Effect of floor slab on behavior of slab-beam-column connections

Catherine W. French, Jack P. Moehle

Research output: Chapter in Book/Report/Conference proceedingConference contribution

45 Scopus citations


In structures subjected to lateral loading, slab reinforcement acting as effective tensile reinforcement of the beams has been found to significantly increase the beam flexural strength. The enhanced beam flexural strength has several effects on the structural behavior including a shift in the ratio of strengths between the beams and other members. This may result in a failure mechanism different from that anticipated. The slab contribution depends on several variables including the connection type (interior or exterior), lateral deformation level, and lateral load history (uniaxial or multiaxial). This paper summarizes general behavior observed during isolated and multiple beam-column-slab connection tests. An approximation is given for estimating the amount of slab reinforcement to be considered as effective tensile reinforcement of the beams.

Original languageEnglish (US)
Title of host publicationDesign of Beam-Column Joints for Seismic Resistance
EditorsJames O. Jirsa
PublisherAmerican Concrete Institute
Number of pages34
ISBN (Electronic)9780870316210
StatePublished - Jan 1 1991

Publication series

NameAmerican Concrete Institute, ACI Special Publication
ISSN (Print)0193-2527

Bibliographical note

Funding Information:
The work described here was influenced significantly by research carried out at the University of Minnesota and the University of California at Berkeley, as well as by research discussions at workshops related to the US-NZ-Japan-China Cooperative Research Program on Reinforced Concrete Beam-Column Joints. The National Science Foundation of the United States provided funding for these activities. Statements made in the paper represent those of the authors, and do not necessarily reflect those of the NSF or of other participants in the US-NZ-Japan-China Cooperative Research Program.

Publisher Copyright:
© 1991 American Concrete Institute. All rights reserved.


  • Beams (supports)
  • Columns (supports)
  • Earthquake-resistant structures
  • Flexural strength
  • Joints (junctions)
  • Loads (forces)
  • Reinforced concrete
  • Slabs
  • T beams
  • Tests


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