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Anchorage details and joint design in seismic RC frames
, Rai D.C., Bajpai K.K., Jain S.K.
Published in
2001
Volume: 75
   
Issue: 4
Pages: 274 - 280
Abstract
The Indian design codes do not have any provisions for the design of beam-column joints in reinforced concrete (RC) frames. Also, the anchorage detail for anchoring the beam bars into the columns is very poor particularly from the seismic performance point of view. This paper highlights the importance of carefully designing the beam-column joints for satisfactory performance during strong seismic shaking of RC frame buildings. Results of an experimental investigation of four RC frame sub-assemblages of an exterior joint with different detailing schemes and beam bar anchorages, subjected to pseudo-static cyclic loading, are used to support this need. The experiments reveal that practical joint detailing using hairpin-type reinforcement is a competitive alternative to providing closed ties in the joint region. Further, the experiments demonstrate that anchoring the beam bars into the columns by ensuring a strong column-weak beam design of the frame is essential in developing a good hysteretic response in the frame.
About the journal
JournalIndian Concrete Journal
ISSN00194565
Open AccessNo