Structural displacements and member deformations do not enjoy a primary role in the currentrnforce-based seismic load resistance design. Their absolute magnitude is of interest only forrnaspects considered of secondary importance for seismic performance and safety. In the mainrnphases of current force-based design, namely that of member dimensioning for given strengthrndemands and that of detailing, structural displacements and member deformations enter in anrnaverage sense and indirectly. Recent years have seen, however, an increased interest inrnabsolute magnitude of displacement and deformations as the basis of seismic design. Thernmain reason for this is the recent recognition that displacement rather than strength, demandsrnand capacities is what determines seismic performance and safety. Since an earthquake isrndynamic action, it represents for a structure a demand to withstand certain displacement andrndeformations, but not specific forces. In this work the recent displacement based designrnphilosophy is assessed, examined and compared with the current traditional force-basedrndesign philosophy as applied for reinforced concrete frame buildings by taking representativernframe buildings without structural wall to be analyzed using both methods so that thernlimitations and suitability of the recent method can be drawn as well as the parameters to bernconsidered is examined by taking span length, story height, beam depth and number ofrnstories as a parameter. The parametric study shows that this new design philosophy accountsrnparameters those affect the response of the structure directly in transparent way. Specially,rnthe span length and beam depth have significant influence on the resulting strengthrnrequirement. It is also simple for practical application in addition to its basic on convincingrnand logical theoretical back ground. In this thesis work, a lot of effort have been done tornintroduce the world wide trend of shifting the design philosophy towards displacement-basedrnwhich and also help further researchers to insight the detail researchable areas those guide forrnthe revision of our seismic design building standard codes.