Code Investigation and Experimental Study of Wide Beam-Column Connections

Document Type : Research Article

Authors

1 PHD candidate,school of Civil Engineering, University of Tehran, Tehran, Iran

2 Associate professor, school of Civil Engineering, University of Tehran, Tehran, Iran

Abstract

In this paper, the seismic behavior of wide beams was investigated. First, code provisions and results of previous tests on reinforcement concrete wide beam-column connections were reviewed. After a precise investigation of previous test results and a detailed study of the behavior of wide joints, 4 specimens of exterior wide beam-column connections on a scale of 3:5 were cast and tested under constant axial and cyclic lateral loads. The specimens were designed and detailed under ACI 318-14 and ACI 352R-02. In tested specimens, different geometries for columns (square, rectangular or circular) and spandrel beams (wide or conventional) were considered. During the tests, the formation of the full-width flexural plastic hinge of wide beams was observed in all the specimens without any shear or torsional failure. Energy absorption of specimens was relatively high and that is because of using stirrups at the joint area and axial loads applied to columns. The width of the spandrel beam and geometry of columns influenced the seismic performance of tested specimens. A comparison between experimental results and ACI provisions showed that dimensional limitations of ACI 318 on wide beams can be violated. Also, in wide joints with an axial load ratio greater than 15%, the bond performance of column longitudinal bars is improved, and ACI 352R provisions in this context can be relaxed.

Keywords

Main Subjects

References

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Amirkabir Journal of Civil Engineering
Volume 53, Issue 7
October 2021
Pages 2957-2976

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