1mW Reinforced Concrete Design to Eurocode 007
Two Way Slab Analysis (BS8110)
Two way slab is a type of slab with long edge to short edge ratio less than or equal to 2. When such slab is simply supported, its corners are not restrained to resist torsion. As a result, uplifting of corners may occur. If the corners of two way slab is reinforced against torsion, it is considered restrained slab.
The bending moment developed in slab is calculated by multiplying a coefficient with ultimate area load and square of short edge length. The coefficients are provided in Table 3.13 and Table 3.14, BS8110 Part 1: 1997 for simply supported and restrained slabs respectively.
Shear force in the edges of restrained slab is calculated by multiplying a coefficient with area load and short span length. The coefficient is provided in Table 3.15.
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