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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Cyclic Lateral Loading of Nonductile Slab-Column Connections
Author(s): Ian Robertson and Gaur Johnson
Publication: Structural Journal
Appears on pages(s): 356-364
Keywords: loading; punching shear; slab
Abstract:Flat slabs with discontinuous bottom reinforcement are susceptible to progressive collapse if punching shear failure occurs at a slab-column connection. Many such failures have occurred in past earthquakes, resulting in significant loss of life. The evaluation of older flat-slab buildings must include a realistic prediction of the response of the slab-column connections. Considerable research has been performed on connections with continuous slab reinforcement; however, there is a lack of data on the performance of slab-column connections with discontinuous reinforcement. The research presented in this paper involved the cyclic lateral loading of six slab-column connections with discontinuous slab reinforcement typical of flat-slab buildings built prior to 1970. Punching shear failure does not appear to occur earlier than in equivalent specimens with continuous reinforcement; however, the consequences are significantly more severe. Based on this and prior research studies, a model is proposed for estimating the lateral drift at which punching failure may occur.
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