load deflection for each beam were obtained. Then reinforcing steel bar was externally applied at top and bottom face of the each damaged beam. The effect of retrofitting by external reinforcing steel bar on RC beam was investigated.