Title:
Punching Shear Resistance of Corner Slab-Column Connections
Author(s):
Neil Hammil and Amin Ghali
Publication:
Structural Journal
Volume:
91
Issue:
6
Appears on pages(s):
697-707
Keywords:
columns (supports); connections; ductility; flat concrete plates; moments; punching shear; reinforced concrete; reinforcing steels; slabs; shear strength; Structural Research
DOI:
10.14359/1502
Date:
11/1/1994
Abstract:
Test results of five full-scale reinforced concrete flat-plate connections with corner columns subjected to shear-moment transfer are reported. The variable parameters are the amount of shear reinforcement and the loading procedure. The design procedure in the ACI 318-89 code and the Canadian Standard CAN3-A23.3-M84 is discussed. The tests show that the equations of the codes are conservative and can be improved by the addition of an appropriate equation for v for corner columns, where v is the fraction of the unbalanced moment resisted by eccentric shear stress. It is shown that the codes, or their commentaries, need to provide the equations necessary to determine the extent of the shear-reinforced zone for a corner column connection. The design method given in ACI 352.1R-89 is shown to result in unsafe design of corner slab-column connections [Clause 4.2.1.2(b)].