Title:
Application of Strip Model to Edge Column-Slab Connections Loaded with Outward Eccentricity
Author(s):
Bernardo Carrera, Eva O.L. Lantsoght and Scott D.B. Alexander
Publication:
Symposium Paper
Volume:
353
Issue:
Appears on pages(s):
124-141
Keywords:
arched strut, columns, eccentric punching shear, reinforced concrete, slabs, strip model
DOI:
10.14359/51737115
Date:
7/1/2022
Abstract:
The strip model describes a load path prior to failure that can be tailored to a wide range of slabs under concentrated loads, both concentric and eccentric. Eccentric punching shear can occur in concrete slab-column connections subjected to shear and unbalanced moment, such as edge and corner columns. This paper shows how the strip model is applied to experiments of edge column-slab connections tested with outward eccentricities, and compares this approach to the traditional and simplified ACI 318-19 approaches for dealing with eccentric punching shear. This work shows how a lower-bound plasticity-based model can be used for the practical case of the slab-column capacity for edge and corner columns, how it may explain the mechanics behind the ACI code provisions, and can help researchers identify adequate test setups for future experiments.
Related References:
ACI Committee 318, 1995, "Building code requirements for structural concrete (ACI 318-95) and commentary," American Concrete Institute; Farmington Hills, MI.
ACI Committee 318, 2019, "Building code requirements for structural concrete (ACI 318-19) and commentary," American Concrete Institute; Farmington Hills, MI, 503 pp.
Afhami, S., Alexander, S. D. B. and Simmonds, S. H., 1998, "Strip model for capacity of slab-column connections," Dept. of Civil Engineering, University of Alberta; Edmonton, xxi, 231 p. pp.
Albuquerque, N. G. B., Melo, G. S. and Robert, L. V., 2016, "Punching Shear Strength of Flat Slab-Edge Column Connections with Outward Eccentricity of Loading," ACI Structural Journal, V. 113, No. 05, 9/1/2016.
Alexander, S.D.B., 2017. "Shear and Moment Transfer at Column-Slab Connections," ACI SP-315: ACI-fib International Symposium - Punching Shear of Structural Concrete Slabs. pp. 1-22.
Alexander, S.D.B., Xilin Lu, and Simmonds, S.H. 1995. "Mechanism of Shear Transfer in a Column-Slab Connection," 1995 Annual Conference of the Canadian Society for Civil Engineering, Proceedings, Ottawa, Ontario, Vol. II, pp. 207-216.
Alexander, S. D. B. and Simmonds, S. H., 1992, "Bond Model for Concentric Punching Shear," ACI Structural Journal, V. 89, No. 3, pp. 325-334.
Alexander, S. D. B. and Lantsoght, E. O. L., 2018, "The Arched Strut - a Tool for Modelling Column-Slab Connections," IABSE 2018, Nantes, France.