Moment Capacity Ratio at Column – Beam Joint in a RC Framed Structure

Authors

  • Jawala Kumar M.Tech. Scholar Rattan Institute of Technology and Management Bhopal, M.P, India
  • Mr. Varun Kumar Sikka Assistant Professor Rattan Institute of Technology and Management Bhopal ,M.P, India

DOI:

https://doi.org/10.24113/ijoscience.v6i3.274

Abstract

Beam-column joint is the gap in the modern ductile design of building. Especially under the earthquake loading this is more susceptible to damage. Due to brittle nature of failure this type of failure cannot be afford. Since 1970’s this areas is under the light of research, but with the paper of Park and Paul, It got momentum. But still due to versatile nature of the joints core behaviour, the problem is still persisting. Though many international codes recommend the moment capacity ratio at beam column joint to be more than one, There are discrepancies among the major international codes with regard to MCR. Indian standard codes for design of RC framed buildings are silent on this aspect. Draft 13920 (2014) code suggests a value of MCR similar to other international codes without proper theoretical basis. Hence a rational study is required on the values of MCR. A computationally attractive procedure for calculating flexural capacity of column developed for determining MCR at a beam-column joint. To reach at an appropriate and acceptable MCR for capacity design of RC framed building reliability based approach is done. This research deals with the fragility and reliability analysis of five, seven and ten storey RC frames designed using various values of MCR ranging from 1.0 to 3.2. The RC frames are designed as per IS 1893 (2002) for all seismic zones. Hazard curves required of various seismic location in India (like zone II, III, IV and V) has been selected from National Disaster Management Authority, Government of India. Seismic risk assessment of all the designed buildings is conducted and based on the achieved Reliability Index and the Target Reliability Index minimum value of Moment Capacity Ratio (MCR) is suggested.

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References

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[5] NZS 3101: Part 2:1995 “Concrete Structures Standard, Part 2: Commentary on the Design of Concrete Structures”, New Zealand Standard, New Zealand, 1995.
[6] Uma, S. R., “Seismic Behaviour of Beam Column Joints in Moment Resisting Reinforced Concrete Frame Structures,” submitted to Indian Concrete Journal, October 2004
[7] FEMA-273. “NEHRP guidelines for the seismic rehabilitation of buildings.” Federal Emergency Management Agency, Washington DC, 1997.
[8] ATC-40. “Seismic evaluation and retrofit of concrete buildings.” Volume 1 and 2. Applied Technology Council, Redwood City California, 1996.
[9] Rana Rahul, Jin Limin and Zekioglu Atila (2004) “pushover analysis of a 19 story concrete shear wall building” submitted to 13th world conference on Earthquake Engineering(2004).
[10] Zhang, L., and Jirsa, J.O., “A Study of Shear Behaviour of RC Beam-Column Joints,” PMFSEL Report No. 82-1, University of Texas at Austin, Feb. 1982.

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Published

2020-03-10

How to Cite

Kumar, J., & Sikka, M. V. K. (2020). Moment Capacity Ratio at Column – Beam Joint in a RC Framed Structure. SMART MOVES JOURNAL IJOSCIENCE, 6(3), 1-7. https://doi.org/10.24113/ijoscience.v6i3.274