Papers by Gobinath Selvaraju
Moderate and severe earthquakes have struck different places in the world, causing severe damage ... more Moderate and severe earthquakes have struck different places in the world, causing severe damage to reinforced concrete structures. Retrofitting the existing structures is one of the major challenges to face. One of the retrofit techniques of RC structural members is confinement with a composite enclosure. This external confinement of concrete by high strength Carbon Fibre Reinforced Polymer composites can significantly enhance the strength and ductility and will result in large energy absorption capacity of structural members. Beam-column joints, being the lateral and vertical load resisting members in framed RC structures are more vulnerable to failures during earthquakes and hence strengthening of the joints is often, the key to achieve successful seismic retrofit strategy.This paper depicts experimental investigations carried on RC frames subjected to broad band excitation, which are conducted to study the performance of wrapping on retrofit effects on it & the influence of Carbon Fibre Reinforced Polymer wrapping on aseismic performance of RC Frame. Wrapping is done externally at beam-column joints. For this purpose, a single bay three storied scaled down RC frame is subjected to dynamic loads under broadband excitation using servo-controlled hydraulic actuator, till model frame fails & this failed frame is strengthened by using Carbon Fibre Reinforced Polymer. The retrofit frame is subjected to the same intensity of dynamic excitation, till it fails. The uni-axial accelerometers is used at various storeys to quantify the absolute accelerations and the extent of its decay. The above investigations conducted on the RC frame revealed the performance of the retrofit measure adopted as diagnostic alternates.
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Papers by Gobinath Selvaraju