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Structural Engineering and Mechanics Volume 23, Number 5, July30 2006 , pages 579-597 DOI: https://doi.org/10.12989/sem.2006.23.5.579 |
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Seismic design of beam-column joints in RC moment resisting frames – Review of codes |
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S. R. Uma and Sudhir K. Jain
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| Abstract | ||
| The behaviour of reinforced concrete moment resisting frame structures in recent earthquakes all over the world has highlighted the consequences of poor performance of beam column joints. Large amount of research carried out to understand the complex mechanisms and safe behaviour of beam column joints has gone into code recommendations. This paper presents critical review of recommendations of well established codes regarding design and detailing aspects of beam column joints. The codes of practice considered are ACI 318M-02, NZS 3101: Part 1:1995 and the Eurocode 8 of EN 1998-1:2003. All three codes aim to satisfy the bond and shear requirements within the joint. It is observed that ACI 318M-02 requires smaller column depth as compared to the other two codes based on the anchorage conditions. NZS 3101:1995 and EN 1998-1:2003 consider the shear stress level to obtain the required stirrup reinforcement whereas ACI 318M-02 provides stirrup reinforcement to retain the axial load capacity of column by confinement. Significant factors influencing the design of beam-column joints are identified and the effect of their variations on design parameters is compared. The variation in the requirements of shear reinforcement is substantial among the three codes. | ||
| Key Words | ||
| anchorage; beam-column joint; bond; code provisions; reinforced concrete frames; shear reinforcement. | ||
| Address | ||
| S. R. Uma; Department of Civil Engineering, University of Canterbury, New Zealand Sudhir K. Jain; Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur, India | ||