Tests of a Two-Way Reinforced Concrete Floor Slab

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Abstract
Construction and testing of a nine-panel two-way reinforced concrete floor slab are described. The panels were 5 ft sq. Stresses, strains, deflections, and cracking observed during the tests are described. Bending moments derived from measured strains are presented and are shown to be substantially different than the design moments at many design sections. The measured beam moments were appreciably lower than the design moments, but many of the slab sections were underdesigned. The slab design load was 145 psf and the failure load with all panels loaded was 537 psf. This compared favorably with the 529 psf predicted for the same failure mechanism by means of yield-line analysis methods.

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