Moment and Shear Transfer Between Slab and Edge Column.

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 originated 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 adequate torsion steel in the spandrel to prevent what has hitherto been called a punching shear failure at an edge column. [ABSTRACT FROM AUTHOR]