(Received 24 June 2012; accepted 24 April 2013)
Published Online: 2013
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The non-linear performance of beam-column joint specimens with different types of reinforcement (thermo-mechanically treated [TMT] and twisted ore reinforced [TOR]) has been evaluated under cyclic loading. A number of parametric variations in the preparation of joints, such as the type of reinforcement, the percentage of reinforcement, and the effect of confinement, have been studied. Comparative cyclic test results have been plotted in the form of hysteresis behavior, envelope of load deformation curves, cumulative energy dissipation curves, strength and stiffness decay curves, etc. The effects of types of reinforcement and confinement of beam-column joint specimens possessing the same percentage of reinforcement have been clearly manifested in non-linear performance evaluation parameters. The energy dissipation in beam-column joint specimens increases with the percentage of reinforcement, but it also decreases as the reinforcement characteristics change from ductile to brittle. A higher over-strength ratio has been observed in joint specimens with TOR reinforcement than in specimens with TMT reinforcement. The post-elastic stiffness degradation is lower in specimens with TMT reinforcement than in specimens with TOR reinforcement over a constant post-elastic drift.
Surya Kumar Dadi, V. V. S.
Assistant Professor, Dept. of Civil Engineering, Institute of Technology, Guru Ghasidas Vishwavidyalaya, Bilaspur, (C.G.)
Associate Professor, Dept. of Earthquake Engineering, IIT Roorkee, Roorkee,
Stock #: ACEM20120020