Full nonlinear analysis of a number of floor slabs of laterally loaded shear wall structures is performed with the aid of two-dimensional nonlinear plate bending finite element programme. The purpose was to study the flexural behaviour of such slabs in the post elastic range upto failure and to study in depth the problems associated with the nonlinear analysis of such slabs including the validity of theoretically predicted stresses and strains in concrete and reinforcing steel at different points in the slab at different stages of loading, load-displacement history and ultimate loads. All the slabs analysed belonged to the reinforced concrete models which were actually tested by the author in the laboratory. Nevertheless the models were so designed that the flexural and shear strengths of slabs themselves were far higher than the strengths of wall slab junctions. Therefore the full flexural behavior of the slab could not be achieved experimentally. The particular details of the slabs analysed, the F.E. programme used, the procedure adopted, the results obtained and other related information are presented.