CRITICAL-REVIEW OF THE CSA A23.3-94 PUNCHING SHEAR-STRENGTH PROVISIONS FOR INTERIOR COLUMNS

The purpose of this paper is to demonstrate that the shear design of s labs according to the relevant Canadian CSA A23.3-94 (and U.S. ACI 318 -95) design codes can be unsafe under certain conditions, and to propo se improved design equations, some of which should be considered immed iately for implementation in the Canadian CSA code. The paper deals wi th interior slab-column connections, with and without shear reinforcem ent, subjected to shear force alone or to a combination of shear force and unbalanced bending moment. Some comparisons with the British code BS 8110-85 and the CEB-FIP model code 1990 are also made. Tests repor ted in the literature and some experiments by the authors provide the basis for this study.