Title:
Ultimate Strength of Slab-Column Connections
Author(s):
Scott B. Alexander and Sidney H. Simmonds
Publication:
Structural Journal
Volume:
84
Issue:
3
Appears on pages(s):
255-261
Keywords:
columns (supports); concrete slabs; connections; failure mechanisms; flat concrete plates; loads (forces); moments; punching shear; shear properties; strength; Structural Research
DOI:
10.14359/2518
Date:
5/1/1987
Abstract:
A method for determining the capacity of slab-column connections at ultimate load is presented. The method uses a truss analogy to model the flow of forces between the slab and column under combined shear and moment so that a complete shear-moment interaction diagram can be obtained for any given connection geometry. The model predicts not only the ultimate capacities of the connection but also the mechanism of failure. A new explanation for the punching phenomena is presented. It describes punching as the failure of the slab to confine concrete compression forces out of the plane of the slab. The capacity of a slab-column structure is defined by the lesser of two essentially independent capacities. These are the local slab-column connection strength and the overall slab strength.