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Title: Two-Way Shear Strength of Slab-Column Connections: Reexamination of ACI 318 Provisions

Author(s): Widianto, Oguzhan Bayrak, and James O. Jirsa

Publication: Commentary Reference

Volume:

Issue:

Appears on pages(s): 160-170

Keywords: building code; flat plate; slab-column connection; two-way shear strength.

DOI:

Date: 3/1/2009

Abstract:
In typical lightly-reinforced slab-column connections, extensive flexural yielding is likely to occur before the computed punching shear capacity is reached. The basic ACI 318 two-way shear strength provision has not changed since 1963 and was developed based on a statistical analysis of test results on scaled specimens that were believed to have failed in shear. Several researchers showed that the use of the basic ACI two-way shear strength provision yields results that were unconservative compared with the two-way shear strength of slabs in experimental tests. This paper shows that the applicability of the ACI 318 provisions for typical lightlyreinforced slabs is questionable.