Abstract
The role of a beam-column joint is very vital in RCC framed structures. Most of the structural collapses due to earthquakes have been initiated by the failure of the beam-column joints and therefore understanding the behavior of beam-column joints is important. Large numbers of retrofitting techniques are being adopted worldwide to strengthen the beam-column joint. This paper presents the results of the first phase of experimental investigation on retrofitting of an external beam-column joint by externally bonded basalt fabrics. Eleven specimens of external beam-column joints using strong column-weak beam concept were prepared and tested under static loading conditions. Three specimens were tested and considered as control specimens. Remaining eight specimens were subjected to an induced damage by preloading them up to 50% of ultimate load recorded in control specimens. The damaged specimens were then retrofitted with basalt fiber fabric adopting four different configurations. The retrofitted specimens were tested for their ultimate capacity and the outputs were compared with that of the control specimens. The test results show that basalt textile reinforcement enhances the performance of the retrofitted specimens.
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