With the introduction of the harmonized European Standards, especially the EN 1998- 1:15.06.2015 and there ratification in the member states (Austria: 01.07.2009), the possibility for non linear static analysis ("Pushover Analysis") of structures was introduced. Although this procedure has been widely approved and utilized in the United States, the design of structures by a non linear analysis is a relatively recent development in Europe and therefore associated with risks, due the lack of experience in this field. This paper deals with the main influence factors on the non linear procedure using the N2-Method, introduced in EN 1998-1 Annex B, analysing buildings with geometrically simple floor plans stiffened by ductile walls. For this reason the main influence factors, as for example, the geometry of the ductile concrete walls, materials, reinforcement patterns or amount of bracing, were analysed to study the change on the loaddisplacement relation. In the first part of the thesis, the seismological respectively the engineering-seismological background is discussed. Also the current design methods for structures under seismic forces are presented. Subsequently, the basic assumptions for the parameter study such as the geometry, the materials or the soil parameters, are listed. In the following part, the main influence parameters, for example the length of the bracing walls, reinforcement ratio, concrete quality or the eccentricity of the seismic forces are varied in a parameter study on two buildings of different floor plan. This is done in order to evaluate the impact on the load-displacement relation and subsequently on the results of the calculation. Finally, the changes in the results are discussed and the main influence factors are identified.