In case of Moment Resisting Frame (MRFs), most recent version of Eurocode 8 allows dissipating the seismic input energy by means of the plastic engagement of beam-tocolumn joints provided that their dissipative characteristics under cyclic loads are demonstrated to be adequate. In previous works of the authors, design criteria able to detail beam-to-column joints so as to engage in plastic range different joint components have been pointed out. Furthermore, the accuracy of the design criteria have been verified by means of an experimental program devoted to compare the dissipative characteristics of four real-scale beam-to-column joints designed to possess the same resistance but different dissipative characteristics. In this paper, on the base of past research efforts' dealing with testing and modeling of isolated T-stubs and beam-to-column joints, an innovative approach is presented. As a consequence of a previous experimental program devoted to the comparison of the dissipative behavior of classical and dissipative T-stubs characterized by X-shaped flanges, an innovative double split tee joint fastening the beam to the column through X-shaped T-stubs is presented and its behavior under cyclic loads is experimentally compared to that of a classical detail. Furthermore a design criterion able to obtain an X-shaped T-stub joint with same resistance and stiffness of a classical T-stub joint is presented and its accuracy is verified on the base of the obtained experimental results.
Experimental Behavior and Mechanical Modeling of Dissipative T-Stub Connections
LATOUR, MASSIMO;RIZZANO, Gianvittorio
2012-01-01
Abstract
In case of Moment Resisting Frame (MRFs), most recent version of Eurocode 8 allows dissipating the seismic input energy by means of the plastic engagement of beam-tocolumn joints provided that their dissipative characteristics under cyclic loads are demonstrated to be adequate. In previous works of the authors, design criteria able to detail beam-to-column joints so as to engage in plastic range different joint components have been pointed out. Furthermore, the accuracy of the design criteria have been verified by means of an experimental program devoted to compare the dissipative characteristics of four real-scale beam-to-column joints designed to possess the same resistance but different dissipative characteristics. In this paper, on the base of past research efforts' dealing with testing and modeling of isolated T-stubs and beam-to-column joints, an innovative approach is presented. As a consequence of a previous experimental program devoted to the comparison of the dissipative behavior of classical and dissipative T-stubs characterized by X-shaped flanges, an innovative double split tee joint fastening the beam to the column through X-shaped T-stubs is presented and its behavior under cyclic loads is experimentally compared to that of a classical detail. Furthermore a design criterion able to obtain an X-shaped T-stub joint with same resistance and stiffness of a classical T-stub joint is presented and its accuracy is verified on the base of the obtained experimental results.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
