Moment and Shear Transfer Between Slab and Edge Column


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Title: Moment and Shear Transfer Between Slab and Edge Column

Author(s): B. Vijaya Rangan and A. S. Hall

Publication: Journal Proceedings

Volume: 80

Issue: 3

Appears on pages(s): 183-191

Keywords: building codes; columns (supports); connections; failure; flat concrete plates; flat concrete slabs; loads (forces); moments; punching shear; reinforced concrete; shear strength; spandrel beams; torsion.

Date: 5/1/1983

Tests on half-sized models of edge panels of a flat plate floor are described. One model contained a spandrel beam and three did not. The purpose was to investigate the distribution of forces around an edge column. Measured slab moments and shears along the face of the spandrel showed what proportion of the total panel moment entered the column directly as bending and how much as torsion in the spandrel. The proportion of shear on each face was also deduced. Both the observed behavior and measured forces indicated that failure orginated as a torsion-shear failure in the spandrel. Expressions are derived for the torsion and shear in the spandrel and also for the capacity of the spandrel to resist these. Emphasis is placed on adaquate torsion steel in the spandrel to prevent what has hitherto been called a punching shear faliure at an edge column.