الفهرس 
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Abstract
The research reported in this thesis is concerned with the study of the behavior of slabs supported on beams to evaluate the approximate method adopted by the Egyptian Code of Practice for the design of reinforced concrete buildings. The thesis contains analytical study using the computer program (SAP).
The study and the program are based on the elastic behavior. The study was basically conducted for slabs supported on beams with depth varied from twice to eight times the slab thickness. The slabs were arranged in groups to simulate the nine boundary conditions of slabs supported along their edges.
The results compared the values given by the research (values obtained by S’AP90) with that obtained when the code method was applied. It was found that the code method, when applied, yields safe buildings. However, there were some differences arising from the fact that slabs behave as a three dimensional body, while the code method is based on considering two perpendicular strips each is behaving as a beam (two dimensional behavior). It was noted that to apply the code in our design for slabs supported on beams, beams should be rigid enough to be used. Also, the beam depth must be three times the slab thickness without taking the slab thickness itself (the projecting depth is three times the stab thickness). The thesis included the following 5 chapters; Chapter 1: General Introduction
Chapter 2: Review for slab design, Where an introduction to the basic methods for the analysis of plates and the design of slabs was made. This chapter included the basic theories and methods of design whether the method is based on the elastic or non linear behavior at ultimate state or general equilibrium method such as the strip method,
Chapter 3: The method of analysis used to obtain the internal forces was explained. Also the comparative study between the analytical methods and the code method for slabs with aspect ratios varying between 1 and 2. The aspect ratio was assessed considering the varying edge conditions of the slabs. This chapter included the results of the parametric study using the {SAP 90) program and the comparisons made with the code values for the same conditions
Chapter 4: This chapter included the discussion and recommendations made for the study of the effect of live load and the effect of changing beam depth
Chapter 5: Included the conclusions and recommendations based on the previous chapter. Conclusions and recommendations for future studies.