Structural Engineering and Mechanics

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Experiments on reinforced concrete beam-column joints under cyclic loads and evaluating their response by nonlinear static pushover analysis

  • Sharma, Akanshu (Reactor Safety Division, Bhabha Atomic Research Centre) ;
  • Reddy, G.R. (Reactor Safety Division, Bhabha Atomic Research Centre) ;
  • Eligehausen, Rolf (Institut fur Werkstoffe im Bauwesen, Universitat Stuttgart) ;
  • Vaze, K.K. (Reactor Safety Division, Bhabha Atomic Research Centre) ;
  • Ghosh, A.K. (Reactor Safety Division, Bhabha Atomic Research Centre) ;
  • Kushwaha, H.S. (Health Safety & Environment Group, Bhabha Atomic Research Centre)
  • Received : 2008.05.23
  • Accepted : 2010.01.22
  • Published : 2010.05.10
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Abstract

Beam-column joints are the key structural elements, which dictate the behavior of structures subjected to earthquake loading. Though large experimental work has been conducted in the past, still various issues regarding the post-yield behavior, ductility and failure modes of the joints make it a highly important research topic. This paper presents experimental results obtained for eight beam-column joints of different sizes and configuration under cyclic loads along with the analytical evaluation of their response using a simple and effective analytical procedure based on nonlinear static pushover analysis. It is shown that even the simplified analysis can predict, to a good extent, the behavior of the joints by giving the important information on both strength and ductility of the joints and can even be used for prediction of failure modes. The results for four interior and four exterior joints are presented. One confined and one unconfined joint for each configuration were tested and analyzed. The experimental and analytical results are presented in the form of load-deflection. Analytical plots are compared with envelope of experimentally obtained hysteretic loops for the joints. The behavior of various joints under cyclic loads is carefully examined and presented. It is also shown that the procedure described can be effectively utilized to analytically gather the information on behavior of joints.

Keywords

References

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