In the paper a non-linear analysis of beam-column connections of framed reinforced concrete structures is reported. The analysis is made referring to existing reinforced concrete structures designed to sustain gravity loads and upgraded against seismic actions by us-ing FRP (Fiber Reinforced Polymers) reinforcements. The performed theoretical investigation focused on the development of a FE modelling, including materials non-linearity and orthotropy, and on the use of an analytical approach. Referring to an exterior beam-column joint, the behaviour of strengthened connections has been analysed and compared with that of the un-strengthened connection. Different strengthening configurations have been tested, aiming to increase the joint ultimate capacity and to allow the formation of plastic hinges at the beam end, as required by the “capacity design” approach. The theoretical results showed a good per-formance of used strengthening technique. Results were analysed and compared with that of an analytical approach able to furnish the ultimate capacity of the connections and the kind of fail-ure mode, showing similar prediction.
Modelling of RC beam-column connections strengthened byFRP reinforcements
AIELLO, Maria Antonietta;VINCENTI, ELISA;
2008-01-01
Abstract
In the paper a non-linear analysis of beam-column connections of framed reinforced concrete structures is reported. The analysis is made referring to existing reinforced concrete structures designed to sustain gravity loads and upgraded against seismic actions by us-ing FRP (Fiber Reinforced Polymers) reinforcements. The performed theoretical investigation focused on the development of a FE modelling, including materials non-linearity and orthotropy, and on the use of an analytical approach. Referring to an exterior beam-column joint, the behaviour of strengthened connections has been analysed and compared with that of the un-strengthened connection. Different strengthening configurations have been tested, aiming to increase the joint ultimate capacity and to allow the formation of plastic hinges at the beam end, as required by the “capacity design” approach. The theoretical results showed a good per-formance of used strengthening technique. Results were analysed and compared with that of an analytical approach able to furnish the ultimate capacity of the connections and the kind of fail-ure mode, showing similar prediction.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
